CN101752824A - Overload protection method, overload protection device and system for load - Google Patents
Overload protection method, overload protection device and system for load Download PDFInfo
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Abstract
The embodiment of the invention provides an overload protection method, an overload protection device and a system for loads. The overload protection method comprises the steps of detecting the information output by the output end of a current sharing control circuit in a thermal stand-by power source; determining whether the thermal stand-by power source is overloaded according to the detected information; and if the power supply of the thermal stand-by power source is overloaded, powering off the thermal stand-by power source. By detecting the information output from the output end of the current sharing control circuit, whether the power supply of the thermal stand-by power source is overloaded is determined according to the detected information, and the thermal stand-by power source is powered off if the power supply of the thermal stand-by power source is overloaded, thereby overcoming the defects of poor overload protection effect and low reliability of loads in the prior art, and effectively powering off the thermal stand-by power source when the power supply of loads is overloaded, thus effectively protecting loads from being damaged and improving the reliability of using the thermal stand-by power source on loads.
Description
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to a load overload protection method, an overload protection device, and an overload protection system.
Background
At present, when power is supplied to a storage system with higher reliability, in order to improve the reliability of power use, a power supply usually adopts a power supply mode of a hot standby power supply, that is, the hot standby power supply is composed of a plurality of power supply modules with the same function, the rated power of each power supply module is not less than the rated power of a load, and all the power supply modules work simultaneously when the hot standby power supply is started. The current-sharing control circuit is arranged in each power module, when the output end of each power module in the hot standby power supply is connected with an external load together for supplying power, the current-sharing control circuits of each power module are mutually and electrically connected together, and the current-sharing control circuits can enable each power module to share the current of the load on average according to the current value of the load, so that each power module outputs the current with the same size. For example, the hot standby power supply includes two power modules. When the two power supply modules work normally, the current sharing control circuit enables each power supply module to bear half of the current of the load; when one of the power modules fails and both power modules operate normally, the current of each power module must be less than 50% of the load rating. The fuse is arranged on the hot standby power supply, the fuse plays a role in overload protection of the load, and the other power supply module independently supplies power to the load and bears the full current of the load.
However, when the hot standby power supply is overloaded, the current precision controlled by the fuse is low, and the fuse is required to be fused to cut off the power supply, so that the load is easily damaged during overload; in addition, since the power of the power module is not less than the rated power of the load, the power module needs to start the overload protection mechanism when the current exceeds the rated current of the load by at least two times. Therefore, the load overload protection effect in the prior art is poor, and the reliability is low.
Disclosure of Invention
The embodiment of the invention provides a load overload protection method, an overload protection device and a system, which are used for overcoming the defects that the overload protection effect of a load is poor and the use reliability of a hot standby power supply in the load is low in the prior art and improving the use reliability of the hot standby power supply in the load.
The embodiment of the invention provides an overload protection method for a load, which comprises the following steps:
detecting information output by an output end of a current-sharing control circuit in a hot standby power supply of a load;
determining whether the hot standby power supply is overloaded for supplying power to a load according to the detected information;
and if the power supply of the hot standby power supply is overloaded, the hot standby power supply is closed.
An embodiment of the present invention provides an overload protection apparatus, including:
the detection module is used for detecting information output by the output end of the current-sharing control circuit in the hot standby power supply of the load;
the analysis module is used for determining whether the power supply of the hot standby power supply is overloaded or not according to the detected information;
and the processing module is used for closing the hot standby power supply if the power supply of the hot standby power supply is overloaded.
The embodiment of the invention provides an overload protection system, which comprises a load, a hot standby power supply and an overload protection device, wherein current sharing control circuits in each power supply module in the hot standby power supply are connected with each other; the hot standby power supply is connected with the load and used for supplying power to the load; one end of the overload protection device is connected with the output end of the current-sharing control circuit, and the other end of the overload protection device is connected with the load.
According to the load overload protection method, the overload protection device and the system, the information output by the output end of the current-sharing control circuit of the power module of the hot standby power supply is detected, whether the power supply of the hot standby power supply is overloaded or not is determined according to the detected information, and the hot standby power supply is turned off when the power supply of the hot standby power supply is overloaded, so that the defects that the overload protection effect of the hot standby power supply is poor and the reliability is low in the prior art are overcome, and the hot standby power supply can be effectively turned off when the power supply of the hot standby power supply is overloaded, so that the load is effectively protected from being damaged, and the reliability of the hot standby power.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a flow chart of an embodiment of the overload protection method of the present invention;
FIG. 2A is a flowchart of an embodiment of the overload protection method of the present invention;
FIG. 2B is a flowchart illustrating an embodiment of a load overload protection method according to the present invention;
FIG. 3A is a diagram of the output power of the hot standby power supply;
FIG. 3B is a voltage diagram of the output terminal of the current sharing control circuit of the power module in the hot standby power supply;
FIG. 4 is a schematic structural diagram of an overload protection apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an embodiment of a hot standby power supply according to the present invention;
fig. 6 is a schematic structural diagram of an embodiment of the overload protection system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of an embodiment of the overload protection method of the present invention. As shown in fig. 1, the method for load overload protection of the present embodiment includes:
and 102, if the power supply of the hot standby power supply is overloaded, closing the hot standby power supply.
In the embodiment of the invention, the information output by the output end of the current-sharing control circuit in the hot standby power supply is detected by introducing a current-sharing control signal into the current-sharing control circuit, so that the information of the output end of the current-sharing control circuit in the hot standby power supply is obtained, the information of the output end of the current-sharing control circuit is detected at certain time intervals, whether the power supply of the hot standby power supply is overloaded or not is determined according to the detected information, and all power modules in the hot standby power supply are turned off when the power supply of the hot standby power supply is overloaded.
In the embodiment of the present invention, determining whether the hot standby power supply is overloaded supplying power to the load is implemented by determining whether the power supplied by the hot standby power supply to the load is overcurrent according to the detected information.
Fig. 2A is a flowchart illustrating an embodiment of the overload protection method according to the present invention. As shown in fig. 2A, the overload protection method for the hot standby power supply of this embodiment includes:
and 200, setting information output by the output end of the current-sharing control circuit when the load is at rated power as a preset threshold value.
Specifically, in the process that the hot standby power supply supplies power to the load, the preset threshold value is information output by the output end of the current sharing control circuit under the condition that the load is at rated power.
Specifically, the information detected by the load overload protection method of this embodiment may be a voltage value, and the preset threshold may be a preset voltage threshold; alternatively, the information may be a current value, and the preset threshold may be a preset current threshold. When the load overload protection method is used for detecting the voltage value or the current value of the output end of the current-sharing control circuit, the load overload protection method can detect the voltage value or the current value of the output end of the current-sharing control circuit according to a preset detection period, the voltage value or the current value of the output end of the current-sharing control circuit does not need to be detected continuously, the detection times are reduced, and therefore the detection efficiency is improved. The preset detection period can be set according to actual needs, and the length of the preset detection period is not limited by the invention.
Specifically, the present embodiment will be described by taking the example of detecting the information output by the output terminal of the current sharing control circuit as the voltage value. And after the voltage value of the output end of the current-sharing control circuit is detected, analyzing whether the detected voltage value is larger than a preset voltage threshold value of the output end of the current-sharing control circuit. The preset voltage threshold value of the output end of the current-sharing control circuit is the voltage value of the output end of the current-sharing control circuit when the hot standby power supply is in a load rated power state. The preset voltage threshold value of the output end of the current-sharing control circuit can be known in the following mode: the method comprises the steps of detecting the voltage of the output end of a current-sharing control circuit of a power module in a hot standby power supply to obtain the voltage when a load is in a load rated power state. And in the second mode, because the voltage value output by the hot standby power supply is fixed and invariable, according to a formula for calculating power: the power is equal to the voltage multiplied by the current, and the output power of the hot standby power supply and the current are in a linear relation. The current-sharing control circuit of each power module in the hot standby power supply keeps the same current value in each power module, that is, the current value in each current-sharing control circuit is also the same and is equal to 1/n of the output current of the hot standby power supply (n is the number of the power modules in the hot standby power supply). Meanwhile, the resistance in the current-sharing control circuit is unchanged, so that the voltage in the current-sharing control circuit and the power output by the hot standby power supply form a linear relation, and therefore, the preset voltage threshold value of the output end of the current-sharing control circuit when the load is at the rated power can be obtained by detecting the voltage value of the output end of the current-sharing control circuit when the load is at different powers. Specifically, fig. 3A is a diagram of output power of the hot standby power supply, and fig. 3B is a diagram of voltage at the output terminal of the current sharing control circuit of the power module in the hot standby power supply. As shown in fig. 3A and fig. 3B, the present embodiment takes the rated power of the load as 500W as an example, and how to obtain the preset voltage threshold at the output terminal of the current sharing control circuit is described. In the process of load operation, when the power supplied to the load by the hot standby power supply is 250W, the voltage value of the output end of the current sharing control circuit, such as the voltage value of the point a in fig. 3B, can be detected; when the power supplied by the hot standby power supply to the load is 375W, the voltage value at the output end of the current sharing control circuit, such as the voltage value at point B in fig. 3B, can be detected. According to the voltages of the point a and the point B, the linear relationship between the voltage value of the output end of the current-sharing control circuit and the output power value of the hot standby power supply can be known, so that the preset voltage threshold value of the output end of the current-sharing control circuit when the load is at the rated power can be obtained, such as the voltage value of the point C in fig. 3B. The preset current threshold value of the output end of the current-sharing control circuit can also be known by the method, and is not described herein again.
Further, in order to effectively perform overload protection on the load supplied by the hot standby power supply, prevent each power module in the hot standby power supply from erroneously drawing a conclusion of load overload due to a current error, and avoid performing frequent overload protection on the load, so that the load can operate smoothly, step 202 in this embodiment is preferably: if the detected voltage value is larger than k times of the preset voltage threshold value, determining that the hot standby power supply is overloaded; or if the detected current value is larger than k times of the preset current threshold value, determining that the hot standby power supply is overloaded; wherein the value range of k is 1-1.5.
In the embodiment of the present invention, determining whether the hot standby power supply is overloaded when supplying power to the load is implemented by determining whether the power supplied to the load by the hot standby power supply is overcurrent according to the detected information.
Specifically, when the load is in normal operation, the currents in the power modules in the hot standby power supply may not be completely the same, and a certain difference may exist. Therefore, in order to more accurately determine whether the hot standby power supply has a power supply overload phenomenon, when it is determined whether the hot standby power supply has a power supply overload phenomenon in the process of supplying power to the load, step 202 determines that the hot standby power supply has a power supply overload by analyzing whether the detected voltage value at the output end of the current-sharing control circuit is greater than k times of the preset voltage threshold value at the output end of the current-sharing control circuit, and if the detected voltage value at the output end of the current-sharing control circuit is greater than k times of the preset voltage threshold value at the output end of the current-sharing control circuit. Similarly, the detected current value of the output end of the current-sharing control circuit can be compared with k times of the preset current threshold value of the output end of the current-sharing control circuit. The value of k is in direct proportion to the number of power modules in the hot standby power supply, the more power modules are, the larger the error generated by the power modules is, and therefore the value of k is correspondingly increased to ensure the accuracy of judging whether the power supply of the hot standby power supply is overloaded or not. In this embodiment, a preset voltage threshold is taken as an example for description, for example, k may be set to be 1.25, and when it is detected that the voltage value of the output end of the current sharing control circuit is greater than 1.25 times of the preset voltage threshold of the output end of the current sharing control circuit, it may be determined that the hot standby power supply is overloaded. The detected voltage value is compared with the preset voltage threshold value which is 1.25 times, so that whether the power supply of the hot standby power supply is overloaded or not can be judged more accurately.
And 203, if the power supply of the hot standby power supply is overloaded and the duration time of the hot standby power supply in the power supply overload state is longer than the preset time, closing the hot standby power supply.
Specifically, in the normal operation process of the load, the transient current of the hot standby power supply exceeds the rated current of the load due to the influence of the external environment, but the transient current of the load returns to normal after the transient buffer. In order to prevent the hot standby power supply from frequently performing power supply overload protection on the load when the above phenomenon occurs, in step 202 of this embodiment, the hot standby power supply is turned off when it is determined that the hot standby power supply is overloaded and the duration of the load in the state of power supply overload is greater than the preset time. That is to say, the hot standby power supply will turn off the power module in the hot standby power supply when the condition that the hot standby power supply is overloaded and the time that the load is in the overload state is longer than the preset time is satisfied, so as to reduce the frequent overload protection of the load. The preset time can be determined according to the actual condition of the load, and the length of the preset time is not limited by the invention. For example, the preset time may be set to 0.5 or 1 second, and when the hot standby power supply is in the power supply overload state for more than 1 second, the hot standby power supply is turned off. Whether the hot standby power supply is overloaded or not is determined by setting a preset time, and whether the load is really overloaded or not can be judged more accurately, so that frequent power supply overload protection of the load is prevented, and the load cannot work normally.
The hot standby power supply overload protection method can be applied to a storage system with higher power supply requirement, such as an SSD (solid state drive) hard disk or high-reliability storage equipment; the method can also be applied to user terminals which can not be powered off, such as servers in banks and other equipment.
According to the overload protection method for the hot standby power supply, the voltage value or the current value of the output end of the current sharing control circuit of the power module is detected, the detected voltage value or the detected current value is analyzed to determine whether the power supply of the hot standby power supply is overloaded or not, the power module in the hot standby power supply is turned off when the power supply of the hot standby power supply is overloaded, the defects that the overload protection effect of a load is poor and the reliability is low in the prior art are overcome, and the power module can be effectively turned off when the power supply of the hot standby power supply is overloaded, so that the load is effectively protected from being damaged, and the reliability of the hot standby power supply. The voltage value or the current value of the output end of the current-sharing control circuit is detected according to the preset detection period, so that the detection times are reduced, and the detection efficiency is improved. The voltage value (or the current value) of the output end of the current-sharing control circuit is compared with k times of the preset voltage threshold value (or k times of the preset current threshold value) of the output end of the current-sharing control circuit to determine whether the hot standby power supply is overloaded or not, so that the overload protection can be effectively performed on the load supplied by the hot standby power supply, the frequent overload protection can be prevented from being performed on the load, and the load can stably run. The hot standby power supply is turned off only when the power supply of the hot standby power supply is overloaded and the duration time of the power supply overload state of the hot standby power supply is longer than the preset time, so that frequent power supply overload protection of the hot standby power supply can be reduced, the load can stably run, and the reliability of the hot standby power supply can be improved.
Fig. 2B is a flowchart of an embodiment of the load overload protection method of the present invention. As shown in fig. 2B, the method for load overload protection of the present embodiment includes:
and 200, setting information output by the output end of the current-sharing control circuit when the load is at rated power as a preset threshold value.
Step 202', calculating the power value output by the hot standby power supply according to the detected information, and determining that the power supply of the hot standby power supply is overloaded if the power value output by the hot standby power supply is greater than the rated power of the load; or calculating the current value output by the hot standby power supply according to the detected information, and determining that the power supply of the hot standby power supply is overloaded if the current value output by the hot standby power supply is greater than the rated current of the load.
And 203, if the power supply of the hot standby power supply is overloaded and the duration time of the hot standby power supply in the power supply overload state is longer than the preset time, closing the hot standby power supply.
Specifically, step 200, step 201, and step 203 in this embodiment are the same as those in embodiment two, and reference may be specifically made to the description in embodiment two, and details are not repeated here. In step 202', the output power value of the hot standby power supply is calculated according to the detected information; by comparing the calculated power value with the rated power value of the load, whether the hot standby electric heating is overloaded or not can be conveniently known. Similarly, in step 201, the current value output by the hot standby power supply can be obtained by calculating according to the detected information; by comparing the calculated current value with the current threshold value of the load, whether the hot standby electric heating is overloaded or not can be conveniently known. The detected information in the present embodiment may be a voltage value or a current value. In addition, in the method for calculating the power value or the current value output by the hot standby power supply in this embodiment, reference may be made to the method for calculating the voltage threshold of the output end of the current sharing control circuit in the second mode. Specifically, a linear proportional relation between the voltage value at the output end of the current-sharing control circuit and the power value output by the hot standby power supply can be obtained according to the voltage value at the point a and the corresponding power value output by the hot standby power supply, and the voltage value at the point B and the corresponding power value output by the hot standby power supply in fig. 3B. After the voltage value of the output end of the current-sharing control circuit is detected, the power value output by the hot standby power supply can be known according to the linear proportional relation, so that the power value can be compared with the rated power of the load. Similarly, the method for obtaining the output current value of the hot standby power supply can refer to the method for the output power value of the hot standby power supply, and is not described herein again.
According to the overload protection method for the hot standby power supply, the power value or the current value output by the hot standby power supply is calculated according to the detected information output by the output end of the current-sharing control circuit, so that whether the hot standby power supply is overloaded or not can be conveniently known by comparing the power value output by the hot standby power supply with the rated power of a load; similarly, whether the hot standby power supply is overloaded or not can be conveniently known by comparing the current value output by the hot standby power supply with the current magnitude of the load.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Fig. 4 is a schematic structural diagram of an overload protection apparatus according to an embodiment of the present invention. As shown in fig. 4, the overload protection apparatus of the present embodiment includes: detection module 1, analysis module 2 and processing module 3, wherein:
the detection module 1 is used for detecting information output by an output end of a current-sharing control circuit in a hot standby power supply of a load;
the analysis module 2 is used for determining whether the power supply of the hot standby power supply is overloaded or not according to the detected information;
and the processing module 3 is used for turning off the hot standby power supply if the power supply of the hot standby power supply is overloaded.
Specifically, the detection module 1 in the overload protection apparatus of this embodiment may detect a voltage value or a current value at an output end of a current sharing control circuit of a power module in a hot standby power supply; the analysis module 2 analyzes the voltage value or the current value detected by the detection module 1 to determine whether the power supply of the hot standby power supply is overloaded; and the processing module 3 closes the hot standby power supply under the condition that the analysis module 2 determines that the power supply of the hot standby power supply is overloaded according to the analysis result of the analysis module 2. The overload protection device can be installed in a hot standby power supply for supplying power to a high-performance storage system; and can be installed on some equipment requiring continuous power supply.
According to the overload protection device provided by the embodiment of the invention, the detection module 1 is used for detecting the information output by the output end of the current-sharing control circuit of the power supply module, the analysis module 2 is used for determining whether the power supply of the hot standby power supply is overloaded or not according to the detected information, and the processing module is used for closing the power supply module in the hot standby power supply when the power supply of the hot standby power supply is overloaded, so that the defects of poor load overload protection effect and low reliability in the prior art are overcome, and the power supply module can be effectively closed when the power supply of the hot standby power supply is overloaded, so that the load is effectively protected from being damaged, and the.
Based on the above technical solution, optionally, the overload protection apparatus of this embodiment further includes a setting module 4: and the current sharing control circuit is used for setting the information output by the output end of the current sharing control circuit as a preset threshold value when the load is at rated power.
Specifically, the setting module 4 in this embodiment is configured to set a preset threshold value, so that the preset threshold value is provided for the analysis module 2 to use, and the analysis module 2 determines whether the hot standby power supply is overloaded according to the preset threshold value and the detected information. The preset threshold value is information output by the output end of the current-sharing control circuit under the condition that the load is at rated power.
The overload protection device of the embodiment can set a preset threshold value by the setting module through the setting module, so that the analysis module can conveniently determine whether the hot standby power supply is overloaded or not.
Based on the above technical solution, optionally, the information in this embodiment is a voltage value, and the preset threshold is a preset voltage threshold; or, the information is a current value, and the preset threshold is a preset current threshold; the analysis module 2 is specifically configured to determine that the hot standby power supply is overloaded if the detected voltage value is greater than a preset voltage threshold value; or, the analysis module 2 is configured to determine that the hot standby power supply is overloaded if the detected current value is greater than the preset current threshold. Specifically, the analysis module 2 in this embodiment may determine whether the voltage value detected by the detection module 1 is greater than a preset voltage threshold value at the output end of the current sharing control circuit; if yes, the hot standby power supply is overloaded. Or, the analysis module 2 may determine whether the current value detected by the detection module 1 is greater than a preset current threshold value at the output end of the current sharing control circuit; if yes, the hot standby power supply is overloaded.
Further, in order to effectively perform overload protection on a load supplied by a hot standby power supply, prevent each power module in the hot standby power supply from erroneously obtaining a conclusion of load overload due to a current error, and avoid performing frequent overload protection on the load so that the load can stably operate, the analysis module 2 in this embodiment may be further configured to determine that the hot standby power supply is overloaded if the detected voltage value is greater than k times of a preset voltage threshold value; or, the analysis module 2 may be further configured to determine that the hot standby power supply is overloaded if the detected current value is greater than k times of the preset current threshold; wherein the value range of k is 1-1.5. Specifically, when the load is in normal operation, the currents in the power modules in the hot standby power supply may not be completely the same, and a certain difference may exist. Therefore, in order to more accurately determine whether the hot standby power supply has a power supply overload phenomenon through the analysis module 2, when judging whether the hot standby power supply has a power supply overload phenomenon in the process of supplying power to the load, the analysis module 2 compares the detected voltage value with k times of the preset voltage threshold value; likewise, the analysis module 2 may also compare the detected current value with k times the preset current threshold. In this embodiment, a preset voltage threshold is taken as an example for description, for example, k may be set to be 1.25, and when it is detected that the voltage value of the output end of the current sharing control circuit is greater than 1.25 times of the voltage threshold of the output end of the current sharing control circuit, it may be determined that the hot standby power supply is overloaded. The detected voltage value is compared with the preset voltage threshold value which is 1.25 times, so that whether the power supply of the hot standby power supply is overloaded or not can be judged more accurately.
The overload protection device of the embodiment analyzes and compares whether the voltage value or the current value detected by the detection module 1 is larger than the voltage threshold or the current threshold of the output end of the current-sharing control circuit through the analysis module 2 to determine whether the hot standby power supply is overloaded or not, so that the power supply state of the hot standby power supply can be easily determined. In addition, whether the voltage value (or the current value) detected by the comparison detection module 1 is larger than k times of the preset voltage threshold value (or k times of the preset current threshold value) of the output end of the current-sharing control circuit or not is analyzed and compared by the analysis module 2 to determine whether the hot standby power supply is overloaded or not, so that the power supply state of the hot standby power supply can be known more accurately, frequent overload protection on the load is avoided, and the load can run stably.
Based on the above technical solution, optionally, the analysis module 2 in this embodiment may be further configured to calculate a power value output by the hot standby power supply according to the detected information, and determine that the hot standby power supply is overloaded when the power value output by the hot standby power supply is greater than a rated power of the load; or, the analysis module 2 may be further configured to calculate a current value output by the hot standby power supply according to the detected information, and determine that the hot standby power supply is overloaded when the current value output by the hot standby power supply is greater than a rated current of the load. Specifically, the information in this embodiment may be a voltage value or a current value. The analysis module 2 in this embodiment may calculate the power value output by the hot standby power according to the voltage value or the current value detected by the detection module 1, and determine whether the power value output by the hot standby power is greater than the rated power of the load; if yes, the hot standby power supply is overloaded. Similarly, the analysis module 2 in this embodiment may further calculate a current value output by the hot standby power supply according to the voltage value or the current value detected by the detection module 1, and determine whether the current value output by the hot standby power supply is greater than a rated current of the load; if yes, the hot standby power supply is overloaded.
In the overload protection device of the embodiment, the analysis module 2 calculates the power value or the current value output by the hot standby power supply according to the detected voltage value or the current value of the output end of the current sharing control circuit, so that whether the hot standby power supply is overloaded or not can be conveniently known by comparing the power value output by the hot standby power supply with the rated power of a load; similarly, whether the hot standby power supply is overloaded or not can be conveniently known by comparing the current value output by the hot standby power supply with the current magnitude of the load.
Based on the above technical solution, optionally, the processing module 3 in this embodiment may be further configured to turn off the hot standby power supply if the hot standby power supply is overloaded and the duration of the hot standby power supply in the power supply overload state is longer than the preset time. Specifically, in order to prevent the hot standby power supply from being overloaded instantaneously due to the influence of the external environment, the processing module 3 in this embodiment frequently performs overload protection on the load, and turns off the hot standby power supply when it is determined that the hot standby power supply is overloaded and the duration of the state in which the hot standby power supply is overloaded is longer than the preset time.
The overload protection device of the embodiment supplies power to the hot standby power supply through the processing module, and closes the hot standby power supply when the time that the hot standby power supply is in the power supply overload state is longer than the preset time, so that frequent power supply overload protection of the hot standby power supply can be reduced, the load can stably operate, and the reliability of the hot standby power supply can be improved.
Based on the above technical solution, optionally, the detection module 1 in this embodiment may also be configured to detect information output by the output end of the current-sharing control circuit according to a preset detection period. Specifically, when detecting the information at the output end of the current-sharing control circuit in the power module, the detection module 1 in this embodiment can detect according to a preset detection period, and does not need to continuously detect the information output by the output end of the current-sharing control circuit, thereby reducing the number of times of detection, and being beneficial to improving the detection efficiency.
The overload protection device of the embodiment detects the information output by the output end of the current-sharing control circuit according to the preset detection period through the detection module, so that the detection times can be reduced, and the detection efficiency of the detection module is improved.
In this embodiment, the representation entity of the detection module 1 in the overload protection apparatus may be a detection circuit; whereas the analysis module 2 and the processing module 3 may be integrated on one analysis processing circuit board. For example, the detection circuit may be composed of a follower circuit and an amplifier circuit. When the signal voltage is low and does not meet the voltage requirement of the analysis processing circuit board part, processing the detected voltage by using an amplifying circuit; in order to enable the detection circuit to have direct current amplification capacity, certain direct current bias can be added, so that the effective part of the signal can be amplified more effectively; when the voltage is higher and can meet the requirements of the analysis processing circuit board, only the follower circuit is needed to detect the voltage signal. The analysis processing circuit board can judge whether the hot standby power supply is in an overload state or not according to different loads obtained by the detection circuit, can be composed of an operational amplifier and a transistor, and can also be realized by various means such as a single chip microcomputer and programmable logic. The embodiment of the invention does not limit the representation entities of the detection module 1, the analysis module 2 and the processing module 3.
Fig. 5 is a schematic structural diagram of an embodiment of the hot standby power supply of the present invention. As shown in fig. 5, the hot standby power supply of this embodiment includes a plurality of power modules, the current sharing control circuits in each power module are connected to each other, and further includes an overload protection device 20, where the overload protection device 20 is an overload protection device in the embodiment of the overload protection device of the present invention; the detection module 201 of the overload protection device 20 is connected with the output end of the current-sharing control circuit of the power supply module, and the processing module 203 of the overload protection device 20 is connected with each power supply module. The specific structure of the overload protection device 20 in this embodiment can be found in the embodiment of the overload protection device of the present invention and the description of fig. 4, and is not described herein again. In this embodiment, the output terminals of the current-sharing control circuits in the power modules are connected together, so that the output information of each current-sharing control circuit is the same.
Specifically, the embodiment takes the example that the hot standby power supply includes the first power module 101 and the second power module 102 as an example. The power output terminals of the first power module 101 and the second power module 102 are connected together to supply power to the load 30, and the output terminal 1011 of the current sharing control circuit in the first power module 101 is connected with the output terminal 1021 of the current sharing control circuit in the second power module 102, so that the first power module 101 and the second power module 102 can share the required current of the load 30 on average. The overload protection apparatus 20 includes a detection module 201, an analysis module 202, and a processing module 203, which are sequentially connected together. The detection module 201 is respectively connected with the output end 1011 of the current-sharing control circuit in the first power module 101 and the output end 1021 of the current-sharing control circuit in the second power module 102 to detect a voltage value or a current value; the processing module 203 is connected to the first power module 101 and the second power module 102, respectively, so as to turn off the first power module 101 and the second power module 102 after determining that the hot standby power supply of the embodiment is overloaded. The hot standby power supply does not limit the number of the power supply modules.
According to the hot standby power supply provided by the embodiment of the invention, the voltage value or the current value of the output end of the current sharing control circuit of the power supply module is detected through the detection module in the overload protection device, the detected voltage value or current value is analyzed through the analysis module in the overload protection device to determine whether the power supply of the hot standby power supply is overloaded, and the processing module closes the power supply module in the hot standby power supply when the power supply of the hot standby power supply is overloaded, so that the defects of poor overload protection effect and low reliability of the hot standby power supply in the prior art are overcome, the power supply module can be effectively closed when the power supply of the hot standby power supply is overloaded, the load is effectively protected from being damaged, and the reliability of the hot standby.
Fig. 6 is a schematic structural diagram of an embodiment of the overload protection system according to the present invention. As shown in fig. 6, the overload protection system provided in the embodiment of the present invention includes a hot standby power supply 601 and a load 602, where current sharing control circuits in power supply modules in the hot standby power supply 601 are connected to each other; the overload protection device 603 is an overload protection device in an embodiment of the overload protection device of the present invention, and specific structures of the overload protection device 603 and the overload protection device in the embodiment of the overload protection device of the present invention can be referred to in the description of fig. 4 and fig. 5, which are not described herein again. The hot standby power supply 601 is connected with the load 602 and is used for supplying power to the load 602; one end of the overload protection device 603 is connected to the output end of the current sharing control circuit (not shown), and the other end of the overload protection device 603 is connected to the load 602.
Specifically, in the process of supplying power to the load 602, the hot standby power supply 601 in this embodiment can effectively protect the load 602 through the overload protection device 603, and prevent the load 602 from being damaged due to overload of the hot standby power supply 601. The overload protection system provided by the embodiment of the invention can be a high-performance storage system, a server with higher power supply requirement and other equipment. For example, a system embodiment of the present invention will be described with reference to a high performance storage system as an example. The load 602 in this embodiment may be a high-performance storage device such as an SSD, and the hot standby power supply 601 supplies power to the load 602. When the hot standby power supply 601 overloads the load 602, the overload protection device 603 turns off the hot standby power supply 601, thereby effectively protecting the load 602.
According to the overload protection system provided by the embodiment of the invention, the detection module of the overload protection device is used for detecting the information output by the output end of the current-sharing control circuit, the analysis module is used for determining whether the power supply of the hot standby power supply is overloaded or not according to the detected information, and the hot standby power supply is turned off when the power supply of the hot standby power supply is overloaded, so that the defects of poor overload protection effect and low reliability of the hot standby power supply in the prior art are overcome, and the power supply module can be effectively turned off when the power supply of the hot standby power supply is overloaded, so that the load is effectively protected from being damaged.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of load overload protection, comprising:
detecting information output by an output end of a current-sharing control circuit in a hot standby power supply of a load;
determining whether the hot standby power supply is overloaded for supplying power to a load according to the detected information;
and if the power supply of the hot standby power supply is overloaded, the hot standby power supply is closed.
2. The method according to claim 1, wherein before the detecting information of the output terminal of the current sharing control circuit in the hot standby power supply, the method further comprises:
setting information output by the output end of the current-sharing control circuit when a load is at rated power as a preset threshold value, wherein the information is a voltage value, and the preset threshold value is a preset voltage threshold value; or, the information is a current value, and the preset threshold is a preset current threshold;
the determining whether the hot standby power supply supplies power to the load according to the detected information comprises:
if the detected voltage value is larger than the preset voltage threshold value, determining that the hot standby power supply is overloaded; or, if the detected current value is greater than the preset current threshold value, determining that the hot standby power supply is overloaded.
3. The method according to claim 2, wherein if the detected voltage value is greater than the preset voltage threshold, determining that the hot standby power supply is overloaded; or, if the detected current value is greater than the preset current threshold, determining that the hot standby power supply is overloaded includes:
if the detected voltage value is larger than k times of the preset voltage threshold value, determining that the hot standby power supply is overloaded; or, if the detected current value is greater than k times of the preset current threshold value, determining that the hot standby power supply is overloaded; wherein the value range of k is 1-1.5.
4. The method of claim 1, wherein turning off the hot standby power supply if the hot standby power supply is overloaded comprises:
and if the power supply of the hot standby power supply is overloaded and the duration time of the hot standby power supply in the power supply overload state is longer than the preset time, closing the hot standby power supply.
5. An overload protection apparatus, comprising:
the detection module is used for detecting information output by the output end of the current-sharing control circuit in the hot standby power supply of the load;
the analysis module is used for determining whether the power supply of the hot standby power supply is overloaded or not according to the detected information;
and the processing module is used for closing the hot standby power supply if the power supply of the hot standby power supply is overloaded.
6. The overload protection device of claim 5, further comprising:
a setting module: and the current sharing control circuit is used for setting the information output by the output end of the current sharing control circuit as a preset threshold value when the load is at rated power.
7. Overload protection device according to claims 5-6, characterized in that: the information is a voltage value, and the preset threshold value is a preset voltage threshold value; or, the information is a current value, and the preset threshold is a preset current threshold;
when the information is a voltage value and the preset threshold is a preset voltage threshold, the analysis module is used for determining that the hot standby power supply is overloaded if the detected voltage value is greater than the preset voltage threshold; or,
when the information is a current value and the preset threshold value is a preset current threshold value, the analysis module is used for determining that the power supply of the hot standby power supply is overloaded if the detected current value is larger than the preset current threshold value.
8. The overload protection device of claim 7, wherein: if the detected voltage value is larger than the preset voltage threshold value, determining that the hot standby power supply is overloaded; or, if the detected current value is greater than the preset current threshold, determining that the hot standby power supply is overloaded includes:
if the detected voltage value is larger than k times of the preset voltage threshold value, the analysis module is used for determining that the hot standby power supply is overloaded; or,
if the detected current value is larger than k times of the preset current threshold value, the analysis module is used for determining that the hot standby power supply is overloaded; wherein the value range of k is 1-1.5.
9. The overload protection device of claim 5, wherein: the processing module is used for turning off the hot standby power supply when the hot standby power supply is overloaded and the duration time of the hot standby power supply in the power supply overload state is longer than the preset time.
10. An overload protection system comprises a load and a hot standby power supply, wherein current sharing control circuits in each power supply module in the hot standby power supply are connected with each other, and the overload protection system is characterized in that: further comprising an overload protection apparatus as claimed in any one of claims 5 to 9; the hot standby power supply is connected with the load and used for supplying power to the load; one end of the overload protection device is connected with the output end of the current-sharing control circuit, and the other end of the overload protection device is connected with the load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010115395A CN101752824A (en) | 2010-02-09 | 2010-02-09 | Overload protection method, overload protection device and system for load |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010115395A CN101752824A (en) | 2010-02-09 | 2010-02-09 | Overload protection method, overload protection device and system for load |
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| CN101752824A true CN101752824A (en) | 2010-06-23 |
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| CN201010115395A Pending CN101752824A (en) | 2010-02-09 | 2010-02-09 | Overload protection method, overload protection device and system for load |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543360A (en) * | 2013-10-29 | 2014-01-29 | 珠海许继芝电网自动化有限公司 | Method and system for monitoring repeated overload of power distribution network lines |
| CN106484022A (en) * | 2016-10-31 | 2017-03-08 | 广州视源电子科技股份有限公司 | Mainboard overvoltage protection method and system |
| CN107797047A (en) * | 2017-09-27 | 2018-03-13 | 深圳和而泰智能控制股份有限公司 | Load state detecting method, device and electronic equipment |
| CN107844185A (en) * | 2016-09-19 | 2018-03-27 | 华为数字技术（成都）有限公司 | A kind of method for managing power supply and device |
| CN109839525A (en) * | 2019-03-13 | 2019-06-04 | 深圳市鼎阳科技有限公司 | A kind of overpower protection method and protective device for electronic load |
| CN110318283A (en) * | 2019-07-16 | 2019-10-11 | 山鹰国际控股股份公司 | A kind of overload protective device for slurrying scalping |
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- 2010-02-09 CN CN201010115395A patent/CN101752824A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543360A (en) * | 2013-10-29 | 2014-01-29 | 珠海许继芝电网自动化有限公司 | Method and system for monitoring repeated overload of power distribution network lines |
| CN107844185A (en) * | 2016-09-19 | 2018-03-27 | 华为数字技术（成都）有限公司 | A kind of method for managing power supply and device |
| CN107844185B (en) * | 2016-09-19 | 2020-01-31 | 华为数字技术（成都）有限公司 | power supply management method and device |
| CN106484022A (en) * | 2016-10-31 | 2017-03-08 | 广州视源电子科技股份有限公司 | Mainboard overvoltage protection method and system |
| CN107797047A (en) * | 2017-09-27 | 2018-03-13 | 深圳和而泰智能控制股份有限公司 | Load state detecting method, device and electronic equipment |
| CN107797047B (en) * | 2017-09-27 | 2020-07-17 | 深圳和而泰智能控制股份有限公司 | Load state detection method and device and electronic equipment |
| CN109839525A (en) * | 2019-03-13 | 2019-06-04 | 深圳市鼎阳科技有限公司 | A kind of overpower protection method and protective device for electronic load |
| CN109839525B (en) * | 2019-03-13 | 2021-02-02 | 深圳市鼎阳科技股份有限公司 | Over-power protection method and protection device for electronic load |
| CN110318283A (en) * | 2019-07-16 | 2019-10-11 | 山鹰国际控股股份公司 | A kind of overload protective device for slurrying scalping |
| CN110318283B (en) * | 2019-07-16 | 2021-01-12 | 山鹰国际控股股份公司 | Overload protection system for pulping coarse screen |
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Application publication date: 20100623 |