CN211063332U - IPM overcurrent protection circuit, module and system for flywheel energy storage device - Google Patents

Abstract

The utility model relates to the technical field of IPM protection circuits, in particular to an IPM overcurrent protection circuit, a module and a system for a flywheel energy storage device. Among them, the IPM overcurrent protection system is suitable for 1500V subway track and 200KW flywheel energy storage device. The IPM overcurrent protection system includes: IPM overcurrent protection module, signal generation module, IPM module and line drive module. The line drive modules are respectively Connected with the IPM module, the signal generation module and the IPM overcurrent protection module, the signal generation module generates and outputs the first pulse signal and the second pulse signal, and the line driving module controls the first pulse according to the overcurrent protection signal output by the IPM overcurrent protection module Whether the signal and the second pulse signal are passed to the IPM module. Through the above method, when the IPM module is overcurrent, the continuous transmission of the pulse signal is blocked, so that it cannot be transmitted to the IPM module, so as to achieve the purpose of protecting the IPM module. Compared with the MCU controller, the device structure is simplified and the system reliability is improved. Security and Accuracy.

Description

IPM overcurrent protection circuit, module and system for flywheel energy storage device

technical field

The utility model relates to the technical field of IPM protection circuits, in particular to an IPM overcurrent protection circuit, a module and a system for a flywheel energy storage device.

Background technique

IPM (Intelligent Power Module) is an advanced new type of power switching device, which has the advantages of GTR (High Power Transistor) high current density, low saturation voltage and high voltage resistance, as well as MOSFET (Field Effect Transistor) high input impedance, high switching advantages of frequency and low drive power. IPM integrates logic, control, detection and protection circuits, which is easy to use and has a wide range of applications. It not only reduces the size and development time of the system, but also greatly enhances the reliability of the system and adapts to the development direction of today's power devices, such as modules. Integrated, composite and power integrated circuits (PICs) have received more and more attention in the field of power electronics.

As an important part of the control system, the IPM should pay special attention to the processing and protection of the abnormal working state of the IPM during the use process. It is passed to the main controller MCU, and the sampled data is compared and analyzed by programming the MCU, and then it is judged whether the circuit has overcurrent and overtemperature. This method requires the combination of software and hardware, which increases the difficulty and workload of development, and the price of the MCU is higher than that of other electronic components, which increases the cost.

In view of this, to overcome the above-mentioned defects in the prior art, it has become an urgent technical problem to be solved in the art to provide a new IPM overcurrent protection circuit, module and system for a flywheel energy storage device.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an IPM overcurrent protection circuit, a module and a system for a flywheel energy storage device in view of the above-mentioned defects of the prior art.

The purpose of this utility model can be realized through the following technical measures:

The embodiment of the present invention provides an IPM overcurrent protection circuit for a flywheel energy storage device, the IPM overcurrent protection circuit is connected with an IPM module, and the IPM module is provided with a first IGBT component and a second IGBT component , the first IGBT component is provided with a first Hall current sensor, the second IGBT component is provided with a second Hall current sensor, and the first Hall current sensor is used to collect the flow through the IPM module. The current signal of the first IGBT component is automatically converted into a first voltage value, the second Hall current sensor is used to collect the current signal flowing through the second IGBT component in the IPM module and automatically converted into a second voltage value, the The IPM overcurrent protection circuit includes: a signal input circuit module, a signal comparison circuit module and a signal output circuit module connected in sequence;

The signal input circuit module includes a first comparison chip, the negative input terminal of the first comparison chip is connected to the first Hall current sensor, and the positive input terminal of the first comparison chip is connected to the second Hall current sensor , the output end of the first comparison chip is connected to the signal comparison circuit module, the first comparison chip collects and compares the first voltage value and the second voltage value, and compares the first voltage value and the second voltage value. The larger voltage value among the voltage values is used as the input voltage value and transmitted to the signal comparison circuit module;

The signal comparison circuit module compares the input voltage value with a preset voltage value, and the signal output circuit module outputs an overcurrent protection signal according to the comparison result of the signal comparison circuit module.

According to an embodiment of the present invention, the signal input circuit module further includes an analog switch arranged at the output end of the first comparison chip, and the analog switch includes a signal input connected to the output end of the first comparison chip terminal, a signal output terminal connected to the signal comparison circuit module, a first input terminal connected to the negative input terminal of the first comparison chip, and a second input terminal connected to the positive input terminal of the first comparison chip.

According to an embodiment of the present invention, the signal comparison circuit module includes a second comparison chip and an adjustment circuit, a negative input terminal of the second comparison chip is connected to the adjustment circuit, and a positive input terminal of the second comparison chip is connected to the adjustment circuit. The terminal is connected to the signal output terminal, the output terminal of the second comparison chip is connected to the signal output circuit module, and the second comparison chip compares the input voltage value with the preset voltage value output by the adjustment circuit The comparison is performed, and the comparison result is outputted to the signal output circuit module.

According to an embodiment of the present invention, the adjustment circuit includes a first resistor and a second resistor, the negative input terminal of the second comparison chip is interconnected with one end of the first resistor and one end of the second resistor, and the first resistor The other end of the second resistor is grounded, and the other end of the second resistor is connected to the reference voltage generator.

According to an embodiment of the present invention, the signal comparison circuit module further includes a third resistor, one end of the third resistor is connected between the negative input terminal of the second comparison chip and the adjustment circuit, and the third resistor has a The other end is connected to the output end of the second comparison chip.

According to an embodiment of the present invention, the signal output circuit module includes two NOT gate chips connected in series in sequence.

An embodiment of the present invention provides an IPM overcurrent protection module for a flywheel energy storage device, wherein the IPM overcurrent protection module includes the IPM overcurrent protection circuit.

An embodiment of the present invention provides an IPM overcurrent protection system for a flywheel energy storage device, the IPM overcurrent protection system includes: the IPM overcurrent protection module, a signal generation module, an IPM module and a line driver module, the line driver module is respectively connected with the IPM module, the signal generation module, and the IPM overcurrent protection module, and the signal generation module is used to generate and output the first pulse signal and the second pulse signal. The overcurrent protection signal output by the IPM overcurrent protection module is in a low-level state, and the line driver module controls the first pulse signal and the second pulse signal to pass and transmit to the IPM module. The overcurrent protection signal output by the current protection module is in a high level state, and the line driving module controls to block the transmission of the first pulse signal and the second pulse signal to the IPM module.

According to an embodiment of the present invention, the line driver module includes a signal input pin, an enable pin and a signal output pin, the enable pin is connected to the IPM overcurrent protection module, and the input pin is connected to the IPM overcurrent protection module. The pin is connected to the signal generation module, and the output pin is connected to the IPM module. When the overcurrent protection signal is in a low level state, the first pulse signal and the second pulse signal pass through the The enable pin is transmitted to the IPM module, and when the overcurrent protection signal is in a high level state, the enable pin blocks the transmission of the first pulse signal and the second pulse signal to the IPM module.

According to an embodiment of the present invention, the IPM overcurrent protection system is suitable for a 1500V subway track and a 200KW flywheel energy storage device.

The IPM overcurrent protection circuit, module and system of the utility model used for the flywheel energy storage device are all composed of hardware. Compared with the system combining software and hardware, the safety and accuracy of the system are improved, and the efficiency of information processing is improved. There is also a significant improvement; through the above method, when the temperature of the IGBT component is overcurrent, the continuous transmission of the pulse signal is blocked, so that it cannot be transmitted to the IPM module, so as to achieve the purpose of protecting the IGBT component, and the line driver module acts as a switch. By outputting the overcurrent protection signal to the line driver module, and controlling the passing/blocking of the first pulse signal and the second pulse signal according to the level state of the overcurrent protection signal, compared with the MCU controller, the device structure is simplified and the number of The peripheral circuit required by the MCU controller does not require software programming, which reduces the task load and development difficulty of system development.

Description of drawings

1 is a schematic structural diagram of an IPM overcurrent protection circuit for a flywheel energy storage device of the present invention.

2 is a schematic structural diagram of an IPM overcurrent protection system for a flywheel energy storage device of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

In the following, many aspects of the present invention will be better understood with reference to the accompanying drawings. Features in the figures are not necessarily drawn to scale. Instead, emphasis is placed on clearly illustrating the components of the invention. Furthermore, like reference numerals indicate corresponding parts throughout the several views of the drawings.

The words "exemplary" or "illustrative" as used herein mean serving as an example, instance, or illustration. Any implementation described herein as "exemplary" or "illustrative" is not necessarily to be construed as preferred or advantageous over other implementations. All embodiments described below are exemplary embodiments provided to enable those skilled in the art to make and use examples of the disclosure and are not intended to limit the scope of the disclosure, which is defined by The claims are limited. In other instances, well-known features and methods have been described in detail so as not to obscure the invention. For the purposes of this description, the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal" and derivatives thereof will be oriented as in FIG. 1 of utility models. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary or the following detailed description. It should also be appreciated that the specific apparatus and processes illustrated in the drawings and described in the following specification are simple exemplary embodiments of the inventive concept defined in the appended claims. Therefore, specific dimensions and other physical characteristics related to the embodiments disclosed herein are not to be construed as limiting unless the claims expressly state otherwise.

An embodiment of the present invention provides an IPM overcurrent protection circuit for a flywheel energy storage device. FIG. 1 is a schematic structural diagram of an IPM overcurrent protection circuit for a flywheel energy storage device. Please refer to FIG. 1 . The IPM overcurrent protection circuit is connected to the IPM module 10. The IPM module 10 is provided with a first IGBT component (not shown in the figure) and a second IGBT component (not shown in the figure), and the first IGBT component is provided with a first IGBT component. The Hall current sensor 20, the second Hall current sensor 30 is arranged on the second IGBT component, and the first Hall current sensor 20 is used to collect the current signal flowing through the first IGBT component in the IPM module 10 and automatically convert it into a first voltage The second Hall current sensor 30 is used to collect the current signal flowing through the second IGBT component in the IPM module 10 and automatically convert it into a second voltage value. The IPM overcurrent protection circuit includes: signal input circuit modules 40 connected in sequence, Signal comparison circuit module 50 and signal output circuit module 60 .

In this embodiment, the signal input circuit module 40 includes a first comparison chip 401, the negative input terminal of the first comparison chip 401 and the first Hall current sensor 20, and the positive input terminal of the first comparison chip 401 and the second Hall The current sensor 30 is connected, the output end of the first comparison chip 401 is connected to the signal comparison circuit module 50, the first comparison chip 401 collects and compares the first voltage value and the second voltage value, and divides the first voltage value and the second voltage value into The larger voltage value is used as the input voltage value, and is transmitted to the signal comparison circuit module 50; the signal comparison circuit module 50 compares the input voltage value with the preset voltage value, and the signal output circuit module 60 is based on the comparison result of the signal comparison circuit module 50. Output overcurrent protection signal.

In this embodiment, the first Hall current sensor 20 converts the current signal flowing through the first IGBT component in the IPM module 10 into the first voltage value according to a certain ratio, and the second Hall current sensor 30 converts the current signal flowing through the IPM module 10 to the first voltage value. The current signal of the second IGBT component is converted into a second voltage value according to a certain ratio, the voltage value at TP1 is the first voltage value, the voltage value at TP2 is the second voltage value, the voltage value at TP1 and the voltage at TP2 The value increases as the current increases, the voltage value of TP1 is proportional to the current value, and the voltage value of TP2 is proportional to the current value.

Further, the signal input circuit module 40 also includes an analog switch 402 arranged at the output end of the first comparison chip 401 , and the analog switch 402 includes a signal input end (ie Vin end) connected to the output end of the first comparison chip 401 , and the signal The signal output terminal (ie the OUT terminal) connected to the comparison circuit module 50 , the first input terminal (ie the NC terminal) connected to the negative input terminal of the first comparison chip 401 , and the second input connected to the positive input terminal of the first comparison chip 401 terminal (ie, NO terminal). The analog switch 402 also includes a ground terminal (ie, a GND terminal) and a power terminal (ie, a Vcc terminal) connected to the reference voltage generator.

In this embodiment, when the first voltage value is greater than the second voltage value, the first comparison chip 401 outputs a low level to the analog switch 402, and when the signal input terminal is in a low level state, the signal output terminal is connected to the first input terminal When the first voltage value is lower than the second voltage value, the first comparison chip 401 outputs a high level to the analog switch 402, and when the signal input When the signal output terminal is in a high level state, the signal output terminal is connected to the second input terminal, and the second voltage value is transmitted to the signal comparison circuit module 50 as the input voltage value.

Further, the signal comparison circuit module 50 includes a second comparison chip 501 and an adjustment circuit 502, the second comparison chip 501 is grounded and connected to the reference voltage generator, the negative input terminal of the second comparison chip 501 is connected to the adjustment circuit 502, the second The positive input terminal of the comparison chip 501 is connected to the signal output terminal, the output terminal of the second comparison chip 501 is connected to the signal output circuit module 60 , and the second comparison chip 501 compares the input voltage value with the preset voltage value output by the adjustment circuit 502 . , and output the comparison result to the signal output circuit module 60 . When the input voltage value is greater than or equal to the preset voltage value, the second comparison chip 501 outputs a high level to the signal output circuit module 60; when the input voltage value is less than the preset voltage value, the second comparison chip 501 outputs a high level to the signal output circuit module 60 output low level.

Further, the adjustment circuit 502 includes a first resistor 5021 and a second resistor 5022. The negative input end of the second comparison chip 501 is interconnected with one end of the first resistor 5021 and one end of the second resistor 5022, and the other end of the first resistor 5021 is interconnected. Ground, and the other end of the second resistor 5022 is connected to the reference voltage generator. By adjusting the first resistor 5021 and the second resistor 5022, the adjustment circuit 502 adjusts the voltage value at TP3 to the voltage value corresponding to the overcurrent, that is, the preset voltage value.

Further, the signal comparison circuit module 50 further includes a third resistor 503, one end of the third resistor 503 is connected between the negative input end of the second comparison chip 501 and the adjustment circuit 502, and the other end of the third resistor 503 is connected to the second Compare the output of chip 501 . The third resistor 503 is used to amplify the comparison result output by the second comparison chip 501.

Further, the signal output circuit module 60 includes two NOT gate chips 601 connected in series in sequence. The NOT gate chip 601 is used for enhancing and stabilizing the level signal. When the second comparison chip 501 outputs a low level to the signal output circuit module 60, the overcurrent protection signal output by the signal output circuit module 60 is the enhanced and stabilized low level signal. When the second comparison chip 501 outputs a high level to the signal output circuit module 60, the overcurrent protection signal output by the signal output circuit module 60 is an enhanced and stabilized high level, indicating that the signal is abnormal.

An embodiment of the present invention provides an IPM overcurrent protection module for a flywheel energy storage device. The IPM overcurrent protection module includes the above-mentioned IPM overcurrent protection circuit. The IPM overcurrent protection circuit has been described in detail above, and is described here. No longer.

The embodiment of the present invention provides an IPM overcurrent protection system for a flywheel energy storage device, and the IPM overcurrent protection system is suitable for a 1500V subway track and a 200KW flywheel energy storage device. FIG. 2 is a schematic structural diagram of an IPM overcurrent protection system for a flywheel energy storage device. Please refer to FIG. 2. The IPM overcurrent protection system includes: the above-mentioned IPM overcurrent protection module 1, a signal generation module 2, an IPM module 3 and Line driver module 4, the line driver module 4 is respectively connected with the IPM module 3, the signal generation module 2, and the IPM overcurrent protection module 1, and the signal generation module 2 is used to generate and output the first pulse signal and the second pulse signal. The overcurrent protection signal output by the current protection module 1 is in a low level state, and the line driver module 4 controls the first pulse signal and the second pulse signal to pass and transmit to the IPM module 3. When the overcurrent protection output by the IPM overcurrent protection module 1 When the signal is in a high level state, the line driving module 4 controls to block the transmission of the first pulse signal and the second pulse signal to the IPM module 3 .

Further, the line driver module 4 includes a signal input pin, an enable pin and a signal output pin, the enable pin is connected with the IPM overcurrent protection module 1, the input pin is connected with the signal generation module 2, and the output pin is connected with the IPM overcurrent protection module 1. The IPM module 3 is connected. When the overcurrent protection signal is in a low level state, the first pulse signal and the second pulse signal are transmitted to the IPM module through the enable pin. When the overcurrent protection signal is in a high level state, the enable The pin blocks the transmission of the first pulse signal and the second pulse signal to the IPM module.

The IPM overcurrent protection circuit, module and system of the utility model used for the flywheel energy storage device are all composed of hardware. Compared with the system combining software and hardware, the safety and accuracy of the system are improved, and the efficiency of information processing is improved. There is also a significant improvement; through the above method, when an overcurrent occurs in the IPM module 3, the continuous transmission of the pulse signal is blocked, so that it cannot be transmitted to the IPM module 3, so as to achieve the purpose of protecting the IGBT components on the IPM module 3, and the line driver module 4 Acting as a switch, by outputting the overcurrent protection signal to the line driver module 4, it controls the passing/blocking of the first pulse signal and the second pulse signal according to the level state of the overcurrent protection signal, compared with the MCU controller , simplifies the structure of the device, reduces the peripheral circuits required by the MCU controller, and at the same time does not require software programming, reducing the workload and difficulty of system development.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (10)

1. An IPM overcurrent protection circuit for a flywheel energy storage device, characterized in that, this IPM overcurrent protection circuit is connected with an IPM module, and the IPM module is provided with a first IGBT assembly and a second IGBT assembly, so The first IGBT component is provided with a first Hall current sensor, the second IGBT component is provided with a second Hall current sensor, and the first Hall current sensor is used to collect the first Hall current sensor in the IPM module. The current signal of the IGBT component is automatically converted into a first voltage value, and the second Hall current sensor is used to collect the current signal flowing through the second IGBT component in the IPM module and automatically convert it into a second voltage value. The flow protection circuit includes: a signal input circuit module, a signal comparison circuit module and a signal output circuit module connected in sequence; The signal input circuit module includes a first comparison chip, the negative input terminal of the first comparison chip is connected to the first Hall current sensor, and the positive input terminal of the first comparison chip is connected to the second Hall current sensor , the output end of the first comparison chip is connected to the signal comparison circuit module, the first comparison chip collects and compares the first voltage value and the second voltage value, and compares the first voltage value and the second voltage value. The larger voltage value among the voltage values is used as the input voltage value and transmitted to the signal comparison circuit module; The signal comparison circuit module compares the input voltage value with a preset voltage value, and the signal output circuit module outputs an overcurrent protection signal according to the comparison result of the signal comparison circuit module. 2 . The IPM overcurrent protection circuit according to claim 1 , wherein the signal input circuit module further comprises an analog switch arranged at the output end of the first comparison chip, and the analog switch includes a A signal input terminal connected to the output terminal of the comparison chip, a signal output terminal connected to the signal comparison circuit module, a first input terminal connected to the negative input terminal of the first comparison chip, and a first input terminal connected to the first comparison chip The second input of the positive input. 3 . The IPM overcurrent protection circuit according to claim 1 , wherein the signal comparison circuit module comprises a second comparison chip and an adjustment circuit, and the negative input terminal of the second comparison chip is connected to the adjustment circuit. 4 . , the positive input terminal of the second comparison chip is connected to the signal output terminal, the output terminal of the second comparison chip is connected to the signal output circuit module, and the second comparison chip compares the input voltage value with The preset voltage value output by the adjustment circuit is compared, and the comparison result is output to the signal output circuit module. 4 . The IPM overcurrent protection circuit according to claim 3 , wherein the adjustment circuit comprises a first resistor and a second resistor, and the negative input end of the second comparison chip is connected to one end of the first resistor and a second resistor. 5 . One end of the two resistors is interconnected, the other end of the first resistor is grounded, and the other end of the second resistor is connected to the reference voltage generator. 5 . The IPM overcurrent protection circuit according to claim 4 , wherein the signal comparison circuit module further comprises a third resistor, and one end of the third resistor is connected to the negative input terminal of the second comparison chip and the Between the adjustment circuits, the other end of the third resistor is connected to the output end of the second comparison chip. 6 . The IPM overcurrent protection circuit according to claim 1 , wherein the signal output circuit module comprises two NOT gate chips connected in series in sequence. 7 . 7 . An IPM overcurrent protection module for a flywheel energy storage device, wherein the IPM overcurrent protection module comprises the IPM overcurrent protection circuit according to any one of claims 1 to 6 . 8. An IPM overcurrent protection system for a flywheel energy storage device, wherein the IPM overcurrent protection system comprises: an IPM overcurrent protection module as claimed in claim 7, a signal generation module, an IPM module and a A line driver module, the line driver module is respectively connected with the IPM module, the signal generation module, and the IPM overcurrent protection module, and the signal generation module is used to generate and output a first pulse signal and a second pulse signal , when the overcurrent protection signal output by the IPM overcurrent protection module is in a low level state, the line driver module controls the first pulse signal and the second pulse signal to pass and transmit to the IPM module. The overcurrent protection signal output by the IPM overcurrent protection module is in a high level state, and the line driving module controls to block the transmission of the first pulse signal and the second pulse signal to the IPM module. 9. IPM overcurrent protection system according to claim 8, is characterized in that, described line driver module comprises signal input pin, enable pin and signal output pin, described enable pin and described IPM The overcurrent protection module is connected, the input pin is connected with the signal generation module, the output pin is connected with the IPM module, when the overcurrent protection signal is in a low level state, the first pulse The signal and the second pulse signal are transmitted to the IPM module through the enable pin. When the overcurrent protection signal is in a high level state, the enable pin blocks the first pulse signal and the second pulse signal. A two-pulse signal is passed to the IPM module. 10 . The IPM overcurrent protection system according to claim 9 , wherein the IPM overcurrent protection system is suitable for a 1500V subway track and a 200KW flywheel energy storage device. 11 .

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