KR101495505B1 - Apparatus for preventing momentary power failure and abnormal voltage for power supply - Google Patents

Abstract

If an AC voltage is input to the power supply and an abnormal voltage such as a momentary power loss, an overvoltage or a low voltage occurs, the AC output power is cut off for a predetermined period of time to protect the corresponding electronic device using the power supply from an electric shock . That is, when the AC input voltage is supplied immediately after the instantaneous power failure, the corresponding electronic device can be prevented from operating abnormally, and the continuous equipment function can be performed. In addition, when the AC input voltage is supplied, There is provided an instantaneous power failure and abnormal voltage prevention device for a power supply device capable of preventing breakage of the electronic device and preventing the life span of the electronic device from being shortened.

Description

TECHNICAL FIELD [0001] The present invention relates to an instantaneous power failure and an abnormal voltage prevention device for a power supply device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instantaneous power failure and an abnormal voltage prevention apparatus for a power supply apparatus, and more particularly, to an apparatus and a method for preventing an instantaneous power failure, To an instantaneous power failure and an abnormal voltage prevention device for a power supply device capable of protecting a corresponding electronic device using the power supply device from an electric shock by shutting off the AC output power when a power failure occurs.

There are two types of power supply systems of computers according to the prior art, that is, a power supply system used in an AT (Advanced Technology) main board and a power supply system used in an ATX (Advanced Technology Extended) main board.

The power supply system used in such an AT main board has two states of a power switch (ON) and an OFF (OFF), and is directly supplied with power when the switch is on, Power is cut off.

However, ATX main board controls the power supply from the main board. Since the power control is edge triggered, the main board recognizes the moment when the power switch is turned on, To supply power.

On the other hand, the AT mainboard is continuously powered when the power switch is on, so if the computer is turned off after the power failure and then the power is supplied again, the computer will automatically boot up. However, Since the computer is booted by the trigger signal of the switch on, the power is turned off after the power supply is cut off. Even if the power is supplied again, there is no trigger signal due to the power switch being turned on. It does not. Therefore, the user must operate the power switch to reboot the computer.

1 is a block diagram showing a power supply system employed in an ATX board according to the related art.

Referring to FIG. 1, a power supply system employed in a conventional ATX board includes a power switch 13 for generating a trigger signal, a power supply 12 for supplying power, And an ATX main board 11. Here, only when the power switch 13 is pressed, the power supply 12 is turned on.

In the power supply system employed in the ATX board according to the related art, when the AC input voltage is connected, power is supplied from the ATX main board 11 to the ATX main board 11 through the power supply unit 12, Controls the apparatus 12 so that the power supply 12 is not operated until the trigger signal by the power switch 13 is turned on.

At this time, when the power switch 13 is turned on, a trigger signal at the moment when the power switch 13 is turned on is transmitted to the ATX main board 11. Accordingly, the ATX main board 11 operates the power supply 12 by the trigger signal, and power is supplied to the ATX main board 11.

The power supply system employed in the ATX board according to the prior art requires that the power supply 12 is operated only when a trigger signal by ON of the power switch 13 is inputted so that power is supplied to the ATX main board 11 Therefore, even if the computer is turned off and the power is supplied again, the computer can not be booted until the user operates the power switch (13).

On the other hand, Korean Patent Laid-Open Publication No. 2001-56419 discloses a computer power control circuit, which will be described with reference to FIG.

2 is a block diagram showing a power supply system employing a power control circuit for a computer according to a conventional technique.

Referring to FIG. 2, a power supply system employing a power control circuit for a computer according to a related art has a power switch 23 and a power supply 22 connected to the ATX main board 21, The output terminal of the power source control circuit 23 and the output of the power source control circuit 24 are connected together. Also, the connection between the power supply device 22 and the power supply control circuit 24 can be selected by using a jumper 25 or the like to select whether to use the operation of the power supply control circuit 24. [

In the case of a power supply system employing a power supply control circuit for a computer according to the prior art, the basic on / off operation is performed by the power switch 23. [ However, when the power source Vcc is supplied again after the computer is turned off due to sudden power interruption such as a power failure, the power control signal of 0 of the power control circuit 24 is initially output. The power supply control signal serves as a trigger signal by turning on the power switch 23. The ATX main board 21 operates the power supply device 22 by the power supply control signal to supply the power supply Vcc The computer automatically starts booting.

According to the power supply system employing the power control circuit for a computer according to the related art, power is shut off due to power failure or the like in a power supply system employing an edge trigger type power switch, A power supply control signal corresponding to the power supply is generated to automatically cause the computer to boot.

Generally, a power supply device is a circuit that converts an input voltage to a voltage of a desired level at a plurality of output terminals and outputs the converted voltage. When an input voltage is abnormal, an abnormal voltage protection Circuit.

A conventional abnormal voltage protection circuit is connected to a microcomputer for detecting an input voltage input to the power supply, and the input voltage is measured. If the input voltage is higher or lower than the predetermined reference voltage, So as to protect the power supply from an abnormal voltage.

On the other hand, as another prior art, Korean Patent No. 10-828738 discloses an invention titled " abnormal voltage protection circuit of power supply device ", which will be described with reference to Fig.

3 is a circuit diagram schematically showing an abnormal voltage protection circuit of a power supply device according to a conventional technique.

Referring to FIG. 3, the abnormal voltage protection circuit of the power supply according to the related art includes a half-wave rectifying diode D1 for half-wave rectifying the AC voltage supplied to the system; A zener diode (ZD2) for receiving a half-wave rectified voltage from the half-wave rectifying diode (D1) and conducting a voltage portion exceeding a breakdown voltage to output a voltage having a predetermined duty; A photodiode driven by a voltage output from the zener diode ZD2 and an opto-coupler electrically separated from the photodiode and including a phototransistor that receives an optical signal of the photodiode and is controlled in on / off state PC); And a duty value of a pulse signal to be inputted in accordance with the ON / OFF state of the phototransistor is received and a voltage of a predetermined level is applied from a constant voltage source when the phototransistor is in a turn-on state, And a microcomputer 30 for controlling the microcomputer.

Here, the microcomputer 30 sets a duty value within a predetermined range as a reference value, and blocks each component when the duty value of the input pulse signal exceeds or falls below a reference value.

According to the abnormal voltage protection circuit of the power supply device according to the prior art, since the circuit can be safely protected from the abnormal input voltage even by a simple circuit, the circuit configuration is simplified and the instantaneous power failure test or the like is performed The operation of the circuit can be precisely blocked even in a very short period of a static electricity state.

As described above, in the ATX main board, the power supply device is controlled by the main board. Since the main board senses a signal at the moment when the power switch is turned on to operate the power supply device to supply power, Power is not supplied to the ATX main board.

In addition, the power supplied to public institutions or offices is supplied in a stable manner, but equipment installed on the roadside may be supplied with unsafe power depending on the site. Especially, if there are many construction sites in U-CITY construction site and nearby, there will be many momentary power outages, and industrial PCs or general PCs that receive power supply due to such momentary power failure will continue to operate according to the instantaneous power failure time, A system reboot or system operation error may occur.

If the device is rebooted, it does not have a big problem because it performs a continuous function. However, if a system operation error such as ATX power supply OFF occurs, the device can not perform the continuous function. This is because when the power supply of the ATX main board is re-applied during a load discharge, it fails to generate a power good signal and can not operate the power supply.

This momentary power outage does not only affect the power supply, it can have a significant impact on the equipment that is servicing continuously. For example, if the device is a device that provides information through a TV, a method of supplying an input channel of video and audio is stored, and when the power is turned off and then on again, the channel is provided as a fixed channel . At this time, video and audio input terminals are wired, HDMI, USB, component, composite, etc. When the power is off, the last input terminal is memorized. However, if a momentary power failure occurs, the TV may not be able to operate normally.

In addition, most of the power supplied to the equipment in the field is constantly supplied, but voltage drop due to the connected length, overvoltage or undervoltage due to abnormal operation of the transformer may occur. In this case, the generated overvoltage and undervoltage can cause abnormal operation of the power supply used in the equipment. If such abnormal operation occurs, the use of the equipment may be greatly hindered. In addition, there is a problem that not only the symptom of abnormal equipment at the moment but also the failure of the relevant equipment may occur, and the useful life may also be shortened.

According to the conventional technology, when the AC input voltage is supplied immediately after the instantaneous power failure, the corresponding equipment can operate abnormally, and the equipment using the power supply device from the electric shock is affected .

In order to solve the above-described problem, it is necessary to operate the power switch again on the corresponding equipment installed on the site to turn off the power supply for a predetermined time, for example, 5 seconds or more, However, there is a problem that the power switch must be directly operated again.

Korean Patent No. 10-828738 filed on Sep. 29, 2006, entitled "Power supply over voltage protection circuit" Korean Patent No. 10-790521 filed on Jun. 28, 2006, entitled " Korean Patent Publication No. 2001-56419 (published on July 4, 2001), entitled "Power Control Circuit for Computer" Korean Patent No. 10-439483 filed on August 2, 2001, entitled " Korean Patent No. 10-392538 filed on September 7, 2002, entitled "Power Supply Device" Korean Patent Application No. 2008-9593 (published on January 29, 2008), entitled "Apparatus and Method for Powering Computer and Electrical Equipment" Korean Registered Utility Model No. 20-426036 (Filing Date: June 2, 2006), Name of Design: "Instantaneous Static Compensator"

According to an aspect of the present invention, there is provided a power supply apparatus for supplying power to a power supply apparatus, the apparatus comprising: The present invention is to provide an instantaneous power failure and abnormal voltage prevention device for a power supply device that can protect a corresponding electronic device using the device from an electric shock.

It is another object of the present invention to provide an instantaneous power failure and abnormal voltage prevention device for a power supply device that can prevent breakage of a corresponding electronic device when an overvoltage or a low voltage is generated when an AC input voltage is supplied, .

According to an aspect of the present invention, there is provided an instantaneous power failure and an abnormal voltage prevention device for a power supply device, including: an instantaneous power failure and an abnormal power failure for a power supply device for protecting a power supply device when an AC input voltage is input; An apparatus for voltage prevention, comprising: an input voltage sensing unit for sensing whether an AC input voltage is input; An output power control unit for controlling the AC input voltage to be supplied to the AC power supply to the power supply unit; A power supply for applying the AC output voltage after a predetermined time delay to supply the AC input voltage to prevent an abnormal operation of a corresponding electronic device supplied with power through the power supply device when a rated voltage is applied after an instantaneous power failure, A control processor; When the AC input voltage is lower than or equal to the allowable voltage for a predetermined period of time, it is determined that the AC input voltage is a low voltage or an overvoltage, and the AC output power is cut off to prevent the corresponding electronic device from performing an abnormal operation. An abnormal voltage sensing and blocking unit to be interrupted; And an operation status display unit for displaying an AC input through an LED or displaying an AC output control so as to confirm an operation state of the AC input voltage and the AC output power supply, When the input voltage is input, when the abnormal voltage of the instantaneous power failure, the overvoltage or the low voltage occurs, the AC output power is cut off for a predetermined power application delay time to protect the corresponding electronic device using the power supply device from the electric shock .

Here, the power supply delay time delayed by the power control processor may be selected from 6 seconds or 12 seconds using a slide switch and a delay time setting timer.

The abnormal voltage sensing and blocking unit detects a change in the AC input voltage and determines that the AC input voltage is lower than a permissible voltage for a predetermined period of time so that the AC output power supplied to the power supply unit is cut off. Sensing and blocking portions; And an overvoltage detection and blocking unit that detects a change in the AC input voltage and determines the overvoltage when the AC input voltage exceeds the allowable voltage for a predetermined time and blocks the AC output power supplied to the power supply unit have.

If the AC input voltage exceeds 264 V ± 5% and lasts for 10 msec or more by detecting a change in the AC input voltage, the overvoltage detection and blocking unit determines that the overvoltage is present and cuts off the AC output power, The power supply is stopped so as not to perform the operation, and when the AC input voltage reaches the allowable range of AC176V to 264V, the output power source controller supplies power to the corresponding electronic device.

When the AC input voltage is less than 176 V ± 5% and lasts for more than 10 ms, the low voltage detection and breaking unit determines that the AC input voltage is low and cuts off the AC output power, When the AC input voltage reaches the allowable range of AC 176V to 264V, the output power controller supplies power to the corresponding electronic device.

Here, the output power control unit controls the supply of the AC input voltage to the AC output power source using the TRIAC, and uses the AC input voltage as the AC output power source so that an additional control line and a load line are not required .

Here, the operation state display unit may include: an AC input display LED that is turned on when the AC input voltage is applied; And an AC output control LED that is turned on when an AC output power control function is activated when an instantaneous power failure or an abnormal power supply is applied to the AC input voltage.

Here, when the AC input voltage of the AC input voltage range is applied, the AC input indication LED is turned on and the AC output control LED is not turned on.

According to the present invention, when an AC input voltage is input to a power supply device and an abnormal voltage of an instantaneous power failure, an overvoltage, or a low voltage occurs, the corresponding AC power is cut off for a predetermined time, . That is, when the AC input voltage is supplied immediately after the instantaneous power failure, the electronic device can be prevented from operating abnormally, and the continuous equipment function can be performed.

According to the present invention, it is possible to prevent breakage of a corresponding electronic device when an overvoltage or a low voltage is generated when an AC input voltage is supplied, and to prevent a life span of the electronic device from being shortened.

Industrial Applicability According to the present invention, it is possible to reduce the replacement cost and the maintenance time of a corresponding electronic device due to a reduction in the defects of the electronic device used in the field, and reduce the labor cost due to the replacement of the electronic device.

1 is a block diagram showing a power supply system employed in an ATX board according to the related art.
2 is a block diagram showing a power supply system employing a power control circuit for a computer according to a conventional technique.
3 is a circuit diagram schematically showing an abnormal voltage protection circuit of a power supply device according to a conventional technique.
4 is a block diagram showing a state where the instantaneous power failure and abnormal voltage prevention device for a power supply unit according to the embodiment of the present invention is coupled to a power supply device.
5 is a block diagram of an instantaneous power failure and abnormal voltage prevention device for a power supply according to an embodiment of the present invention.
6 is a circuit diagram of an input voltage sensing unit in an instantaneous power failure and abnormal voltage prevention apparatus for a power supply according to an embodiment of the present invention.
FIG. 7 is a circuit diagram of an output power source control unit and an abnormal voltage sensing / breaking unit in the instantaneous power failure and abnormal voltage prevention apparatus for a power supply according to the embodiment of the present invention.
8 is a circuit diagram of a power control processor in an instantaneous power failure and abnormal voltage prevention apparatus for a power supply according to an embodiment of the present invention.
9 is a view for explaining delay time driving of the instantaneous power failure and abnormal voltage prevention apparatus for a power supply according to the embodiment of the present invention.
10A and 10B are views showing the external appearance of the instantaneous power failure and abnormal voltage prevention device for the power supply unit and the PCB board according to the embodiment of the present invention, respectively.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the term "part" or the like, as described in the specification, means a unit for processing at least one function or operation, and may be implemented by hardware, software, or a combination of hardware and software.

[System equipped with instantaneous power failure and abnormal voltage prevention device 100 for power supply device]

4 is a block diagram showing a state where the instantaneous power failure and abnormal voltage prevention device for a power supply unit according to the embodiment of the present invention is coupled to a power supply device.

Referring to FIG. 4, the instantaneous power failure and abnormal voltage prevention device 100 for a power supply according to the embodiment of the present invention is installed at the front end of the power supply device 220.

When an AC input voltage, for example, AC 220 V, which is a commercial power source is connected, power is supplied to the corresponding electronic device 210 through the power supply 220, for example, the ATX main board, The power supply unit 220 does not operate until the trigger signal by the power switch 230 is turned on by controlling the power supply unit 220. [ At this time, when the power switch 230 is turned on, a trigger signal at the moment when the power switch 230 is turned on is transmitted to the ATX main board 210. Accordingly, the ATX main board 210 operates the power supply unit 220 according to the trigger signal, and power is supplied to the ATX main board 210. At this time, the power supply 220 may be, for example, a Switching Mode Power Supply (SMPS).

When the AC input voltage is stabilized again, the instantaneous power failure and abnormal voltage prevention apparatus 100 for a power supply according to the embodiment of the present invention supplies the AC output power to the power supply after a certain period of time, for example, about 6 seconds or 12 seconds To the device 220 so that the electronic device 210 can operate at a stable power source. When the AC input voltage is directly supplied to the electronic device 210 after the instantaneous power failure, the power is applied to the corresponding electronic device 210 by a predetermined time delay in order to prevent the corresponding electronic device 210 from operating abnormally 210 to return to the original state.

For example, when power is re-applied after turning off the power supply for a certain period of time after an instantaneous power failure or an abnormal voltage is generated in the electronic device 210, for example, an ATX main board, The electronic device 210 can operate normally. Accordingly, the instantaneous power failure and abnormal voltage prevention device 100 for a power supply according to the embodiment of the present invention can supply power to the electronic device 210 after a predetermined time even if an instantaneous power failure occurs for a short period of time .

The instantaneous power failure and abnormal voltage prevention device 100 for the power supply according to the embodiment of the present invention is installed at the front end of the power supply device 220 so that when the AC input voltage is input to the power supply device 220, For example, 6 seconds or 12 seconds, by selectively cutting off the AC output power for a predetermined time, for example, 6 seconds or 12 seconds, when the overvoltage or overvoltage of the overvoltage or undervoltage occurs, . That is, when the AC input voltage is supplied immediately after the instantaneous power failure, the electronic device 210 can be prevented from operating abnormally, and the continuous equipment function can be performed. In addition, the instantaneous power failure and abnormal voltage prevention device 100 for a power supply according to an embodiment of the present invention prevents breakage of a corresponding electronic device upon occurrence of an overvoltage or a low voltage at the time of AC input voltage supply, can do.

[Instantaneous power failure and abnormal voltage prevention device (100) for power supply device)

5 is a block diagram of an instantaneous power failure and abnormal voltage prevention device for a power supply according to an embodiment of the present invention.

5, an instantaneous power failure and abnormal voltage prevention apparatus 100 for a power supply according to an embodiment of the present invention includes an input voltage sensing unit 110, an output power control unit 120, a power control processor 130, An abnormal voltage sensing and blocking unit 140, and an operation status display unit 150. [

The input voltage sensing unit 110 senses whether an AC input voltage is input. Here, the specific circuit of the input voltage sensing unit 110 will be described later with reference to FIG.

The output power control unit 120 controls the supply of the AC input voltage to the AC output power using TRIAC (TRIODE OF SWITCH) 121, for example, as shown in FIG. Here, a specific circuit of the output power controller 120 will be described later with reference to FIG.

The power control processor 130 is for preventing an abnormal operation of the electronic device when a rated voltage is applied after a momentary power failure, for example, for 10 msec or more, and the power control processor 130 AC input power is applied after delaying the supply of AC input voltage by a predetermined time. At this time, the power application delay time can be selectively delayed for 6 seconds or 12 seconds by using the slide switch 131 shown in FIG. Here, a specific circuit of the power control processor 130 will be described later with reference to FIG.

The abnormal voltage sensing and blocking unit 140 includes an overvoltage sensing and blocking unit and a low voltage sensing and blocking unit. For example, the low voltage sensing and blocking unit senses a change in the AC input voltage so that the AC input voltage is less than 176 V ± 5% , It is judged that the voltage is low and the AC output power is cut off and the power supply is stopped so that the corresponding electronic device does not perform the abnormal operation. At this time, when the AC input voltage reaches the allowable range of AC176V to AC264V, the output power control unit 120 supplies power to the corresponding electronic apparatus.

Also, the overvoltage detecting and breaking unit senses the change of the AC input voltage, and when the AC input voltage exceeds 264 V ± 5% and lasts for 10 msec or more, it is determined that the overvoltage is detected and the AC output power is cut off, Stop the power supply to prevent it from performing. Thereafter, when the AC input voltage reaches the allowable range of AC176V to 264V, the output power controller 120 supplies power to the corresponding electronic device. Here, a specific circuit of the abnormal voltage sensing and blocking unit 140 will be described later with reference to FIG.

10A, the operation status display unit 150 includes an AC input display LED 151 and an AC output control LED 152. The operation status display unit 150 displays an AC input through an LED or an AC Display output control. For example, when the AC input voltage is applied, the AC input display LED 151 is turned on. When the AC input voltage is applied to the AC input voltage, The LED 152 is turned on. If the AC input voltage of the AC input voltage range is applied, the AC input indicating LED 151 is turned on but the AC output controlling LED 152 is not turned on.

As a result, according to the instantaneous power failure and abnormal voltage prevention apparatus 100 for a power supply according to the embodiment of the present invention, when a power source outside the allowable range of the AC input voltage is applied, , And when normal power is supplied, power is supplied to the corresponding electronic device again so as to perform a normal function.

6 is a circuit diagram of an input voltage sensing unit in the instantaneous power failure and abnormal voltage prevention apparatus for a power supply according to an embodiment of the present invention.

6, in the instantaneous power failure and abnormal voltage prevention apparatus for a power supply according to an exemplary embodiment of the present invention, the input voltage sensing unit 110 senses an AC input voltage by the photocouplers PC1A and PC1B, If the AC input voltage is detected, it is connected to the abnormal voltage sensing and blocking unit 140 through the A line.

Meanwhile, FIG. 7 is a circuit diagram of an output power source control unit and an abnormal voltage sensing / breaking unit in the instantaneous power failure and abnormal voltage prevention apparatus for a power supply device according to an embodiment of the present invention.

7, in the instantaneous power failure and abnormal voltage prevention apparatus for a power supply according to the embodiment of the present invention, the output power source control unit 120 of the output power source control unit 120 includes, for example, (TRIODE OF SWITCH) 121 to control the supply of the AC input voltage to the AC output power supply. At this time, the output power controller 120 can use the AC input voltage as an AC output power source, so that an additional control line and a load line are not required.

In the instantaneous power failure and abnormal voltage prevention apparatus for a power supply according to the embodiment of the present invention, the abnormal voltage sensing and blocking unit 140 includes an overvoltage sensing and blocking unit and a low voltage sensing and blocking unit.

Specifically, when the AC input voltage is less than 176V ± 5% and lasts for more than 10ms by sensing the change of AC input voltage, the low voltage detection and blocking unit determines that the AC input voltage is low and cuts off the AC output power. Stop the power supply to prevent it from performing. At this time, when the AC input voltage reaches the allowable range of AC176V to AC264V, the output power control unit 120 supplies power to the corresponding electronic apparatus. For example, as shown in Fig. 8, the comparator U1 compares the upper and lower limits of the allowable voltage of AC176V to 264V with the input AC input voltage, detects whether the AC input voltage is within the allowable voltage range of AC176V to 264V , The power supply is cut off if the AC input voltage is outside the range of AC176V to 264V.

Also, the overvoltage detecting and breaking unit senses the change of the AC input voltage, and when the AC input voltage exceeds 264 V ± 5% and lasts for 10 msec or more, it is determined that the overvoltage is detected and the AC output power is cut off, Stop the power supply to prevent it from performing. Thereafter, when the AC input voltage reaches the allowable range of AC176V to 264V, the output power controller 120 supplies power to the corresponding electronic device.

Here, reference numeral 152 denotes an AC output control LED 152 which is turned on when an instantaneous power failure or an abnormal power supply is applied to an AC input voltage and the AC output power control function is operated. For example, When the AC input voltage is applied, the AC input indicating LED 151 is turned on, but the AC output controlling LED 152 is not turned on.

FIG. 8 is a circuit diagram of a power control processor in the instantaneous power failure and abnormal voltage prevention apparatus for a power supply according to an embodiment of the present invention, and FIG. 9 is a timing chart of the instantaneous power failure and the abnormal voltage Fig. 8 is a view for explaining delay time driving of the prevention device.

8, in the instantaneous power failure and abnormal voltage prevention apparatus for a power supply according to the embodiment of the present invention, after a momentary power failure, for example, a power failure is sustained for 10 msec or more In order to prevent abnormal operation of the electronic device when the rated voltage is applied, the power control processor 130 applies the AC output power after delaying the supply of the AC input voltage by a predetermined time. At this time, as shown in FIG. 9, the power application delay time can be selectively delayed for 6 seconds or 12 seconds by using the slide switch 131 and the delay time setting timer 132. At this time, the delay time has an operation error of 1 sec. It is apparent to those skilled in the art that the delay time setting timer 132 can be implemented through the NE555 element and the delay time can be set through the NE555 element.

In addition, the slide switch 131 allows the AC power to be supplied to the power supply device after a delay of 6 or 12 seconds, as shown in FIG. 10A, which will be described later. Here, reference numeral 151 denotes an AC input indicating LED 151 which is turned on when an AC input voltage in an AC input voltage tolerance range is applied.

10A and 10B are diagrams showing the outline of the instantaneous power failure and abnormal voltage prevention device for the power supply unit and the PCB board according to the embodiment of the present invention, respectively.

10A, the instantaneous power failure and abnormal voltage prevention apparatus 100 for a power supply according to the embodiment of the present invention is constructed such that it is mounted on a power supply unit, and a slide switch 131 is provided on one side of the case, An AC input display LED 151, an AC output control LED 152, an AC input voltage terminal 161, and an AC output power supply terminal 162 are formed.

10B, the PCB board of the instantaneous power failure and abnormal voltage prevention device 100 for a power supply according to the embodiment of the present invention can use, for example, a 1.6 mm thick GLASS EPOXY double-sided board, At this time, all parts and materials shall be replaceable with parts or materials within the tolerance range for inherent functions, performance and characteristics, and shall not affect the function or performance of the electronic equipment.

In addition, the instantaneous power failure and abnormal voltage prevention apparatus 100 for a power supply according to an embodiment of the present invention should be equipped with a circuit that can protect semiconductor devices from external surge voltage or surge current.

The rated output of the instantaneous power failure and abnormal voltage prevention device 100 for a power supply according to the embodiment of the present invention has a voltage rating of AC 220V, an output current of AC 7A and a PEAK output current of AC 9A, The range of motion variation is as shown in Table 1 below.

The instantaneous power failure and abnormal voltage prevention device for a power supply device according to an embodiment of the present invention has developed a function for preventing instantaneous power failure, overvoltage, and undervoltage as one module, and can easily and stably supply power to the corresponding electronic device have. For example, the electronic device may be an ATX main board, but the present invention is not limited thereto, and power can be supplied stably to various fields where a problem due to instantaneous power failure occurs.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Instantaneous power failure and abnormal voltage protection device for power supply
110: input voltage sensing unit
120: Output power control unit
130: Power control processor
140: abnormal voltage detection and blocking unit
150: Operation status indicator
121: TRIAC (TRIODE OF SWITCH)
131: Slide Switch
132: Delay time setting timer
151: AC input display LED
152: AC output control LED
161: AC input voltage terminal
162: AC output power terminal
210: Electronic device (for example, ATX main board)
220: Power supply (for example, SMPS)
230: Power switch

Claims (8)

1. An instantaneous power failure and abnormal voltage prevention device for a power supply for protecting a power supply when an AC input voltage is input,
An input voltage sensing unit 110 for sensing whether an AC input voltage is input;
An output power control unit 120 for controlling the AC input voltage to be supplied to the AC power supply to the power supply unit;
A power supply for applying the AC output voltage after a predetermined time delay to supply the AC input voltage to prevent an abnormal operation of a corresponding electronic device supplied with power through the power supply device when a rated voltage is applied after an instantaneous power failure, A control processor 130;
When the AC input voltage is lower than or equal to the allowable voltage for a predetermined period of time, it is determined that the AC input voltage is a low voltage or an overvoltage, and the AC output power is cut off to prevent the corresponding electronic device from performing an abnormal operation. An abnormal voltage detection and interruption unit 140 for interrupting the abnormal voltage; And
An operation state display unit 150 for displaying an AC input through an LED or displaying an AC output control so as to confirm the operation state of the AC input voltage and the AC output power,
Wherein when the AC input voltage is input to the power supply unit, the power control processor 130 controls the AC output power to be a predetermined power supply delay time when an instantaneous power failure, an overvoltage, Thereby protecting the electronic equipment using the power supply unit from an electric shock,
A low-voltage detection and blocking unit for detecting a change in the AC input voltage and determining that the AC input voltage is lower than a permissible voltage for a predetermined time, and blocking the AC output power supplied to the power supply; And an overvoltage detection and blocking unit that detects a change in the AC input voltage and determines an overvoltage when the AC input voltage exceeds a permissible voltage for a predetermined time and blocks the AC output power supplied to the power supply, Device for preventing instantaneous power failure and abnormal voltage for supply device. The method according to claim 1,
Wherein the power supply delay time delayed by the power control processor 130 is selected at 6 seconds or 12 seconds using a slide switch 131 and a delay time setting timer 132. [ Device for preventing instantaneous power failure and abnormal voltage for the device. delete The method according to claim 1,
When the AC input voltage exceeds 264 V ± 5% for 10 msec or more by detecting a change in the AC input voltage, the overvoltage detecting and breaking unit determines that the overvoltage is present and cuts off the AC output power, And stops the power supply when the AC input voltage reaches the permissible range of AC176V to 264V, and supplies the power to the corresponding electronic device by the output power control unit (120) And an abnormal voltage prevention device. The method according to claim 1,
When the AC input voltage is less than 176 V ± 5% and lasts for more than 10 ms, the low voltage detection and blocking unit determines that the AC input voltage is low and cuts off the AC output power so that the corresponding electronic device performs an abnormal operation And the power is supplied to the corresponding electronic device by the output power control unit 120 when the AC input voltage reaches the allowable range of AC 176V to 264V. Abnormal voltage prevention device. The method according to claim 1,
The output power control unit 120 controls the AC input voltage to be supplied to the AC output power source using the TRIAC 121. The AC input voltage is directly supplied to the AC output power source Wherein the power supply is used as a power supply. The apparatus according to claim 1, wherein the operation status display unit (150)
An AC input display LED 151 that is turned on when the AC input voltage is applied; And
And an AC output control LED (152) that is turned on when an AC output power control function is activated when an instantaneous power failure or an abnormal power is applied to the AC input voltage. 8. The method of claim 7,
Characterized in that when the AC input voltage of the AC input voltage tolerance is applied, the AC input indicating LED (151) is turned on and the AC output controlling LED (152) is not turned on. Abnormal voltage prevention device.

Images