KR102300128B1 - Instantaneous power failure compensation device for SMPS - Google Patents

Abstract

The present invention relates to an instantaneous power failure compensation device for a switch mode power supply (SMPS). According to the present invention, the instantaneous power failure compensation device for the SMPS includes: a rectifier unit (111) connected to input terminals (In+, In-) to rectify a commercial AC power into a DC power; a charging capacitor (120) charged by a current supplied from a commercial AC power supply (AC) when a power failure does not occur, and configured to supply a charging current (I2) to an SMPS (200) by a charged voltage when an instantaneous power failure occurs; a power failure switching element (131) connected between the charging capacitor (120) and output terminals (Out+, Out-); and a control unit (150) for receiving an input detection voltage (Vin) of an input voltage detection unit (140), and determining a case of voltage drop of the input detection voltage (Vin) to a preset compensation voltage (Vc) as the instantaneous power failure to output a switching-on control signal to the power failure switching element (131). Accordingly, the instantaneous power failure is effectively compensated for with a simple configuration.

Description

Instantaneous power failure compensation device for SMPS

The present invention relates to an instantaneous power failure compensation device for SMPS, and more particularly, to an instantaneous power failure compensation device for MPS to be suitable for effectively compensating for an instantaneous power failure with a simple configuration.

Recently, the reliability of electric power in industrial sites is very high, but, nevertheless, instantaneous voltage drop and instantaneous power outage often occur, causing a huge loss by generating defective products or stopping the operation of the production line. occurs This momentary unstable state is caused by short circuit accidents, lightning strikes, and switching of large loads in the power system. If so, it is considered a permanent power outage and the equipment must be stopped.

Most industrial equipment can withstand instantaneous power failure due to its mechanical properties and electrical inertia, but relays, starters, micro controllers, etc. control power voltage that occurs in an extremely short moment of several cycles. lost by voltage-sag/Dip. Accordingly, in preparation for such a power failure, an uninterruptible power supply (UPS) for SMPS that converts power to an alternative power source so that power can be continuously supplied even if power is cut off has been introduced.

The instantaneous power failure compensator protects electrical and electronic equipment from power failures such as short-time instantaneous power failure and voltage drop by using the energy stored in the battery at normal times, and continuously supplies rated control power to the load during the instantaneous power failure time. It was invented to enable equipment to operate normally.

And, the instantaneous power failure compensation device for compensating for instantaneous power failure using a battery is a modular power supply device that converts alternating current (AC) electricity supplied from commercial power to fit various devices such as computers, communication devices, and home appliances. Intermittent control at high frequency using high-speed power semiconductors and stable various DC voltages are obtained through rectification and smoothing circuits. DC power supply devices are largely divided into linear type and switch mode type. have. SMPS also has the disadvantage of generating noise and electromagnetic waves during the switching process. As a circuit method, the resonant type has the highest conversion efficiency and is mainly used for adapters of notebook PCs.

On the other hand, SMPS (Switch Mode Power Supply) is known as a power supply device for supplying an operating voltage to match the _{load (R L ).}

However, in the above techniques, in the case of a load ( _RL ) (eg, an electric motor, a compressor, etc.) in which the SMPS (200 is installed), appropriate instantaneous power failure compensation cannot be achieved.

1 shows an example of a use state of a general SMPS (Switch Mode Power Supply) 200 is shown.

As shown in Figure 1, the SMPS 200 is connected between the load (R _L ) and the commercial AC power source (AC) and the load to supply the operating voltage of the _{commercial AC power source (AC) to the load (R L ).} do.

It is connected to the SMPS 200 and supplies a constant output DC voltage to the SMPS, and a device for compensating for power failure during instantaneous power failure is required.

Document 1: Registered Patent Publication No. 10-1140177 (Announcement date: 2012.04.24) Document 2: Registered Patent Publication No. 10-1021598 (Announcement date: 2011.03.16)

The present invention was created to solve the problems of the prior art as described above. The purpose of the instantaneous power failure compensation device for SMPS according to the present invention is,

First, when the commercial AC power applied to the SMPS is momentarily blackout, it compensates for the instantaneous power failure so that power can be continuously supplied to the SMPS and the load without interruption of the power supply, and thus the load is protected from arcs and surges to protect the load. to prevent damage to the device in advance, and to always supply a constant value of DC voltage to the SMPS regardless of whether there is a power outage,

Second, it is possible to reduce the manufacturing cost of the product by compensating for the instantaneous power failure only with the electrostatic switching element and the charging capacitor.

Third, by supplying charging power during instantaneous power failure by a new control variable called compensation time, which is the maximum time value for supplying charging power during instantaneous power failure, many problems (damage, efficiency decrease) that may occur in the charging capacitor due to full discharge etc.), and distinguish between instantaneous and permanent blackouts so that in the case of permanent power outages other than instantaneous power failures, power outage compensation is not performed to effectively respond to power outages,

Fourth, to efficiently and effectively perform instantaneous power failure compensation by a simple circuit configuration,

Fifth, by connecting the first diode between the rectifying unit and the charging capacitor, the output value is increased so that the charging capacitor can be charged, so that the charging capacitor can be quickly charged with power;

Sixth, if there is a voltage drop of about 10 to 20% compared to the maximum value (maximum voltage value, Vm) before the input voltage value becomes completely zero, it is determined that this is a momentary power failure in advance and effectively instantaneous to be able to respond to power outages,

Seventh, by allowing the user to directly input and set the compensation voltage and compensation time, it is possible to efficiently and effectively respond to instantaneous power failure in consideration of the characteristics of the load connected to the SMPS,

Eighth, it is possible to isolate the charging capacitor and the control unit while controlling the switching of the electrostatic switching element to stabilize and protect the product (particularly parts such as the control unit and display unit),

Ninth, it allows remote administrators to know that instantaneous power failure has occurred at a low cost, even if equipment that requires relatively large installation costs, such as a separate communication module and display, is not installed.

Tenth, by a simple configuration, it is possible to efficiently control the amount of current output to the SMPS and the current input to the charging capacitor through the output stage,

Eleventh, using a part of the previous charging current to display the current instantaneous power failure with a simple configuration,

Twelfth, to provide an instantaneous power failure compensation device for SMPS that is suitable to display the current power supply state (normal state) and charging with a simple configuration using a part of the current input to the previous charging capacitor. there is

The instantaneous power failure compensation device for SMPS of the present invention for achieving the above object is connected between the commercial AC power and the SMPS to compensate for the instantaneous power failure when the commercial AC power supply is cut off due to an instantaneous power failure. An instantaneous power failure compensation device for SMPS for is charged by the current supplied from the commercial AC power source, and when a momentary power failure occurs in the commercial AC power source, a charging capacitor that supplies a charging current to the SMPS through the output terminal by the charged voltage, and between the charging capacitor and the output terminal an electrostatic switching device connected to the , an input voltage detection unit that converts the voltage of the input commercial AC power into an input detection voltage readable by the control unit, and applies the converted input detection voltage to the control unit, and the input of the input voltage detection unit and a control unit for outputting a switching-on control signal to the electrostatic switching device by determining that it is an instantaneous power failure when the detection voltage is applied and the input detection voltage drops to a preset compensation voltage, and input from a commercial AC power supply The commercial AC current is output to the output terminal through the rectifying unit and supplied to the SMPS. And, the charging current by the voltage charged in the charging capacitor is output to the output terminal and supplied to the SMPS, so that even if the commercial AC power is momentarily blackout, the current supply to the SMPS is maintained without interruption.

The instantaneous power failure compensation device for SMPS according to the present invention having the above configuration has the following effects.

First, when the commercial AC power applied to the SMPS is momentarily blackout, there is an effect that power can be continuously supplied to the SMPS and the load without interruption of power supply by compensating for the momentary power failure, and as a result, the load is protected from arcs and surges. It has the effect of preventing damage to the load in advance by protecting it. In addition, there is an effect of always supplying a DC voltage of a constant value to the SMPS regardless of whether there is a power outage.

Second, there is an effect that the manufacturing cost of the product can be lowered by allowing the instantaneous power failure to be compensated only by the electrostatic switching device and the charging capacitor.

Third, by supplying charging power during instantaneous power failure by a new control variable called compensation time, which is the maximum time value for supplying charging power during instantaneous power failure, many problems (damage, efficiency decrease) that may occur in the charging capacitor due to full discharge etc.), and also has the effect of effectively responding to power outages by not performing power outage compensation in case of permanent power failure, not instantaneous power failure, by distinguishing between momentary power failure and permanent power failure.

Fourth, there is an effect of efficiently and effectively performing instantaneous power failure compensation by a simple circuit configuration.

Fifth, by connecting the first diode between the rectifier and the charging capacitor, there is an effect that the charging capacitor can be charged by increasing the output value, and as a result, the charging capacitor can be quickly charged with power.

Sixth, if there is a voltage drop of about 10 to 20% compared to the maximum value (maximum voltage value, Vm) before the input voltage value becomes completely zero, it is determined that this is a momentary power failure in advance and effectively instantaneous It has the effect of responding to power outages.

Seventh, there is an effect that the user can directly input and set the compensation voltage and compensation time, and there is an effect that can efficiently and effectively respond to the instantaneous power failure in consideration of the characteristics of the load connected to the SMPS.

Eighth, there is an effect of stabilizing and protecting the product (particularly parts such as the control unit and the display unit) by isolating the charging capacitor and the control unit while controlling the switching of the electrostatic switching device.

Ninth, there is an effect that a remote administrator can know that an instantaneous power outage has occurred at a low cost even if a separate communication module and equipment that incur a relatively large installation cost, such as a display, are not installed.

Tenth, there is an effect that can efficiently control the amount of current output to the SMPS through the output terminal and the current input to the charging capacitor by a simple configuration.

Eleventh, there is an effect that can display the current instantaneous power outage with a simple configuration using a part of the previous charging current.

Twelfth, there is an effect of displaying the current power supply state (normal state) and charging with a simple configuration using a part of the current input to the previous charging capacitor.

1 is an exemplary diagram of a general SMPS 200 in use.
2 is a diagram illustrating a state of use of the instantaneous power failure compensation device 100 for SMPS according to an embodiment of the present invention.
3 is a block diagram of the main part of the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention shown in FIG. 2 .
4 is a block diagram of the remaining main parts of the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention shown in FIG. 2 .

Hereinafter, a preferred embodiment of the instantaneous power failure compensation device for SMPS according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention is an instantaneous power failure compensation device for SMPS to compensate for a momentary power failure of commercial AC power supplied to the SMPS so that the power supply to the SMPS is continuously supplied without interruption.

The instantaneous power failure compensation device 100 for SMPS according to an embodiment of the present invention is connected in series between the commercial AC power source (AC) and the SMPS (200) so that the commercial AC power source (AC) is instantaneously interrupted, so that the commercial AC power source (AC) ) as a momentary power failure compensation device for SMPS for compensating for instantaneous blackout by outputting a supply voltage (eg, the SMPS supply voltage is 24 V) to the SMPS 200 when the power supply from the An input terminal (In+, In-) connected to, an output terminal (Out+, Out-) connected to the SMPS 200, and an input terminal (In+, In-) are connected to commercial AC power (eg, AC 220 V) to DC (eg, DC 220 V), connected to the rear end of the rectifying unit 111 and the rectifying unit 111, is charged by the current supplied from the commercial AC power source (AC) in the event of a non-power failure, instantaneous from the commercial AC power source (AC) When a power outage occurs, the charging capacitor 120 supplies the charging current I2 to the SMPS 200 through the output terminals Out+, Out- by the charged voltage, and the charging capacitor 120 and the output terminals Out+ , Out-), when a switching-on control signal (trigger signal of the gate terminal (G) of the FET 131 in the example below) is input from the control unit 150, it is switched on and the charging capacitor 120 is switched off to the SMPS 200 through the output terminals Out+, Out-, and a switching-on control signal is not input from the control unit 150, so that the charging current of the charging capacitor 120 is The electrostatic switching element 131 that blocks the flow to the SMPS 200 through the output terminals (Out+, Out-) and the input detection voltage Vin that the controller 150 can read the voltage of the input commercial AC power (AC) ), the input voltage detection unit 140 for applying the converted input detection voltage Vin to the control unit 150, and the input detection voltage Vin of the input voltage detection unit 140 are applied, and the input The detection voltage (Vin) is a preset compensation voltage (Vc) ), it is determined that there is a momentary power failure, and the control unit 150 is configured to output a switching-on control signal to the electrostatic switching device 131 .

And, in the instantaneous power failure compensation device 100 for SMPS according to an embodiment of the present invention, the commercial AC current I1 input from the commercial AC power source AC passes through the rectifier 111 to the output terminal Out+, Out-) and supplied to the SMPS 200 (at this time, the circuit of I1 is formed), at this time, the power to the _{load R L is supplied by the current I1 output to the SMPS 200, and commercial AC power} When there is a momentary power failure in (AC), the control unit 150 outputs a switching-on control signal to the electrostatic switching device 131 so that the electrostatic switching device 131 is switched on, and the electrostatic switching device 131 is switched on. A circuit is formed by the charging voltage of the charging capacitor 120 by switching on, and the charging current I2 by the voltage charged in the charging capacitor 120 is output to the output terminals (Out+, Out-) so that the SMPS ( 200), the current supply to the SMPS 200 is maintained without interruption even if the commercial alternating current power (AC) is momentarily blacked out (therefore, the power supply to the load can be continued without stopping) .

According to the above configuration, when the commercial AC power applied to the SMPS 200 is momentarily blackout, the power supply is continuously supplied to the SMPS 200 and the load R _{L by compensating for the instantaneous power failure.} can As a result, it is possible to protect the load from arcs and surges to prevent damage to _{the load (R L ) in advance.}

In addition, since the instantaneous power failure can be compensated only for the electrostatic switching element 131 and the charging capacitor 120 , the manufacturing cost of the product can be reduced.

In the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention, the voltage output to the output terminals (Out+, Out-) and supplied to the SMPS 200 is a DC voltage and a constant DC voltage value (DC in the example above). 24 V).

In the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention, the controller 150 outputs the switching-on control signal and then outputs the switching-on control signal. The input detection voltage ( Vin) is input to less than the compensation voltage Vc (that is, when the power failure is continuously maintained during the compensation time Tc), a switching-off control signal [ For example, it includes stopping the output of the switching-on control signal in order to turn off the electrostatic switching element.] is output.

Charging capacitor 120 for supplying power in case of instantaneous power failure, for example, does not have a large capacity, such as about 1500 uF, so that charging power can be supplied to the SMPS 200 only for about 5 seconds (maximum charging current supply time). only to the extent

However, when the charging capacitor 120 for supplying charging power endures to the maximum that it can withstand, for example, about 5 seconds (maximum supply time of charging current), the charging capacitor 120 is charged again after being completely discharged. The charging efficiency of the capacitor 120 decreases, the charging capacitor 120 may be damaged, the lifespan of the charging capacitor 120 decreases, and problems such as a decrease in the maximum charging voltage occur. After the compensation time Tc has elapsed, the problems occurring in the charging capacitor 120 may be prevented in advance by cutting off the supply of charging power.

In addition, if the power outage is maintained until the compensation time Tc set after the controller 150 determines that the power outage is instantaneous, at this time it is already a permanent power outage rather than an instantaneous power failure. This is to cut off the supply of charging power supplied from

That is, in the case of a permanent power failure rather than an instantaneous power failure, there is no need to supply the charging power of the charging capacitor 120 (since it is meaningless to supply charging power in the case of a permanent power failure), furthermore, the charging capacitor 120 is completely In order to protect the capacitor according to the full discharge, the charging current of the charging capacitor 120 is cut off immediately after the set instantaneous blackout compensation time tc has elapsed from the moment when the power failure is sensed.

At this time, the electrostatic switching element 131 is switched off when a switching-off control signal is input from the control unit 150, and when the electrostatic switching element 131 is switched off, the charging current of the charging capacitor 120 is reduced to the SMPS (200). It is characterized in that it does not flow into the

The switching-off control signal is input, for example, when the electrostatic switching device 131 is configured by the FET 131 and a trigger current is not applied to the gate terminal G.

In the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention, the reverse current flowing from the charging capacitor 120 to the rectifying unit 111 is connected between the rectifying unit 111 and the charging capacitor 120 . a first diode D1 for blocking 3 diodes D3 are further included, and the output terminal Out+ (+ terminal Out+ of the output terminal) is connected to the second node n2 between the second diode D2 and the third diode D3. connected, and the second diode D2 is connected to the first node n1 and the second node n2, and a current flows from the first node n1 to the second node direction, and a second node ( It is connected to block the flow of current from n2) to the first node n1 (that is, the anode terminal of the second diode D2 is connected to the second node n2, and the cathode of the second diode D2) terminal is connected to the first node n1], and the third diode D3 is connected between the second node n2 and the electrostatic switching element 131, and from the electrostatic switching element 131 to the second node Current flows to the output terminal (Out+) (the + terminal (Out+) of the output terminal) via (n2), and is connected to block the flow of current from the second node (n2) to the electrostatic switching element 131 [that is, the first 3 The anode terminal of the diode D3 is connected to the second node n2, and the cathode terminal of the second diode D2 is connected to the output terminal (source terminal S) of the electrostatic switching element 131], The current I1 input from the commercial AC power source (AC) is output to the output terminals (Out+, Out-) through the rectifying unit 111 and output to the SMPS 200 (at this time, the circuit of I1 is formed), at this time the SMPS Power is supplied to the load by the current outputted to 200 , and when there is a momentary power failure in the commercial alternating current (AC), the control unit 150 switches on the electrostatic switching device 131 . By outputting a control signal, the electrostatic switching element 131 is switched on, and a circuit is formed by the charging voltage of the charging capacitor 120 by the switching on of the electrostatic switching element 131, and the charging capacitor 120 is The charging current (I2) by the charged voltage is output to the output terminals (Out+, Out-) and supplied to the SMPS (200) so that even if the commercial AC power supply (AC) is momentarily blacked out, the current supply to the SMPS (200) is not cut off. It is characterized in that it is maintained [thus, that the supply of power to the load can be continued without interruption].

According to the circuit configuration as described above, there is an advantage in that instantaneous power failure compensation can be efficiently and effectively performed by a simple circuit configuration.

In addition, the rectifying unit 111 may be configured as a bridge diode.

V(약 300 V)로 출력값을 증가하여서 충전 캐패시터(120)에 충전할 수 있으므로, 충전 캐패시터(120)에 신속하고도 많은 전하를 충전할 수 있는 이점이 있다.In addition, by connecting the first diode D1 between the rectifying unit 111 and the charging capacitor 120, the DC 220 V voltage passing through the rectifying unit 111 is changed to DC 220 *

Since it is possible to charge the charging capacitor 120 by increasing the output value to V (about 300 V), there is an advantage in that the charging capacitor 120 can be quickly charged with a large amount of charge.

In the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention, the compensation time (Tc) is the maximum power failure compensation time, for example, Tc = 0.5 ~ 2.0 sec.

In the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention, the compensation voltage (Vc) is, Equation (1),

Vc = [Vm - (Vm * 0.2)] to [Vm - (Vm * 0.1)] -- Equation (1)

characterized by being determined by

That is, the compensation voltage Vc is determined as a voltage drop value of 10 to 20% of the maximum value Vm from the maximum value Vm (eg, Vm = 220 V) of the commercial AC voltage.

According to this, if there is a voltage drop of about 10 to 20% before the voltage value becomes completely zero, it is determined that this is a momentary power failure in advance, and there is an advantage that can effectively cope with the momentary power failure.

The input voltage detection unit 140 may be composed of, for example, a first resistor (Ra) and a second resistor (Rb), and divide the first resistor (Ra) and the second resistor (Rb) by selecting an appropriate resistance value. It will be possible to make the input detection voltage with the voltage.

In the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention, the compensation time Tc stored in a memory (not shown) under the control of the control unit 150 is the charging time during an instantaneous power failure. It is characterized in that the capacitor 120 is smaller than the maximum time (Tm) that can supply the charging current to the SMPS (200).

Preferably, the compensation time (Tc) is 1/3 to 3/4 of the maximum time (Tm) during which the charging capacitor 120 can supply the charging current to the SMPS 200 .

In the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention, a compensation time input unit 171 for setting the compensation time Tc, and a compensation voltage for setting the compensation voltage Vc An input unit 172 is further included, and the control unit 150 stores the compensation time Tc input from the compensation time input unit 171 in a memory (not shown), and the compensation voltage input unit 172 . It is characterized in that the compensation voltage (Vc) input from the is stored in the memory.

As described above, the compensation voltage (Vc) and compensation time (Tc) (particularly, compensation voltage (Vc)) can be directly input and set by the user, so that instantaneous power failure is efficient in consideration of the characteristics of the load connected to the SMPS (200). There is an advantage to be able to respond effectively even to this.

The memory may be a separate external storage medium, or may be a memory built into the control unit 150, and of course, fall within the technical scope of the present invention in any case.

In the instantaneous power failure compensation device 100 for SMPS according to an embodiment of the present invention, the electrostatic switching device 131 has a drain terminal D connected to the charging capacitor 120 and a source terminal S is composed of a FET 131 connected to the cathode terminal of the third diode D3, a first light receiving unit 132b connected to the gate terminal G of the FET 131, and the control unit 150 A first photocoupler 121 including a first light emitting unit 132a for emitting control light to the first light receiving unit 132b when receiving a switching-on control signal is further included, and the control unit 150 is configured to A switching-on control signal is output to the first light emitting unit 132a, and when the control light is incident from the first light emitting unit 132a, the first light receiving unit 132b is connected to the gate terminal (G) of the FET 131 . is operated to flow a trigger current, and the FET (131) is switched on by the operation of the first light receiving unit (132b).

It is possible to isolate the charging capacitor 120 and the control unit 150 while controlling the switching of the electrostatic switching device 131 , thereby stabilizing and protecting the product (particularly, parts such as the control unit and the display unit).

In the instantaneous power failure compensation device 100 for SMPS according to an embodiment of the present invention, it is connected to the output terminal (the source terminal S in the case of the FET 131) of the electrostatic switching device 131 to determine the amount of charging current A third resistor R3 having a relatively large limiting resistance value, a second light emitting part 135a connected in series to the rear end of the third resistor R3, and the second light emitting part 135a A second photocoupler 135 comprising a second light receiving unit 135b that performs a switching operation according to an optical signal is further included, and the collect terminal of the second light receiving unit 135b of the second photocoupler 135 is remote Of the pair of connectors (N1, N2) connected to the alarm 300 (eg, buzzer, siren, warning light, horn, etc.) of the The emitter terminal of (135b) is connected to the other connector (N2) among the pair of connectors (N1, N2) connected to the remote alarm 300, the electrostatic switching element 131 is switched on, so that the charging capacitor When the charging current of 120 is output to the output terminals Out+, Out- through the third diode D3, a very small portion of the charging current of the charging capacitor 120 (1% of the total charging current) is It is output to the second light emitting unit 135a of the second photocoupler 135, and when commercial AC power is normally applied, the second light receiving unit 135b of the second photocoupler 135 is switched off and an alarm is generated. 300 becomes an open circuit, so the alarm 300 does not operate, and a very small current i3 (1% of the total charging current) of the charging current of the charging capacitor 120 due to an instantaneous power failure is transferred to the second port When the second light receiving unit 135b of the second photocoupler 135 is switched on by being output to the second light emitting unit 135a of the coupler 135, the alarm 300 becomes a closed circuit and the alarm 300 operates. characterized in that

A remote manager recognizes that an instantaneous power failure has occurred when the alarm 300 operates (eg, a buzzer sounds or an LED is turned on).

According to this, it is possible to know that instantaneous power failure has occurred at a low cost even if equipment that is relatively expensive to install, such as a separate communication module and display, is not installed.

The second photocoupler 135, the second photocoupler 135, 135a, and the second light receiving part 135b are electrically isolated from each other so that the charging capacitor 120 and the charging capacitor 120 (about 300 V in the example above) are electrically isolated from each other. It can protect the device from

In the instantaneous blackout compensation apparatus 100 for SMPS according to an embodiment of the present invention, the control unit 150 counts the number of instantaneous blackouts, and outputs the counted number of instantaneous blackouts to the display unit 180, It is characterized in that the display unit 180 is further included to receive the number of instantaneous power failures and the voltage of the supplied power from the control unit 150, and to display the number of times of the received instantaneous power failure and the voltage of the power source.

In the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention, a reset key 173 for resetting the number of power failures is further included, and a reset key signal is input from the reset key 173 In this case, the control unit 150 resets the counted number of instantaneous power failures.

In the instantaneous power failure compensation device 100 for SMPS according to an embodiment of the present invention, it is connected between the first diode D1 and the charging capacitor 120, and the SMPS 200 through the output terminals (Out+, Out-) ) and a current control resistor (R2) for controlling the amount of the current (I1) output to and the amount of the current (I3) input to the charging capacitor (120) is characterized in that it is further included.

According to this, the amount of the current I1 output to the SMPS 200 and the current I3 input to the charging capacitor 120 through the output terminals Out+, Out- can be efficiently adjusted by a simple configuration.

In the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention, it is connected in series to the rear end of the first light emitting part 132a of the first photocoupler 132, so that only a small portion of the charging current I2 It is characterized in that the light-emitting operation by the branch current (i3) that is (about 1% or less of the total charging current) is characterized in that the electrostatic LED (191) is further included to indicate the state of instantaneous power failure.

According to this, it is possible to display the current instantaneous power failure state with a simple configuration using a part of the previous charging current I1.

In the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention, the current I3 is connected to the rear end of the charging capacitor 120 , passes through the rectifier 111 and is input to the charging capacitor 120 . ) of the fourth resistor R4 having a relatively large resistance value that limits the amount of current so that only a small portion (about 1% or less of the total input current I3) passes through, and the fourth resistor R4 It is connected to the rear end and is a branch current i4 that has passed through the fourth resistor R4, that is, a very small portion (about 1% or less of the total charging current) of the current I3 input to the charging capacitor 120 ( It is characterized in that the light-emitting operation is performed by i4), so that the current is normally supplied by the commercial AC power and at the same time, the electrostatic LED 192 indicating that the charging capacitor 120 is being charged is further included.

According to this, it is possible to display the current power supply state (normal state) and charging with a simple configuration using a part of the current I3 input to the existing charging capacitor 120 .

In the instantaneous power failure compensation apparatus 100 for SMPS according to an embodiment of the present invention, an operating voltage supply unit 160 for supplying an operating voltage Vcc to the entire device such as the control unit 150 and the display unit 180 . It is characterized in that it is further included.

The operating voltage supply unit 160 is connected to the first node n1, which is a rear end of the input terminals In+, In-, and converts the rectified high-voltage (eg, DC 220 V) voltage to the operating voltage (Vcc) (eg, DC 5 V). converted into , and supplied to the control unit 150 and the display unit 180 .

As described above, preferred embodiments according to the present invention have been reviewed, and it is common knowledge in the technical field that the present invention can be implemented in other specific forms without changing the technical spirit or essential features in addition to the above-described embodiments. It is self-evident to those who have Therefore, it should be understood that the above-described embodiments are illustrative and not restrictive.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

100: Instantaneous power failure compensation device for SMPS according to an embodiment of the present invention
200: magnet switch 210: driving coil of the magnet switch
100: momentary power failure compensation device according to an embodiment of the present invention
In+,In- : Input terminal, Out+, Out- : Output terminal
111: rectifier 120: charging capacitor
D1: first diode D2: second diode
D3: third diode 131: electrostatic switching element
132: first photo coupler
132a: light-emitting unit of the first photocoupler 132b: light-receiving unit of the first photocoupler
135: second photo coupler
135a: light-emitting unit of the second photocoupler 135b: light-receiving unit of the second photocoupler
R3: third resistor R4: fourth resistor
140: input voltage detection unit 150: control unit
Vin : Input detection voltage Vc : Compensation voltage
160: operating voltage supply unit 171: compensation time setting unit
172: compensation voltage setting unit 173: reset key
180: display
191: blackout LED 192: charging LED
200: SMPS 300: alarm
AC : Commercial AC power R _L : Load
N1, N2 : Connector

Claims (5)

Instantaneous power outage compensation for SMPS to compensate for instantaneous power failure when the commercial AC power supply (AC) is cut off due to an instantaneous power failure connected between the commercial AC power source (AC) and the SMPS (200) As a device,
Input terminals (In+, In-) connected to commercial AC power,
Output terminals (Out+, Out-) connected to the SMPS (200) and,
A rectifier 111 connected to the input terminals (In+, In-) to rectify commercial AC power into DC;
The output terminal ( A charging capacitor 120 for supplying a charging current I2 to the SMPS 200 through Out+, Out-);
an electrostatic switching element 131 connected between the charging capacitor 120 and the output terminals Out+, Out-;
An input voltage detection unit ( 140) and
When the input detection voltage Vin of the input voltage detection unit 140 is applied and the input detection voltage Vin drops to a preset compensation voltage Vc, it is determined that the power failure is an instantaneous power failure and the electrostatic switching element 131 ) is configured to include a control unit 150 that outputs a switching-on control signal,
The commercial AC current I1 input from the commercial AC power source (AC) is output to the output terminals (Out+, Out-) through the rectifier 111 and is supplied to the SMPS (200).
When there is a momentary power failure in the commercial alternating current (AC), the control unit 150 outputs a switching-on control signal to the electrostatic switching device 131 so that the electrostatic switching device 131 is switched on, and the charging capacitor 120 ), the charging current (I2) by the voltage charged in the output terminal (Out+, Out-) is output to the SMPS (200), thereby supplying the current to the SMPS (200) even if the commercial AC power supply (AC) is momentarily blackout It remains uninterrupted,
A first diode (D1) connected between the rectifying unit 111 and the charging capacitor 120 to block the reverse current flowing from the charging capacitor 120 to the rectifying unit 111;
A second diode D2 and a third diode D3 connected between the first node n1 between the rectifier 111 and the first diode D1 and the output terminal of the electrostatic switching device 131 are further included. become,
The output terminal (Out+) is connected to the second node (n2) between the second diode (D2) and the third diode (D3),
The second diode D2 is connected to the first node n1 and the second node n2, and a current flows from the first node n1 to the second node, and from the second node n2 to the second diode D2. It is connected to block the flow of current to the 1 node (n1),
The third diode D3 is connected between the second node n2 and the electrostatic switching device 131, and the current flows from the electrostatic switching device 131 to the output terminal Out+ via the second node n2. and is connected to block the flow of current from the second node n2 to the electrostatic switching device 131,
The current I1 input from the commercial alternating current power (AC) is output to the output terminals (Out+, Out-) through the rectifier 111 and is output to the SMPS 200,
When there is a momentary power failure in the commercial alternating current power (AC), the control unit 150 outputs a switching-on control signal to the electrostatic switching device 131 so that the electrostatic switching device 131 is switched on,
The charging current I2 by the voltage charged in the charging capacitor 120 by the switching on of the electrostatic switching element 131 is output to the output terminals Out+, Out- and supplied to the SMPS 200 for commercial AC Instantaneous power failure compensation device for SMPS, characterized in that the current supply to the SMPS (200) is maintained without interruption even if the power source (AC) is momentarily blackout.
Instantaneous power outage compensation for SMPS to compensate for instantaneous power failure when the commercial AC power supply (AC) is cut off due to an instantaneous power failure connected between the commercial AC power source (AC) and the SMPS (200) As a device,
Input terminals (In+, In-) connected to commercial AC power,
Output terminals (Out+, Out-) connected to the SMPS (200) and,
A rectifier 111 connected to the input terminals (In+, In-) to rectify commercial AC power into DC;
The output terminal ( A charging capacitor 120 for supplying a charging current I2 to the SMPS 200 through Out+, Out-);
an electrostatic switching element 131 connected between the charging capacitor 120 and the output terminals Out+, Out-;
An input voltage detection unit ( 140) and
When the input detection voltage Vin of the input voltage detection unit 140 is applied and the input detection voltage Vin drops to a preset compensation voltage Vc, it is determined that the power failure is an instantaneous power failure and the electrostatic switching element 131 ) is configured to include a control unit 150 that outputs a switching-on control signal,
The commercial AC current I1 input from the commercial AC power source (AC) is output to the output terminals (Out+, Out-) through the rectifier 111 and is supplied to the SMPS (200).
When there is a momentary power failure in the commercial alternating current (AC), the control unit 150 outputs a switching-on control signal to the electrostatic switching device 131 so that the electrostatic switching device 131 is switched on, and the charging capacitor 120 ), the charging current (I2) by the voltage charged in the output terminal (Out+, Out-) is output to the SMPS (200), thereby supplying the current to the SMPS (200) even if the commercial AC power supply (AC) is momentarily blackout It remains uninterrupted,
The control unit 150,
After outputting the switching-on control signal, output the switching-on control signal Compensation time (Tc) stored in advance by counting from the starting point outputting a switching-off control signal for switching off the electrostatic switching element 131 when the input detection voltage Vin is inputted below the compensation voltage Vc during
a compensation time input unit 171 for setting the compensation time Tc;
A compensation voltage input unit 172 for setting the compensation voltage Vc is further included and configured,
The control unit 150 stores the compensation time Tc input from the compensation time input unit 171 in a memory, and stores the compensation voltage Vc input from the compensation voltage input unit 172 in the memory. Instantaneous power failure compensation device for SMPS.
The method according to claim 1 or 2,
The control unit 150 counts the number of instantaneous blackouts, and outputs the counted number of instantaneous blackouts to the display unit 180,
Receives the number of instantaneous power failures and the voltage of the supplied power from the control unit 150, and a display unit 180 for displaying the number of times of the received instantaneous power failure and the voltage of the power source is further included. blackout compensation device.
The method according to claim 1,
It is connected between the first diode D1 and the charging capacitor 120, and the amount of current I1 output to the SMPS 200 through the output terminals Out+, Out- and the current input to the charging capacitor 120 ( Instantaneous power failure compensation device for SMPS, characterized in that it further includes a current control resistor (R2) for controlling the amount of I3).
The method according to claim 1,
a third resistor R3 connected to the output terminal of the electrostatic switching element 131 and having a relatively large resistance value limiting the amount of charging current;
a second light emitting part 135a connected in series to the rear end of the third resistor R3;
A second photocoupler 135 comprising a second light receiving unit 135b that performs a switching operation according to an optical signal emitted from the second light emitting unit 135a is further included and configured,
The collector terminal of the second light receiving unit 135b of the second photocoupler 135 is connected to one connector N1 among a pair of connectors N1 and N2 connected to the remote alarm 300,
The emitter terminal of the second light receiving unit 135b of the second photocoupler 135 is connected to the other connector N2 among the pair of connectors N1 and N2 connected to the remote alarm 300,
When the electrostatic switching element 131 is switched on and the charging current of the charging capacitor 120 is output to the output terminals Out+, Out- through the third diode D3, the charging current of the charging capacitor 120 Some of the current is output to the second light emitting part 135a of the second photocoupler 135,
When commercial AC power is normally applied, the second light receiving unit 135b of the second photocoupler 135 is switched off so that the alarm 300 becomes an open circuit and the alarm 300 does not operate,
A part of the current i3 of the charging current of the charging capacitor 120 is output to the second light emitting unit 135a of the second photocoupler 135 by the instantaneous power failure, so that the second light receiving unit of the second photocoupler 135 is output. When the (135b) is switched on, the alarm 300 becomes a closed circuit, so that the alarm 300 operates.

Images