KR100217521B1 - A soft start circuit for limiting of a rush current in inverter - Google Patents
A soft start circuit for limiting of a rush current in inverter Download PDFInfo
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- KR100217521B1 KR100217521B1 KR1019960081002A KR19960081002A KR100217521B1 KR 100217521 B1 KR100217521 B1 KR 100217521B1 KR 1019960081002 A KR1019960081002 A KR 1019960081002A KR 19960081002 A KR19960081002 A KR 19960081002A KR 100217521 B1 KR100217521 B1 KR 100217521B1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5375—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with special starting equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
Abstract
본 발명은 통신전원용 인버터의 돌입전류제한을 위한 소프트스타트(SOFT START)회로에 관한 것으로서, 컴퓨터, 컴퓨터모니터, 프린터등 OA기기를 부하로 인가할 때 과도적으로 발생하는 돌입전류의 영향을 최소화시키기 위해,The present invention relates to a soft start circuit for limiting inrush current of an inverter for a communication power supply, and to minimize the effects of transient inrush current generated when an OA device such as a computer, a computer monitor, or a printer is applied to a load. for,
통신용 직류전원을 승압한 후에 흐르는 전류를 검출하여 이를 전압으로 변환하는 전류검출부(10)와, 전류검출부(10)의 출력신호에 따라 출력이 쇼트인 경우 게이트를 차단해주고 부하인가에 따른 돌입전류가 발생하는 경우 고주파 소프트 스위칭(Soft Switching)의 특성을 갖는 인버터 고주파스위칭회로부(30)와, 전류검출부(10)의 출력을 받아 인버터 고주파스위칭회로부(30)의 스위칭소자를 제어하는 게이트신호처리부(20)를 포함하여 구성된 통신전원용 인버터에 있어서, 전류검출부(10)와 게이트신호처리부(20) 사이에 연결되고, 전류검출부(10)의 출력신호를 입력받아 증폭시킨 후 전압비교기(C)의 입력단으로 출력하는 연산증폭기(OP)와, 연산증폭기(OP)의 출력과 기준전압을 입력받아 이를 비교한 후 게이트신호처리부(20)로 제어신호를 출력하는 전압비교기(C)를 포함하여 구성된 소프트스타트회로(A)를 제공하는 것이다.When the output is shorted according to the output signal of the current detector 10 and the current detector 10 which detects the current flowing after the voltage of the communication DC power is boosted and converts it into a voltage, the gate is cut off and the inrush current according to the load is applied. In case of occurrence, the inverter high frequency switching circuit unit 30 having the characteristics of high frequency soft switching and the gate signal processor 20 controlling the switching elements of the inverter high frequency switching circuit unit 30 by receiving the output of the current detection unit 10. In the inverter for communication power supply comprising a), is connected between the current detector 10 and the gate signal processing unit 20, receives the output signal of the current detector 10, amplifies the output signal to the input terminal of the voltage comparator (C) A voltage comparator C for outputting an operational amplifier OP, an output of the operational amplifier OP, and a reference voltage, and comparing the same, and outputting a control signal to the gate signal processing unit 20. It is to provide a soft start circuit (A) configured to include.
Description
본 발명은 통신전원용 인버터의 돌입전류제한을 위한 소프트스타트(SOFT START)회로에 관한 것으로서, 더욱 상세하게는 통신전원용 인버터에 컴퓨터, 컴퓨터모니터, 프린터등 OA기기를 부하로 인가할 때 과도적으로 발생하는 돌입전류의 영향을 최소화시키기 위한 소프트스타트회로에 관한 것이다.The present invention relates to a soft start circuit for limiting inrush current of an inverter for communication power, and more particularly, when a computer, a computer monitor, a printer, or an OA device is applied to a communication power inverter as a load. The present invention relates to a soft start circuit for minimizing the influence of inrush current.
일반적으로, 통신전원용 인버터는 고주파방식(DC/DC : Fs 120KHz, DC/AC : Fs 30KHz)을 사용하여 85% 이상의 고효율을 얻게 되며, 여기에 1kVA 이상되는 컴퓨터, 20인치 모니터, 프린터등 사무자동화 기기를 부하로 인가할 때 초기돌입전류가 발생하게 된다.In general, the inverter for communication power uses high frequency (DC / DC: Fs 120KHz, DC / AC: Fs 30KHz) to obtain high efficiency of over 85%, and the office automation such as computers, 20-inch monitors, printers, etc. over 1kVA An initial inrush current occurs when the device is applied to the load.
통신전원용 인버터에 사무자동화 기기 등의 1kVA 이상의 부하가 인가될 경우에는 과도적으로 정격의 20 ~ 30배에 달하는 돌입전류가 발생되어 이로 인한 인버터의 안정성 및 전원효율을 떨어뜨릴 뿐만 아니라, 인버터를 설계하는데 있어서도 많은 어려움을 초래하는 문제점이 있었다.When a load of 1kVA or more, such as office automation equipment, is applied to the communication power inverter, an inrush current of 20 to 30 times of the rated voltage is generated transiently, thereby reducing the stability and power efficiency of the inverter and designing the inverter. There was a problem that causes a lot of difficulties.
본 발명은 상기와 같은 문제점을 감안하여 안출된 것으로서, 사무자동화 기기 등의 부하를 통신전원용 인버터에 인가할 경우 과도적으로 발생하는 정격의 20 ~ 30배에 달하는 돌입전류를 3 ~ 4배로 낮춰줌으로써 전원효율을 높이고, 또한, 안정적인 동작이 가능한 통신전원용 인버터를 제공하는 것을 그 목적으로 한다.The present invention has been made in view of the above problems, by lowering the inrush current of 20 to 30 times the rating generated transiently to 3 to 4 times when applying a load such as office automation equipment to the inverter for communication power supply It is an object of the present invention to provide an inverter for communication power supply which can improve power supply efficiency and enable stable operation.
이와 같은 목적을 달성하기 위해 본 발명은, 통신용 직류전원을 승압한 후에 흐르는 전류를 검출하여 이를 전압으로 변환하는 전류검출부와, 전류검출부의 출력신호에 따라 출력이 쇼트인 경우 게이트를 차단해주고 부하인가에 따른 돌입전류가 발생하는 경우 고주파 소프트 스위칭(Soft Switching)의 특성을 갖는 인버터 고주파스위칭회로부와, 전류검출부의 출력을 받아 인버터 고주파스위칭회로부의 스위칭소자를 제어하는 게이트신호처리부와, 교류출력전압 및 전류를 감지하여 게이트신호처리부를 제어하는 인버터 제어회로부와, 고주파 노이즈를 제거하기 위해 인버터 고주파스위칭회로부의 출력단에 연결된 로우패스필터부를 포함하여 구성되는 통신전원용 인버터에 있어서, 전류검출부와 게이트신호처리부 사이에 전류검출부의 출력신호를 처리하여 게이트신호처리부에 전달하는 소프트스타트회로를 연결함으로써, 사무자동화 기기 등의 부하가 인가될 때 과도적으로 발생하는 돌입전류를 크게 제한하도록 한 것을 특징으로 한다.In order to achieve the above object, the present invention provides a current detection unit for detecting a current flowing after boosting a communication DC power supply and converting it into a voltage, and blocking the gate when the output is short according to the output signal of the current detection unit. When the inrush current occurs, the inverter high frequency switching circuit unit having the characteristics of high frequency soft switching, the gate signal processing unit controlling the switching element of the inverter high frequency switching circuit unit by receiving the output of the current detection unit, the AC output voltage and An inverter control circuit unit for sensing a current and controlling a gate signal processing unit, and a low pass filter unit connected to an output terminal of the inverter high frequency switching circuit unit for removing high frequency noise, the communication power inverter comprising: between the current detection unit and the gate signal processing unit The output signal from the current detector And by connecting the soft-start circuit for transmitting a gate signal processing unit, it characterized in that the load, such as office automation equipment to significantly limit the inrush current from the transient time to be applied.
제1도는 본 발명이 적용된 통신전원용 인버터를 나타낸 블럭도.1 is a block diagram showing an inverter for communication power supply to which the present invention is applied.
제2도는 본 발명 실시예의 소프트스타트회로를 나타낸 회로도.2 is a circuit diagram showing a soft start circuit according to the embodiment of the present invention.
제3(a)도는 통신전원용 인버터의 돌입전류의 파형도.3A is a waveform diagram of an inrush current of an inverter for communication power supply.
제3(b)도는 본 발명의 소프트스타트회로의 적용시의 통신전원용 인버터의 돌입전류의 파형도.Fig. 3 (b) is a waveform diagram of inrush current of an inverter for communication power supply when the soft start circuit of the present invention is applied.
제4도는 본 발명에 적용된 소프트 스위칭의 특성을 나타낸 전압파형도이다.4 is a voltage waveform diagram showing the characteristics of soft switching applied to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 전류검출부 20 : 게이트신호처리부,10: current detector 20: gate signal processor,
30 : 인버터 고주파스위칭회로부 40 : 인버터 제어회로부,30: inverter high frequency switching circuit portion 40: inverter control circuit portion,
50 : 로우패스필터부 A : 소프트스타트회로,50: low pass filter A: soft start circuit,
R1 ~ R11 : 저항 C1, C2 : 콘덴서,R1 to R11: resistors C1, C2: capacitors,
C : 전압비교기 OP : 연산증폭기.C: voltage comparator OP: operational amplifier.
이하, 본 발명의 실시예를 첨부된 도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
제1도는 본 발명이 적용된 통신전원용 인버터를 나타낸 블럭도로서, 통신용 직류전원(-48V,-24V)을 승압한 후에 흐르는 전류를 검출하여 이를 전압으로 변환하는 전류검출부(10)와, 전류검출부(10)의 출력신호에 따라 출력이 쇼트인 경우 게이트를 차단해주고 부하인가에 따른 돌입전류가 발생하는 경우 고주파 소프트 스위칭(Soft Switching)의 특성을 갖는 인버터 고주파스위칭회로부(30)와, 전류검출부(10)의 출력을 받아 인버터 고주파스위칭회로부(30)의 스위칭소자를 제어하는 게이트신호처리부(20)와, 교류출력전압 및 전류를 감지하여 게이트신호처리부(20)를 제어하는 인버터 제어회로부(40)와, 고주파 노이즈를 제거하기 위해 인버터 고주파스위칭회로부(30)의 출력단에 연결된 로우패스필터부(50)로 구성되는 통신전원용 인버터에 있어서, 전류검출부(10)와 게이트신호처리부(20) 사이에 연결되어 전류검출부(10)의 출력신호를 처리하여 게이트신호처리부(20)에 전달하는 소프트스타트회로(A)에 관한 것이다.1 is a block diagram showing an inverter for communication power supply to which the present invention is applied, and includes a current detector 10 for detecting a current flowing after boosting the communication DC power supplies (-48V and -24V) and converting it into a voltage. When the output is shorted according to the output signal of 10), the gate is cut off, and when the inrush current occurs due to the load applied, the inverter high frequency switching circuit unit 30 having the characteristics of high frequency soft switching and the current detector 10 A gate signal processing unit 20 for controlling the switching element of the inverter high frequency switching circuit unit 30 by receiving an output of the inverter, and an inverter control circuit unit 40 for controlling the gate signal processing unit 20 by sensing an AC output voltage and a current; In the inverter for a communication power supply composed of a low pass filter unit 50 connected to the output terminal of the inverter high frequency switching circuit unit 30 to remove high frequency noise, the current detection unit 10 and Byte signal processor is connected to between 20 processes the output signal of the current detecting section 10 relates to a soft start circuit (A) for transmitting a gate signal processor 20.
제2도는 전류검출부(10)의 출력단과 게이트신호처리부(20)의 입력단 사이에 연결되는 본 발명 실시예의 소프트스타트회로(A)를 나타낸 회로도로서, 전류검출부(10)의 출력단에 병렬로 연결된 저항(R2) 및 저항(R1,R3)이 연산증폭기(OP)의 각 입력단의 저항(R4)(R5)에 연결되어 있고, 상기 연산증폭기의 비반전단자(-)의 입출력단 사이에는 이득을 조정하기 위한 저항(R6)이 연결되어 있다.FIG. 2 is a circuit diagram showing a soft start circuit A according to an embodiment of the present invention connected between an output terminal of the current detector 10 and an input terminal of the gate signal processor 20. The resistor connected in parallel to the output terminal of the current detector 10 is shown in FIG. (R2) and resistors (R1, R3) are connected to the resistors (R4) (R5) of each input terminal of the operational amplifier (OP), the gain is adjusted between the input and output terminals of the non-inverting terminal (-) of the operational amplifier (OP) Resistor R6 is connected.
또한, 연산증폭기(OP)의 출력단은 저항(R7)(R8)을 통해 전압비교기(C)의 입력단(+)에, 그리고 저항(R7), 콘덴서(C1) 및 저항(R10)을 통해 상기 전압비교기(C)의 또다른 입력단(-)에 연결되고, 이 입력단(+)에는 기준전압을 제공하는 저항(R9, R11)이 콘덴서(C2) 및 전원(Vcc)과 함께 연결되어 있다.In addition, the output terminal of the operational amplifier OP is connected to the input terminal (+) of the voltage comparator C through the resistors R7 and R8 and through the resistor R7, the capacitor C1 and the resistor R10. It is connected to another input terminal (-) of the comparator C, and to the input terminal (+), resistors R9 and R11 providing a reference voltage are connected together with the capacitor C2 and the power supply Vcc.
전압비교기(C)의 출력단에는 게이트신호처리부(20)가 연결되어 있다.The gate signal processor 20 is connected to the output terminal of the voltage comparator C.
이와 같이 구성된 본 발명의 실시예의 통신전원용 인버터의 돌입전류제한을 위한 소프트스타트회로의 작용 및 효과를 상세히 설명하면 다음과 같다.The operation and effects of the soft start circuit for limiting the inrush current of the communication power inverter of the embodiment of the present invention configured as described above are as follows.
통신전원용 직류전원(-48V,-24V)을 승압한 후에 흐르는 전류를 검출하여 소정의 전압으로 변환하는 전류검출부(10)의 출력단에 직·병렬로 연결되어 있는 저항(R1 ~ R3)에 의해서 상기 전류검출부(10)에서 출력되는 전압이 분압된다.The resistors R1 to R3 are connected in series and in parallel with the output terminals of the current detector 10 for detecting and converting a current flowing after the voltage of the communication power supply (-48V, -24V) is boosted. The voltage output from the current detector 10 is divided.
분압된 전압은 저항(R4)(R5)을 거쳐 연산증폭기(OP)로 공급되며, 연산증폭기(OP)의 이득은 저항(R6)에 의해 조정된다.The divided voltage is supplied to the operational amplifier OP through the resistors R4 and R5, and the gain of the operational amplifier OP is adjusted by the resistor R6.
연산증폭기(OP)에 의해 증폭된 신호는 직렬로 연결된 저항(R7)(R8)을 거쳐 전압비교기(C)의 입력단(+)에 공급되고, 전압비교기(C)의 또다른 입력단(-)에는 직·병렬로 연결된 저항(R9 ~ R11)과 전원(Vcc)을 통해 기준전압을 공급한다.The signal amplified by the operational amplifier OP is supplied to an input terminal (+) of the voltage comparator C through resistors R7 and R8 connected in series, and to another input terminal (-) of the voltage comparator C. Supply the reference voltage through the resistor (R9 ~ R11) and power supply (Vcc) connected in series and parallel.
이때, 상기 연산증폭기(OP)의 출력단에 연결된 저항(R7)(R8) 사이에 병렬로 연결된 콘덴서(C1)는 연산증폭기(OP)에서 출력되는 신호의 고주파성분의 노이즈를 제거하기 위해 사용된다.In this case, the capacitor C1 connected in parallel between the resistors R7 and R8 connected to the output terminal of the operational amplifier OP is used to remove noise of the high frequency component of the signal output from the operational amplifier OP.
전압비교기(C)에서는 입력되는 두 개의 값을 비교하여 게이트신호처리부(20)로 출력하는데, 이 출력신호는 게이트신호처리부(20)의 출력신호에 따라 동작하는 인버터 고주파스위칭회로부(30)를 제어하기 위해 공급되는 신호이다.In the voltage comparator C, two input values are compared and output to the gate signal processing unit 20. The output signal controls the inverter high frequency switching circuit unit 30 operating according to the output signal of the gate signal processing unit 20. Is the signal supplied to
상기 게이트신호처리부(20)로 입력된 신호는 인버터 고주파스위칭회로부(30)의 스위칭소자로 사용되는 FET를 제어하기 위한 신호로 이용되는데, 출력이 쇼트인 경우에는 FET의 게이트를 차단해주고, 부가인가에 따른 돌입전류가 발생하는 경우에는 고주파 소프트 스위칭(Soft Switching)이 되도록 인버터 고주파스위칭회로부(30)를 제어한다.The signal input to the gate signal processing unit 20 is used as a signal for controlling the FET used as the switching element of the inverter high frequency switching circuit unit 30. When the output is short, the gate of the FET is blocked and added. When the inrush current occurs due to the high frequency soft switching (Soft Switching), the inverter high frequency switching circuit unit 30 is controlled.
상기 소프트 스위칭의 특성을 살펴보면, 도 4에 나타낸 바와 같이, 구간 1은 제어전원이 인가되지 않은 구간이고, 구간 2는 제어전원이 인가되어 소프트스타트회로가 동작하는 반면에 소프트 스위칭은 하지 않으므로 출력전압은 증가하지 않는 구간이고, 구간 3은 소프트스타트회로 및 소프트 스위칭이 동작되어 출력전압이 서서히 증가되는 구간이고, 구간 4는 소프트 스위칭의 완료구간으로 출력전압의 약 90 ~ 96% 정도에 해당되는 구간이며, 구간 5는 정상적인 출력전압을 갖는 구간이다.Looking at the characteristics of the soft switching, as shown in Figure 4, the section 1 is a section without the control power is applied, the section 2 is the control power is applied to operate the soft start circuit, while the soft switching does not perform the output voltage Is a period in which the output voltage is gradually increased by operating the soft start circuit and soft switching, and section 4 is a period in which the soft switching is completed and corresponds to about 90 to 96% of the output voltage. And section 5 is a section having a normal output voltage.
인버터 제어회로부(40)에서는 교류출력전압 및 전류를 감지하여 정상적인 교류출력이 되도록 상기 게이트신호처리부(20)를 제어한다.Inverter control circuit 40 detects the AC output voltage and current to control the gate signal processing unit 20 to be a normal AC output.
또한, 상기 인버터 고주파스위칭회로부(30)의 출력단에 연결된 로우패스필터부(50)에서는 인버터 고주파스위칭회로부(30)에서 출력되는 신호의 고주파 노이즈를 제거한다.In addition, the low pass filter unit 50 connected to the output terminal of the inverter high frequency switching circuit unit 30 removes high frequency noise of the signal output from the inverter high frequency switching circuit unit 30.
이처럼, 본 발명 실시예의 소프트스타트회로(A)를 사용하면, 제3(b)도에 나타낸 바와 같이, 소프트스타트회로를 사용하지 않았을 때 발생되는 돌입전류의 파형도를 나타낸 제3(a)도와 비교하여 볼 때 부하인가시 발생되는 돌입전류를 크게 감소시킬 수 있다.Thus, using the soft start circuit A of the embodiment of the present invention, as shown in FIG. 3 (b), a third (a) diagram showing a waveform diagram of the inrush current generated when the soft start circuit is not used. In comparison, inrush current generated during load application can be greatly reduced.
상기와 같은 본 발명은, 소프트스타트회로를 사용하여 사무자동화 기기 등의 부하가 통신전원용 인버터에 인가될 경우 과도적으로 발생하는 정격의 20 ~ 30배에 달하는 돌입전류를 3 ~ 4배로 낮춰줌으로써, 전원효율의 손실을 최소화할 수 있을 뿐만 아니라 인버터가 안정적으로 동작할 수 있도록 하는 효과가 있다.The present invention as described above, by using a soft start circuit to reduce the inrush current of 20 to 30 times the rating that occurs transiently when a load such as office automation equipment is applied to the communication power inverter by 3 to 4 times, In addition to minimizing the loss of power efficiency, the inverter can operate stably.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019960081002A KR100217521B1 (en) | 1996-12-31 | 1996-12-31 | A soft start circuit for limiting of a rush current in inverter |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019960081002A KR100217521B1 (en) | 1996-12-31 | 1996-12-31 | A soft start circuit for limiting of a rush current in inverter |
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