KR101117419B1 - A power supply device which uses an input power to the feedback - Google Patents

A power supply device which uses an input power to the feedback Download PDF

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KR101117419B1
KR101117419B1 KR1020040043407A KR20040043407A KR101117419B1 KR 101117419 B1 KR101117419 B1 KR 101117419B1 KR 1020040043407 A KR1020040043407 A KR 1020040043407A KR 20040043407 A KR20040043407 A KR 20040043407A KR 101117419 B1 KR101117419 B1 KR 101117419B1
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South Korea
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power
power supply
value
unit
voltage
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KR1020040043407A
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Korean (ko)
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KR20050118323A (en
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최재철
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최재철
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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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33515—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with digital control
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • 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
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • 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
    • 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
    • H02M1/0009—Devices or circuits for detecting current in a converter

Abstract

본 발명은 전원 공급 장치에 유입되는 입력 전력을 읽어서 그 신호값을 설정된 기준 전압과 비교하여 펄스 변조 제어부나 정전압 제어부에 인가하여 스위칭 구동부를 제어하고 출력측 부하가 환경 조건에 변화가 심하거나 동적 부하 변동을 가졌더라도 입력 전력을 일정하게 제어하여 출력을 안정하게 제어하는 방식이다. 특히 마그네트론 같은 동적인 변동을 가지는 부하를 제어할 때나 램프 구동용 전원 장치같은 입력 전력을 일정하게 유지시켜야 할 목적을 가진 전원 장치에 적용한다.
The present invention reads the input power flowing into the power supply and compares the signal value with the set reference voltage and applies it to the pulse modulation control unit or the constant voltage control unit to control the switching driver, and the output side load is severely changed in environmental conditions or the dynamic load fluctuations. Even though it has, the input power is constantly controlled to control the output stably. In particular, it is applied to a power supply unit for the purpose of controlling a load having dynamic fluctuations such as a magnetron or for keeping the input power constant such as a lamp driving power supply unit.

S.M.P.S (Switching Mode Power Supply)       S.M.P.S (Switching Mode Power Supply)

Description

입력 전력을 피드백으로 사용하는 전원 공급 장치{A power supply device which uses an input power to the feedback}A power supply device which uses an input power to the feedback}

도1은 전원 공급 장치의 일종인 종래의 S.M.P.S 회로의 블록도.1 is a block diagram of a conventional S.M.P.S circuit, which is a kind of power supply.

도2는 본 발명에 따른 입력 전력 피드백 회로가 적용된 전원 공급 장치의 일종인 S.M.P.S 회로의 블록도.2 is a block diagram of an S.M.P.S circuit, which is a type of power supply apparatus to which an input power feedback circuit according to the present invention is applied.

도3은 본 발명에 따른 입력 전력 피드백 회로가 적용된 전원 공급 장치의 일종인 리니어 전원 회로의 블록도.3 is a block diagram of a linear power supply circuit, which is a kind of power supply device to which an input power feedback circuit according to the present invention is applied.

도1은 종래의 전원 공급 장치의 일종인 S.M.P.S의 피드백 방식이다. 도1에서는 종래의 대표적인 피드백 회로의 블록도이다. 도1에 도시된 종래의 피드백 회로는 노이즈 필터부(2)와 돌입 방지부(3)와 정류?평활부(4)와 스위칭 구동부(5)와 정류?평활부(6)와 제어부(9)와 전달 소자(8)와 펄스폭 변조 제어부(7)로 구성된다. 여기서 피드백은 출력부(11)에서 전압을 읽어서 제어부(9)에서 설정된 전압값과 비교하여 전달 소자(8)를 거쳐 그 신호를 펄스폭 변조 제어부(7)에 인가하면 펄스폭 변조 제어부(7)에서 스위칭 듀티값을 변조하여 스위칭 구동부(5)에서 전력을 전달하여 정해진 출력 부하(10)에 일정한 전압과 정해진 부하 전류를 유지하게 된다. 이 방식은 부하가 주위 환경에 정적으로 움직이면 부하측의 전류, 전압이 일정하게 유지되며 입력 전압에 따라 입력 전력은 다소 변화하지만 출력측에는 영향을 주지 않는다. 하지만 주위 환경에 따라 동적으로 변화하는 부하 즉 마그네트론같은 부하는 출력부(11)에서 피드백을 받으면 부하값이 동적으로 변해 출력부(11)의 전압, 전류 변동이 심하며 그에 따른 입력 전력의 변화도 심해지게 된다. 따라서 부하를 일정한 소비 전력으로 제어가 어렵고 특히 램프 같은 경우는 밝기를 일정하게 유지시키기 어려운 단점이 있다.1 is a feedback method of S.M.P.S, which is a kind of a conventional power supply device. 1 is a block diagram of a typical representative feedback circuit. The conventional feedback circuit shown in FIG. 1 includes the noise filter unit 2, the inrush prevention unit 3, the rectifying and smoothing unit 4, the switching driver 5, the rectifying and smoothing unit 6, and the control unit 9. And a transfer element 8 and a pulse width modulation control unit 7. In this case, the feedback is read from the output unit 11 and compared with the voltage value set in the control unit 9. The signal is applied to the pulse width modulation control unit 7 via the transfer element 8. In this case, the switching duty value is modulated to transmit power from the switching driver 5 to maintain a predetermined voltage and a predetermined load current in the predetermined output load 10. In this method, if the load moves statically to the surrounding environment, the current and voltage on the load side are kept constant. The input power varies slightly depending on the input voltage, but does not affect the output side. However, a load that dynamically changes according to the surrounding environment, that is, a load such as a magnetron, receives a feedback from the output unit 11, and the load value dynamically changes, causing a great change in voltage and current of the output unit 11, and a corresponding change in input power. You lose. Therefore, it is difficult to control the load with a constant power consumption, and particularly in the case of a lamp, it is difficult to keep the brightness constant.

따라서 정해진 구간에서의 입력 전압 변동 및 주위 환경 변화에서 동적으로 변화하는 부하는 입력 전력을 피드백 받아 일정한 입력 전력을 유지하면 안정적인 부하 동작을 유지할 수 있다.Therefore, the load dynamically changing in the input voltage fluctuation in the predetermined section and the change in the surrounding environment receives the input power and maintains the constant input power to maintain stable load operation.

상기 목적을 달성하기 위하여 일반적으로 사용되는 전원 공급 장치 즉 S.M.P.S, 직류 전원 장치, 인버터, 전자식 안정기 중에서 도2와 같이 S.M.P.S에 이 발명의 실시 예로하여 설명한다. 도2에 나와 있는 전원 공급 장치는 일반적으로 사용되는 입력부(30), 라인 필터부(32), 돌입 방지부(33), 정류?평활부(34), 스위칭 구동부(35), 정류?평활부(36)같은 구성부에 본 발명의 실시 구성을 위한 전력 측정부(100), 검출 소자(31), 전달 소자(37), 전압 설정 비교부(200), 전달 소자(38), 펄스폭 변조 제어부(40)로 구성되어진다. 동작 원리는 입력부(30) 라인측에 서 검출 소자(31)를 이용하여 입력 라인에 흘러가는 전류를 전압값으로 변경하여 전력 측정부(100)에 센싱되어 아날로그 값을 디지털 값으로 바꾸는 A/D컨버터(51)를 거쳐 역률에 대한 보상을 위한 위상 보정부(53)를 거치게 된다. 그리고 입력 전압을 센싱하여 아날로그 값을 디지털 값으로 바꾸는 A/D컨버터(50)를 거친다. 이렇게 센싱된 전압, 전류값을 멀티 플렉스(54)하면 입력 전력값이 측정된다. 이 측정된 전력값을 디지털 값에서 아날로그 값으로 바꾸는 D/A컨버터(55)를 거쳐 입력 라인 고압부와 신호 라인의 절연을 위해 전달 소자(37)를 거친다. 전달 소자(37)를 거친 값을 전압 설정 비교부(200)내의 평활부(41)를 거치면 안정된 직류 전압을 가지게 된다. 이 직류 전압과 설정하고자 하는 전력값의 기준 전압값(57)과 비교하고 그 비교 데이터를 다시 전달 소자(38)를 거쳐 펄스폭 제어부(40)에 전달된다. 펄스폭 제어부(40)에서는 전달 소자(38)에서 들어온 값의 높음과 낮음에 따라 스위칭 주파수 또는 듀티를 변경시켜 입력 전력이 일정하게 유지시키게 되며 입력 소비 전력이 일정하게 됨으로 인해 부하(39)도 안정된 전력을 소비하게 된다. 특히 부하(39)가 환경 변화에 심하게 변하는 마그네트론은 상기 피드백 제어 회로를 사용하면 출력측이 안정하게 동작된다. 또 다른 직류 공급 장치의 일종인 인버터나 전자식 안정기도 구성 블록은 S.M.P.S와 동일하며 용도가 다른 형태이다. 또 다른 예시 도3은 철심형 변압기를 사용하는 전원 공급 장치에 본 발명을 실시 적용한 예이다. 구성은 입력(70), 검출 소자(71), 변압부(72), 정류?평활부(73), 전압 제어부(74), 부하(75), 전력 검출부(300), 전달 소자(76), 평활부(77)로 구성된다. 동작원리는 입력 라인측에서 검출된 전압?전류값이 전력 검출부(300)에서 측정된 전력 값이 전달 소자(76)로 전달되고 그 값이 평활부(77)에서 평활된 직류 전압값이 되어 전압 제어부(74)로 인가되면 그 전압 제어부(74)내에 있는 비교기(79)에서 기준 전압(80)과 비교하여 제어 소자(81)을 제어함으로써 부하(75)에 전달되는 전력을 제어함으로써 입력 전력을 일정하게 유지하게 된다.In order to achieve the above object, S.M.P.S, which is generally used, is a S.M.P.S. DC power supply, an inverter, an electronic ballast, and the like will be described as an embodiment of the present invention. The power supply shown in FIG. 2 is generally used input unit 30, line filter unit 32, inrush prevention unit 33, rectification and smoothing unit 34, switching drive unit 35, rectifying and smoothing unit A power measuring unit 100, a detection element 31, a transfer element 37, a voltage setting comparison unit 200, a transfer element 38, a pulse width modulation for an embodiment of the present invention in the same configuration portion The control unit 40 is configured. The operating principle is an A / D that changes the current flowing through the input line to the voltage value by using the detection element 31 on the input side 30 line side and is sensed by the power measuring unit 100 to change the analog value into a digital value. The converter 51 passes through a phase correction unit 53 for compensating for the power factor. The A / D converter 50 senses an input voltage and converts an analog value into a digital value. When the sensed voltage and current values are multiplexed (54), the input power value is measured. The measured power value is passed through the transfer element 37 to insulate the input line high voltage part and the signal line via a D / A converter 55 which converts the digital value into an analog value. When the value passed through the transfer element 37 passes through the smoothing part 41 in the voltage setting comparison part 200, the voltage has a stable DC voltage. The DC voltage is compared with the reference voltage value 57 of the power value to be set, and the comparison data is transmitted to the pulse width control unit 40 via the transfer element 38 again. In the pulse width control unit 40, the input power is kept constant by changing the switching frequency or duty according to the high and low values of the value input from the transfer element 38, and the load 39 is stable because the input power consumption is constant. Power consumption. In particular, the magnetron, in which the load 39 is severely changed by environmental changes, is operated stably on the output side when the feedback control circuit is used. An inverter or electronic ballast, which is another type of DC supply device, has the same block structure as S.M.P.S and has a different purpose. 3 is an example in which the present invention is applied to a power supply using an iron core transformer. The configuration is the input 70, the detection element 71, the transformer 72, the rectifying and smoothing unit 73, the voltage control unit 74, the load 75, the power detector 300, the transfer element 76, It consists of the smooth part 77. The operation principle is that the voltage and current value detected at the input line side are transferred to the transfer element 76 with the power value measured by the power detector 300, and the value becomes a smoothed DC voltage value at the smoothing unit 77. When applied to the control unit 74, the comparator 79 in the voltage control unit 74 controls the control element 81 in comparison with the reference voltage 80 to control the power delivered to the load 75 to control the input power. Will remain constant.

이 발명에 의해 동적으로 변동되는 부하나 입력 전력을 일정하게 유지해야 하거나 램프의 밝기를 입력 전압의 변동 또는 환경이 변화해도 일정한 전력으로 일정한 밝기를 유지시켜야하는 전원 공급 장치에 적용함으로써 정확한 밝기를 유지할 수 있다.The present invention maintains accurate brightness by applying a constantly changing load or input power, or by applying a brightness of a lamp to a power supply that must maintain a constant brightness at a constant power even when the input voltage fluctuates or the environment changes. Can be.

Claims (3)

상용 교류 전원을 사용하는 전원 공급 장치로 직류 전원을 정류하는 정류부와 상기 정류부에 의해 정류된 교류 전원을 1차 코일을 통해 2차 코일로 유기 전달되는 변압기와 1차 코일에 연결되어 스위칭하는 제어부와 그 제어부를 제어하는 펄스폭 변조 수단을 포함하는 전원 공급 장치의 일종인 S.M.P.S에 있어서 펄스폭 변조 제어를 위한 피드백 신호를 만들기 위한 상용 교류 라인측의 전류 검출부와 전압 검출부 : 상기 검출된 전압, 전류값이 A/D 컨버터를 거쳐 디지털 값으로 변환된 것을 역률 보정하여 멀티 플렉스한 값을 D/A 컨버터를 거쳐 신호 출력부와 그 출력부를 전달 소자로 전달되는 전달부와 상기 전달부에서 나온 신호를 피드백 신호를 사용하여 일정 입력 전력을 제어하는 회로.A power supply using commercial AC power, a rectifying unit rectifying DC power, and a control unit connected to and switching the AC power rectified by the rectifying unit to the transformer and the primary coil organically transferred to the secondary coil through the primary coil; In the SMPS which is a kind of power supply including pulse width modulation means for controlling the control part, a current detector and a voltage detector on a commercial AC line side for producing a feedback signal for pulse width modulation control: the detected voltage and current value The power factor correction of the conversion of the digital value through the A / D converter and the multiplexed value is passed through the D / A converter to the signal output unit and the output unit to the transfer element and the signal from the transfer unit is fed back. Circuit that uses a signal to control a constant input power. 제1항에서 나온 피드백 신호를 전압값으로 변환하여 설정 전압값과 비교하고 그 값을 전달 소자로 펄스폭 변조 제어부에 전달하여 스위칭 구동부의 듀티비 또는 주파수를 변화시켜 일정 입력 전력을 유지하는 전원 공급 장치.A power supply for converting the feedback signal from claim 1 into a voltage value and comparing it with a set voltage value and transferring the value to a pulse width modulation controller as a transfer element to change the duty ratio or frequency of the switching driver to maintain a constant input power. Device. 제1항에서 나온 피드백 신호를 카운트하여 설정된 카운트 값과 비교하고 그 비교된 값을 펄스 폭 변조 제어부에 전달해 스위칭 구동부의 듀티비 또는 주파수를 변화시켜 일정 입력 전력을 유지하는 전원 공급 장치.The power supply device which counts the feedback signal of claim 1 and compares it with the set count value, and transmits the compared value to the pulse width modulation controller to change the duty ratio or frequency of the switching driver to maintain a constant input power.
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US5847942A (en) 1996-05-30 1998-12-08 Unitrode Corporation Controller for isolated boost converter with improved detection of RMS input voltage for distortion reduction and having load-dependent overlap conduction delay of shunt MOSFET
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