KR20000042629A - Booster type converter for controlling a parallel drive power-factor - Google Patents
Booster type converter for controlling a parallel drive power-factor Download PDFInfo
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- KR20000042629A KR20000042629A KR1019980058866A KR19980058866A KR20000042629A KR 20000042629 A KR20000042629 A KR 20000042629A KR 1019980058866 A KR1019980058866 A KR 1019980058866A KR 19980058866 A KR19980058866 A KR 19980058866A KR 20000042629 A KR20000042629 A KR 20000042629A
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- voltage
- switching
- current
- power factor
- rectifier
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- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 238000009499 grossing Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
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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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4283—Arrangements for improving power factor of AC input by adding a controlled rectifier in parallel to a first rectifier feeding a smoothing capacitor
-
- 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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4233—Arrangements for improving power factor of AC input using a bridge converter comprising active switches
-
- 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
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of AC power input into DC 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 thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of AC power input into DC 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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/17—Conversion of AC power input into DC 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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only arranged for operation in parallel
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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)
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
본 발명은 병렬구동 역률제어용 승압형 컨버터에 관한 것으로, 특히 스위칭 소자를 병렬 구동함으로써 스위칭 주파수를 증가 시켜 EMI를 저감하고, 또한 큰 동작주파수에 의해 초크코일의 크기를 줄이며 스위칭 소자에 흐르는 전류를 줄여 스위칭 소자의 전류정격을 낮출 수 있게 하는 병렬구동 역률제어용 승압형 컨버터에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step-up converter for parallel drive power factor control, and in particular, by driving the switching elements in parallel to reduce the EMI by increasing the switching frequency, and also to reduce the size of the choke coil and reduce the current flowing through the switching elements by the large operating frequency. The present invention relates to a step-up converter for parallel drive power factor control that can lower the current rating of a switching element.
도 1은 종래 역률제어 기능이 없는 전원공급 회로도로서, 이에 도시된 바와같이, 상용전원을 EMI필터/역률개선 필터(10)를 거쳐 입력받아 이를 정류하고 그 정류된 직류전압을 출력하는 정류부(11)와, 상기 정류부(11)에서 출력되는 직류전압을 필터링하여 부하(12)로 공급하는 필터용 커패시터(C)로 구성되는 것으로 이와 같이 구성된 종래 전원공급 회로의 동작 및 작용을 설명하면 다음과 같다.1 is a power supply circuit diagram without a conventional power factor control function. As shown in FIG. 1, a rectifier 11 receives commercial power through an EMI filter / power factor improvement filter 10 and rectifies it and outputs the rectified DC voltage. ), And a filter capacitor (C) for filtering the DC voltage output from the rectifier 11 to supply to the load 12 will be described below the operation and operation of the conventional power supply circuit. .
먼저, 전원공급단을 통해 상용전원과 그에 비례하는 도 2에서와 같은 상용 전류(
그러면 정류부(10)는 입력되는 상용전원을 브리지 다이오드를 이용하여 정류하여 직류전압으로 만들고, 이 정류된 직류전압을 필터용 커패시터(C)로 출력한다.Then, the rectifier 10 rectifies the input commercial power using a bridge diode to make a DC voltage, and outputs the rectified DC voltage to the filter capacitor C.
이때 상기 필터용 커패시터(C)에 공급되는 입력전류(IIN)는 도 2의 (b)에 도시한 바와같다.At this time, the input current I IN supplied to the filter capacitor C is as shown in FIG.
상기에서와 같은 입력전류(IIN)와 직류전압을 공급받은 필터용 커패시터(C)는 필터링하고, 그 필터링한 전압, 즉 도 2의 (a)에서와 같은 출력전압(Vo)을 부하(12)로 공급하여 동작하도록 하고, 이와 같이 동작하는 회로의 역률은 보통 0.4~0.7 사이의 수치를 갖는다.The filter capacitor C, which is supplied with the input current I IN and the DC voltage as described above, is filtered, and the filtered voltage, that is, the output voltage Vo as shown in FIG. ), And the power factor of the circuit operated in this way usually has a value between 0.4 and 0.7.
한편, 일반적인 온/오프 방식의 에어컨에는 역률개선용 커패시터(C)를 부착하여 역률을 개선하고, 인버터 에어컨에는 전자 방해 잡음(EMI : ElectroMagnetic Interface) 제거용 EMI 필터 다음 단에 역률 개선용 필터를 부착하여 역률 및 고조파를 줄이고 있다.On the other hand, in general on / off type air conditioner, power factor improvement capacitor (C) is attached to improve power factor, and inverter power conditioner is equipped with power factor improvement filter next to EMI filter for eliminating EMI (Electromagnetic Interface) To reduce power factor and harmonics.
그러나, 상기 종래 장치에 있어서의 펄스성 전류의 역률은 보통 0.6정도의 수치를 갖는데 이는 전송선로의 손실을 증가시키며, 역률 개선용 필터에 의해 크기가 증대되고 가격이 상승할 뿐 아니라 역률 개선용 필터의 전압강하에 의해 성능이 저하되며 또한, 가정에서는 역률이 낮으면 실효전력도 작아지기 때문에 에어컨과 같은 대용량의 제품을 사용할 수가 없고, 고조파 성분이 커서 국제 규격인 IEC 61000-3-2를 만족시킬 수 없게 되는 문제점이 있었다.However, the power factor of the pulsed current in the conventional apparatus usually has a numerical value of about 0.6, which increases the loss of the transmission line and increases the size and the price by the power factor improving filter as well as the power factor improving filter. In addition, performance is degraded due to the voltage drop of. In addition, low power factor reduces the effective power. Therefore, it is impossible to use a large-capacity product such as an air conditioner, and the harmonic content is large, which satisfies the international standard IEC 61000-3-2. There was a problem that became impossible.
따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 창출한 것으로, 스위칭 소자를 병렬 구동함으로써 스위칭 주파수를 증가시켜 EMI를 저감하고, 또한 동작주파수가 크게 되어 고가의 초크코일의 크기를 줄일 수 있고, 스위칭 소자의 전류가 반으로 줄기 때문에 스위칭 소자의 전류정격을 낮추어서 가격을 다운시킬 수 있는 병렬구동 역률제어용 승압형 컨버터를 제공 하는데 그 목적이 있다.Therefore, the present invention has been created to solve the above-described problems, and by driving the switching elements in parallel to increase the switching frequency to reduce the EMI, and also to increase the operating frequency to reduce the size of the expensive choke coil In addition, since the current of the switching element is cut in half, the object of the present invention is to provide a step-up converter for parallel driving power factor control which can lower the price by lowering the current rating of the switching element.
도 1은 종래 역률 제어 기능이 없는 전원공급 회로도.1 is a power supply circuit diagram without a conventional power factor control.
도 2는 상기 도 1에 대한 출력전압 및 입력전류에 대한 동작 파형도.2 is an operating waveform diagram of an output voltage and an input current of FIG. 1.
도 3은 본 발명의 병렬구동 역률제어용 승압형 컨버터에 대한 회로 구성도.Figure 3 is a circuit diagram of a boost converter for parallel drive power factor control of the present invention.
도 4는 스위칭 한 주기 동안의 스위칭상태 및 전류전압 파형도.4 is a diagram showing switching states and current voltage waveforms during one switching cycle.
***도면의 주요 부분에 대한 부호의 설명****** Description of the symbols for the main parts of the drawings ***
20 : 정류부 21 : 스위칭부20: rectifier 21: switching unit
22 : 부하 23 : 전류 검출부22: load 23: current detector
24 : 입력전압 검출부 25 : 출력전압 검출부24: input voltage detector 25: output voltage detector
26 : 스위칭 구동부 27 : 역률제어 회로부26 switching driver 27 power factor control circuit
S1,S2 : 스위칭 소자 C : 커패시터S1, S2: switching element C: capacitor
Rs : 저항 D1,D2 : 다이오드Rs: Resistor D1, D2: Diode
이와 같은 목적을 달성하기 위한 본 발명은, 입력되는 상용 전원을 정류하고 그 정류된 전압을 출력하는 정류부와; 상기 정류부에서 출력되는 전압에 대해 스위칭동작에 의해 역률을 개선하도록 한 스위칭부와; 상기 스위칭부에서 출력하는 전압을 필터링하여 부하로 공급하기 위한 평활 커패시터와; 입력되는 전류를 검출하는 전류 검출부와; 입력되는 전압을 검출하는 입력전압 검출부와; 상기 부하 동작시 발생하는 출력전압을 검출하는 출력전압 검출부와; 스위칭 펄스를 출력하여 상기 스위칭부를 구동하는 스위칭 구동부와; 상기 검출부를 통해 검출한 전류 및 전압값을 이용하여 상기 스위칭 구동부를 제어하기 위한 역률 제어 회로를 구비하여 달성되는 것을 특징으로 한다.The present invention for achieving the above object, Rectifying unit for rectifying the input commercial power and outputs the rectified voltage; A switching unit configured to improve the power factor by a switching operation with respect to the voltage output from the rectifying unit; A smoothing capacitor for filtering and supplying the voltage output from the switching unit to the load; A current detector for detecting an input current; An input voltage detector for detecting an input voltage; An output voltage detector for detecting an output voltage generated during the load operation; A switching driver for outputting a switching pulse to drive the switching unit; And a power factor control circuit for controlling the switching driver by using the current and voltage values detected by the detector.
이하, 첨부한 도면에 의거하여 상세히 살펴보면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도 3은 본 발명 병렬구동 역률제어용 승압형 컨버터에 대한 회로 구성도로서, 이에 도시한 바와같이, 입력되는 상용 전원을 정류하고 그 정류된 전압을 출력하는 정류부(20)와; 상기 정류부(20)에서 출력되는 전압에 대해 스위칭동작에 의해 역률을 개선하도록 한 스위칭부(21)와; 상기 스위칭부(21)에서 출력하는 전압을 필터링하여 부하(22)로 공급하기 위한 평활 커패시터(C)와; 상기 정류부(20)를 통해 인덕터(L)로 흐르는 전류를 검출하는 전류 검출부(23)와; 상기 정류부(20)에서 부하(22)측으로 공급되는 입력전압을 검출하는 입력전압 검출부(24)와; 상기 부하(22)에 공급되는 전압을 검출하는 출력전압 검출부(25)와; 스위칭 펄스를 출력하여 스위칭부(21)의 스위칭소자(S1,S2)의 온/오프동작을 제어하는 스위칭 구동부(26)와; 상기 검출부(23~25)에서 검출된 전류 및 전압에 따라 상기 스위칭 구동부(26)의 동작을 제어하는 역률제어 회로(27)로 구성한다.3 is a circuit configuration diagram of a boost converter for parallel drive power factor control according to the present invention, and as shown therein, a rectifier 20 for rectifying an input commercial power and outputting the rectified voltage; A switching unit 21 for improving the power factor by a switching operation with respect to the voltage output from the rectifying unit 20; A smoothing capacitor (C) for filtering the voltage output from the switching unit (21) and supplying it to the load (22); A current detector (23) for detecting a current flowing through the rectifier (20) to the inductor (L); An input voltage detector 24 for detecting an input voltage supplied from the rectifier 20 to the load 22 side; An output voltage detector 25 detecting a voltage supplied to the load 22; A switching driver 26 for outputting a switching pulse to control the on / off operation of the switching elements S1 and S2 of the switching unit 21; The power factor control circuit 27 controls the operation of the switching driver 26 according to the current and voltage detected by the detectors 23 to 25.
상기 스위칭부(21)는, 병렬연결된 제1,2스위칭소자(S1,S2)와 병렬연결된 제1,2 다이오드(D1,D2)가 인덕터(L)를 통해 정류부(20)에 서로 병렬 연결되어 구성한 것으로 이와같이 구성된 본 발명의 동작 및 작용 효과에 대하여 상세히 설명하면 다음과 같다.The switching unit 21 has the first and second diodes D1 and D2 connected in parallel with the first and second switching elements S1 and S2 connected in parallel to each other in parallel with the rectifier 20 through the inductor L. When described in detail with respect to the operation and effect of the present invention configured as described above as follows.
도 3에서, 상용전원이 공급되면 이를 정류부(20)에서 입력받아 정류하고, 그 정류된 직류전압을 부하측으로 공급하고, 전류는 인덕터(L)로 공급된다.In FIG. 3, when commercial power is supplied, it is rectified by the rectifier 20, the rectified DC voltage is supplied to the load side, and the current is supplied to the inductor L.
그러면 전류 검출부(23)는 부하(22)측으로 흐르는 전류를 검출저항(Rs)을 통해 검출하여 역률제어 회로(27)로 출력하고, 입력전압 검출부(24)는 부하(22)측으로 공급되는 입력 전압을 검출하여 상기 역률제어 회로부(26)로 출력하고, 또한 출력전압 검출부(25)는 부하(22)에 공급되어 동작시 발생하는 출력전압을 검출하여 역률제어 회로(27)로 출력한다.Then, the current detector 23 detects the current flowing to the load 22 side through the detection resistor Rs and outputs it to the power factor control circuit 27, and the input voltage detector 24 supplies the input voltage supplied to the load 22 side. Is detected and output to the power factor control circuit 26, and the output voltage detector 25 is supplied to the load 22 to detect the output voltage generated during operation and output to the power factor control circuit 27.
이에 상기 역률제어 회로부(27)는 각 검출부(23~25)에서 공급되는 전류 및 전압을 이용하여 스위칭 구동부(26)에 제어신호를 출력하여 스위칭부(21)에 그에 따른 스위칭 펄스를 출력하여 스위칭 소자(S1,S2)를 온/오프 제어한다.Accordingly, the power factor control circuit unit 27 outputs a control signal to the switching driver 26 using the current and voltage supplied from each detector 23 to 25 to output the switching pulse according to the switching unit 21 to switch. The elements S1 and S2 are controlled on / off.
다시 말해, 상용전원을 정류부(20)로 정류하면 그 출력측으로 입력전원 주파수(50/60Hz)의 두배의 주파수를 갖는 맥류전압(VIN)이 출력된다.In other words, when the commercial power is rectified to the rectifier 20, the pulse voltage V IN having a frequency twice the input power frequency (50/60 Hz) is output to the output side.
이 전압을 입력으로 해서 스위칭 소자(S1,S2)를 동시에 스위칭해주면 인덕터(L)에는 입력전압(VIN)과 동상인 전류가 흐르고, 상용전원에서 보면 50/60Hz의 입력전압에 동상인 싸인파 전류가 흘러서 역률이 거의 1.0에 가깝게 된다.When the switching elements S1 and S2 are simultaneously switched using this voltage, a current in phase with the input voltage V IN flows through the inductor L. A sine wave in phase with an input voltage of 50/60 Hz is seen from a commercial power supply. The current flows to a power factor close to 1.0.
이 경우 출력전압은 입력전압(VIN)의 피크치보다 큰 전압이 되고, 이는 출력전압 검출부(25)를 통해서 검출되어 출력전압이 설정치로 안정하게 동작하도록 제어해준다.In this case, the output voltage becomes a voltage larger than the peak value of the input voltage V IN , which is detected through the output voltage detector 25 to control the output voltage to operate stably.
역률제어 회로(27)는 인덕터의 전류(IL)가 입력전압(VIN)을 추종하도록 해주는 부분으로 입력전압 검출부(24)와 입력전류 검출부(23)의 정보를 가지고 제어를 해주게 된다. 입력전압 검출부(24)의 정보는 기준 파형을 제공해 주고, 입력전류 검출부(23)는 현재의 제어해야할 전류의 정보를 주어서 역률제어 회로(27)에서 이를 비교하여 전류가 기준이 되는 전압 파형을 추종할 수 있도록 제어하게 된다.The power factor control circuit 27 allows the current I L of the inductor to follow the input voltage V IN to control the information with the information of the input voltage detector 24 and the input current detector 23. The information of the input voltage detector 24 provides a reference waveform, and the input current detector 23 gives information of current to be controlled and compares it in the power factor control circuit 27 to follow the voltage waveform on which the current is a reference. To control it.
또한, 상기 스위칭 소자(S1,S2)는 20KHz이상의 높은 주파수로 동작하기 때문에 각 스위칭시에 인덕터의 전류(IL)는 전류원과 같은 역할을 하게 된다.In addition, since the switching elements S1 and S2 operate at a high frequency of 20 KHz or more, the current I L of the inductor acts as a current source during each switching.
따라서, 만약 스위칭 소자(S1,S2)와 다이오드(D1,D2) 및 각 수동소자(L,C)가 이상적이라고 가정하면 역률제어용 승압형 컨버터의 미세동작은 다음과 같다.Therefore, if it is assumed that the switching elements (S1, S2), diodes (D1, D2) and each passive element (L, C) is ideal, the fine operation of the step-up converter for power factor control is as follows.
도4와 같이 먼저 스위칭 소자(S1,S2)를 동시에 온하면 인덕터(L)에는 입력전압(VIN)이 걸리고 전류가 선형적으로 상승한다.As shown in FIG. 4, when the switching elements S1 and S2 are turned on at the same time, the input voltage V IN is applied to the inductor L and the current increases linearly.
이때 평활 커패시터(C)는 부하(22)에 파워를 공급하고, 스위칭 구동부(26)의 제어에 의해서 스위칭 소자(S1,S2)가 동시에 오프되면 다이오드(D1,D2)가 도통하여 인덕터(L)에는 (커패시터 충전전압(V0)-입력전압(VIN))이 위의 경우와는 반대방향으로 인덕터(L)에 걸리고 인덕터의 전류(IL)는 선형적으로 감소한다.At this time, the smoothing capacitor C supplies power to the load 22, and when the switching elements S1 and S2 are simultaneously turned off under the control of the switching driver 26, the diodes D1 and D2 conduct and the inductor L (Capacitor charge voltage (V 0 )-input voltage (V IN )) is applied to the inductor L in the opposite direction to the above case, and the inductor current I L decreases linearly.
이 경우 입력에서 출력으로 파워를 공급하여 평활 커패시터(C)를 충전하게 되고, 이와 같은 동작을 반복하여 인덕터의 전류(IL)가 도4와 같이 입력전압의 모양을 추종하도록하여 역률을 개선하게 된다.In this case, the smoothing capacitor C is charged by supplying power from the input to the output, and the same operation is repeated to improve the power factor by allowing the current I L of the inductor to follow the shape of the input voltage as shown in FIG. 4. do.
이상에서 설명한 바와 같이 본 발명 병렬구동 역률제어용 승압형 컨버터는 스위칭 소자를 병렬로 구동함으로써 스위칭 주파수를 증가시켜 EMI를 저감하고, 또한 동작주파수가 커지게 되어 고가의 초크코일의 크기를 줄일 수 있고, 스위칭 소자에 흐르는 전류가 반으로 줄기 때문에 스위칭 소자의 전류정격을 낮추어서 가격을 다운시킬 수 있는 효과가 있다.As described above, the step-up converter for parallel driving power factor control according to the present invention drives switching elements in parallel to increase the switching frequency to reduce EMI, and also to increase the operating frequency, thereby reducing the size of expensive choke coils. Since the current flowing through the switching element is cut in half, the current rating of the switching element is lowered, thereby reducing the price.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980058866A KR20000042629A (en) | 1998-12-26 | 1998-12-26 | Booster type converter for controlling a parallel drive power-factor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980058866A KR20000042629A (en) | 1998-12-26 | 1998-12-26 | Booster type converter for controlling a parallel drive power-factor |
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| Publication Number | Publication Date |
|---|---|
| KR20000042629A true KR20000042629A (en) | 2000-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019980058866A KR20000042629A (en) | 1998-12-26 | 1998-12-26 | Booster type converter for controlling a parallel drive power-factor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010047908A (en) * | 1999-11-24 | 2001-06-15 | 이구택 | An apparatus for a removing harmonics of the power system |
| KR100757484B1 (en) * | 2002-03-08 | 2007-09-11 | 주식회사 엘지이아이 | A power factor correction circuit and method of inverter air conditioner |
| KR100928010B1 (en) * | 2007-09-10 | 2009-11-24 | 삼성전기주식회사 | Driving voltage control circuit and method |
-
1998
- 1998-12-26 KR KR1019980058866A patent/KR20000042629A/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010047908A (en) * | 1999-11-24 | 2001-06-15 | 이구택 | An apparatus for a removing harmonics of the power system |
| KR100757484B1 (en) * | 2002-03-08 | 2007-09-11 | 주식회사 엘지이아이 | A power factor correction circuit and method of inverter air conditioner |
| KR100928010B1 (en) * | 2007-09-10 | 2009-11-24 | 삼성전기주식회사 | Driving voltage control circuit and method |
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