KR100946348B1 - Power factor correction of power supply - Google Patents

Power factor correction of power supply Download PDF

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KR100946348B1
KR100946348B1 KR1020080005691A KR20080005691A KR100946348B1 KR 100946348 B1 KR100946348 B1 KR 100946348B1 KR 1020080005691 A KR1020080005691 A KR 1020080005691A KR 20080005691 A KR20080005691 A KR 20080005691A KR 100946348 B1 KR100946348 B1 KR 100946348B1
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current
power
boosting
power supply
current limiting
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KR1020080005691A
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Korean (ko)
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KR20090079597A (en
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조신
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엘지이노텍 주식회사
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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
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
    • 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
    • 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
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • 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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

본 발명은 전원공급장치의 역률개선회로에 관한 것이다. The present invention relates to a power factor improvement circuit of a power supply.

본 발명의 실시예는 교류전원을 직류전원으로 정류시켜 부하 측에 제공하는 전원공급장치의 역률개선회로에 있어서, 정류부를 통해 입력되는 전류를 승압시키는 승압수단; 상기 정류부를 통해 입력되는 돌입전류를 제한하는 전류제한수단; 상기 승압수단으로부터 여기되는 전류값을 검출하는 전류검출수단; 상기 전류검출수단에서 검출되는 전류의 양에 따라 스위칭 동작하면서 전류를 상기 전류제한수단으로 흐르게 하거나, 우회시키는 스위칭수단1을 포함하여서 된 것이다. An embodiment of the present invention provides a power factor improvement circuit of a power supply device for rectifying an AC power source into a DC power source and providing the same to a load side, comprising: boosting means for boosting a current input through the rectifying unit; Current limiting means for limiting inrush current inputted through the rectifier; Current detecting means for detecting a current value excited from the boosting means; And switching means 1 for flowing or bypassing the current to the current limiting means while switching operation in accordance with the amount of current detected by the current detecting means.

본 발명의 실시예는 전원공급장치의 기동 시 또는 과전류 시 동작하여 손실로 인한 발열을 저감시킬 수 있다.The embodiment of the present invention can reduce the heat generated by the loss by operating at the time of starting the power supply or during overcurrent.

Description

전원공급장치의 역률개선회로 {POWER FACTOR CORRECTION OF POWER SUPPLY}Power Factor Correction Circuit of Power Supply Unit {POWER FACTOR CORRECTION OF POWER SUPPLY}

도 1은 본 발명의 일실시예에 따른 구성을 간략히 도시한 블럭도.1 is a block diagram schematically showing a configuration according to an embodiment of the present invention.

도 2는 본 발명의 일실시예에 따른 구성을 보다 구체적으로 도시한 회로도.2 is a circuit diagram showing in more detail the configuration according to an embodiment of the present invention.

<도면의 주요부분에 대한 부호 설명><Description of Signs of Major Parts of Drawings>

10 : 역률개선회로10: power factor improvement circuit

11 : 승압수단11: boosting means

12 : 전류제한수단12: current limiting means

13 : 전류검출수단13 current detecting means

14 : 스위칭수단114: switching means 1

본 발명은 전원공급장치에 관한 것이다. The present invention relates to a power supply.

일반적으로, 전기 및 전자기기의 소형화에 따라 그 기기에 구동전력을 안정하게 공급하는 전원장치에 대해서도 소형화에 대한 요구가 매우 높아 대부분의 전원장치가 스위칭 방식으로 바뀌고 있다.In general, according to the miniaturization of electric and electronic devices, the demand for miniaturization is very high even for a power supply device that stably supplies driving power to the device, and thus, most power supply devices are switched to a switching method.

상기 스위칭 전원장치는 그 대부분이 커패시터 입력형 정류회로를 사용함으로써 상용 전원의 피크치 부분의 짧은 기간 동안만 정류부가 도통하여 폭이 좁은 펄스성 전류 파형을 발생하게 한다.The switching power supply uses a capacitor input rectifier circuit, most of which causes the rectifier to conduct only a short period of the peak portion of the commercial power supply to generate a narrow pulsed current waveform.

이러한 펄스성 전류는 많은 고조파 성분을 발생시킬 뿐만 아니라 입력 역률의 저하를 초래하는 원인이 되었다. 특히, 최근 가전제품, 사무기기 등 스위칭 전원이 내장된 전기 및 전자기기의 동시 사용이 급증함에 따라 앞서 언급한 펄스성 전류에 의한 고조파의 증가 및 역률의 저하가 전력계통에 심각한 영향을 미칠 수 있는 가능성이 매우 높아지게 되었다.This pulsed current not only generates many harmonic components but also causes a decrease in input power factor. In particular, as the simultaneous increase in the simultaneous use of electric and electronic devices with built-in switching power supplies such as home appliances and office equipment, the increase in harmonics and power factor deterioration caused by the aforementioned pulsed current may seriously affect the power system. The possibilities are very high.

이에 대한 대책으로서 IEC 등 국제기구는 16A/상 이상의 기기를 대상으로 하는 61000-3-2와 16A/상 이상의 기기를 대상으로 하는 61000-3-4 등의 규격을 제정하여 고조파 전류를 엄격히 규제하고 있다.As a countermeasure, international organizations such as IEC have established standards such as 61000-3-2 for devices with 16A / phase and higher and 61000-3-4 for devices with 16A / phase and higher to strictly regulate harmonic currents. have.

상기와 같은 종래 전원공급장치의 문제점을 고려하여 최근에는 역률개선회로 가 탑재되어 역률을 개선시키고 있으나, 제품의 신뢰성이 떨어지는 문제점이 있다. In consideration of the problems of the conventional power supply as described above, the power factor improvement circuit is recently installed to improve the power factor, but there is a problem that the reliability of the product is lowered.

본 발명의 실시예에 따른 역률개선회로는 전원공급장치의 기동 시 또는 과전류 시 동작하여 손실로 인한 발열을 저감시킬 수 있다.The power factor improvement circuit according to the embodiment of the present invention may reduce heat generation due to loss by operating at the time of starting the power supply or during overcurrent.

본 발명의 실시예는 교류전원을 직류전원으로 정류시켜 부하 측에 제공하는 전원공급장치의 역률개선회로에 있어서, 정류부를 통해 입력되는 전류를 승압시키는 승압수단; 상기 정류부를 통해 입력되는 돌입전류를 제한하는 전류제한수단; 상기 승압수단으로부터 여기되는 전류값을 검출하는 전류검출수단; 상기 전류검출수단에서 검출되는 전류의 양에 따라 스위칭 동작하면서 전류를 상기 전류제한수단으로 흐르게 하거나, 우회시키는 스위칭수단1을 포함하여서 될 수 있다. An embodiment of the present invention provides a power factor improvement circuit of a power supply device for rectifying an AC power source into a DC power source and providing the same to a load side, comprising: boosting means for boosting a current input through the rectifying unit; Current limiting means for limiting inrush current inputted through the rectifier; Current detecting means for detecting a current value excited from the boosting means; And switching means 1 for flowing or bypassing the current to the current limiting means while switching operation in accordance with the amount of current detected by the current detecting means.

이하, 본 발명의 바람직한 실시 예에 대하여 첨부도면을 참조하여 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 일실시예에 따른 구성을 간략히 도시한 블럭도이고, 도 3은 본 발명의 일실시예에 따른 구성을 보다 구체적으로 도시한 회로도이다.2 is a block diagram schematically showing a configuration according to an embodiment of the present invention, Figure 3 is a circuit diagram showing a configuration in more detail according to an embodiment of the present invention.

본 발명의 실시예에 따른 교류전원을 직류전원으로 정류시켜 부하 측에 제공하는 전원공급장치의 역률개선회로(10)는 첨부 도면 도 1 및 도 2에 도시된 바와 같다. The power factor improvement circuit 10 of the power supply device rectifying the AC power according to the embodiment of the present invention to a DC power supply to the load side is as shown in FIGS. 1 and 2.

승압수단(11)은 정류부(1)를 통해 입력되는 전류를 승압시킨다. 전류제한수단(12)은 상기 정류부(1)를 통해 입력되는 돌입전류를 제한한다. 전류검출수단(13)은 상기 승압수단(11)으로부터 여기되는 전류값을 검출한다. 스위칭수단1(14)은 상기 전류검출수단(13)에서 검출되는 전류의 양에 따라 스위칭 동작하면서 전류를 상기 전류제한수단(12)으로 흐르게 하거나, 우회시킨다. The boosting means 11 boosts the current input through the rectifier 1. The current limiting means 12 limits the inrush current input through the rectifier 1. The current detecting means 13 detects a current value excited from the boosting means 11. The switching means 1 14 causes the current to flow to or bypass the current limiting means 12 while switching according to the amount of current detected by the current detecting means 13.

여기서, 승압수단(11)은 인덕터로 구현되며, 상기 정류부(1)의 출력 측에 연결된다.Here, the boosting means 11 is implemented as an inductor and is connected to the output side of the rectifier 1.

상기 전류제한수단(12) 역시 인덕터로 이루어질 수 있으며, 상기 승압수단과 직렬 연결된다.The current limiting means 12 may also be made of an inductor, and is connected in series with the boosting means.

상기 전류검출수단 역시 인덕터로 이루어질 수 있으며, 상기 승압수단과 병렬로 연결된다.The current detecting means may also be formed of an inductor, and connected in parallel with the boosting means.

상기 승압수단(11)과 전류제한수단(12) 및 전류검출수단(13)의 연결은 등가회로적으로 하나의 트랜스포머로 이루어질 수 있으며, 이는 본 발명의 다른실시예로 적용될 수 있으며, 이와 같은 실시예에서는 결과적으로, 상기 승압수단(11)과 전류제한수단(12)이 1차 측 권선(제1권선, 제2권선)이 되고, 전류검출수단(13)이 2차 측 권선이 된다.Connection of the boosting means 11, the current limiting means 12 and the current detecting means 13 may be made of a single transformer in an equivalent circuit, which may be applied to another embodiment of the present invention, such implementation In the example, as a result, the boosting means 11 and the current limiting means 12 become primary windings (first winding, second winding), and the current detecting means 13 becomes secondary winding.

상기 스위칭수단1(14)은 능동소자인 FET로 구현될 수 있으며, 상기 스위칭수단1(14)은 상기 전류제한수단(12)에 병렬 연결된다.The switching means 1 14 may be implemented with an FET which is an active element, and the switching means 1 14 are connected in parallel with the current limiting means 12.

그 밖에도, 본 발명의 실시예는 상기 전류제한수단(12)의 출력 측과 LOW레벨 단 사이에 전류제한수단(12)을 거쳐 출력되는 전원의 위상을 보정하는 한편, 전류 파형을 사인파에 가깝게 하여 역률을 보정하는 스위칭수단2(Q2)과, 상기 전류제한수단(12)의 출력 측에 PFC 다이오드(D) 및 상기 PFC 다이오드(D)를 거쳐 제공되는 전원을 충/방전시키면서 온전한 직류성분으로 변환시키는 커패시터(C)를 더 포함한다.In addition, the embodiment of the present invention corrects the phase of the power output through the current limiting means 12 between the output side of the current limiting means 12 and the LOW level stage, while bringing the current waveform closer to the sine wave. Switching means 2 (Q2) for correcting the power factor and converting into a direct DC component while charging / discharging power provided through the PFC diode (D) and the PFC diode (D) on the output side of the current limiting means (12). It further comprises a capacitor (C).

이와 같이 구성되는 본 발명의 실시예는 먼저, AC전원이 정류부(1 ; 예시적으로 브리지다이오드)로 입력되면 DC전원으로 전파 정류되고, 정류된 DC전원은 역률개선회로(10)로 입력된다.In the embodiment of the present invention configured as described above, first, when AC power is input to the rectifier 1 (eg, a bridge diode), it is full-wave rectified to DC power, and the rectified DC power is input to the power factor improving circuit 10.

역률 개선회로(10)에 입력된 DC전원은 전류량에 따라서 승압수단(11)과 전류제한수단(12) 또는 승압수단(11)과 스위칭수단1(14)을 거쳐 상기 PFC 다이오드(D) 및 커패시터(C)를 통해 SMPS회로에 공급되어 기기에 전원을 공급하게 된다.The DC power input to the power factor correction circuit 10 passes through the boosting means 11 and the current limiting means 12 or the boosting means 11 and the switching means 1 and 14 according to the amount of current. It is supplied to the SMPS circuit through (C) to supply power to the device.

즉, 정류부(1)에서 제공되는 전원이 승압수단(11)을 거치는 과정에서 전류검출수단(13)에 여기되어 전류의 양이 검출되며, 이와 같이 검출되는 전류의 양에 의해 스위칭수단1(14)의 스위칭 동작으로 제어함으로써, 승압수단(11)을 거친 전원을 전류제한수단(12)을 통해 상기 PFC 다이오드(D) 및 커패시터(C)로 제공하거나, 승압수단(11)을 거친 전원을 스위칭수단1(14)을 통해 상기 PFC 다이오드(D) 및 커패시터(C)로 제공할 수 있다.That is, the power supplied from the rectifier 1 is excited by the current detecting means 13 while passing through the boosting means 11 to detect the amount of current, and the switching means 1 (14) by the amount of the detected current. By controlling the switching operation, the power supply via the boosting means 11 is supplied to the PFC diode D and the capacitor C through the current limiting means 12, or the power supply via the boosting means 11 is switched. Means 1 (14) may be provided to the PFC diode (D) and the capacitor (C).

이때, 스위칭수단1(14)은 전류검출수단(13)으로부터 검출된 전류가 기준 전류를 넘어서면 전류를 차단하여, 승압수단(11)과 스위칭수단1(14)을 통해 흐르던 전류의 경로를 승압수단(11)과 전류제한수단(12)을 통해 흐르도록 하는 것으로, 전 원공급장치가 기동 시에는 꺼진 상태로 있다가, 전류가 기준 이하로 낮아진 후에 도통 상태로 들어가게 된다. At this time, the switching means 1 (14) cuts off the current when the current detected from the current detecting means 13 exceeds the reference current, thereby boosting the path of the current flowing through the boosting means 11 and the switching means 1 (14). By flowing through the means 11 and the current limiting means 12, the power supply is turned off at start-up and enters the conducting state after the current is lowered below the reference.

상기 스위칭수단1(14)이 꺼진 상태에서는 전류제한수단(12)과 승압수단(11)은 직렬 연결되어, 증가된 인덕턴스로 인해 돌입 전류 제한 기능을 수행한다. In the state in which the switching means 1 (14) is turned off, the current limiting means 12 and the boosting means 11 are connected in series to perform the inrush current limiting function due to the increased inductance.

즉, 전류제한수단(12)의 권선은 기동 시에만 전류가 흐르므로 권선의 선경이 가늘고, 스위칭수단1(14)의 차단 정격이 허용하는 범위에서 권선수를 결정할 수 있다. 참고로, 전류제한수단(12)이 승압수단(11)과 같은 권선수일 경우 인덕턴스는 4배가 되어, 돌입 전류의 상승률을 4분의 1로 낮출 수 있다. That is, since the winding of the current limiting means 12 flows only during startup, the wire diameter of the winding is thin, and the number of turns can be determined within a range allowed by the breaking rating of the switching means 1 (14). For reference, when the current limiting means 12 is the same number of windings as the boosting means 11, the inductance is quadrupled, thereby lowering the rate of increase of the inrush current to one quarter.

한편, 전류검출수단(13)에 여기된 전류량에 따라서 스위칭수단2(Q2)가 스위칭(구동에 필요한 전류 이상이면 ON상태, 그 이하면 OFF상태)되고, 이것에 의해서 상기 입력 AC전원은 그 위상이 보정되며 특히, 전류 파형은 사인파에 가깝도록 하여 그 입력 전원의 역률을 향상시켜서 상기 PFC 다이오드(D)와 커패시터(C)를 통해 SMPS회로에 DC전압을 전달해 주는 것이다.On the other hand, in accordance with the amount of current excited by the current detecting means 13, the switching means 2 (Q2) is switched (ON state if it is higher than the current required for driving, and then OFF state), whereby the input AC power source is in phase In particular, the current waveform is close to a sine wave, thereby improving the power factor of the input power supply, thereby delivering a DC voltage to the SMPS circuit through the PFC diode D and the capacitor C.

이와 같이 되는 본 발명은 스위칭수단2(Q2)에서의 스위칭 손실은 스위칭수단2(Q2)가 스위칭하는 순간 전류와 전압의 곱이 비례하는 손실과 상기 스위칭수단2(Q2)의 도통 상태 시, 저항에 의한 손실이 발생하게 되며, 특히 연속모드로 동작 시에는 승압수단(11)의 리키지(LEAKAGE)성분과 블로킹(BLOCKING)용의 상기 PFC 다이오드(D)의 역회복(REVERSE RECOVERY)전류에 의한 턴-온 시의 스위칭 손실이 크게 발생하게 되므로, 승압수단(11)에 의해 승압되면서 상기 PFC 다이오드(D)를 통해 SMPS회로로 출력되는 전원의 스위칭 손실을 감소시키도록 돌입전류의 흐름을 지연 시킨다.According to the present invention, the switching loss in switching means 2 (Q2) is a loss in which the product of the instantaneous current and voltage of the switching means 2 (Q2) is proportional to the resistance in the conduction state of the switching means 2 (Q2). Loss occurs, and especially when operating in the continuous mode, a turn by the leakage component of the boosting means 11 and the reverse recovery current of the PFC diode D for blocking. Since a large switching loss occurs at the time of turning on, the flow of the inrush current is delayed so as to reduce the switching loss of the power output to the SMPS circuit through the PFC diode D while being boosted by the boosting means 11.

이상, 본 발명을 본 발명의 원리를 예시하기 위한 바람직한 실시예와 관련하여 설명하고 도시하였지만, 본 발명은 그와 같이 도시되고 설명된 그대로의 구성 및 작용으로 한정되는 것이 아니다. While the invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described.

오히려, 첨부된 청구범위의 사상 및 범주를 일탈함이 없이 본 발명에 대한 다수의 변경 및 수정이 가능함을 당업자들은 잘 이해할 수 있을 것이다. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

따라서, 그러한 모든 적절한 변경 및 수정과 균등물들도 본 발명의 범위에 속하는 것으로 간주되어야 할 것이다. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

본 발명의 역률개선회로는 전원공급장치가 기동 시 및 이상 과전류 시 동작함으로써, 상시 동작형에 비해 손실과 회로 동작에 미치는 영향이 적게 된다. The power factor improvement circuit of the present invention operates at the time of startup and at abnormal overcurrent, so that the power factor improving circuit has less influence on loss and circuit operation than the normal operation type.

또한, 본 발명은 역률개선회로에 사용되고 있는 인덕터를 일부 변경하여 사용함으로써, 추가 회로에 의한 설계 변경이 필요하지 않다.In addition, the present invention does not require a design change by an additional circuit by using a part of the inductor used in the power factor improvement circuit.

Claims (10)

교류전원을 직류전원으로 정류시켜 부하 측에 제공하는 전원공급장치의 역률개선회로에 있어서, In the power factor improvement circuit of the power supply device which rectifies AC power to DC power and provides it to the load side, 정류부를 통해 입력되는 전류를 승압시키는 승압수단; Boosting means for boosting a current input through the rectifier; 상기 정류부를 통해 입력되는 돌입전류를 제한하는 전류제한수단; Current limiting means for limiting inrush current inputted through the rectifier; 상기 승압수단으로부터 여기되는 전류값을 검출하는 전류검출수단; Current detecting means for detecting a current value excited from the boosting means; 상기 전류검출수단에서 검출되는 전류의 양에 따라 스위칭 동작하면서 전류를 상기 전류제한수단으로 흐르게 하거나, 우회시키는 스위칭수단1을 포함하고,Switching means 1 for flowing or bypassing the current to the current limiting means while switching operation in accordance with the amount of current detected by the current detecting means, 상기 승압수단과 전류제한수단 및 전류검출수단은 The boosting means, the current limiting means and the current detecting means 하나의 트랜스포머로 이루어지되, 승압수단과 전류제한수단이 1차 측 권선이 되고, 전류검출수단이 2차 측 권선되는 것을 특징으로 하는 전원공급장치의 역률개선회로.A power factor improvement circuit of a power supply, comprising a transformer, wherein the boosting means and the current limiting means are the primary side windings, and the current detecting means is the secondary side windings. 제 1항에 있어서, The method of claim 1, 상기 승압수단과 전류제한수단 및 전류검출수단 각각은, 인덕터이고, The boosting means, the current limiting means and the current detecting means are each an inductor, 상기 승압수단과 전류제한수단은 직렬 연결되고, 상기 승압수단과 전류검출수단은 병렬 연결되는 것을 특징으로 하는 전원공급장치의 역률개선회로.The boosting means and the current limiting means are connected in series, and the boosting means and the current detecting means are connected in parallel. 삭제delete 제 1항에 있어서, 상기 스위칭수단1은 The method of claim 1, wherein the switching means 1 능동소자로 이루어지되, 상기 전류제한수단과 병렬로 연결되는 것을 특징으로 하는 전원공급장치의 역률개선회로.A power factor improving circuit of the power supply, comprising an active element, connected in parallel with the current limiting means. 제 4항에 있어서,The method of claim 4, wherein 상기 스위칭수단1은 FET(전계효과트랜지스터), 트랜지스터, 릴레이중 어느 하나 인 것을 특징으로 하는 전원공급장치의 역률개선회로.And the switching means 1 is any one of a field effect transistor (FET), a transistor, and a relay. 제 1항에 있어서,The method of claim 1, 상기 전류제한수단을 거쳐 출력되는 전원의 위상을 보정하고, 전류 파형을 사인파에 가깝게 하여 역률을 보정하는 스위칭수단2를 더 포함하는 것을 특징으로 하는 전원공급장치의 역률개선회로.And a switching means (2) for correcting the phase of the power output through the current limiting means and correcting the power factor by bringing the current waveform closer to the sine wave. 제 6항에 있어서,The method of claim 6, 상기 스위칭수단2는 상기 전류제한수단의 출력 측과 LOW레벨단 사이에 구비되는 것을 특징으로 하는 전원공급장치의 역률개선회로.And the switching means 2 is provided between the output side of the current limiting means and the LOW level terminal. 제 1항에 있어서,The method of claim 1, 상기 전류제한수단의 출력 측에 역서지전류가 유입되는 것을 차단하는 다이오드를 더 포함하는 것을 특징으로 하는 전원공급장치의 역률개선회로.And a diode which blocks the reverse surge current from flowing into the output side of the current limiting means. 제 8항에 있어서,The method of claim 8, 상기 다이오드는 PFC 다이오드인 것을 특징으로 하는 전원공급장치의 역률개선회로.The diode is a power factor improvement circuit of the power supply, characterized in that the PFC diode. 제 8항에 있어서,The method of claim 8, 상기 다이오드를 거쳐 제공되는 전원을 충/방전시키면서 온전한 직류성분으로 변환시키는 커패시터를 더 포함하는 것을 특징으로 하는 전원공급장치의 역률개선회로.The power factor improvement circuit of the power supply device, characterized in that it further comprises a capacitor for converting into a direct DC component while charging / discharging the power provided through the diode.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07147770A (en) * 1993-11-25 1995-06-06 Matsushita Electric Works Ltd Power unit
KR19980045583U (en) * 1996-12-27 1998-09-25 추호석 Inrush current prevention device of three phase AC power supply
JP2000060127A (en) 1998-08-11 2000-02-25 Fujitsu Denso Ltd Rush current suppression circuit
JP2005057947A (en) 2003-08-07 2005-03-03 Toshiba Lighting & Technology Corp Power supply device and discharge lamp lighting device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07147770A (en) * 1993-11-25 1995-06-06 Matsushita Electric Works Ltd Power unit
KR19980045583U (en) * 1996-12-27 1998-09-25 추호석 Inrush current prevention device of three phase AC power supply
JP2000060127A (en) 1998-08-11 2000-02-25 Fujitsu Denso Ltd Rush current suppression circuit
JP2005057947A (en) 2003-08-07 2005-03-03 Toshiba Lighting & Technology Corp Power supply device and discharge lamp lighting device

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