• 전자공학회논문지B
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• 제33B권5호
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• pp.152-158
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• 1996

A novel resonant pulse control technique which generates high-quality sinusoidal output voltage from a resonant dc link inverter is presented for UPS applicatons. The proposed control technique limits resonant voltae overshoot without any passive or active clamp circuit, resulting in resonant pulses iwth uniform amplitude and high efficiency. The output voltage is controlled by the third order contorller iwth an inner loop of th efilter inductor current and the feedforward controller. Analysis and design of the proposed control technique are illustrated and verified on a 5kVA experimental unit.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 추계학술대회 논문집 학회본부
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• pp.32-35
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• 1988

Simultaneous control of active and reactive power for superconducting magnetic energy storage is possible by a current source inverter with paise - width modulation. And a current source inverter is useful to reduce low order harmonics. In this paper, paise generating method for pulse - width modulation is studied and harmonics with and without paise - width modulation is compared.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.809-815
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• 2007

This paper proposes the analysis on new equipment for power quality in electrified railway. The proposed equipment consists of series and parallel inverter. Each inverter is connected by capacitor as dc link. This structure can be compensated for active and reactive power in catenary through transformer.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.921-927
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• 2006

This paper proposes the analysis on new equipment for power quality in electrified railway. The proposed equipment consists of series and parallel inverter. Each inverter is connected by capacitor as dc link. This structure can be compensated for active and reactive power in catenary through transformer.

• 조명전기설비학회논문지
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• 제27권1호
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• pp.53-60
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• 2013

In this paper, a control algorithm for active power filter (APF), which compensates for the harmonics and power factor, boosting the DC-link voltage is proposed. The proposed scheme employs a pulse-width-modulation (PWM) voltage-source inverter. A simple algorithm to detect the load current harmonics is also proposed. The APF and charging circuit are implemented in one inverter system. Finally, the validity of the proposed scheme is investigated with simulated and experimental results for a prototype APF system rated at 3kVA.

• 전력전자학회논문지
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• 제4권2호
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• pp.144-151
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• 1999

본 논문에서는 IEC 61000-3-2와 같은 고조파 전류 국제규제에 만족하기 위해서 인버터 에어컨을 위한 고역률 단상능동정류가(SAR) [4-6]를 적용하였다. 입력전류의 왜곡을 최소화하고 FA5331, UC3854, ML4821 등과 같은 제어IC를 적용하기 위해서 입력전압 및 전류에 대한 새롭고 적절한 검출회로를 제안하였다. 효율 및 가격의 관점에서 SAR를 인버터 에어컨에 적용하기 위한 두가지 방법이 있다. 이런 두가지 방식에 대해서 수동소자의 선정방법을 제시하였다. 결정된 소자들을 사용하여 SAR 효율의 증가 여부를 확인하기 위해서 손실분석을 행하였다. 3kW급의 이러한 두가지 방식에 대한 프로트형 SAR회로를 제작하고 실험결과를 통해서 역률제어능력을 갖는 회로의 동작과 성능을 확인하였다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2006년도 전력전자학술대회 논문집
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• pp.213-215
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• 2006

Islanding phenomenon is undesirable because it lead to a safety hazard to utility service personnel and may cause damage to power generation and power supply facilities as a result of unsynchronized reclosure. In order to prevent the phenomenon, various anti-islanding methods have been studied. This paper proposes the variation method of inverter output current magnitude to prevent the islanding phenomenon as a novel method, which causes the large frequency variation of inverter output voltage after islanding. Unlike most active anti-islanding method deteriorating power quality, this novel method will have high performance of islanding detection and good power quality. For the verification of the proposed method, the simulated result and analyses are presented.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1998년도 전력전자학술대회 논문집
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• pp.31-34
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• 1998

In this paper, a Single-phase Active Rectifier(SAR) with high power factor capability for inverter air-conditioner is adopted for satisfying the international standards of input current harmonics, IEC 1000-3-2. Comparing the conventional boost power factor correction circuit, one diode drop is reduced in the power flow path of the SAR circuit, so the system efficiency is improved. To apply the control IC, such as UC3854, ML4821 and so forth, to the SAR, the adequate sensing circuits are proposed. The design rules of passive components and two control loops are also presented. The prototype SAR circuit with 3㎾ power consumption is builted and tested to verify the operation of the proposed circuit.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
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• pp.677-682
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• 1998

A Single-phase Active Rectifier (SAR) [4-6] with high power factor capability is adopted to satisfy the international harmonic current standards such as IEC 1000-3-2. To minimize the input current distortion and to apply the control IC, such as FA5331, UC3854, ML4821 and so forth, the new adequate sensing circuits of the input voltage and current are proposed. There are tow methods applicable the SAR to inverter air-conditioner from the viewpoint of both efficiency and cost. The selecting methods of the passive components are presented for the two approaches. Using the determined components, the loss analyses are carried out. The prototype SAR circuits of these two approaches with 3kW power consumption are built and the operation and performance of the circuits with power factor correction capability are verified through the experimental results.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.258-261
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• 2001

High Power factor Active Filter converter is used for Inverter Air conditioner power supply to meet IEC standard. In the active filter topology for power factor, extra switch just control the input current indirectly to meet the IEC standard for reducing the cost and size. In this paper, low cost converter was suggested by simulation using extra switch which auxiliary pulse is inserted and quasi resonant soft switching topology control is adapted for panel's inverter air conditioner converter Inserting auxiliary Pulse method to the extra switch has the benefit of reducing THD by low cost input control circuit. And also quasi resonant soft switching topology can reduce switching loss. So both technical is suitable for Panel's Air conditioner.