• 조명전기설비학회논문지
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• 제26권11호
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• pp.109-115
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• 2012

Recently, permanent magnet synchronous motor are applied to various applications. Because of the importance of high reliable operation in these areas, many research related to the fault detection and diagnosis of inverter system are conducted. So, a faults model for an inverter-driven permanent magnet synchronous motor is studied by using the fault current of motor according to switch open, which can be effectively used for performance evaluation of the diagnostic algorithm. And fault of the permanent magnet synchronous motor inverter drive system is divided into four types. The feasibility of the proposed method are improved by simulation and experiment.

• 전력전자학회논문지
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• 제1권1호
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• pp.27-37
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• 1996

This paper proposes the control algorithm for maximum efficiency drive of PWM inverter - induction motor system with high dynamic performance. If the induction motor is driven under light load with rated magnetizing current, the Iron loss is excessively large compared with the codder loss which results in doer motor efficiency. Maximum efficiency drive of an induction motor can be achieved by controlling the magnetizing current to satisfy the optimal ratio that leads the total motor loss to be a minimum value at a given speed. The proposed control algorithm essentially uses vector control technique and adopts voltage decoupling control strategy to prevent the degradation of dynamic performance due to reduced magnetizing current. To verify the proposed method, digital simulations and experiments are carried out for a squirrel-cage induction motor with the rating of 2.2[kW].

• Journal of international Conference on Electrical Machines and Systems
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• 제3권2호
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• pp.207-214
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• 2014

If two or more Permanent Magnet Synchronous Motors (PMSM) can be controlled by one inverter, a train can be driven by less energy than the present Induction Motor (IM) drive system. First, this paper proposes a method for simulating the movement of wheels and a vehicle to develop a control method. Next, a method is presented for controlling two or more PMSMs by one inverter.

• 전력전자학회논문지
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• 제4권2호
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• pp.122-127
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• 1999

본 논문에서는 3마력의 컴프레샤 모터를 갖는 대용량의 인버터 에어컨의 원가절감과 성능향상을 위해서 병렬구동방식을 사용한 역률제어회로를 제안하였다. 역률개선 LC필터를 제거하고 출력캐패시터와 인버터 스위치의 정격축소를 통해서 재료비를 줄이기 위해서 적절한 설계절차를 제시하였다. 이렇게 결정된 소자를 사용하여 6[kW] 소지전력을 갖는 프로토형 회로를 구성하고 제안된 회로의 동작을 확인하기 위해서 실험을 하였다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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• pp.232-235
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• 2001

This paper presents a circuit of the quasi-resonant DC link to achieve soft-switching three phase inverter using intelligent IGBT power module. The soft-switching operation in this circuit is confirmed simulation and experimental results. Its conductive noise is measured for electrical AC motor drive as compared with that of the conventional hard switching inverter.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1994년도 하계학술대회 논문집 A
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• pp.495-497
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• 1994

Given the constraint of the AC input power factor and the DC-link voltage and current ripple in voltage source inverter, minimizing the size and cost of the DC-link fitter components is very important. This paper presents a procedure for the selection of DC-link filler element values in a three-phase PWM voltage source inverter-fed induction motor drive system, which can not only satisfy the requirements for the system performance but also minimize the filter size.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1989년도 하계종합학술대회 논문집
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• pp.583-586
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• 1989

All Inverter fed induction motor systems which the switching patterns are determined by the approximated sinusoidal modulation techniques have many troublesome problems such as the current ripple duing to harmoic components. Therefore, in this paper, the current and torque pulsations for a inverter fed induction motor drive system are analyzed and specified theoretically and the determination techniques of optimal switching patterns for minimization of these factors are presented. Also, these simulation results are compared to the ones obtained from the realized experimental system by one-chip microcomputer, 8751.

• 대한전기학회논문지
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• 제37권12호
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• pp.862-871
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• 1988

본 논문에서는 전류제어형 PWM인버터-유도전동이 구동 시스템의 속응제어를 위한 벡터제어시스템을 제시하였다. 벡터제어 특성을 충분히 발휘하기 위해서는 고정자 전류의 숭시치 제어가 가능해야하므로 히스테리시스 제어기를 가진 전류제어형 PWM인버어터를 채택하였고 복잡한 벡터회전 및 연산은 마이크로프로세서를 사용한 소프트웨어로 처리하였다. 제시한 시스템을 디지탈시뮬레이션 및 실험을 통하여 그 특성의 우수함을 입증하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 A
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• pp.241-243
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• 2003

By development of power electronics technology, the increasing of inverter's switching frequency lead to the development of speed control technology of induction motor. But the surge voltage including harmonic component in output waveform can cause the motor to generate power losses, torque ripple, acoustic noise and oscillation. This paper is analyzed the characteristics for switching surge of adjustable speed drive and is presented the problem by inverter.

• 조명전기설비학회논문지
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• 제15권3호
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• pp.18-24
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• 2001

본 연구에서는 단상 PWM 컨버터와 3상 PWM 전압형 인버터 유도전동기 운전으로 나누 어져 있다. 단상 시스템의 교류 전원의 주파수에는 순시전력의 맥동성분을 가진다. 컨버터의 직류 맥동전압은 맥동성분을 발생시킨다. 결과적으로 인버터의 출력전압과 전류의 파형은 왜곡된다 시스템의 정상상태는 상태공간법으로 해석된다. 이러한 모든 사항은 시뮬레이션과 실험을 통하여 그 타당성을 확인하였다.