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향상된 전차원 자속 관측기를 이용한 매입형 영구자석 동기 전동기의 넓은 영역 센서리스 속도제어 알고리즘 기법
강성윤(Seong Yun Kang),윤재승(Jae Seung Yoon),신혜웅(Hye Ung Shin),이교범(Kyo-Beum Lee) 대한전기학회 2017 전기학회논문지 Vol.66 No.2
This paper proposes a sensorless control method to improve the performance of an internal permanent magnet synchronous motor (IPMSM) control by using a full-order flux observer in a wide speed range. The conventional sensorless control method uses a constant gain for high performance at low-speed region. However, this method has drawbacks such as an increased angle error and current ripple in the high-speed region due to the fixed gain value. In order to overcome this problem, the gain of the full-order flux observer is changed by considering the angle error in the whole speed range. The proposed method minimizes the angle error for each region of the speed range by applying a relevant gain value, which improves the current ripple reduction and motor noise cancellation. The validity of proposed sensorless control method is verified by a simulation and an experiment.
5상 유도전동기 구동 시스템을 위한 인버터의 개방고장진단 방법
백승구(Seung-Koo Baek),신혜웅(Hye-Ung Shin),강성윤(Seong-Yun Kang),박춘수(Choon-Soo Park),이교범(Kyo-Beum Lee) 대한전기학회 2016 전기학회논문지 Vol.65 No.2
This paper proposes a fault diagnosis method for an open-fault in inverter driving five-phase induction motor. The five-phase induction motor has a high output torque and small torque ripple in comparison to three-phase. The best advantage of the five-phase induction motor is fault diagnosis and tolerant control using redundancy of phases. This paper uses an inverter as a power converter for driving a five-phase induction motor. If a switch of inverter occurs to the open-fault, this problem is the influence on the output current and output torque. To solve this problem, there is need of an accurate diagnosis and fault switch distinction. Therefore, this paper propose a fault detection method of the open-fault switches for the fault diagnosis. First, analyzing the pattern for the open-circuit fault of one phase. next, analyzing the pattern for the open-circuit fault of each inverter switches. Through the pattern analysis, It defines the scope of each of the failure switch. Thereafter, By using an algorithm that proposes to perform a fault diagnosis method. The proposed algorithm is verified from the experiment with the 1.5 kW five-phase induction motor.