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金現哲(Hyun-Cheol Kim),金長睦(Jang-Mok Kim),金喆遇(Cheul-U Kim) 대한전기학회 2007 전기학회논문지 Vol.56 No.9
This report describes the analytical characteristic of sinewave air gap flux density for the brushless AC motor with surface permanent magnet. The analysis of sinewave air gap flux density is the key to expect the performance of back EMF for the design of brushless AC motor. The numerical analysis and FEM analysis are performed to adopt radial and parallel flux magnetization of magnet on the rotor. And it is also executed to vary the magnet arc angle and arc radius for the condition of constant and non constant air gap. This report is focused on the characteristic of sinewave air gap flux density for permanent magnet of surface brushless AC motor. This results also have more reliable data against the previous paper which had the representative numerical analysis of air gap flux densitv[1][2].
7상 BLDC 전동기의 고속 운전시 개선된 진상각 보상 연구
金現哲(Hyun-Cheol Kim),吳亨植(Hyung-Sik Oh),金長睦(Jang-Mok Kim),金喆遇(Cheul-U Kim) 대한전기학회 2007 전기학회논문지 Vol.56 No.11
According to previously published paper the phase advance angle is adopted to the BLDC motor drive with high speed. The report proposed describes the optimum algorism that phase current is in phase with the initial flat region of back EMF. This report studies the need of more leading phase advance angle compared with in phase concept between phase current and back EMF. In case of high reactance this report proposes the more phase advance angle than in phase. The test results more rms value of phase current and output power due to more phase advance angle than in phase. It will be helped the high power operation of BLDC motor at high speed.
金現哲(Hyun-Cheol Kim),吳亨植(Hyung-Sik Oh),金長睦(Jang-Mok Kim),金喆遇(Cheul-U Kim) 대한전기학회 2007 전기학회논문지 Vol.56 No.12
The simulation model has been already developed not for 7 phase but for 3 phase BLDC motor. It is necessary to develop a new simulation model of multi-phase BLDC motor including the phase delay angle especially in the high speed region. In this paper, the suitability of the proposed model is verified through the several computer simulations, and experimented results.