AN APPROACH TO POSITION SENSORLESS DRIVE FOR BRUSHLESS DC MOTORS

被引:288
作者
OGASAWARA, S
AKAGI, H
机构
[1] Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata
关键词
D O I
10.1109/28.90349
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper describes a brushless dc motor without a position sensor. Variable speed is achieved by adjusting the average motor voltage, just like chopper control of dc motors. The position sensorless drive proposed in this paper is based on detection of the conducting interval of free-wheeling diodes connected in antiparallel with power transistors. This approach makes it possible to detect the rotor position over a wide speed range, especially at a lower speed. Experimental results obtained from a prototype brushless dc motor of 300 W rating are shown to confirm the validity of sensorless drive from 45 to 2300 r/min. A starting procedure of the motor is also discussed because it is impossible to detect the rotor position at a standstill.
引用
收藏
页码:928 / 933
页数:6
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