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METHOD AND DEVICE FOR DETECTING INITIAL POSITION OF ROTOR OF PERMANENT MAGNET SYNCHRONOUS MOTOR IN NO-LOAD ENVIRONMENT
METHOD AND DEVICE FOR DETECTING INITIAL POSITION OF ROTOR OF PERMANENT MAGNET SYNCHRONOUS MOTOR IN NO-LOAD ENVIRONMENT
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机译：用于检测无负载环境中永磁同步电动机转子初始位置的方法和装置
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摘要
The present invention relates to a method and device for detecting an initial position of a rotor of a permanent magnet synchronous motor in a no-load environment. A method according to an embodiment of the present invention can comprise the steps of: estimating a temporary initial position α' by means of aligning a d axis after I/F driving; measuring a first voltage command which is output by performing velocity control within a predetermined velocity range with respect to the forward direction of a motor on the basis of the temporary initial position α'; measuring a second voltage command which is output by performing velocity control within the predetermined velocity range with respect to the reverse direction of the motor on the basis of the temporary initial position α'; calculating respective variations of the first voltage command and second voltage command in accordance with the velocity control, and calculating a compensation angle α'' with respect to the temporary initial position α' on the basis of the variations; and calculating an initial position α of the rotor on the basis of the sum of the temporary initial position α' and compensation angle α''.
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