Detection method for initial position of rotor in static state of permanent magnet synchronous motor (PMSM)
A permanent magnet synchronous motor and initial position detection technology, which is applied in the control of generators, motor control, electronic commutators, etc., can solve the problems of long algorithm detection time, complex algorithm reliability, etc., and achieves easy implementation and wide application range , to achieve the effect of simple algorithm
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[0026] Embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings.
[0027] A method for detecting the initial position of a permanent magnet synchronous motor rotor in a stationary state according to an embodiment of the present invention includes the following steps:
[0028] right figure 2 In the hardware structure of the permanent magnet synchronous motor control system, the power tube applies the control signal.
[0029] Step 1: Adjust the voltage vector injection time to make the injected current large enough to improve the discrimination of magnetic flux saturation. Inject V1 (100) and V4 (011) multiple times into the static permanent magnet synchronous motor respectively, and adjust the voltage vector pulse application time until the A-phase response current is a certain multiple of the rated current. Phase A current waveform as Figure 5 , where 1, 2, 3, and 4 are the current injected into phase A when l...
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