Field-weakening control method for permanent magnet synchronous motor
A permanent magnet synchronous motor and field-weakening control technology, which is applied in motor control, motor generator control, AC motor control, etc., can solve the problems of easy instability of motor vibration, reduce motor vibration, and reduce current ripple. wave, increasing the stability effect
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[0014] The present invention will be further explained below in conjunction with the drawings.
[0015] figure 2 It shows a control principle block diagram of a permanent magnet synchronous motor field weakening control method according to an embodiment of the present invention. Please refer to figure 2 , The field weakening control method of a permanent magnet synchronous motor according to an embodiment of the present invention and figure 1 Compared with the existing permanent magnet synchronous motor field weakening control method shown, the main difference is that i q High frequency compensation, namely figure 2 The part shown in the dashed box.
[0016] Specifically, a permanent magnet synchronous motor field weakening control method according to an embodiment of the present invention includes the following steps:
[0017] Step a. Obtain the d-axis output voltage U through the field weakening control without current loop d0 〞And q-axis output voltage U q0 ";
[0018] Step b, o...
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