Control method of built-in permanent-magnet synchronous motor
A technology of permanent magnet synchronous motor and control method, which is applied in motor control, motor generator control, AC motor control, etc., and can solve the problems that motor efficiency and load capacity cannot be optimized, so as to reduce motor loss and improve operating efficiency Effect
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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0026] With reference to the drawings, the control method of a built-in permanent magnet synchronous motor of the present invention includes the following steps:
[0027] Step 1. Use the field weakening control method to construct the rotor closed-loop system, obtain the d-axis voltage response, and obtain the corresponding q-axis voltage V fwc And judge whether the current and voltage at the stable operating point meet the limit circle constraint, if not, select the appropriate V fwc ;
[0028] Construct a closed-loop field weakening control rotor system, estimate the rotor synchronous rotating coordinate d-axis current through coordinate transformation, and obtain the reference d-axis current through the field weakening regulator, which includes the field weakening component and the torque component; under a fixed q-axis voltage, The d-axis current is automaticall...
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