Method for judging locked-rotor state of position-sensorless vector control permanent magnet synchronous motor
A permanent magnet synchronous motor and vector control technology, which is applied in the direction of controlling generators, vector control systems, and electromechanical brakes, etc., can solve problems such as narrow application range, low accuracy and troublesome judgment of locked rotor status, and achieve motor protection , Improve the effect of protection strategies
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[0036] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.
[0037] like figure 1 As shown, the basic working principle of the position sensorless vector control permanent magnet synchronous motor is briefly described (the textbook has a detailed description). The permanent magnet synchronous motor is regarded as the result of the interaction between the rotating magnetic field of the stator and the rotating magnetic field of the rotor. There are two There are two coordinate systems, one is the dq axis of the rotor rotating coordinate system; the other is the ABC coordinate system of the stator stationary coordinate system (which can be converted into a coordinate system perpendicular to each other in αβ); the rotor can be regarded as the role of the excitation current if rotating at the speed wr, the stator It can be regarded as the effect of the excitation current is to rotate at the ...
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