Sensorless compound control method for permanent magnet synchronous motor
A technology of permanent magnet synchronous motor and compound control, which is applied in motor control, motor generator control, electronic commutation motor control, etc., to achieve strong anti-interference and wide adaptability
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[0038] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0039] This embodiment is implemented through the following technical solutions. A sensorless composite control method for a permanent magnet synchronous motor is used to control a permanent magnet synchronous motor and includes the following steps:
[0040] The sensorless control of the permanent magnet synchronous motor adopts a composite control method. The control process is divided into three stages according to the output speed value calculated by the composite control: the first stage is zero, the low speed stage, and the upper limit of the speed is n min , This stage uses the rotating high frequency voltage injection method to detect the speed and rotor position; the second stage is the transition stage, the upper and lower limits of the speed are n max , N min , This stage adopts the compound control method to detect the speed and rotor position...
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