Asynchronous motor pure electronic speed feedback method
An asynchronous motor, speed feedback technology, applied in the control of generators, motor-generator control, electronic commutation motor control and other directions, can solve the problem that the dynamic performance of the transmission system cannot be guaranteed, the vector control cannot be guaranteed, the large amount of calculation is not conducive to online implementation, etc. question
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[0082] figure 1 It is a block diagram of an existing conventional system realizing a direct vector control device without a speed sensor of an asynchronous motor, wherein the entire vector control algorithm 120 including the EKF rotational speed estimation algorithm 90 is all implemented using DSP programming, that is, the entire vector control algorithm 120 in the figure needs Occupies the storage space resources and runtime resources of the DSP. This conventional asynchronous motor direct vector control device using EKF for speed estimation and speed feedback includes closed-loop control of speed, torque current and rotor flux excitation current. The speed PI regulator 30 according to the speed instruction and speed feedback value The deviation between provides the torque reference value, in the case of constant rotor flux, the torque is proportional to the stator current torque component, therefore, the output of the speed regulator 30 is based on the torque current ref...
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