Resolver adaptive fault-tolerant control system and method for pmsm drive system
A resolver, fault-tolerant control technology, applied in the control system, vector control system, motor control, etc., can solve the inability to realize resolver on-line diagnosis, resolver unbalanced sine and cosine output amplitudes, and imperfect integration of quadrature, etc. question
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[0056] In this embodiment, the pulsating magnetic field generated by the stator excitation winding of the resolver will induce a sine and cosine voltage signal containing the absolute position information of the motor shaft in its rotor sine and cosine winding, and then demodulate the PMSM through a dedicated demodulation chip rotor position. However, due to nonlinear effects such as resolver processing and installation errors, temperature drift of excitation and output conditioning circuit components, etc., the sine and cosine outputs of the resolver have amplitude imbalance and quadrature imperfection faults, resulting in the PMSM obtained based on the resolver. Deviations in rotor position cause continuous oscillations in motor torque and speed.
[0057] Therefore, in view of the above problems, a resolver adaptive fault-tolerant control system of PMSM drive system is proposed, which is applied to the PMSM drive system in which the position of the PMSM rotor is obtained by ...
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