In order to improve the performance of permanent magnet synchronous motor direct torque control such as high speed machining center and precision grinder,from the principle of zero voltage vector function,it analyzes the role of zero voltage vector in the Permanent magnet synchronous motor control system and the impact on Torque hysteresis comparator structure of rotating torque fluctuations deeply. Compared w ith the traditional torque hysteresis comparator,the hysteresis w idth optimized torque hysteresis...
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