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所属单位：自动化学院

发表刊物：IET ELECTRIC POWER APPLICATIONS

关键字：electromagnetic devices rotors motor drives machine testing estimation theory transistors commutation torque motors position sensorless startup doubly salient electromagnetic motor DSEM sensorless drive system two phase self-inductance rotor position estimation error method one test pulse-injection-based method three-phase winding transistor parallel-connected phase sample commutation

摘要：The self-inductance of doubly salient electro-magnetic motor (DSEM) varies with rotor position, so it's becoming an effective approach to estimate rotor position in DSEM sensorless drive system. Based on the feature that there must be a change in the magnitude relation of two phase self-inductances when the rotor goes from one sector to the other, this study proposes a novel rotor position estimation method for DSEM sensorless startup, it needs only one test pulse injection. The proposed method starts with injecting a test voltage pulse in all three-phase windings by turning on three proper transistors a certain time synchronously. Then at the end of the test pulse, the response currents of the two parallel-connected phases are sampled and compared for judging whether the rotor has reached the commutation instant. Moreover, the rotor position estimation error and output torque of the pulse-injection-based methods are theoretically analysed. Compared with the conventional rotor position estimating method which requires multiple test pulses, the proposed strategy has merits of less test time consuming, higher-accurate commutation, greater output torque and superior startup performance. Finally, the experiments on a 12/8-pole DSEM confirm the correctness and flexibility of the proposed method.

ISSN号：1751-8660

是否译文：否

发表时间：2017-09-01

合写作者：周兴伟,杨岚,史立伟

通讯作者：周波