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Advanced angle commutation is an effective approach to suppress the commutation torque ripple for doubly salient electromagnetic machine (DSEM). In this paper, the commutation process under “three-phase three-state” conduction mode is analyzed in detail at first. On this base, a novel self-optimizing control strategy of advanced commutation angle for DSEM is proposed, it starts with setting an initial...
Excitation fault is troublesome because it takes a negative impact on the overall performance of the doubly salient electromagnetic machine (DSEM). To deal with the excitation fault, this paper studies the machine design and fault-tolerant control strategies for DSEM driving system with three-phase full-bridge converter. With the view of the unique electromagnetic structure of DSEM, this paper analyzes...
Based on the finding that the inductance of doubly salient electromagnetic motor varies according to its rotor position, a new method to determine the initial rotor position is introduced in this paper. With no extra test pulses needed, this method detects the sector where the rotor is at by comparing the three-phase induced voltages during the excitation field building, significantly cutting down...
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