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An improved PID sliding mode control strategy with constant switching frequency for the voltage regulator of doubly salient electro-magnetic generator has been proposed in this paper. Next, operating principle of controller was described in detail and the stable condition of the system was deduced by Lyapunov function based on mathematical model and working principle of generator. Considering improved...
A novel direct torque control based on terminal sliding mode controller for doubly salient electro-magnetic machine was proposed in this paper. The mathematical model of the motor has been constructed and generation principle of torque ripple was analyzed. Based on analysis of torque ripple, phase current waveforms had been optimized to reduce the electro-magnetic torque ripple by using direct torque...
Doubly salient electro-magnetic machine using traditional control method has large torque ripple for dead-time during commutation process and its special structure. During commutation, electro-magnetic torque and power will decrease quickly due to all switches are off states. In order to avoid the problem, a novel phase-shifted and interleaved angel control strategy was proposed in this paper. The...
A nonsingular terminal sliding mode control strategy with constant switching frequency for the voltage regulator of doubly salient electro-magnetic generator has been proposed in this paper. Next, operating principle for the terminal sliding mode controller was described in detail and the stable condition of the system was deduced by Lyapunov function based on mathematical model and working principle...
In this paper, PTFE composite, epoxy composite, phenolic composites, hard aluminum, cemented carbide as friction materials are respectively paired to ultrasonic motors, with the stator composed by phosphor bronze and piezoelectric ceramic. Mechanical properties and transient characteristics of ultrasonic motors are tested. The results show a monotonic increase in rotation speed, and a monotonic decrease...
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