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In grid-side converter control in direct drive wind power generation system, grid voltage oriented vector control strategy is used. The fast and precise detection of the amplitude and phase of the fundamental frequency voltage components is a crucial issue in the design of grid synchronization of grid-side converter. Because the dynamic performance of the phase-locked loop based on the single synchronous...
Indirect-drive electric vehicle system will improve the overall reliability and efficiency due to elimination of reduction gear and the differential gear. The paper discusses the design of direct-drive axial flux permanent magnet in-wheel machine for electric vehicle in order to achieve a wide speed range operation and low cogging torque. Fractional-slot winding and wedges made from soft magnetic...
The paper investigated the design of a new-type direct-drive axial flux permanent magnet (AFPM) synchronous in-wheel machine specially designed for electric vehicle applications. The machine configuration is simple and easy to manufacture. The machine has good performances such as phase EMF waveform close to sinusoidal waveform and low cogging torque. The electromagnetic design of 6.8 kW AFPM machine...
This paper describes the optimal control of variable-speed permanent magnet synchronous generators system. In order to maximize generated power, permanent synchronous generator is controlled by a maximum power point tracking (MPPT) control and maximum efficiency control. A sensor-less scheme is proposed for MPPT. Experimental results have been carried out to verify the benefits of the proposed system.
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