Luoqiang Cai

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With rapid development of the power semiconductor devices, direct-drive permanent magnet synchronous generator (PMSG) has shown the significant advantages for its high efficiency, reliability, and becomes an attractive choice for variable-speed wind power generation. MW class PMSG system with larger capacity, higher power density is an important trend. This(More)
Since variable-speed generation has a higher energy capturing and converting efficiency than the fixed-speed system, new proposals for wind power system utilize variable-speed generators are introduced, among which permanent-magnet synchronous generator(PMSG) is an attractive choice. This paper describes a sensorless vector control strategy for a(More)
Nowadays, there has been much interest and studies in direct-drive permanent magnet synchronous generator (PMSG) due to its high efficiency and reliability with the rapid development of the power semiconductor devices. MW class permanent magnet synchronous generator (PMSG) is an important trend for larger capacity and higher power density. The present paper(More)
This paper analyzes the implementation of the sensorless control strategy for a doubly-fed induction generator (DFIG) for wind energy. The proposed algorithm can directly obtain the information of rotor position and speed via simple arithmetic operation by measuring the stator voltage, the rotor and stator currents. A DFIG sensorless digital control system(More)
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