- 著者
- 長谷川 一徳 Natchpong Hatti 赤木 泰文
- 出版者
- 一般社団法人 電気学会
- 雑誌
- 電気学会論文誌D(産業応用部門誌) (ISSN:09136339)
- 巻号頁・発行日
- vol.129, no.4, pp.438-445, 2009-04-01 (Released:2009-04-01)
- 参考文献数
- 20
- 被引用文献数
- 2 3
This paper describes a 6.6-kV adjustable-speed motor drive for use in fans, blowers, and pumps without a transformer. The power-conversion system consists of a diode rectifier, a five-level diode-clamped PWM inverter, and a voltage-balancing circuit. A 200-V 5.5-kW downscale model is developed, constructed, and tested. The five-level PWM inverter and the voltage-balancing circuit are studied in detail. Experimental results obtained from testing the 200-V downscale model confirm the viability and effectiveness of the 6.6-kV adjustable-speed motor drive, indicating that the dc mean voltages of the four split dc capacitors are well balanced under all the given operating conditions.