| US 7,495,937 B2 | ||
| PWM cycloconverter | ||
| Hidenori Hara, Fukuoka (Japan); Junkoo Kang, Fukuoka (Japan); Eiji Yamamoto, Fukuoka (Japan); and Kenji Yamada, Fukuoka (Japan) | ||
| Assigned to Kabushiki Kaisha Yaskawa Denki, Tokyo (Japan) | ||
| Appl. No. 10/572,673 PCT Filed Sep. 13, 2004, PCT No. PCT/JP2004/013301 § 371(c)(1), (2), (4) Date Mar. 20, 2006, PCT Pub. No. WO2005/029690, PCT Pub. Date Mar. 31, 2005. |
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| Claims priority of application No. 2003-327242 (JP), filed on Sep. 19, 2003. | ||
| Prior Publication US 2007/0081369 A1, Apr. 12, 2007 | ||
| Int. Cl. H02M 5/45 (2006.01) | ||
| U.S. Cl. 363—37 [307/424; 363/159] | 3 Claims |
| 1. A PWM cycloconverter including an AC power source in which phases are connected directly to phases of the output side thereof
by means of a bi-directional switch having self-arc-extinguishing capability, wherein an AC power source voltage is PWM-controlled
in response to an output voltage command to output variable voltage having variable frequency,
the PWM cycloconverter comprising:
an input current detecting means for detecting one or more input current of the PWM cycloconverter; and
a PWM converter connected to a DC voltage means, wherein
an output unit of the PWM converter is connected to a place before an input filter of the PWM cycloconverter to keep down
resonance of the input filter on the basis of an input current signal detected by means of the input current detecting means.
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