| US 7,580,272 B2 | ||
| Power source apparatus | ||
| Yasutaka Taguchi, Kanagawa (Japan); Satoshi Ichiki, Kanagawa (Japan); and Hiroyuki Kinpara, Kanagawa (Japan) | ||
| Assigned to Fujitsu General Limited, Kanagawa (Japan) | ||
| Filed on Nov. 03, 2006, as Appl. No. 11/592,225. | ||
| Claims priority of application No. 2005-320968 (JP), filed on Nov. 04, 2005. | ||
| Prior Publication US 2007/0103947 A1, May 10, 2007 | ||
| Int. Cl. H02M 5/42 (2006.01); G05F 1/10 (2006.01) | ||
| U.S. Cl. 363—89 [323/222] | 8 Claims |
| 1. A power source apparatus that converts AC power to DC voltage, the power source comprising:
a power factor-improving unit that includes a reactor and a switching element and outputs an output voltage as a load voltage
to a load;
a current-instruction-amplitude-value preparation unit that generates a current instruction amplitude value based on a deviation
between a target output voltage instruction value and the output voltage;
a current-instruction-value preparation unit that generates, as a current instruction value, a modeling waveform obtained
by reducing a harmonic component of a predetermined order from a current waveform; and
a switching control unit that ON/OFF-controls the switching element in an interval of the former half of a half cycle of the
AC power based on a comparison result obtained by comparing an input current and the current instruction value, wherein
the current-instruction-value preparation unit includes an integration unit that integrates a DC current value depending on
the current instruction amplitude value to prepare the current instruction value according to which the former half of the
half cycle of the AC power is a straight line part.
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