发明名称 |
VOLTAGE DIVIDING POWER FACTOR IMPROVEMENT CIRCUIT, VOLTAGE DIVIDING POWER FACTOR IMPROVEMENT DEVICE, AND VOLTAGE DIVIDING POWER FACTOR IMPROVEMENT METHOD |
摘要 |
<P>PROBLEM TO BE SOLVED: To reduce a mounting area of a PSU (Power Supply Unit) or a power loss of the PSU. <P>SOLUTION: A voltage dividing type bridgeless PFC (Power Factor Correction) circuit 1 has a first power factor improvement circuit 2 that improves a power factor of a power by according a phase difference between a current generated by an applied positive voltage and the applied voltage in the case that a positive AC voltage is applied from exterior. The voltage dividing type bridgeless PFC circuit 1 has a second power factor improvement circuit 3 arranged in parallel to the first power factor improvement circuit 2, and that improves a power factor of a power by according a phase difference between a current generated by an applied negative voltage and the applied voltage in the case that a negative AC voltage is applied from exterior. The voltage dividing type bridgeless PFC circuit 1 has an output circuit configured by arranging a capacitor C1 that stores a power whose power factor is improved by the first power factor improvement circuit 2 and a capacitor C2 that stores a power whose power factor is improved by the second power factor improvement circuit 3 in series. <P>COPYRIGHT: (C)2012,JPO&INPIT |
申请公布号 |
JP2012019637(A) |
申请公布日期 |
2012.01.26 |
申请号 |
JP20100156111 |
申请日期 |
2010.07.08 |
申请人 |
FUJITSU LTD |
发明人 |
YONEZAWA YU;NAKAJIMA YOSHIYASU |
分类号 |
H02M7/12 |
主分类号 |
H02M7/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|