发明名称 |
Power supply circuit, power supply method and power supply system |
摘要 |
A power supply circuit supplies power to a load from a main power source or an auxiliary power source. The power supply circuit includes a hybrid selection unit that selects one of the main power source and the auxiliary power source and supplies power to the load from the selected one, a voltage comparing unit that compares a voltage of the main power source and a voltage of the auxiliary power source, and a power source control unit that controls the auxiliary power source in accordance with a comparison result of the voltage comparing unit, and supplies a voltage higher than the voltage of the main power source by a predetermined voltage to the load from the auxiliary power source through the hybrid selection unit. |
申请公布号 |
US9490636(B2) |
申请公布日期 |
2016.11.08 |
申请号 |
US201013992673 |
申请日期 |
2010.12.08 |
申请人 |
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. |
发明人 |
Haraguchi Hirotsugu |
分类号 |
H02J4/00;H02J7/35;H02J7/00 |
主分类号 |
H02J4/00 |
代理机构 |
Dickinson Wright PLLC |
代理人 |
Dickinson Wright PLLC |
主权项 |
1. A power supply circuit which supplies power to a load from a main power source or an auxiliary power source, the power supply circuit comprising:
an energy storage unit that stores power that is supplied from the auxiliary power source; a hybrid selection unit that elects one of the main power source and the auxiliary power source and supplies power to the load from the selected one; a first voltage comparing unit that compares a voltage of the main power source and a voltage of the auxiliary power source; a power source control unit that controls the auxiliary power source in accordance with a comparison result of the voltage comparing unit, and supplies a voltage higher than the voltage of the main power source by a predetermined voltage to the load from the auxiliary power source through the hybrid selection unit; a reference voltage unit that holds a minimum voltage that is necessary for the load; and another voltage comparing unit that compares a power source voltage selected by the hybrid selection unit with the voltage of the reference voltage unit, wherein: the power source control unit suspends supply of power from the auxiliary power source during a period when the first voltage comparing unit determines that the voltage of the auxiliary power source is higher than the voltage of the main power source by a predetermined voltage or more and the another voltage comparing unit determines that the selected power source voltage is higher than the voltage of the reference voltage unit. |
地址 |
Osaka JP |