US 6,982,499 B1 | ||
Power converting method and apparatus | ||
Tadayoshi Kachi, Kariya (Japan); Junichi Takeuchi, Kariya (Japan); and Seiki Sakata, Kariya (Japan) | ||
Assigned to Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya (Japan) | ||
Filed on Oct. 17, 2000, as Appl. No. 9/690,183. | ||
Claims priority of application No. 11-312402 (JP), filed on Nov. 02, 1999. | ||
Int. Cl. H02J 7/016 (2006.01) |
U.S. Cl. 307—75 | 13 Claims |
1. A method of supplying power using a main DC power supply for generating a predetermined voltage to supply a first output
voltage substantially equal to the predetermined voltage and a second output voltage lower than the predetermined voltage,
comprising the steps of:
connecting a first DC power supply for generating the same voltage as the second output voltage in series to a second DC power
supply for generating a differential voltage between the first output voltage and the voltage from the first DC power supply,
thereby forming the main DC power supply,
connecting a DC-DC converter to the second DC power supply; and
stepping down the voltage output from the second DC power supply to produce the second output voltage by using the DC-DC converter.
|