Title:
POWER UNIT FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP3161232
Kind Code:
B2
Abstract:
PURPOSE: To provide a power unit for internal combustion engine which can supply DC power to a load even when the rotating speed of an internal combustion engine is extremely low.
CONSTITUTION: A power unit for internal combustion engine is provided with a rectifying power source section 10 with a voltage regulator which is supplied with electric power from a permanent-magnet generator 1, switch circuit 2 which uses MOSFETs F1 and F2 as switching elements and short-circuits the output terminals of the generator 1 to each other, and FET control circuit 5 which repeatedly turns on the MOSFETs F1 and F2 when the output voltage of the power source section 10 is equal to or lower than a set value or maintains the MOSFETs at turned-off states when the output voltage exceeds the set value. By turning on/off the MOSFETs, the output voltage of the generator 1 is boosted so as to secure the voltage required to drive a load when an internal combustion engine is operated at a low speed. In addition, the loss caused by the switching of the MOSFETs is reduced by turning on/off the MOSFETs only when the engine is operated at a low speed.
Inventors:
Tsuneaki Endo
Application Number:
JP15393394A
Publication Date:
April 25, 2001
Filing Date:
July 05, 1994
Export Citation:
Assignee:
Kokusan Denki Co., Ltd.
International Classes:
H02J7/16; H02J7/14; H02M7/06; H02M7/12; H02P9/30; H02P9/48; (IPC1-7): H02J7/14
Domestic Patent References:
| JP5935538A | ||||
| JP5344799A | ||||
| JP61108043U |
Attorney, Agent or Firm:
Hidetoshi Matsumoto (1 outside)