Electricity: motive power systems – Switched reluctance motor commutation control
Reexamination Certificate
2005-09-20
2005-09-20
Masih, Karen (Department: 2837)
Electricity: motive power systems
Switched reluctance motor commutation control
C318S132000, C318S434000
Reexamination Certificate
active
06946808
ABSTRACT:
Conventional position-sensorless motor drive control circuits start a motor by a method that has the disadvantage that the motor is not always started in the forward direction or by a method that has the disadvantage that a current detection resistor produces a power loss. According to the invention, a motor drive control circuit that controls, with drive signals, a drive portion that feeds drive currents to the stator coils of a motor has a drive signal output circuit that outputs rotor position detection drive signals to the drive portion before the starting of the motor and a detection circuit that receives the common-terminal voltage of the stator coils when the drive signal output circuit is outputting the rotor position detection drive signals and that detects, according to the common-terminal voltage of the stator coils, the position of the rotor before the starting of the motor.
REFERENCES:
patent: 5432414 (1995-07-01), Sakurai et al.
patent: 6316894 (2001-11-01), Hashimura
patent: 62-189993 (1987-08-01), None
patent: 04-046583 (1992-02-01), None
patent: 04-101696 (1992-04-01), None
patent: 5-268791 (1993-10-01), None
Arent & Fox PLLC
Masih Karen
Rohm & Co., Ltd.
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