Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control
Reexamination Certificate
2007-06-22
2010-02-23
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Brushless motor closed-loop control
C318S400010, C318S400270, C318S400350, C318S721000
Reexamination Certificate
active
07667419
ABSTRACT:
A motor driving apparatus includes a virtual difference voltage detecting unit operable to detect a difference voltage between a virtual neutral point of a resistor circuit connected in parallel to motor coils and a terminal of a motor coil in non-conduction state, a rotor position detecting unit operable to detect a position of the rotor based on the difference voltage, and a controller operable to control commutation of an inverter based on the rotor position. The motor driving apparatus has a searching start mode for detecting the rotor position and energizes the coils, and a back electromotive voltage feedback mode for controlling commutation based on the back electromotive voltage. In the searching start mode, a rotor position searching process and a rotation start torque applying process are alternately performed.
REFERENCES:
patent: 5663618 (1997-09-01), Adachi et al.
patent: 5818179 (1998-10-01), Kokami et al.
patent: 5834911 (1998-11-01), Kimura
patent: 5915070 (1999-06-01), Takekawa et al.
patent: 6759827 (2004-07-01), Kawashima
patent: 2003/0102832 (2003-06-01), Iwanaga et al.
patent: 2004/0056628 (2004-03-01), Kandori
patent: 0251785 (1988-01-01), None
patent: 1318595 (2003-06-01), None
patent: 63-069489 (1988-03-01), None
patent: 4-046583 (1992-02-01), None
patent: 7-83628 (1995-09-01), None
patent: 2547778 (1996-08-01), None
patent: 2003-174789 (2003-06-01), None
patent: 2003219683 (2003-07-01), None
patent: 2004-104846 (2004-04-01), None
Fukamizu Shingo
Kuroshima Shinichi
Mori Hideaki
Yamamoto Yasunori
Dinh Thai
Panasonic Corporation
RatnerPrestia
Ro Bentsu
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