Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control
Reexamination Certificate
2007-02-13
2007-02-13
Duda, Rina (Department: 2837)
Electricity: motive power systems
Reciprocating or oscillating motor
Energizing winding circuit control
C318S254100, C318S434000
Reexamination Certificate
active
10834988
ABSTRACT:
A motor driving apparatus includes an inverter circuit for converting an output voltage of a power supply into a three-phase AC and outputting the same to the brushless motor, a rotor position estimation unit for estimating a rotor position of the brushless motor, and an inverter control unit for controlling the inverter circuit so that the brushless motor is driven by a current based on the estimated rotor position. The inverter control unit determines an advance angle of the current supplied to the brushless motor with respect to the estimated rotor position so as to minimize a deviation between a command rpm and an actual rpm. Therefore, it is possible to perform stable weak field control for the brushless motor, independently from the input voltage of the inverter circuit, without using predetermined control variables such as table values.
REFERENCES:
patent: 5783917 (1998-07-01), Takekawa
patent: 5982133 (1999-11-01), Murakami et al.
patent: 6307336 (2001-10-01), Goff et al.
patent: 6462492 (2002-10-01), Sakamoto et al.
patent: 6486627 (2002-11-01), Gabrys
patent: 6590360 (2003-07-01), Hirata et al.
patent: 6812667 (2004-11-01), Yasohara et al.
patent: 2002/0149342 (2002-10-01), Nakata et al.
patent: 1 237 274 (2002-09-01), None
patent: 2000-341991 (2000-12-01), None
patent: 3146791 (2001-01-01), None
patent: 2003-088157 (2003-03-01), None
patent: 2003-0022023 (2003-03-01), None
K. Hatanaka et al., No. 74, Rpm Control System Using Weak Magnetic Flux Control of PM Motor, “Variable Speed Drive System of Permanent Magnet Synchronous Motors with Flux-weakening Control”, International Symposium of Industry Applications Society of the Institute of Electrical Engineers of Japan, pp. 310-315.
Patent Abstracts of Japan, vol. 1995, No. 06, Jul. 31, 1995 & JP 07 087783 A, (Fujitsu General Ltd), Mar. 31, 1995.
Patent Abstracts of Japan, vol. 017, No. 085, Feb. 19, 1993 & JP 04 281387 A, Oct. 6, 1992 *abstract*.
Patent Abstracts of Japan, vol. 2002, No. 06, Jun. 4, 2002 & JP 2002 045591, Feb. 12, 2002 *abstract*.
Nakata Hideki
Ueda Mitsuo
Duda Rina
Wenderoth , Lind & Ponack, L.L.P.
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