Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2006-04-04
2006-04-04
Ip, Paul (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S811000, C318S809000, C318S606000
Reexamination Certificate
active
07023173
ABSTRACT:
An apparatus for driving a brushless motor and method of controlling the motor, which actively changes an output time of a phase commutation signal depending on variation of a load and stably operating the motor in an overloaded state and improving an operational efficiency of a system. The apparatus for driving a brushless motor includes an inverter, a driver, a counter-electromotive voltage detector and a controller. The inverter switches driving voltages applied to multi-phase stator coils. The driver drives the inverter. The counter-electromotive voltage detector detects a counter-electromotive voltage induced from an unexcited stator coil. The controller calculates a time required to detect a counter-electromotive voltage through the counter-electromotive voltage detector after the driving voltage is turned off, determines a phase commutation point of time based on the determined elapsed time, and controls the driver to perform phase commutation at the determined phase commutation time.
REFERENCES:
patent: 5221881 (1993-06-01), Cameron
patent: 5306988 (1994-04-01), Carobolante et al.
patent: 5317243 (1994-05-01), Cameron
patent: 5428273 (1995-06-01), Doring
patent: 5672948 (1997-09-01), Cohen et al.
patent: 5859512 (1999-01-01), Buthker
patent: 6034493 (2000-03-01), Boyd et al.
patent: 6057674 (2000-05-01), Bangerter
patent: 6153989 (2000-11-01), Kardash et al.
patent: 6181093 (2001-01-01), Park et al.
patent: 6462495 (2002-10-01), Copeland
patent: 6479956 (2002-11-01), Kawabata et al.
patent: 6534938 (2003-03-01), Wu et al.
patent: 6661192 (2003-12-01), Copeland
patent: 6850022 (2005-02-01), Liu et al.
patent: 6879124 (2005-04-01), Jiang et al.
patent: 2002/0030462 (2002-03-01), Matsushiro et al.
patent: 2002/0033684 (2002-03-01), Jensen et al.
patent: 2003/0062860 (2003-04-01), Wu et al.
patent: 2004/0135530 (2004-07-01), Liu et al.
patent: 10-189122 (1998-06-01), None
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