Valve timing control apparatus

Details Valve timing control apparatus Valve timing control apparatus

2008-11-07

2011-12-13

Benson, Walter (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S599000, C318S807000, C318S767000, C318S727000

Reexamination Certificate

active

08076899

ABSTRACT:
An electric power supply driver executes duty control of turning on and off of a selected switching element to supply electric power to a corresponding stator coil in a case where an actual rotational direction and a target rotational direction of a motor shaft coincide with each other. Furthermore, the driver sets an on-duty ratio of the selected switching element below a lower limit value, which is at least required to rotate the motor shaft through the power supply to each corresponding stator coil in a case where the actual rotational direction and the target rotational direction do not coincide with each other.

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patent: 6953013 (2005-10-01), Tani
patent: 7077087 (2006-07-01), Tani
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patent: 7440827 (2008-10-01), Kawada et al.
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patent: 2000-170513 (2000-06-01), None
patent: 2004-350446 (2004-12-01), None

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