Energization timing determination circuit and determination...

Details Energization timing determination circuit and determination... Energization timing determination circuit and determination...

2011-07-19

2011-07-19

Masih, Karen (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400130, C318S400140

Reexamination Certificate

active

07982420

ABSTRACT:
An energization timing determination circuit corrects a shift contained in a position signal outputted from a position detecting means and supplies energization timing appropriate to drive a motor. A correction amount computation unit computes detection intervals obtained based on position signals outputted from filters, comparators, and a position detection unit during one cycle of electrical angle. The correction amount computation unit thereby determines the duty shift length α and phase shift length β of the position signals. A control circuit corrects energization timing based on the position signals according to the detected shift lengths.

REFERENCES:
patent: 2009/0009117 (2009-01-01), Someya et al.
patent: A-2000-245190 (2000-09-01), None
patent: A-2004-297980 (2004-10-01), None
patent: A-2006-158022 (2006-06-01), None
Office Action dated Jun. 2, 2009 from the Japan Patent Office in the corresponding JP application No. 2007-316990 (and English Translation).

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