Brushless motor

Details Brushless motor Brushless motor

2007-08-24

2010-06-08

Benson, Walter (Department: 2837)

Electricity: motive power systems

Battery-fed motor systems

C318S400380, C318S400420

Reexamination Certificate

active

07733040

ABSTRACT:
In the m phase brushless motor, n (n<m) phase magnet coil groups are provided with magnetic sensors, while the remaining (m−n) phase magnet coil groups are not provided with magnetic sensors. The drive control circuit utilizes the sensor outputs of the n magnetic sensors to generates n sets of drive signals for the n phase magnet coil groups. The drive control circuit further generates (m−n) sets of drive signals for the (m−n) phase magnet coil groups not associated with the n magnetic sensors, using one or more of the sensor outputs of the n magnetic sensors in generation of each of the (m−n) sets of drive signals.

REFERENCES:
patent: 5157311 (1992-10-01), Hara et al.
patent: 5864192 (1999-01-01), Nagate et al.
patent: 7170243 (2007-01-01), Nakagawa et al.
patent: 7245051 (2007-07-01), Hosono et al.
patent: 7545110 (2009-06-01), Williams et al.
patent: 10-075594 (1998-03-01), None
patent: 2001-298982 (2001-10-01), None

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