DC brush motor rotation amount detection method and apparatus

Details DC brush motor rotation amount detection method and apparatus DC brush motor rotation amount detection method and apparatus

2007-10-16

2007-10-16

Masih, Karen (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S132000, C318S434000, C318S807000

Reexamination Certificate

active

11281187

ABSTRACT:
The present invention provides a DC brush motor rotation amount detection method comprising the steps of: counting pulses generated by switching of brushes when a DC brush motor rotates; removing any noise pulse generated during a pulse rejection period which is shorter than a pulse interval and which is started when each pulse is generated; counting pulses generated during pulse acceptance periods outside the pulse rejection periods; and detecting a rotation amount of the DC brush motor, wherein the pulse rejection period during steady-state operation of the DC brush motor is ended when a predetermined time elapses from a start point of the pulse rejection period, where the predetermined time is calculated by multiplying a pulse interval of a corresponding pulse zone one rotation before a pulse zone to which the pulse rejection period belongs by a coefficient K(½<K<1).

REFERENCES:
patent: 2005/0099153 (2005-05-01), Komatsu et al.

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