Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1998-06-25
1999-05-25
Shoop, Jr., William M.
Electricity: motive power systems
Switched reluctance motor commutation control
318721, 318439, 318138, 318727, H02P 622
Patent
active
059072253
ABSTRACT:
A method and an apparatus for driving a polyphase sensorless motor are disclosed. A method for driving a polyphase sensorless motor having a rotor and a plurality of pairs of phase coils detects first and second magnetic flux saturation time values from each of the plurality of pairs of phase coils by respectively and sequentially applying the first and second test current signals to the plurality of the pairs of phase coils, stores the detected first and second magnetic flux saturation time values, sets an average value of a plurality of magnetic flux saturation time difference values calculated from the first and second magnetic flux saturation time values corresponding to each of the plurality of the pairs of phase coils to an optimum test current application period, determines a driving-current application initial position of the polyphase sensorless motor based on the optimum test current application period, selects maximum magnetic flux saturation time values corresponding to each of the plurality of the pairs of phase coils from the first and second magnetic flux saturation time values of each of the plurality of the pairs of phase coils, sets a final maximum magnetic flux saturation time value detected from the selected plurality of maximum magnetic flux saturation time values to an optimum driving-current application period, and drives the polyphase sensorless motor based on the driving-current application initial position and the optimum driving-current application period. Accordingly, a video cassette recorder can accurately determine a driving position in either a stop status or a low-speed driving status of the head drum motor and can improve a driving character thereof.
REFERENCES:
patent: 4992710 (1991-02-01), Cassat
patent: 5028852 (1991-07-01), Dunfield
patent: 5038092 (1991-08-01), Asano et al.
patent: 5235264 (1993-08-01), Kaneda et al.
patent: 5254918 (1993-10-01), Ueki
patent: 5350987 (1994-09-01), Ueki
patent: 5608300 (1997-03-01), Kawabata et al.
patent: 5612605 (1997-03-01), Tao
Daewoo Electronics Co. Ltd.
Leykin Rita
Shoop Jr. William M.
LandOfFree
Method and apparatus for driving a polyphase sensorless motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for driving a polyphase sensorless motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for driving a polyphase sensorless motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-402988