Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1994-05-02
1996-01-02
Martin, David S.
Electricity: motive power systems
Switched reluctance motor commutation control
318439, H02K 2300
Patent
active
054811678
ABSTRACT:
A circuit and method for detecting when the back emf of a motor coil passes a predetermined level includes circuitry for providing a voltage proportional to the back emf of the motor coil, and circuitry for providing a voltage proportional to a reference potential. A first bias voltage is added to the voltage proportional to the back emf to produce a first added voltage, and a second bias voltage is added to the reference potential when the back emf of the motor coil is expected to change in a predetermined direction to produce a second added voltage. A comparator produces an output change when the first added voltage becomes larger than the second added voltage at the predetermined level.
REFERENCES:
patent: 4169990 (1979-10-01), Erdman
patent: 4390826 (1983-06-01), Erdman et al.
patent: 4636936 (1987-01-01), Boyd et al.
patent: 4922169 (1990-05-01), Freeman
patent: 4928043 (1990-05-01), Plunkett
Carobolante Francesco
Rohrbaugh Mark E.
Anderson Rodney M.
Bachand Richard A.
Jorgenson Lisa K.
Martin David S.
SGS-Thomson Microelectronics Inc.
LandOfFree
Amplifier and method for detecting the bemf of a coil of a polyp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Amplifier and method for detecting the bemf of a coil of a polyp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplifier and method for detecting the bemf of a coil of a polyp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-237713