Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Patent
1998-09-15
1999-10-19
Gaffin, Jeffrey
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
318254, 318281, 318293, 318446, H02P 102
Patent
active
059699191
ABSTRACT:
A drive unit for driving an electric motor includes two motor drive circuits disposed in parallel and each consisting of a bridge circuit of switching devices each incorporating a reverse blocking diode, a power switch provided between a power supply and each of the bridge circuits, and a function switch provided between the electric motor and each of the bridge circuits. In case of failure of one bridge circuit, the other bridge circuit is used to replace the failed bridge circuit, thereby continuing controlled operation of the electric motor. While these switches which are associated with one of the bridge circuits are closed, the switches associated with the other bridge circuit are kept open. This arrangement prevents the current from flowing from the power supply into the failed bridge circuit. The failed bridge circuit does not allow the electric motor to act as a generator even when any of the switching devices causes an ON fault.
REFERENCES:
patent: 3984741 (1976-10-01), Kind
patent: 4146826 (1979-03-01), Wojslawowicz
patent: 4972133 (1990-11-01), Hirota et al.
patent: 5032774 (1991-07-01), Juzswik
patent: 5369349 (1994-11-01), Tsuchiya et al.
patent: 5903121 (1999-05-01), Heine et al.
Kobayashi Akio
Kurosawa Takao
Sugitani Nobuo
Tsurumiya Osamu
Gaffin Jeffrey
Honda Giken Kogyo Kabushiki Kaisha
Huynh Kim
LandOfFree
Drive unit for electric 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 Drive unit for electric motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive unit for electric motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2064021