Boots – shoes – and leggings
Patent
1990-03-22
1993-04-13
Black, Thomas G.
Boots, shoes, and leggings
180 791, B62D 504
Patent
active
052028305
ABSTRACT:
A PWM motor drive control circuit for an electric power steering system, comprising: a bridge circuit having four arms each defined by a transistor; a main control unit for producing a continual direction control signal and a torque control signal of a variable duty ratio to activate the electric motor in a desired direction at a desired torque according to a steering command signal supplied thereto; a sub control unit for producing a second direction control signal according to the steering command signal; and a gate drive control circuit for transmitting the first direction control signal and the torque control signal to the transistors only when the first direction control signal produced by the primary control unit coincides with the second direction control signal produced by the sub control unit. Thereby, the reliability of an electric motor powered steering system can be improved with a simple circuit structure even when the torque control signal consists of an extremely high frequency variable duty ratio signal.
REFERENCES:
patent: 4621327 (1986-11-01), Dolph et al.
patent: 4652002 (1987-03-01), Kurokawa et al.
patent: 4719396 (1988-01-01), Shimizu
patent: 4736810 (1988-04-01), Morishita et al.
patent: 4799566 (1989-01-01), Shimizu
patent: 4819170 (1989-04-01), Shimizu
patent: 4913249 (1990-04-01), Lang
patent: 4939653 (1990-07-01), Tsurumiya et al.
patent: 4959787 (1990-09-01), Morishita et al.
Izawa Masataka
Tsurumiya Osamu
Black Thomas G.
Burt Pamela S.
Carrier Joseph P.
Honda Giken Kogyo Kabushiki Kaisha
Park Collin W.
LandOfFree
Motor drive control circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Motor drive control circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor drive control circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1159775