Electricity: motive power systems – Constant motor current – load and/or torque control
Patent
1986-05-23
1988-01-12
Ro, Bentsu
Electricity: motive power systems
Constant motor current, load and/or torque control
318293, 318488, 180 644, 180 65, B62D 504, H02P 122
Patent
active
047193964
ABSTRACT:
An electric motor drive circuit (9; 209) in an electric power steering system (50) for vehicles includes a control mechanism (8, 9a) for producing a control signal (T.sub.2, T.sub.3, T.sub.4, T.sub.5) for controlling an electric motor (7) to produce auxiliary torque to be supplied to an output shaft (4), taking into consideration an output signal (S.sub.1, S.sub.2) from a steering torque detection mechanism (3) to detect steering torque (Ts) acting on an input shaft (1). The electric motor drive circuit (9; 209) is for controlling the electric motor (7) by receiving the control signal (T.sub.2, T.sub.3, T.sub.4, T.sub.5) from the control mechanism (8, 9a). The electric motor drive circuit (9; 209) comprises a bridge circuit (60) having between input terminals (61, 62) thereof an electric power (26) connected thereto and between output terminals (63, 64) thereof the electric motor (7) connected thereto. The bridge circuit (60) consisting of four FET's (30a, 30b, 31a, 31b) arranged in pairs (30a, 30b and 31a, 31b) respectively constituting opposite bridge sides, each pair (30a, 30b and 31a30b) having one FET (30a, 31a) thereof on-driven with the control signal (T.sub.4, T.sub.5) from the control mechanism (8, 9a) and the other FET (30b, 31b) thereof PWM-driven with the control signal (T.sub.2, T.sub.3).
REFERENCES:
patent: 4275340 (1981-06-01), Schleupen
patent: 4454454 (1984-06-01), Valentine
patent: 4523134 (1985-06-01), Kinoshita et al.
patent: 4538698 (1985-09-01), Hashimoto et al.
patent: 4544869 (1985-10-01), Pittaway
patent: 4568863 (1986-02-01), Rouf
Honda Giken Kogyo Kabushiki Kaisha
Ro Bentsu
LandOfFree
Electric motor drive circuit for electric power steering systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric motor drive circuit for electric power steering systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric motor drive circuit for electric power steering systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-922348