Electricity: motive power systems – Electric motor with nonmotor driving means – Manual driving means
Patent
1997-01-23
1999-05-04
Masih, Karen
Electricity: motive power systems
Electric motor with nonmotor driving means
Manual driving means
180205, 180171, 482 63, 482903, 745022, H02K 700
Patent
active
059007036
ABSTRACT:
A motor control system for use in an electrical-motorized bicycle is disclosed. The motor control system includes a plurality of magnets arranged in a ring which is rotatable about the crank axle of the bicycle by the rotation of the chainwheel. A cover member is rotatably fit over the ring of the magnets and is fixed to the bicycle frame. At least two sensors are arranged on the cover member to detect the rotational speed and direction of the magnets and thus generating a signal to indicate the change of the rotational speed and direction of the chainwheel for controlling the operation of an electrical motor that is mechanically coupled to and drives the bicycle wheel so that only when the chainwheel is rotated in the direction to drive the bicycle forward, the motor is actuated to drive the bicycle wheel. Once the chainwheel stops, the motor is turned off and no torque is applied to the bicycle wheel.
REFERENCES:
patent: 4331918 (1982-05-01), Dunch
patent: 5027303 (1991-06-01), Witte
patent: 5324242 (1994-06-01), Lo
patent: 5551315 (1996-09-01), Pikoulas
patent: 5560266 (1996-10-01), Shikimori et al.
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