Electricity: motive power systems – Limitation of motor load – current – torque or force
Patent
1978-02-23
1981-04-07
Smith, Jr., David
Electricity: motive power systems
Limitation of motor load, current, torque or force
318139, H02P 728
Patent
active
042609380
ABSTRACT:
A control circuit for a d.c. motor for an electric vehicle operates by controlling motor current in accordance with the error between a current demand signal and a signal derived from a current transducer. The current demand signal is generated by a potentiometer array, with the potentiometer slider connected to an input terminal of an operation amplifier. This amplifier has its output terminal connected by a resistor to a capacitor connected by another resistor to the base of an emitter follower transistor. The emitter of this transistor is coupled by a feedback resistor to the inverting input terminal of the operational amplifier.
REFERENCES:
patent: 3456177 (1969-07-01), Wilkerson
patent: 3484676 (1969-12-01), Wilkerson
patent: 3841238 (1974-10-01), Thompson et al.
patent: 3914671 (1975-10-01), Morton
Lucas Industries Limited
Smith Jr. David
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