Electric throttle and motor control circuitry

Details Electric throttle and motor control circuitry Electric throttle and motor control circuitry

1994-01-27

1995-05-09

Shoop, Jr., William M.

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

388903, 388910, 388930, 388829, H02P 517

Patent

active

054147921

ABSTRACT:
A solid state, electric motor control circuit is provided in conjunction with a solid state throttle and vehicle sensor circuit that together incorporate; a Hall Effect throttle position sensor circuit, a throttle position signal amplifier circuit, a vehicle reverse condition circuit, a vehicle operation inhibit circuit, a pulse width modulation circuit, and inverting MOSFET driver circuit, a plurality of power MOSFET devices, a voltage regulator circuit, and a current delivery circuit associated with an external DC electric motor. These circuit elements combine to translate a mechanical throttle position into a voltage level signal that can be converted by pulse width modulation circuitry into a pulsed wave form signal that suitably drives a bank of MOSFET, solid state switches so as to control the flow of current through a DC electric motor. The circuit isolates the DC power source from the power drain components in the circuit and communicates vehicle conditions, such as reverse/forward direction and on/off operation, from the vehicle itself to the power controller circuitry. The circuitry incorporates internal elements that raise reliability while still providing versatility in application. Although the present circuitry involves voltage regulation components, it also utilizes current limiting elements as well as over-voltage protection and significant levels of signal filtering.

REFERENCES:
patent: 4673851 (1987-06-01), Dissen
patent: 4705997 (1987-11-01), Juzwik
patent: 5029229 (1991-07-01), Nelson, III
patent: 5087865 (1992-02-01), Nelson, III
patent: 5162707 (1992-11-01), Joseph
patent: 5179621 (1993-01-01), Nelson, III
patent: 5220634 (1993-06-01), Vaguchi et al.
patent: 5267344 (1993-11-01), Nelson, III
patent: 5317669 (1994-05-01), Anderson et al.

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