Operating apparatus for electrically driven vehicles

Details Operating apparatus for electrically driven vehicles Operating apparatus for electrically driven vehicles

1974-02-12

1976-02-03

Schaefer, Robert K.

Electricity: motive power systems

Battery-fed motor systems

318373, H02P 506

Patent

active

039367070

ABSTRACT:
An operating apparatus for electrically driven vehicle, for example a fork lift truck, of the type that has an electric motor connected to a DC source via a chopper circuit. The apparatus includes a relay for supplying DC power to said motor, a switching element for operating the relay and a transistorized detector circuit pararelly connected to said switching element which sense the normal operation of the chopper circuit, and makes the switching element non-conductive in the event of malfunctioning. Further, the apparatus includes a chopper control circuit for controlling the chopper circuit effectively and a overcurrent detector circuit for control chopper current by detecting the overcurrent.

REFERENCES:
patent: 3349309 (1967-10-01), Dannettell
patent: 3710216 (1973-01-01), Smith
patent: 3716767 (1973-02-01), Kuriyama et al.
patent: 3764870 (1973-10-01), Morton
patent: 3826959 (1974-07-01), Anderson
patent: 3828235 (1974-08-01), Price et al.

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