Rheostatic control system for a DC motor

Details Rheostatic control system for a DC motor Rheostatic control system for a DC motor

1974-07-23

1976-07-27

Schaefer, Robert K.

Electricity: motive power systems

Series motors

Field circuit control

318257, 318300, H02P 708

Patent

active

039719731

ABSTRACT:
A rheostatic control system for controlling the speed and the direction of rotation of a DC motor which is employed mainly for controlling the speed of an electric vehicle or the like. The system comprises a sliding-contact rheostatic unit which is provided between a DC power supply and a DC motor and which includes stationary contacts and speed controlling resistors, whereby the speed control of the DC motor is accomplished by means of the speed controlling resistors, and the rotation of the DC motor in either direction is controlled by changing the polarity of the voltage applied to the polarity changing terminals of the DC motor.

REFERENCES:
patent: 609639 (1898-08-01), Wappler
patent: 1912411 (1933-06-01), Stansbury
patent: 2217254 (1940-10-01), Langgasser
patent: 2363132 (1944-11-01), Lightfoot et al.
patent: 2743408 (1956-04-01), Schmitt

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