Speed sensitive field weakening control for traction motors

Details Speed sensitive field weakening control for traction motors Speed sensitive field weakening control for traction motors

1977-04-14

1978-12-26

Hohauser, Herman J.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318334, 318251, 318473, 318533, H02P 700

Patent

active

041318323

ABSTRACT:
Disclosed herein is a control for a direct current motor including a field weakening solenoid switch including a solenoid coil, which control includes a switch connected in series with a coil for connecting and disconnecting the coil to a source of direct current, and a device responsive to motor speed for operating the switch.
Also disclosed herein is an overspeed control for a direct current motor including a solenoid switch which controls energization of the direct current motor, which is biased open, and which includes a solenoid coil operable in response to energization thereof to close the switch, which overspeed control comprises a switch connected in series with the coil for selectively connecting the coil to a source of direct current, and a device responsive to motor speed for operating the switch.

REFERENCES:
patent: 2165082 (1939-07-01), Weber
patent: 3384799 (1968-05-01), Thiele
patent: 4035704 (1977-07-01), York

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