Regenerative braking system for three-terminal d.c. motor

Details Regenerative braking system for three-terminal d.c. motor Regenerative braking system for three-terminal d.c. motor

1981-03-13

1983-05-17

Dobeck, B.

Electricity: motive power systems

Plural diverse motor controls

318139, 318376, 318297, H02P 516, H02P 314

Patent

active

043842402

ABSTRACT:
A pulse control circuit for a three-terminal d.c. series motor having an armature and two oppositely-wound field windings comprises a respective main thyristor in series with each field winding, one or other of the main thyristors being operated at a variable mark-to-space ratio to energize the field winding appropriate to drive the motor in a selected direction. The circuit includes switch means operable to connect the motor in a regenerative braking mode in which the armature and each field winding are connected to the battery in series with a freewheel diode and with a diode across the motor so that charging current can flow from the motor to the battery during regenerative braking. Circuit means are provided to effect initial energization of at least one field winding when the circuit is first switched to the regenerative braking mode.

REFERENCES:
patent: 3727118 (1973-04-01), Makino
patent: 4104571 (1978-08-01), Gukwicz et al.

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