Shunt field control apparatus and method

Details Shunt field control apparatus and method Shunt field control apparatus and method

1980-11-24

1983-04-19

Dobeck, B.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318331, 318338, 318252, H02P 706

Patent

active

043807240

ABSTRACT:
A motor control is provided for a DC series motor operative with a chopper apparatus and including a thyristor switch to determine the field shunt operation of the motor. A voltage reversal that occurs across the field windings when the chopper is OFF and not conducting is utilized to commutate and enable modulation of the field shunt thyristor switch as desired in relation to the chopper ON and OFF operation.

REFERENCES:
patent: 3360705 (1967-12-01), Morris
patent: 3562616 (1971-02-01), Elliott
patent: 3906317 (1975-09-01), Narita
patent: 3947738 (1976-03-01), Oliver
patent: 3983465 (1976-09-01), Tsuboi et al.
patent: 4019108 (1977-04-01), Elvin
patent: 4282466 (1981-08-01), Matty
patent: 4284930 (1981-08-01), Matty

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