Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
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:
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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
Franz, Jr. James H.
Jones Stanley W.
Brodahl R. G.
Dobeck B.
Moose Richard M.
Westinghouse Electric Corp.
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