Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1977-07-13
1979-05-01
Rubinson, Gene Z.
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318332, H02P 500
Patent
active
041526325
ABSTRACT:
A speed control system is disclosed for a direct current motor drive energized by a thyristor armature supply. Voltage regulation for the thyristor supply is through a parallel current controller in which an armature current controller is arranged in parallel with positive and negative rate current controllers, the output of this parallel combination being applied as a voltage control signal to the thyristor supply through a parallel switch which mandates priority of control. Normally, the current controller will determine the thyristor armature supply voltage, but if the armature current rate exceeds a preset current rate reference, the parallel switch intercedes and the appropriate rate current controller takes over control of the thyristor supply voltage. When the thyristor armature supply current rate goes below the rate reference setting, the armature current controller will again resume control of the thyristor supply voltage.
REFERENCES:
patent: 3284688 (1966-11-01), Black
patent: 3378743 (1968-04-01), Weiser
patent: 3629633 (1971-12-01), O'Callaghan
patent: 3983464 (1976-09-01), Peterson
Mutter M. K.
Rubinson Gene Z.
Westinghouse Electric Corp.
Wood James J.
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