Control circuit arrangement for DC motors

Details Control circuit arrangement for DC motors Control circuit arrangement for DC motors

1978-04-03

1980-10-28

Truhe, J. V.

Electricity: motive power systems

With particular motor-driven load device

Tension-maintaining type of motor-control system

318331, 318338, 318342, H02P 500

Patent

active

042309751

ABSTRACT:
Means and method for controlling the power delivered to the shaft of a DC motor when the field of the motor becomes saturated and prevents control of armature voltage by the field of the motor. The method involves the step of increasing the current in the armature by an amount corresponding to the decrease in the voltage of the armature caused by a decrease in the speed of the armature during saturation of the field. Increasing armature current is effective to maintain power output of the motor constant. If the speed of the armature increases after the occurrence of saturation, the voltage of the armature increases, such that the method includes the additional step of decreasing armature current in proportion to the increasing armature voltage to maintain constant power output of the motor.

REFERENCES:
patent: 4019107 (1977-04-01), Dixon et al.
patent: 4079301 (1978-03-01), Johnson

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