Precision constant current control with automatic compensation

Details Precision constant current control with automatic compensation Precision constant current control with automatic compensation

H - Electricity

02

M

323/2, 320/7

H02M 7/00 (2006.01)

Patent

CA 1253566

PRECISION CONSTANT CURRENT CONTROL WITH AUTOMATIC COMPENSATION ABSTRACT A circuit is provided having an alternating current input and a synchronous switch means which has a control coil -- such as a saturable reactor -- with the input, so as to control the energy throughput of the synchronous switch means and therefore the output of the circuit. The current through the control coil is sensed and maintained in such a manner that the ampere-turns ratio of the control coil is maintained constant, thereby ensuring that the output of the circuit will be at a constant current irrespective of the internal resistance of the control coil or changes of that resistance. The output of the circuit may be an alternating current; more generally, it would be a direct current for such use as a battery forming and charging circuit.

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