Direct current control in inductive loads

Details Direct current control in inductive loads Direct current control in inductive loads

G - Physics

05

F

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G05F 1/56 (2006.01) H01H 47/32 (2006.01) H02M 3/156 (2006.01) H02P 7/29 (2006.01)

Patent

CA 1173503

13130:CRH DIRECT CURRENT CONTROL IN INDUCTIVE LOADS Abstract of the Disclosure A DC current control is provided for inductive loads which achieves high energy efficiency even though the supply voltage may be subject to considerable variations. The inductive load may be a DC motor, a solenoid, or similar device. The electric power is applied directly to the inductive load through a switching means which closes the circuit to apply a charging current to the inductive load for fixed on periods of time. A discharge path is provided for the inductive load when the switching means opens the charging circuit. The discharge current is monitored, and when it decays to a selected value, the switching means is again closed for the fixed on charge time.

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