Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1982-10-22
1985-04-16
Weldon, Ulysses
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318331, 318345AB, 361154, G05B 500, H02K 2720, H01H 4732
Patent
active
045118299
ABSTRACT:
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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I. Gottlieb, "Switching Regulators and Power Supplies", Tab Books Inc., 1976, pp. 25-28.
Exploration Logging, Inc.
Weldon Ulysses
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