H - Electricity – 02 – J
Patent
H - Electricity
02
J
321/83
H02J 7/10 (2006.01) H02J 7/00 (2006.01) H02J 7/02 (2006.01) H02M 1/10 (2006.01) H02M 3/335 (2006.01) H02M 7/06 (2006.01)
Patent
CA 1202074
ABSTRACT OF THE DISCLOSURE An electronic switching power supply for supplying power to an electrical load from a variable voltage level AC or DC voltage source having first and second terminals, the power supply including a transformer having a primary coil and a secondary coil, a first terminal of the secondary coil being connected to the electrical load, a first transistor connected in series with the primary coil, a first diode connected in series with the secondary coil and the electrical load, a first capacitor connected between the base of the first transistor and a second terminal of the secondary coil, a second transistor, the collector-emitter line of which is connected across the voltage source, a first resistor connected between the first terminal of the secondary coil and the collector of the second transistor, a second resistor connected between the first terminal of the secondary coil and the emitter of the first transistor, and a discharge circuit connected between the first capacitor and the electrical load, whereby the first capacitor is electrically charged during a conducting phase of the first transistor, and during a subsequent blocking phase of the first transistor, the electrical load receives the charge built up in the first capacitor during the preceding conducting phase.
428320
Bergk Gunther
Schwarz Gerhard
Braun Aktiengesellschaft
Macrae & Co.
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