US 12,144,073 B1
Voltage doubling circuit for powering a load
Scott T. Sikora, Gilbert, AZ (US)
Assigned to Tomar Electronics, Inc., Gilbert, AZ (US)
Filed by Tomar Electronics, Inc., Gilbert, AZ (US)
Filed on Sep. 29, 2023, as Appl. No. 18/478,707.
Int. Cl. H05B 41/32 (2006.01); H02M 7/04 (2006.01)
CPC H05B 41/32 (2013.01) [H02M 7/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A voltage doubling circuit configured for providing power to a strobe light, the circuit comprising:
a positive terminal and a negative terminal configured to couple across an alternating current voltage source;
at least one resistor connected in a parallel configuration with each of at least one non-polar charging capacitor forming a parallel combination, the parallel combination together being connected in series between the positive terminal and the first output terminal;
a second output terminal coupled to the negative terminal;
a diode connected in series between the parallel combination and the first output terminal and configured to allow the flow of current from the capacitors to the first output terminal;
a polar storage capacitor having an anode coupled between the diode and the first output terminal, and a cathode coupled to the negative terminal;
a silicon controlled rectifier (SCR) having a cathode coupled between the parallel combination and the diode, and an anode coupled to the negative terminal; and
a control circuit having a first connection to the positive terminal, a second connection to the negative terminal, and a third connection to a gate of the SCR, the control circuit configured to switch the SCR between an on state to allow the flow of electricity through the SCR, and an off state to restrict the flow of electricity through the SCR;
wherein during a negative half of an AC cycle the control circuit is configured to control the SCR to allow the flow of electricity such that the at least one non-polar charging capacitor is charged to a maximum voltage, and during a positive half of the AC cycle the control circuit is configured to control the SCR to restrict the flow of electricity such that the at least one non-polar charging capacitor discharges through the diode and into the polar storage capacitor;
wherein by charging the polar storage capacitor through the SCR, the polar storage capacitor is prevented from being over-voltaged even if the SCR fails; and
wherein the first output terminal and the second output terminal are configured to provide power to a strobe light.