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US 5,398,182 AGranted
Power supply
AssigneeNamco Controls Corporation
InventorRobert J. Crosby
Life of this patent
Estimating the term…
Abstract
A power supply wherein the rectified output of two or more transformer secondaries are connected in series and then parallel each half cycle of an alternating current energization signal. Logic circuitry monitors the rectified output and automatically switches from a series to a parallel connection to provide a regulated power supply output.
Claims19
A power supply comprising:
- a) a transformer having a primary winding inductively coupled to first and second secondary windings to induce time varying voltages across said first and second secondary windings in response to energization of the primary winding by an alternating current input signal having a characteristic frequency and period;
- b) rectifier means coupled to the transformer for rectifying the time varying voltages induced in the first and second secondary windings and providing first and second pulsed power supply signals to a power supply output;
- c) output means for coupling the first and second pulsed power supply signals from the rectifier means to a load;
- d) switching means for coupling the first and second pulsed power supply signals from the rectifier means to the output means, said switching means including switch circuitry for, first connecting the power supply signals in series and then in parallel during each successive period of the alternating current input signal;
- and
- e) sensing means coupled to the rectifier means for sensing voltage at a control output coupled to the load and actuating the switching means to switch from a series to a parallel connection of the first and second pulsed power supply signals during each successive period of the alternating current input signal.
3 more elements
A method for providing a regulated direct current voltage signal from an alternating current input signal having a frequency and period comprising the steps of:
- a) transforming the alternating current input signal into first and second alternating current power supply signals;
- b) rectifying the first and second alternating current power supply signals to produce first and second pulsed power supply signals;
- c) providing switching circuitry for alternately coupling the first and second pulsed power supply signals in series and then in parallel across a storage device to provide a regulated direct current voltage signal at an output from the storage device;
- d) coupling the storage device output to a load for energizing the load;
- e) sensing a control voltage at a control junction electrically coupled to the load;
- and
- f) actuating the switching circuitry to switch from a series to a parallel connection of the first and second pulsed power supply signals during each period of the alternating current input signal based on the control voltage.
4 more elements
A power supply comprising:
- a) input means for receiving an alternating current input signal and providing first and second cyclically varying signals;
- b) rectifier means coupled to the input means for rectifying the first and second cyclically varying signals to provide first and second pulsed power supply signal;
- c) output means having a power supply output for coupling the first and second pulsed power supply signals from the rectifier means to a load;
- d) switch means for connecting the first and second pulsed power supply signals from the rectifier means, first in series and then in parallel during each successive cycle period of the alternating current input signal;
- and
- e) sensing means for causing a switch during each cycle period from a series to a parallel connection of the first and second pulsed power supply signals as a sensed power supply output varies.
3 more elements
Dependencies are inferred from the claim text.