Extended range regulated power supply

• US 4,713,554 A
• Filed: 04/14/1986
• Issued: 12/15/1987
• Est. Priority Date: 04/14/1986
• Status: Expired due to Fees

• Current Assignee: Asubio Pharma Co., Ltd. (Daiichi Sankyo Company Limited)
• Original Assignee: Powercube Corporation
• Inventors: Henderson, Ross
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Blum, Richard K.
• Application Number:
  US06/851,227
• Time in Patent Office: 610 Days
• Field of Search: 307/64, 307/65, 307/66, 363/41, 363/65, 363/67, 363/125, 363/129
• US Class Current: 307/64
• CPC Class Codes: H02J 9/061 for DC powered loads
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y04S 20/20 End-user application control systems

Abstract

An extended range regulated power supply which provides a constant output despite extreme variations in line potential, which in the present embodiment may exceed 50%. The power supply maintains high efficiency by operating with a first unregulated supply voltage just above the minimum voltage required by the linear regulator to maintain the desired output voltage. Upon severe low line or drop-out conditions, a second unregulated voltage supply is connected to the input of the linear regulators to maintain constant output voltage. Both of the unregulated potentials are derived from a transformer wherein the second unregulated source will be at least the voltage necessary for the regulators to maintain the desired output voltage under the maximum line drop-out voltage. The standby unregulated potential is switched by a solid state (FET) switch which acts instantaneously to provide a continuity of output voltage and may be configured to selectively switch in a range of standby potentials as well as a proportional pulse configured to provide modulated switching action.

Claims

1. A power supply for use with a unregulated input supply comprising:

a first means for receiving said unregulated input supply providing a first output;

a second means for receiving said unregulated input supply providing a second output;

a voltage regulator for receiving said first output at an input and providing a regulated output;

means for detecting a drop-out in said unregulated input supply potential and providing a control output signal in response to the drop-out in unregulated supply potential; and

a switch to selectively provide said second output to said voltage regulator input upon receipt of said control signal permitting said voltage regulator to continuously maintain a regulated output.

2. The power supply of claim 1 wherein said switch comprises:

an electronic semiconductor switch; and

means to energize said electronic semiconductor switch upon receipt of said control signal.

3. The power supply of claim 1 wherein said means to detect a drop-out comprises:

reference means providing a threshold potential; and

comparator means receiving said threshold potential and a signal proportional to one of said first potential and said second potential.

4. The power supply of claim 1 wherein said control signal comprises a pulse width modulated signal.

5. The power supply of claim 1 wherein:

said first and second means for receiving said unregulated input supply include a transformer having a secondary winding having at least one tap thereon to provide a plurality of secondary voltage.