Power supply arrangement with minimum interaction between plural loads

• US 4,079,295 A
• Filed: 10/01/1976
• Issued: 03/14/1978
• Est. Priority Date: 11/07/1975
• Status: Expired due to Term

• Current Assignee: RCA Corporation
• Original Assignee: RCA Corporation
• Inventors: den Hollander, Willem
• Primary Examiner(s): Wilbur, Maynard R.
• Assistant Examiner(s): Blum, T. M.
• Application Number:
  US05/728,630
• Time in Patent Office: 529 Days
• Field of Search: 315/411, 358/190, 321/2 HF, 336/170, 336/180, 336/182, 323/48, 323/60
• US Class Current: 315/411
• CPC Class Codes: H01F 27/006 with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance
• CPC Class Codes: H01F 30/04 having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies

Abstract

A source of alternating current in a power supply and deflection system of a television receiver is coupled to a primary winding of a transformer, a relatively closely coupled secondary winding of which provides a voltage which may be rectified for providing operating voltage for another portion of the receiver such as the vertical deflection system. Yet another portion of the receiver, such as the audio section, is energized by voltage derived from a winding so disposed around the transformer as to be energized by leakage flux from the transformer for substantially reducing the effects of variations of the audio loading on the deflection systems.

Claims

1. A power supply arrangement with minimum interaction between plural loads, comprising:

a deflection and power supply system providing a source of alternating current;

a transformer including a core providing a main flux path, a primary winding and second and third windings, said primary winding wound on said core and coupled to said source of alternating current for establishing magnetic flux in said core;

a first load;

said second winding being closely coupled to said core for having a first voltage induced therein by said flux in said core, said winding being coupled to said first load for supplying voltage thereto;

a second load being subject to variations;

said third winding being loosely wound about said core without encircling any leg of said core for having a second voltage induced therein by leakage flux and coupled to said second load such that any variations in said second load have substantially no effect on said first voltage and said source of alternating current.

2. A power supply arrangement according to claim 1 wherein said core comprises a two-window core.

3. A power supply arrangement according to claim 2 wherein said primary and second windings are wound to encircle the center leg of said core.

4. A power supply arrangement according to claim 3 wherein said third winding is wound about the outside two legs of said two-window core.

5. A power supply arrangement according to claim 1 wherein said transformer couples alternating current energy at said deflection rate to rectifying means in said deflection system for providing operating voltage thereto.

6. A power supply arrangement according to claim 1 wherein said transformer is the output transformer of said deflection system.