COMBINED TRANSFORMER AND INDICATOR DEVICE

• US 3,553,620 A
• Filed: 12/20/1967
• Issued: 01/05/1971
• Est. Priority Date: 09/14/1967
• Status: Expired due to Term

• Current Assignee: Harry S. Hoffman Jr, John R. Cielo
• Original Assignee: Harry S. Hoffman Jr, John R. Cielo
• Inventors: Cielo, John R., Hoffman, Harry S. Jr.
• Application Number:
  US04/691,996
• Time in Patent Office: 1,112 Days
• US Class Current: 336/165
• CPC Class Codes: G05F 1/62 using bucking or boosting dc sources
• CPC Class Codes: H02M 3/28 using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
• CPC Class Codes: H02M 3/33569 having several active switching elements H02M3/3353 takes precedence
• CPC Class Codes: H02M 3/33573 Full-bridge at primary side of an isolation transformer
• CPC Class Codes: H02M 3/3378 in a push-pull configuration of the parallel type H02M3/3374 takes precedence

Abstract

FIG-01 A DC-TO-DC POWE CONVERTER INCORPORATING A COMBINED TRANSFORMER AND INDUCTOR DEVICE COMPRISES OF A THREE-LEGGED MAGNETIC STRUCTURE HAVING AN AIR GAP IN THE CENTER LEG AND PRIMARY AND SECONDARY WINDINGS ARRANGED ON THE THREE LEGS TO PROVIDE COMBINED COOPERATIVE TRANSFORMER AND INDUCTO/R ACTION. THE PRIMARY AND SECONDARY WINDINGS ARE EACH OF PUSH PULL CONFIGURATION, AND IN ONE FORM THE COOPERATING PRIMARY AND SECONDARY WINDING PUSH ARE POLED AND LOCATED TO PROVIDE MMF-BUCKING ACTION APLYING THE ENTIRE PRIMARY MMF ACROSS THE INDUCTOR LEG, WHILE IN ANOTHER FORM ONLY THE CORE MAGNETIZING MMF IS SEEN ACROSS THE INDUCTOR LEG, AND AN ADDITIONAL PROMARY WINDING IS PROVIDED TO BOOST THE FLUX IN THAT LEG. IN EACH CASE THE INDUCTOR LEG HAS AN AIR GAP TO PROVIDE IT WITH SIGNIFICANTLY HIGHER RELUCTANCE THAN THAT OF THE REMAINDER OF THE MAGNETIC CIRCUIT.

Claims