Toroidal transformer with magnetic shunt

• US 5,400,005 A
• Filed: 03/22/1993
• Issued: 03/21/1995
• Est. Priority Date: 01/13/1992
• Status: Expired due to Fees

• Current Assignee: ALBAR, Inc.
• Original Assignee: ALBAR, Inc.
• Inventors: Bobry, Howard H.
• Primary Examiner(s): Kozma, Thomas J.
• Application Number:
  US08/034,310
• Time in Patent Office: 729 Days
• Field of Search: 336/83, 336/213, 336/234, 336/233, 336/229, 336/178, 336/73, 336/120, 336/165, 336/212, 336/221
• US Class Current: 336/83
• CPC Class Codes: H01F 3/06 made from wires
• CPC Class Codes: H01F 3/12 Magnetic shunt paths
• CPC Class Codes: H01F 30/16 Toroidal transformers
• CPC Class Codes: Y10S 174/25 Transformer

Abstract

A transformer or inductor is made by wrapping a magnetic core material about a toroid-like structure made up of one or more electrical windings. A ferroresonant transformer may be constructed by including a slotted washer between primary and secondary windings. By shorting one of the windings, the ferroresonant transformer can be made into a gapped inductor with the gap totally enclosed within the core.

Claims

1. A ferroresonant transformer comprising:

a primary winding;

a secondary winding;

a generally planar magnetic shunt, having a central opening, an inner edge about said opening and an opposite outer edge, said shunt being sandwiched between said windings to form together a toroid-like structure having a surface and a central passage;

a magnetic core formed from a continuous length of material wound around said surface through said passage, at least one of said inner and outer edges being spaced away from said core.

2. A ferroresonant transformer according to claim 1, wherein said magnetic shunt is a slotted washer.

3. A ferroresonant transformer according to claim 1, wherein said magnetic shunt is a coil of insulated magnetic wire.