High-voltage transformer for a television receiver

• US 5,751,205 A
• Filed: 02/15/1996
• Issued: 05/12/1998
• Est. Priority Date: 02/27/1995
• Status: Expired due to Fees

• Current Assignee: Deutsche Thomson-Brandt Gmbh (Vantiva SA)
• Original Assignee: Deutsche Thomson-Brandt Gmbh (Vantiva SA)
• Inventors: Goseberg, Walter
• Primary Examiner(s): Scott, J. R.
• Assistant Examiner(s): MAI, ANH T
• Application Number:
  US08/602,181
• Time in Patent Office: 817 Days
• Field of Search: 336/178, 336/171, 336/170, 336/165, 336/181
• US Class Current: 336/178
• CPC Class Codes: H01F 38/42 Flyback transformers
• CPC Class Codes: H02M 7/10 arranged for operation in series, e.g. for multiplication of voltage

Abstract

A transformer to achieve a precise amplitude for the operating voltages produced by the auxiliary windings, and such that the construction and production of the transformer are simplified. An auxiliary winding is split into a plurality of winding elements disposed in different chambers of a chamber-type coil former. One of the chambers is disposed in the region of the air gap of a U/I core or of a U/U core, the two U-core halves having parallel limbs of different lengths.

Claims

1. High-voltage transformer for a television receiver comprising:

a core

a primary winding,

a high-voltage winding,

an auxiliary winding,

the windings being located in a plurality of chambers located side by side in the axial direction of the core the auxiliary winding being split into a plurality of winding elements which are connected in series and which are located in different chambers, one of the chambers being located in the region of the air gap of a U/I core or of a U/U core and having less coupling,

the numbers of turns of said winding elements being chosen and distributed in both chambers so that the required operating voltage is precisely produced.

2. Transformer according to claim 1, wherein the winding elements are located in more than two separate chambers.

3. Transformer according to claim 1, wherein winding elements of an auxiliary winding are wound in opposite winding directions.

4. Transformer according to claim 1, wherein the winding comprises a plurality of wires.

5. High-voltage transformer for a television receiver comprising:

a core;

a coil former surrounding the core,

the coil former having a first chamber with a primary winding and a high-voltage winding located above it, and having a second chamber which is offset axially with respect to the first chamber, and having two parallel-connected auxiliary windings to produce an operating voltage or pulsed voltage,

the first auxiliary winding being located in the first chamber and closely coupled to the primary winding the second auxiliary winding being located in the second chamber lying separately in the region of an air gap of the core and coupled to the high voltage winding, the numbers of turns of the auxiliary windings being determined for providing means for amplitudes of the fundamentals of a flyback pulse produced in the two auxiliary windings being approximately the same magnitude.

6. Transformer according to claim 5, wherein the number of turns of the second auxiliary winding is greater than the number of turns of the first auxiliary winding.

7. Transformer according to claim 5, wherein the number of turns of each auxiliary winding is approximately in the range from 6 to 30.