High voltage transformer

• US 5,847,947 A
• Filed: 01/29/1998
• Issued: 12/08/1998
• Est. Priority Date: 01/29/1998
• Status: Expired due to Fees

• Current Assignee: Transpacific IP Group Limited
• Original Assignee: Industrial Technology Research Institute
• Inventors: Yang, Hui Pin, Pan, Tsung-Ming, Lin, Jang-Tzeng
• Primary Examiner(s): BERHANE, ADOLF D
• Application Number:
  US09/015,321
• Time in Patent Office: 313 Days
• Field of Search: 363/60, 363/59, 363/61, 336/175, 336/185, 336/83, 336/212, 336/218, 336/232, 336/233, 336/200
• US Class Current: 363/61
• CPC Class Codes: H01F 27/2804 Printed windings

Abstract

The structure of a high voltage transformer is disclosed. The transformer structure has a magnetic core, a multi-layer printed circuit board (PCB), a conductor winding, a voltage doubling rectifier means, a magnetic means, a supporting means, and insulated oil. The multi-layer PCB has spiral coils used as a secondary winding. A conductor windings is used as a primary winding. The voltage doubling rectifier means includes an anode voltage doubling rectifier circuit and a cathode voltage doubling rectifier circuit which are respectively formed on a first and a second insulated boards. The two voltage doubling rectifier is used to increase the voltage gain. The magnetic means has a top magnetic cap and a bottom magnetic cap. The mullet-layer PCB and the voltage doubling rectifier means are interposed between the top and the bottom magnetic cap for decreasing the leakage magnetic flux. The breakdown distance can be maintained in an appropriate distance by using the supporting means. The insulated oil serving as an insulated material is filled into the transformer structure to increase the durability of breakdown voltage.

Claims

1. A transformer comprising:

a magnetic core for served as the medium of transferring power;

a multi-layer printed circuit board having spiral planar coils inside, said spiral planar coils being used as a secondary winding, said secondary winding are spiraled around said magnetic core;

a conductor winding using as a primary winding, said primary winding spiraled around said magnetic core;

a voltage doubling rectifier means for increasing voltage gain, said voltage doubling rectifier means comprising of an anode voltage doubling rectifier circuit and a cathode voltage doubling rectifier circuit which are respectively formed on a first and a second insulated boards, said multi-layer printed circuit board being sandwiched between said anode voltage doubling rectifier circuit and said cathode voltage doubling rectifier circuit;

a magnetic means for decreasing magnetic flux, said magnetic means comprising a top magnetic cap and a bottom magnetic cap, said multi-layer printed circuit board and said voltage doubling rectifier means being sandwiched between said top magnetic cap and said bottom magnetic cap;

a supporting means for fixing said multi-layer printed circuit board, said voltage doubling rectifier means and said magnetic means; and

an amount of insulated oil which is filled into said transformer for increasing breakdown voltage.

2. The transformer of claim 1, wherein said magnetic core comprises a plurality of I-cores, the appearance of said core being close rectangle frame.

3. The transformer of claim 1, wherein said magnetic core comprises two U-cores, the appearance of said core being close rectangle frame.

4. The transformer of claim 1, wherein said top magnetic cap comprises a plurality of first fixed-holes and a first opening, said supporting means mounting into said plurality of first fixed-holes to fix said top magnetic cap, and said magnetic core passing through said first opening.

5. The transformer of claim 1, wherein said first insulated board on which said anode voltage doubling rectifier circuit is formed, comprises a plurality of second fixed-holes and a second opening, said supporting means mounting into said plurality of second fixed-holes to fix said anode voltage doubling rectifier circuit, and said magnetic core passing through said second opening.

6. The transformer of claim 1, wherein said printed circuit board comprises a plurality of third fixed-holes and a third opening, said supporting means mounting into said plurality of third fixed-holes to fix said printed circuit board, and said magnetic core passing through said third opening.

7. The transformer of claim 1, wherein said second insulated board on which said cathode voltage doubling rectifier circuit is formed comprises a plurality of forth fixed-holes and a forth opening, said supporting means mounting into said plurality of forth fixed-holes to fix said cathode voltage doubling rectifier circuit, and said magnetic core passing through said forth opening.

8. The transformer of claim 1, wherein said bottom magnetic cap comprises a plurality of fifth fixed-holes and a fifth opening, said supporting means mounting into said plurality of fifth fixed-holes to fix said bottom magnetic cap, and said magnetic core passing through said fifth opening.

9. The transformer of claim 1, wherein when a voltage condition is provided about 150 KV, the breakdown distance of said transformer comprising:

the breakdown distance between said core and said multi-layer printed circuit board being about 10 mm;

the breakdown distance between said voltage doubling rectifier means and said multi-layer printed circuit board being 15 mm; and

the breakdown distance between said magnetic means and said voltage doubling rectifier means being about 40 mm.

10. The transformer of claim 1, wherein said supporting means comprises a plurality of supporting rods.