High voltage transformer comprising a coil bobbin for carrying a high voltage winding

Patent metadata

Field	Value
Publication number	US-10090097-B2
Application number	US-201415105603-A
Country	US
Kind code	B2
Filing date	Dec 11, 2014
Priority date	Dec 19, 2013
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

A high voltage transformer ( 50 ) includes a magnetic core ( 5 ); a low voltage winding ( 10 ); a high voltage winding ( 20 ); at least one inner sleeve ( 30 ); and a coil bobbin ( 24 ) for carrying the high voltage winding ( 20 ). The coil bobbin ( 24 ) is configured to be arranged inside the at least one inner sleeve ( 30 ) and configured to be attached to the at least one inner sleeve ( 30 ) at an outer perimeter of the at least one inner sleeve ( 30 ). The coil bobbin ( 24 ) includes at least one field-control electrode ( 22 ), which is adapted to shape an electric field generated by the high voltage winding ( 20 ).

First claim

The invention claimed is:

1. A high voltage transformer comprising:
a magnetic core;
a low voltage winding;
a high voltage winding;
an inner closed sleeve defining a first closed volume;
an outer closed sleeve defining a second closed volume and enclosing the inner closed sleeve in the second closed volume;
a coil bobbin carrying the high voltage winding, the coil bobbin being arranged inside the inner closed sleeve in the first closed chamber and attached to the inner closed sleeve at an outer perimeter of the inner closed sleeve; and
wherein the coil bobbin comprises at least one field-control electrode, which is adapted to shape an electric field generated by the high voltage winding.

2. The high voltage transformer according to claim 1 , further including:
a flange configured to attach the coil bobbin in a spaced relationship to the inner closed sleeve.

3. The high voltage transformer according to claim 1 , further including:
at least two insulating spring washers mounted between the low voltage winding or the core and the outer sleeve to maintain a spaced relationship between the outer sleeve and the low voltage winding to maintain spacing between the low voltage winding and the high voltage winding.

4. The high voltage transformer according to claim 3 , further including:
a flange connected to an outer perimeter of the inner closed sleeve for retaining the high voltage winding inside the inner closed sleeve.

5. The high voltage transformer according to claim 1 , wherein the at least one field-control electrode is arranged on faces of the coil bobbin.

6. The high voltage transformer according to claim 5 , including:
attachments mounting the inner closed sleeve in a spaced relationship inside the outer closed sleeve.

7. The high voltage transformer according to claim 1 , further including:
at least one insulating high voltage wire pipe.

8. A coil bobbin assembly for a high voltage transformer comprising:
a first closed sleeve defining a first interior volume; and
a coil bobbin mounted in the first interior volume by being attached to the first closed sleeve at an outer perimeter of the first closed sleeve.

9. The coil bobbin assembly according to claim 8 , further including:
at least one field-control electrode, configured to shape an electric field generated by the high voltage winding.

10. The coil bobbin according to claim 8 , further including:
a second closed sleeve defining a second interior volume, an outer periphery of the first closed sleeve being attached to the second closed sleeve to mount the first closed sleeve inside the second interior volume in a spaced relationship to the second closed sleeve.

11. An X-ray system, comprising an X-ray tube and the high voltage transformer according to claim 1 .

12. A high voltage test system comprising a high voltage transformer according to claim 1 .

13. A high voltage transformer comprising:
a magnetic core;
a low voltage winding disposed around a portion of the magnetic core;
an outer tubular closed sleeve disposed around the low voltage winding, the outer tubular closed sleeve defining an outer annular interior volume;
an inner tubular closed sleeve disposed inside the outer annular interior volume of the outer tubular closed sleeve, the inner tubular closed sleeve defining an inner annular interior volume;
attachments attaching an outer periphery to the outer tubular closed sleeve in a spaced relationship the inner closed sleeve;
a coil bobbin disposed in the inner annular interior volume, the bobbin including a flange connected to an outer perimeter of the inner tubular closed sleeve to support the coil bobbin in the inner annular interior volume;
a high voltage winding carried by the coil bobbin; and
at least one field control electrode carried by the coil bobbin and configured to shape an electric field generated by the high voltage winding.

Assignees

• Koninklijke Philips Nv

Inventors

• Ackermann Bernd
• Efftinge Wolfgang
• Garcia Tormo Albert
• Hattrup Christian
• Kröger Ralf
• Scheel Thomas
• LÜRKENS Peter
• Wismans Antonius Johannes Joseph

Classifications

• H05G1/10

  Power supply arrangements for feeding the X-ray tube {(supply circuits with converters in general H02M; supply circuits for emitters and amplifiers H04B1/16 - H04B1/1623)} · CPC title

• H01F27/28

  Coils; Windings; Conductive connections · CPC title

• H01F27/323 Primary

  Insulation between winding turns, between winding layers · CPC title

• H01F27/2885 Primary

  with shields or electrodes (shields or electrodes for pancake coils H01F27/2871; construction of electric or magnetic shields or screens H01F27/36) · CPC title

• H01F27/325

  Coil bobbins (formers for coils in general H01F5/02) · CPC title