Transformer network

Patent metadata

Field	Value
Publication number	US-9072155-B2
Application number	US-201313863148-A
Country	US
Kind code	B2
Filing date	Apr 15, 2013
Priority date	Jun 22, 2012
Publication date	Jun 30, 2015
Grant date	Jun 30, 2015

Abstract

A transformer network circuit utilizing multiple smaller transformer cores, instead of a single, relatively larger core, for transferring electrical power while maintaining a smaller overall core mass.

First claim

What is claimed is:

1. A transformer network, comprising:
a. an LC switching circuit including a center connection, a top connection, and a bottom connection;
b. primary windings comprising top primary windings and bottom primary windings;
c. the center connection electrically connected to a first end of the top primary windings and to a first end of the bottom primary windings, the top primary windings wrapped in a first direction around a first transformer core, the bottom primary windings wrapped in a second direction around the first transformer core, the first direction is opposite to the second direction;
d. the top primary windings wrapped in the first direction around at least one additional transformer core then a second end of the top primary windings electrically connected to the top connection;
e. the bottom primary windings wrapped in the second direction around the at least one additional transformer core then a second end of the bottom primary windings electrically connected to the bottom connection;
f. secondary windings having a first end and a second end, the secondary windings wrapped around at least one of the first transformer core and the at least one additional transformer core; and
g. the first end and the second end of the secondary windings configured to be electrically connected across a load.

2. The network of claim 1 , wherein at least one of the first transformer core and the at least one additional transformer core is free of secondary windings.

3. The network of claim 1 , wherein the LC switching circuit comprises:
a. a direct current source electrically connected to a common connection at one end and to a first connection of an inductor at an opposing end;
b. a second connection of the inductor electrically connected to the center connection;
c. a capacitor having a first end electrically connected to the top connection, and at an opposing end, a second end electrically connected to the bottom connection;
d. the capacitor electrically connected in parallel with the primary windings;
e. a first electronic switch electrically connected to the common connection at one end and to the top connection at an opposing end; and
f. a second electronic switch electrically connected to the common connection at one end and to the bottom connection at an opposing end.

4. The network of claim 1 , wherein the secondary windings are wound on the first transformer core and a turn ratio of the primary windings to secondary windings on the first transformer core is greater than 1:10.

5. The network of claim 1 , wherein the secondary windings are wound on at least one of the at least one additional transformer core and a turn ratio of the primary windings to secondary windings on at least one of the at least one additional transformer core is greater than 1:10.

6. The network of claim 1 , wherein the secondary windings are wound on all of the at least one additional transformer core and a turn ratio of the primary windings to secondary windings on all of the at least one additional transformer core is greater than 1:10.

7. The network of claim 1 , wherein a peak voltage of the secondary windings is at least 100 volts higher than a peak voltage of the primary windings.

8. The network of claim 1 , further comprising the load and the secondary windings are electrically connected across the load.

9. The network of claim 8 , wherein further comprising a high voltage multiplier circuit and wherein the load is a high voltage multiplier circuit.

10. The network of claim 9 , wherein the high voltage multiplier circuit is configured to provide at least 1000 volts between an anode and a cathode of an x-ray tube.

11. The network of claim 10 , further comprising the x-ray tube, the high voltage multiplier circuit is electrically connected to the cathode, and the anode is electrically connected to ground.

12. The network of claim 1 , wherein the secondary windings are wrapped in series.

13. The network of claim 1 , wherein the secondary windings are wrapped in parallel.

14. The network of claim 1 , wherein the secondary windings are all wrapped in a single direction on all transformer cores.

15. The network of claim 1 , wherein the at least one additional transformer core includes at least two additional transformer cores.

16. The network of claim 1 , wherein the at least one additional transformer core includes at least three additional transformer cores.

17. A transformer network, comprising:
a. an LC switching circuit including a center connection, a top connection, and a bottom connection, the LC switching circuit comprising:
i. a direct current source electrically connected to a common connection at one end and to a first connection of an inductor at an opposing end;
ii. a second connection of the inductor electrically connected to the center connection;
iii. a capacitor having a first end electrically connected to the top connection, and at an opposing end, a second end electrically connected to the bottom connection;
iv. the capacitor electrically connected in parallel with the primary windings;
v. a first electronic switch electrically connected to the common connection at one end and to the top connection at an opposing end; and
vi. a second electronic switch electrically connected to the common connection at one end and to the bottom connection at an opposing end;

b. primary windings comprising top primary windings and bottom primary windings;
c. the center connection electrically connected to a first end of the top primary windings and to a first end of the bottom primary windings, the top primary windings wrapped in a first direction around a first transformer core, the bottom primary windings wrapped in a second direction around the first transformer core, the first direction is opposite to the second direction;
d. the top primary windings wrapped around at least two additional transformer cores then a second end of the top primary windings electrically connected to the top connection;
e. the bottom primary windings wrapped around the at least two additional transformer cores then a second end of the bottom primary windings electrically connected to the bottom connection;
f. secondary windings having a first end and a second end, the secondary windings wrapped in a single direction around at least one of the first transformer core and the at least two additional transformer cores;
g. at least one of the first transformer core and the at least two additional transformer cores is free of secondary windings; and
h. the first end and the second end of the secondary windings configured to be electrically connected across a load.

18. A transformer network, comprising:
a. an LC switching circuit including a center connection, a top connection, and a bottom connection, the LC switching circuit comprising:
i. a direct current source electrically connected to a common connection at one end and to a first connection of an inductor at an opposing end;
ii. a second connection of the inductor electrically connected to the center connection;
iii. a capacitor having a first end electrically connected to the top connection, and at an opposing end, a second end electrically connected to the bottom connection;
iv. the capacitor electrically connected in parallel with the primary windings;
v. a first electronic switch electrically connected to the common connection at one end and to the top connection at an opposing end; and
vi. a second electronic switch electrically connected to the common connection at one end and to the bot

Assignees

• Moxtek Inc

Inventors

• Wang Dongbing

Classifications

• H01F27/38

  Auxiliary core members; Auxiliary coils or windings · CPC title

• H05G1/12

  with DC or rectified single-phase AC {or double-phase} · CPC title

• H05G1/10 Primary

  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

• H02M7/5381

  Parallel type · CPC title