Electronic control for high voltage systems

Patent metadata

Field	Value
Publication number	US-10692684-B2
Application number	US-201615377539-A
Country	US
Kind code	B2
Filing date	Dec 13, 2016
Priority date	Dec 14, 2015
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A circuit assembly includes plural voltage control modules configured to be operably coupled in series to a connection and configured to control voltage delivered to an X-ray electrode. Each voltage module includes an on/off circuit portion, a balancing circuit portion, and a tuning circuit portion. The on/off circuit portion is configured to provide a voltage for activating or deactivating the X-ray electrode. The balancing circuit portion is coupled in parallel to the on/off circuit portion, and includes a capacitor and a resistor coupled in parallel. The tuning circuit portion is coupled in parallel to the balancing circuit portion and the on/off circuit portion, and is configured to adjust a voltage provided to the X-ray electrode.

First claim

What is claimed is:

1. A circuit assembly comprising:
a plurality of voltage control modules coupled to each other in series and configured to control voltage delivered to an X-ray electrode, each voltage module comprising:
an on/off circuit portion configured to provide a voltage for activating or deactivating the X-ray electrode;
a balancing circuit portion coupled in parallel to the on/off circuit portion, the balancing portion comprising a capacitor and a resistor coupled in parallel;
a tuning circuit portion coupled in parallel to the balancing circuit portion and the on/off circuit portion, the tuning circuit portion configured to adjust a voltage provided to the X-ray electrode;
wherein the on/off circuit portion comprises a switching unit having a first switch and a second switch connected in series with an inductor and a capacitor; and
wherein the circuit assembly further includes a controller configured to control the switching unit such that at least one of the first switch or the second switch is always open.

2. The circuit assembly of claim 1 , further comprising at least one transformer coupled via a secondary conductive winding to each tuning circuit portion of each voltage control module.

3. The circuit assembly of claim 1 , wherein the first switch and the second switch are connected in series with each other in an opposite direction.

4. The circuit assembly of claim 1 , wherein the controller is further configured to close the second switch and open the first switch in order to change the voltage delivered to the X-ray electrode from positive to negative.

5. The circuit assembly of claim 1 , wherein the on/off circuit portion includes a passive gate driver and the tuning circuit portion includes an active gate driver.

6. The circuit assembly of claim 2 , further comprising at least one low voltage circuit portion coupled to the at least one transformer via a primary winding, the at least one low voltage circuit portion comprising at least one switching unit configured to control voltage provided to the primary winding.

7. The circuit assembly of claim 2 , wherein the tuning circuit portion comprises a switching unit in series with an inductor, wherein the inductor inductively couples the voltage control module to the at least one transformer.

8. A system comprising:
at least one X-ray electrode;
at least one controller configured to control at least one voltage provided to the at least one X-ray electrode;
a plurality of voltage control modules coupled to each other in series and configured to control the at least one voltage delivered to the at least one X-ray electrode;
wherein each voltage control module comprises:
an on/off circuit portion configured to provide a voltage for activating or deactivating the at least one X-ray electrode;
a balancing circuit portion coupled in parallel to the on/off circuit portion, the balancing portion comprising a capacitor and a resistor coupled in parallel;
a tuning circuit portion coupled in parallel to the balancing circuit portion and the on/off circuit portion, the tuning circuit portion configured to adjust the at least one voltage provided to the at least one X-ray electrode;

wherein the on/off circuit portion comprises a switching unit having a first switch and a second switch connected in series with an inductor and a capacitor; and
wherein the at least one controller is further configured to control the switching unit such that at least one of the first switch or the second switch is always open.

9. The system of claim 8 , further comprising at least one transformer, the at least one transformer coupled via a secondary winding to each tuning circuit portion of each voltage control module.

10. The system of claim 9 , further comprising at least one low voltage circuit portion coupled to the at least one transformer via a primary winding, the at least one low voltage circuit portion comprising at least one switching unit configured to control voltage provided to the primary winding.

11. The system of claim 9 , wherein the tuning circuit portion comprises a switching unit in series with an inductor, wherein the inductor inductively couples the voltage control module to the at least one transformer.

Assignees

• Gen Electric

Inventors

• Caiafa Antonio
• Ernest Philippe
• Poincloux Dominique

Classifications

• H02H9/042 Primary

  comprising means to limit the absorbed power or indicate damaged over-voltage protection device · CPC title

• H05G1/34

  Anode current, heater current or heater voltage of X-ray tube · CPC title

• H02H9/043

  Protection of over-voltage protection device by short-circuiting · CPC title

• H05G1/54

  Protecting {or lifetime prediction}(overload protection combined with control H05G1/46) · CPC title

• H01J35/08 Primary

  Anodes; Anti cathodes · CPC title