Interleaved soft switching boost converter

Patent metadata

Field	Value
Publication number	US-9729054-B2
Application number	US-201414574505-A
Country	US
Kind code	B2
Filing date	Dec 18, 2014
Priority date	Dec 20, 2013
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

An interleaved double boost converter including two simple boost converters each having a diode, an input inductor, a switch connected to the anode of the diode and a filter capacitor connected to the cathode of the diode, the two switches and the two filter capacitors being connected at a mid-point, the interleaved double boost converter further including a control circuit controlling the switches adapted to control: at a first phase, the opening of a first switch the other remaining closed, both switches initially being closed; at a second phase, the opening of the second switch which had remained closed; and at a third phase, the closing of both switches.

First claim

What is claimed is:

1. An interleaved double boost converter, comprising:
two simple converters each comprising a diode comprising a cathode and an anode, an input inductor, a switch connected to the anode of the diode, and a filter capacitor connected to the cathode of the diode, the two switches and the two filter capacitors being connected at a mid-point; and
a control circuit for the two switches, wherein the control circuit is configured to control:
at a first phase, the opening of one switch of the two switches while the other switch of the two switches remaining closed, both of the two switches initially being closed;
at a second phase, the opening of the other switch which had remained closed; and
at a third phase, the closing of both of the two switches.

2. The interleaved double boost converter according to claim 1 , further comprising a current sensor configured to measure a current circulating in the input inductors, and to feed the measured current values to the control circuit.

3. The interleaved double boost converter according to claim 1 , wherein the cathodes of the diodes are connected to a load, and the control circuit is further configured to regulate a voltage at terminals of the load, and to incorporate a state machine based on the voltage at the terminals of the load, and an inductor current.

4. The interleaved double boost converter according to claim 1 , wherein the cathodes of the diodes are connected to a load, and the control circuit is further configured to trigger the opening of the one switch when an inductor current moves above a first threshold value fixed by a voltage regulation circuit at terminals of the load.

5. The interleaved double boost converter according to claim 4 , wherein the control circuit is further configured to trigger the opening of the other switch when the inductor current drops below a second threshold value.

6. The interleaved double boost converter according to claim 5 , wherein the cathodes of the diodes are connected to a load, the second threshold value being fixed as a function of a load value.

7. The interleaved double boost converter according to claim 5 , wherein the closing of the two switches is simultaneous.

8. The interleaved double boost converter according to claim 7 , wherein the control circuit is further configured to control a simultaneous closing of the two switches when an inductor current drops below a negative third threshold value.

9. The interleaved double boost converter according to claim 8 , wherein the third threshold value being fixed as a function of a load value.

10. An interleaved double boost converter, comprising:
two simple converters each comprising a diode comprising a cathode and an anode, an input inductor, a switch connected to the anode of the diode, and a filter capacitor connected to the cathode of the diode, the two switches and the two filter capacitors being connected at a mid-point;
a control circuit for the two switches, wherein the control circuit is configured to control:
at a first phase, the opening of one switch of the two switches while the other switch of the two switches remaining closed, both of the two switches initially being closed;
at a second phase, the opening of the other switch which had remained closed; and
at a third phase, the closing of both of the two switches; and

a snubber capacitor placed in parallel with each of the two switches.

11. An X-ray generator, comprising:
an interleaved double boost converter for a high voltage powering of the X-ray generator, wherein the interleaved double boost converter comprises:
two simple converters each comprising a diode comprising an anode and a cathode, an input inductor, a switch connected to the anode of the diode, and a filter capacitor connected to the cathode of the diode, the two switches and the two filter capacitors being connected at a mid-point; and
a control circuit for the two switches, wherein the control circuit is configured to control:
at a first phase, the opening of one switch of the two switches while the other switch of the two switches remaining closed, both of the two switches initially being closed;
at a second phase, the opening of the other switch which had remained closed; and
at a third phase, the closing of both of the two switches.

12. The X-ray generator according to claim 11 , further comprising a snubber capacitor placed in parallel with each of the two switches.

Assignees

• Gen Electric

Inventors

• Ernest Philippe
• Louvrier Yannick

Classifications

• H02M3/158 Primary

  including plural semiconductor devices as final control devices for a single load · CPC title

• H02M2003/1586

  Electricity · mapped topic

• H05G1/32

  Supply voltage of the X-ray apparatus or tube · CPC title

• H02M3/1584 Primary

  with a plurality of power processing stages connected in parallel · CPC title

• H02M3/1586

  switched with a phase shift, i.e. interleaved · CPC title