Wide-voltage-range converter

• US 7,622,825 B2
• Filed: 09/06/2006
• Issued: 11/24/2009
• Est. Priority Date: 09/06/2005
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Brune, Richard, Göpfrich, Kurt
• Primary Examiner(s): Deberadinis; Robert L.
• Application Number:
  US11/470,409
• Publication Number:
  US 20080179951A1
• Time in Patent Office: 1,175 Days
• Field of Search: 307/82
• US Class Current: 307/82
• CPC Class Codes: H02M 5/225 comprising two stages of AC-AC conversion, e.g. having a high frequency intermediate link
• CPC Class Codes: H02M 5/4585 having a rectifier with controlled elements

Abstract

A wide voltage converter includes a power-supply-side converter unit, n load-side converter units, and a step-up/step-down converter device having n transformers. The step-up/step-down converter device electrically connects the power-supply-side converter unit to the n load-side converter units. The wide-voltage-range converter is capable of operating without derating with n specified output voltages, which can be predetermined independent from one another, and reliably inhibits restart.

Claims

1. A wide-voltage-range converter, comprising

a power-supply-side converter unit having a DC output side,

n load-side converter units each having a DC input side, and

an n-channel step-up/step-down converter device having n transformers,

wherein the n-channel step-up/step-down converter device electrically connects the DC output side of the power-supply-side converter unit to respective DC input sides of the n load-side converter units,

wherein a power supply side of the n-channel step-up/step-down converter device comprises a half-bridge circuit having two turn-off semiconductor switches, two capacitors electrically connected in series, with the series connection electrically connected in parallel with the half-bridge circuit,

wherein a load side of the n-channel step-up/step-down converter device comprises n half-bridge circuits each having two turn-off semiconductor switches and two capacitors electrically connected in series, with the series-connection connected in parallel with a corresponding one of the half-bridge circuits,

wherein a first terminal of a primary winding of each of the n transformers is connected to a corresponding terminal of the two turn-off semiconductor switches of the half-bridge circuit on the power supply side and a second terminal of the primary winding of each of the n transformers is connected to a terminal connecting the two capacitors on the power supply side, and

wherein a first terminal of a secondary winding of each of the n transformers is connected to a corresponding terminal of the two turn-off semiconductor switches of the half-bridge on the load side and a second terminal of the secondary winding of each of the n transformers is connected to a corresponding terminal connecting the two capacitors on the load side.

2. The wide-voltage-range converter of claim 1, wherein each of the half-bridge circuits comprises a corresponding drive device with an output side having control outputs, with each control output connected to a corresponding control input of the two turn-off semiconductor switches of the half-bridge circuits on the power supply side and load side, respectively.

3. The wide-voltage-range converter of claim 1 wherein the power-supply-side converter unit comprises a regenerative converter unit.

4. The wide-voltage-range converter of claim 3, wherein the power-supply-side converter unit has an AC voltage side receiving a plurality of phases and a filter on the AC voltage side, and wherein each phase of the power-supply-side converter unit comprises as a converter unit valve a turn-off semiconductor switch with an antiparallel-connected diode.

5. The wide-voltage-range converter of claim 4, wherein the power-supply-side filter comprises three capacitors connected in a star configuration.

6. The wide-voltage-range converter of claim 5, wherein a damping resistor is electrically connected in series with each capacitor of the power-supply-side filter.

7. The wide-voltage-range converter of claim 4, wherein the power-supply-side filter comprises three capacitors connected in a delta configuration.

8. The wide-voltage-range converter of claim 3, wherein the power-supply-side converter unit has an AC voltage side receiving a plurality of phases and a filter on the AC voltage side, and wherein each phase of the power-supply-side converter unit comprises as a converter unit valve a bidirectional switch and a turn-off semiconductor switch.

9. The wide-voltage-range converter of claim 8, wherein the power-supply-side filter comprises three capacitors connected in a star configuration.

10. The wide-voltage-range converter of claim 9, wherein a damping resistor is electrically connected in series with each capacitor of the power-supply-side filter.

11. The wide-voltage-range converter of claim 8, wherein the power-supply-side filter comprises three capacitors connected in a delta configuration.

12. The wide-voltage-range converter of claim 3, wherein the power-supply-side converter unit has an AC voltage side with input terminals for different phases, with each input terminal connected to an inductor, and wherein each phase of the power-supply-side converter unit comprises a bidirectional switch and a turn-off semiconductor switch.

13. The wide-voltage-range converter of claim 1, wherein each primary winding of the n transformers forms a corresponding connection device.

14. The wide-voltage-range converter of claim 1, wherein the converter unit valves of the step-up/step-down converter device comprise MOS field effect transistor.

15. The wide-voltage-range converter claim 14, wherein the field effect transistor is made of silicon carbide.

16. The wide-voltage-range converter of claim 1, wherein the converter unit valves of the step-up/step-down converter device comprise a junction field effect transistor.

17. The wide-voltage-range converter claim 16, wherein the field effect transistor is made of silicon carbide.

18. The wide-voltage-range converter of claim 1, wherein the converter unit valves of the step-up/step-down converter device comprise an insulated gate bipolar transistor with antiparallel diode made of silicon carbide.

19. The wide-voltage-range converter of claim 1, wherein the capacitors on the power supply side of the n-channel step-up/step-down converter device each comprise a film capacitor.

20. The wide-voltage-range converter of claim 1 wherein the n transformers comprise corresponding magnetic cores configured for mechanical separation.