Power supply unit

Patent metadata

Field	Value
Publication number	US-10714970-B2
Application number	US-201314374766-A
Country	US
Kind code	B2
Filing date	Jan 15, 2013
Priority date	Feb 6, 2012
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

A power supply unit having a circuit for uninterrupted power supply comprises a first DC-DC converter arranged on the input side, at least one output configured for outputting an output DC voltage, and at least one first output switching controller. A DC link is arranged between the first DC-DC converter and the at least one output switching controller for regulating the at least one output DC voltage on the output side. The first DC link is connected to an energy storage module.

First claim

The invention claimed is:

1. A power supply unit having a circuit for uninterrupted power supply, comprising:
a DC-DC converter connected to an input side of the power supply unit;
at least one output via which a DC voltage is output;
at least one first output switching controller operatively coupled to an output of the DC-DC converter, said at least one first output switching controller regulating the output DC voltage;
a DC link having a variable voltage level and operatively coupled between the DC-DC converter and the at least one first output switching controller; and
an energy storage module operatively coupled directly to the DC link, said energy storage module comprising an accumulator which is connected to the DC link via a charging unit;
wherein the at least one output switching controller has a lower operating voltage limit, which is lower than a discharge voltage of the energy storage module.

2. The power supply unit of claim 1 , wherein the at least one output switching controller is configured as a step-down switching controller.

3. The power supply unit of claim 1 , wherein the energy storage module is arranged in a separate housing and is connectable to the DC link via plug-in contacts.

4. The power supply unit of claim 1 , wherein the DC-DC converter is connected to a supply voltage on the input side of the power supply unit via a power factor correction (PFC) circuit.

5. The power supply unit of claim 1 , wherein the energy storage module comprises a capacitor.

6. The power supply unit of claim 5 , wherein the capacitor is connected to the DC link via a charging resistor.

7. The power supply unit of claim 6 , further comprising:
a switch element arranged in parallel with the charging resistor.

8. The power supply unit of claim 1 , further comprising:
at least two second output switching controllers connected on the output side;
wherein the accumulator is connected to the DC link via one of the at least two second output switching controllers that is adapted as a charging circuit.

9. The power supply unit of claim 8 , wherein the accumulator is additionally connected to the DC link via a decoupling element.

10. The power supply unit of claim 1 , wherein one of the charging circuit and the energy storage module is connected to a control unit of the power supply unit via an additional connection to determine a charge status of the accumulator.

11. The power supply unit of claim 1 , wherein a further DC link is provided in parallel with the DC link and is supplied via a further DC-DC converter.

12. The power supply unit of claim 11 , wherein the DC link and the further DC links are each connected to a respective energy storage module.

13. The power supply unit of claim 11 , wherein a shared energy storage module is connected to the DC link and the further DC link via a respective switch unit.

14. The power supply unit as claimed in claim 13 , wherein the respective switch unit comprises a diode.

15. The power supply unit as claimed in claim 13 , wherein a protection device is provided in series with at least one switch unit.

16. A method for operating a power supply unit of claim 1 , comprising:
charging the energy storage module with energy via the DC link; and
discharging the energy into the DC link as required.

Assignees

• Siemens Ag

Inventors

• Augesky Christian
• Schweigert Harald

Classifications

• H02J7/00

  Circuit arrangements for charging or discharging batteries or for supplying loads from batteries · CPC title

• H02J9/061 Primary

  for DC powered loads · CPC title

• H02M3/04

  by static converters · CPC title

• H02J7/345

  using capacitors as storage or buffering devices · CPC title

• Y10T307/344

  Cross-Sectional Technologies · mapped topic