Power arrangement for preventing circulating loop currents within the arrangement

Patent metadata

Field	Value
Publication number	US-9466980-B2
Application number	US-201013884105-A
Country	US
Kind code	B2
Filing date	Nov 22, 2010
Priority date	Nov 22, 2010
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

Power supply arrangement for distribution of power from a DC power source having a positive terminal and a negative terminal to at least a first and a second DC power consumer, comprising: a first DC power consumer connected to the negative terminal of the DC power source, a first DC-DC switching power converter connected to the first DC power consumer, and connected to the positive terminal of said DC power source, a second DC power consumer connected to the negative terminal of the DC power source, a second DC-DC switching power converter connected to the second DC power consumer, and connected to the positive terminal of said DC power source, wherein a unit comprising a capacitor connected in parallel with an electrical device is arranged in each of the first and second return lines, wherein said electrical device has a diode function, whereby circulating ground loop currents are prevented.

First claim

The invention claimed is:

1. Power supply arrangement for distribution of power from a DC power source having a positive terminal and a negative terminal to at least a first and a second DC power consumer, comprising:
a first DC power consumer connected to said negative terminal of said DC power source by means of at least a first return line;
a first DC-DC switching power converter connected to said first DC power consumer, and connected to said positive terminal of said DC power source;
a second DC power consumer connected to said negative terminal of said DC power source by means of at least a second return line;
a second DC-DC switching power converter connected to said second DC power consumer, and connected to said positive terminal of said DC power source,
wherein:
a first unit comprising a first capacitor connected in parallel with a first electrical device is arranged in said first return line;
said first electrical device has a diode function, and a second unit comprising a second capacitor connected in parallel with a second electrical device is arranged in said second return line; and
said second electrical device has a diode function.

2. A power supply arrangement according to claim 1 , wherein at least one of said first and second electrical devices is a diode.

3. A power supply arrangement according to claim 1 , wherein at least one of said electrical devices is a bipolar transistor.

4. A power supply arrangement according to claim 1 , wherein said first and second electrical devices connected in parallel are configured to (a) stabilize and determine the potential of said first and second units, and (b) prevent charge build-up at said parallel connected first and second capacitors.

5. A power supply arrangement according to claim 1 , wherein said first and second capacitors connected in parallel are configured to block circulating loop currents within said distributing power supply arrangement.

6. A power supply arrangement according to claim 1 , wherein the switching frequency of said first and second DC-DC switching power converters is in the MHz-region.

7. A power supply arrangement according to claim 1 , wherein the capacitance value of said first and second capacitors are configured to allow current of the switching frequency of said first and second DC-DC switching power converters to pass while not allowing currents of frequency lower than the switching frequency of said first and second DC-DC switching power converts to pass.

8. A power supply arrangement according to claim 1 , wherein at least one of said first and second DC-DC switching power converters is of non-isolated type.

9. A vehicle comprising the power supply arrangement according to claim 1 .

Assignees

• Nettelblad Bo
• Dermark Daniel
• Saab Ab

Inventors

• Nettelblad Bo
• Dermark Daniel

Classifications

• H02J1/06

  Two-wire DC power distribution systems · CPC title

• H02M1/44

  Circuits or arrangements for compensating for electromagnetic interference in converters or inverters · CPC title

• H02J1/08 Primary

  Three-wire DC power distribution systems; Systems having more than three wires · CPC title

• Y10T307/707

  Cross-Sectional Technologies · mapped topic

• H02J1/00 Primary

  Circuit arrangements for DC mains or DC distribution networks · CPC title