IP Library › Granted Patent US 12671321
Granted Patent B2
US 12671321 · App. 18/753,893 · Granted Jun 30, 2026

Voltage conversion system including a double-sided direct current-link capacitor system

Inventors: Yilun Luo (Ann Arbor, MI); Chandra S. Namuduri (Troy, MI); Kenneth J. Shoemaker (Highland, MI); Sanjeev M. Naik (Troy, MI); Dongxu Li (Troy, MI); Junghoon Kim (Carlisle, OH)
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
H02M1/44H02G5/02
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Quick Facts
Patent No.
US 12671321
App. No.
18/753,893
Granted
Jun 30, 2026
Kind
B2
Abstract

Voltage conversion systems including double-sided (direct current) DC-link capacitor systems are provided. The voltage conversion system includes a voltage conversion circuit and a double-sided DC-link capacitor system electrically coupled to the voltage conversion circuit. The double-sided DC-link capacitor system includes a busbar system, a first capacitor unit disposed on a first side of the busbar system and electrically coupled to the busbar system, and a second capacitor unit disposed on a second side of the busbar system and electrically coupled to the busbar system. The second side of the busbar system is opposite the first side of the busbar system. A current flow through the busbar system flows to the first capacitor unit in a first current flow direction and to the second capacitor unit in a second current flow direction. The second current flow direction is opposite the first current flow direction.

Claims (46)

1 . A voltage conversion system including a double-sided direct current (DC)-link capacitor system comprises:

a voltage conversion circuit; and

the double-sided DC-link capacitor system electrically coupled to the voltage conversion circuit, the double-sided DC-link capacitor system comprising:

a busbar system;

a first capacitor unit comprising a first set of capacitors disposed on a first side of the busbar system and electrically coupled to the busbar system; and

a second capacitor unit comprising a second set of capacitors disposed on a second side of the busbar system and electrically coupled to the busbar system, wherein:

the second side of the busbar system is opposite the first side of the busbar system,

a first number of capacitors in the first set of capacitors is the same as a second number of capacitors in the second set of capacitors,

the first set of capacitors are arranged in a c-configuration with respect to the voltage conversion circuit on the first side of the busbar system and the second set of capacitors are arranged in the c-configuration with respect to the voltage conversion circuit on the second side of the busbar system, and

a current flow through the busbar system flows to the first capacitor unit in a first current flow direction and to the second capacitor unit in a second current flow direction, the second current flow direction being opposite the first current flow direction.

2 . The voltage conversion system of claim 1 , wherein the first capacitor unit and second capacitor unit are aligned on either side of the busbar system.

3 . The voltage conversion system of claim 1 , wherein the first capacitor unit has a first capacitance value, the second capacitor unit has a second capacitance value, and the first capacitance value is equal to the second capacitance value.

4 . The voltage conversion system of claim 1 , wherein the voltage conversion circuit is one of an alternating current (AC) to DC conversion circuit, a DC to AC conversion circuit, an AC to AC conversion circuit and a DC to DC conversion circuit.

5 . The voltage conversion system of claim 1 , wherein the first set of capacitors includes at least one capacitor having a third capacitance value and at least one capacitor having a fourth capacitance value and the second set of capacitors include at least one capacitor having the third capacitance value and at least one capacitor having the fourth capacitance value.

6 . The voltage conversion system of claim 1 , further comprising:

a housing, wherein the voltage conversion circuit and the double-sided DC-link capacitor system are disposed within the housing; and

a composite resin disposed within the housing to mechanically position the double-sided DC-link capacitor system with respect to the voltage conversion circuit within the housing and to electrically insulate the voltage conversion circuit from the double-sided DC-link capacitor system.

7 . A vehicle including a voltage conversion system including a double-sided direct current (DC)-link capacitor system comprising:

a voltage conversion circuit; and

the double-sided DC-link capacitor system electrically coupled to the voltage conversion circuit, the double-sided DC-link capacitor system comprising:

a busbar system;

a first capacitor unit comprising a first set of capacitors disposed on a first side of the busbar system and electrically coupled to the busbar system; and

a second capacitor unit comprising a second set of capacitors disposed on a second side of the busbar system and electrically coupled to the busbar system, wherein:

the second side of the busbar system is opposite the first side of the busbar system,

a first number of capacitors in the first set of capacitors is the same as a second number of capacitors in the second set of capacitors,

the first set of capacitors are arranged in a c-configuration with respect to the voltage conversion circuit on the first side of the busbar system and the second set of capacitors are arranged in the c-configuration with respect to the voltage conversion circuit on the second side of the busbar system, and

a current flow through the busbar system flows to the first capacitor unit in a first current flow direction and to the second capacitor unit in a second current flow direction, the second current flow direction being opposite the first current flow direction.

8 . The vehicle of claim 7 , wherein the first capacitor unit and second capacitor unit are aligned on either side of the busbar system.

9 . The vehicle of claim 7 , wherein the first capacitor unit has a first capacitance value, the second capacitor unit has a second capacitance value, and the first capacitance value is equal to the second capacitance value.

10 . The vehicle of claim 7 , wherein the voltage conversion circuit is one of an alternating current (AC) to DC conversion circuit, a DC to AC conversion circuit, an AC to AC conversion circuit and a DC to DC conversion circuit.

11 . A double-sided direct current (DC)-link capacitor system comprising:

a busbar system;

a first capacitor unit comprising a first set of capacitors disposed on a first side of the busbar system and electrically coupled to the busbar system; and

a second capacitor unit comprising a second set of capacitors, disposed on a second side of the busbar system and electrically coupled to the busbar system, wherein:

the second side of the busbar system is opposite the first side of the busbar system,

a first number of capacitors in the first set of capacitors is the same as a second number of capacitors in the second set of capacitors, the first set of capacitors are arranged in a c-configuration with respect to a voltage conversion circuit on the first side of the busbar system and the second set of capacitors are arranged in the c-configuration with respect to the voltage conversion circuit on the second side of the busbar system, and

a current flow through the busbar system flows to the first capacitor unit in a first current flow direction and to the second capacitor unit in a second current flow direction, the second current flow direction being opposite the first current flow direction.

12 . The double-sided DC-link capacitor system of claim 11 , wherein the first capacitor unit and second capacitor unit are aligned on either side of the busbar system.

13 . The double-sided DC-link capacitor system of claim 11 , wherein the first capacitor unit has a first capacitance value, the second capacitor unit has a second capacitance value, and the first capacitance value is equal to the second capacitance value.

14 . The double-sided DC-link capacitor system of claim 11 , wherein the voltage conversion circuit is an alternating current (AC) to DC conversion circuit.

15 . The double-sided DC-link capacitor system of claim 11 , wherein the voltage conversion circuit is a DC to AC conversion circuit.

16 . The double-sided DC-link capacitor system of claim 11 , wherein the voltage conversion circuit is an AC to AC conversion circuit.

17 . The double-sided DC-link capacitor system of claim 11 , wherein the voltage conversion circuit is a DC to DC conversion circuit.

18 . The double-sided DC-link capacitor system of claim 11 , wherein the first set of capacitors includes at least one capacitor having a third capacitance value and at least one capacitor having a fourth capacitance value and the second set of capacitors include at least one capacitor having the third capacitance value and at least one capacitor having the fourth capacitance value.

19 . The double-sided DC-link capacitor system of claim 11 , further comprising a housing, wherein the voltage conversion circuit and the double-sided DC-link capacitor system are disposed within the housing.

20 . The double-sided DC-link capacitor system of claim 19 , further comprising a composite resin disposed within the housing to mechanically position the double-sided DC-link capacitor system with respect to the voltage conversion circuit within the housing and to electrically insulate the voltage conversion circuit from the double-sided DC-link capacitor system.