Semiconductor module for use in power supply

• US 20100039843A1
• Filed: 08/19/2009
• Published: 02/18/2010
• Est. Priority Date: 02/02/2007
• Status: Active Grant

• Current Assignee: Fuji Electric Company Limited (Fuji Electric Systems Company Limited)
• Original Assignee: Fuji Electric Systems Company Limited
• Inventors: Takizawa, Satoki
• Granted Patent: US 8,300,443 B2
• Time in Patent Office: Days
• US Class Current: 363/131
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H02M 7/487 Neutral point clamped inverters

Abstract

A series connection circuit of IGBTs and an AC switch are contained in one package. The series connection circuit is connected between the positive and negative terminals of a DC power source, and the AC switch is connected between a neutral point of the DC power source and a series connection point between the IGBTs. Straight conductor strips can be used to connect terminals on the package to the DC power source, thereby reducing inductance and thus also reducing voltage spikes.

Claims

1. A three-phase inverter for use with a DC power source having a positive terminal, a negative terminal, and a neutral terminal, comprising:

a power semiconductor module that includes;

a package;

a first IGBT in the package, the first IGBT having a collector and an emitter, the collector of the first IGBT being connected to the positive terminal of the DC power source;

a first diode in the package, the first diode having a cathode that is connected to the collector of the first IGBT and having an anode that is connected to the emitter of the first IGBT;

a second IGBT in the package, the second IGTBT having a collector and an emitter, the emitter of the second IGBT being connected to the negative terminal of the DC power source and the collector of the second IGBT being connected to the emitter of the first IGBT at an intermediate connection point;

a second diode in the package, the second diode having a cathode that is connected to the collector of the second IGBT and having an anode that is connected to the emitter of the second IGBT; and

a semiconductor AC switch in the package, the semiconductor AC switch being connected between the neutral terminal of the DC power source and the intermediate connection point of the first and second IGBTs.

2. The inverter of claim 1, wherein the semiconductor AC switch comprises:

a third IGBT having a collector and an emitter;

a third diode having a cathode that is connected to the collector of the third IGBT and an anode that is connected to the emitter of the third IGBT;

a fourth IGBT having a collector and an emitter, the fourth IGBT being connected to the third IGBT; and

a fourth diode having a cathode that is connected to the collector of the fourth IGBT and anode that is connected to the emitter of the fourth IGBT.

3. The inverter of claim 2, wherein the collector of the third IGBT is connected to the collector of the fourth IGBT, or the emitter of the third IGBT is connected to the emitter of the fourth IGBT.

4. The inverter of claim 1, wherein the semiconductor AC switch comprises a third IGBT having a collector and an emitter, and a fourth IGBT having a collector that is connected to the emitter of the third IGBT and an emitter that is connected to the collector of the third IGBT

5. The inverter of claim 1, further comprising first and second neutral point terminals on the package, the first and second neutral point terminals both being connected to the semiconductor AC switch.

6. The inverter of claim 1, further comprising a positive terminal, a negative terminal, and a neutral point terminal on the package, the positive, negative, and neutral point terminals on the package being arranged along a straight line.

7. The inverter of claim 6, wherein straight conductors connect the positive, negative, and neutral point terminals on the case to the positive, negative, and neutral point terminals of the DC power source.

12. The inverter of claim 5, further comprising first and second neutral point terminals on the package, the first and second neutral point terminals both being connected to the semiconductor AC switches

14. The inverter of claim 6, wherein straight conductors connect the positive, negative, and neutral point terminals on the case to the positive, negative, and neutral point terminals of the DC power source.

8. A three-phase inverter for use with a DC power source having a positive terminal, a negative terminal, and a neutral terminal, comprising:

a power semiconductor module that includes;

a package;

a plurality of one-phase switch circuits in the package, each one-phase switch circuit including;

a first IGBT having a collector and an emitter, the collector of the first IGBT being connected to the positive terminal of the DC power source,

a first diode having a cathode that is connected to the collector of the first IGBT and having an anode that is connected to the emitter of the first IGBT,

a second IGTBT having a collector and an emitter, the emitter of the second IGBT being connected to the negative terminal of the DC power source and the collector of the second IGBT being connected to the emitter of the first IGBT at an intermediate connection point, and

a second diode having a cathode that is connected to the collector of the second IGBT and having an anode that is connected to the emitter of the second IGBT; and

a plurality of semiconductor AC switches in the package, each semiconductor AC switch being connected between the neutral terminal of the DC power source and the intermediate connection point of the first and second IGBTs in a respective one of the one-phase switch circuits.

9. The inverter of claim 8, wherein each semiconductor AC switch comprises:

a third IGBT having a collector and an emitter;

a third diode having a cathode that is connected to the collector of the third IGBT and an anode that is connected to the emitter of the third IGBT;

a fourth IGBT having a collector and an emitter, the fourth IGBT being connected to the third IGBT; and

a fourth diode having a cathode that is connected to the collector of the fourth IGBT and anode that is connected to the emitter of the fourth IGBT.

10. The inverter of claim 9, wherein the collectors of the third and fourth IGBTs of each semiconductor AC switch are connected together, or the emitters of the third and fourth IGBTs of each semiconductor AC switch are connected together.

11. The inverter of claim 8, wherein each semiconductor AC switch comprises a third IGBT having a collector and an emitter, and a fourth IGBT having a collector that is connected to the emitter of the third IGBT and an emitter that is connected to the collector of the third IGBT.

13. The inverter of claim 8, further comprising a positive terminal, a negative terminal, and a neutral point terminal on the package, the positive, negative, and neutral point terminals on the package being arranged along a straight line.

15. A modular power supply component for use with a DC power source having a positive terminal, a negative terminal, and a neutral terminal, comprising:

a package having first, second, and third terminals that are disposed along a straight line;

first and second IGBTs that disposed in the package and that are connected in series between the first and third terminals, the first and second IGBTs being connected to one another at an intermediate connection point; and

a semiconductor AC switch that is disposed in the package and that is connected between the second terminal and the intermediate connection point,

wherein the first terminal is connected to the positive terminal of the DC power source, the second terminal is connected to the neutral terminal of the DC power source, and the third terminal is connected to the negative terminal of the DC power source.

16. The modular power supply component of claim 15, wherein the first terminal is connected to the positive terminal of the DC power source by a first metal strip that is straight, the second terminal is connected to the neutral terminal of the DC power source by a second metal strip that is straight, and the third terminal is connected to the negative terminal of the DC power source by a third metal strip that is straight.

17. The modular power supply component of claim 16, wherein the first metal strip metal strip has a first width and the second metal strip has a width that is substantially greater than the first width.

18. The modular power supply component of claim 15, wherein the semiconductor AC switch is a first semiconductor AC switch, the intermediate connection point is a first intermediate connection point, and further comprising:

third and fourth IGBTs that disposed in the package and that are connected in series between the first and third terminals, the first and second IGBTs being connected to one another at a second intermediate connection point;

a second semiconductor AC switch that is disposed in the package and that is connected between the second terminal and the second intermediate connection point;

fourth and fifth IGBTs that disposed in the package and that are connected in series between the first and third terminals, the first and second IGBTs being connected to one another at a third intermediate connection point;

a third semiconductor AC switch that is disposed in the package and that is connected between the second terminal and the third intermediate connection point; and

fourth, fifth, and sixth terminals that are disposed on the package, the fourth terminal being connected to the first intermediate connection point, the fifth terminal being connected to the second intermediate connection point, and the sixth terminal being connected to the third intermediate connection point, the fourth, fifth, and sixth terminals being connected to a three-phase load.