Single module electric power conversion apparatus

• US 6,888,729 B2
• Filed: 04/04/2002
• Issued: 05/03/2005
• Est. Priority Date: 10/12/2001
• Status: Expired due to Term

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Maekawa, Hirotoshi, Matsuoka, Syougo
• Primary Examiner(s): Vu, Bao Q.
• Application Number:
  US10/115,105
• Publication Number:
  US 20030072117A1
• Time in Patent Office: 1,125 Days
• Field of Search: 363/56.02, 363/56.03, 363/56.04, 363/56.05, 363/98, 363/132, 363/50, 363/55, 363/147
• US Class Current: 363/56.02
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• 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 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/13055 Insulated gate bipolar transistor [IGBT]
• CPC Class Codes: H01L 2924/13091 Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
• CPC Class Codes: H01L 2924/181 Encapsulation
• CPC Class Codes: H02M 1/08 Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• CPC Class Codes: H02M 1/32 Means for protecting converters other than automatic disconnection
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H05K 7/1432 specially adapted for power drive units or power converters
• CPC Class Codes: H05K 7/14322 wherein the control and power circuits of a power converter are arranged within the same casing
• CPC Class Codes: H05K 9/002 with localised screening

Abstract

To perform a miniaturization and weight reduction of an electric power conversion apparatus, and in extension, the miniaturization of an inverter apparatus itself. In the inverter apparatus which converts a DC voltage into an AC voltage, a semiconductor device for electric power conversion, and a drive and protection circuit which drives and protects this semiconductor device for electric power conversion, and a power supply circuit which supplies power to this drive and protection circuit are integrated in the same module.

Claims

1. In an inverter apparatus for converting a DC voltage into an AC voltage,

an electric power conversion apparatus, wherein a semiconductor device for electric power conversion, a drive and protection means for driving and protecting the semiconductor device, and a power circuit supplying electric power to the drive and protection means are integrated in one module,

wherein said drive and protection means and said power circuit are mixedly mounted on both sides of a board, and a metal shielding plate is arranged between the board and the semiconductor device.

2. The electric power conversion apparatus according to claim 1, wherein said board on which said drive and protection means and said power circuit are mixedly mounted is a multilayer board, and heat generated in an inner layer pattern of the board is radiated through the metal shielding plate to a base plate connected to an external cooler.

3. The electric power conversion apparatus according to claim 2, wherein a low profile type sheet transformer made by combining ferrite core material and a multilayer board is used as a switching transformer in said power circuit.

4. In an inverter apparatus for converting a DC voltage into an AC voltage,

an electric power conversion apparatus, wherein a semiconductor device for electric power conversion, a drive and protection means for driving and protecting the semiconductor device, and a power circuit supplying electric power to the drive and protection means are integrated in one module,

wherein said drive and protection means comprises:

a diode device incorporated in the semiconductor device;

a constant current circuit which provides a constant current to the diode device;

a waveform shaping circuit which shapes a waveform of a voltage between ends of the diode device; and

a microcomputer which fetches a voltage between ends of the diode device whose waveform is shaped, and

wherein the semiconductor device is shut off on the basis of the voltage between ends of the diode device and overheat determination temperature data stored beforehand.

5. The electric power conversion apparatus according to claim 4, wherein the microcomputer includes means for correcting a temperature map at the time of product shipment and storing the overheat determination temperature data beforehand, and interpolation means for performing interpolation on the basis of the overheat determination temperature data and a detection output of a temperature detecting element on said board during normal operation.

10. The electric power conversion apparatus according to claim 4, wherein said drive and protection means suppresses di/dt of the semiconductor device when the semiconductor device is shut off.

6. In an inverter apparatus for converting a DC voltage into an AC voltage,

an electric power conversion apparatus, wherein a semiconductor device for electric power conversion, a drive and protection means for driving and protecting the semiconductor device, and a power circuit supplying electric power to the drive and protection means are integrated in one module,

wherein said drive and protection means comprises:

a sensing terminal which senses a shunt current of the semiconductor device for electric power conversion,

conversion means for convening the shunt current into a voltage; and

short-circuit current detection means for comparing the voltage from the conversion means with a voltage equivalent to a short-circuit current of the semiconductor device, and

wherein the semiconductor device is shut off on the basis of the comparison result of the short-circuit current detection means.

7. In an inverter apparatus for converting a DC voltage into an AC voltage,

an electric power conversion apparatus, wherein a semiconductor device for electric power conversion, a drive and protection means for driving and protecting the semiconductor device, and a power circuit supplying electric power to the drive and protection means are integrated in one module,

wherein said drive and protection means comprises:

a sensing terminal which senses a shunt current of the semiconductor device;

conversion means for converting the shunt current into a voltage; and

overcurrent detection means for comparing the voltage from the conversion means with a voltage equivalent to an overcurrent of the semiconductor device, and

wherein di/dt of the semiconductor device for electric power conversion is suppressed without shutting off a switching operation of the semiconductor device on the basis of the comparison result of the overcurrent detection means.

11. The electric power conversion apparatus according to claim 7, wherein, when the semiconductor device is shut off, said drive and protection means simultaneously shuts off all the gate input signals of semiconductor devices other than said semiconductor device, and said drive and protection means also outputs to an external control unit information indicating which of a plurality of protective functions shut off the semiconductor device.

8. In an inverter apparatus for converting a DC voltage into an AC voltage,

an electric power conversion apparatus, wherein a semiconductor device for electric power conversion, a drive and protection means for driving and protecting the semiconductor device, and a power circuit supplying electric power to the drive and protection means are integrated in one module,

wherein said drive and protection means comprises gate short-circuit detection means for comparing a logic level of a gate input signal for driving the semiconductor device with a logic level of a gate terminal voltage of the semiconductor device, and

wherein when the comparison result of the gate short-circuit detection means is negative, the semiconductor device is shut off.

9. In an inverter apparatus for converting a DC voltage into an AC voltage,

an electric power conversion apparatus, wherein a semiconductor device for electric power conversion, a drive and protection means for driving and protecting the semiconductor device, and a power circuit supplying electric power to the drive and protection means are integrated in one module,

wherein said drive and protection means comprises gate voltage abnormality determination means for comparing a gate voltage of a gate of the semiconductor device with a reference voltage for gate voltage abnormality determination, and

wherein the semiconductor device is shut off on the basis of the comparison result of the gate voltage abnormality determination means.

12. In an inverter apparatus for converting a DC voltage into an AC voltage,

an electric power conversion apparatus, wherein a semiconductor device for electric power conversion, a drive and protection means for driving and protecting the semiconductor device, and a power circuit supplying electric power to the drive and protection means are integrated in one module,

wherein the electric power conversion apparatus further comprises a voltage dividing circuit which divides a high power supply voltage;

a microcomputer which shapes into a waveform a voltage divided by said voltage dividing circuit and performs A/D conversion processing, and performs a map interpolating operation of the A/D converted value, and output means for converting a calculation result of the microcomputer into voltage level on the basis of a low voltage power supply reference, and outputting said voltage level to an external control unit as a voltage value of a high voltage power supply.

13. The electric power conversion apparatus according to claim 12, further comprising adjusting means for correcting a voltage map before product shipment and storing A/D conversion map data of a divided voltage of a high power supply voltage in the microcomputer beforehand.

14. The electric power conversion apparatus according to claim 12, wherein said microcomputer has overvoltage determination means for comparing overvoltage data, stored beforehand, with an A/D-converted value of a divided voltage of the high power supply voltage, and wherein, if the comparison result of the overvoltage determination means exceeds an overvoltage level, the semiconductor device is shut off, di/dt of the semiconductor device is suppressed, and the microcomputer outputs information to an external control unit indicating that the semiconductor device is shut off.