3-Phase Inverter Using SiC MOSFET

This reference design provides design guide, data and other contents of the 3-phase inverter using 1200 V SiC MOSFET. It drives AC 440V motors.

PCB Photo (Inverter Board)
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Features

  • Drives AC 440 V motor using 1200 V SiC MOSFETs
  • Outline size : 250 mm x 145 mm (Inverter Board)
  • Uses optimum SiC MOSFETs, photocouplers, and operational amplifiers etc.

Description

Power In (AC-DC Board) 3-phase AC 340 to 440 V, 16 A (Max.)
Power Out (AC-DC Board) DC 530 to 600 V
Power Input (Inverter Board) DC 530 to 670 V
Power Output (Inverter Board) 3-phase AC 340 to 440 V, 15 A
Fault Detection Overcurrent(U-phase/V-phase/W-phase), Bus overvoltage, Bus overcurrent , Overtemperature(2 ch.)
Efficiency Curve (Example)
Efficiency Curve (Example)

Design Documents

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Design Data

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Used Toshiba Items

Part Number Device Category Portion Usage Description
Power SiC MOSFETs Inverter switching·6 N-ch SiC MOSFET, 1200 V, 0.045 Ω(typ.)@18 V, TO-247-4L(X), 3rd Gen.
Power SiC MOSFETs Inverter switching·6 N-ch SiC MOSFET, 1200 V, 0.045 Ω(typ.)@18V, TO-247, 3rd Gen.
Photocoupler (photo-IC output) Gate driver·6 Photocoupler (photo-IC output), IGBT driver, IOP=+/-4.0 A, 5000 Vrms, SO6L
Photocoupler(Isolation Amplifier) Isolated sensor·5 Photocoupler(Isolation Amplifier), Analog output, 5000 Vrms, SO8L(LF4)
Comparator (CMOS) Comparator for error detection·3 Dual Comparator (CMOS), 7 V, +/-3.5 V, SOT-505(SM8)
Op-amp (Bipolar) Sensor amplifier·2 Dual Op-amp (Bipolar), 12 V, +/-6 V, SOT-505(SM8)
Op-amp (CMOS) Sensor amplifier·3 Dual Op-amp (CMOS), 7 V, +/-3.5 V, SOT-505(SM8)
Op-amp (CMOS) Sensor amplifier·2 Single Op-amp (CMOS), 5.5 V, +/-2.75 V, SOT-25(SMV)
L-MOS SHS series (TC74LCX-equivalent) Gate logic control·3 One-Gate Logic(L-MOS), 2-Input/AND, SOT-505(SM8)
Point regulator (single output) Internal power supply·4 200 mA Fixed Output LDO Regulator, 5 V, SOT-353F(UFV)
Small-signal MOSFET Driver for photo coupler etc.·7 N-ch MOSFET, 30 V, 0.1 A, 3.6 Ω@4V, SOT-323(USM)
Small Low ON resistance MOSFETs Switching for isolated power supply·2 N-ch MOSFET, 30 V, 15 A, 0.0089 Ω@10V, TSOP6F

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