Reinforced Isolated Three-Phase Inverter Reference Design with Current, Voltage and Temperature Protection

This design provides a reference solution for a three-phase inverter rated up to 10kW, designed using the reinforced isolated gate driver UCC21530, reinforced isolated amplifiers AMC1301 and AMC1311, and MCU TMS320F28027. Lower system cost can be achieved by using the AMC1301 with the MCU's internal ADC to measure the motor current and using a bootstrap supply for the IGBT gate driver. The inverter is designed with protection against overload, short circuit, ground fault, DC bus under/overvoltage and IGBT module overtemperature.

characteristic

• ● Reinforced isolated inverter, suitable for 200V to 690V AC drives with rated power up to 10kW
• ● Simple yet effective gate driver with 4A source and 6A sink output capabilities
• ● Reinforced isolated amplifier with high bandwidth (>200kHz) for inverter current, DC bus voltage and IGBT module temperature measurement; able to use the MCU’s internal ADC
• ● Calibrated current measurement accuracy ±0.5% over –25°C to 85°C temperature range
• ● Provide protection against DC bus undervoltage, overvoltage, overload, ground fault and overtemperature
• ● Using a bootstrap-based power supply for the high-side gate driver reduces the overall cost of the power supply required