Three Phase Inverter / induction motor driver

  • Category: Hardware, Software
  • My Participation: 100%, 100%
  • Progress level: 100%
  • Project date: 2015

Details

Project was development for Master's dissertation.

    Voltage input: 1ph / 230 V
    Current input: 2-3 A RMS
    Output current: 3 A RMS per phase
    Output Voltage: 220V RMS line voltage
    Output frequency: 0 – 100 Hz
    PWM frequency: 5 – 15 kHz

Hardware:

    CPU: STM32F446
    Communication: USB, CAN.
    Power stage: LC input filter, 6x IGBT transistors, transistor RC snubbers, separately gate-driver power supplies etc.
    Galvanically isolated power stage
    Sensors: current sensor per phase, rotational speed sensor, thermistor (transistors temp. monitoring)

Firmware features:

    Control algorithm: scalar V/f = const. with parameterized characteristics. Possibility to extend for Field Oriented Control of induction motors
    PWM signal for transistors gate driving are generated using DMA and dedicated Timer output channels.
    Sinus table is dynamically scaled (for different output voltage RMS values)
    Data acquisition from all sensors, real-time data streaming including phase currents (3kHz sampling)
    Over-current protection.
    Parameters of device are controlled by protocol - commands (USB communication)