1.3 PMSM FOC using Quadrature Encoder

Permanent Magnet Synchronous Motor (PMSM) is controlled using Field Oriented Control (FOC). Rotor position and speed is determined using quadrature encoder sensor. Motor start/stop operation is controlled by the switch and motor speed can be changed by the on-board potentiometer. Waveforms and variables can be monitored runtime using X2CScope.

Key features enabled in this project are:

• Dual shunt current measurement
• Speed control loop
• Field weakening

• PMSM_FOC:

  This component configures FOC algorithm parameters, motor parameters and motor control board parameters. It connects to underlying peripheral libraries AFEC and PWM. This components auto configures ADC channels and PWM channels as per PMSM_FOC component configurations.

• AFEC Peripheral:

  The AFEC is used to measure analog quantities. Four channels are used to measure the Phase Current U, the Phase Current V, the DC Bus Voltage and the Potentiometer. Conversion is triggered at the PWM (zero match + offset of the switch delay).

• PWM Peripheral:

  This peripheral is used to generated three phase synchronous PWM waveforms. Fault functionality is also enabled to switch off the output waveforms asynchronously.

• TC QDEC Peripheral:

  TC peripheral is configured in QDEC mode. It is used to decode the rotor position and speed from quadrature encoder signals.

• X2CScope:

  This component adds X2C scope protocol code. This uses UART to communicate to the host PC. X2CScope allows user to monitor variables runtime.

• UART Peripheral:

  The UART is used for X2CScope communication to observe graphs and variable values in run time.

This project has been created using Harmony QSpin Tool. For details refer Harmony QSpin.