Phase voltage reconstruction based on Qorivva MCUs

The Pulse-Width Modulation (PWM) is a modulation technique that conforms the width of the pulse based on modulator signal. It allows the control of the power, supplied to electrical devices, such as motors. The average value of the voltage (current) fed to the load is controlled by turning the switch between supply and load on and off. In the motor control area, are many reasons why it is useful to know the value of the real phase voltages, which are applied by the inverter to a load. Based on these values, the motor control application can then reconstruct the real inverter phase voltages and use them in the advanced motor control algorithms such as observers, dead-time compensation, etc. This document describes the Freescale Qorivva family features/approaches that can be efficiently used for motor control algorithms.

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Originally published by Freescale Semiconductor at www.freescale.com as "Phase Voltage Reconstruction Based on the Qorivva Devices".