Torque Control in Three-Level Converter-Fed Asynchronous Machine Drive

This example shows how to control the torque in an asynchronous machine (ASM) based electrical-traction drive. A high-voltage battery feeds the ASM through a three-phase three-level neutral-point clamped controlled converter. The ASM operates in both motoring and generating modes. An ideal angular velocity source provides the load. The Control subsystem uses the field-oriented control strategy to control the flux and torque. The current control is PI-based. A proportional controller regulates the neutral point voltage. The simulation uses several torque steps in both motor and generator modes. The Scopes subsystem contains scopes that allow you to see the simulation results.

Model

Simulation Results from Simscape Logging

The plot below shows the requested and measured torque for the test, as well as the phase currents in the electric drive.