The improvement avalability of a double star asynchronous machine supplied redondant voltage source inverters

Abstract EN

This paper proposes the availability analysis of a double star stator windings asynchronous machine.

Each star is supplied by its own static PWM inverter.

The active redundancy of the inverters improves reliability, availability and safety of the system since the loss of a phase does not stopped the motor.

Detailed Markov Models are developed to analyze the availability.

A reintegration control strategy of the repaired faulty inverter increases system survivability by allowing faulty inverter to regain the drive motor operation.

The reintegration control strategy is based on the special use of the field oriented control to resynchronize the output frequency of the repaired inverter with the motor speed.

Simulation results are carried out to show the ability of a fault tolerant architecture.