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Calculation of a Torque Ripple a Three-Phase Asynchronous Motor Supplied by a PWM Controlled Inverter

Záskalický P.

Maszyny Elektryczne : zeszyty problemowe

2014

Nr 2(102)

53--58

The paper deals with steady state analysis of electromagnetic torque ripples of a three-phase induction machine, which is supplied by an IGBT transistors bridge connected inverter. The inverter’s output voltage is controlled by a PWM of the input DC voltage. The complex Fourier series analysis of the inverter’s output voltage was made, to obtain a spectrum of the harmonic supply voltages. The different voltage harmonic was applied to the two-phase asynchronous machine model to obtain the electromagnetic torque waveforms for various operation conditions.

Control of Two-Phase Induction Motor Using a Conventional Three-Phase Bridge Inverter

Kaňuch J, Višnyi P.

Maszyny Elektryczne : zeszyty problemowe

2013

Nr 4(100), cz. 2

171--174

This paper describes the control of two-phase induction motor using a conventional three-phase bridge inverter. Two-phase induction motors in comparison with conventional three phase motors have the advantage of a simple stator current vector control. The physical phase currents themselves represent the coordinates of the stator current vector. For this reason two-phase induction motors are ideal for educational purposes as well as for experiments verifying various control strategies (for example sensorless speed control). The inherently best inverter topology for a two-phase induction motor consists of two single-phase bridge inverters. However, using a conventional three-phase bridge inverter may be an interesting alternative described in this paper.