| Abstract |
The paper analyses the performances of a current source inverter with voltage-controlled current
modulation, feeding a three-phase induction motor. The discussed current source inverter is fed by a
diode rectifier through a current controlled step-down converter. The investigation is conducted by
means of an experimental comparison between the proposed inverter and the well-known voltage
source inverter drive. Three aspects have been pointed out: harmonic losses, insulation stress, common
mode phenomena. The power lost in the induction motor as well as in both inverters has been
measured in several steady-state operating conditions. The voltage stress generated by the switching
on the motor windings has been recorded for both system under consideration. Finally, the common
mode voltage applied to the motor, as well as the circulating common current have been assessed;
moreover, the shaft voltage produced by the switching converter operation has been analysed. Aim of
the paper is the evaluation of the potential benefits achievable by a current source inverter with a small
power induction motor. |
