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A review of control methods based on losses reduction in electric drive systems with induction motors is performed in the first part of the paper. One of these control methods may consider the variation of the magnetizing inductance, an important aspect in increasing the efficiency of the drive system. There are presented some methods for estimating the magnetizing inductance. At the end of the paper...
The paper presents some results yielded from the research work concerning a prototype trolleybus with asynchronous motor drive system made from an PWM inverter and an asynchronous motor. Simulations on the driving system behaviour and experimental data concerning the prototype are also presented.
The paper deals with special features related to the a.c. electric driving system of a trolley-bus. One presents the driving system consisting of an asynchronous motor and inverter and some aspects regarding the PWM inverter control. The tests over the manufactured asynchronous motor were performed at a frequency equal to 50 Hz (for the rated speed) and a frequency equal to 106.6 Hz corresponding...
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