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According to earlier work and papers by other authors, the main flux path of an induction machine is not only saturated due to the magnetizing current, or in other words ldquothe magnetizing inductance can be modeled as a function of torquerdquo. In addition, at a given magnetizing current, the flux linkage decreases with rising supply frequency. These effects should be considered when using control...
According to earlier work and papers by other authors, the main flux path of an induction machine is not only saturated due to the magnetizing current or, in other words, ldquothe magnetizing inductance can be modeled as a function of torquerdquo. In the paper a method is proposed to extend the induction machine's standard fundamental wave model taking into consideration the changes of the main inductance...
The vector control scheme for induction motors using the rotor flux reference frame is well known. To provide proper torque production, knowledge of the rotor time constant is essential. Many adaptation schemes have been presented using different paradigms. In this paper a scheme for rotor time constant adaptation is applied, which uses the difference between the measured and the calculated reactive...
The effects of bearing-currents in variable speed drives have been reported during the last few years. This paper examines the influence of different types of motor supply cables on shaft currents due to the high du/dt of the inverter voltage of about 2 to 10 kV/mus. Voltage source inverters with pulse-width-modulation produce a common mode voltage at the motor terminals. Due to the parasitic capacities...
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