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An increasing part of low voltage standard induction motors operates with PWM voltage source inverters using IGBTs and they are applied to a wide range of power 0.1 kW up to some MW. The PWM (pulse width modulation) inverter mode of control generates a large frequency spectrum of overvoltages. The resulting undesired overvoltages at the motor terminals stress the motor insulation. Usual standards...
Advances in power electronics technology have improved the performance and output waveforms of PWM voltage source inverters. Switching frequencies of 2 to 15 kHz with 0.1 mus rise times are common with the current IGBT technology while allowing for power levels over 200 kW. While the high switching speeds and zero switching loss schemes drastically improve the performance of the PWM inverters, the...
Many of today's induction machines are operated using variable speed drives (VSD). VSDs are used for controlling the speed of induction machine by adjusting the amplitude and frequency of the AC voltage. These adjustments are made by advanced technology in semiconductors, which are faster switching devices. Faster switching reduces the switching power loss, requiring less heat sink, thus enabling...
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