This chapter provides a causes and effects of inverter
harmonics on ac drive system. It begins with an introduction to harmonics -
unwanted higher frequencies superimposed on the fundamental power frequency
that distorts voltage and current waveforms. The generation of different
harmonic orders and sequences is explained along with graphical
representations.
The effects of harmonics, which includes deviations in torque-speed curves,
increased skin effect and associated losses, cogging and crawling effects, noise
and vibration issues, and impacts on efficiency and temperature rise has been
provided considering induction motor as a load.
The harmonic interaction produces problematic effects like torque pulsations,
speed oscillations, mechanical vibrations and noise. Additional iron and copper
losses due to the higher frequencies also lower efficiency and lead to
excessive heating. Mitigation methods like proper design of the number of
stator and rotor slots has been suggested. Overall, the analysis provides important
insights into analyzing, quantifying, and minimizing the impacts of supply
harmonics feeding induction motors.
Author(s) Details:
Umesh Hiwase,
Department of Electrical Engineering, Priyadarshini College of Engineering, Nagpur (MS), India.
Rashmi Keswani,
Department of Electrical Engineering, Priyadarshini College of Engineering, Nagpur (MS), India.
Please see the link here: https://stm.bookpi.org/CPPSR-V6/article/view/13251
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