Kumar, Binoj AC and Narayanan, G (2010) A VARIABLE SWITCHING FREQUENCY PWM TECHNIQUE FOR INVERTER-FED INDUCTION MOTOR TO ACHIEVE SPREAD SPECTRUM. In: National Power Electronics Conference (NPEC) 2010, 11-13 June 2010, IIT Roorkee, Roorkee, Uttarakhand, India.
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Abstract
Voltage Source Inverter (VSI) fed induction motors are widely used in variable speed applications. For inverters using fixed switching frequency PWM, the output harmonic spectra are located at a few discrete frequencies. The ac motordrives powered by these inverters cause acoustic noise. This paper proposes a new variable switching frequency pwm technique and compares its performance with constant switching frequency pwm technique. It is shown that the proposed technique leads to spread spectra of voltages and currents. Also this technique ensures that no lower order harmonics are present and the current THD is comparable to that of fixed switching frequency PWM and is even better for higher modulation indices.
| Item Type: | Conference Paper |
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| Additional Information: | Copyright for this article belongs to the IIT Roorkee |
| Department/Centre: | Division of Electrical Sciences > Electrical Engineering |
| Date Deposited: | 12 Jul 2014 14:53 |
| Last Modified: | 12 Jul 2014 15:06 |
| URI: | http://eprints.iisc.ac.in/id/eprint/49398 |
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