A Novel Integrated Method of Motor Discrete Variable Frequency Starting and Harmonic Filtering

Abstract:

The started motors with the discrete frequency converter are characterized by high staring torque and a large number of harmonics when the motors draw heavy-loads. It may pull down the voltage of the power supply network; it will severely influence the other electrical devices in the same power network. Furthermore, it increases the motor temperature, which may lead to motor damage. Therefore, a novel integrated method of motor discrete variable frequency starting and harmonic filtering is presented in this paper, to achieve quick and smooth motor starting, to produce high staring torque, to keep the harmonics in permitted ranges. The following works have been done in the study: analyze the principle, design the structure of the integrated device, and present the implementation steps. The motor starter developed with this method has been successfully applied to the loads of the drive equipments in the kiln, coal grinding mill or the mine. It can improve the starting performance when the motors draw the heavy-loads, save energy, stabilize the voltage of the power supply network.

• Periodical: Applied Mechanics and Materials (Volume 437)
• Pages: 522-526
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.437.522
• Online since: October 2013
• Authors: Jing Chen, Qing Wang*, You Xin Yuan, Xing Yu Song
• Keywords: Discrete Variable Frequency, Harmonic Filtering, Variable Reactance

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