Analysis on Power Loss of the Three-Phase Induction Motor Fed by VVVF under Constant Torque Load

Meng Wu; Xue Shen Cui; Jun Chi Li

doi:10.4028/www.scientific.net/AMM.635-637.1207

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 635-637Analysis on Power Loss of the Three-Phase...

Analysis on Power Loss of the Three-Phase Induction Motor Fed by VVVF under Constant Torque Load

Abstract:

For air fan and water pump load, variable voltage and variable frequency (VVVF) energy-saving effect is very significant. This paper focuses on the study of energy-saving effect implemented by converter of the motor at constant torque load. In order to analyze the influence of the loss controlled by the voltage and frequency in detail, we obtain the theoretical calculation formula of total loss and input power by means of the classification of power loss of asynchronous motor under the cantilever equivalent circuit, take a 5.5kW motor as an example, a series of experimental schemes are designed and the general change rules of total loss and input power are studied respectively with the different voltage to frequency ratio. The results show that the measured values are basically accordant with the theoretical calculation value. On different conditions of voltage frequency ratio, optimal value exists in the total loss instead of input power.

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Periodical:

Applied Mechanics and Materials (Volumes 635-637)

Pages:

1207-1211

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.635-637.1207

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Online since:

September 2014

Authors:

Meng Wu*, Xue Shen Cui, Jun Chi Li

Keywords:

Constant Torque Load, Induction Motor (IM), Power Loss, Voltage Frequency Ratio, VVVF

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