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C . BHURTUN Faculty of Engineering University of Mauritius Reduit , MAURITIUS. Real-Time Efficiency Estimation of an Electric Motor. Outline. Introduction Losses and Efficiency System Set Up Tests and Results Conclusions. Electric Motors Optimum Operation
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C.BHURTUN Faculty of Engineering University of Mauritius Reduit, MAURITIUS Real-Time Efficiency Estimation of an Electric Motor
Outline • Introduction • Losses and Efficiency • System Set Up • Tests and Results • Conclusions
Electric Motors Optimum Operation Efficiency: Direct Method and Loss Segregation Method Variation in Efficiency Introduction
Copper Losses (I2R) Mechanical Losses (Friction) Magnetic Losses (Eddy Current and Hysteresis) Stray Losses (Harmonic Distortion) Losses
Efficiency ()= (Output Power)/(Input Power) =1- [Losses/Input] = 1 – [(PK + PC)/(Input Power)] PK = Fixed Losses PC = Variable Losses Efficiency (Loss Segregation Method)
Efficiency= (Output Power)/(Input Power) Output Power= 2NT N= Speed T= Torque Efficiency (Direct Method)
Loss Segregation Efficiency Computation • Microcontroller based System • Use of single current sensor • Less than 5% difference • Simple and Cost Effective • Can be adapted to other types of Motor CONCLUSIONS