On the Influence of Stator Slot shape on the Energy Conservation Associated with the Submersible Induction Motors | Science Publications

American Journal of Applied Sciences

P. Navaneethan¹  M. Sundaram¹ 

关键词: Submersible induction motor;    optimum design;    magnetic circuit;    rotational machine;    magnetizing current;    power factor;    electrical energy;    electric machines;    genetic algorithms;    stator slot;   

DOI  :  10.3844/ajassp.2011.393.399

学科分类：自然科学（综合）

来源: Science Publications

【 摘 要 】

Problem statement: A good design of Submersible Induction Motor is required to maintainmaximum efficiency level. This can be achieved in one way by optimum design of magnetic circuit.The magnetic circuit of an Induction Motor is formed by the combination of Stator core, Rotor coreand air gap. In applications like Submersible Motor Pumps, the air gap cannot be minimized beyond0.5 mm, because of the machining tolerance required, due to large core length. Now a day, theefficiency of such motor is improved by die-cast copper rotor. But the cost of such motor is more andsometimes the rotor core properties are getting changed due to high temperature during die- castingprocess. Approach: A new stator slot shape is proposed based on the results obtained from theiterations with Rotational Machine Expert (RMxprt) software and the performance is compared withthat of the existing stator slot shape, for a 3-phase, 5 hp, 380 V, 2-pole motor The motor with both thestator slot shapes have been analyzed with the Rotational Machine Expert (RMxprt) software Results:The magnetizing current of new design is 3.25 A, compared to the existing design of 4.67 A. Theoverall efficiency of the Submersible Induction Motor pump set is 5% more than that of the existingone. The discharge of the pump set has increased by about 80 liters per minute. Conclusion: Theproposed stator slot dimension is suitable for more efficiency, less magnetizing current and a goodpower factor. This design modification does not require much cost and needs no complexmanufacturing process.

【 授权许可】

Unknown