Rotor saliency improved structural design for cost reduction in single-phase line-start permanent magnet motor

Compressor electric motor drives play a key role in energy consumption of residential refrigerators. Electrical efficiency, robustness to starting and overloads and speed variation range define the performance of compressor electric motor drives. Between the lowest cost fixed speed split phase capacitor grid-connected induction motor, with lower efficiency, and the higher-efficiency grid connected cage PM rotor split phase capacitor motor and the inverter fed variable PM synchronous motor of highest initial costs, we introduce in this paper a 2 speed grid-connected motor drive. The proposed topology uses a separate split phase winding, cage-PM-fourpole rotor synchronous motor (PMSM) for low speed (4 pole) and a single phase (main) winding for 2 pole operation. The target is 85% efficiency at 50W output for 4 poles (low speed) PMSM operation with good starting and at least 60% efficiency in 2 pole (high speed) induction motor operation at 100W, with smooth transients from low to high speed under full torque load. Circuit models for steady state and for transients with dedicated Matlab codes have been developed, with key FEM validation, to substantiate full scale experiments as the main contributions of the paper for a ready to use industrial solution.

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2/4 POLES split phase capacitor motor for small compressors: A comprehensive characterization

Kalluf

Espindola

Tutelea

et al. 2012

2012 IEEE Energy Conversion Congress and Exposition (ECCE)

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Optimal rotor shape with third harmonic for maximizing torque and minimizing torque ripple in IPM motors

Wang

Zhu

Ombach

et al. 2012

2012 XXth International Conference on Electrical Machines

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Design and Optimization of a Two-Pole Line-Start Ferrite Assisted Synchronous Reluctance Motor

Baka

Sashidhar

Fernandes

2018

2018 XIII International Conference on Electrical Machines (ICEM)

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Rotor saliency improved structural design for cost reduction in single-phase line-start permanent magnet motor

Cited by 9 publications

References 7 publications

2/4 POLES split phase capacitor motor for small compressors: A comprehensive characterization

2/4 POLES split phase capacitor motor for small compressors: A comprehensive characterization

Optimal rotor shape with third harmonic for maximizing torque and minimizing torque ripple in IPM motors

Design and Optimization of a Two-Pole Line-Start Ferrite Assisted Synchronous Reluctance Motor

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