Analysis and Performance Evaluation of an Efficient Power-Fed Permanent Magnet Adjustable Speed Drive

This paper proposes a novel power-fed permanent magnet adjustable speed drive (PF-PMASD) to regulate the speeds of pumps and fans for energy saving. The drive features that the slip power induced in the wound rotor of the drive can be fed to the power grid by a power electronic converter. The struct...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 66; no. 1; pp. 784 - 794
Main Authors Li, Yibo, Lin, Heyun, Huang, Hai, Chen, Chao, Yang, Hui
Format Journal Article
LanguageEnglish
Published New York IEEE 01.01.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Adjustable speed drive (ASD)
Control
Converters
Electromotive forces
Energy conservation
Finite element method
Induction motors
loss and efficiency
Magnetic cores
Magnetism
Mathematical analysis
Mathematical model
Mathematical models
Performance evaluation
permanent magnet
Permanent magnets
Power factor
power fed
Rotors
size equations
Slip
Synchronous machines
Torque
Variable speed drives
Windings
wound rotor (WR)
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Summary:This paper proposes a novel power-fed permanent magnet adjustable speed drive (PF-PMASD) to regulate the speeds of pumps and fans for energy saving. The drive features that the slip power induced in the wound rotor of the drive can be fed to the power grid by a power electronic converter. The structure, operation principle, and control strategy of the drive are introduced and investigated. The mathematical model of the PF-PMASD is built by referring to the models of the traditional permanent magnet synchronous machine and wound rotor induction motor, based on which the power-size equation for the drive is deduced. The losses and efficiencies of the drive under different slips are also calculated and evaluated. The relationships between the slip and the duty cycle of the insulated-gate bipolar transistor in the boost chopper are revealed by the mathematical model of the control unit. The steady characteristics including electromotive forces, phase currents, and torques under different operation states are computed and analyzed comprehensively by finite-element analysis. The speed regulation characteristics, the power factor, and the energy-saving capabilities of the drive are investigated by experimental test. The analysis results indicate that the proposed PF-PMASD possesses a remarkable speed regulation capability with high efficiency.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2018.2832018