A Hybrid Methodology for Analyzing the Performance of Induction Motors with Efficiency Improvement by Specific Commercial Measures

Autor: Christopher H. T. Lee, Huang Yuanfeng, Ai Chengliu, James L. Kirtley, Zhiwei Zhang, Wang Haifeng
Přispěvatelé: School of Electrical and Electronic Engineering
Rok vydání: 2019
Předmět:
Control and Optimization
Computer science
Stator
Energy Engineering and Power Technology
02 engineering and technology
Die-cast Copper Rotor
Automotive engineering
law.invention
air gap length
die-cast copper rotor
loss analysis
law
induction motors
0202 electrical engineering
electronic engineering
information engineering
Eddy current
0501 psychology and cognitive sciences
Electrical and Electronic Engineering
Engineering (miscellaneous)
energy efficiency
050107 human factors
Renewable Energy
Sustainability and the Environment
Rotor (electric)
020208 electrical & electronic engineering
05 social sciences
stator windings
Finite element method
Air Gap Length
Electromagnetic coil
Electrical and electronic engineering [Engineering]
Equivalent circuit
Air gap (plumbing)
Induction motor
Energy (miscellaneous)
Zdroj: Energies
Volume 12
Issue 23
ISSN: 1996-1073
DOI: 10.3390/en12234497
Popis: This paper presents a hybrid methodology to analyze the commercial measures of changing stator windings and adjusting air gap length to upgrade efficiency of typical three-phase direct-on-line induction motors with die-cast copper rotor (DCR). The calculation is carried out through combining the time-stepping and time-harmonic finite element analysis (FEA) and the circuit equivalent circuit model. Typical full-load performance of stator windings with different air gap lengths are computed by MATLAB invoking the 2D transient and eddy current field analysis in ANSYS/MAXWELL. Then, MATLAB scripts about post-processing of the FEA results are used to obtain the full-load running performance including the loss distribution and circulating current. The MATLAB scripts of circuit model built based on the FEA results is used to compare the overload and starting performance. After that, four stators with the four windings and three DCRs with different air gap of an 11 kW motor are fabricated and tested to validate the calculations. By comparing results from both calculations and measurements, it is shown that the factors of stator windings and air gap length can effectively improve the efficiency of the 11 kW DCR induction motor without the addition of extra materials. The motor with the 11/12 pitch Y-&Delta
series winding and 0.6 mm air gap has the best performance, in terms of efficiency, overloading capability and starting performance. Its efficiency can increase from 90% to the highest 92.35% by sole adjustment of stator winding and air gap length.
Databáze: OpenAIRE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje