Improved stator core design for reducing higher space harmonics in induction motors.

Many methods have been used to detect the motor speed. All of these methods are based on the parameter equation of motor and the detection results are influenced by parameters of induction motor more or less. The research of Speed Measurement method without of Motor parameters effect is very significant. Based on the harmonic generated in the air gap magnetic field by the stator core on the alveolar surface, directly by the analysis and testing of stator current harmonic, the rotor speed is detected which is proportional to the speed of frequency components. Experiment results show that this method is good, and the accuracy achieve a desired effect in real time.

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Complex finite element computation of induction motors with consideration of space harmonics

IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03. ◽

10.1109/iemdc.2003.1211273 ◽

2003 ◽

Cited By ~ 3

Author(s):

S. Mezani ◽

B. Laporte ◽

N. Takorabet

Keyword(s):

Finite Element ◽

Induction Motors ◽

Space Harmonics ◽

Element Computation ◽

Finite Element Computation

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Experimental generation and quantification of stator core faults on induction motors

2009 IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives ◽

10.1109/demped.2009.5292775 ◽

2009 ◽

Cited By ~ 6

Author(s):

P. M. de la Barrera ◽

M. R. Curti ◽

G. R. Bossio ◽

G. O. Garcia ◽

J. A. Solsona

Keyword(s):

Induction Motors ◽

Stator Core

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Effects of magnetic saturation on induction machines driven by static converters

Sba Controle & Automação Sociedade Brasileira de Automatica ◽

10.1590/s0103-17592004000200007 ◽

2004 ◽

Vol 15 (2) ◽

pp. 181-189

Author(s):

Darizon A. de Andrade ◽

Marcos A. A. de Freitas ◽

Luciano M. Neto ◽

Hélder de Paula ◽

José L. Domingos

Keyword(s):

Harmonic Functions ◽

Induction Motors ◽

Induction Machines ◽

Magnetic Characteristics ◽

Magnetic Saturation ◽

Pwm Converters ◽

Static Converters ◽

Space Harmonics ◽

Flux Density Distribution ◽

Good Agreement

The effects of magnetic saturation on the operation of induction motors driven by static converters are analyzed. A mathematical model based on magnetic harmonic functions is used to account for saturation. Distortions on the air gap flux due to non-linear magnetic characteristics lead to appearance of space harmonics in the resultant flux density distribution. This causes specific distortions in stator and rotor time quantities, which are different from those due to static converter. Operation with six pulse and sinusoidal PWM converters under saturated conditions is considered. Comparisons of experimental and simulated results are presented and found to be in very good agreement.

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