scholarly journals Determination of rotor slot number of an induction motor using an external search coil

2009 ◽  
Vol 22 (2) ◽  
pp. 227-234 ◽  
Author(s):  
Ozan Keysan ◽  
Bülent Ertan
Keyword(s):  
Induction Motor ◽  
Test Machine ◽  
Motor Speed ◽  
Induced Voltage ◽  
Search Coil ◽  
Fft Analysis

This paper describes determination of the number rotor slots of an induction motor from the induced emf in an external search coil. This information is needed in prediction of motor speed from the external search coil induced voltage. The approach is based on identifying saliency harmonics and rotor slot harmonics, via FFT analysis of the external search coil emf. The proposed approach is tested on an induction motor driven by the mains supply. The experiments are repeated with a PWM supply. It is shown that the method works well in both cases and the number of rotor slots of the test machine is accurately predicted. .

scholarly journals Electric Drive Control with Rotor Resistance and Rotor Speed Observers Based on Fuzzy Logic

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
C. Ben Regaya ◽  
A. Zaafouri ◽  
A. Chaari
Keyword(s):  
Fuzzy Logic ◽  
Induction Motor ◽  
Simple Algorithm ◽  
Simultaneous Estimation ◽  
Rotor Speed ◽  
Motor Speed ◽  
Speed Sensor ◽  
Rotor Resistance ◽  
Drive Control

Many scientific researchers have proposed the control of the induction motor without speed sensor. These methods have the disadvantage that the variation of the rotor resistance causes an error of estimating the motor speed. Thus, simultaneous estimation of the rotor resistance and the motor speed is required. In this paper, a scheme for estimating simultaneously the rotor resistance and the rotor speed of an induction motor using fuzzy logic has been developed. We present a method which is based on two adaptive observers using fuzzy logic without affecting each other and a simple algorithm in order to facilitate the determination of the optimal values of the controller gains. The control algorithm is proved by the simulation tests. The results analysis shows the characteristic robustness of the two observers of the proposed method even in the case of variation of the rotor resistance.

scholarly journals Determination of Stator Leakage Reactance of Small Induction Motor. Search Coil Method considering Current in Rotor End Rings.

1994 ◽  
Vol 114 (3) ◽  
pp. 344-345 ◽  
Author(s):  
Tatsuo Horii ◽  
Tomotsugu Kubota ◽  
Kazumi Kurihara ◽  
Genjiro Wakui
Keyword(s):  
Induction Motor ◽  
Search Coil ◽  
Coil Method

Variable Speed Vector Control for Induction Motor of Electric Vehicle

2014 ◽  
Vol 699 ◽  
pp. 759-764
Author(s):  
Amilia Emil Hasan ◽  
Haryani Hassan ◽  
Ismadi Bugis
Keyword(s):  
Embedded System ◽  
Vector Control ◽  
Induction Motor ◽  
Control Method ◽  
Torque Ripple ◽  
Electromagnetic Torque ◽  
Motor Speed ◽  
Speed Controller ◽  
Speed Performance ◽  
Constant Output

This paper presents the speed performance of an induction motor by using a vector control. The control scheme used is an indirect vector control for define speed command. The main focus of this research is to observe on the dynamic speed performance of the induction motor when the command speed is given to the motor. In this study, the system of indirect vector control will be built by using Matlab Simulink. In fact, the expression of exciting flux linkage and electromagnetic torque are used to create a simple embedded system which to find out the effects of flux weakening in motor while, the gain of the speed controller is 100. The result shows that the vector control method will cause immediate the motor speed response with a small electromagnetic torque ripple. Furthermore, the output mechanical torque starts to decrease when the motor speed above the base speed to maintain a constant output power operation. This paper contributes a new algorithm to analysis the system when the speed motor is higher than a base speed.

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