scholarly journals Equivalent Circuit Parameter Calculations and Characteristics Analysis of 2-DoF Direct Drive Induction Motor with a Slotted Solid Rotor

2019 ◽  
Vol 9 (11) ◽  
pp. 2191
Author(s):  
Haichao Feng ◽  
Jikai Si ◽  
Wei Wu ◽  
Lianghui Dong ◽  
Zhiping Cheng
Keyword(s):  
Equivalent Circuit ◽  
Induction Motor ◽  
Equivalent Circuit Model ◽  
Circuit Diagram ◽  
Circuit Parameter ◽  
Direct Drive ◽  
Characteristics Analysis ◽  
Cage Rotor ◽  
Two Degree Of Freedom ◽  
Equivalent Circuit Parameter

In this paper, a modified equivalent circuit model (ECM), which considers the effects of an arc-shaped stator structure and saturation, is presented to calculate the characteristics of a two-degree-of-freedom direct drive induction motor (2DoFDDIM). The motor has a novel slotted solid rotor (SSR), which is slotted along the axial and circumferential directions, and copper is cast in the slots. The SSR is equivalent to a cage rotor by analyzing the current distribution using the circuit diagram. The corrected ECM parameter expressions of a cage rotor are proposed to calculate the SSR parameters. The characteristics obtained by ECM and finite element method are compared to verify the accuracy of the modified ECM. This paper provides reference for calculating the parameters of the induction motor with SSR.

scholarly journals Nonintrusive Method for Induction Motor Equivalent Circuit Parameter Estimation using Chicken Swarm Optimization (CSO) Algorithm

2021 ◽  
Vol 18 (1) ◽  
pp. 21-29
Author(s):  
M. Aminu ◽  
M. Abana ◽  
S.W. Pallam ◽  
P.K. Ainah
Keyword(s):  
Parameter Estimation ◽  
Equivalent Circuit ◽  
Induction Motor ◽  
Estimation Method ◽  
Equivalent Circuit Model ◽  
Test Method ◽  
Equivalent Circuits ◽  
Circuit Parameter ◽  
Swarm Optimization ◽  
Chicken Swarm Optimization

This paper presents a nonintrusive method for estimating the parameters of an Induction Motor (IM) without the need for the conventional no-load and locked rotor tests. The method is based on a relatively new swarm-based algorithm called the Chicken Swarm Optimization (CSO). Two different equivalent circuits implementations have been considered for the parameter estimation scheme (one with parallel and the other with series magnetization circuit). The proposed parameter estimation method was validated experimentally on a standard 7.5 kW induction motor and the results were compared to those obtained using the IEEE Std. 112 reduced voltage impedance test method 3. The proposed CSO optimization method gave accurate estimates of the IM equivalent circuit parameters with maximum absolute errors of 5.4618% and 0.9285% for the parallel and series equivalent circuits representations respectively when compared to the IEEE Std. 112 results. However, standard deviation results in terms of the magnetization branch parameters, suggest that the series equivalent circuit model gives more repeatable results when compared to the parallel equivalent circuit. Keywords: Induction motor, Chicken Swarm Optimization, parameter estimation, equivalent circuit, objective function

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