The model of double-cage induction motor for the analysis of thermal fields in transient operations

AbstractEmergency motor switch-on happens occasionally while operating a doublesquirrel- cage motor at full supply voltage with the rotor blocked (e.g., in coal mills). After releasing the blockage, the by now heated motor is started up again. However, the mechanical stress caused by the increased temperature poses considerable hazards to the squirrel-cage winding. This paper presents a double-cage induction motor model for analysis of thermal fields in transient operation. The thermal field for the rotor of a doublesquirrel- cage motor of soldered or cast structure, operating in the conditions described, has been calculated in the present paper using a thermal network method. Measurement results have been presented for the double-squirrel-cage winding temperature for a soldered cage construction in the blocked rotor state.

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Study and analysis the effect of variable applied voltage on SCIM performances based on FEA

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v11.i3.pp1230-1240 ◽

2020 ◽

Vol 11 (3) ◽

pp. 1230

Author(s):

Waleed Khalid Shakir Al-Jubori ◽

Yasir Abdulhafedh Ahmed

Keyword(s):

Steady State ◽

Induction Motor ◽

Applied Voltage ◽

Supply Voltage ◽

Finite Elements Analysis ◽

Steady State Condition ◽

Squirrel Cage ◽

Voltage Variation ◽

Three Phase ◽

Cage Induction Motor

Study and analysis the effect of variable applied voltage on SCIM performances based on FEA is presented. Three phase squirrel cage induction motor SCIM has been investigated and numerically simulated using finite element method (FEM) with the aid of ANSYS software (RMxprt and Maxwell 2D/3D). This research presents study and analysis of the effects of the voltage variation on performance and efficiency of the three-phase induction motor of the squirrel cage type. The Finite Elements Analysis Method FEA is used as one of the best methods for analysis and simulation of electrical motors in addition to the possibility of dealing with nonlinear equations, Since the induction motor is a complex electromagnetic reaction, the researchers used the ANSYS program to represent and analyze the performance of the motor under variable supply voltage. The case studied in this research is three phases, 380V, 50Hz, 2.2kW, induction motor that widely use in industrial application. The aim of this research is to study the effect of voltage variation on efficiency, current value, power factor and torque of SCIM. The RMxprt software has been used for modeling and simulating the induction motor and calculating the values of phases currents, input and output power in additional of overall efficiency at steady state condition. The next stage of the research is creating Maxwell 2-D design from the base model of RMxprt software, Maxwell 2-D model has the ability to computing the distribution of magnetic field and explaining the performance under steady-state operation. The obtained results show significant reduction of motor performance due to the effect of variation of apply voltage.

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Estimation of Stator Winding Temperature of a Three-Phase Induction Motor

Iraqi Journal of Computer Communication Control and System Engineering ◽

10.33103/uot.ijccce.19.2.2 ◽

2019 ◽

pp. 9-17

Keyword(s):

Induction Motor ◽

Stator Winding ◽

Squirrel Cage ◽

Software Methodology ◽

Software Packages ◽

Three Phase ◽

Network Method ◽

Thermal Network Method ◽

Motor Operation ◽

Good Agreement

This paper adopted a thermal network method (TNM) based on Motor-CAD with MATLAB/Simulink software, and finite element method (FEM) based on Motor- CAD with Flux2D software, to estimate the stator winding temperature of a totally enclosed fan-cooled (TEFC), squirrel cage, three-phase induction motor. The three software packages were adopted successfully with a good agreement among their results resulting in preferring using Motor-CAD in obtaining results, and using Flux2D with MATLAB to validate these results. The success of triple-software methodology will give the induction motor designer a well-validated tool in attaining a safe motor operation without exceeding the maximum allowable stator winding temperature rise, and without using an experimental test based on an expensive manufacturing motor.

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Thermal analysis of a three-phase induction motor based on motor-CAD, flux2D, and matlab

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v15.i1.pp48-55 ◽

2019 ◽

Vol 15 (1) ◽

pp. 48

Author(s):

Afrah Thamer Abdullah ◽

Amer Mejbel Ali

Keyword(s):

Thermal Analysis ◽

Induction Motor ◽

Heat Sources ◽

Squirrel Cage ◽

Software Methodology ◽

Precise Knowledge ◽

Three Phase ◽

Network Method ◽

Thermal Network Method ◽

Good Agreement

This paper adopted a thermal network method (TNM) based on Motor-CAD software, and Matlab/SIMULINK, with finite element method (FEM) based on Flux2D software to perform a thermal analysis of a totally enclosed fan-cooled (TEFC), squirrel cage, three-phase induction motor. The thermal analysis is achieved based on a precise knowledge of the test motor geometry, materials, and heat sources (losses). The estimation of heat distribution inside the test motor by this three software is done successfully with a good agreement between its results. The proposed triple-software methodology for this work can be adopted from the motor designer instead of using an experimental test based on a real motor.

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Induction Motor Monitoring System Base on Fuzzy Logic Controller

Journal of Electrical Electronics and Informatics ◽

10.24843/jeei.2020.v04.i01.p03 ◽

2020 ◽

Vol 4 (1) ◽

pp. 15

Author(s):

Prof. Rukmi Sari Hartati ◽

Ida Bagus Gede Manuaba ◽

I Made Mataram

Keyword(s):

Fuzzy Logic ◽

Induction Motor ◽

Monitoring System ◽

Fuzzy Logic Controller ◽

Supply Voltage ◽

Squirrel Cage ◽

Fuzzy Logic Method ◽

Motor Condition ◽

Condition Monitoring System ◽

Cage Induction Motor

Squirrel cage induction motor is an AC electric motor that is most widely used in industry. This type of motor is chosen because it does not have a commutation brush, and its construction is strong, so it can withstand large, easy flow surges for repair and maintenance. The problem that often occurs is the imbalance of supply voltage which causes motor efficiency to decrease. An imbalance of voltage will result in a current not equal. As a result of phase currents that are much larger than other phases result in an increase in temperature and speed on the motor. This research was conducted to monitor the induction motor so that it can determine the condition of the motor when receiving a voltage imbalance. The method used in the induction motor condition monitoring system is the fuzzy logic method. Parameters that can be monitored are categorized into three conditions: normal (good) motor condition, damage (serious) and serious damage.

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