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MotorSolve IM: finding solutions to a wide variety of induction motor design and simulation problems
MotorSolve IM offers four types of analysis options; Equivalent circuit based analysis, AC analysis, PWM and Motion analysis. At different degrees of approximation, complexity and utility, they offer solutions to a wide variety of induction motor design and simulation problems. In this application page, some simple examples of the utility of these methods are presented.
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Equivalent Circuit Analysis in MotorSolve IM: computing the lumped parameters of induction machine models
MotorSolve IM performs no-load saturation, locked-rotor and impedance test simulations to evaluate the circuit parameters. The tests are based on FEA solves and include accurate estimation of core losses. In this analysis mode, computation of the lumped parameters allows the user to specify the leakage ratios between the rotor and stator. This example demonstrates the equivalent circuit based analysis of a 17 bar - 24 slot machine.
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Motion analysis in MotorSolve IM: FEA-based dynamical simulation
When induction machines operate under magnetic saturation, analytic approximations are unable to accurately predict performance. Fine changes may also be very difficult to model analytically. Hence, at this stage, FEA based analysis is usually the method of choice by machine engineers. An automated FEA-based dynamical simulation option has been included in MotorSolve IM for this purpose. This application page provides some details of this analysis option along with some examples.
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PWM analysis in MotorSolve IM: gauging the performance of induction motors for realistic drive circuits
Motors and generators The PWM feature of MotorSolve IM is designed to assist the machine engineer to gauge the performance of induction motors for realistic drive circuits. To this end, 3-phase bridge circuits with delta and space vector modulation (with Wye/Delta connection) options are offered that allow the user to calculate a large array of entities and compare results with ideal drive simulation. The methodology and some examples of results using PWM simulations are presented in this application page.
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AC analysis using MotorSolve IM
MotorSolve IM AC analysis type takes into account regions of linear and nonlinear behaviour of the lumped parameters and automatically adapts to such variations with extra sample points in such regions of the parameter space. Variations of the lumped parameters at various slips are also taken into account. Some calculations for a 17 bar - 24 slot squirrel cage induction machine are presented.
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Overview of MotorSolve IM for Induction Motors
MotorSolve IM is a comprehensive tool within which modeling, design iteration and design validation can be carried out for induction machines. To facilitate this, user friendly and powerful modeling features as well as multiple types of analysis options of varying degrees of approximation and complexity have been implemented. These include equivalent circuit based analysis, AC analysis, PWM and dynamical motion simulations. Provided below is a summary of MotorSolve IMs' modeling and analysis capabilities.
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Iron Loss Calculations in Laminated Structures
Most core loss calculation approaches apply Epstein frame data neglecting a number of significant factors such as drive types and differences between flux density. MagNet takes into account the histories of flux density in various parts of the machine, the drive type and separates the loss sources at the component level. Using the example of an interior permanent magnet motor, this novel approach is demonstrated.
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Iron loss separation - trends in high-torque BLDC Motors
Using MotorSolve BLDC, the iron loss trends in a high-torque BLDC motor with respect to electrical loading, drive types (sinewave and six-step drive) and rotor back iron depth are computed. The need for FEA based analysis is demonstrated here, as well as a simple application of the results that helps the engineer set electrical loadings for this machine.
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