Dec 08


In this issue

» Using MotorSolve for Electric Machine Design
» Electric Machine Design Workshop for Aerospace Applications
» BLDC Motor Design: Cooling and Thermal Considerations
» Advances in Simulation Technologies for Multi-physics based Design, System Level
   Simulation and Control of an Induction Motor for Traction Applications

» Analyzing a Loudspeaker’s Voice Coil Response to a Signal
» TEAM problem 24 – Nonlinear Time-Transient Rotational Test Rig
» Actuator with Diode
» Simulation of an Electrostatic Precipitator

Webinar: Using MotorSolve for Electric Machine Design


Date and Time: January 12, 2012 at 2:00 pm, EST (GMT-5:00)

During this free one hour webinar, watch as one of our application specialists highlight the new features in MotorSolve v2.6.

We will also demonstrate how to use MotorSolve to tackle many aspects of the electric machine design process: sizing, winding configuration, material selection, losses/efficiency and reviewing the performance results.

synchronous reluctance<br />

There will also be a preview MotorSolve v3.0 and the new thermal analysis module, our latest update to the software due out shortly.

This webinar is interactive – put forth your own questions to our application specialist and learn more about our automated FEA-based electric motor design software.

Electric Machine Design Workshop for Aerospace Applications

February 27-29, 2012
Sheraton at Los Angeles, CA

Join Jim Hendershot, renowned electric motor expert, for a three day workshop on machine design for aerospace applications. The focus will be on tips and useful techniques for approaching your next aerospace related motor project. An ideal event for suppliers to the industry as well.

Detailed discussions of typical design criteria including:

  • Magnetic material selection for active magnetic components based upon performance requirements and operating environments
  • Selection of number of poles and stator slots
  • Magnetic core design procedure including lamination design
  • Rotor design using magnets or copper conductors including high-speed rotor retention
  • Machine loss analysis to identify and source, thermal diffusion path reduction techniques
  • Cooling or heat extraction study with thermal analysis & temperature rise predictions


BLDC Motor Design: Cooling and Thermal Considerations

Pre-conference workshop at Motors, Drive and Automation Systems 2012
March 12, 2012
$595 USD until February 10, 2012
$695 USD after

This full day event will cover a broad range of topics and cover useful techniques and tips on how to approach your next motor project. The workshop will focus on practical problems faced by real designers in their work environment, including what to do as the motor heats up. Jim Hendershot will discuss the design process based on the motor specifications provided by the attendees and guide you through the process of obtaining a motor that meets the requirements.

Design specification: detailed discussions of typical design criteria including required power, efficiency, drive configurations, size constraints and possible cooling methods.

Getting an initial design:

  • Sizing of the motor using analytic and other methods
  • Rotor and stator configurations
  • Air gap shear stress based on outer and inner diameters
  • Magnet and lamination material selection
  • Loss and efficiency considerations; Ohmic, hysteresis and eddy current losses
  • Winding types and design; lap/concentric windings, balanced windings and winding factors
  • Predicting temperatures
  • Cooling configurations

Advances in Simulation Technologies for Multi-physics based Design, System Level Simulation and Control of an Induction Motor for Traction Applications

Free Exhibitor Seminar at APEC 2012
February 7, 2012 at 1:30pm in room Coronado E/F

An integrated design process for electromagnetic, thermal, power electronics and control system design for a traction motor application: the electromagnetic and thermal design of the 70 KW induction motor model is carried out by implementing a series of typical motor design steps. A final machine model will be achieved through design iterations that will be based on design performance analysis such as the torque-speed characteristics of the machine, output power and efficiency calculations. These will be calculated using Infolytica’s software.

The control system design and integration of the induction motor is performed within the Saber Physical Modeling and Simulation Environment from Synopsys, Inc. This example illustrates an indirect field-oriented control scheme that uses space vector PWM modulation to drive a 3-phase inverter. The closed-loop control system is modeled with a combination of both VHDL-AMS and MAST descriptions of constituent blocks, at a level of fidelity that permits accurate evaluation of controller performance in start-up, low speed, and full speed modes of operation.

Updated Design Examples

We have recently updated some of the design examples posted on in order to better reflect the functionality available in MagNet, ThermNet, ElecNet and OptiNet version 7. 

Take a look at these refreshed examples to see new field plots, animations, sample models and results!

Analyzing a loudspeaker’s voice coil response to a signal

In this example, we have analyzed the voice coil response to a signal by using the 2D Transient with motion solver. The solver includes coupling to the mechanical equations of motion, so that the movement of a component of a device (for example, the movement of the voice coil) is accurately simulated. The mechanical effects can include friction, inertia, mass, springs, gravitation, etc. 

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TEAM problem 24 – Nonlinear Time-Transient Rotational Test Rig

This example shows a nonlinear transient problem, which was solved by MagNet’s Transient 3D solver. This device is number 24 in the TEAM series of benchmark problems, and published experimental measurements are available for comparison. The problem was designed to be similar to a switched reluctance machine. Each stator pole has a 350-turn coil around it, and the rotor is fixed at 22 degrees relative to the stator. A step voltage of 23.1 V is applied to the series connected coils. A search coil is wound around a rotor pole to measure the total magnetic flux, and a Hall probe measures the y-component of the magnetic flux density at a specified position in the air gap between rotor and stator. Finally, a piezoelectric transducer measures the torque on the roto 

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Actuator with Diode

This actuator example demonstrates the power of a fully integrated MagNet’s Transient 3D with motion solver which simultaneously solves the circuit equations, the field equations on the finite element mesh, and the equations of motion. All three sets of equations include some sort of non-linearity. For the circuit the non-linear element is the diode. The finite element solver must deal with non-linear magnetic materials, and the motion solver handles the instantaneous reversal of velocity, which occurs when the plunger bounces off a bumper. 

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Simulation of an Electrostatic Precipitator

Electrostatic precipitators are widely used in various industries to control emission levels. These are particulate collection devices that remove particles from a flowing gas using the force induced on ions. Using ElecNet with the particle trajectory tracking tool, it is possible to carry out realistic design and simulations of engineering devices such as the electrostatic precipitator. 

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