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Contour plot animation of the flux function Shaded plot animation of the flux density field Shaded plot animation of the current density field

Three-phase induction motor startup (T.E.A.M. Problem 30A)

Motors and generators with MagNet

This is an example of a three-phase induction motor. In MagNet, this IM is simulated and analyzed using the Transient 2D with Motion solver. The method and results presented here displays the characteristics of the machine during startup. In this analysis, no load or friction is specified.

The following is based on the Testing Electromagnetic Analysis Methods (T.E.A.M.) problem #30A: Induction Motor Analyses. The benchmark can be found on the International Compumag Society's website.

Three-phase induction motor problem

METHODS and RESULTS

DISPLAYING the TORQUE at STARTUP

The torque/time graph shows the initial transient that takes place and the way the torque changes as the rotor speeds up. The torque then reaches the maximum before dropping to zero at synchronous speed.

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FROM ZERO to MAXIMUM ATTAINABLE SPEED

The speed/time graph shows the speed of the rotor increasing from zero at start to the maximum attainable speed when the machine is running at synchronous speed.

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COMPARING MEASURED & SIMULATED TORQUE vs. SPEED

This graph compares the torque vs. rotor speed measured (from T.E.A.M. problem 30A) and MagNet's simulation results.

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