Speed Adjustment to Achieve to Rated Output Power

The speed setup in all RMxprt-created Maxwell designs is the estimated rated speed, which is computed based on the rated output power using the Equivalent Magnetic Circuit (EMC) method in RMxprt. The EMC method may not be very accurate in some cases, especially when some part of the magnetic circuit is highly saturated. In order to obtain the correct rated performance in Maxwell designs, the RMxprt-based speed setup should be adjusted so that the simulated mechanical output power matches the specified rated output power.

For this purpose, all RMxprt-created Maxwell designs have an initial mechanical transient setup to automatically adjust the speed to approach the rated mechanical output power. This initial transient mechanical setup will be lost if you close the project without checking the Consider Mechanical Transient check box as shown in the following figure:

However, using the mechanical transient to reach to the rated output power may need much longer simulation time especially when the rotor moment of inertia is large. But reducing the value of the moment of inertia may cause speed oscillation.

The following two methods may be used to adjust the speed to achieve to the rated output power:

• Using the initial mechanical transient setup by RMxprt

• Adjusting speed manually for a constant speed setup

Related Topics 

Using the Initial Mechanical Transient Setup by RMxprt

Adjusting Speed Manually for a Constant Speed Setup