A new feature in MotorSolve version 6.0 automatically calculates the skew on the stator lamination which is necessary to achieve zero cogging torque.
Given a machine such as shown below :
Figure 1 : 24 slot, 20 pole Brushless IPM Machine
MotorSolve uses the Duane Hanselman relationship to predict the skew which will produce zero Cogging Torque.
Figure 2 : The predicted skew value
The Stator input editor then allows one to enter the predicted skew as shown in Figure 3.
Figure 3 : Setting the corresponding skew for the Stator Lamination
Figure 4 below shows the original Cogging Torque which was computed by MotorSolve without skew. The peak of the Cogging Torque is nearly 2 ft-lbs.
Figure 4 : The Cogging Torque without skew
Figure 5 below shows the Cogging Torque which was computed by MotorSolve with the predicted skew in place. The Torque is effectively zero.
Figure 5 : The Cogging Torque with skew
Figure 6 below shows the Cogging Torque which was computed by MotorSolve with the predicted skew in place. The scale on the Torque axis has been adjusted by 5 orders of magnitude to show that indeed the resulting Cogging Torque is zero.
Figure 6 : The Cogging Torque with skew [zoomed in scale]
Pricing and Availability
MotorSolve v6 is now available for Microsoft Windows 7, 8 or 10. For information about the full list of improvements, request a demo, quote or full feature evaluation, please contact an Infolytica Corporation representative nearest you.