The start angle and end angle of the rotor is set here along with the number of steps. These are in mechanical degrees. If the end angle is equal to 360 electrical degrees, it will be a duplicate point as it is the same as 0 electrical degrees. So it is advisable to reduce the number of steps by 1 and to set the appropriate end angle to be less. For example, if 45 steps are required from 0 to 180 mechanical degrees in a 4 pole motor, the settings for the end angle can be 176 mechanical degrees with 44 steps. This has to be done manually.

Samarium supports parallel processing and this has to specifically be enabled. The maximum rotor position solutions computed in parallel is four at this time. To use multi-run, the Enable multi-run check box has to be enabled. Depending on the settings, multi-run can take several hours. None of the data is stored in the hard-drive, all data resides in memory, this limitation is being worked on. Please use with caution and set the parameters such that Samarium does not use all the RAM and start disk swapping as this will slow down Samarium such that it may never converge.

The below animation was simulated by using the Red hot color map with only 8 sub-colors to bring out the variations in the magnetic flux density. Partial motor model option has been enabled. A third party software was used to create the gif format file from a 2nd order multi run of 180 mechanical degrees with 4 mechanical degree steps. Samarium does not have the capability of generating animations at this time. The fields outside the stator OD and in the winding area have been hidden.

Multirun rotation

The animated graph below shows the air gap flux density distribution at each of the rotor positions of the animation shown above.

Radial component of air gap flux density is plotted [Bn]