SPMSM SlotMagnet

The slot_magnet attribute of the Project.rotor corresponds to the Rotor Slot Magnet CheckPoint in the GUI. It is an instance of the SPMSM_SlotMagnetData class, which can be accessed through eMotorSolution.CheckPoints.Rotor.SPMSM_SlotMagnet.

In contrast to the IPMSM machines, the SPMSM machines hold only a single slot-magnet pair not a collection. The properties of the slot-magnet pair can be accessed directly from the slot_magnet_props attribute.

Parameters

• slot_magnet_props: One of the slot-magnet pairs bellow. Default is Slot M12.
• magnet_material_init: str The name of the magnet material. Default is NdFeB.

Slot-Magnet Pair

• Rectangular Magnet with Polar Top
• Rectangular Magnet with Curve Top
• Polar Magnet
• Polar Magnet with Curve Top
• Rectangular Magnet
• Ring Magnet
• Halbach Array

Methods

Method	Description
set_magnet_material(material_name)	Sets the material_name: str for magnet_material. It should be one of the magnet materials in the project's materials collection.
validate()	Returns the validation status in dictionary format.

Attributes

Attribute	Description
slot_magnet_props	An instance of the Slot-Magnet Pairs above.
magnet_material	str Returns the name of the magnet material. ⚠️ read-only
slot_magnet_type	str Get or set the type of the slot magnet.

Example Usage

Assuming that the project is a SPMSM one:

import eMotorSolution as ems

from eMotorSolution.CheckPoints.Rotor.SPMSM.SPM_SlotM19 import SPM_SlotM19Data

# Load the project
project = ems.load_project("path/to/your/project.json")

# Print the current Slot-Magnet
print(project.rotor.slot_magnet.slot_magnet_props)

# Assign new Slot-Magnet type
project.rotor.slot_magnet.slot_magnet_type = "Halbach Array"

# Get the current Slot-Magnet properties
halbach_array: SPM_SlotM19Data = project.rotor.slot_magnet.slot_magnet_props

# Assign new properties
halbach_array.set_H0(0.005)
halbach_array.set_W0(20)

project.show()

DXF-assisted User Defined Slot-Magnet

The SPMSM User Defined editor accepts DXF reference points and curves and maps them to the normalized Points, Connections, and Magnetization model. Match Unit to the drawing units and validate the closed magnet region before saving. Incomplete editing can be kept with Save Draft.