Choice of polarization
1. Polarization coordinate system
Two coordinate systems are available:
A “ Global ” polarization coordinate system: The origin is positioned at the rotor center.
A “ Local ” polarization coordinate system which is specific to each considered magnet topology.
Note: The reference axis (Xaxis for Cartesian coordinate system) has a red color.
2. Polarization orientation
Five strategies of polarization are proposed:

Direction

Radial +, Radial –

Orthoradial +, Orthoradial –
3. Polarization orientation illustrations

1  Global coordinate system. The origin is positioned at the rotor center.
The reference axis is the Xaxis. Its color is red. 
2  Local coordinate system. Its location is defined for each magnet
topology. See “Part Factory” application for more information. The reference axis is the Xaxis. Its color is red. 

3  Borders of part sector in which magnet topology is defined.  
4  Magnet in which a point P is considered to illustrate the polarization orientation.  
5  Polarization of the magnet considered at any point P.  
Legend of pictures to illustrate the magnet polarization orientation 


Polarization / Radial + / Global coordinate system  Polarization / Radial – / Global coordinate system 


Polarization / Orthoradial + / Global coordinate system  Polarization / Orthoradial – / Global coordinate system 


Polarization / Radial + / Local coordinate system  Polarization / Direction + Angle / Local coordinate system 