Magnet data

How to manage magnet parameters ?

Here is the list of user parameters related to the magnetic behavior of magnets.

Label Definition
T REF Reference temperature.
Br at T REF Remanent induction at T REF.
α Reverse temperature coefficient for Br.
μ r Relative permeability.
HcJ Intrinsic coercivity at T REF.
β Reverse temperature coefficient for HcJ.
(B.H) max Energy product. Disabled input field, value deduced from other inputs.
Hcb Normal coercivity at T REF. Disabled input field, value deduced from other inputs.
* Maximum operating temperature. Just for information, not used in computations.
* Curie temperature. Just for information, not used in computations.
Table 1. Presentation of the magnet family properties in “Materials”


1 Category dedicated to magnetic properties.
Note: Magnetic properties are linked to the data set in the “Operating Conditions” (See item 10 for “Operating”).
2 Input parameters are written in the input area.
3 Remanent flux density (Br).
4 Normal coercivity (Hcb).
5 B(H) curve for the magnet (in blue).
6 Intrinsic coercivity (HcJ).
7 Isoline (B.H) max. (in red).
8 Load line for the defined permeance coefficient (in green).
9 Operating point for the given permeance coefficient and temperature.
10
Temperature and permeance coefficient of the magnetic circuit are defined as “operating conditions” of the magnets. These can be edited in the dedicated tab “Operating”. Any changes will automatically update the output.
Note: These features have no influence on the magnet’s physical properties, but these are useful to display its behavior when working at this operating point.