Lamination

Laminations - Data

Here are the properties needed to define a new lamination:

Category	Label	Unit
Description	Name	*
	Family	*
	Author	*
	Manufacturer	*
	Memo	*
Economic	Price	USD/kg
Mechanical data	Sheet thickness	mm
	Stacking factor	1
	Mass density	kg/m3
	Young modulus	N/m2
	Poisson ratio	1
Magnetic data	Relative permeability	1
	Magnetic polarization at saturation Js	T
	Relative permeability	1
	Knee coefficient	1
Iron Loss	Hysteresis loss coefficient (kh)	1
	Exponent of B for the hysteresis losses (αh)	1
	Exponent of f for the hysteresis losses (βh)	1
	Classical loss coefficient - Sine wave (kc x kαc)	1
	Classical loss coefficient - Any wave (kc)	1
	Exponent for the classical losses (αc)	1
	Excess loss coefficient - Sine wave (ke x kαe)	1
	Excess loss coefficient - Any wave (ke)	1
	Exponent of B for the excess losses (αe)	1
Thermal data	Reference temperature - Tref	°C
	Thermal conductivity in the lamination direction at Tref	W/K/m
	Thermal conductivity in the lamination insulation at Tref	W/K/m
	Equivalent thermal conductivity in the lamination depth at Tref	W/K/m
	Specific heat at Tref	J/K/kg

Note: The B(H) curve is defined with an analytical model given in the Advanced section: Create a B(H) curve.

Note: A stacking factor is considered to define the B(H) curve to analyze the behavior of the magnetic circuit of the machine.

The user must define the magnetic characteristics of the solid material while the magnetic characteristics of the lamination stack are automatically deduced considering the value of the stacking factor.

See Advanced section: Create a B(H) curve.

Note: Electric properties are defined via iron loss model.

Note: Iron losses are defined with an analytical model given in Advanced section: Define iron loss parameters.

Note: The thermal conductivity “in depth” along the stacking direction: K _d is computed as follows:

S _f	Stacking factor
K _ins	Thermal conductivity of the lamination insulation
K _lam	Thermal conductivity in the lamination

Note: The thermal conductivity of laminated regions is constant whatever is the temperature of the region.