Laminated Flux Concentrator

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Description

These are soft ferromagnetic core featuring superior material characteristics such as high linearity and very low hysteresis. The core is designed for high-speed contact less current sensing in combination with a magnetic field sensor, i.e., Hall sensor, and a current conductor. Furthermore the core protects the sensor from parasitic magnetic fields caused by nearby conductors or other magnetic field sources. These parts are used for contact less very low current sensing applications. They are widely used in sensitive electric measuring instruments for concentrating small magnetic flux generated in an electromagnetic circuit. These parts are a stack of lamination. This stacks can be die-stacked & auto-stack.They can be made in customer specific thicknesses by using different no. of lamination.

Magnetic Characteristics

Flux Concentrator Magnetic Characteristics
Parameter	Typical Value	Unit
Curie Temperature	450	degC
Maximum Relative Permeability	100000	a.u.
Initial Relative Permeability	7000	a.u.
Saturation Flux Density	1.5	T
Coercivity, Hc	2.8	A/m

Material Grades :

NiFe 48%
NiFe 80%
NiFe 48% & 80% combination
Low core loss Silicon Iron

Material Thickness:

They can be made in customer specific thicknesses by using different no. of lamination. Minimum 0.2 mm & Maximum up to 1 mm.

Features :

High magnetic permeability
Low hysteresis loss
High linearity
Con-tactless current sensing: 1 Amp - 1000Amps
High speed / Short response time < 2 micro second
Based on melexis hall sensor or any reputed hall sensor

End Applications :

Automobile
Electricity meter

Why PML?

Ability to deliver mass production quantities finally pure hydrogen heat treated.
Carbide Auto stacking tooling used for production on highly accurate imported high speed press.
Samples for concept testing provided made by low cost prototype tooling or even by wire cutting.
PML collaborates for current sensor application with Maglab (representative & development Partner) and Melexis. Maglab (representative & development Partner) is an engineering company interfacing the design of the current sensor based on Melexis Hall-Sensors and PML magnetic cores/shields. Melexis is an automotive qualified sensor supplier.
Dimensions functionally critical like gap & stack perpendicularity, Symmetricity, Concentricity is achieved in tolerance range of 0.02 to 0.04.
Ability to check the core material in a ring shape or close loop shape by plotting hysteresis loop.
Ability to test the outgoing core performance at desired current & desired frequency. Frequency can be up to 50 KHz. Hence we can generate simulation as per the actual application.