HyMpulse – measure demagnetization of free form samples

The HyMpulse is an hysteresisgraph for advanced permanent magnets. It measures free form samples (i.e. your end product) made from high coercivity material (up to 40 kOe)

HyMAC - AC magnetic measurement of electrical steel

The HyMAC is a magnetic measurement platform for BH curves and AC losses. It can cope with a wide range of sample geometries (Epstein, strip, sheet, toroid ...) and sizes

CDMM - Magnetizers and Fixtures

Custom solution for magnetizing large and small assemblies, including handling and quality control. Experience with different magnetizing techniques allowing rapid prototyping.

Bridging the gap between open-loop and closed-loop hysteresis measurement system for permanent magnets

It is becoming accepted that open-loop and closed-loop yield the same results for the key parameters of a hysteresis trace: Br; HcB, HcJ and BHmax. An international round-robin organized by the IEC comparing pulsed field magnetometers and conventional systems with electromagnets confirmed this [TR 62331]. A comparison of both systems was given at Magnetics 2017.
It is established that measuring the BH curve of permanent magnets with open-loop and closed-loop measurement system yields the same results for the key parameters of a hysteresis trace: Br; HcB, HcJ and BHmax [see IEC report TR 62331].
Beyond these 4 key parameters, there exists small differences between the two measurement systems. This presentation will focus on these differences from the theoretical point as well as highlight some practical cases.
From the theoretical point, it is recognized that small differences can be observed near the knee point. Our efforts show that this can be accounted for using simple numerical techniques.
It is established that measuring the BH curve of permanent magnets with open-loop and closed-loop measurement system yields the same results for the key parameters of a hysteresis trace: Br; HcB, HcJ and BHmax [see IEC report TR 62331].
Beyond these 4 key parameters, there exists small differences between the two measurement systems. This presentation will focus on these differences from the theoretical point as well as highlight some practical cases.
From the theoretical point, it is recognized that small differences can be observed near the knee point. Our efforts show that this can be accounted for using simple numerical techniques (Magnetics 2018).

Metis delivers magnetizing solution for PMG for wind energy

With the shift toward permanent magnet generators, manufacturers are looking for adequate tooling in order to properly handle permanent magnets. Conveniently, these permanent magnets are charged at the latest possible stage in the production process. The magnetizing solutions for wind mill generators are opening up new manufacturing possibilities.
Metis Instruments recently delivered an automated magnetizing solution to a leading manufacturer of wind power generators; on this occasion a completely autonomous production unit for rotors with variable length was installed. The challenge was to deliver a unit that would eliminate the need to handle charged permanent magnets during the production with a limited transit time.
The concept of the production unit for fast rotating machines would allow handling multi-pole rotors with a diameter less than a meter. To make the unit suitable for medium speed machines, with rotor diameters up to two meter, some modifications need to be implemented.
For the flexibility, the machine will magnetize the rotor in parts, in axial slices as well as circumferential. On a selected part of the rotor, a strong magnetic field will be applied for magnetizing the permanent magnets with the correct polarity. The yoke includes magnetic sensors for post-operation quality control of the flux profile.