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Magnetising Equipment
Bunting’s magnetising equipment is excellent for use in both laboratory and industrial environments. We offer industrial magnetisers, bench top and laboratory magnetisers, magnet setters, and custom built magnetising systems designed to suit your exact needs.
Industrial Magnetisers
Bunting’s standard range of industrial magnetisers were originally designed to meet the higher energy demands of some of the more complex industrial applications. They have a modular construction which allows these magnetisers to be supplied with a wide range of energy levels with different voltage and capacitance configurations depending on the application, as well as with multiple magnetising fixture outputs. They are PLC controlled and can be interfaced with customers’ own production systems. These magnetisers are suitable for most industrial applications: from simple 2 pole fixtures to high energy multi-pole magnetisation such as flywheels, permanent magnet rotors, or traction motors.
Key Benefits: • Rugged industrial design. • Modular construction for a wide range of energy levels. • Voltage and capacitance can be optimised for slow or fast pulse waveforms. • PLC controlled with remote LAN access for maintenance or production control. • Multiple fixture outputs for more flexible operation.
Specifications: • Power Supply: 3 Phase, 400V, 20A • Standard Output Voltages: 800V, 3000V, or 5000V • Discharge Energy: up to 100kJ • Maximum Peak Current: ~35kA • Charge Rate: 6kJ/s • Standard PLC Controller Siemens s7-1200
Typical Applications: • Large NdFeB/SmCo blocks • Loudspeaker magnet assemblies • Permanent magnet rotors • Traction motor assemblies • Flywheel rotors • Magnetic bearings
Bunting’s BLMC series is ideally suited for laboratories or other small-scale production environments. These magnetisers have a workbench area on top of the unit where the fixtures are placed for operation and either hard wired in for permanent installations or connected by quick release plugs in the case of environments where many different fixtures may be used. They can be fitted with a standard push button control panel or with an HMI interface if preferred.
Standard safety interlocks are included to prevent fixtures from being operated when over temperature. For situations where multiple magnetising fixtures may be used, additional safety interlocks are recommended. The process of setting individual fixture parameters can be automated such that all the operating parameters are stored in the fixture control plug, which once connected to the magnetiser automatically sets the machine ready for production. This prevents fixtures from ever being operated at too high a voltage or when over temperature, which in turn prevents damage to the magnetising fixture. These magnetisers are ideal for magnetising small multipole magnets up to diameters of approximately 50mm, as well as being well suited for fine pitch magnetisation as well as more general 2 pole magnetisation of most permanent magnet materials, including rare earth materials.
Key Benefits: • Ideal for laboratory/small scale production. • Desktop/workstation design. • Quick release fixture outputs for highly flexible operation. • Extensive safety interlocks protect you and your equipment. • Optional automated fixture setting feature • PLC controlled with remote LAN access for maintenance or production control.
Specifications: • Power Supply: 110Vac/230Vac. • Standard Output Voltages: 3000V. • Discharge Energy: 1 – 4kJ. • Maximum Peak Current: ~20kA. • Charge Rate: 500J/s. • Standard PLC Controller Siemens s7-1200.
Typical Applications: • Small NdFeB/SmCo magnets. • Ferrite and AlNiCo magnets. • Multipole rings or rotors up to ~50mm. • Encoder/sensor magnetisation.
Bunting offers a range of magnet setters for use in magnetising and setting permanent magnets. These machines utilise capacitor discharge technology to generate either a pulsed magnetising or demagnetising field inside the fixture bore. In the “Mag” mode, the machine will deliver the full charge to the magnetising fixture. In the “Demag” mode, the polarity of the magnetising field is automatically reversed, with the level of demagnetisation controlled by the dial on the control panel.
Used in conjunction with a suitable magnet measurement system, these magnet setters can be used to calibrate a magnet to a specific working point.
Features: • Voltage range 0-1000V. • Energy 100-200J. • Mag/Demag operating modes. • For production or laboratory use. • Optional dual fixture outputs. • Optional automatic calibration.
Available Options with Standard Machine:: • Digital display of voltage set point. • Two fixture outputs. • Automatic calibration.
Magnetising Systems: Bunting offers custom built magnetising systems, including automation. Examples include: • Multipole Surface Mounted Halbach Rotors—
Post Assembly. • IPM Machine Rotors + Skewing. • Passive Magnetic Bearings—Internal and
External. • Bespoke Magnetic Field Generation, including magnetic modelling.
Magnetising Fixtures
Bunting offers a wide variety of magnetising fixtures in varying sizes and strengths to best suit your application. Our fixtures are designed to best utilise the availability of your magnetiser depending on the material you are working with. We are also able to provide complex multipole/ Halbach field distributions in order to create a specific magnet for your application.
Available Fixtures
Single Axial Solenoids Fixture: Generate a 2 pole field along the length of the coil and are suitable for magnetising all 2 pole magnet materials.
External Radial Multipole Fixtures: Designed to produce a multipole radial field on the external diameter of a ring magnet or magnet assembly such as a permanent magnet rotor.
Internal Radial Multipole Fixtures: Designed to produce a multipole radial field on the internal diameter of a ring magnet or magnet assembly such as the rotor of an exterior rotor permanent magnet machine, permanent magnet stators, or flywheels.
Axial Field Multipole Fixture: Designed to produce a multipole axial field on the face of a ring, disc, or block magnet.
Homopolar/Radial Fixture: Designed to produce a single radial pole on the inner and outer diameters of a ring magnet.
Multi Pole Circumferential Fixture: Specifically designed for applications such as encoders and sensors with specific requirements, such as pole pitches less than 3mm or multiple sensor tracks on a single component.
Prototype Magnetising Fixture: To avoid the cost of a production magnetising system, Bunting can build prototype fixtures which will be magnetically the same as a production unit, but may be manufactured from less hard wearing materials and will be without all the cooling and normal fixture interlocks. These fixtures are ideal for research and product development. Low volume sample runs and fast turnaround times are available.
