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Magnetizing guide Bonded Neo Magnetization Guide Dr Nimit Sheth Christopher Foo and David Miller Magnequench Technology Center Singapore CPresentation Outline Magnetizing Systems Fixture Design Construction Testing Design Study Magnequench -All Rights Res

Bonded Neo Magnetization Guide Dr Nimit Sheth Christopher Foo and David Miller Magnequench Technology Center Singapore CPresentation Outline Magnetizing Systems Fixture Design Construction Testing Design Study Magnequench -All Rights Reserved A Division of Neo Material Technologies Inc CMagnetizing Systems ? A typical magnetizing system consists of a magnetizer and a ?xture One magnetizer is suitable for many di ?erent applications while a ?xture is usually custom made for each application ? Magnetizing may be performed at many points in the manufacturing process magnet magnetic sub-assembly or fully assembled product ? Fixture designs range from simple solenoids to very complex multi-pole arrangements ? For best results magnetization should be considered when designing an application Magnetizer Magnetizing Fixture Applications requiring magnetization Magnequench -All Rights Reserved A Division of Neo Material Technologies Inc CMagnetizing Systems Magnetizer The Magnetizer is the power supply of a magnetizing circuit A single magnetizer may be suitable for many di ?erent applications Types of magnetizers include ? Capacitive discharge ? Half cycle ? Permanent magnet No Power Required Capacitive discharge magnetizers are the most common and are speci ?ed by ? Maximum operating voltage ? Maximum capacitance ? Special options Important Magnetizers which magnetize ferrite sometimes do not have enough energy to fully magnetize bonded Neo Magnequench -All Rights Reserved A Division of Neo Material Technologies Inc CMagnetizing Systems Fixture Fixtures are generally application speci ?c and are speci ?ed by ? Magnet material ? Magnet material orientation ? Magnetization orientation ? Number of poles ? Magnet geometry ? Cycle rate water cooling for faster rates ? Magnet calibration if desired Magnequench -All Rights Reserved A Division of Neo Material Technologies Inc CMagnetizing Systems Fixture Fixtures can be designed for many types of pole con ?gurations Axial Diametrical Surface magnetization Uni-polar radial Multi-pole axial Outer-diameter Halbach Magnequench -All Rights Reserved Inner-diameter Halbach A Division of Neo Material Technologies Inc CMagnetizing Systems Fixture Fixtures can be integrated into automated part handling systems Possibilities include ? Fully automated magnetization ? In-line testing quality check ? Calibration ? Safety Features Magnequench -All Rights Reserved A Division of Neo Material Technologies Inc CMagnetizing Systems RLC Circuit When a magnetizing ?xture is coupled to a capacitive discharge magnetizer the system forms an RLC circuit Magnequench -All Rights Reserved A Division of Neo Material Technologies Inc CMagnetizing Systems RLC Circuit The RLC circuit of the magnetizing system results in a half-sinewave current pulse in the copper wire windings of the ?xture Conventional pulse widths are to milliseconds Amperes per mm Lower impedance systems allow for higher peak currents due to their shorter pulse widths milliseconds Conventional Magnetizing High-Current Ultra High-Current Magnequench -All Rights Reserved A Division of Neo Material Technologies Inc CMagnetizing Systems RLC Circuit Typical Current Pulse Fixture for OD magnetization of -pole mm diameter ring Magnequench -All Rights Reserved A Division of Neo Material Technologies Inc CPresentation Outline Magnetizing Systems Fixture Design Construction Testing Design Study Magnequench -All Rights Reserved A Division of Neo Material Technologies Inc CMagnetizing Fixture Design Magnet Orientation