Gaussmeters are used to measure the magnetic field density at the surface of the magnet. This is referred to as the surface field and is measured in Gauss (or Tesla). Pull Force Testers are used to test the holding force of a magnet that is in contact with a flat steel plate. Pull forces are measured in pounds (or kilograms).
Optimization Design of Permanent Magnetic Mechanism in High Magnetic Field
The permanent magnets with high field intensity are used in medical systems,military affair and high-energy physics fields.They are usually electromagnets or superconductor magnets at present.If we design the size of the permanent magnetic mechanism properly,there will be much higher magnetic field than its remanence in the center,and it can replace the superconductor magnet and electromagnet.So with the development of properties about permanent magnetic material,the optimization design of the permanent magnetic mechanism with high magnetic field must develop well in the future in the magnetic field.
There is a kind of special permanent magnetic mechanism permanent magic ring which is made up of permanent magnet blocks.Their magnetized direction changes equably.In the assembly complex process, the permanent magnet blocks with different magnetized direction will impact each other, and might bring the local demagnetization or saturation.So the work point of permanent magnetic material might be at the whole hysteresis loop including minor hysteresis loop.The traditional method only considers the demagnetized curve of the magnetic material, so inevitably there are some errors in simulating the magnetic characteristic in the high magnetic field.