International Student magnet systems are a relatively new way to arrange for travel between students internationally. Since the concept was first considered in the early 1970s, magnet motor technology has improved significantly. It has also gained popularity among researchers and students. With the recent advances in technology, permanent magnet motor engineering is reaching new frontiers with the use of stronger magnets and advanced electronics. This new approach to international travel via magnetic generators promises a number of advantages over traditional methods.
Design. Unlike many concepts proposed before, there is now a wide range of designs that include stator shells and non-stator shells. Large number of variations exist based on the strength of magnets used and other factors such as wind tunnel testing and feedback from actual field testing conducted at NASA. Most books on permanent magnet drive projects generally focus on the construction of the stator shell, offering only very elementary coverage of the core constructions. The core is the part of the machine that holds and produces the magnetic field and it is the part that must be carefully constructed to achieve acceptable performance.
Fig Tree Construction. The permanent magnet drive uses a simple yet efficient construction technique. A large number of designers choose to build a coil based on a simple series of circular discs. The innermost disc is placed inside an aluminum or steel stator shell. A series of small steel or aluminum discs then spin around this central core, creating a powerful energy source and a large range of power levels.
Control and Inspection. The machine must be designed so that both the input and output coils can operate effectively. The motor must have the ability to accurately determine the polarity of the magnet flow field, which will influence the overall performance and output. There is a wide range of performance testing methods that are available for sensors, such as PM Brushless and Inductively Coupled Plasma (ICP) tests. The method of test should be specified in the manual provided by the manufacturer or, if not, by a qualified technician.
A non-contact device such as a non-magnetic separator may also be used to prevent interference from other nearby conductors. A MIG welder or similar consumable consumables are used to open or close the metallic foils. After completing the test, it is important to compare the results with the data shown in the monitor. The values of the magnetization parameters must be consistent and should not fluctuate drastically from the average value. The frequency of operation of the motor should be just right and the magnetic fields should never become overly concentrated.
Field Testing. The electrical current generated by permanent magnets can generate vibrations that can damage sensitive machinery. Vibration testing is useful for measuring the amount of movement in the different components, such as fans and pumps. It can also determine whether or not the components are wearing down or becoming too hot.
Coiling. The electrical current generated by the motor depends on the wire size and the type of coating applied to the flat coils. The overall effect of the magnetic field produced by the coiled wire is the change in resistance across the individual coils. This measurement, known as a capacitance, is sensitive to any change in the magnetic field, which consists of a variation of the magnetic field induced by the metal core, and an electric current flowing through the wire.
Damping. The amount of damping caused by the applied force on the individual components of the stator, such as windings, is measured in torque. In some cases, the torque measurements will be completely separated from the permanent magnet damping results. This occurs when the force applied to the stator does not have a uniform strength across the magnetized field.