Aaron Williams, Arnold Magnetic Technologies' Engineering Manager, will speak about magnetic material selection at the upcoming Motor & Drive Systems Conference. The conference focuses on on the latest technical advancements impacting the design and integration of motor, drive systems and motion control for manufacturing, industrial and packaging, as well as automotive/EV applications.
Arnold Magnetic Technologies will showcase its high performance magnetic materials for the oil and gas market at next week’s SPE Artificial Lift Conference and Exhibition—North America. The conference focuses on case studies and best practices in artificial lift applications, primarily for unconventional shale developments.
Permanent Magnets Dominate EV
Vehicle electrification is a growing market for rare earth magnets. Consumption of rare earth magnets in transportation is estimated to rise from 7,000 tons in 2015 to 17,000 tons in 2020. Government mandates to reduce pollution, as well as high gasoline prices, are driving users to purchase more environmentally friendly vehicles. Permanent magnet machines are currently the leading choice for high performance automotive applications. The rotor’s well-balanced magnetic field and the lower stator current requirement, paired with very strong positional control, result in a higher motor efficiency. Two common choices for electric vehicle applications are neodymium magnets and samarium cobalt magnets, and each has its advantages.
Arnold’s Aaron Williams will give a presentation at the
(TechCon) in New Orleans in October. The presentation will discuss permanent and soft magnetic materials that improve performance in motor and generators.
Every type of permanent magnet has a unique set of characteristics that can affect how is performs in various applications. When evaluating magnet options for your project, pay attention to the following:
Smaller Motors, Bigger Design Challenges
Permanent magnet (PM) motors for EV applications have unique design challenges. As electric motors become smaller and faster, designers must consider the potential effects of electrical drive frequencies, magnetic eddy currents, laminated steel core loss, mechanical stresses on the quickly rotating shaft (rotor dynamics), and electrical control of the motor through the inverter.