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Magnetic rotor, or permanent magnet rotor is the non stationary portion of a motor. An electric motor, generator, and other devices all include moving parts called rotors. Magnetic rotors are designed with multiple poles. Each pole alternates in polarity (north & south).
The rotating component of an alternator that moves permanent magnets around the iron plates of the stator to produce alternating current (AC) is called a rotor. Only until the engine or turbine is already operating will a Rotor interact with a Stator to give a charge as Rotors require existing motion to function.
The rotors’ principal role is to slow down the rotation of the car’s wheels by employing friction. When the brakes on your vehicle’s brake pads are compressed together by callipers, the brake rotor procedure takes place.
The Global EV Motor rotor magnet fixing materials market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
Mahle’s cheap, highly efficient new EV motor uses no magnets. The majority of electric car motors are composed mostly of magnets, which are frequently made of rare earth metals like neodymium. It’s good to have a persistent supply of intense rare earth magnetism in your rotor, but employing powered coils instead means somehow carrying current from the battery through to the coils in a spinning rotor. Therefore, a sliding point of contact is required, and sliding points of contact deteriorate over time.
Permanent magnets, though, come with their own baggage. Ninety-seven percent of the rare earth metals used in the world’s high-tech sectors are produced in China, and governmental control over this essential resource has historically been a significant problem. As is customary, official reports diverge as to why China choose to restrict rare earth shipments at the beginning of the decade, but the ultimate effect was a 750 percent increase in neodymium prices and a 2,000 percent increase in dysprosium costs.
China can use it as leverage in trade negotiations and as a real supply-line security concern for other nations. Several businesses, like BMW, Audi, Renault and others, are manufacturing at least part of their electric motors without magnets already; everyone else has their eye on new technologies in this area. And in that environment, the German manufacturer Mahle has recently unveiled a new electric motor that promises to neatly resolve a number of issues.
