Motor Magnet Kekal

A permanent Auto Chain magnet motor is a kind of brushless electric motor that uses long term magnets rather than winding in the field.

Motor jenis ini boleh digunakan dalam Chevy Bolt[1], Chevy Volt dan Tesla Model 3.[2] Pelbagai model Tesla lain menggunakan motor induksi tradisional.[3] Motor hadapan dalam pacuan semua roda Model 3 Teslas juga merupakan motor aruhan.

Long term magnet motors are better than induction engine or motors with field windings for several high-efficiency applications such as electric powered vehicles. Tesla’s Chief Motor Designer was quoted discussing these advantages, saying: “It’s well known that permanent magnet devices have the benefit of pre-excitation from the magnets, and therefore you involve some efficiency benefit for that. Induction devices have ideal flux regulation and for that reason you can improve your efficiency. Both make sense for variable-velocity drive single-gear tranny as the drive products of the cars. Therefore, as you know, our Model 3 includes a long term magnet machine now. The reason being for the specification of the overall performance and efficiency, the long term magnet machine better solved our price minimization function, and it was optimal for the number and performance target. Quantitatively, the difference is usually what drives the future of the machine, and it’s a trade-off between motor cost, range and battery cost that is determining which technology will be used in the future.
Medan magnet untuk mesin segerak boleh disediakan dengan menggunakan magnet kekal yang dihasilkan daripada neodymium-boron-besi, samarium-kobalt, atau ferit pada rotor. Dalam sesetengah motor, magnet ini dipasang dengan pelekat pada permukaan teras pemutar supaya medan magnet boleh diarahkan secara jejari merentasi jurang persekitaran. Dalam gaya lain, magnet dimasukkan ke dalam permukaan teras rotor atau dimasukkan dalam permainan mesin slot tepat di bawah permukaan. Satu lagi bentuk enjin magnet kekal menyediakan magnet terarah lilitan yang diletakkan dalam slot jejari yang memberikan fluks magnet kepada tiang besi, yang seterusnya mewujudkan medan jejarian dalam jurang aliran udara.