Magnet fixing refers to the method of attaching magnets to the rotor or stator of an electric motor. This is a critical step in the motor manufacturing process as it determines the stability and reliability of the motor. There are several different ways to fix magnets in place, including:
Adhesive bonding: This involves using an epoxy or other type of adhesive to attach the magnets to the rotor or stator. This method is popular because it is relatively simple and inexpensive.
Press-fitting: In this method, the magnets are placed in a machined groove in the rotor or stator and then pressed into place using a hydraulic press. This method provides a more secure hold, but can be more challenging to implement.
Welding: In some cases, the magnets can be welded directly to the rotor or stator. This method provides a very strong hold but requires specialized equipment and expertise.
It's important to choose the right method for fixing the magnets, depending on the specific requirements of the motor and application. Factors to consider include the strength and stability of the magnet attachment, the operating conditions of the motor, and the manufacturing process.
While we are active in the resin fixing field we also suggest other options that are similar to theat, namely epoxy molding encapsulant. It is melted and poured into the gaps and then it solidifies, keeping the magnets in place. EMC have great corrosion resistance and are a great alternative for liquid encapsulation
HysolEM 300T-KL is the perfect solution for protecting and securing your electric motor's magnets. This black, rotor magnet encapsulant is being used in the automotive, eMobility industry as an alternative to traditional resin fixing techniques. It claims a very low CTE, High Tg, and good and reliable encapsulation. It has 70% filler content and is based on OCN/MAR chemistry with a PN hardener.