Introduction To The Material, Performance And Temperature Resistance Of Permanent Magnets in Ironless Motors

Introduction to the material, performance and temperature resistance of permanent magnets in ironless motors

 

The ironless motor is a DC permanent magnet servo control motor, which can also be divided into micro motors. The ironless motor has only a copper coil sealed with plastic film for the stator, and a permanent magnet for the rotor. The motor has no iron core and is easy to operate. Stable operation and other characteristics.

The coreless motor uses the slotless coreless coil as the armature winding, which pierces the iron core structure of the traditional motor, thereby greatly reducing the weight and moment of inertia, and fundamentally eliminating the eddy current loss of the iron core. The energy loss in the running process will be reduced. Coreless motors have become one of the development directions of motors due to their energy-saving performance, high sensitivity, control and operating characteristics, so the magnets of coreless motors have received extensive attention.

 

What magnets are used in ironless motors?

 

Sintered NdFeB magnets are generally used in ironless motors. They have excellent characteristics such as high remanence, high coercive force and high magnetic energy product. They are the most suitable permanent magnet materials in the market to meet the requirements of ironless motors. In terms of motor size and In the case of the same winding data, the strength of the magnet directly affects the speed of the motor. Common neodymium magnets suitable for coreless motors are cylindrical and ring-shaped. The performance is commonly used in N40, N42, N45, etc., and the temperature resistance is about 100°C.