In magnets, residual magnetic br refers to the magnetic induction intensity of the magnet after the magnetic field outside the magnet is charged to the technical saturation under the action of the magnetic field, and the magnetic induction intensity of the magnet is withdrawn; (magnet magnetic strength is not strong, mainly look at br) internal coercivity HCJ refers to the reverse magnetic field strength required to reduce the magnetization strength of the magnet to zero, (whether the magnet can continue to work at high temperature, how much temperature can resist, mainly depends on HCJ) magnetic energy product (BH) max refers to the product of B and H at any point of the demagnetization curve, and the maximum value of BXH is called the maximum magnetic energy product. (Comprehensive parameters, magnet selection mainly depends on BR and HCJ)
What kind of magnet should I choose for the motor?
This mainly depends on your application field, power, maximum operating temperature, and even original design experience.
Choosing the appropriate magnetic steel has an important impact on the performance and efficiency of brushless DC motors. Here are some suggestions for choosing magnetic steel:
1. Determine the magnetic properties of a magnetic steel: Magnetic properties refer to the degree of magnetization of a magnetic steel in a magnetic field. Generally speaking, the higher the magnetic properties, the better the performance of brushless DC motors. Therefore, choose magnetic steel with high magnetic properties as much as possible.
2. Consider the stability of magnetic steel: The stability of magnetic steel refers to the stability of magnetic properties under different temperature, humidity, and magnetic field conditions. Choosing stable magnetic steel can ensure the stability and long-term reliability of brushless DC motors in different environments.
3. Overall consideration of the price and effectiveness of magnetic steel: Different brands and materials of magnetic steel have significant price differences, but expensive magnetic steel may not necessarily be the best choice. It is necessary to comprehensively consider the price and performance of magnetic steel, as well as the specific requirements for application, and choose a suitable magnetic steel.
4. Pay attention to choosing environmentally friendly and healthy magnetic steels: With the increasing awareness of environmental protection and health, choosing environmentally friendly and healthy magnetic steels is becoming increasingly popular. Choose magnetic steel that meets environmental standards and does not contain harmful substances as much as possible to ensure the safety and health of brushless DC motors.