The invention has the advantages that: 1. the Curie temperature of the magnet is over 450 DEG C, which is enough to meet the requirement for operation temperature rise of the elevator tractor;
本发明的优点体现在：1。磁体的居里温度大于450 摄氏度，足以抵抗电梯曳引机的工作温升要求；
2
Quantitative Determinding the distribution of magnetic field of permanent magnet brushless d. c. motor, is very important to analyze its properties.