1. The motor is low in cost and light in weight.
2. The working conditions of wind turbines are relatively harsh, with relatively large vibrations. Motor magnets using permanent magnets are prone to magnet loss. With the improvement of technology, this problem is gradually being solved.
3. When using a doubly-fed motor, the frequency converter only needs 1/3 of the frequency conversion. A permanent magnet motor requires full-power frequency conversion, which requires a lot of additional costs. Taking 1.5MW as an example, the frequency conversion alone needs to increase The cost is more than 1 million.
4. There are already permanent magnet wind turbines, such as Goldwind and Xiangdian.