Not long ago, with the electric vehicles of well-known domestic car companies such as Geely Automobile and Zhongtong Bus taking off the assembly line, new energy vehicles have installed more than 70,000 high-performance permanent magnet motors.

 

From the first-generation round-strand winding motors with a power density of 4.2-5.3kW / kg to the second-generation flat-copper winding motors with a power density of 6.3kW / kg, the product and sample specifications of the permanent magnet motors are on par with or exceed those in Europe, America, Japan, and Korea Wait for the product level of first-line automotive motor manufacturers.

 

In the past two years, 17 units in the national “13th Five-Year” research and development plan for new energy vehicle drive motors have driven the upstream industry chain to break through technical bottlenecks and filled a number of national technology and product gaps. Among them, the use of heavy rare earths of rare earth permanent magnets is reduced; the long-term temperature resistance of insulating materials exceeds 200 ° C, and the corona resistance life of round electromagnetic wires is several times the national standard; the corona resistance life of enameled rectangular wires is more than 90 hours ...

 

Some of the raw materials, core components and devices that once depended on imports have achieved independent research and development and production. Some materials have not only doubled their service life compared to foreign countries, but also cost only 60% of foreign countries.