能实现无级变速传动的机构很多，也很成熟，如摩擦传动、液力传动、电变频传动等等。但它们共同的弱点，一是传动效率低，二是传动功率小。而很多领域迫切需要高效率大功率无级变速装置，如运输、发电、纺织、印刷、家电、煤炭行业等等。巨大的市场需求，吸引了许多能人志士和 Able to achieve a lot of CVT transmission mechanism is also very mature, such as friction transmission, hydraulic transmission, electric variable frequency drive and so on. However, their common weakness, first, transmission efficiency is low, and second, transmission power is small. In many fields, there is an urgent need for high-efficiency and high-power CVTs such as transportation, power generation, textile, printing, home appliances, coal industry and so on. Huge market demand has attracted many energy people and lofty ideals