The zero voltage space vector is used to keep the steady state and reduce frequency of inverter.

并且，零电压矢量被引入以保证在一定的情况下保持当前的转矩和磁链状态，减少逆变器开关次数。

Experiments show that with fluidized bed combustion technique to directly heat air by burning coal can reduce frequency of energy transfer and thus raise energy utilization rate.

试验表明：采用流化床燃烧技术，通过燃煤直接加热空气，可减少能量转换环节，提高能源利用率；