up-converting laser是什么意思

用法例句

The motor s start and accelerating process were carried out by increasing frequency and increasing voltage method.

针对无位置传感器无刷直流电动机的控制要求,采用反电势积分法来获取转子位置信号,根据电机转速进行相位补偿,实现了电机的准确换相控制;采用升频升压法实现电机的起动和加速,最终切换为无位置传感器无刷工作状态。