低速范围 meaning in Chinese

low-speed range

This paper makes the feasibility design and study of the dtc ( direct torque control ) system based on analyzing some important parts , such as the arithmetic model of asynchronous motor in - coordinates , the choice of voltage vectors , and flux - linkages models , etc . the research work in this paper is described as follows : 1 analyzing of the dtc theory : material about the development and theory of dtc , the composing of dtc - system are presented in this paper
本文在详细分析了定子坐标系下的异步电动机数学模型、电压空间矢量和磁链观测器的基础上，利用直接转矩控制技术，构建了基于dsp的直接转矩控制系统。论文的主要工作包括以下三个方面： 1直接转矩理论分析研究：针对直接转矩控制理论在低速范围转矩观测器和转速波动等问题，采取了滞环模式切换，矢量细分等改进措施。