road haul meaning in Chinese

行驶里程

This dissertation is devoted to the study on permanent magnet synchronous motor ( pmsm ) drive system in electric vehicle ( ev ) application aided by the state " 863 plan " and the science and technology items of liaoning province . four parts are included as follows : first of all , an efficiency - optimization control strategy for pmsm system used in ev is presented in order to extend road haul per charge
在国家863计划“九五”重大项目“钕铁硼电机应用产品开发” 、辽宁省科学技术计划项目“高性能钕铁硼永磁电机的研制”及沈阳市“十五”科技攻关项目资助下，本文研究工作围绕电动汽车用永磁同步电动机( pmsm )传动控制系统展开，研究内容分为以下四个部分：首先，为提高电动汽车一次充电续行里程，提出电动汽车用pmsm系统的效率优化控制策略。