Aiming at different working conditions , single - phase ac sampling arithmetics are simulated under matlab . the simulation achieve the arithmetics of higher precision under the condition of much harmonics 针对不同典型的工况，对单相交流采样算法进行理论仿真研究，得到在谐波较大的情况下，精度较高的算法。
Single phase ac active reactive power meter double screen digital display outline dimension 16080 mm switch power supply input voltage 0100 v input current 05 a active power display 2500 w , reactive power display 2500 var 单相交流有功无功功率表;双屏数字显示;外形尺寸16080开关电源供电电压输入0 100v电流输入0 5a有功显示2500w无功显示2500var 。
Little systematical research has been carried out long after the new start scheme was presented , especially lack of quantified analysis of the nature of the system and the characteristic of torque output in standstill and low speed range 单相交流励磁作为一种新型的起动方案提出后，一直还没有系统地、从数量关系上揭开该系统的内在规律，特别是静止和低速时起动转矩的特性。
The “ gw9 - 12 ” type of outdoor high voltage isolator switch is the high voltage switch ewuip ment of single phase ac 50hz , the product is suitable for power system sithrated 10kv to make or break power supply under circumstances of with voltage and nomload 12型户外高压职责离开关是单相交流50hz高压开关设备，用于10kv的电力系统中，作为有电压无负载的情况下接通或分断电源使用。
Single phase ac active power meter : single screen digital display ; outline dimension 9648 mm ; no communication interface ; no transmission output ; no alarm output ; switch power supply ; input voltage 0400 v ; input current 05 a ; power display 02000 w 单相交流有功功率表:单屏数字显示;外形尺寸9648 ;无通讯接口;无变送输出;无报警输出;开关电源供电;输入电压0 400v ;输入电流0 5a ;功率显示0 2000w 。
Single phase ac active reactive power meter double screen digital display outline dimension 80160 mm rs - 485 standard serial communication ma transmission output switch power supply input voltage 0220 v , input current 05 a active power display 1100 w , reactive power display 1100 var 单相交流有功无功功率表双屏数字显示外形尺寸80160 rs - 485标准串行通讯4 20 ma变送输出开关电源供电电压输入0 220v ;输入电流0 5a ;有功显示1100w ,无功显示1100var 。
The principle of ac - dc - ac locomotive is that transformer transforms the high single - phase ac voltage from contact system to lower ac voltage first , then rectifier transforms this ac voltage to steady dc voltage , finally converter transforms this dc voltage to three - phase vfvv ac voltage as the voltage source for asynchronous machine 交?直?交型电力机车系统的原理是：先将从接触网获得的单相交流高电压经变压器降压后，再经整流器变换为平稳的直流电压，直流电压经逆变器变换为三相交流电压，供给机车轮对上的牵引电机。
Adopt advanced microprocessor carry out smart control and to the simultaneous inputed single phase ac voltage and current signal carry out accurate measurement , through cpu automatic count the single phase ac active reactive power value which is displayed clearly and visually by the high brilliance led digital tube or high resolution light column , and can select serial communication function 采用先进的微处理器进行智能控制，对同时输入的单相交流电压与电流信号进行精确测量,经过cpu自动计算出单相交流有功无功功率值,由高亮度led数码管或高分辨率光柱进行清晰直观的显示，并可选择串行通讯功能。
Adopt advanced microprocessor carry out smart control and to the simultaneous inputed single phase ac voltage and current signal carry out accurate measurement , through cpu automatic count the single phase ac active power value , reactive power value , which is displied clearly and visually by the high brilliance led digital tube or high resolution light column , uper screen display active power and down screen display reactive power , and can select serial communication function 采用先进的微处理器进行智能控制，对同时输入的单相交流电压与电流信号进行精确测量，经过cpu自动计算出单相交流有功功率值，无功功率值。上屏显示有功功率下屏显示无功功率，并可选择串行通讯功能。
Intelligent single phase ac active reactive power double way instrument adopt advanced microprocessor carry out smart control and to the simultaneous inputed single phase ac voltage and current signal carry out accurate measurement , through cpu automatic count the single phase ac active power value , reactive power value , which is displied clearly and visually by the high brilliance led digital tube or high resolution light column , uper screen display active power and down screen display reactive power , and can select serial communication function 智能单相交流有功无功功率双路仪表采用先进的微处理器进行智能控制，对同时输入的单相交流电压与电流信号进行精确测量，经过cpu自动计算出单相交流有功功率值，无功功率值，由高亮度led数码管或高分辨率光柱进行清晰直观的显示，上屏显示有功功率下屏显示无功功率，并可选择串行通讯功能。
