At power frequencies ( 45 hz to 60 hz ) , the measuring range can be extended to 100 a . however , the calibrator under test must be capable of driving inductive loads as precision current transformers will be used for the measurements in this extended range 有关的测量量程在市电频率( 45hz至60hz )可扩大至100a 。但由于在此扩大量程的测量需使用精密电流变压器,故此接受测试的校正器必须有驱动电感负载的能力。
1 m 0 . 5 , the phase - shifted angle 6 is controlled in term of sine law which makes the magnitude of resonant voltage track a reference sine voltage , and the resonant voltage is rectified , filtered , inverted and then the better sine - voltage output is obtained , theoretical analysis and experimental results show that for the resistive load and inductive load , the switches of leading leg of the phase - shift - controlled circuit are always turned on at zvs , and ones of lagging leg are turned on at zvs ( < 0 ) or turned off at zcs ( ( > 0 ) , moreover , all switches in the low - frequency inverter are always turned on and off at zvs , the measured circuit efficiency for rated load reaches up to 88 % 从功率单向流动角度出发,提出了一种lcc谐振型恒频移相单相高频链逆变电路拓扑,在调制系数0 . 1 m 0 . 5情况下,控制移相角按正弦规律变化,使谐振电压脉冲列的幅值追踪参考正弦电压信号,经过整流、滤波、低频逆变,从而获得正弦度较好的输出电压。理论分析和实验结果证明对于阻性负载或阻感性负载,移相全桥具有超前桥臂零电压开通,滞后桥臂或者零电压开通( _ 0 )或者零电流关断( _ 0 )的软开关特性,而低频逆变器的各个开关均实现零电压条件下的开通与关断。
It ' s high - frequence noise absorption , absorption of noise caused by rapid rise of front and self - reset function have widespread application in imput of supply , for absorption of inductive load switching surge voltage and for protection of two - way thyristor switching device , bypass capacitors , micro - machines and the others 它所具有的吸收高频噪声、前沿快脉冲上升噪声及自复位功能,使其在电源输入端、吸收电感性负载开关浪涌电压、保护双向可控开关器件、旁路电容器、微型电机等方面有着广泛的用途。