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PWM mode was analyzed, and a kind of variable-resistance timing Winch being of simple structure and large power supply was put forward by using wire-wound motor and series resistance timing principle.
分析了PWM的调整方式，利用绕线式电机和串电阻调速的原理，提出了一种结构简单、功率强的变阻调速绞车。
Besides there is also some alternatives such as an inductance conversion using differential transformer and space curve deformeter and variable resistance pressure transmitter.
除此之外还有利用差动变压器和扰曲线应变计的电感变换方式，以及变电阻式压力变送器。
The paper introduces the working principle, constitution and application of a new type liquid variable resistance starter of high power motor used in coal mine.
介绍了一种新型矿山大功率电机液体变阻启动器的工作原理、构成及应用情况。
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