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。
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.
电阻器是用一种耐高温的有机硅树脂和硅粉作基本材料封装的功率型绕线电阻。
This resistor is power wire wound resistor which is made by a kind of organic silicon rosin and silicon powder as basic material encapsulation.
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