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为满足四化建设要求,在建筑施工中,推广应用各类手持式建筑机具,以减轻劳动强度,提高工效,加速工程进度,已是势在必行。而建筑电动工具由于品种多,适应性强,具有多方面的优点,已引起人们普遍的注意。建筑电动工具是手持式建筑机具中的一个主要机种,它是由小容量电机,通过传动机构带动工作装置进行工作的。它所采用的电机有90％以上是单相串激式电动机,这类电机的特点是转速高,起动转矩大,单位重量出力大,有软的机械特性,承受短时过载能力强,这些特性很适合作为手持机具的动
In order to meet the requirements of the four modernization projects, it is imperative to promote the use of various hand-held construction machines in building construction in order to reduce labor intensity, improve work efficiency, and accelerate project progress. The building electric tools have attracted widespread attention due to their variety and adaptability, which have many advantages. The building power tool is a major model of hand-held construction tools. It is a small-capacity motor that drives a work device through a transmission mechanism. More than 90% of the motors it uses are single-phase series motors. These motors are characterized by high speed, high starting torque, large unit weight output, soft mechanical characteristics, and strong short-term overload tolerance. Features are suitable as mobile handheld devices