软起动（又称软启动器，电机软起动器，软起动器）
Soft starter (also known as soft starter, motor soft starter, soft starter)
电动机软起动是通过采用降压、补偿或变频等技术手段，实现电动机及机械负载的平滑起动，减少起动电流对电网的影响程度，使电网和机械系统得以保护。
Motor soft start is achieved by means of step-down, compensation or frequency conversion technology, so as to achieve smooth start of motor and mechanical load, reduce the influence degree of starting current on the power grid, and protect the power grid and mechanical system.
本技术领域研究的主要内容分三个方面阐述：
The main content of the research in the field of technology is divided into three aspects:
一是使电动机的输出力矩满足机械系统对起动力矩的要求，保证平滑加速，平滑过渡，避免破坏性力矩冲击；
The first is to make the output torque of the motor meet the requirements of the mechanical system on the starting moment, to ensure smooth acceleration, smooth transition, and to avoid the impact of destructive torque.
二是使起动电流满足电动机承受能力的要求，避免电动机起动发热造成绝缘破坏或烧毁； 三是使起动电流满足电网电能质量相关标准要求，减少电压暂降幅度，减少高次谐波含量等。
The two is to make the starting current meet the requirements of the motor bearing capacity, to avoid the insulation failure or burn up of the motor starting, and the three is to make the starting current meet the relevant standard requirements of the power quality, reduce the voltage sag magnitude and reduce the high-order harmonic content.
