A rotary vane vacuum pump enables the compression of air inside the pump chamber to create suction for the removal of air molecules from a vessel or area. 
旋片式真空泵可以抽除密封容器中的干燥气体，若附有气镇装置，还可以抽除一定量的可凝性气体。但它不适于抽除含<a href="https://baike.baidu.com/item/%E6%B0%A7" target="_blank">氧</a>过高的，对金属有腐蚀性的、对泵油会起化学反应以及含有颗粒尘埃的气体。

Rotary Vane Vacuum Pump 旋片式真空泵

A coolant pump is a type of pump used to recirculate a coolant, generally a liquid, that is used to transfer heat away from an engine or other device that generates heat as a byproduct of producing energy. 
水泵电机能广泛应用于不同领域，除在易燃、易爆或有腐蚀性气体的场合外，如运输、混合、印刷、农业机械和视频处理机中应用外，还可以应用与机床、泵类、鼓风机、压缩机等配套设备。

Coolant Pump Motor 冷却泵 水泵 油泵

Servomotor is a <a href="https://en.wikipedia.org/wiki/Rotary_actuator" target="_self">rotary actuator</a> or <a href="https://en.wikipedia.org/wiki/Linear_actuator" target="_self">linear actuator</a> that allows for precise control of angular or linear position, velocity and acceleration. It consists of a suitable motor coupled to a sensor for position feedback. It also requires a relatively sophisticated controller, often a dedicated module designed specifically for use with servomotors. 
伺服电机可使控制速度，位置精度非常准确，可以将电压信号转化为<a href="https://baike.baidu.com/item/%E8%BD%AC%E7%9F%A9/6531115" target="_blank">转矩</a>和转速以驱动控制对象。伺服电机转子转速受输入信号控制，并能快速反应，在自动控制系统中，用作执行元件，且具有机电时间常数小、线性度高等特性，可把所收到的电信号转换成电动机轴上的角位移或角速度输出。分为直流和<a href="https://baike.baidu.com/item/%E4%BA%A4%E6%B5%81%E4%BC%BA%E6%9C%8D%E7%94%B5%E5%8A%A8%E6%9C%BA/1433887" target="_blank">交流伺服电动机</a>两大类，其主要特点是，当信号电压为零时无自转现象，转速随着转矩的增加而匀速下降。

A stepper motor, also known as step motor or stepping motor, is a brushless DC electric motor that divides a full rotation into a number of equal steps. 
步进电机是一种将电<a href="https://baike.baidu.com/item/%E8%84%89%E5%86%B2" target="_blank">脉冲</a>信号转换成相应<a href="https://baike.baidu.com/item/%E8%A7%92%E4%BD%8D%E7%A7%BB/895038" target="_blank">角位移</a>或<a href="https://baike.baidu.com/item/%E7%BA%BF%E4%BD%8D%E7%A7%BB/477860" target="_blank">线位移</a>的电动机。每输入一个<a href="https://baike.baidu.com/item/%E8%84%89%E5%86%B2%E4%BF%A1%E5%8F%B7/346066" target="_blank">脉冲信号</a>，<a href="https://baike.baidu.com/item/%E8%BD%AC%E5%AD%90/1993958" target="_blank">转子</a>就转动一个角度或前进一步，其输出的<a href="https://baike.baidu.com/item/%E8%A7%92%E4%BD%8D%E7%A7%BB/895038" target="_blank">角位移</a>或<a href="https://baike.baidu.com/item/%E7%BA%BF%E4%BD%8D%E7%A7%BB/477860" target="_blank">线位移</a>与输入的脉冲数成正比，<a href="https://baike.baidu.com/item/%E8%BD%AC%E9%80%9F/5487479" target="_blank">转速</a>与<a href="https://baike.baidu.com/item/%E8%84%89%E5%86%B2%E9%A2%91%E7%8E%87/9841161" target="_blank">脉冲频率</a>成正比。因此，<a href="https://baike.baidu.com/item/%E6%AD%A5%E8%BF%9B%E7%94%B5%E5%8A%A8%E6%9C%BA/9491295" target="_blank">步进电动机</a>又称<a href="https://baike.baidu.com/item/%E8%84%89%E5%86%B2%E7%94%B5%E5%8A%A8%E6%9C%BA/12732185" target="_blank">脉冲电动机</a>。

An electric motor is an <a href="https://en.wikipedia.org/wiki/Electric_machine" target="_self">electrical machine</a> that converts <a href="https://en.wikipedia.org/wiki/Electrical_energy" target="_self">electrical energy</a> into <a href="https://en.wikipedia.org/wiki/Mechanical_energy" target="_self">mechanical energy</a>. Most electric motors operate through the interaction between the motor's <a href="https://en.wikipedia.org/wiki/Magnetic_field" target="_self">magnetic field</a> and <a href="https://en.wikipedia.org/wiki/Electric_current" target="_self">electric current</a> in a <a href="https://en.wikipedia.org/wiki/Electromagnetic_coil" target="_self">wire winding</a> to generate force in the form of <a href="https://en.wikipedia.org/wiki/Torque" target="_self">torque</a> applied on the motor's shaft. Electric motors can be powered by <a href="https://en.wikipedia.org/wiki/Direct_current" target="_self">direct current</a> (DC) sources, such as from batteries, or <a href="https://en.wikipedia.org/wiki/Rectifiers" target="_self">rectifiers</a>, or by <a href="https://en.wikipedia.org/wiki/Alternating_current" target="_self">alternating current</a> (AC) sources, such as a power grid, <a href="https://en.wikipedia.org/wiki/Inverter_(electrical)" target="_self">inverters</a> or electrical generators. An <a href="https://en.wikipedia.org/wiki/Electric_generator" target="_self">electric generator</a> is mechanically identical to an electric motor, but operates with a reversed flow of power, converting mechanical energy into electrical energy. 
电动机（Motor）是把<a href="https://baike.baidu.com/item/%E7%94%B5%E8%83%BD/889532" target="_blank">电能</a>转换成<a href="https://baike.baidu.com/item/%E6%9C%BA%E6%A2%B0%E8%83%BD/537228" target="_blank">机械能</a>的一种设备。它是利用通电<a href="https://baike.baidu.com/item/%E7%BA%BF%E5%9C%88/6244981" target="_blank">线圈</a>（也就是<a href="https://baike.baidu.com/item/%E5%AE%9A%E5%AD%90/9205822" target="_blank">定子</a>绕组）产生旋转磁场并作用于转子（如鼠笼式闭合铝框）形成磁电动力旋转<a href="https://baike.baidu.com/item/%E6%89%AD%E7%9F%A9/430391" target="_blank">扭矩</a>。电动机按使用电源不同分为<a href="https://baike.baidu.com/item/%E7%9B%B4%E6%B5%81%E7%94%B5%E5%8A%A8%E6%9C%BA/6393701" target="_blank">直流电动机</a>和<a href="https://baike.baidu.com/item/%E4%BA%A4%E6%B5%81%E7%94%B5%E5%8A%A8%E6%9C%BA/4815554" target="_blank">交流电动机</a>，电力系统中的电动机大部分是<a href="https://baike.baidu.com/item/%E4%BA%A4%E6%B5%81%E7%94%B5%E6%9C%BA/9952200" target="_blank">交流电机</a>，可以是<a href="https://baike.baidu.com/item/%E5%90%8C%E6%AD%A5%E7%94%B5%E6%9C%BA/6468631" target="_blank">同步电机</a>或者是<a href="https://baike.baidu.com/item/%E5%BC%82%E6%AD%A5%E7%94%B5%E6%9C%BA/6471176" target="_blank">异步电机</a>（电机定子磁场转速与转子旋转转速不保持同步速）。电动机主要由定子与转子组成，通电导线在磁场中受力运动的方向跟电流方向和磁感线（磁场方向）方向有关。电动机工作原理是磁场对电流受力的作用，使电动机转动。

Electric Motor / Coolant Pump / Vacuum Pump Motor（ 电机 / 水泵 / 马达 / 真空泵 ）

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Rotary Vane Vacuum Pump 旋片式真空泵

Rotary Vane Vacuum Pump 旋片式真空泵