Basic Mechanical Engineering Training Motors -2

•What are synchronous motors mainly used in?

同步电机主要应用于什么领域？

• A)Conveyor

  A)运输带

• B)Elevator

  B)升降机

• C)Dower generator

  C)发电机

• D)Electric car

  D)电动车

•Who invented AC induction motor?

谁发明了交流感应电动机？

• A) Ampere

  A)安培

• B)Elevator

  B)法拉第

• C) Thomas Alva Edison

  C)爱迪生

• D) Nikola Tesla

  D)特斯拉

•Which is servo motor’s property?

伺服马达的特性：

• Rotating speed can be 6000

  最高速度可达6000转

• The torque will decrease when speed increase

  转矩随速度增加而减少

• The output can be 50W-15KW

  功率范围大50W-15KW

• Open loop control, high accuracy

  开环控制，定位精度高

•Step motor ball screw module, if motor’s accuracy is3.6°, screw pitch is 10mm, the screw accuracy is（）

步进丝杠模组，步进电机的定位精度是3.6°丝杠导程10mm,则丝杠运动的精度可达到（）

• A)0.36mm

• B)0.1mm

• C)0.01mm

• D)0.036mm

When the load of induction motor increases, the stator’s current will?

当电动机上的负载增加时，其定子电流：

• A)Increase

  A)增加

• B)Decrease

  B)降低

• C)Unchanging

  C)不变

• D)change

  D)变化

3-Phase induction Motor’s speed will __ RMF’s speed.

感应电动机的转速永远（ ）旋转磁场的转速

• A)Less than

  A)小于

• B)More than

  B)大于

• C) Equal

  C)等于

• D) Unchanging

  D)不变

Which figure is the correct show of the balance state when stepper motor BC phase energized?

下图表示步进电机BC两相控制绕组通电时的平衡状态的是（ ）

• 
• 
• 
• 

Stepping motor is an actuator in digital control system, its function is to transform ( ) into corresponding angular displacement or linear displacement.

步进电机是数字控制系统中的一种执行元件，其功用是将（）变换为相应的角位移或直线位移。

• A)DC signal

  A)直流电信号

• B)AC signal

  B)交流电信号

• C)Computer signal

  C)计算机信号

• D)Pulse electric signal

  D)脉冲电信号

What is the characteristic of the stepper motor?

步进电机的输出特性是（ ）

• A)The voltage is proportional to the speed

  A)输出电压和转速成正比

• B)The voltage is proportional to the angle

  B)输出电压和转角成正比

• C)The speed is proportional to the amount of pulse

  C)转速与脉冲量成正比

• D)The speed is proportional to the frequency of pulse

  D)转速与脉冲频率成正比

It is known that the number of phase of the AC servo motor is 2, the frequency is 50HZ, what is the rotational speed of RMF?

已知交流伺服电机的极数对数是2，使用频率是50HZ,则旋转磁场的转速是（ ）

• A)3000r/min

• B)1500r/min

• C) 750r/min

• D) 1000r/min