Course

Objective:

Learning Outcomes:

• list the types of relays used with synchronous motors
• explain the differences between pull-in torque, pull-out torque, and torque angle
• describe the control circuits required to start a synchronous motor
• describe the operation of friction brakes, plugging, electric brakes, dynamic brakes, and drives
• compare the different types of braking and understand the advantages and disadvantages of each type
• describe the operation of a two-speed consequent-pole motor
• explain how the speed of a Schrage motor is changed
• describe the difference between compelling circuit logic, accelerating circuit logic, and decelerating circuit logic
• explain how the variable frequency applied to an AC motor is created and applied
• explain how the variable voltage applied to a DC motor is created and applied
• describe the operation of inverter drives and vector drives
• describe the difference between rolling-contact and friction bearings
• explain how to mount a bearing
• define the difference between press-fit and push-fit installation
• list various ways bearings can become damaged and describe how the type of damage can be identified through bearing failure analysis
• explain how flexible belts are used to transfer torque and change speed between a motor and a load
• describe the different types of gears and explain how chains and gears are used to transfer torque and change speed between a motor and a load
• explain how friction clutches and eddy-current clutches are able to connect a motor to or disconnect a motor from a load while the motor is running
• describe the factors to consider when placing a motor
• describe soft foot and explain how it affects anchoring and alignment
• explain how to troubleshoot AC and DC motor
• explain how to troubleshoot motor controls and circuits
• explain how to identify unmarked motor leads
• describe the operation of stepper motors, servomotors, and phase converters
• explain how universal motors are similar to DC series motors
• explain how a linear induction motor is similar to a standard AC induction motor.
• describe how the rotor of a synchronous motor differs from the rotor of a squirrel-cage induction motor

General Topics: