Endshield: That part of the motor housing which supports the bearing and acts as a protective guard to the electrical and rotating parts inside the motor.
What is the end of a motor called?
The back end of a normal motor is the end that carries the coupling or driving pulley (NEMA). This is sometimes called the drive end (D.E.), pulley end (P.E.) etc. (See page 2.)
What is drive end of motor?
the drive end (D.E., pulley end P.E.) etc. Base End of a Motor: The speed which a d-c motor develops at rated armature and field voltage with rated load applied. “
What is an Endbell?
End Bells are apparatuses within rotating motors that are part of the housing that supports the bearing and guards other rotating parts.
What is the meaning of motor rating in electric machine?
Most electric motors are designed to run at 50% to 100% of rated load. Maximum efficiency is usually near 75% of rated load. Thus, a 10-horsepower (hp) motor has an acceptable load range of 5 to 10 hp; peak efficiency is at 7.5 hp. A motor’s efficiency tends to decrease dramatically below about 50% load.
How do you tell if an electric motor is clockwise or counterclockwise?
You can determine shaft end perspective by simply holding your motor up in front of you and pointing the shaft at you. If the shaft is pointing at you and rotates to the right, your motor is clockwise shaft end, or CWSE. If the shaft rotates to the left, your motor is counterclockwise shaft end, or CCWSE.
How do you stop an electric motor?
Dynamic braking is another method for braking a motor. It is achieved by reconnecting a running motor to act as a generator immediately after it is turned off, rapidly stopping the motor. The generator action converts the mechanical energy of rotation to electrical energy that can be dissipated as heat in a resistor.
What is the first thing you should do when troubleshooting a motor?
For the supply, test first with the motor disconnect open and locked out. Use your megohmmeter to test the insulation resistance to ground.
Final tests and procedures.
- Listen for unusual noises.
- Smell for smoke or hot insulation.
- Feel the motor for excessive heat or vibration.
- Look for possible obstructions.
Which switch is used for the automatic control of the motor?
Explanation: TRIAC (Triode alternating current) is a bi-directional switching device. They are often used as motor driver or motor controller to control the revolution speed of the motor shaft. They are even capable of controlling AC power.
Do electric motors slow with age?
Yes. Brushless, electric motors do lose power over time.
How long can an electric motor run continuously?
If you are looking for a motor with a long life expectancy, consider a brushless motor. Brushed motor life is limited by the brush type and can attain 1,000 to 3,000 hours on average, while brushless motors can attain tens of thousands of hours on average, as there are no brushes to wear.