How to Check for a Bad DC Electric Motor?

Answer DC (direct current) electric motors are used in many applications. The majority of these motors are used in automobiles for moving windows and passenger seating. Many times these motors are placed ... Read More »

Top Q&A For: How to Check for a Bad DC Electric Motor

How to Check an Electric Motor If It Is Bad?

Most electric motors, whether AC or DC, fail after time for reasons that may not be electrical in nature. Motors without brushes and commutators such as AC (alternating current) induction motors la... Read More »

How to Check an Electric Motor?

When a motor fails, it is often difficult to see why it failed just by looking at it. Likewise, a motor placed in storage may or may not work, regardless of its physical appearance. A quick check-o... Read More »

A vacuum cleaner is plugged into a 120.0-V socket and uses 3.0 A of current in normal operation when the back emf generated by the electric motor is 72.0 V Find the coil resistance of the motor?

Stable voltage across the motor = (120 - 72) = 48 VR = E / I = 48/3 = 16 ohms.(Assumes power-factor of 1, no reactances, back-emf in phase with the line, etc.)

How hot does an electric RC car motor get?

An electric radio controlled car brushless motor should not exceed 80 degrees Celsius. At this temperature, the magnetic components might depolarize, causing the motor to not function. Electric m... Read More »