MOTOR TROUBLESHOOTING
Figure 8.2 illustrates a troubleshooting flowchart which provides logical, step-by-step methods for identifying and correcting motor problems.
Warning: The internal parts of a motor could be at line potential even when it is not rotating. Disconnect all power to the motor before performing any maintenance which could require contacting internal parts.
This is the key for Fig. 8.2 on troubleshooting ac motors.
A. Motor would not start or accelerates too slowly.
B. Motor runs noisy.
C. Motor overheats.
D. Motor bearings run hot or noisy.
Related posts:
POWER ELECTRONICS, RECTIFIERS, AND PULSE-WIDTH MODULATION INVERTERS:INVERTERS
Braking:Plugging
Measurement:The Decibel in Acoustics—LP, LW, and LI
Motor Repair
Devices, symbols, and circuits:Electrical circuits
Headphones:Basic Headphone Types
Troubleshooting control circuits:Plug stop and anti-plug circuits
Identifying Unmarked Leads in a Nine-Lead Three-Phase Motor
Loudspeakers:Soft Domes
The Operational Amplifier
Motor Calculations part2
Computations and circle diagrams:Speed Control of Induction Motors
Multicore Cables and Cabletray:NYM-J Cables
VIBRATION ANALYSIS:VIBRATION SEVERITY