68 total views
Electric motors are used in vacuum cleaners, washers and dryers, computer printers, fax, water pumps, heavy industry, cars (both traditional and hybrid), machine parts, printing presses, subway systems, and other applications. Motors dominate the automobile industry and they prove to be the heart of automobiles. Nay damage or default disturbs the functioning of the vehicle. It can lead to accidents and create chaos within a fracture of time. Therefore, its important to understand some basic electric motor faults and ways to recover those faults.
3 MJAOR FAULTS AND THEIR SOLUTIONS
- Low resistance
The most common cause of failure in electric motors is low resistance. It is also frequently the most challenging to overcome. Degradation of the insulation of the internal windings of the motor may occur under conditions such as overheating, corrosion, or physical damage. As a result of insufficient isolation between the motor windings or conductors, short circuits, leakages, and eventually motor failure occur. Inspect the insulation of the windings on a regular basis for signs of wear and replace it before low resistance leads to failure.
- Electrical overload
Overcurrent is another term for electrical overload. It is caused by an excessive flow of current within the motor’s windings, which exceeds the design current that the motor can safely and efficiently carry. Overcurrent is frequently caused by a low supply voltage, which causes the motor to draw more current in an attempt to maintain torque. Short-circuited conductors or an excessive voltage supply can also cause electrical overload. To protect the motor, it is critical to install effective overcurrent protection that can detect overcurrent and interrupt power supply.
Electric motors are frequently used in environments where dust, dirt, and chemicals can enter the motor and cause contamination and motor failure. These contaminants have the potential to dent bearing raceways and balls, resulting in excessive vibration and wear. They may also obstruct the cooling fan, limiting the motor’s ability to regulate temperature and increasing the possibility of overheating.
- Winding and Insulation Failure
This is the most common reason for an electric motor to fail. A winding may fail as a result of a bad connection, an open contactor, a blown fuse, broken power lines, an electric overload, and other factors. Winding insulations may fail due to thermal deterioration caused by unbalanced power loads at times. Furthermore, suboptimal or harsh working conditions may increase the likelihood of failure. To a large extent, timely maintenance can help avoid failure. This maintenance can be scheduled on a weekly, monthly, or as-needed basis.
Contamination is one of the leading causes of failure in electric motors, so it is critical to keep it out of the motor. To help eliminate the possibility of contamination entering the motor, keep work areas, tools, and fixtures as clean as possible at all times. When designing the workspace, try to keep motors away from applications that produce large amounts of harmful contamination, such as grinding machines.
To ensure better electric motor maintenance, all maintenance procedures and tests should be carried out in a systematic manner in order to identify potential problems and correct them before they cause unwelcome downtime. This method not only improves the motor’s operation but also extends its life.