The efficiency of electric motors is a great contributory factor to keep the production cost minimum. The maximum efficiency of electric motors is near 75% of the rated load. The efficiency of an electric motor decreases if the motor is run below 50% load. Similarly, efficiency decreases if the motor is overloaded. However, the range of ideal load for the peak efficiency varies at large according to brands and type of motors. For example, Crompton Greaves electric motors are trusted for delivering the best efficiency at a range of loads.
Three Categories of Electric Motors:
Like many others, the efficiency of electric motors will be your big concern. To address this concern, prepare a database of motor usage over 1000 hrs/year. To pinpoint your focus for overall efficiency improvement, divide the installed motors into three categories:
- Properly sized motors delivering standard efficiency: Replace these motors with energy-efficient models when these fail. The leading Crompton Greaves electric motor distributors offer a range of Eff I / IE2 / IE3 class motors.
- Moderately oversized or under-loaded Motors: Replace the listed motors with properly sized models selected on the base of application type when these fail. For example, TEFC electric motors are designed for low voltage areas.
- Highly oversized and under-loaded Motors: Replace these motors with properly sized efficient models the best suitable for the particular usage conditions during scheduled shut-down.
Five Factors That Secretly Reduce Efficiency Of Electric Motors:
- Power Supply Voltage: The change in motor efficiency is proportionate to the change in power supply voltage.
- Quality of Power Supply: The stall current in power supply, caused by in-circuit resistances, impacts the performance of the electric motor.
- Environmental Temperature: The motor body temperature in running condition affects the magnetic forces. A higher temperature than the recommended temperature is sure to harm the electric motor efficiency. Synchronous reluctance motors are good for high ambient temperature conditions.
- Winding Type: The number of turns/ slot and the magnet wire diameter affect the motor’s efficiency.
- Structure and Yoke: The magnetic leakage out of motor structure affects the performance. The magnet yokes are used to increase efficiency of motors.
Seven Tips to Get Maximum Efficiency of the Electric Motors:
- Correct voltage unbalance including the correction of unbalanced current for a particular motor design
- Implement Variable Frequency Drives (VFDs)
- Use the electric motors of the proper size for the particular usage conditions and applications
- Use the motors with Copper bars in rotor and Copper winding in the stator coil
- Maintain shaft alignment with precision to reduce the jerks
- Use appropriate smart Motor Starter
- Minimize wear and tear with scheduled periodic maintenance
The electric motors of premium brands like Crompton Greaves save for you in long run. S.C. Industrial like leading Crompton Greaves electric motor dealers in Mumbai offer the widest range of energy efficient motors to help you choose the best in the line of buying parameters like- construction type, winding type, rated load, performance specifications, power supply type, environmental conditions, and safety standards, etc.