New Motors Offer Less Energy Use and Better Performance
Equipment that uses motors, such as fans, pumps, and air compressors, account for about half the electricity used in industry. Selecting more efficient and better performing motors can lead to significant savings over time.
New federal efficiency standards, which are similar to the National Electrical Manufacturers Association’s 2001 specifications for premium-efficiency motors (NEMA Premium®), mean that motors manufactured after December 2010 will use less electricity. New technologies, however, offer the potential of even greater savings.
New copper-casting techniques mean that rotor bars may now be made of copper, which is more conductive than aluminum. Induction motors with cast-copper rather than aluminum rotor bars are more efficient.
Electronically Commutated Motors
An electronically commutated motor (ECM) is a direct current (DC) motor that uses magnets on the rotor to create the magnetic field. Since there are no rotor windings, there is less maintenance and they offer variable speed, power and torque. While ECMs have significantly higher upfront costs, their efficiency and low maintenance means they can be cost-effective in some applications.
Sensorless Alternating Current (AC) Vector Drives
Newer vector-controlled variable frequency motor drives adjust voltage and frequency independently, based on feedback from the motor. Sensorless drives, which get feedback from the current drawn by the motor, now cost about the same as regular variable frequency drives. However, their ability to match motor performance to the needs of the application makes them more efficient.
Before it's time to replace a motor or get new equipment, talk with your Jackson EMC Commercial & Industrial Representative about whether a different type of motor could save energy and money.