Saving Energy and Water with VFDs

摘要

In today's world, with power transmission overloads in the Northeast and blackouts in the West, the U.S. Dept. of Energy (DOE) is concentrating its efforts on reducing energy consumption. According to DOE, approximately 63% of industrial electrical power consumed in the U.S. is used to operate electric motors. Water pumping is one of those applications that uses electric motors. Every municipality deals with getting water to and frorn every home and business. For each of these communities, water usage varies throughout the day. When demand decreases, control valves are adjusted, yet the motor stays running full speed. This is similar to when you approach a red traffic light in your car and instead of reducing engine speed, you simply apply the brakes. Most people would say that's an inefficient way to operate your car. The same is true for electric motors.