Applications of Energy Efficiency Variable Speed Drives (VSD), Frequency Converter
Most motors run at nearly constant speed. However, much of the time, the devices ac motors drive may operate at less than maximum design speed. Variable Speed Drives (VSD, Frequency Converter) can be used to reduce the speed to the driven load. Slowing a pump or fan with variable speed drive (vsd, frequency converter) reduces energy consumption much more effectively than allowing the motor to run at constant speed and then restricting or bypassing the flow with a valve or damper.
Applications of energy efficiency variable speed drive (vsd, frequency converter):
The most common applications of ariable speed drive (vsd, frequency converter, adjustable frequency drive) are for pumps and fans to balance flows, and meet changing system needs. For example, Variable speed drives (frequency inverters) can be very cost-effective in retrofit or new construction of heating, ventilating, and air conditionin (HVAC) systems. Many heating, ventilating, and air conditionin (HVAC) systems were designed with constant flow pumps and fans that are throttled to meet changing operating conditions.
Variable speed drive (vsd, frequency converter, adjustable frequency drive) is also useful for loads, such as elevators, water and wastewater pumps, boiler fans, cooling towers, cranes and conveyors. The speed range, required precision of speed control, and required torque at lower speeds dictate the type of variable speed drive (vsd, frequency converter, adjustable frequency drive) needed.
