Adjustable speed drives, called ASDs or VSDs, have been available for use with a wide range of applications for over 20 years. These applications include single motor driven pumps, fans and compressors, as well as highly sophisticated multi-drive machines.
ASD's function to adjust motor speed to better fulfill the requirements of a driven load. The results are better process control and reduced energy consumption. Variable speed drive systems are fairly expensive, but provide an excellent degree of control over plant operations. In most cases, the reduction of energy costs following the installation of an adjustable speed drive is enough to offset, if not completely pay for, high initial costs.
The VSD converts AC power from an incoming power supply to DC voltage. The drive may also include a control mechanism by which to remotely communicate to the motor and driven load.
This control mechanism facilitates the connection of electronic equipment to monitor load speed, start and stop the motor, and perform various other functions to meet process requirements more effectively.
And Furthermore . . .
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