Adjustable Speed Drives
The are two main economic benefits of adjustable speed drives: decreased energy use and improved process control.
ASDs can substantially reduce the amount of energy used in certain motor
operations by controlling the speed or rate of flow of an operation rather than
relying on valves or other energy dissipating devices to control the speed or flow rates.
When evaluating systems for ASDs, we need to keep in mind that there are
different types of loads, each with different characteristics. They are:
- variable torque loads like fans and pumps,
- constant torque loads like conveyors and positive displacement or
reciprocating pumps, and
- constant horsepower loads like grinders and winding machines.
Each of these types of loads has unique characteristics which impact the
amount of energy savings and process control that can be expected with an ASD. Not all applications will benefit economically from the addition of a drive, but
all would enjoy better process control. The question is, at what cost is it
feasible to upgrade? The examples are designed to help you conquer the evaluative process of adding an ASD.
And Furthermore . . .
Variable Torque Loads
Constant Torque Loads
Constant Horsepower Loads
Variable Torque Load Example Installation
Constant Torque Load Example Installation
Constant Horsepower Load Example Installation
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