A few of the improvements attained by EVER-POWER drives in energy effectiveness, productivity and process control are truly remarkable. For instance:
The savings are worth about $110,000 a year and have cut the company’s annual carbon footprint by 500 metric tons.
EVER-POWER medium-voltage drive systems enable sugar cane plant life throughout Central America to be self-sufficient producers of electricity and boost their revenues by as much as $1 million a calendar year by selling surplus capacity to the local grid.
Pumps operated with adjustable and higher speed Variable Speed Electric Motor electric motors provide numerous benefits such as greater selection of flow and head, higher head from an individual stage, valve elimination, and energy conservation. To achieve these benefits, however, extra care should be taken in selecting the appropriate system of pump, electric motor, and electronic motor driver for optimum interaction with the process system. Successful pump selection requires understanding of the complete anticipated range of 
heads, flows, and particular gravities. Electric motor selection requires appropriate thermal derating and, sometimes, a matching of the motor’s electrical feature to the VFD. Despite these extra design factors, variable rate pumping is becoming well accepted and widespread. In a straightforward manner, a conversation is presented on how to identify the huge benefits that variable speed offers and how exactly to select elements for hassle free, reliable operation.
The first stage of a Adjustable Frequency AC Drive, or VFD, may be the Converter. The converter is made up of six diodes, which act like check valves found in plumbing systems. They allow current to stream in only one direction; the path shown by the arrow in the diode symbol. For instance, whenever A-stage voltage (voltage is comparable to pressure in plumbing systems) is definitely more positive than B or C phase voltages, then that diode will open and allow current to circulation. When B-phase becomes more positive than A-phase, then the B-phase diode will open up and the A-stage diode will close. The same holds true for the 3 diodes on the negative side of the bus. Therefore, we get six current “pulses” as each diode opens and closes.
We can get rid of the AC ripple on the DC bus with the addition of a capacitor. A capacitor operates in a similar style to a reservoir or accumulator in a plumbing program. This capacitor absorbs the ac ripple and delivers a easy dc voltage. The AC ripple on the DC bus is normally less than 3 Volts. Thus, the voltage on the DC bus turns into “around” 650VDC. The actual voltage will depend on the voltage level of the AC series feeding the drive, the level of voltage unbalance on the energy system, the electric motor load, the impedance of the power system, and any reactors or harmonic filters on the drive.
The diode bridge converter that converts AC-to-DC, is sometimes just referred to as a converter. The converter that converts the dc back to ac can be a converter, but to distinguish it from the diode converter, it is generally referred to as an “inverter”.
In fact, drives are a fundamental element of much bigger EVER-POWER power and automation offerings that help customers use electricity effectively and increase productivity in energy-intensive industries like cement, metals, mining, oil and gas, power generation, and pulp and paper.