Some of the improvements achieved by EVER-POWER drives in energy performance, productivity and procedure control are truly remarkable. For instance:
The savings are worth about $110,000 a year and also have slice 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 become self-sufficient producers of electricity and boost their revenues by as much as $1 million a season by selling surplus capacity to the local grid.
Pumps operated with variable and higher speed electric motors provide numerous benefits such as greater range of flow and head, higher head from a single stage, valve elimination, and energy conservation. To accomplish these benefits, nevertheless, extra care should be taken in choosing the appropriate system of pump, motor, and electronic electric motor driver for optimum interaction with the procedure system. Effective pump selection requires knowledge of the complete anticipated selection of heads, flows, and particular gravities. Engine selection requires suitable thermal derating and, at times, a matching of the motor’s electrical feature to the VFD. Despite these extra design factors, variable speed pumping is now well accepted and widespread. In a straightforward manner, a discussion is presented on how to identify the huge benefits that variable rate offers and how exactly to select parts for hassle free, reliable operation.
The first stage of a Adjustable Frequency AC Drive, or VFD, is the Converter. The converter can be made up of six diodes, which are similar to check valves found in plumbing systems. They allow current to circulation in mere one direction; the path proven by the arrow in the diode symbol. For example, whenever A-stage voltage (voltage is similar to pressure in plumbing systems) is more positive than B or C phase voltages, after that that diode will open up and allow current to circulation. When B-phase turns into more positive than A-phase, then your B-phase diode will open up and the A-stage diode will close. The same holds true for the 3 diodes on the negative part of the bus. Therefore, we obtain 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 works in a similar style to a reservoir or accumulator in a plumbing program. This capacitor absorbs the ac ripple and provides a soft dc voltage. The AC ripple on the DC bus is typically significantly less than 3 Volts. Thus, the voltage on the DC bus becomes “around” 650VDC. The real voltage depends on the voltage degree of the AC range feeding the drive, the amount of voltage unbalance on the power system, the electric motor load, the impedance of the energy system, and any reactors or harmonic Variable Speed Motor filters on the drive.
The diode bridge converter that converts AC-to-DC, may also be just referred to as a converter. The converter that converts the dc back to ac is also a converter, 
but to tell apart it from the diode converter, it is generally known as an “inverter”.
In fact, drives are a fundamental element of much larger EVER-POWER power and automation offerings that help customers use electrical energy effectively and increase productivity in energy-intensive industries like cement, metals, mining, oil and gas, power generation, and pulp and paper.