A few of the improvements attained by EVER-POWER drives in energy effectiveness, productivity and procedure control are truly remarkable. For example:
The savings are worth about 
$110,000 a year and also 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 become self-sufficient producers of electricity and boost their revenues by as much as $1 million a 12 months by selling surplus capacity to the local grid.
Pumps operated with adjustable and higher speed electric motors provide numerous benefits such as for example greater selection of flow and head, higher head from a single stage, valve elimination, and energy conservation. To achieve these benefits, nevertheless, extra care should be taken in selecting the correct system of pump, engine, and electronic motor driver for optimum conversation with the process system. Effective pump selection requires understanding of the full anticipated selection of heads, flows, and specific gravities. Electric motor selection requires appropriate thermal derating and, at times, a complementing of the motor’s electrical characteristic to the VFD. Despite these extra design factors, variable rate pumping is becoming well approved and widespread. In a Variable Speed Electric Motor straightforward manner, a discussion is presented about how to identify the benefits that variable acceleration offers and how to select elements for trouble free, reliable operation.
The first stage of a Adjustable Frequency AC Drive, or VFD, is the Converter. The converter is definitely made up of six diodes, which act like check valves found in plumbing systems. They allow current to circulation in only one direction; the direction demonstrated by the arrow in the diode symbol. For instance, whenever A-phase voltage (voltage is similar to pressure in plumbing systems) can be more positive than B or C stage voltages, after that that diode will open and allow current to circulation. When B-phase turns into more positive than A-phase, then the B-phase diode will open up and the A-stage diode will close. The same is true for the 3 diodes on the negative side of the bus. Hence, 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 works in a similar fashion to a reservoir or accumulator in a plumbing system. This capacitor absorbs the ac ripple and provides a even dc voltage. The AC ripple on the DC bus is typically significantly less than 3 Volts. Hence, the voltage on the DC bus becomes “around” 650VDC. The actual voltage depends on the voltage level of the AC range feeding the drive, the level of voltage unbalance on the power system, the motor load, the impedance of the energy system, and any reactors or harmonic 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 again to ac can be a converter, but to tell apart it from the diode converter, it is normally 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 electrical energy effectively and increase productivity in energy-intensive industries like cement, metals, mining, oil and gas, power generation, and pulp and paper.