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 vegetation throughout Central America to become self-sufficient producers of electricity and enhance their revenues by as much as $1 million a 12 months by selling surplus power to the local grid.
Pumps operated with variable and higher speed electrical motors provide numerous benefits such as greater range of flow and mind, 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, engine, and electronic engine driver for optimum conversation with the procedure system. Effective pump selection requires knowledge of the complete anticipated range of heads, flows, and specific gravities. Electric motor selection requires suitable thermal derating and, sometimes, a matching of the motor’s electrical characteristic to the VFD. Despite these extra design considerations, variable velocity pumping is becoming well accepted and widespread. In a straightforward manner, a discussion is presented about how to identify the huge benefits that variable quickness offers and how to select components for trouble free, reliable operation.
The first stage of a Variable Frequency AC Drive, or VFD, may be the Converter. The converter is certainly made up of six diodes, which act like check valves used in plumbing systems. They allow current to movement in only one direction; the direction demonstrated by the arrow in the diode symbol. For instance, whenever A-phase voltage (voltage is similar to Variable Speed Electric Motor pressure in plumbing systems) is more positive than B or C stage voltages, then that diode will open up and invite current to circulation. When B-stage becomes more positive than A-phase, then the B-phase diode will open and the A-stage diode will close. The same is true for the 3 diodes on the negative part of the bus. Thus, we obtain six current “pulses” as each diode opens and closes.
We can eliminate 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 even dc voltage. The AC ripple on the DC bus is typically less than 3 Volts. Hence, the voltage on the DC bus turns into “around” 650VDC. The actual voltage will depend on the voltage degree 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 program, and any reactors or harmonic filters on the drive.
The diode bridge converter that converts AC-to-DC, is sometimes just known 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 usually referred to as an “inverter”.
In fact, drives are an integral part 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.