Some of the improvements attained by EVER-POWER drives in energy effectiveness, productivity and procedure 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 vegetation throughout Central America to be self-sufficient producers of electrical energy and increase their revenues by as much as $1 million a 12 months by selling surplus capacity to the local grid.
Pumps Variable Speed Electric Motor operated with adjustable and higher speed electric motors provide numerous benefits such as greater selection of flow and head, higher head from a single stage, valve elimination, and energy conservation. To achieve these benefits, nevertheless, extra care must be taken in selecting the appropriate system of pump, motor, and electronic engine driver for optimum conversation with the procedure system. Successful pump selection requires understanding of the complete anticipated range of heads, flows, and specific gravities. Motor selection requires suitable thermal derating and, at times, a complementing of the motor’s electrical feature to the VFD. Despite these extra design considerations, variable quickness pumping is becoming well approved and widespread. In a straightforward manner, a discussion is presented on how to identify the benefits that variable quickness offers and how to select parts for hassle free, reliable operation.
The first stage of a Variable Frequency AC Drive, or VFD, is the Converter. The converter is definitely comprised of six diodes, which act like check valves used in plumbing systems. They enable current to stream in only one direction; the path shown by the arrow in the diode symbol. For example, whenever A-phase voltage (voltage is similar to pressure in plumbing systems) is definitely more positive than B or C phase voltages, then that diode will open and allow current to movement. 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 aspect 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 by adding a capacitor. A capacitor functions in a similar style to a reservoir or accumulator in a plumbing program. This capacitor absorbs the ac ripple and delivers a smooth dc voltage. The AC ripple on the DC bus is typically less than 3 Volts. Thus, the voltage on the DC bus turns into “approximately” 650VDC. The actual voltage depends on the voltage level of the AC line feeding the drive, the level of voltage unbalance on the power system, the 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 is also a converter, but to distinguish it from the diode converter, it is generally 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, coal and oil, power generation, and pulp and paper.