Some of the improvements achieved by EVER-POWER drives in energy efficiency, 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 allow 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 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 achieve these benefits, nevertheless, extra care must be taken in choosing the correct system of pump, electric motor, and electronic motor driver for optimum conversation with the process system. Effective pump selection requires knowledge of the full anticipated range of heads, flows, and specific gravities. Engine selection requires suitable thermal derating and, at times, a matching of the motor’s electrical characteristic to the VFD. Despite these extra design factors, variable acceleration pumping is becoming well accepted and widespread. In a straightforward manner, a debate is presented on how to identify the huge benefits that variable velocity 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 can be made up of six diodes, which act like check valves used in plumbing systems. They enable current to movement in only one direction; the path proven by the arrow in the diode symbol. For instance, whenever A-phase voltage (voltage is comparable to pressure in plumbing systems) is usually more positive than B or C phase voltages, after that that diode will open up and allow current to stream. When B-stage 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 part of the bus. Thus, we get six current “pulses” as each diode opens and closes.
We can eliminate the AC ripple on the DC bus by adding a capacitor. A Variable Speed Motor capacitor works in a similar fashion to a reservoir or accumulator in a plumbing program. This capacitor absorbs the ac ripple and provides a smooth dc voltage. The AC ripple on the DC bus is normally significantly less than 3 Volts. Hence, the voltage on the DC bus becomes “approximately” 650VDC. The actual voltage will depend on the voltage level of the AC collection feeding the drive, the level of voltage unbalance on the energy system, the electric 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, is sometimes just known 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 larger EVER-POWER power and automation offerings that help customers use electricity effectively and increase productivity in energy-intensive industries like cement, metals, mining, coal and oil, power generation, and pulp and paper.