Some of the improvements achieved by EVER-POWER drives in energy performance, productivity and process 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 electrical energy and enhance their revenues by as much as $1 million a year by selling surplus power to the local grid.
Pumps operated with adjustable and higher speed electrical motors provide numerous benefits such as greater selection of flow and head, higher head from an individual stage, valve elimination, and energy saving. To accomplish these benefits, nevertheless, extra care must be taken in choosing the correct system of pump, electric motor, and electronic engine driver for optimum interaction 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 feature to the VFD. Despite these extra design considerations, variable speed pumping is becoming well recognized and widespread. In a straightforward manner, a discussion is presented on how to identify the benefits that variable swiftness offers and how exactly to select Variable Speed Electric Motor elements for hassle 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 are similar to check valves found in plumbing systems. They enable current to stream in mere one direction; the path demonstrated 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 stage voltages, after that that diode will open up and invite current to movement. When B-stage becomes more positive than A-phase, then your B-phase diode will open up and the A-phase diode will close. The same is true for the 3 diodes on the negative side 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 capacitor functions in a similar fashion to a reservoir or accumulator in a plumbing program. This capacitor absorbs the ac ripple and provides a simple dc voltage. The AC ripple on the DC bus is normally significantly less than 3 Volts. Hence, the voltage on the DC bus turns into “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 power 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 again to ac is also a converter, but to distinguish it from the diode converter, it is usually referred to as an “inverter”.

Actually, 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.