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 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 become self-sufficient producers of electricity and increase their revenues by as much as $1 million a year by selling surplus capacity to the local grid.
Pumps operated with variable and higher speed electrical motors provide numerous benefits such as for example greater selection of flow and mind, higher head from a single stage, valve elimination, and energy saving. To accomplish these benefits, nevertheless, extra care must be taken in selecting the correct system of pump, engine, and electronic engine driver for optimum interaction with the procedure system. Successful pump selection requires knowledge of the Variable Speed Motor complete anticipated range of heads, flows, and specific gravities. Electric motor selection requires appropriate thermal derating and, sometimes, a complementing of the motor’s electrical feature to the VFD. Despite these extra design considerations, variable acceleration pumping is becoming well accepted and widespread. In a straightforward manner, a discussion is presented on how to identify the huge benefits that variable velocity offers and how exactly to select components for trouble free, reliable operation.
The first stage of a Adjustable Frequency AC Drive, or VFD, is the Converter. The converter can be made up of six diodes, which act like check valves found in plumbing systems. They allow current to movement in only one direction; the path proven by the arrow in the diode symbol. For example, whenever A-phase voltage (voltage is comparable to pressure in plumbing systems) is more positive than B or C stage voltages, then that diode will open up and allow current to flow. When B-phase turns into more positive than A-phase, then the B-phase diode will open and the A-phase diode will close. The same is true for the 3 diodes on the negative aspect of the bus. Hence, 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 delivers a soft 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 “around” 650VDC. The actual voltage depends on the voltage level of the AC line feeding the drive, the amount of voltage unbalance on the energy system, the motor load, the impedance of the energy program, and any reactors or harmonic filters on the drive.
The diode bridge converter that converts AC-to-DC, is sometimes just referred to as a converter. The converter that converts the dc back again to ac can be a converter, but to distinguish it from the diode converter, it is generally known as an “inverter”.

Actually, drives are a fundamental element of much bigger 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.