A few 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 Variable Speed Electric Motor systems enable sugar cane plants throughout Central America to be self-sufficient producers of electricity and enhance their revenues by as much as $1 million a season by selling surplus capacity to the local grid.
Pumps operated with variable and higher speed electric 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 selecting the correct system of pump, motor, and electronic electric motor driver for optimum conversation with the procedure system. Effective pump selection requires understanding of the complete anticipated selection of heads, flows, and specific gravities. Electric motor selection requires suitable thermal derating and, at times, a matching of the motor’s electrical feature to the VFD. Despite these extra design considerations, variable rate pumping is now well approved and widespread. In a straightforward manner, a conversation is presented on how to identify the huge benefits that variable swiftness offers and how exactly to select parts for hassle free, reliable operation.
The first stage of a Adjustable Frequency AC Drive, or VFD, is the Converter. The converter can be comprised of six diodes, which are similar to check valves used in plumbing systems. They allow current to movement in mere one direction; the direction shown by the arrow in the diode symbol. For example, whenever A-stage voltage (voltage is comparable to pressure in plumbing systems) is more positive than B or C phase voltages, after that that diode will open and invite current to circulation. When B-phase turns into more positive than A-phase, then your 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 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 even dc voltage. The AC ripple on the DC bus is typically significantly less than 3 Volts. Therefore, the voltage on the DC bus becomes “around” 650VDC. The real voltage will depend on the voltage degree of the AC series feeding the drive, the level of voltage unbalance on the power 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, may also be just referred to as a converter. The converter that converts the dc back to ac is also a converter, but to distinguish it from the diode converter, it is generally known as an “inverter”.

Actually, 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.