Some of the improvements attained 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 also have slice the company’s annual carbon footprint by 500 metric tons.
EVER-POWER medium-voltage drive systems allow sugar cane plants throughout Central America to be self-sufficient producers of electricity and enhance their revenues by as much as $1 million a calendar year by selling surplus capacity to the local grid.
Pumps operated with adjustable and higher speed electric motors provide numerous benefits such as for Variable Speed Electric Motor example greater range of flow and head, higher head from a single stage, valve elimination, and energy conservation. To achieve these benefits, however, extra care should be taken in selecting the appropriate system of pump, motor, and electronic motor driver for optimum conversation with the procedure system. Successful pump selection requires knowledge of the complete anticipated selection of heads, flows, and particular gravities. Electric motor selection requires suitable thermal derating and, sometimes, a matching of the motor’s electrical characteristic to the VFD. Despite these extra design factors, variable quickness pumping is becoming well accepted and widespread. In a straightforward manner, a discussion is presented on how to identify the huge benefits that variable acceleration offers and how exactly to select elements for trouble 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 flow in only one direction; the path proven by the arrow in the diode symbol. For example, whenever A-phase voltage (voltage is similar to pressure in plumbing systems) is usually more positive than B or C phase voltages, then that diode will open and invite current to flow. When B-stage turns into more positive than A-phase, then your B-phase diode will open and the A-phase diode will close. The same is true for the 3 diodes on the negative side of the bus. Therefore, we obtain 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 operates in a similar fashion to a reservoir or accumulator in a plumbing program. This capacitor absorbs the ac ripple and delivers a easy dc voltage. The AC ripple on the DC bus is typically significantly less than 3 Volts. Thus, the voltage on the DC bus becomes “approximately” 650VDC. The real voltage will depend on the voltage degree of the AC series feeding the drive, the level of voltage unbalance on the energy system, the 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, may also be just referred to as a converter. The converter that converts the dc back to ac is also a converter, but to tell apart it from the diode converter, it is generally known as an “inverter”.
Actually, drives are an integral part 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.