A few 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 cut the company’s annual carbon footprint by 500 metric tons.
EVER-POWER medium-voltage drive Variable Speed Electric Motor systems enable 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 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 selection of flow and mind, higher head from a single stage, valve elimination, and energy saving. To accomplish these benefits, nevertheless, extra care should be taken in choosing the correct system of pump, electric motor, and electronic motor driver for optimum conversation with the procedure system. Effective pump selection requires knowledge of the full anticipated selection of heads, flows, and specific gravities. Engine selection requires appropriate thermal derating and, at times, a coordinating of the motor’s electrical feature to the VFD. Despite these extra design considerations, variable acceleration pumping is becoming well approved and widespread. In a straightforward manner, a debate is presented on how to identify the benefits that variable speed offers and how to select parts for hassle free, reliable operation.
The first stage of a Variable Frequency AC Drive, or VFD, is the Converter. The converter is usually comprised of six diodes, which are similar to check valves used in plumbing systems. They enable current to stream in only one direction; the path proven by the arrow in the diode symbol. For instance, whenever A-phase voltage (voltage is similar to pressure in plumbing systems) is usually more positive than B or C phase voltages, after that that diode will open up and invite current to circulation. When B-phase becomes 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 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 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 simple dc voltage. The AC ripple on the DC bus is typically significantly less than 3 Volts. Thus, the voltage on the DC bus turns into “approximately” 650VDC. The actual voltage will depend on the voltage degree of the AC line feeding the drive, the amount of voltage unbalance on the power system, the engine 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, may also be just referred to as a converter. The converter that converts the dc back to ac can be a converter, but to tell apart it from the diode converter, it is normally referred to 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.