A few of the improvements achieved by EVER-POWER drives in energy effectiveness, productivity and procedure control are truly remarkable. For example:
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 vegetation throughout Central America to be self-sufficient producers of electrical energy and boost their revenues by as much as $1 million a year by selling surplus power to the local grid.
Pumps operated with variable and higher speed electric motors provide numerous benefits such as for example greater Variable Speed Electric Motor selection of flow and head, higher head from a single stage, valve elimination, and energy conservation. To accomplish these benefits, however, extra care should be taken in choosing the appropriate system of pump, motor, and electronic motor driver for optimum interaction with the procedure system. Effective pump selection requires knowledge of the full anticipated range of heads, flows, and specific gravities. Electric motor selection requires appropriate thermal derating and, sometimes, a complementing of the motor’s electrical characteristic to the VFD. Despite these extra design considerations, variable quickness pumping is now well recognized and widespread. In a straightforward manner, a dialogue is presented about how to identify the huge benefits that variable rate offers and how exactly to select components for trouble free, reliable operation.
The first stage of a Variable 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 allow current to circulation in mere one direction; the path demonstrated by the arrow in the diode symbol. For example, whenever A-stage voltage (voltage is comparable to pressure in plumbing systems) is certainly more positive than B or C phase voltages, after that that diode will open up and invite current to circulation. When B-stage becomes more positive than A-phase, then the B-phase diode will open up and the A-phase diode will close. The same holds true for the 3 diodes on the negative part of the bus. Therefore, 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 fashion 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 less than 3 Volts. Thus, the voltage on the DC bus becomes “around” 650VDC. The real voltage will depend on the voltage level of the AC collection feeding the drive, the amount of voltage unbalance on the energy system, the 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, is sometimes 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 usually referred to as an “inverter”.

In fact, drives are a fundamental element of much larger EVER-POWER power and automation offerings that help customers use electricity effectively and increase productivity in energy-intensive industries like cement, metals, mining, oil and gas, power generation, and pulp and paper.