A few of the improvements achieved by EVER-POWER drives in energy efficiency, productivity and process control are truly remarkable. For example:
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 vegetation throughout Central America to become Variable Speed Motor self-sufficient producers of electrical energy and increase 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 electric motors provide numerous benefits such as for example greater selection of flow and head, higher head from an individual stage, valve elimination, and energy saving. To achieve these benefits, nevertheless, extra care should be taken in selecting the correct system of pump, engine, and electronic engine driver for optimum conversation with the procedure system. Effective pump selection requires understanding of the full anticipated range of heads, flows, and particular gravities. Motor selection requires appropriate thermal derating and, sometimes, 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 about 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 Variable Frequency AC Drive, or VFD, is the Converter. The converter is usually made up of six diodes, which are similar to check valves used in plumbing systems. They allow current to circulation in only one direction; the path shown 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 stream. When B-stage turns into more positive than A-phase, then the B-phase diode will open up and the A-phase diode will close. The same is true for the 3 diodes on the negative part 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 operates in a similar fashion to a reservoir or accumulator in a plumbing system. This capacitor absorbs the ac ripple and delivers a simple dc voltage. The AC ripple on the DC bus is normally less than 3 Volts. Hence, the voltage on the DC bus turns into “approximately” 650VDC. The actual voltage depends on the voltage degree of the AC range feeding the drive, the level of voltage unbalance on the energy system, the engine 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 known 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”.

In fact, drives are a fundamental element 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, coal and oil, power generation, and pulp and paper.