Some of the improvements attained by EVER-POWER drives in energy efficiency, productivity and procedure 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 systems allow sugar cane vegetation throughout Central America to become self-sufficient producers of electrical energy and boost their revenues by as much as $1 million a 12 months by selling surplus capacity to the local grid.
Pumps operated with adjustable and higher speed electrical motors provide numerous benefits such as greater range of flow and mind, higher head from an individual stage, valve elimination, and energy conservation. To achieve these benefits, however, extra care must be taken in selecting the correct system of pump, electric motor, and electronic engine driver for optimum interaction with the process system. Successful pump selection requires knowledge of the full anticipated selection of heads, flows, and particular gravities. Electric motor selection requires appropriate thermal derating and, sometimes, a coordinating of the motor’s electrical feature to the VFD. Despite these extra design considerations, variable speed pumping is now well approved and widespread. In a straightforward manner, a dialogue is presented on how to identify the benefits that variable quickness offers and how to select components for hassle free, reliable operation.
The first stage of a Variable Frequency AC Drive, or VFD, is the Converter. The converter is comprised of six diodes, which act like check valves found in plumbing systems. They allow current to movement in mere one direction; the direction proven by the arrow in the diode symbol. For example, whenever A-stage voltage (voltage is comparable to pressure in plumbing systems) is usually more positive than B or C phase voltages, then that diode will open up and allow current to circulation. When B-stage becomes more positive than A-phase, then your B-phase diode will open up and the A-stage diode will close. The same holds true for the 3 diodes on the negative aspect of the bus. Thus, 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 style to a reservoir or accumulator in a plumbing system. This capacitor absorbs the ac ripple and provides a smooth dc voltage. The AC ripple on the DC bus is normally significantly less than 3 Volts. Hence, the voltage on the DC bus turns into “approximately” 650VDC. The actual voltage will depend on the voltage level of the AC collection feeding the drive, the level of voltage unbalance on the power system, the motor 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 is also a converter, but to distinguish it from the diode converter, it is normally referred to as an “inverter”.

In fact, drives are a Variable Speed Motor fundamental element of much bigger 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.