A few of the improvements attained by EVER-POWER drives in energy efficiency, productivity and process control are truly remarkable. For instance:
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 plant life throughout Central America to be self-sufficient producers of electrical energy and enhance their revenues by as much as $1 million a season 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 range of flow and head, higher head from an individual stage, valve elimination, and energy saving. To achieve these benefits, nevertheless, extra care must be taken in selecting the appropriate system of pump, motor, and electronic engine driver for optimum interaction with the process system. Effective pump Variable Speed Electric Motor selection requires understanding of the full anticipated selection of heads, flows, and particular gravities. Motor selection requires suitable thermal derating and, at times, a complementing of the motor’s electrical feature to the VFD. Despite these extra design considerations, variable speed pumping is becoming well recognized and widespread. In a simple manner, a conversation is presented about how to identify the benefits that variable acceleration offers and how exactly to select parts for hassle free, reliable operation.
The first stage of a Adjustable Frequency AC Drive, or VFD, is the Converter. The converter can be made up of six diodes, which act like check valves used in plumbing systems. They enable current to movement in mere one direction; the direction demonstrated by the arrow in the diode symbol. For instance, 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 and allow current to flow. 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. Therefore, we get 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 functions in a similar style 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 typically less than 3 Volts. Therefore, the voltage on the DC bus turns into “approximately” 650VDC. The actual voltage will depend on the voltage degree of the AC collection feeding the drive, the amount of voltage unbalance on the energy system, the engine 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, is sometimes just referred to as a converter. The converter that converts the dc back again to ac is also a converter, but to distinguish it from the diode converter, it is usually 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.