Variable Speed
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The function of speed drives within control systems
Modern production plants utilise high-tech, complex machinery with adjustable drive systems. The function of these is to control the speed, velocity, torque and rotational direction of machinery. Within their operating range, an infinite number of speeds can be selected, allowing the operator to fine tune the process to a very high standard. Variable speed control systems allow operators to adapt machines for various tasks, to improve the quality of the end product, or to slow down production for safety reasons or quality control checks.
This adaptability is of particular use in machine shops. Machine tools such as lathes are used to produce a range of different sized products, often to specific criteria and in short runs. Small diameter items are run at high speed, and large diameters at low speeds, to facilitate optimum use of the cutting tools.
Printing presses also utilise variable speed. Inks, paper weight and paper coatings all affect the quality of the end product. Controlling the speed allows printing technicians to choose the speed that will give the best quality for the products they are using at the time, and means the same press can be used for many different applications. Plus, controlled acceleration allows for smooth operation of the press, which prevents breakage of the paper.
Controlled speed is also important in water supply systems. During times of low usage, pumps need only run fast enough to sustain pressure. During daytime and early evening hours, the pumps must run a lot faster to provide for the needs of residents.
The earliest adjustable drive systems were mechanically or hydraulically controlled. Today, industrial drives are electrical – powered by AC or DC motors. The earliest electric control systems were DC powered. Today, AC drives have largely taken over, although DC drives remain popular.
We at Iconsys are a leading provider of variable speed DC and AC drives.
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Lowing Your Operating Costs In Motor Control With Frequency Inverters (Variable Frequency Drives)
Variable frequency drives (VFDs, also known as adjustable speed drives, frequency inverters) are reliable industrial devices that control single-phase or three-phase electric motor speed. Frequency inverters (frequency converters, frequency changers) are widely used in building automation, industrial, pumping, agricultural, irrigation, and water/wastewater applications to control the speed of fans and pumps in various systems in the industry. Our company GreenDriv Tech Limited offers cost-effective motor control solutions What's the benefit of applying our variable speed drives in motor control solutions? Generally the payback period is less than three years, even may be less than one year.
Reducing energy cost is well known for ac drives in motor control. But ac drives (variable speed drives) do more than we thought, including, but not limited:
1. reduce fan noise and duct rumble, thus reducing tenant complaints.
2. reduce amps during motor starting, lowering demand charges; That's another significant part of the electric bill.
3. less expensive to maintain, which is better than mechanical controls in the industry.
4. inherent soft-starting, thus reducing wear and tear on motors, sheaves, belts, couplings, and other system components.
5. provide accurate and repeatable control of HVAC(Heating,Ventilation and Air conditioning) settings, thus eliminating frequent readjustments.
Are not sure if you need our Variable frequency drives (VFDs, adjustable speed drives, frequency inverters)? If you say "yes" to one of some questions below, you may wasting your energy and money and may need to consider to apply now.
1. Do you have ac motors in your facility?
2. Do you use traditional mechanical means to vary the output of the motors?
In the world about 50% of the total electrical energy generated is consumed by rotating equipment. About 65% of the total is consumed by centrifugal or flow related applications such as fans, blowers, compressors, pumps. Variable speed drive (VSD, VFD, vvvf drive) technology offers a cost-effective method to match driver speed to load demands, and represents a state-of-the-art opportunity to reduce operating costs and improve overall productivity. Don't hesitate to get variable speed drives with reliable peformance and cost-effecience now.
About the Author
Richard, professional in marketing, sales.
Worked for GreenDriv Tech Limited Professional supplier of frequency inverters, frequency changers, ac drives, adjustable speed drives with cost-effective and high performance.
