- New Company Develops Portable Water Purifiers
- Industrial Motors and Electrical Motors Now Bought and Sold On Industrial Leaders
- Solar generator eliminates pollution & noise
- Energy Saving High-Speed And Power Motors
- Dc motors deliver higher performance and efficiency
- Ac motors cope better in harsh environments
- Plug and play with iCar
- Sensorless interior permanent magnet synchronous motor drive system with a wide adjustable speed range
April 25, 2009
An Alderson company plans to produce portable water purification units.
Few people would be likely to drink water straight from the Kanawha River.
But earlier this month, W.A. "Butch" Thornton spent part of the day doing just that.
The water he pumped out of the river at Charleston's Haddad Riverfront Park, however, tasted as clean and fresh as any you would get out of a tap. Thornton demonstrated his new mobile self-contained potable water sterilization unit for emergency services and homeland security officials.
"It uses a deep well pump and it runs off a generator," Thornton said. "... The water goes into a tank in the trailer, goes through a centrifugal separator to remove particles."
The water then flows through a series of carbon filters, ultraviolet light and chlorinator units, he said. The UV lights kill any bacteria that make it through the initial filters.
The trailer has plenty of space to carry a portable generator and hoses.
Most water sterilization units are much larger than the one Thornton developed. Most cars, trucks or even ATVs, he said, can tow his version.
It can pump up to 15 gallons of water per minute and 20,000 gallons per day, Thornton said.
Thornton developed the idea for the sterilization unit last year and built the prototype in November 2008, he said. Officials with the city of Beckley were impressed with the unit and gave him more ideas.
"Everybody liked it," he said.
Thornton owns Gappa Valley Plumbing LLC of Gap Mills,and works in sales for Only Way Water LLC of Alderson. He worked with Only Way Water's owner Alan Truman on the sterilization unit project from the beginning, he said. They intend to establish a new business called Rolling Camel LLC to build and market the units, Truman said.
"We're waiting for a state permit," he said. "We've exceeded their requirements."
The units will be built in Alderson, Truman said.
And the market for the sterilization units is a big one, Thornton said. Emergency workers could use them in areas hit with flooding or any other situation where drinking water is needed. And the Rolling Camel could be used after floodwaters recede, too, to help with the clean up.
"You can mix more chlorine and use it for cleanup water," Thornton said.
And the system's versatility could make it appealing to firefighters. The Rolling Camel is capable of producing foam to help fight certain kinds of fires, he said
To increase reliability, the unit is equipped with redundant systems, Thornton said. The carbon filters and UV lights can be changed without interrupting the flow of fresh drinking water.
May 03, 2009
American Industrial Directory IndustrialLeaders.com has debuted its new Industrial Electric Motors Buying Guide featuring manufacturers and distributors of various industrial motors and components.
Buy American, a social networking site published by Industrial Leaders for the U.S. manufacturing community to promote American industrial goods overseas introduced today its new Industrial Motors & Electrical Motors Directory and Buying Guide The publication connects buyers and suppliers of all kinds of new, used and re-manufactured electric motors for commercial, industrial, construction, utility, power equipment and other applications.
According to Sean Murray, spokesman for Industrial Leaders, the Industrial Electric Motors Guide includes offerings for AC-DC motors, brake, reversible, servo, linear, adjustable speed drive, brushless electrical motors, torque, synchronous, induction electromagnetic, DC electrical motors, rotary actuators, gearmotors and allied products, Murray said the guide enables companies to post offerings to buy and sell Industrial Electric Motors through the company's online marketplace.
"Buy American's new industrial motors directory was created to help U.S. manufacturers of electrical motors connect with national and international MRO professionals and others in the market for motion control solutions," said Murray. He concluded, "In addition to its selection of industrial motor products the publication also provides access to suppliers of shafts, drives, bearings, clutches, rotors, filters, governors, controls, shut-off switch, valves and other electrical motor components and accessories."
Sources from: http://www.carzunlimited.com/news/news/general/2140/industrial-motors-and-electric.html
Apr 16, 2009
BOCA RATON, FL -- Silence isn't usually what you hear when you turn on a generator. When you step into the showroom at the Power Ready offices in Boca though, appliances are running every day, all of which are being powered by a generator that doesn't make a sound.
"You don't have to worry about fuel, you don't have to worry about installation, you don't have to worry about taxes going up, about maintenance," says Bill Dato with Power Ready International.
The small black generator essentially runs on batteries. The unit is charged when it's plugged in, and then can operate for days when the electricity is off. The concept isn't new, but Dato's company is packaging it so homeowners can use the technology with a portable device. That means no gas, and no carbon monoxide.
"It's nice not to pollute your air, or worry about your kids being blown up because you've forty or fifty gallons of fuel in your shed or garage," says Dato.
You can also purchase solar panels which help supplement power during an outage. With three solar panels you can essentially run the generator for weeks, but you can't run your whole house.
The unit is only set up to power what you need most, and stores electricity like a bank. For big energy drainers like an A-C or a hot water heater, you'd still need an outdoor stationary unit.
A unit big enough to power your whole house however can cost tens of thousands of dollars, so Dato suggests buying their portable unit which you can take with you and which can power a chunk of appliances. He then says you can buy a cheaper, smaller stationary generator for your home which would only power your A-C.
"When you use this system in tandem with something like that, you can do something for the environment, save on maintenance, save on installation and not have all the noise and headaches of installing a big stand-by system."
Sources from: http://www.wptv.com/news/local/story/Solar-generator-eliminates-pollution-noise/RAdgwbjZ3Ea761U3N9B7vg.cspx
April 15, 2009
Albany, NY-A series of variable speed, high power, synchronous and asynchronous motors using a compliant foil gas bearing rotor support system has been developed by MiTi. Power levels for the five standard models range from 3.5 to 75 kW at rated speeds from 60,000 to 120,000 rpm. Efficient, maintenance free operation is made possible through the combination of MiTi's 4th generation compliant foil gas bearings and either high efficiency permanent magnet or induction motor elements. By using gas foil bearings the need for an oil lubrication system and the associated maintenance and oil disposal are all eliminated. MiTi's Korolon lubricious and wear resistant bearing coating assures low starting torque and long life for both intermittent start/stop and continuous operation. Custom motor designs are also available for specific performance or size requirements ranging from sub kilowatt to several hundred kilowatts. Applications include pumps, blowers, aerospace and aircraft equipment, compressors, and applications that require high quality, high performance rotating machinery equipment.
Sources from: http://www.aerospaceonline.com/article.mvc/Energy-Saving-High-Speed-And-Power-Motors-0001?VNETCOOKIE=NO
Dc motors are increasing in popularity due to their performance advantages over ac motors for applications ranging from high-speed automation to electric motorbikes. Jon Severn reports on a selection of recent developments in dc motors and drives.
Three-phase ac induction motors are the most common type of motor used in industrial application, due largely to their simple design, low purchase cost, reliability and broad choice of sizes and specifications. However, for applications where speed needs to be varied or torque needs to be controlled with high accuracy, brushed dc motors are popular. Where even higher performance and/or reliability are required, brushless dc motors overcome the drawbacks often associated with brushed dc motors.
As well as industrial applications, brushed and brushless dc motors are also employed in smaller machines and equipment where speed control is critical - such as computer hard disk drives - or in battery-powered, automotive and other applications where a dc supply is readily available. It should also be remembered that brushless dc motors are non-sparking and therefore do not generate ozone, which makes them suitable for use in medical applications. Compared with brushed dc motors, brushless types have the further advantage of producing less electrical noise.
Today there are several factors behind the rising demand for dc motors. For example, cars are being offered with more powered devices, plus designers are seeking to improve the performance of the equipment they design, which often entails upgrading from an ac motor to a dc motor. In particular, coreless (ironless) dc motors have low inertia so are useful where high accelerations are required. Interest in alternative energy sources often results in a high-efficiency dc motor being used for the final drive.
For example, the prototype ENV motorbike from Intelligent Energy features a fuel cell that generates electrical energy from hydrogen and oxygen. To make the best use of the limited supply of electrical energy, the bike is equipped with a high-efficiency Lynch axial-gap dc motor. This type of low-voltage, high-torque, permanent-magnet dc motor has the added advantage of a high power density. Lynch motors are today manufactured in the UK by the Lynch Motor Company in three frame sizes and with numerous options. Alternatively two motors can be coupled together to drive a single output shaft, thereby increasing the power available. To illustrate the motors' capability, the LEM 130 model 95s has a rated power of 3.02kW, rated torque of 4.35Nm and rated speed of 6624rpm. Peak efficiency is 87 per cent. For more demanding applications, the LEM 200 model D135 has a rated power of 14.39kW, rated torque of 36.4Nm and rated speed of 3780rpm. Peak efficiency for this model is 90 per cent.
Sources from: http://www.engineerlive.com/Design-Engineer/Motors_and_Drives/Dc_motors_deliver_higher_performance_and_efficiency/21559/
Rotor (UK) is launching the new, high-specification Rotor NL range of 'standard' AC motors for use in demanding processing and pharmaceutical applications. The new Rotor range is designed and manufactured in Europe to a very high specification, making it suitable for applications that are too tough for conventional 'standard' models to reach their full operating life.
The highly robust design includes cast iron construction (from frame sizes 100 upwards), high-integrity seals and oversized bearings; these features ensure greater reliability and improved motor life in harsh working environments. Rotor believes there is a large part of the motor market that requires a better quality motor at a highly competitive price.
Commenting upon the launch of the Rotor NL range, Jerry Hodek, managing director of Rotor (UK), says: "At Rotor we want to ensure that our standard range of motors is the best available, allowing our 'standard' Rotor NL motors to be used with confidence in harsh operating environments. As a manufacturer we are also able to deliver modifications at very short notice, making our motors suitable for most applications. Our motors are also accredited to all major quality standards, allowing them to be fitted with complete confidence to any processing application."
The Rotor NL range is available in frame sizes up to 315, and certain sizes come with larger bearings than standard motors. The motors are readily available in face-, flange- and foot-mounted options from a large stock held by Rotor.
Rotor UK can also meet special demands at short notice. These can include special shafts and customised motors to provide additional security from harsh conditions, including epoxy protective coatings, ATEX certification, and increased ingress protection to IP56.
Sources from: http://www.engineerlive.com/Design-Engineer/Motors_and_Drives/AC_motors_cope_better_in_harsh_environments/21572/
Mar 8, 2009
It was never intended to be an electric car, but the i-Car's mid-rear engined platform was ideal for packaging batteries and an electric motor, so Mitsubishi created one anyway, explains DAVE MOORE. Within 50 silent, almost ethereal metres, the penny well and truly dropped. With my personal road-going smug meter spiking, and shining as brightly as the blue "charging" segment of the i-MIEV's dash display, I realised that I could genuinely live with an electric car after all. With little road noise, no wind flurry and an engine note that appeared to have been put on mute, the little red and white Mitsubishi held more than its own among bullying delivery vans, blind cab- drivers - one in a brand-new hybrid, I note - and through the busy, serpentine importance of our capital city. It's so hushed that I also realised pretty quickly that I'd need to drive assuming that pedestrians and cyclists would never hear me coming, and might dash and wobble into my path without looking - just as they do in those road safety ads. Since you ask, Mitsubishi's i-MIEV is also pretty brisk - quicker than the high-revving wee 660cc turbocharged petrol version - whizzing (quite literally) to 100kmh in just under 10 seconds by my seat- of-the-pants rating. But it's so uncannily quiet that you're never really sure what speed you're doing without noting the digital odometer, although I expect that you'll get to gauge speeds pretty well before too long, as I did. You'll need to, with all those jay-walkers and jay-pedallers about. Possibly the most awkward part of Mitsubishi's new plug-and-play car is its name. Its distributors call it the "eye-meeve" and when the initials i-MIEV stand for i-Mitsubishi Innovative Electric Vehicle, I can see why they use the shortened version. Everything else is simple. You drive the i-MIEV pretty much as you would a conventional automatic motor car, although there are two settings besides "D" in the transmission lever's quadrant. There's "Eco" which restricts the outright power available from the electric motor and allows a slight increase in its "engine braking" effect when backing off the right pedal. When you do back off, that engine braking or decelerative energy is directed to the underfloor battery pack and saved for use later. The third setting is "B" - for braking - and when selected, it too gives you some extra off-throttle braking, but this time without affecting outright electric power access. The underfloor batteries and electric motor make the i-MIEV look as if it was always intended to be an electric car, but it wasn't. However, Mitsubishi saw that the batteries could go exactly where the old fuel tank went, under the seats, while an electric motor could go where the triple-cylinder petrol engine used to live, under the rear hatch space - with no compromise at all. So no all-new platform was needed, and the i-MIEV could go from first idea to production vehicle in not much more than two years. Mitsubishi has eschewed the conventional wisdom of nickel-metal hydride batteries for state-of-the-art lithium-ion type and promises that future developments could see Li-ion cells occupy even less space and offer less weight than they already do under the floor of the i-MIEV, with a much greater range than the current - no pun intended - car, which can manage 160-odd km from a single seven-hour charge from a modified domestic plug. In some markets the i-MIEV can be charged to 80 per cent of its total in just 30 minutes by using a quick- charge set-up. Smaller, lighter and more powerful, batteries are being co- developed by Mitsubishi and GS Yuasa and when a mass-produced I-MIEV is ready in 2010 we should see advances in this area. Mitsubishi New Zealand says that if you do your plugging-in at night to take advantage of lower cost electricity, it will cost you about $3.50 for a full "tank" of electricity - or about the same price as a 330ml bottle of water. The exact emissions savings are all dependent on where your electricity comes from. In Japan or France where nuclear power dominates, the i-MIEV is rated at about 28g/km of CO2 - or about a quarter of the very best hybrids. In New Zealand, with coal-fired stations, flooded valleys, wind power and geothermal sources adding to the equation, it'll be a bit more than that, but still a fraction of conventional and even petrol-electric vehicles. The i-MIEV is about 180kg heavier than the petrol donor car, but you don't feel it, as despite having identical power output to the standard i-car, with 47kW on tap, the electric car fronts up with almost twice the torque at 180Nm and all of that torque is available from revolution one - there's no peak or dwell to speak of. So it's best to move off on a "soft" throttle until you get used to the i-MIEV's uncanny responsiveness, which is immediate and almost absolutely silent. Mitsubishi has built some "creep" into the system so when you come off the brakes, the car eases forward - like a conventional automatic does - and you can just use the brakes to manage low-speed manoeuvres. Mounting the Li-ion battery pack under the floor has other benefits besides intelligent packaging. Mounted under the cabin floor, the batteries put their weight very low down in the car, while the frame that contains the gang of 22 cell packs appears to torsionally stiffen the whole vehicle. This first makes itself felt by way of an increase in heft through the steering wheel which reflects the feel of a larger and heavier car. Then there's the advantageous change in the sprung to unsprung weight ratio which means the i-MIEV rides much more comfortably than the twitchy and rather firm i-Car from which it gets its underpinnings. On top of all that, the distribution of the battery weight means that the i-MIEV lacks the initial understeer of its petrol sibling, giving the driver far more confidence, for the whole car feels much more predictable and neutral as it goes about its commuter duties. And it will be commuting that will be the i-MIEV's tour de force. Even when its range is extended beyond the current 160km, the Mitsubishi won't be the car you'll use for inter-city or extended country driving. It's quite quick and nimble enough to keep you out of your regular car or SUV during the week and when pottering about at weekends. However, when family holidays come up you might well have saved sufficiently in running costs to rent a larger car for activities requiring several hundred kilometres of open road driving. In the meantime, just note the number of times you do more than 160km in one sitting and unless you're a travelling salesperson I'd wager that it's not that often at all. With only a few dozen so far manufactured, the i-MIEV's likely pricing cannot be realistically nailed at this point. Currency fluctuations and technology costs mean that the i-MIEV could well command a sticker up to three times that of the basic petrol i-Car right now. But as production numbers increase and battery technology improves, the i-MIEV will in all likelihood do a flat-screen TV job on us, by dropping in price very quickly as take-up and production efficiencies increase. It's not perfect, the i-MIEV. Air conditioning use can reduce your range considerably, as can brisk driving. However, it's hard not to feel good about this wee plug-in jellybean of a car.
Sources from: http://www.stuff.co.nz/life-style/motoring/2273663/Plug-and-play-with-iCar
IET Electric Power Applications, March 2009
The authors propose a novel extended flux estimating method for an interior permanent magnet synchronous motor. By using the proposed method, an extended flux can be systematically derived. Then, the shaft position and speed of the motor can be obtained. Starting from a standstill and at a low-speed range control, a current-slope estimating method is used to replace the extended flux method because the estimating extended flux decreases as the motor speed is reduced. By combining the extended flux and the current-slope estimating methods, the interior permanent magnet synchronous motor drive system can be controlled in a wide range with satisfactory performance. The adjustable speed range is from 1 to 2000 r/min. In addition, the system performs fast transient responses and good load-disturbance responses. Moreover, a sensorless position control system has been well developed based on the speed control drive system. A TMS 320LF2407 digital signal processor is used to execute the rotor position estimation, rotor speed estimation, current-loop control, speed-loop control and position-loop control algorithms. The hardware circuit therefore is very simple. Several experimental results are provided to validate the theoretical analysis.
Sources from: http://www.controleng.com/articleXml/LN931153071.html