CAPACITORS FOR IGBT

Capacitors for IGBT

As a result of many years of research on the modernization of technology MKK, Inc. EPCOS AG introduced its power electronics imeeschee not unique high-tech and high-quality product that fully complies with all current requirements - new series capacitors PCC HPTM (Power Capacitor Compact, High Power). These capacitors are specially designed to be mounted directly to the output terminals of IGBT inverter. The modular design and a special connector between IGBT and PCC HPTM provides a nominal capacity that ensures low inductance circuit and the smooth operation of all types of IGBT inverters. No more having to install additional battery decoupling capacitors, complicating the design and weighting of the power module.

In the development of this series focused on improving the reliability, reduce the cost and increase the service life in the most extreme conditions. Sealed PCC HPTM the capacitor is made of stainless steel and glass-fiber reinforced polyester. This design ensures that no drift capacity with temperature, and meets all standards of fire.

The capacitor does not require maintenance (up to 5 years of continuous operation), and is safe in operation. Precautions to prevent the leakage of oil, with the means of monitoring sensors, fire and explosion, regular preventive and emergency maintenance - no longer required, if selected for the new development series capacitors PCC HPTM. The main areas of application · IGBT Inverter (electrical transport, aviation, mining, etc.) · Electric Industrial (SIV, SVG) · powerful source of pulsed current (pulse generator, laser welding machine, switching power supply) · Increased Benefits lifespan. · Very low self-inductance (less than 40 nH). · High current capacity (over 300 A). · Lack of self-discharge. · Compact housing made of stainless steel, light weight · No need for service · Dry technology (no oil) · Self-Healing (technology SH) · Non-flammable materials (standard NFF).

IBM PRODUCES AN ULTRAFAST TRANSISTOR

IBM produces an ultrafast TRANSISTOR

How soobshaet Battery News America#39;s IBM announced a new transistor that is capable of transmitting data three times faster than any known device.

In the near future, you can create super-fast microchips that could revolutionize the transmission of data over wireless networks, told reporters Baijan Davari, vice president, IBM.

In particular, he said, two years later the company is preparing to market a silicon chip, whose speed will exceed 150 gigahertz. Speed-the-art chips is only about 50 gigahertz.

ALUMINUM ELECTROLYTIC CAPACITORS WITH SCREW TERMINALS

Aluminum Electrolytic Capacitors with screw terminals

· Operating voltage 160:500 V · Range tanks 470:22 000 uF · Operating current up to 100 A · Standard operating temperature of 85 ˚ C and 105 ˚ C and 125 ˚ C • Service life up to 250,000 hours · High permissible surge current · Small deviations from nominal · Low weight and dimensions · production models as the bolt for mounting, and without Environmentally safe electrolyte · Supported standards: IEC 384-1, IEC 384-4, IEC 384 -4-1, DIN 45811 Design Features The main advantage of aluminum capacitors is their high capacitance per unit volume, which provides an excellent quality / price ratio. Aluminum electrolytic capacitors consist of two layers of conductive material separated by a dielectric layer. One electrode (the anode) is made of aluminum foil, applied with the oxide layer plays the role of the dielectric. The effective area of the foil greatly increased by electrochemical etching, thus achieving the maximum possible capacity and small package size.

The negative electrode (cathode) is a conductive liquid - an electrolyte and a second layer of foil is used as a contact surface for the passage of current thereto. Repetitive cycles (discharge / charge) lead to a sharp decrease in capacity. However, thanks to the special design of capacitors manufactured by concern EPCOS AG, for 1 million cycles of their capacity is reduced by at least 10%. Capacitors are used in the manufacture of fireproof electrolytes. They contain a special substance that occurs quickly extinguish any flames.

Besides electrolytes designed not only with the technical requirements of condensers, but also taking into account the impact on human health and the environment. They do not contain solvents detrimental to human health and do not require disposal. Because of its quality aluminum electrolytic capacitors are widely used in frequency converters, power supplies and other devices.

PHILIPS FIGHTING TOO NOISY

PHILIPS FIGHTING TOO NOISY ...

With increasing computing power of digital equipment (PCs, laptops, rack modules, telecommunications systems, or devices slozhnobytovyh) more acutely raises questions related to the diversion of excess heat. And if the heat itself is relatively easy to take, you can do it effectively and seamlessly as possible for the user is much more difficult. So we have to work with you under-aloud audible rustling of the air flow from the rotating blades coolers inhabit our system units or blocks of flats server racks. In the latter case, the number of simultaneously rotating the CPU cooler can be tens or hundreds of units.

So it is no surprise that the producers of such equipment is constantly preoccupied with the development of more efficient systems that control heat dissipation.

Philips has announced a controller P82CF201, who with the help of built-in monitoring system of flexible working temperatures can control the speed of the two coolers, depending on the heating blown node (block). Basic chip is a new development that uses a conventional two-wire Philips cooler and not three wire (with a tachometer). Such an approach to the manufacturer, can save up to 30% of the cooler.

The controller detects the connected cooler, measuring the resistance of the stator winding it up. If one of the cooler fails (burns winding, for example), the second, automatically increases the speed. The fan speed is changed by a pulse width modulation voltage which allows the speed of the blades increase linearly, thereby reducing the maximum air flow noise (in any case, the noise does not reach the threshold of audibility discrete abruptly, but gradually and only when the temperature reaches a predetermined mark.)

NEW ENERGY-SAVING TECHNOLOGY INCREASE BATTERY LIFE 4 TIMES

NEW ENERGY-SAVING TECHNOLOGY increase battery life 4 TIMES

National Semiconductor Corporation and ARM introduced a new technology to 4 times longer battery life, used in wireless devices. Technology reduces power consumption devices ARM-based technology (it is 70% of all mobile phones) by adjusting the voltage and frequency characteristics manipulation processors.

The new technology will bring together hardware from National Semiconductor PowerWise and software Intelligent Energy Manager of ARM. The main area of application of energy-saving technology is mobile telephony, as new applications such as streaming, multimedia and games require additional power consumption. Currently, the battery simply can not cope with the requests used applications - said Bruce Beklof, head of the European division of ARM Marketing . - Increase the capacity of the battery is too slow compared to the growth of energy consumption, therefore, requires an integrated approach that combines hardware and software solutions.

In the first stage of introduction of energy-saving technologies is reached longer life power sources 75% will further improve this quadrupled. Currently, ARM and National Semiconductor are working together to standardize the interface between processors, control and energy saving software terminal equipment.

The first devices using energy-saving technology, will appear in early 2004, according to officials of corporations.

http://www.compulenta.ru

BIOBATAREYKA CHARGED FROM THE OXIDATION OF GLUCOSE RIGHT IN THE BODY

BIOBATAREYKA charged from the oxidation of glucose RIGHT IN THE BODY

Adam Heller, together with colleagues from the University of Texas at Austin has developed a biobatareyku - a miniature device that is implanted under the skin or into the spinal canal and receives power from the direct oxidation of glucose in the body. The energy generated by this battery, enough to fuel sensors, such as the level of sugar in the blood.

The principle of operation of the device is simple enough. The battery consists of two electrodes fiber length of 2 cm and a thickness of about seven thousandths of a millimeter. One of the fibers coated with a polymer material on the surface of the molecule is glucose oxidase - the enzyme that catalyzes the oxidation of glucose. The polymeric coating provides contact between the enzyme molecules and the fibers and the run-off it electrons.

Other fiber contains another enzyme molecule attached, which donates electrons to oxygen atoms. Thus, the fibers formed between the electron density gradient that allows an electric current.

However, while the power of such a battery is very low - only about 1.9 microwatts, which is approximately equal to the power battery watches.

The idea of creating batteries that would benefit from electricity directly from body fluids, is not new - a device powered by the oxidation of glucose, were first created about 40 years ago. However, to ensure that such devices can be used in the practice of implantation must meet a number of requirements, in particular, have small dimensions and operate at elevated temperature, acidity and the presence of salts, typical internal environment. To achieve these properties has been just now: battery Heller operates at normal blood temperature - 37 degrees Celsius - and the level of acidity (pH) of the order of 7.2.

The idea of using the described battery cells to power an artificial heart until it is realistic due to the small capacity of the batteries as well as its fragility - as long as such a battery will lose, on average, up to 6% of power per day. However, as the fancy Heller even enough to use biobatareyki research purposes, e.g., for powering sensors animal body during the experiment period of up to several days.

Now scientists face a series of challenges, among which, in particular, improving the efficiency of the batteries they have created in a complex salt solution, which is the internal environment of the body.

http://www.compulenta.ru

SILICON GRAPHICS PROCESSORS 128 PRESENTED IN ONE UNIT

SILICON GRAPHICS PROCESSORS 128 PRESENTED IN ONE UNIT

Silicon Graphics (SGI) is November 11 Origin 3900 supercomputer, contains 128 processors in a single block. The system is equipped with 256 GB of shared memory and can be expanded up to 512 processors with a maximum capacity of 2 GB of memory each, which in general is 1 TB.

According to SGI operating officer Warren Pratt (Warren Pratt), MIPS-processors used in Origin 3900, consume little power (15-20 W vs. 135 watts for Itanium and 85-150 watts for most modern processors), so there was the possibility of more dense placing them in the box. Besides, the waiting time is reduced, a substantial portion of which has a delay due to signal transmission wires.

That is, the opportunity to build not only the smallest but also the fastest computer.

In addition to the hardware design, the company unveiled Wednesday IRGO High Performance Computing (HPC) Workflow Optimization. She is running a 64-bit version of OS Unix SGI IRIX and optimizes the use of system resources and application performance.

Possible initial market the new system can be a resource-intensive scientific computing, called number-crunching. Origin Model 3900 is compatible with the older members of the family of Origin 3000 and uses the architecture of the total shared memory NUMAflex, which is a proprietary company and allows to link together thousands of processors.

SGI is gradually moving towards the support of Linux-based systems. CXFS, distributive version of the high-performance file system sharing SGI XFS, allowing to expand to a volume of several petabytes (1024 terabytes) will be included in the output of approaching the core Linux 2.6. The new system will be unveiled at the conference ACM / IEEE HPC and Networking Conference, to be held from November 19 to 21 in the United States.

Source: based on site Vnunet.com

FABRIC PROTECTS AGAINST RADIATION

FABRIC, radiation protective

On this achievement, said the magazine New Scientist. The publication says that the material is called Demron is not toxic and does not contain lead. To create a protective fabric Demron is placed between two layers of a conventional material.

The new fabric can be used in a variety of fields - from the creation of light protective overalls, the freedom of movement when working in areas with high levels of radiation to the protective tents and materials for aircraft and spacecraft.

Universal protection?

Unlike traditional protective clothing, saving only of alpha radiation, developed by the Florida Radiation Shield Technologies Demron also blocks beta-and gamma-rays. All three types of radiation produced by the decay of radioactive material.

The new fabric was originally conceived as a protective material for health professionals working with X-ray machines, but its creators believe that Demron useful in the nuclear industry.

According to Jenin clubbers of international concern British Nuclear Fuels, really appreciate the advantages of the new tissue can be achieved only when it becomes clear what level of protection it provides and how to change under the influence of radiation.

http://news.bbc.co.uk

UNIVERSAL CHARGER LIKE MOUSE PAD

UNIVERSAL CHARGER LIKE Mouse Pad

Reported that Splashpower solution consists of two components. The first of these - Splash Module - receiver is thin (thickness - less than 1 mm), which can be given any size and shape. Thus, the chosen design module can provide a fast and safe charging PDA, cell phone, music players and other devices.

The second component - platform, about 5 mm thick called Splash Pad. It, according to the developers, it will be possible to connect to any source of electricity, and even integrated into any surface without any fears. By the way, adds that the platform meets all international safety standards.

Thus, any device equipped with a module Splash Module, out on to the Splash Pad will be recharged without any wires and sockets. Moreover, the number of devices are supplied with energy, will be limited only by the size of the.

On the timing of the appearance of the solutions on the market and its price has not been revealed. It is known only that the company Splashpower negotiating with some companies to introduce their technologies to produce the next generation.

On this Site HPC and PocketPC City.

DIVERS WILL HEAT ELECTRICITY

DIVERS will heat ELECTRICITY

As reported by #39;MK#39; at the Institute of Mechanical Engineering, today conquerors depths, usually warm with hot water, runs on a system of capillaries that permeate diving suits. This method requires special equipment for heating and water injection. In addition, the diver can not independently adjust the heat input into the suit.

Suffer from the same defect, and all currently known methods for electrical heating. In addition, electric heaters costumes while not reliable. A heating element in them, as a rule, is a metal wire, which can easily break that immediately brings down the entire heating system. Another disadvantage is that the safety diver, dressed in a suit, a complete waterproofing.

The Institute of Mechanical Engineering, have learned to warm suit with electrically heated tissue. The tension in her very small, so even if water gets into the suit, elektrokostyum not hit its current owner. Power supply such a suit is on battery, which can be hung on the suit instead of lead sinkers.

Finally, the diver can not just when you want to enable or disable the heating system, but also to regulate the temperature in the suit.

Moskovsiky Komsomolets

INDUSTRY IS LOOKING FOR PORTABLE ENERGY SOURCES

INDUSTRY IS LOOKING FOR PORTABLE ENERGY SOURCES

This week, the Canadian government agency Alberta Research Council (ARC) has announced a working prototype of a fuel cell that uses hydrogen, natural gas, butane or propane. And last month, a team of researchers at Cornell University unveiled a device that converts the energy of radioactive isotopes directly into mechanical motion that allows the generation of electricity by means of micromachines. According to project leader professor of electrical engineering and computer science university Amit Lal (Amit Lal), such a battery, which occupies little space, can work for decades. The interest in commercial applications of nuclear batteries exhibit, medical device manufacturers, and mobile phones.

Consumers will be able to see it in commercial products in three to four years.

These developments - the research, all of which are intensive in the academic and corporate laboratories. Consumer electronics industry constantly looks for the replacement of nickel-cadmium batteries, which today feed the majority of electronic devices. Work is under way and on a more efficient solar cells and fuel cells on methane-based. Scientists from the Department of new materials ARC demonstrated the working model from which to operate small motor.

ARC fuel cell is a ceramic tube having a diameter of 2 mm and a length of 20 mm. #39;The process of development is still at a very early stage, but we hope to create an energy source that is easy to manufacture and at small sizes provide a very high energy#39; - said a senior researcher at the ARC Parto Sarkar (Partho Sarkar).

However, the development of the industry of new fuel cells and batteries may prevent security problems. Cornell scientists have to convince people that they will not be subjected to radioactive radiation. Lal said that selects only those isotopes that emit beta particles: their energy is too small to penetrate the skin.

Besides beta-rays, radioactive materials may emit hazardous alpha-and gamma-rays. #39;We are engaged in micro sources - says Lal. - Their radioactivity is so low that just do not worry about anything.

In October, U.S. Department of Transportation has removed one of the obstacles in the way of commercial applications of fuel cells based on methanol, allowing their use on airplanes. The problem was that methanol is readily combustible liquids.

http://zdnet.ru

MINIATURE NUCLEAR BATTERIES ARE ENOUGH FOR THE YEARS

Miniature nuclear batteries that ENOUGH FOR THE YEARS

American researchers from Cornell University managed to create a new type of electric current sources based on radioactive isotopes. Scope of these batteries can be very wide - from medicine and chemical analysis to space research and defense purposes.


A new source of electricity consists of a copper plate rigidly fixed at one end, and a thin strip of foil of radioactive nickel-63. The foil is placed under the copper plate at a short distance. The entire system is under vacuum. In the decay of a radioactive isotope allocated beta particles (electrons), they are deposited on a copper plate, which acquires a negative charge. Nickel foil, losing electrons, in contrast, is positively charged.

Since copper and nickel having opposite charges, the plate and the foil strip are attracted to each other and finally contact. At this point, the circuit current flows, the charges on the copper foil of platinum and nickel-63 are aligned, and between copper and nickel reappears interval. Then the cycle repeats again.

In fact, the new power source is not simply nuclear battery (such devices are known for several decades) and full microelectromechanical system (MEMS), capable of transforming the energy of radioactive decay is not only light, but also mechanical performance. This feature allows the use of a new development in the development of miniature mechanical devices of different purposes. Duration of operation of such devices can reach tens of years.

The half-life of nickel-63 over one hundred years, and the life of the new battery, according to the calculations of its creators, about half as much.

http://www.compulenta.ru

MEXICO STOVE WILL DROWN

MEXICO STOVE WILL drown ... Coffee beans

Mexican authorities have found an original way out of the economic crisis.

As it became known NTV television in the near future in this country will be destroyed 300 tons of low-grade coffee.

At the extreme measures of the Mexican authorities pushed the situation in the global coffee market. Now there is a glut in the market, since the consumption of the drink in the world has declined steadily.

To save one of the major industries in the country, the Mexican government decided to use lower grades of coffee for the production of filters, or even as a fuel in cement factories.

http://www.ntvtv.ru