Development of space solar power
Development of space solar power
Japanese animated series “Mobile Suit Gundam”, the depletion of fossil fuels force the shift of human space-based solar energy development, a new focus of global conflict. In the science fiction world, the background of this era set in 2307. However, the real world, Japanese scientists have now set out to develop rail-related hardware, power generation facilities, as a new, renewable clean energy, is expected to be completed within 20 years.
From space using solar panels, “download” the concept of energy has long existed, it seems impractical because high cost. In Japan, the global energy crisis and environmental concerns for the viability of the plan does not seem to be taken seriously again, last year, Institute of Laser Technology in Osaka produced up to 180 watts of solar power laser energy. In February this year, scientists tested the ground in Hokkaido Electric Power Transmission System, will form a microwave energy transmitted to Earth.
Study of laser and microwave together constitute an audacious plan, Japan’s space agency Japan Aerospace Exploration Agency subordinate (JAXA), presided over the space solar power system (SSPS). By 2030, the agency plans to launch a solar generator to the geostationary orbit, the generator will transfer one billion watts of solar energy the Earth, as a large nuclear power plant’s generating capacity. Solar energy will be delivered in the form of microwave or laser, can be converted into commercial power grid, or stored hydrogen.
Japan’s major research institutions have about 180 scientists involved in this project. JAXA Research Center of the High Representative Hiroaki Suzuki said: “We conducted this study is based on the common-sense reasons – will soon run out of fossil fuels, increasing global warming, these problems be solved.” JAXA said the space solar power has obvious advantages : in space, solar radiation is on the ground 5 to 10 times more efficient collection; 24-hour collection, and is not climate; clean, do not produce pollution and waste, safety and reliability. The energy intensity to reach the ground may reach 5 kW per square meter – about mid-latitudes in summer sunny noon to 5 times. Although scientists say that number will not hurt the human body, but to receive the energy area will be isolated and placed in the sea.
JAXA researchers are testing in progress, hard fiber laser was 800 watts at about 500 meters from the station launched, through 1064 nm wavelength filter only the reflection of light directly at the experimental solar panels. (The reason to use this frequency because it can easily just through the Earth’s atmosphere, loss of less than 10%.) Key task now is to find which can effectively convert sunlight to laser materials, the preferred material as containing neodymium and chromium YAG ceramic materials.
Basic research is only part of the project, testing of microwave and laser systems require a large space equipment: film capacitor filters, solar panels and the effective distance of thousands of kilometers of microwave transmission equipment, which total about one million tons. Terrestrial microwave receiving antenna will also have the 2 km long.
The total project cost may be as much as several billion dollars, but Suzuki and his colleagues say they will not total costs: “Our basic Yanjiu completed, we do not know whether it is feasible. Our goal is to produce energy and hydrogen to stabilize the economy estimated price of 6.5 cents per kilowatt-hour. “This is related to the current cost of conventional electricity rather, in the future will have higher economic value.
In accordance with the present level of technology, large-scale equipment to the space can only be transmitted through the national space agency coordination to complete. Suzuki said that although the potential militarization of space, the trend for countries more inclined to independent research and development of space technology, but “if the JAXA, NASA and the European Space Agency can work together, it would be the best.” Although this all sounds more Prelude like science fiction.
Posted by Susan under business news | Permalink | Comments OffCheap charger is damage, cell phone power management need to be cautious B
Cheap charger is damage, cell phone power management need to be cautious B
ON Semiconductor vice president of sales Lin Jianming China: the near future, sales of mobile phones and adapters will be completely separate, which will pose a mobile phone side of the test charge.
Lin Jianming: If there is no perfect internal overcharge protection circuit, the battery will overcharge may cause an explosion of serious consequences.
Charging the phone interface, over-voltage is undoubtedly the most dangerous. Poor quality in the adapter, failure or user error then a different device adapter can happen. In general, your phone charge management IC can control the charge current and voltage, to maintain the security charge the battery. However, if the rated current of the input voltage is too high while charging, over charging management circuit can withstand value, the circuit components will be adjusted because of charge-off or burned out of control power and role. The worst case, at this time if the user also uses low-cost lithium batteries, could not complete overcharge protection circuit, the battery will overcharge may cause serious consequences of such an explosion. To this end the provisions of the phone in YD/T1591-2006 in the side to contain over-voltage protection circuit to prevent such from happening. Overvoltage protection (OVP) circuitry detects over-voltage fault conditions, the detection circuit will be switch off, disconnect the phone and the adapter output.
Power Management Products National Semiconductor Senior Application Engineer Zhongjian Peng: charge management circuit functions normally charge by the management of single chip (Charger IC), or integrated charge-management functions of power management chip (PMU) to achieve. Rechargeable lithium battery management circuitry to support features for the trickle charge, constant current charging, constant voltage charging of the three charging process, and should have protection mechanisms to prevent overheating. Advanced charge management circuit also should have the input voltage over-voltage protection function. The protection of the safety of the product itself is very important. Some unqualified charge management circuit, often lack the protection of the design, the circuit itself may cause damage to the system overheating, or even more serious security issues.
MPS Marketing Director Yuan Wenlin Asia: a new generation of rechargeable IC PMU have in addition to charging function through the highly integrated hardware to achieve high reliability, but also should have OVP (overvoltage protection), OCP (overcurrent protection) , NTC function, both a high input voltage, small size and simple external circuit. USB charger for battery management IC should be consistent with low standby power / charge current programmable switching / charging mode multiple input / can set the input power charger or USB port, and automatically charge the battery and cell phone distribution work be current; and in accordance with standard USB port of the limit.
Excellent cost-effective chip Recommended
Power Integrations’s primary regulator device, such as LinkSwitch, can maintain the electrical insulation, and does not require optical isolators in the case of feedback to provide precise output voltage. This can reduce costs, help design a smaller charger, while maintaining the necessary security clearance.
The latest LinkSwitch-II products with accurate voltage control, can be very accurately simulated USB port. In addition, the products include cable drop compensation, so regardless of cable above the extent of the loss of current, voltage can be kept constant.
LinkSwitch-II 5% voltage accuracy, current accuracy of 10%, for the adapter and charger is ideal. Also, it requires 20 components to build a complete AC power, which saves the cost of components itself, but also saves production time, assembly and inventory costs. “In China, labor costs have increased to around 0.003 U.S. dollars each component cost, for small patchy resistance and capacitor 来说, in the cost of Shangzhangfuduo Gengda.” Doug Bailey of Road.
MPS full range of battery charging chips are produced using high pressure technology, have a minimum 20V, maximum 28V of voltage, and have been integrated over-voltage protection and meet the low standby power requirements. To comply with USB OTG low standby power requirements, a new generation of MP-2605X series also will reduce the standby current to 40uA, and increase the reverse input voltage protection (-16V) function, following the industry MPS charge chips widely used:
MP2605 standard charge applies to all chip general hand-held portable devices; MP26056 support USB / adapter pair of input interface for USB interfaces need to charge the portable device; MP2607 built pwr path, can be automatically assigned to charge the battery and the phone work current required for high-end hand-held portable devices such as smart phones, GPS navigation, PDA applications.
“Based on customer feedback, they are using MPS of charge chips, the great majority Yin Wei cost considerations Ercai Yong PMU / single chip charge management, but only to find defects line charge account all Ke Fan Xiu back the number of more than 20%, but cause the overall cost increase; but wants to be using external components to enhance the safety factor PMU, the additional cost and board area, also makes the industry difficult to sustain. At this point if the use of MPS battery charging chip, cost and product quality can be strikes a balance. “Yuanwen Lin said.
TI’s bq24070 series and bq24032A series provides a separate charge path and system power path, effectively prevent the repeated charge and discharge system problems, battery life is greatly extended; resolve the cell phone a full charge the battery consumption issues began to extend the standby time 10 ~ 20%; effectively prevent the system out of control due to CPU crash and the risk of charge, to prevent the result of external pressure and breakdown voltage over the issue, greatly increasing the reliability of the system; eliminates the additional over-voltage protection, and path switching MOSFET and Schottky diode, reducing total system cost. The adapter current consumption in the system and charge redistribution between the automatic on-demand, using a small adapter, but greatly accelerated the charge time and reduce costs while improving the user experience.
“TI advocates the path of dynamic power management in battery power management applications has been recognized by customers, such as dual-port (USB, AC adapter input, respectively) linear charge management chip bq24032A series, single-port bq24070 Series (USB, AC adapter to share an input), “Zhang was said.
ON Semiconductor has introduced a series of overvoltage protection chip. AC adapter for wall charging plug the NCP347/348, can provide up to 2A of charge mobile phone current and voltage transients up to 28V fault protection; NCP360 and NCP361 USB interface, suitable for positive over-voltage protection controller, with very low 35μA current consumption to meet USB standby requirements, NCP361 also has a current limit function; to meet the cell phone charger / power supply to accessories such as the demand for bi-directional current control, ON Semiconductor also forthcoming NCP370, provide ± 28V overvoltage protection and adjustable current limit.
SGM4054 as St Microelectronics state management in charge introduced the first product has now passed the test in a variety of applications and high-volume applications, the main features include: programmable charge current up to 800mA, high-capacity battery can achieve the fast charge; heat calibration can prevent constant current, constant voltage operation mode, the battery overheating and improve the safety of consumer products; by USB directly to a single battery charge, to meet the multi-product compatibility; with charging indicator, providing the user identification information; 1% charge precision, to ensure battery life; low shutdown current of 25μA, promote the effective utilization of power; own 2.93V trickle charge threshold, rechargeable lithium battery can be fully consistent with the standards process (trickle charge, constant current charging, constant voltage charged off recognition); with automatic recharge feature, to provide sufficient energy. Follow-up will launch high-pressure, high charging current of charge management chip, to meet the new demand for mobile phone application for more power.
National Semiconductor for different applications-rich charge management solution. A single chip charge management chip (LM3658), support for USB, AC-DC regulator of two inputs, and have overheating protection. There are many highly integrated power management chip (PMU) has well-integrated charge-management functions. Such as GPS, PMP designs PMU LP3913, the integrated support for USB, AC-DC regulator of two input and support of the charge current path management snap. There are many applications designed for mobile phones PMU as LP3919, more up to 28V overvoltage protection.
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Posted by Susan under business news | Permalink | Comments OffCheap charger is damage, cell phone power management need to be cautious A
Cheap charger is damage, cell phone power management need to be cautious A
The market has been sold for several dollars cheaper charger, and some cottage charger configured only cost a few dollars. These low-quality cell phone charger to ensure it? Safe? How do they save the cost of it? Saying "you pay for," Although today is not entirely correct, however, mobile phone charger market, it is still the truth. Here, you will be lifted some of the secrets of cheap chargers, and chargers to prevent the harm of these low-cost, mobile terminal power | regulator management program must be a preventive measure, can not cut corners to save costs, or else.
Causes of poor quality and hazardous charging device
MPS Asia Marketing Director Yuan Wenlin: complete charge management and protection should be divided into three parts: the charger end, the host side, the battery pack. The protection of their respective a chain, are indispensable.
Yuan Wenlin: Many markets sell the cheap charger may only use a simple winding transformers, there is no such over-voltage over-current protection.
Chargers are generally divided into Switch (switch type) and Linear (linear), with many markets selling cheap charger for profits, may only use a simple winding transformers, there is no over-current protection of overvoltage etc. also not taken into account such factors as power supply stability, the potential risk to bring the phone itself. Because mobile phone manufacturers can not predict whether its end customers to use only qualified charger charging the host, so many international brands in order to protect its reputation and reduce the cost of repairing the sale will charge the phone line plus a front-end chip protection .
State Ministry of Information Industry in 2007 by the introduction of handheld mobile communications standard charger, mobile phone manufacturers have specifically requested additional input over-voltage protection function of the host side, but the market many companies to cut costs in shipping in volume after shipment application on the network canceled the certificate was used by the overvoltage protection chip. At the same time, the battery pack side, cancel the NTC should Dianchi package over-temperature cold Baohudianzu the battery core temperature changes Wufajishi charge feedback Ji Guan Li chip, Zhe gave end users were in charge when the charge Xian Lu Dai Lai light damage , shortened battery life; serious cases such as the battery explosion / fire and other potential hazards.
Texas Instruments | Instruments high-performance analog business development manager Zhang is: from the charger side, the biggest problem is the use of optocoupler, transformer insulation is not absolutely reliable, and if to save money, poor quality of materials used, there greater safety hazards; second no-load power consumption too, and now the mainstream requirement is less than 300mW, the Japanese have begun to demand 150mW; third point is that consistency is poor, after the exchange of different adapters can not guarantee applies.
Zhang was: Some mobile phone charger management software by relying, in the event the software errors that may result in accidents and disasters.
From the host side view of a number of mobile phone charging management function from the power management chip alone PMU completed, or anyone else for the single-chip integrated baseband, which charge related work all rely on PMU or the baseband chip to implement the software. While the cost is low, but the software dependent on, if there software errors may cause unexpected disasters; on the other hand, CPU Built-in rechargeable management functions, as process constraints often can not be achieved with higher input voltage, so when the user use of poor quality, or charger, plug the charger because the surge voltage generated all possible PMU or damage to the baseband chip, this time through the software to achieve many of the protection functions are not working, may have unpredictable consequences; s Third, a number of built-charge management can only be achieved and the average pulse current charging current management, the peak current limit is to rely on the charger itself, which may cause the battery life is too short, use of public phones in the future exchange of appropriate different adapter also will be hidden after.
Saint-state microelectronics product line manager, Lu Liang: charger as the product of accessories, competition, cost too much pressure, there will be more hidden than the host side. There are usually indicators of performance and product description does not match, or the electric strength failed. Dielectric strength is the charger product safety assessment of important indicators. If consumers choose such a product, electric shock may occur, threatening the personal safety of consumers.
Security measures
PI, senior vice president Doug Bailey: There are three safety hazards battery charger, or electric shock, fire and damage to the environment.
Doug Bailey: the existence battery charger electric shock, fire and safety hazards and environmental damage.
Security design approach is to supply the high side and low side to maintain the appropriate insulation and between the gap. International Electrotechnical Commission (IEC) of the rules covering the safety of power supply design, there are many security agencies in monitoring production standards.
High quality products include thermal shutdown function, disconnect the power when the charger overheating; also has over-current shutdown feature, you can short-circuit the battery (which may lead to heat and fire) will power down to about 1% of rated power. Through the use of efficient control algorithms, and to ensure that products are free of halogen and PVC to minimize harm to the environment. These algorithms ensure that the charger in the power consumption of non-minimum state of charge.
Texas Instruments high-performance analog business development manager Zhang is: a new generation of mobile charge management chip requires the following characteristics:
Higher pressure, typically 18V ~ 26V; path management function, independent of charge and system power path path; thermal management capabilities, once the chip core temperature rises to a certain point automatically reduces charge current to ensure the safety of the system; LDO function, when the battery is not installed can boot the system, which is especially suitable for debugging or production test, certain occasions such as wireless public telephone, the battery may not be standard when it comes to cost.
USB charging power needed to meet the USB IF standard, low-power power supply 100mA, high-power power supply 500mA; Furthermore, a switch-mode charge will maximize the use of USB port 2.5W maximum power consumption.
Posted by Susan under business news | Permalink | Comments OffEngineer e-reader information
Engineer e-reader information
The device can display content stored on SD cards on a conventional television. Developer Braddock Glaskill wants to give students access to knowledge. 50 prototypes of the "Human Reader", he has produced.
In the production costs of up to 35 Humane Reader (image: Braddock Gaskill).
Software engineer Braddock Glaskill in Pasadena Radio Club has introduced an e-reader, which costs in production are $ 20 and works with 8-bit technology. 50 prototypes of its Human Reader, he has already built.
The content is stored on a simple SD card. A copy with 2 GB of memory can store the contents of about 5,000 books, and also an offline version of Wikipedia in different languages has it place.
The Humane Reader has connections for a conventional TV and a keyboard. This can be searched for text or text excerpts. An Internet connection is not necessary.
From a production of 10,000 units of the Humane Reader will cost under $ 20 – less than a single book. Otherwise the price is around $ 35 per unit. The reader is designed for use in developing countries. Glaskill is currently looking for a partner institution that could distribute the prototypes.
Its technology is Glaskill non-governmental organizations (NGOs), teachers, nonprofit and other organizations are available. It is under the Creative Commons Attribute Share-Alike License (hardware) and the GNU Public License v3 (software).
One study (PDF) of the Organisation for International Development, according to OECD and UNESCO have only 20 percent of the inhabitants of developing a computer or Internet access. But often they have but one on TV. This fact will Gaskill use for his project.
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Posted by Susan under business news | Permalink | Comments OffToshiba brings notebook with a matte display and Blu-ray burner
Toshiba brings notebook with a matte display and Blu-ray burner
The Satellite Pro L670-171 is powered by a 2.4 GHz Core i5. For the graphic provides an ATI Mobility Radeon 5650 with 1 GB of private memory. The notebook is available now to be had for 1199.
Toshiba has expanded its late June introduced business notebook series Satellite Pro L670 (17 inches). The new top model L670-171 to 1199 is powered by an Intel Core i5 450M 2.4 GHz. Unlike the other methods used in the series core CPUs dominated the i3-i5 turbo boost, that is, individual cores can be overclocked up to 2.66 GHz. This benefits applications that are not optimized for multiple cores.
For the graphic provides an ATI Mobility Radeon HD 5650 with 1 GB of private memory. The DirectX 11 GPU is also suitable for games. On board also 4GB of DDR3 RAM (possible extension to up to 8 GB), a 640-gigabyte hard drive (5400 revolutions per minute), WLAN 802.11b/g/n (), Gigabit Ethernet and Bluetooth 2.1 with EDR .
Peripherals can be connected to two USB 2.0 ports, a combined USB / eSATA port and connect each one VGA and HDMI output. The built-in Blu-ray drive, the silver discs not only read but also describe. The matte 17.3-inch screen with LED-backlit 1600 x 900 triggers pixels. Windows 7 Professional (64 bit) is preinstalled as the operating system
The L670-171 weighs 2.8 pounds and measures 41.4 by 27 by 3.8 inches. Toshiba’s battery life is up to three hours and ten minutes. The manufacturer grants a one year warranty.
The Satellite Pro L670 costs in the top version with a Blu-ray burner in 1199 (Picture: Toshiba).
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Posted by Susan under business news | Permalink | Comments OffHP will not build a Windows-Phones
HP will not build a Windows-Phones
In the communication area of the world’s largest manufacturer has exclusive use of WebOS. In the tablet segment, it looks different. HP is currently Microsoft’s largest customer.
Hewlett-Packard has confirmed that there are no phones with Microsoft’s upcoming operating system Windows Phone will build 7th Manager Todd Bradley told CNBC, will run exclusively on cell phones in the future with the acquired Palm OS WebOS. Phone devices with Windows 7, he graduated from in addition explicitly.
The decision comes as no surprise – after all, HP has spent $ 1,200,000,000 in order to absorb WebOS. However, HP is Microsoft’s best customer, and in Redmond would be the clear rejection certainly feel as a setback. At least HP Tablet PC uses both WebOS (retail) and at the desktop OS Windows 7 (Slate 500 for business customers).
Microsoft is rumored to have undertaken a number of other big names as smart phone partner for the launch of Windows 7 Phone: Dell, Asus, LG, HTC and Samsung. They all use but also parallel to Android smartphones.
HP has previously also been experimenting with Google’s Android OS as Linux Tablet OS, but now set all projects.
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Posted by Susan under business news | Permalink | Comments OffDroid Incredible is soon to get update on Android 2.2
Droid Incredible is soon to get update on Android 2.2
It could be the end of July or early August to be available. At the same time will unlock the manufacturer 720p recording and 11n WLAN. The expected high – and unsatisfied because of lack of OLEDs – further fueling demand.
HTC Droid Incredible
HTC updates its Android devices continue expeditiously. In the United States is already out in the coming weeks, an update of the Incredible Droid on Android 2.2. The Boy Genius Report has learned from a source.
The U.S., Verizon Wireless gets the available smartphone operating system, which is also known under the code name Froyo, according to the report in late July or early August. In addition, updates to activate video recording in 720p (HD ready) and Wi-Fi IEEE 802.11n.
The Incredible Droid would catch up with these improvements almost as yet unpublished models such as Motorola Droid Droid X and perhaps even two – especially as the Droid X will initially come with Android 2.1. However, excess demand for the HTC model in the U.S. now anyway, the delivery capacity of HTC. Reason for a lack of the necessary organic light emitting display (OLED) is.
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Posted by Susan under business news | Permalink | Comments OffNvidia is DirectX 11 midrange Geforce GTX 460
Nvidia is DirectX 11 midrange Geforce GTX 460
The cards are available with 768 MByte and 1 GByte memory. They cost 199 or 219 €. The smaller configuration is available now.
Nvidia has introduced the GeForce GTX 460 a new DirectX 11 chip on the basis of the Fermi architecture. It is the entry to the DirectX 11-portfolio of the manufacturer, with 336 stream processors (CUDA cores) and 56 texture units, but all located in the middle power segment.
Cards are available in two versions: with 1 GB GDDR5 memory and 256-bit memory interface from 219 € and with 768 MB of GDDR5 memory and 192-bit interface from 199 €. The memory bandwidth is depending on the model, respectively 115.2 86.4 GB / s.
The GPU will be manufactured in the 40-nanometer process and has 1.95 billion transistors. Nvidia gives the maximum power of 160 watts.
The 768-MB version is available now, with 1 GB of RAM cards from the end of July. The hardware partners include ASL, Asus, Colorful, ECS, EVGA, Gainward, Galaxy, Gigabyte, Innovision 3D, Jetway, KFA2, Leadtek, MSI, Palit, Point of View, PNY, Sparkle and Zotac.
New DirectX 11 midrange Nvidia: Geforce GTX 460 (picture: Nvidia).
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Posted by Susan under business news | Permalink | Comments OffGoogle is planning a successor for Nexus One
Google is planning a successor for Nexus One
CEO Eric Schmidt that the aim was reached to revive the phone with the hardware business around Android. Therefore he sees no reason to bring out another smartphone. The real reason could also be bad sales.
Google’s Android mobile Nexus One will get no successor (Image: Google).
Google will initially do not produce their own smartphones more. There will be no successor to the Nexus One, Google CEO Eric Schmidt said in an interview with the British newspaper "Telegraph".
They had brought the Nexus One on the market to drive the business with mobile hardware around Android, says Schmidt. That program had risen so much that now there was no reason to bring another, own smartphone on the market.
What Schmidt does not mention is the fact that the Nexus One is never able to win in the highly competitive smartphone market significant portions. Already a few weeks ago it was said, therefore, we would attack with the device, no new markets.
Now Google has completely adopted by the manufacture of its own smartphones. At the same step was also recently forced Microsoft: Because of missing sales success of the software giant made its social-networking phone Kin only two months after launch in order to continue to concentrate fully on Windows Phone seventh
For the upcoming operating system OS Google Chrome Schmidt is considering a similar strategy as that for Android. There were already ready reference designs and hardware partnerships have already been closed – in that one could publish a separate device later this year. However, this is obviously only an emergency plan. Google wants to wait and see what would come from its partners, Schmidt said. Chrome OS should be on the market in late fall.
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Posted by Susan under business news | Permalink | Comments OffTranstec launches business notebooks with anti-reflective screen
Transtec launches business notebooks with anti-reflective screen
All models use Intel platforms. The series complements Levio 510 Transtec a Geforce 330M graphics. It comes as the 500 models with 15.6-inch screen. As Levio 300 there is also a 13.3-inch model with 1.7 kilos.
Transtec has introduced three business notebook series. They run under the name Levio. The Levio 300 comes with 13.3-inch screen, the rows 500 and 510 with 15.6-inch screen. All displays are anti-reflective coating.
For the subnotebook Levio 300 Transtec is the data sheet (PDF) to a weight of 1.7 pounds. The battery life is with the Intel Core 2 Duo processor SU 7300 about 3.5 hours. Prices start at € 867.51 including Wi-Fi, but without UMTS module or operating system, which are among the options at Transtec. All notebook can be configured.
The preferential 15.6-inch version Levio 500 offers from Transtec to 724.71 €. In contrast to Levio 510 from 1022.21 € here an integrated Intel graphics is used, while the more expensive models obstruct Nvidia Geforce 330M graphics chip. In both series Core i5 and i7 processors are selected.
The configuration and the price can be modified with Transtecs configurator. As a standard warranty is two years with pick-up service, but offered no fixed return date. The battery is only covered for six months.
15.6-inch notebook Levio 510 Geforce 330M graphics (Image: Transtec)
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