Static var generator boosts energy efficiency and ensures load balancing

For industrial grids and large commercial buildings, TDK has developed the Epcos PQvar, modular static var generator for active, stepless power factor correction and load balancing.

It has a fast response time of less than 15 milliseconds and a dynamic reaction time of 50 micro seconds and offers significantly faster compensation than conventional systems, claims TDK. The Epcos PQvar is suitable for the active compensation of both inductive and capacitive loads and can achieve a power factor of 0.99. At the low-voltage level PQvar is designed for 400 and 690V supply systems. In these voltage classes, individual modules with outputs of between 30 and 200kvar are available, as well as systems for up to 880kvar per compensation cabinet.

The targeted use of power factor correction systems can significantly improve energy efficiency as the power losses in the electrical transmission and distribution network are significantly reduced and, the CO2 emissions for generating wasted power are avoided. Transformers and the power transmission and distribution networks can be used more efficiently, says TDK.

Using advanced multi controllers (AMC), the PQvar system can be combined with conventional passive low-voltage compensation stages. The medium-voltage level is covered by systems for 6.0, 10 and 35kV. The modules are designed for outputs of between 2000 and 12,000kvar. All modules are available for three-phase grids with or without neutral conductors. Depending on the output and size, the modules are designed as slide-in units for control cabinets and systems for wall mounting (low-voltage) or as control cabinet systems (medium-voltage).

TDK is an electronics company based in Tokyo, Japan. It was established in 1935 to commercialise ferrite, a key material in electronic and magnetic products. TDK’s portfolio includes passive components, such as ceramic, aluminum electrolytic and film capacitors, ferrites and inductors, high-frequency products, and piezo and protection components, as well as sensors and sensor systems and power supplies. These products are marketed under the product brands TDK, Epcos, InvenSense, Micronas, Tronics and TDK-Lambda. Further main product groups include magnetic application products, energy devices, and flash memory application devices. TDK focuses on information and communication technology and automotive, industrial and consumer electronics.

http://www.global.tdk.com

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Connecting cities with citizens – touch is everything

By 2020, current statistics show that the number of connected devices worldwide will grow to 30 billion1. With the urban population growing year on year, metropolitan governments around the world are getting ‘smarter’ in an attempt to improve the lives of citizens and visitors as they move through the cities, increasing engagement via personal, portable electronic devices and “smart” street-level systems.

Managing life better – the future of cities

There are many ways that city planners are turning to smart, connected technologies to enhance, engage and connect with citizens:

  • • diverting passengers from a full train or bus to one that has seats
  • • alerting drivers to available car parking spaces and electric vehicle charging points
  • • informing waste management companies when bins or recycling points are nearing capacity
  • • detecting rising water levels in sewers and rivers and warning of potential flooding
  • • turning on, or increasing the brightness of streetlights during inclement weather
  • • detecting road traffic accidents and alerting emergency services
  • • redirecting traffic to avoid hazards and traffic jams
  • • informing visitors of the location of useful services such as hospitals, police stations or ATMs.

The opportunities are endless.

The increase in urban populations means that managing the requirements of citizens and tourists is crucial. People expect to be connected all the time and have instant access to information when travelling in and around cities, and expanding the digital experience can enhance the quality of city life. Touch screens have become the preeminent method in which people connect with technology. With more mobile phones in the world than people, we all take for granted the experience of connecting to the digital world through the screens on our portable devices. Central to the creation of smart cities that connect with its citizens, is taking that experience and upscaling it. Large format, reliable touch screens that operate all year round, in any location and weather condition, are providing this link.

Busy retail areas in Europe have seen an increase in super-sized “tablets” with large, touch sensors installed in the streets, offering interactive digital information to passers-by. The units are packed with familiar features including swipe, flick and pinch gestures, allowing intuitive navigation to access content. Built-in cameras can be used by the public for fun, but can also allow authorities to monitor the surroundings for problems. The large touch screens must function reliably in all weathers and be made from thick safety glass, ensuring vandal resistance.

 

Image 1 – Surtronic Adapting cities – connecting digital and physical

Many cities are looking to the future and installing smart, digital street “furniture” such as way-finders and bus shelters, to improve city management and citizen engagement. Citybeacon™ terminals have been installed throughout the innovative Dutch city of Eindhoven, to help residents, visitors, businesses and local government engage with each other. Citybeacon bridges the gap between the digital and physical worlds at street-level using a cloud based management platform, to provide reliable connectivity and maximum flexibility via a reliable, all-weather touch screen.

This combination enables visitors and residents to access relevant information about the city and local businesses, and their surroundings. OCP Solutions B.V., who developed Citybeacon, decided upon rugged 32” Zytronic touch screens to provide a stable, low maintenance solution, capable of operating in a wide range of environmental conditions in a challenging, unattended public environment.

The Citybeacon incorporates NFC, RFID, and Bluetooth based payment technologies that link with mobile devices, allowing users to take advantage of local services such as parking. Two, large double sided displays at the top of the units share information such as public service announcements and local business promotions. Air quality sensors, UV detectors and cameras collect real time data, while energy saving smart lighting adjusts to current conditions.

 

Image 2 – Citybeacon

Any city, anywhere, any weather

Civic authorities in the Swedish city of Helsingborg decided to install an outdoor network of interactive digital totems to keep in touch with citizens, and help tourists find their way around. Importantly, the system also needed to work reliably in very cold Scandinavian winters with minimal post installation servicing.

Helsingborg chose Infinitus “imotion” G6 kiosks, equipped with a 47” Zytronic touch sensor. Rated to work reliably down to -40°C, well below the coldest recorded winter temperature in the city, the 2.000 nit super high bright touch screens are also designed to be readable in bright sunlight. The system is rugged and vandal resistant, and is protected with audio alarm and impact sensors. To increase audience engagement the G6 kiosks have an integrated Wi-Fi hot spot allowing passers-by to connect to the internet, and either transfer data, or download kiosk content, such as guides to their mobile phones and take with them as they walk around the city.

 

Image 3 – Infinitus

An example of a smart city initiative related to public transportation, saw Seoul’s municipal government installing digital bus shelters across the South Korean capital. Each shelter was fitted with a 46” Zytronic touch screen to provide commuters with engaging, easy-to-access, real-time information about traffic, transit routes and local amenities. Again, the selection of the touch screen technology was made based on the necessity for a reliable, durable interface capable of delivering an excellent user experience in both hot, humid Seoul summers and freezing winters.

 

Image 4 – Seoul bus shelter

The proprietary, patented, projected capacitive touch technologies developed by Zytronic have proven their ability to be employed in the most uncompromising of environments, on many occasions and all over the globe. Companies manufacturing smart city terminals and digital street furniture rely upon its superior, all-weather performance that has been demonstrated in many applications over the last twenty years.

Conclusion

Cities are being driven to engage with their citizens in new ways, providing the “connected” experience they increasingly demand. By installing innovative infrastructure at street level, city planners can improve communications, services and the environment for the urban population. Touch screens are now an integral part of our everyday life. For successful deployment in public spaces, they must be as sensitive and reliable on the city streets as they are in your hand. For smart city projects to work, the connection between digital and physical must be dependable, 24 hours per day, seven days per week and 365 days of the year. Touch screen technology from Zytronic is designed to work precisely in these locations and environments, making it an invaluable tool in the quest to make cities smarter.

https://www.statista.com/statistics/471264/iot-number-of-connected-devices-worldwide/      

Ian Crosby, Sales and Marketing Director, Zytronic

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Linear LED controllers do not require inductors for signage and smart-lighting

Diodes offers the AL5814, AL5817, AL5815 and AL5816 linear LED controllers, claimed to deliver dimmable and adjustable drive current for LED strings with more than 80 per cent efficiency. The AL58xx series provides a low bill of materials cost for a range of applications in the commercial and industrial areas including signage, instrumentation illumination, lighting of appliance interiors, architectural details and general smart-lighting installations.

Input range is 4.5 to 60V. The AL5814, AL5817, AL5815 and AL5816 linear LED controllers do not require inductors and maintain good EMI performance, making system integration simpler. Internal power dissipation is also minimised compared with other designs due to an external power transistor, says Diodes. The AL58xx series is capable of providing up to 15mA to an external MOSFET or bipolar transistor to drive LED strings. The LED drive current is configured by an external resistor with four per cent reference voltage accuracy and excellent temperature stability. In addition, the AL5815 and AL5816 devices support PWM diming, while the AL5814 and AL5817 devices support both analogue and pulse width modulation (PWM) dimming.

Protection features include over-temperature and input under-voltage lock-out. The AL5814 and AL5817 devices also provide ‘LED open’ protection via a Vfault pin, as well as LED thermal fold-back protection.

The linear controllers exhibits good EMI performance and the wide temperature range of -40 to +105 degree C enables the parts to also operate in harsh environments.

The AL58xx series is available in SOT-25 and thermally-enhanced MSOP-8EP packages. 

Diodes manufactures and supplies application specific standard products within the broad discrete, logic, analogue and mixed-signal semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets.

The company’s portfolio includes diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC/DC converters and controllers, DC/DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers. Diodes also has timing, connectivity, switching, and signal integrity solutions for high-speed signals.

Corporate headquarters and Americas’ sales office are located in Plano, Texas and Milpitas, California, USA. Design, marketing, and engineering centres are located in Plano, Milpitas, Taipei, Taoyuan City, and Zhubei City, Taiwan; Manchester, England; and Neuhaus, Germany.

Diodes’ wafer fabrication facility is located in Manchester, with an additional facility located in Shanghai, China. Diodes has assembly and test facilities located in Shanghai, Jinan, Chengdu, and Yangzhou, China, as well as in Hong Kong, Neuhaus and Taipei.

http://www.diodes.com

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Low power microcontroller duo extends battery-powered sensors and wearables

Two microcontrollers from Maxim Integrated, the MAX32660 and MAX32652 are based on the low-power Arm Cortex-M4F. They are suitable for wearable sensors and battery-powered applications such as IoT sensors, environmental sensors, smartwatches, medical/preventive health wearables, and other size-constrained devices.

The MAX32660 and MAX32652 microcontrollers provide designers with the means to develop advanced applications under restrictive power constraints, says the company. Maxim’s family of Darwin microcontrollers combine its wearable-grade power technology with the biggest embedded memories in their class and what the company claims is some of the most advanced embedded security in the world.

The MAX32660 is characterised by powerful processing in a tiny form factor. Memory, size, power consumption, and processing power are critical features for engineers designing complex algorithms for smarter IoT applications. Existing solutions either have sufficient power consumption but limited processing and memory capabilities, or if they have higher power consumption there are more powerful processors and more memory. The MAX32660 offers designers access to enough memory to run some advanced algorithms and manage sensors (256kbyte flash and 96kbyte SRAM). They also offer power performance down to 50-microW/MHz), and a small form factor of 1.6 x 1.6mm in a WLP. They are also available at a cost-effective price point, adds Maxim, enabling engineers to build more intelligent sensors and systems that are smaller and lower in cost, while also providing a longer battery life.

The MAX32652 is a low power microcontroller with scalable memory. As IoT devices become more intelligent, they require more memory and additional embedded processors which can each be expensive and power-hungry, explains Maxim. The MAX32652 offers an alternative for designers with the low power consumption of an embedded microcontroller with the capabilities of a higher powered applications processor. With 3Mbyte flash and 1Mbyte SRAM integrated on-chip and running up to 120MHz, the MAX32652 can be used in IoT devices that strive to do more processing and provide more intelligence. Integrated high-speed peripherals such as high-speed USB 2.0, secure digital (SD) card controller, a thin-film transistor (TFT) display controller, and a security engine position are integrated. With the added capability to run from external memories over HyperBus or XcellaBus, the MAX32652 can be designed to do even more tomorrow, providing designers a future-proof memory architecture and anticipating the increasing demands of smart devices, Maxim believes.  

MAX32660EVKIT# and MAX32652EVKIT# evaluation kits are also both available via Maxim’s website.

http://www.maximintegrated.com.

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