“The EMerge Alliance was established to promote the rapid adoption of safe, low-voltage DC power distribution and use in commercial building interiors.” EMerge Alliance – Safe Low-voltage Power Twitter Interface – @EMergeAlliance – Promoting adoption of Safe Low-voltage DC Interior Power Distribution. Highlights Occupied Space: The first available EMerge Alliance Standard creates a 24-volt DC microgrid for use in commercial interiors, featuring safety and flexibility along with efficiency benefits. See Registered Products. Data Centers: A 380-volt DC power standard focused on data center and telecommunication applications is under development. View Presentation. . EMerge Alliance 24 volt DC power system demo [Read More ....]
Power Electronics
Power Controls, Supplies, Drives.
Uses MAX712/MAX713 fast charge controllers. PCB Design too. The only difference between them is the battery-fully-charged sensing method. The MAX713 is designed for NiCd batteries, while the 712 is for NiMh batteries. Fast, smart and universal NiCd/NiMh battery charger This is a project by Roberto Barrios at his Ham Projects EB4EQA Site. Application Note – The MAX712 terminates fast charge by detecting zero voltage slope, while the MAX713 uses a negative voltage-slope detection scheme. Fast-Charge Controllers – MAX712 and MAX713 Some Specs Charge 1 to 16 Series Cells Supply Battery’s Load While Charging (Linear Mode) Fast Charge from C/4 to [Read More ....]
Some very useful, educative and interactive Java Applets. Tutorials around Power Electronics. Includes Diode and SCR Circuits, Controlled 1/3 Phase SCR-Thyristor Bridge Rectifier and Switch-Mode Power Supplies SMPS. Power electronics-interactive text They include Simple diode, SCR and thyristor controlled bridge rectifier circuits and most important the Switch-Mode Power Supply SMPS. Simulations like these can be made with various methods. Client Side and Server Side. Flash, Java and Ajax(with dhtml) can be client side. Server side are numerous. Perl and CGI, Python, PHP and many more. Small Tutorials can be made in Flash. More Flexibility and Power in Java. Ajax (implies [Read More ....]
Presented in a Easy to understand, layman language. This Energy and Electrical Basics is a must for all who want to save power and lead a Green Lifestyle. Undertand your Appliance and The Energy Supplier. The way electricity is generated and reaches your home. CIPCO Energy Library – Electrical Study A class in basic electricity and how the electric utility industry generates and delivers power to customers. Designed primarily for use by utility field representatives who need to understand electrical principles. – Fundamentals of Electricity Covers the subject of motors from an explanation of how they work, to the advantages/disadvantages [Read More ....]
To make an analog design using log amps or multipliers, discovercircuits – four-quad is good for learning. Using a uP for math is better. Look at these links below. Build a Power Meter ! The Metrics for Going Green is with a Energy/Power/Watt meter. Related Reading Allegro Hall-Effect Sensor ICs Using a Hall Effect Current Sensor Clamp Hall effect Sensors at Honeywell AC Metering Circuits – Power measurement Wireless home-power monitoring system EnerJar – The DIY power meter
This Chip from TI is simple to integrate into your designs and this solution is good for production of lighting gadgets, here a consistent quality and predictable performance is easily obtained. TPS61042 30-V, 500-mA Switch Boost Converter in QFN-8 for White LED Applications LED-driver application that drives four LEDs with 20 mA of forward current and operates from an input voltage range of 1.8 to 6.0 V. The entire circuit consists of the control IC, two small ceramic caps, an inductor, a diode, and a current sense resistor. The primary power-supply functions and the secondary features such as load disconnect, [Read More ....]
LED Drive Solutions and Power Supply Design ideas. Robust and efficient high-brightness LED drivers. Zetex have LED drivers for boost/buck they are cost effective too, Zetex range of LED drivers – Diodes Incorporated Shown below is a design from an Application Note of Zetex. Here ZXSC400 drives a Luxeon V Star LED. The input voltage ranges from 4.2V to 5.4 V with a maximum output current of 700mA at 5V input. ZXSC400 – LED driver boost converter Voltage mode boost converter in the SOT23-6 package. Its low feedback voltage allows the current in a chain of LEDs to be set [Read More ....]
Here you can understand how to drive white LED’ s for flashlight or Internal lamp. I have tried substituting for tubelights and bulbs. These LED’s are amazing. The amount of light at even 100mW is phenomenal. The future is indeed LED Lights. But more Amber component is required in LED to give the warm feeling of an Edison Lamp. Why Drive White LEDs with Constant Current? – Maxim The MAX1561/MAX1599 include an internal, high-voltage, low-RDS(ON) N-channel MOSFET switch for high efficiency and maximum battery life. A single DualMode input provides a simple means of brightness adjustment and on/off control. Fast [Read More ....]
The LDS8711 is a fixed frequency current mode boost converter with internal rectifier and cycle-by- cycle switch current limit specifically designed to drive a string of up to 10 White LEDs. Aa Switching Converter Chip with hardly any external components driving a HB LED chain. HB – High Brightness LED. This IC is from IXYS Power Devices. High efficiency boost converter with the input voltage range from 2.7 to 5.5 V . Drives one LED string with 10 LEDs in series up to 32 mA. 250 mV current sense voltage No external Schottky Required 0.7 MHz Switching Frequency Efficiency greater [Read More ....]
