Wednesday, May 8, 2019

Electrical Safety and Clean Power

This is an educative and important guide for Electrical Equipment Safety. This can be also applied partially to Power Electronics and Home Energy Systems. Electronic Equipment also have to be maintained by Calibrating them and protecting them from environmental parameters like dust, grime, direct sunlight, moisture, humidity, sea wind (brine), corrosive fumes and chemicals. They should not be even placed near machines like a big lathe, sub-sonic or low frequency vibrations.

Electrical Safety Testing Reference Guide

Electrical Safety
Electrical Safety is a Serious Issue Electrical Safety in the workplace is the most important job of an electrical worker. No matter how much training one has received or how much employers try to safeguard their workers, Electrical Safety is ultimately the responsibility of the electrical worker.

Electrical Safety Hazards Handbook

Power Studies, Arc-Flash Hazard Labeling, Data Gathering and Inspection, Engineering Services.

The steps to osha electrical safety

Electrical Design, Lighting and most important Earthing or Grounding. Good Reference Articles and Product Reviews.

Electrical Construction and Maintenance Power Quality, National Electric Code, Construction, V/D/V, Ops, Equipment Rental Industry Resourc

Earthing or Grounding is something Audio Enthusiasts make a lot of fuss about. The Articles here about Balanced Power, Symmetrical Power Systems and Earthing throw light on ways to counter Audio Noise.
Clean Power

AC Power has the 50/60 Hz noise, now more AC noise can be picked up by poorly designed systems when so many gadgets around. These articles are also relevant for the instrumentation engineer. Dissonance is encountered when you build sensitive strain gauge based measurements or while measuring and transmitting micro-volts from a remote sensor to the dashboard/control panel.

Index of Technical Articles About Balanced Power

International leader in electromagnetic compatibility (EMC) and power quality (PQ). EMC Filters, RFI Suppression Chokes, Feedthrough Components.

Schaffner - electromagnetic compatibility

Schaffner - EMC/EMI components, harmonic filters & magnetic components.

Monday, April 15, 2019

Inverter S150 from Cotek - Current Solutions

This is a True Sine Wave Output Inverter with a THD 6% Typ. It is DC to AC Conveyor. That means you use Batteries to derive a High Voltage AC like the Mains Utility Supply.

Inverter S150 from Cotek

The output selection of 100/110/120 VAC covers the US region and similar areas. The input being 12VDC / 24VDC.  This is a small 150 Watts unit ideal for Small Solar power systems and lighting.

Inverter S150 from Cotek - Current Solutions

Specifications Include
  • Input & output fully isolation
  • Input polarity reverse / under voltage / over voltage protections
  • Output short circuit / overload / over temperature protections
  • Capable of driving highly reactive and capacitive loads
Current Solutions OEM Power Products

They match your product with the ideal power supply taking into account all the intricate variables..   

OEM Power Supply Resource Inverters, Converters and Adapter. They help you in selecting the proper power supply as they have the experience and the Specialists.

Current Solutions, Inc.
P.O. Box 1538, Land O' Lakes, FL 34639-3929, USA

Pure Sine Power Inverter 2KW - AIMS Power

AIMS Pure Sine Wave Power Inverters provide reliable transformation of DC power from a battery into AC power that can then be used to run lights computers, printers and even medical equipment.

2000 Watt Pure Sine Power Inverter

This is an industrial-grade unit with the ability to withstand surges of up to 6000 watts for 20 seconds, and  it achieves this by virtue of its direct connect terminal block. This feature is one of the more sought-after in the inverter industry, allowing users to surpass the 1,500 watt maximum output of a GFCI outlet that would typically be seen on an inverter.

2000 Watt Pure Sine Power Inverter

The 2000 watt 48 volt low frequency AIMS Power inverter charger transforms DC (direct current) power, produced by solar panels and stored by batteries, into AC (alternating current) electricity that can be used to run most all tools and appliances. This inverter also has a built in AC-to-DC battery converter charger, which allows users to recharge their battery bank from an AC source such as a fuel-powered generator, shore power or a regular outlet at home.

AIMS Power
9736 S. Virginia St. STE A Reno, NV 89511, USA

Manufactures, designs and distributes dc power inverters, chargers, transfer switches, and related green energy products.

Tuesday, April 2, 2019

Battery Boost Circuits

(This is a thread of my Google Talk many years ago - you will be able to notice text communication is quite difficult. sometimes even verbal expression will not specify the need, We need clear drawings and specs)

Sam: I was going thrugh some IC like MAX8880/MAX8881, can u help me with using that with input from my batteries?

dapj: let me see

Sam: It's datasheet says that Supply current [Iin] = 10uA max does it mean it will draw a max of 10uA from my battery?

dapj: it looks like it will work from 2.5 to 12V and it can give you a 5v out 200ma

Sam: Exactly!

dapj: is 5V enough 200mA too, but it cannot boost voltage

Sam: my concern is with my input. What about using rechargeable batteries [4x1, 2100mAh] to act as input to this IC. will it consume 10uA if I do so while my load to the output may vary from 100mA to 200uA

Battery Boost Circuits Max8880

dapj: if you want 5V you need to feed this atleast 5.5V this chip does not consume anything (the uA is Standby consumption )but it is not a voltage doublet or a charge pump

Step-Up/Step-Down Converter Features Ultra-Low Quiescent Current

Sam: OK, I need to feed it anything between 5.5 -12V, Do we get recharge battery near about 2V, 2100mA

dapj - a 12 v battery can be recharged when 11.8V is reached it may charge upto 12.8 V in Li ion

Fast, smart NiCD/NiMh battery charger - The MAX713 is designed for NiCd batteries, while the 712 is for NiMh batteries.

Tuesday, February 5, 2019

CM100E3U-12H - 100A 600V IGBT - Powerex

Each module consists of one IGBT Transistor having a reverse-connected superfast recovery free-wheel diode and an anode-collector connected superfast recovery free-wheel diode. The Powerex Chopper IGBTMOD Modules are designed for use in switching applications.

CM100E3U-12H - 100A 600V IGBT - Powerex

Built in Discrete Super-Fast Recovery (150ns) Free-Wheel Diode.  This is used in Power Product Designs like DC Motor Controls and Boost Regulators.

CM100E3U-12H - 100A 600V IGBT - Powerex

All components and interconnects are isolated from the heat sinking baseplate, offering simplified system  assembly and thermal management.

Features
  • Low Drive Power
  • Low VCE(sat)
  • High Frequency Operation (15-20kHz)
  • Isolated Baseplate for Easy Heat Sinking
Powerex, Inc.
173 Pavilion Lane, Youngwood, PA 1569715697, USA.

Monday, February 4, 2019

MPower Solutions - Battery Management

Custom Battery Packs, Battery Management Systems, Batteries 101, Battery Technology Encyclopaedia and Tutorial. Chargers & Charging, Battery Management and Cell Chemistries.

MPower Solutions - Battery Management

The site contains a comprehensive knowledge base about battery technology, battery applications, chargers and ancillary equipment.

MPower is an independent service company providing specialist design and manufacturing services to meet the portable power requirements of the European electronics industry.

MPower Solutions -Engineering and Manufacturing

Fuel cells have been around longer than most batteries - the principle of the fuel cell was discovered in 1839 by Sir William Grove. They generate electricity from the reaction of hydrogen with oxygen to form water in a process which is the reverse of electrolysis.

Battery and Energy Technologies

The fuel cell relies on a basic oxidation/reduction reaction, as with a battery, but the reaction takes place on the fuel rather than the electrodes. The fuel cell produces electricity as long as the cell receives a supply of fuel and can dispose of the oxidized old fuel .

Woodbank Communications Ltd
Woodbank, South Crescent Road , Queens Park Chester, CH4 7AU United Kingdom.

High Efficiency Step Down Isolated Supply

60W AC-DC adapter, synchronous rectification, fixed frequency current mode PWM controller. Very Low Quiescent Burden, Efficiency above 85%. That's Green.

STMicroelectronics - EVALSTSR30-60W. Synchronous rectification using L6668 and STSR30.

EVALSTSR30-60W: 60W AC-DC adapter
EVALSTSR30-60W: 60W AC-DC adapter

The converter works in both Continuous and Discontinuous conduction mode depending on the input voltage (the circuit has a wide input voltage range) and the output load. The 68-kHz switching frequency provides a good compromise between the transformer size and the harmonics of the switching frequency, optimizing input filter.

High Efficiency Step Down Isolated Supply

The input section includes protection elements (varistor, fuse and NTC for inrush current limiting), a standard Pi-filter for EMC suppression, a bridge and an electrolytic bulk capacitor as the front-end AC-DC converter. The transformer is a layer type, uses a standard ETD34 ferrite core and is designed to have a reflected voltage of 95V. The power MOS is a 700V - 1Ω and a transil clamp network is used for leakage inductance demagnetization.

From STMicroelectronics

Tuesday, January 1, 2019

Schott Magnetics - Inductors Transformers Coils

Schott Magnetics designs and manufactures custom and standard inductors, transformers, coils, toroid magnetics, chokes and custom designed magnetic components.

Schott Magnetics - Inductors Transformers Coils

Cost effective transformers and inductors for the power supply, avionics, military, medical, test & measurement, industrial, automotive and commercial applications.

History - "Schott began as a part-time home business in 1946 by its founder, Oscar A. Schott. Due to Oscar’s unique talents in electrical engineering, many companies approached Oscar to build prototype transformers and coils. In 1951, Schott became a full time corporation."

 SMU1330 Series Drum Core Inductors

SMU1330 Series Drum Core Inductors

High energy storage and low resistance, Ideal for DC-DC step-up or step-down conversion, Reliable surface mounting, flat top for pick and place.

Schott Sales and Engineering
210 St. Olaf Ave, N. Canby, MN 56220, USA.