High Efficiency Buck-Boost Battery Charger



Charlie Zhao – Applications Section Leader, Power Products

Today’s battery chargers are expected to support a variety of battery chemistries and accept a range of input voltages. In many applications, the input voltage range can vary from below the output battery voltage to above the battery voltage, requiring both step-down and step-up capability. In this video, we will show how the LTC4020 http://www.linear.com/product/LTC4020 controller meets these challenges, how it works and its main features.

The LTC4020 buck-boost battery charger works over a wide 4.5V to 55V input range, and produces output voltages up to 55V. It includes a buck-boost DC/DC controller and a PowerPath™ battery charger, optimized for a variety of battery chemistries. The LTC4020 has many features, including PowerPath instant-on, timer-based charging, battery temperature monitoring, input voltage regulation, charging status and fault reporting.

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OUTBACK MATE3 CHARGER SET POINT | Battery Setup | FNDC Battery Charge Factor (Efficiency)



How to set FNDC Battery Charge Factor | Battery Efficiency

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Review: Mighty Max Battery 100 watt Off Grid Solar Power System – 100w 12v -18v high Efficiency p..



https://amzn.to/2W0Xhfq – Mighty Max Battery 100 watt Off Grid Solar Power System – 100w 12v -18v high Efficiency polycrystalline Solar Panel Module Battery Charger for Marine and RV Solar Battery Brand Product
MLS-100WP is a 12v 18v 100 watt polycrystaline solar panel Dimensions: 40 inches x 27 inches x 1.40 inches. Pre drilled diodes in junction box and a pair of 35 inch cables with MC4 connectors already attached to the panel High efficiency solar cells based on innovative photovoltaic technology Strong aluminum frame manufactured to withstand a heavier snow load and high wind pressures, passing a snow load of 5400Pa. Pre drilled holes on the back of the panel for fast mounting and securing

Check this out for more info – https://www.youtube.com/channel/UCSHQP-LXRAY4GlqsBA6p2fw

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Measuring Efficiency of USB Charging



I wanted to measure the efficiency of various battery charging techniques. I connected a dummy battery to a real Sony NP-FZ100 battery with two multimeters in between in order to measure the voltage and current passing between them. I then put that dummy battery in the camera and two different USB chargers, and compared the power (voltage*current) being outputted to the real battery against the power being outputted by the USB port. The ratio of the two gives me the efficiency of the conversion from ~5V USB to ~7V camera battery.

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Increase Small Business Efficiency With Voice Mail To Email

Every business owner has a to-do list a mile long, and setting time aside to listen to and answer all of your emails at one time is not efficient. That's why voice mail to email is a great option for all sized businesses because you can get your voicemail messages delivered directly to your inbox. Voicemail delivery services will send all of your phone messages to your inbox as text and / or a sound file. This way you are able to read your voicemails as an email or listen to them over your computer using a media playback application. The greatest benefits of using this type of service are that you can increase efficiency and improve the overall competency level of your business.

Get Messages Anywhere

Gone are the days of needing to wait until you get back to the office to check phone messages. With voice mail to email delivery, you can check your voice messages anywhere you have access to your email. You can conduct business in a coffee shop or on an airplane, as long as you have email access. If you use your mobile phone as your business phone, having voicemail delivery is great in case of an emergency. If you misplace your phone, leave it at home, or end up with a dead battery and no way to charge it, you can still get all of your messages by checking your email. Voice mails are delivered within minutes, sometimes seconds, after being received.

If you run a business with multi-phone lines and something happens to your main phone system, you do not have to scurry around trying to figure out a backup system for answering client calls. You can have the calls redirected to a direct voicemail line and your employees or administrative staff can organize and file the messages according to client and importance. By having messages delivered to your email box, you reduce the risk of business setbacks due to technological failures.

Voice Mail to Email Allows You to Multitask

One of the greatest skills a business person can have is the ability to multitask. With message delivery services you can check your voicemail while speaking on the phone with another client, read your voicemails on your mobile phone while in a meeting and work on a project without worrying about answering the phone.

Since email lacks emotions, the voice mails will also be delivered as a .WAV file so that you may listen to them over your computer or mobile phone. This works great if you do not currently use a mobile phone as your main business line and your voicemail messages are rerouted elsewhere. By being able to listen to your messages, you can hear urgency, confusion, anger, and happiness in your client's voices, which can affect how quickly you respond to them.

By utilizing voice mail to email, you can also archive all of your voicemail messages in a saved file for future reference. Your clients will appreciate how quickly you are able to remember their past correspondence, and only you know that you have all of them displayed in front of you on the computer screen.

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PUE Hype and Realistic Expectations for Data Center Energy Efficiency

Power Usage Effectiveness (PUE) is a metric created by The Green Grid to determine the energy efficiency of a data center. PUE is a ratio, with overall efficiency improving as the quotient decreases toward unity. In other words, PUE measures the extra power needed to power, cool, protect, and manage the IT load in a data center.

Since the issuance of PUE, many data center managers are under pressure to drive the PUE of their facility lower. The notion of driving energy efficiency is a noble one, but the drive toward a PUE target is not a pragmatic endeavor.

PUE should be viewed as a tool, not a destination. While the PUE is based upon very simple math, PUE comparisons are very difficult. In fact, it’s dangerous to compare PUE values between data centers because so much depends upon where (with respect to the facility infrastructure) PUE readings are taken, as well as which data center energy components are included in the scoring. There are simply too many variations from facility to facility and from operator to operator to know if one has a true “apples to apples” comparison.

Enterprise executives concerned with this metric often reference the industry innovation giants of Google and Microsoft, who claim PUE values below 1.25. Companies such as this have very specific applications and architectures that enable them to take energy efficiency steps that may not be appropriate for the general enterprise. The strategies that some companies are using to achieve a certain PUE are extreme and are rarely suitable or fund-able for the typical enterprise data center.

The enterprise mission critical facility operator should be aware of cause and effect. If the facility is located in a shared-use building, PUE will be impacted by the non-data center power draw. High availability architectures are the nemesis of energy efficiency. Redundancy worsens PUE. Virtualization and consolidation often have a counter intuitive impact on energy efficiency. The electric bill may be better because of optimized use of server capacity, but PUE may be worse unless power and cooling are simultaneously downsized to align with the IT load. Similarly, raising server inlet temperature may improve PUE because of higher efficiency operation of cooling systems, but the electric bill may be worse if increased server fan power exceeds cooling system savings.

The mission critical facility operator should first understand PUE, then choose a measurement strategy, carefully consider options for PUE improvement, and make sure you don’t have a “PUE ending.”

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How Phone Systems For Small Office Help Enhance Collaboration And Efficiency

Regardless of whether you have a small office that several hundred individuals work in or a small office that just a dozen people work in, it's vital that you have the right kind of communication in the office to ensure both collaboration and efficiency in the workplace.

Phone systems for small office come in a variety of options that offer your growing business a wide range of benefits and features. One of the more advanced phone systems for small office is the VoIP phone system which operates on a voice Internet protocol – which is most likely the same system you use for other business communications for customers and employees.

There are quite a few things you need to look at when considering new phone systems for small office! The first thing that you have to consider is what your users (associates) require when utilizing these phone systems. If you do a lot of conferencing, then you'll require a conferencing option on your phone.

If you need one number which runs on one system with various rings, then you will need something such as a PBX system. Small businesses phones include features such as conferencing, mobile soft phones, automated attendant, paging, intercom, wireless, CRM system integration, unified messaging with email, text messaging or phone.

Do not purchase a phone if it does not have features you need and likewise do not purchase a phone which does have features you do not require because you would just be hiking up the price for things you will not ever use! You even have to be prepared for a change. If you are using regular land line phones now and plan to put in new phone systems for small office, you may want to have a meeting with your employees to show them how to work the new system so that they could better adhere to it.

Schedule a meeting, round everyone up in groups, and show various aspects of the phone to your people, how to work them, and let them know that if they have any issues adjusting to new phone systems for small office that they are more than welcome to ask you (or whomever is in charge) any questions about the system.

Sometimes its hard to go from something pretty archaic to something really innovative, so just ensure everyone knows what they're doing and you must be good to go! In order to discover the best phone systems for small office, take a look on-line! There are web sites which are designed for this specific kind of product.

They should have a quote option on their website that will allow you to input some aspects you need from the new phone systems for small office and they should be able to give you a quote on what the price will be and maybe some suggestions on the type of phones you should be looking at!

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John Bedini’s Tesla Solar Tracker 5 (LifePO4 version) : efficiency test #1



This test is to have a clear idea of the efficiency of the Tesla Solar Tracker 5 (LifePO4) charger, hand-built by the legendary John Bedini.

* Part #1 : introduction and oscilloscope overview of charger output
Part #2 : Energy requirements in Wh to charge the 10A LifePO4 battery
Part #3 : Measured Wh discharge of 10A LifePO4 battery
Part #4 : Comparison with 93% efficient Victron MPPT and conclusion

Webshop of charger
http://www.teslagenx.com/chargers/tx-tst5.html?category=chargers

Measurements are done with 2 Portapow – premium power monitor devices
on the input and output of the TST5 charger and the build-in power monitor of the Mobisun Pro – Portable Solar Generator.

Power Monitors

10A LifePO4 battery is built-in into the portable Solar Generator Mobisun Pro and is directly connected to the TST5 with its internal 93% efficient MPPT disabled.
https://www.mobisun.com/mobisun-pro-portable-solar-panel-battery-generator-230v/

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Cost Efficiency and Performance Drives Organizations to Cloud Computing

In the past decade there have been various achievements for the IT world and amongst that Cloud Computing is a very important one. Cloud Computing has consistently evolved and has turned into an ultimate IT solution for any organizations computing needs.

With all the benefits that Cloud Computing offers to users the major ones being reduction in capital costs and improved efficiency it makes an organization very flexible. The USP of Cloud has always been cost savings for the organizations. It also brings the organizations load of looking after maintenance and support activities. In addition to that it also allows the users to shift focus to more important business activities thereby increasing productivity.

Even though there have been various issues with the cloud initially but now more and more businesses are moving to the cloud and making use of the latest in technology to give their businesses a competitive edge over others. SMB's also have embroidered the cloud given the cost advantages it provides to the company. And large organizations that adopt cloud computing usually do so as way to transfer their not so important aspects of business to the cloud resulting cost reduction for the company.

The Cloud is used in various ways:

Many people know cloud computing as a single solution. However, there are various ways to deploy a cloud solution based on an organizations requirements and budget. The Cloud is split into three delivery models viz. the Public Cloud, the Private Cloud and the Hybrid Cloud.

Many users adopt the Public Cloud model which is third party service often provided for a fee or rent for using the computing resources of the service provider. On the contrary, a Private Cloud is a set-up on the organization premises to be used exclusively by the business and partners only. It may be cost to deploy a private cloud but it has its own set of advantages as well including increased security and controlled access to data. A Hybrid Cloud on the other hand is combining the public and the private cloud. It makes possible use of both the cloud environments by shifting the work according to the needs.

With competition intensifying day by day it is necessary for businesses to switch to more modern and flexible IT solutions like Cloud Computing and reduce their dependence on traditional systems. However, it is also necessary to make a proper analysis of all the three models of Cloud computing before choosing anyone for the organization.

The Cloud is a very useful IT solution and businesses need to assess their requirements properly to deploy the correct model and make use of this highly efficient technology and boost their productivity.

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High Efficiency Bridgeless Single Power Conversion Battery Charger for Light Electric Vehicles



High Efficiency Bridgeless Single Power Conversion Battery Charger for Light Electric Vehicles

Charging batteries of light electric vehicles require chargers with high efficiency and a high power factor. To meet this need, this paper presents a bridgeless single-power-conversion battery charger composed of an isolated step-up ac-dc converter with a series-resonance circuit. The bridgeless configuration reduces the conduction losses associated with the input diode rectifier, and the series-resonance circuit reduces the reverse-recovery losses of the output diodes by providing zero-current switching. In addition, direct and series-resonance current injections enable bidirectional core excitation by the transformer, thereby allowing high-power capability. The control algorithm derived from feedback linearization is also developed, which allows the proposed charger to correct the power factor and regulate the output power in a single-stage power conversion. This simple circuit structure leads to high efficiency and a high power factor. The theoretical concepts of the proposed charger are verified experimentally using a 1.7-kW prototype.

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