Friday 31 August 2018

Time for ambient energy harvesting from RF signals

wireless energy harvesting, maybe to help power smart sensors and IoT…
The aim of the project, Chaoyun tells us, is to help develop cutting-edge solutions for energy harvesting from ambient signals, whether mobile, TV or WiFi signals. And as a result he has produced a battery-free quartz clock with wireless sensing functions.


Among all the options, he says, RF energy sources are becoming increasingly popular since they are ubiquitously available in most domestic environments regardless of the time, weather and environmental conditions.
“In this project, we have developed the broadband rectifying-antenna (rectenna) technology, which could capture, rectify and convert the RF power of signals over a wide spectrum into DC power. We have significantly overcome the problems on antenna and circuit integration, in particular, a number of novel impedance matching techniques have been developed for such broadband rectennas.”
“More importantly, we have also invented a cutting-edge technique to effectively integrate the antenna to the rectifying and power management circuit without the need of extra matching networks and circuit components, thus reducing the cost, power loss and manufacturing complexity of the product. This technology has been filed to a US patent (US Patent 9,966,656), and bought by a US company.”
The full details of this work have been published on the IEEE, see “Novel Quartz Clock with Integrated Wireless Energy Harvesting and Sensing Functions“, IEEE Transactions on Industrial Electronics (May 2018).

Panchsheel Benefits of Power Quality Studies @ Industries

In order for your Industry or Plant to run efficiently and effectively, you need electricity. If you experience a dip or spike in power, your efficiency suffers, and you run the risk of several other problems. In order to prevent issues and allow your industry to perform at its best, you need to conduct power quality studies. A power quality study refers to the delivery of the necessary energy to electronic equipment in order for it to run properly. 
Here are a Major benefits of power quality studies why you need them for your Industry.

What is a Power Quality Study?

A power quality study measures the supply of power to AC power units. This includes voltage, current or power factor. A sudden, or even a gradual, change in power can greatly affect your power quality, reducing your efficiency or causing other problems.

1. Power Quality Studies Detect Disturbances
Power quality studies are diagnostic tests performed on your machines to tell how they are doing. Pro Circuit provides temporary monitoring of these machines and your power systems to check for power distribution and possible disturbances that can decrease productivity. By detecting issues early on, you can fix them before they become much bigger problems.

2.Power Quality Studies Prevent Interruptions

When you have an interruption of power – be it a dip, a spike, a surge or an outage – your service, and your machines, stops, even if only briefly. Even a brief interruption, especially several over many days, weeks or months, can lead to significant decreases in efficiency and productivity. When you suffer these interruptions, your output, in turn, suffers as well.

3.Power Quality Studies Save Money

If your power is not optimal, or is interrupted, your business faces severe decreases in productivity. Not only that, but power surges or dips can lead to malfunctioning, or even broken, equipment. When this happens, you need to have your machinery fixed. These fixes can be costly. So, not only do you lose out on money because you’re not producing as much as you would normally be able to, but you lose even more to repairs. By not earning as much and spending more, this brings you further away from your financial goals. By finding issues head on, power quality studies not only help you save money, they can even help you generate more revenue in the long run.

4.Power Quality Studies Allow for New Machinery

If you add new machinery, your power gets redistributed in an attempt to run it along with all of your current machines. If your service or panel isn’t big enough, you are likely to run into dips in power and decreased productivity. Before you add new equipment, a power quality study can tell you if you need to upgrade your service or increase the size of your panel in order to keep your efficiency and productivity the same, if not better.

5.Power Quality Studies Increase Safety

If power is improperly provided to machines, they run the risk of overheating. When machines overheat, they run the risk of breaking down. Some overheated machines can even catch fire, which creates a very dangerous situation for not just your business, but your employees as well. When your business is destroyed by fire, you lose money to repairs and by being completely shut down. But if the fire is devastating enough, your employees could be injured, if not worse. Power quality studies can help prevent any of these problems from happening by detecting issues early on.

Don’t let your efficiency and productivity suffer. #Emerich can provide you with power quality studies, keeping your Industries running Effectively. 

Contact us today to request a best offer for your power quality study!

Thursday 30 August 2018

Fast 350 kW charging Station

This is a fast charging station for electric cars, capable of delivering 350 kW  to each of several vehicles – over 100x the power of a 13A plug charge at home. 

In this case, the station is the first in Germany built by Fastned, which operates 73 stations in the Netherlands and is preparing to expand into the UK and Belgium. By the end of the year, 18 stations are scheduled to be installed in Germany.
“As a result of falling battery prices, more and more affordable electric cars with a larger battery and more range are coming onto the market. This makes it possible to travel more distances by car, but it also increases the need for a fast-charging infrastructure,” said the firm, claiming: “Thanks to these stations, charging becomes more comparable to refuelling.”
Fastned’s goal is to build a network of more than 1,000 fast charging stations in Europe, making long-distance travel possible without long stops.
Charging is initiated by a phone app or with a charge card. Billing is via charge card, debit card or credit card.
All of its charging power comes from renewable solar and wind energy, according to Fastned, including some contribution from solar modules on the roof of the charging station.

Tuesday 28 August 2018

Basics of Harmonics...

Harmonic is multiple order of the fundamental frequency and it can be voltage and current in an electric power system are a result of non-linear electric loads. Harmonic frequencies in the power grid are a frequent cause of power quality problems. Harmonics in power systems result in increased heating in the equipment and conductors, misfiring in variable speed drives, and torque pulsations in motors. Reduction of harmonics is considered desirable.

In a normal alternating current power system, the current varies sinusoidally at a specific frequency, usually 50 or 60 hertz. When a linear electrical load is connected to the system, it draws a sinusoidal current at the same frequency as the voltage (though usually not in phase with the voltage)
Current harmonics are caused by non-linear loads. When a non-linear load, such as a rectifier is connected to the system, it draws a current that is not necessarily sinusoidal. The current waveform can become quite complex, depending on the type of load and its interaction with other components of the system. Regardless of how complex the current waveform becomes, as described through Fourier series analysis, it is possible to deconstruct it into a series of simple sinusoid, which start at the power system fundamental frequency and occur at integer multiples of the fundamental frequency.
Further examples of non-linear loads include common office equipment such as computers and printers, Fluorescent lighting, battery chargers and also variable-speed drives.
In power systems, harmonics are defined as positive integer multiples of the fundamental frequency. Thus, the third order harmonic is the third multiple of the fundamental frequency. This type of harmonics is generated in non-linear loads. Examples of nonlinear loads include transistors, electrical motors, and the non-ideal transformer. Non-linear loads create disturbances in the fundamental harmonic, which produce all types of harmonics. However, in this section we focus on the 3rd order harmonic due to its certain special characteristics in the context of powers systems

Power is supplied by a three phase system, where each phase is 120 degrees apart. This is done for two reasons: Firstly it is because generators/motors that use three phases are more efficient due to the constant torque the phases supply, and secondly it is because after power is supplied to a load, the three phases can theoretically be added onto a neutral wire and cancel each other out. This saves the utility from creating return wiring to the power plant. However, if the 3 phases contain 3rd order harmonics, the currents will not fully add to zero. As seen in the figure, the 3rd harmonic will add constructively with the 3rd harmonics within the other phases. This leads to an oscillating current in the neutral wire, which can be dangerous since it is designed (i.e. small-size conductors) to carry minimal current.


Voltage harmonics are mostly caused by current harmonics. The voltage provided by the voltage source will be distorted by current harmonics due to source impedance. If the source impedance of the voltage source is small, current harmonics will cause only small voltage harmonics. It is typically the case that voltage harmonics are indeed small compared to current harmonics. For that reason, the voltage waveform can usually be approximated by the fundamental frequency of voltage. If this approximation is used, current harmonics produce no effect on the real power transferred to the load. An intuitive way to see this comes from sketching the voltage wave at fundamental frequency and overlaying a current harmonic with no phase shift (in order to more easily observe the following phenomenon). What can be observed is that for every period of voltage, there is equal area above the horizontal axis and below the current harmonic wave as there is below the axis and above the current harmonic wave. This means that the average real power contributed by current harmonics is equal to zero. However, if higher harmonics of voltage are considered, then current harmonics do make a contribution to the real power transferred to the load.


Harmonics are caused by distortions to the underlying sinusoid of any signal, be it power, audio, radio frequency, even mechanical vibrations. Harmonic behaviour is defined by the Bullard Laws Of Harmonics
  1. Harmonic amplitudes are proportional to the area of the distortion.
  2. The Harmonic Signature is the result of the angle where the sinusoid impacts the distortion as predicted by the Bullard Harmonic Solution.
  3. Even harmonics don't appear in symmetrical distortion because they cancel each other out.
  4. When a portion of a sinusoid is removed (such as in clipping), the Harmonic Signature mirrors the harmonic signature of the feature removed from the sinusoid.
  5. Square waves, triangle waves and all other kinds of waveforms obey these rules and their harmonic behaviour can be predicted with simple mathematical formulas.
Harmonics are caused by steady-state distortions to current and voltage waves and repeat every cycle. They are different from transient distortions such as spikes, dips and impulses.

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Wednesday 1 August 2018

Emerich Energy recognized for Innovative in Power Quality & Energy Storage by Govt of India (DIPP-Start-Up India Initiative)

We take privilege to share our important milestone..
Emerich Energy Private Limited Company got recognition by Govt of India,Department of Industrial Policy and Promotion (DIPP) under the STARTUP INDIA scheme for Innovative Start up and Uniqueness in Power Quality solutions.
On this moment we thank our Honorable Prime Minister “Narendra Modi” initiative to help through “Make in India” and new Entrepreneurs through STARTUP INDIA  has been a great success. We are glad that Emerich is also now joined and part of this startup India campaign.  
We gratified to exhibit the of the Certificate of Recognition by DIPP