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ujjwol77 said:
I am doing a project called ACTIVE POWER FILTER and I have to identify the fundamental frequency component of a signal using Atmega16. Now i believe I have two use DFT or FFT to extract the fundamental frequency component from a signal. But I am having a hard time implementing this on ATmega16.
Can anyone help me
You should first remove the Fundamental Component (fundamental wave removing circuit : Frequency ie 50 or 60Hz) by R L C network on current sensing circuit (Current Transformer) of harmonic current generating load side & you will able to extract the present harmonics current from harmonic current generating load end,which will feed the harmonics waveform into deffrential amplifier circuit with Active harmonic filter current feedback.The deffrentiated waveform will send to A/D conversion stage to control the IGBT module by ATmega16.
for detail you may logon on my website http://www.nijus.com
inorder to meet the increased demand with out interruption of supply we need to connect the transformers in parallel. such that the capacity of system increases
You verify the voltage pick that motor gets at the start, maybe it is the cause of your problem, you should change those capacitors.
Current is Flow of of Electrons. That is taught in High Schools throughout the world. But is it so simple. In DC current flows in one direction, truely. But it is supposed to flow at a rate of 300,000 Km per seconds. But does it. No it flows at a rate of a few centimetres per min. only. To complicate the matter there is the case of AC currents, that does not flow in any one direction. If flow of electron is considered, in AC current the electron only wiggles about a point doing the work, eg. illuminating the light bulb or rotating the motor. However the magnetic waves associated it with it travels at that light speed i.e., 300,000 Km. How that can be explained.
ha ha ha ha ha ha ………………..!!!
Dear it produces it bcz its construction is loose. The strips by which it has made are lose therefore.
HHH
1 ton airconditioner ( 12000BTU/Hr) at 220volts 60 hz total line current rating between 6 to 8 amperes ( max for 1Ø and for 3Ø devide it with 1.73 ) it depend on ambient temperature the higher the temperature the higher the current, example 8Ax220V= 1760 watts
Regards,
HVAC consultant
You can’t beat the Electricity / Water analogy for explaining how electricity works! Just try typing it into google.
Hi there
What electric vehicles do you expect to use the charging station? If they are only a specific kind of vehicle, you would require the specifications from the vehicle manufacturer. If the stations are intended for public use, then the charging points must be suitable for all possible vehicle manufacturers. There are international standards currently being drafted regarding electric vehicle charging, and this is a big issue if electric vehicles ever become mainstream. Anything you install now should be future proofed for these standards that are imminent.
What type of charging stations do you require? Standard charging of fast charging? This greatly affects the electrical capacity and infrastructure required. For example, for standard charging (typical full charge around 8 hours), a domestic type socket outlet is suitable, or fast or rapid charging can charge a vehicle battery in approximately 20 minutes – but a three-phase supply is required.
You would also want to ask questions regarding ownership of the chargers. Would you want to charge users for the electricity they use? How would you do this?
There really are many issues to consider.
Tying to answer your original question, here in the UK Elektromotive manufacture a product called Elecktrobay. This is one of many manufacturers, and although they may not be appropriate in your case, it is well worth having a scout around their website to get a better idea of what is needed. http://www.elektromotive.com This kind of company also install the charging posts, and the use of a local company like this would be recommended as they should be aware of the many issues surrounding electric vehicle charging infrastructures.
Finally, any electrical charging infrastructure you provide would have to meet your national wiring regulations, and although I am not aware of the French codes, I would assume they are based on European Harmonised documents and would required over-current protection etc (certainly protection would be required at the source of supply – i.e. in the switchboard!).
Hope this is of some use.
dear,
if you have the finale degree as enginneering; my opinion, you should prefer the heiolienne project.
best regard
as per std. ton/ac unit at 220 v , it would take around 3.5 kw .
for 2 phase system , load kw will be come down .
why not u go for std. manufacturer catalog, where u will get all necessary inf. for each ton of ac unit .
thanks
current is flow of charge……..the no.of columbs passed a point in one second………is called current
i.e., I=c/s…..current uints are columbs/second (or) amperes…..
for detailed information go through this video……it will be clear those who got dout
file:///F:/LECTURES/what%20is%20voltage%20and%20current.mp4…..
Here is an online amperage chart that might help Dave.
waqas said:
ist of all we'll calculate total kw of all componants, which are proposed to install on sable. then find out the ampers from power formula. and then we multiply the total amperes with 3, in case of inductive load. then we will select the suitable cable according to our calculated amperes from cable chart.
You can find a welding cable chart here of a basic amperage chart here.
