Electronics > Beginners
nobody talking about switching PS wasting power on input filter caps?
Ice-Tea:
--- Quote from: radiolistener on August 24, 2019, 03:33:14 pm ---Ice-Tea, AC generator needs to change voltage from + to - and then again to + and then again to - in a loop....
--- End quote ---
I have no idea how to explain this to you. However, you will not find anyone on this board or on another tech-savvy forum that agrees with you. Unless it's called "Free Energy For All" or something. This should tell you something. And perhaps it should bring you to read up on the subject.
radiolistener:
--- Quote from: soldar on August 24, 2019, 03:34:57 pm ---You are totally wrong here
--- End quote ---
Can you please explain, what is wrong exactly?
I'm talking that reactive load, such as capacitor or inductor will return some part of power back to the AC power source. This power will be used against AC power source.
In simple words, capactior trying to filter AC voltage and make DC. On the contrary AC generator trying to make AC voltage. So they fight each other.
What is wrong here?
Ice-Tea:
--- Quote from: radiolistener on August 24, 2019, 04:02:01 pm ---I'm talking that reactive load, such as capacitor or inductor will return some part of power back to the AC power source.
--- End quote ---
Yes.
--- Quote ---This power will be used against AC power source.
--- End quote ---
No. Look at the diagram I posted earlier. The power returned to the source takes load *off* it, it doesnt add to it.
james_s:
Eventually perhaps it will sink in and you will understand what we are trying to say. Until then just accept that a reactive load does not cause the generator to draw more mechanical energy from the engine, turbine or whatever is driving it, beyond the small percentage that becomes heat in the windings and wiring. The fact that you do not grasp how this can happen does not make it any less true. It is easily demonstrated though if you can find a portable AC genset and some capacitors or inductors.
radiolistener:
--- Quote from: Ice-Tea on August 24, 2019, 03:52:39 pm ---I have no idea how to explain this to you. However, you will not find anyone on this board or on another tech-savvy forum that agrees with you. Unless it's called "Free Energy For All" or something. This should tell you something. And perhaps it should bring you to read up on the subject.
--- End quote ---
There is no "Free Energy For All" at all, there is only wasted energy.
--- Quote from: Ice-Tea on August 24, 2019, 04:09:49 pm ---No. Look at the diagram I posted earlier.
--- End quote ---
Just imagine DC battery with + and - terminals. And capactior with A and B terminals.
Now connect DC battery to capacitor: + to A and - to B. The capacitor will be charged.
Now connect DC battery to capacitor with reversed polarity (this is how AC current works): - to A and + to B. The capacitor first will be discharged through DC battery and then charged to reversed polarity.
Let's assume that capacitor charge takes energy E from battery. So, during experiment you spent 3*E energy (charge+discharge+charge) from DC battery. But capacitor stores just 1*E energy. So, you're lose 2*E energy.
And note, this energy is NOT consumed by capacitor. It is consumed by DC battery. This is wasted energy of DC battery.
The same things happens with AC generator with connected capacitor on the output.
On rise edge of sine wave capacitor will be charged from AC generator. On falling edge of sine wave capacitor will be discharged to AC generator and then charged again in reverse polarity. It happens in a loop.
As you can see, on falling edge capacitor will be discharged to AC generator.
It means that current from capacitor (which flows through AC generator) will make resistance to mechanical rotation. And you will spend more gasoline for AC generator rotation. You're just wasted that energy.
This is something like use gasoline to move car from point A to point B and then move it back to point A. Gasoline wasted and the car is staying at the point where it was before :)
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version