Hi everyone.
@ Fighter.
This weekend I took up your ZPM to see how
the frequency/duty variation can be controlled
based on the load applied to it.
That way I think it will be easier for more people to replicate it.
I'll keep you posted.
Below are the STL files I used for the reels.
YoElMiCrO.
Hello everyone. @Jagau.
Let's talk about energy... Imagine a 25% duty at 1Hz applied to the same circuit. The energy supplied by the DC source will be... (Vrl^2/Rl)Ton=E(Supply). (100/10)0.25=2.5J/s. Since the frequency is 1Hz, the power will be 2.5W, just that. DC sources don't know what they're feeding; they only know the energy that came out of them over time.
YoElMiCrO.
In a pure 10-ohm resistor with a constant voltage of 10 volts flowing through it, the current will be 1 ampere. As in your example, the DTC is 25%, so the average power, which when using a pure ohmic resistor, will also be equal to the instantaneous power, therefore 2.5 watts. This is verified by your formulas, and it is normal in this case of power with a pulsed circuit using a pure resistor for the power to be constant.
Since we are talking about the ZPM and we are using components that store and release energy (coils), in this case, the instantaneous power will be different from the average power because the current through the inductor increases from 0 amperes. The initial instantaneous power will therefore be from 0 watts to a maximum of 4.33 watts, as in the following example.
Experiment already performed on the ZPM with this figure: Yellow PWM pulse , Green Current probe
On the oscilloscope, we can see that the current increases linearly with a starting voltage of 0 amperes.
The PS tells us that 4.33 watts comes out of it making an average of 4.33 Watts, yet at the beginning we have 0 amps and therefore 0 watts of power, it interprets a maximum power as an average power. The PS therefore makes an average power of 24 x .18 = 4.33 watts it does not know that this power is transmitted only 38.2% of the time starting at 0 watts and therefore considers the average at 4.33 watts random and not precise reading, as would a DDM connected to the input.
The power is not constant and we cannot trust the display of the DDM of the PS, they do not have the same formulas to use for the calculation of power and a DDM of PS cannot do that in addition to the frequency used. With an oscilloscope the average power displayed will be different, because it can do Pave = Vrms x Irms x DTC
The ZPM is beyond unity for sure.
Jagau
Hello everyone.
This is the method I use to calculate
the minimum power the power supply should provide
to a circuit like the Fighter ZPM.
I say minimum because I assume all components
are ideal, meaning lossless.
Here's the image.
YoElMiCrO.
it is always fascinating when i see how we can explain things if we use math and logic. the problem is, that sometimes it did not work as we think it should work.
what do i mean by that...
in the examples above we think, that current is always the same in its shape. but there are curcuits out there, which can produce current, that looks different on high side than on low side. when someone opens the door and led negative energy in, then every component in the circuit acts like an amplifier for this type of energy. you will see that, when you have huge voltage drop on tiny resistors (i have 5V voltage drop on 10mOhm Shunt for example) without any heat involved. all circuits on this website can do such things if the conditions is set.
high side of coil current can be 'ordinary DC' while on low-side we have huge components of reactive energy.
so in my opinion the best way to test such circuits is a battery which can be monitored over time.
have a nice day!
B
I agree with what you say, Beardorfer; everything can only be explained by math and logic.
In an electronic circuit, certain phenomena cannot be explained by logic alone. That's why we're all here, and the goal of our research is to try to replicate these phenomena, which are still difficult to explain.
An example:
We can see in this formula that the energy consumed by the coil in the circuit is added to the energy actually consumed by the resistive part of the coil.
On the other hand, an inductor does not consume energy; it stores it, and when an inductor releases energy at off time, it returns the stored energy back into the circuit as a temporary current source, thereby reducing the net consumption of energy from the external power source for that specific task.
This is why the energy from the power supply cannot and is not the same as the energy actually consumed in the circuit when using coils; wwe must calculate the difference between the energy actually consumed and the energy returned as in the case of the ZPM.
Jagau
No one online at the moment
