Hi, new here guys, not a total newb but need a bit of help IR2110 Inverter

MAGLATRON said:

5v onto the VDD of the IR2110's and the signal voltage of 3.3 volts

Click to expand...

Nmos has to turn on fully in your H-bridge. Can they do so when volt levels are that low? Can mixing the one voltage cooperate with the other voltage?

Bias voltage on the topside Nmos must be great enough to overcome voltage at the node between M1 M2 and between M3 M4. Sometimes there is need for a bootstrapping capacitor in order to increase voltage coming from the IC.

Hi,

What´s the use of D16, D18?

I don´t understand the idea of the 8 AC supplies
.
In my eyes it is exactly the same as using one 40V input.

Two of these sets does not make much sense unless they work with independent frequencies.
On the other hand: If all these use independent frequencies .. the series coneection makes no sense anyways.

If all have the same frequency and phase alignment ... then you just get a peak current once every full wave.
Much better would be (in my eyes) to invert the one set to get one half wave from the one leg and the other half wave from the other leg.
... or using full wave rectifier at all.

***
Your circuit misses
* bulk capacitor and fast capacitors at 5V supply
* the same for 12V supply
* fast capacitors at the bus bar supply

MAGLATRON said:

if I put 5v onto the VDD of the IR2110's and the signal voltage of 3.3 volt

Click to expand...

* 5V at IR2110_VDD
* 0V/3.3V signa level on IR2110_VIN and .._HIN?
According datasheet .. the signal levels may not be high enough for reliable switching. Check datasheet. Provide links to the used documents.

MAGLATRON said:

I can't get any wattage through r9- resistor right before the measureVoltshere tag

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You want to say that the full bridge has no function?

Your diagram shows power in Watts. This - if I´m not mistaken - needs a mathematical calculation. How did you calculate the power?

"Wattage through R9" is odd terminology.
"current through R9" would make more sense. This current is determind by the full bridge .. so focussing on full bridge would make sense.
What´s the idea behind R9 at all?

"Wattage dissipated by R9" would technically make sense ... but in most cases the main idea behind using a resistor is not to dissipate power...

****
Your load at the transformer output is a pure inductance. Do you understand that this means no "real power". All the energy you put in the inductance will be kicked back (to C3).
Using a meaningful resistive load would make more sense ... in my understanding.

***
The use of the whole circuit is unclear. Where does the input come from? Where does the output go to? What´s it´s voltage, current, power specifications?
Such global informations would be very useful ... to give better assistance.

Klaus

Also, what are you trying to do with L2 and L3?
Why are the AC sources connected to GND like that?

I suggest you tell us in details what you're trying to do.

so the eight voltage sources represent 8 coils on a radial generator and they all produce 10volts each, and 4 coils either side of the flywheel, and the wheel turns 8 times per second and there are 16magnets either side of the wheel so the frequency is (8 turns * 16 magnets) = 128Hz I want to achieve 20 watts from this circuit, feel free to modify and get me on the right track, that would be nice

as far as I know I did put in the bootstrap caps an the L1 and L2 is a transformer! I want 230 volts on the output and then run a 15watt motor, thanks

BradtheRad said:

Nmos has to turn on fully in your H-bridge. Can they do so when volt levels are that low? Can mixing the one voltage cooperate with the other voltage?

Bias voltage on the topside Nmos must be great enough to overcome voltage at the node between M1 M2 and between M3 M4. Sometimes there is need for a bootstrapping capacitor in order to increase voltage coming from the IC.

Click to expand...

so in detail I am in the process of building a machine with a flywheel and that turns around 480RPM there are 16 magnets either side of the flywheel and when turning they all put out 10volt DC, there are 4 coils either side of the wheel and they are all in phase i.e. a north passes all the coils at once and then a south pass all at the same time after that and continues like that, With minor modification they will be producing 15volt each. I have a toroidal transformer that is 15 : 230votls I am trying to get a steady dc voltage out of the coils to then put into the inverter part of the circuit at 50Hz and then put that new AC wave though the transformer and then power a 15watt motor. and I want to achieve 20 watt, that's the goal!! L3 represents the motor if you can modify the transformer L1 and L2 to be more realistic that would honestly be fantastic and the motor L3 needs to dissipate 15watts. I have taken out D16 and D18 too
Where does the input come from? Where does the output go to? What´s it´s voltage, current, power specifications? the input comes from the 10volt supplies the power goes to the inductor L3 which models the 15watt motor 230v 15watts needs current of 0.0652Amps but I want to reach 20watts to overcome any losses

KlausST said:

If all have the same frequency and phase alignment ... then you just get a peak current once every full wave.
Much better would be (in my eyes) to invert the one set to get one half wave from the one leg and the other half wave from the other leg.
... or using full wave rectifier at all.

Click to expand...

KlausST said:

Using a meaningful resistive load would make more sense ... in my understanding.

Click to expand...

could you please elaborate on those points?
here's the data sheet


in the typical connexion VDD is connected to VSS via capacitor

I believe the waveform of the coils will look like the one in this post

is there a way to simulate the waveform in LTSpice

would you like me to provide an image of the machine that I am building,? I'll get a couple of snaps soon!

Akanimo said:

Why are the AC sources connected to GND like that?

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A guy on maker.pro says that I shouldn't leave them floating, and when I put the ground in then it works!! how would you Akanimo wire it differently? please get back to me people the setup that I have in the sim means that I will have 40v and current capacity of two coils

so wondering if I did something wrong, when I go on latest activity my thread comes up with a line through it what does this mean?

The line through a thread title is gone after being approved by a moderator.

I tried a simple experiment with a ceiling fan, mounting a magnet so it passed by a coil of wire each rotation. I hoped to generate enough electricity so I could build an rps readout. It would turn on automatically when the fan was on. I'd know if the speed was hi, medium or low.

However it generated minuscule power. I'd need to duplicate the contraption several times around the fan housing, and even then it might not create sufficient power.

Picture a reverse situation... Use a motor as a generator. Normally drawing 20W (say 5V 4A). Is your situation comparable? The armature requires tight clearances between magnets and coils. Can you build armatures with similar tight clearance?

Or as an experimental study, can you obtain a comparable Johnson motor and mount it where something spins it? Fast enough to discover whether it can drive your project?

Please don't misunderstand me. I salute your intentions and wish you success.

As far as I understand, the thread is about simulation rather than real circuit results. You didn't provide the IR2110g symbol and model used in your simulation, thus we can't check it.

here is the spice IR2110g file

Seems like a strange request, to power a generator from a flywheel to turn a motor. To me that sounds more like a mechanical solution would be better than an electrical one. Can you elaborate on what this device is intended to do please.

The flywheel generator will not produce DC. It will produce AC but that can be rectified into DC. As already pointed out, wiring and using full wave rectification would be more efficient.

Brian.

I will post pictures of the machine later got to charge camera, I understand it is strange thing to do but the help will be greatly appreciated!
the voltage is rectified!

MAGLATRON said:

is there a way to simulate the waveform in LTSpice

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You can e.g. record the voltage with a digital oscilloscope and convert it to a PWL file, driving a LTspice voltage source.

ok I have an oscilloscope be it cheap and Chinese, how would I go about converting to PWL file for spice never done or even heard of that method I'll ask. chatgpt. I'll dig it out later

ok got it will use in the future when the machine ready

so this is my machine in its current state!! need to add a couple of things to it i.e. bearing trolley wheels, cores to the coils, but then it's ready to wire up

in the sim how do you find the max power it creates please?

so I figured out how to find average wattage of one coil!

This looks remarkably like a perpetual motion machine or one that magics energy from thin air. Please tell me it isn't.

Brian.

Hi,

more than 30MBytes of photos? I don´t download them.
Each photo can be reduced to 50kBytes (max 100kBytes) without losing thread related informations.
(reduce pixel count, reduce color quality)

Every camera, cell phone, laptop, PC of any OS probably will have simple tools on it to reduce file size.
Additionally there are online tools to do the same.

Klaus