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grounding question(not yet solved sorry)
Should our inverter driver(mcu, opamps,ir2112) have the same ground with our dc link(rail which is almost 450V)?
our circuit is like what is in section 6(inverter section) of this pdf
**broken link removed**
now we don't know if the our DRIVER's...
we measured the current from the output of the inverter to the run terminal, it was only 0.052A max. where in normal operations(plugged to the outlet) the current is around 0.5A, how can we generate more current for the ref to run in normal conditions?
We're trying to run a refrigerator by using inverters. At first we observed what is happening on the relay when the refrigerator is plugged at the outlet. It clicks and then the refrigerator starts(vibrations and sounds coming out from the compressor). THen we tried using the relay to with our...
What would be the effect if we increase the value of the capacitor?[COLOR="Silver"]
---------- Post added at 10:45 ---------- Previous post was at 10:36 ----------
We used a bridge rectifier which is 35A, 600V. We just used the 1n400X for multisim to see our schematic.
a side question. If there is a rating in the data sheet of the rectifier that says "35A,600V" does that mean that is its maximum limit when it comes to its input?
Are you saying the value...
So your saying i should check the HO and LO pins of my driver when the load is the refrigerator?
we are hearing a ticking noise, so be believe we must be inputting something in the refrigerator.
we just have a theory that our voltage rail might lack the current needed to run the compressor in...
- Yes our input voltage come from the outlet.
- we didn't use an isolation transformer before the rectifier. what you see in our schematic is our actual circuit.
- We can still adjust the PWM duty cycle through programming, just an info... we used 5kHz switching speed
- We measure the Bus...
Hi FvM, sorry for the confusion.
here is post #4 and #10 we combined it actually.
The transistor inputs are SQUARE WAVES. The H-bridge creates an AC voltage due to alternate switching of the transistors as we have programmed.
since u mentioned that there was something wrong w/ the circuit on...
Hi kabiru. this is our inverter circuit... not exactly but the concept of the H-Bridge and drivers are the same. what do you mean feed back loop?
https://obrazki.elektroda.pl/29_1303848654.gif
Ok, how would we increase our supply? Do you have any suggestion for a High Voltage supply circuit?
This is our current schematic.... we used this since it has no transformer
we saw something about "Voltage Doubler" Circuit. Is this circuit good enough?
Our H-bridge IGBT inverter with DC rail of 315V is working on an industrial fan with voltage of 230VAC across it.
now when we used the same circuit in running our refrigerator, given that the voltage across out inverter is 230VAC, the refrigerator wont start and started clicking. we think its...
oh ye i forgot about our schematic.
we used an H-Bridge configuration since our aim is to control the speed of the motor by changing the frequency of our inputs in the switch.
Our input in the IGBT are PWM.
Our Rail voltage is 220VDC and we convert it to AC through switching of the...
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