Question: Pure sine wave inverter.

[maxbarjr]

Re: Question: Pure sine wave inverter.

I believe it is more economical for them to use the jumper because all they have to do is look at the board to see if there is jumper is present or not present, if they use two different programs one for each frequency, then they will need some kind of marking that can easily identify which is which board, but if the marking comes off then they will not know which is which. That is why the other board uses jumpers.
But then again we will not know for sure.

https://www.badcaps.net/forum/attach...5&d=1489459256
I see the 0 Ohm resistors R12, R13, R14, R15 because why would you use 0 Ohms in place where it is not used to jump over the traces on the board, just a guess. You may want to look up the spec sheets of those ICs where the 0 Ohm resistors are connected to those pins to see what they are. Otherwise I have no idea unless you can get a hand on 60Hz board version.

Wow, I have not noticed those 0 ohms resistors there. Good point. I will leave it from there for now. I will check that up next time.

Thank you budm for your inputs. Really appreciate it.

[budm]

Re: Question: Pure sine wave inverter.

I believe it is more economical for them to use the jumper because all they have to do is look at the board to see if there is jumper is present or not present, if they use two different programs one for each frequency, then they will need some kind of marking that can easily identify which is which board, but if the marking comes off then they will not know which is which. That is why the other board uses jumpers.
But then again we will not know for sure.

https://www.badcaps.net/forum/attach...5&d=1489459256
I see the 0 Ohm resistors R12, R13, R14, R15 because why would you use 0 Ohms in place where it is not used to jump over the traces on the board, just a guess. You may want to look up the spec sheets of those ICs where the 0 Ohm resistors are connected to those pins to see what they are. Otherwise I have no idea unless you can get a hand on 60Hz board version.

[maxbarjr]

Re: Question: Pure sine wave inverter.

I have to remove the board to be able to get a better view of the front and back. So here is is. I don't see any pads that you can short or open to change any functionality. What I think is since this is a PIC, could it be in the program that tells which frequency (50 or 60) it should work?

I am new to microcontrollers so I can't say much what I am seeing.

Thanks.

[maxbarjr]

Re: Question: Pure sine wave inverter.

https://www.badcaps.net/forum/attach...1&d=1487674217

Can you show back side of this PWM controller board?
Your board has similar to the board EGS002 that is used a lot in DC-AC inverter. If you search for EGS002 you will see lots of info.
Your board may have a jumper to set 50/60Hz.

Hi budm. Thank you for those attachments. This is interesting. I am out of town now. I will take a picture of the backside of the board when I get home by next week. I will also check if there is a similarity on the schematic you send and the board pwm board on the inverter.

I have electronics background and been repairing boards up to component level. I can draw schematics.

Again, thank you.

[budm]

Re: Question: Pure sine wave inverter.

where in the world uses 60hz at 220v ?

http://www.controlledpwr.com/help-in...l-voltages.php
http://philfaqs.com/input-ac-100v-240v-10a-50-60-hz/

Philippine
Japan (200V), 50Hz, 60Hz depends on if you in the northern or southern of Japan.

[petehall347]

Re: Question: Pure sine wave inverter.

where in the world uses 60hz at 220v ?

[budm]

Re: Question: Pure sine wave inverter.

His board uses PIC but I am sure it is the same concept, so he may have look and see if there are jumper pads to set the frequency or not.

[keeney123]

Re: Question: Pure sine wave inverter.

Eg8010 spec.

Cool information. Is this what maxbarjr has?

[budm]

Re: Question: Pure sine wave inverter.

Eg8010 spec.

[budm]

Re: Question: Pure sine wave inverter.

https://www.badcaps.net/forum/attach...1&d=1487674217

Can you show back side of this PWM controller board?
Your board has similar to the board EGS002 that is used a lot in DC-AC inverter. If you search for EGS002 you will see lots of info.
Your board may have a jumper to set 50/60Hz.

[keeney123]

Re: Question: Pure sine wave inverter.

Actually I called them today and asked for their tech suppport and I was right. I was told that because I did not purchase the unit from them, they can not be of any assistance. They don't sell service manuals either. About the 50/60hz as advertised, I was told that either I have to buy the 50 or the 60hz unit. There are no switches inside the unit to change that.

Perhaps I just have to buy another inverter with 60Hz pure sine wave. I am willing to reverse engineer it if someone can tell me how.

Thanks.

Well maybe you could sue them for false advertising. If you buy a 60HZ one then just don't buy from them. If fact if you are going to buy a new one I would first connect the one you have up to 60 HZ circuity and see what happens. Just don't connected to something you are not willing to lose. It may have some type on sensor the compensates for the different frequency. No don't do the above it just causes me to get mad they will not help you with their product.

[budm]

Re: Question: Pure sine wave inverter.

"I am willing to reverse engineer it if someone can tell me how." Telling you How? Well, how much do you know about the electronics down the schematic and component level. Can you draw schematic?. It will require you to block out each section of board to find out what their function are (for example, it will have power supply section, and in that power supply section it may have some switching supplies, regulator. Another section may have some kind of Oscillator, the drive circuit, the output circuits, etc.). From the look of the unit, this inverter may be using PWM inverter topology. You will have to completely remove the boards from the chassis and look up the spec sheet of the ICs to find out what they are, that is the start.

Read this





http://digitalcommons.calpoly.edu/cg...0&context=eesp

https://cdn.badcaps-static.com/pdfs/...cdd82343e5.pdf

Do the search for 'ac inverter using modulated PWM'

So much to learn.
You may want to get a small circuit board that you know what it is and what it is used for then you can trace out the board and draw the circuit and see how much work that will be.

[maxbarjr]

Re: Question: Pure sine wave inverter.

Actually I called them today and asked for their tech suppport and I was right. I was told that because I did not purchase the unit from them, they can not be of any assistance. They don't sell service manuals either. About the 50/60hz as advertised, I was told that either I have to buy the 50 or the 60hz unit. There are no switches inside the unit to change that.

Perhaps I just have to buy another inverter with 60Hz pure sine wave. I am willing to reverse engineer it if someone can tell me how.

Thanks.

[budm]

Re: Question: Pure sine wave inverter.

Yep, just call them and tell them that their spec sheet does shows 50/60Hz.
It will take reverse engineering to figure out the circuits to modify the unit.

[keeney123]

Re: Question: Pure sine wave inverter.

Update: I got no reply from that solar system company despite numerous follow up emails. I am guessing they will never reply since I did not buy this unit from them. That makes sense anyway.

So back to zero. I am still hoping some power inverter experts out there can tell me how to convert this 50Hz power inverter to 60Hz.

Call them.

[maxbarjr]

Re: Question: Pure sine wave inverter.

Update: I got no reply from that solar system company despite numerous follow up emails. I am guessing they will never reply since I did not buy this unit from them. That makes sense anyway.

So back to zero. I am still hoping some power inverter experts out there can tell me how to convert this 50Hz power inverter to 60Hz.

[maxbarjr]

Re: Question: Pure sine wave inverter.

Did you contact the place where you buy the unit from?
That SOLARSYSTEM is in your country so why not contacting them? is it that hard for you to contact them to find out?

Solar Systems Philippines Inc. Cebu
Ground Floor Unit 3, Sugbutel Building
S. Osmena Blvd., Corner Road East
North Reclamation Area (Near SM)
Cebu City, Philippines 6000
PLDT: +63 (032) 2600329
Smart: +63 0949 6812 951
Sun: +63 0933 520 1230
Globe: +63 0927 590 7772
Mobile No.: +63 0917 705 1149
Skype: Solar Systems Philippines
Email: sales@solarsystemsphilippines.com
Website: www.solarsystemsphilippines.com

Actually I did drop them an email last night and hoping I get a reply today. I bought this from a garage sale, used but working.
Thanks.

[budm]

Re: Question: Pure sine wave inverter.

Did you contact the place where you buy the unit from?
That SOLARSYSTEM is in your country so why not contacting them? is it that hard for you to contact them to find out?

Solar Systems Philippines Inc. Cebu
Ground Floor Unit 3, Sugbutel Building
S. Osmena Blvd., Corner Road East
North Reclamation Area (Near SM)
Cebu City, Philippines 6000
PLDT: +63 (032) 2600329
Smart: +63 0949 6812 951
Sun: +63 0933 520 1230
Globe: +63 0927 590 7772
Mobile No.: +63 0917 705 1149
Skype: Solar Systems Philippines
Email: sales@solarsystemsphilippines.com
Website: www.solarsystemsphilippines.com

[maxbarjr]

Re: Question: Pure sine wave inverter.

Thanks guys for the reply and for providing the manual. Unfortunately, there are no switches or jumpers in the main board that says 50hz or 60hz. Outside the main chassis, there is a sticker that says, the input, output, frequency, and whether it is modified or pure sine wave. And there are ticks on 12VDC, 220VAC, 50Hz, and pure respectively.

Hope someone will come up to say that this can be modified to 60Hz.

[budm]

Re: Question: Pure sine wave inverter.

It shows as 50/60Hz, so look at the user manual.