Just to clarify: Pulse Amplitude Modulation (PAM) changes the amplitude (height) of the pulses, while Pulse Width Modulation (PWM) changes the width of the pulses. I focused on explaining PAM, but many inverter Systems actually use PWM for motor control. Hope that clears it up!
I'm using this in my products. The reason is to reduce the heat produced by the rectifiers as you practically put diodes in parallel. Not recommended generally but in this case ok as the diodes are on the same piece of silicon and have closely matched forward voltage drops. Saves cost and space, works very well.
Thank you for your comment! Just to clarify, I didn't focus on SMPS in this video. The main topic was actually about the role of the two bridge rectifiers, which I explained clearly. If you could let me know the timestamp where you're referring to SMPS being discussed, I'd be happy to address it directly. Thanks again for your input
From the video: "the reason we use two rectifiers is to control the current which improves the power factor" Now, if anyone can find anything in the video that explains how that happens, please let me know. EDIT: Sorry, YT does not let me reply, but: So, there is actually nothing special about using two rectifiers. One rectifier with the correct current rating and heat sink, if necessary, would be just as good? Also, merely asserting that two rectifiers "play a role in power factor correction" without discussing how that happens is not helpful. Also, are you talking about the power factor of the DC output of the rectifiers? Interesting concept.
Double rectifiers are key in efficiently converting AC to DC and managing current flow. By working together, they split the incoming current, which reduces the load on individual components, preventing overheating and improving reliability. They also help create a smoother DC output by stabilizing the rectification process. Additionally, these rectifiers play a role in power factor correction (PFC), aligning the current with the voltage to improve energy efficiency and reduce power loss. This allows the system to run more efficiently, handle higher loads, and use less energy overall
The two bridges are wired in parallel to allow for a lower profile in tight spaces, while still handling large currents. The fet turns on for longer periods at lower portions of the curve, and for shorter periods near the peak. Thus utilizing most of the curve, instead of only the peak. It is raising this varying level, through an inductor, to a much higher voltage (400V), which is then reduced to levels below 30V by another circuit.
I don’t know if they’re completely in parallel, looks like only one rectifier was connected to the filter capacitor judging by those voltage measurements. But that also doesn’t match any PFC circuit I’ve ever seen.
Well, you might find it funny. But actually, it's not a transformer. You can call it a choke, reactor, or inductor. These are mostly used for removing harmonics from the current. I have already made a video on them.
He's right that it's not a transformer, I looked again, and it doesn't seem to have a secondary winding. Which would make it functionally a massive inductor coil. I have never seen one that big. Also, I have always thought it was kind of dumb to call a part different names based on how or where it is used. And I have never heard anyone call an inductor a "reactor" before.
I didn't understand anything from your explanation. The second bridge rectifier is used as a rectifier for the field effect transistor? The transistor controls the current in the first rectifier circuit? Is this part of the power corrector system?
@@forevertechenglish You are wrong about every bit you are talking about in this video. You've even managed to measure pulse in the wrong place of your hand at the bottom of your wrist instead of the top part. You couldn't find pulse in the place as you show in that video, it's impossible to do.
What I have told, I got and learned from an authentic source, I did some research and then explained this, until and unless I am not convinced I never make a video on that topic.
This is wrong information. The PSU shown are non PFC so no power factor control. In non PFC, current mostly flow not continuous but only around peak voltage curve that so current is high then use two bridge diodes will share current flow. There is no modulation, the frequency depends on the network
@@forevertechenglish, No dear,... you don't know and you don't explain, awful teacher...! Bridge rectifiers are "natural commutation devices", kindly explain what more than splitting the current provided by whatever is upstream do those devices do.... nothing! There is not way those devices would produce any "modulation"... You don't have a clue about the subject....!
Sorry but you explained nothing. No schematic, no overview which rectifier, capacitor, transistor or transformer is doing what. Just summing up some terms.
Just to clarify: Pulse Amplitude Modulation (PAM) changes the amplitude (height) of the pulses, while Pulse Width Modulation (PWM) changes the width of the pulses. I focused on explaining PAM, but many inverter Systems actually use PWM for motor control. Hope that clears it up!
I'm using this in my products. The reason is to reduce the heat produced by the rectifiers as you practically put diodes in parallel. Not recommended generally but in this case ok as the diodes are on the same piece of silicon and have closely matched forward voltage drops. Saves cost and space, works very well.
Misleading title , it explains smps, I was curious about this surprising use of twin bridge rectifyers, it does not explain this
Thank you for your comment! Just to clarify, I didn't focus on SMPS in this video. The main topic was actually about the role of the two bridge rectifiers, which I explained clearly. If you could let me know the timestamp where you're referring to SMPS being discussed, I'd be happy to address it directly. Thanks again for your input
Thanks for your comments, I saved a few minutes of my precious life.
Hum I would really like to see a circuit to understand what you are talking about.
He would really like to understand what he’s talking about as well. Perhaps you can explain it to him.
From the video: "the reason we use two rectifiers is to control the current which improves the power factor"
Now, if anyone can find anything in the video that explains how that happens, please let me know.
EDIT: Sorry, YT does not let me reply, but: So, there is actually nothing special about using two rectifiers. One rectifier with the correct current rating and heat sink, if necessary, would be just as good?
Also, merely asserting that two rectifiers "play a role in power factor correction" without discussing how that happens is not helpful. Also, are you talking about the power factor of the DC output of the rectifiers? Interesting concept.
Double rectifiers are key in efficiently converting AC to DC and managing current flow. By working together, they split the incoming current, which reduces the load on individual components, preventing overheating and improving reliability. They also help create a smoother DC output by stabilizing the rectification process. Additionally, these rectifiers play a role in power factor correction (PFC), aligning the current with the voltage to improve energy efficiency and reduce power loss. This allows the system to run more efficiently, handle higher loads, and use less energy overall
To answer the title , double the current
❤. Superb technobabble ! Yous an expert flannelologist fer shoore.. 😅😅😅
The two bridges are wired in parallel to allow for a lower profile in tight spaces, while still handling large currents.
The fet turns on for longer periods at lower portions of the curve, and for shorter periods near the peak. Thus utilizing most of the curve, instead of only the peak.
It is raising this varying level, through an inductor, to a much higher voltage (400V), which is then reduced to levels below 30V by another circuit.
I don’t know if they’re completely in parallel, looks like only one rectifier was connected to the filter capacitor judging by those voltage measurements. But that also doesn’t match any PFC circuit I’ve ever seen.
Wow! A transformer is now being called as a reactor!!😂😂
Well, you might find it funny. But actually, it's not a transformer. You can call it a choke, reactor, or inductor. These are mostly used for removing harmonics from the current. I have already made a video on them.
He's right that it's not a transformer, I looked again, and it doesn't seem to have a secondary winding. Which would make it functionally a massive inductor coil. I have never seen one that big. Also, I have always thought it was kind of dumb to call a part different names based on how or where it is used. And I have never heard anyone call an inductor a "reactor" before.
Love the technology.i saw this on DAIKIN mini split. Thanx for sharing teacher. Pleased to learn from you. Cheers from algeria😊👍🏻
Teşekkürler hocam. Emeğine sağlık.
I didn't understand anything from your explanation. The second bridge rectifier is used as a rectifier for the field effect transistor? The transistor controls the current in the first rectifier circuit? Is this part of the power corrector system?
Thanks nice work
Super tnx 😊
welcome
You have no clue.
About what?
@@forevertechenglish You are wrong about every bit you are talking about in this video. You've even managed to measure pulse in the wrong place of your hand at the bottom of your wrist instead of the top part. You couldn't find pulse in the place as you show in that video, it's impossible to do.
What I have told, I got and learned from an authentic source, I did some research and then explained this, until and unless I am not convinced I never make a video on that topic.
@@AAaa-wu3el As far as I understand, he didn't do a medical seminar!
Thanks for the video ❤❤❤
I think the first bridge is used as a rectifier, and the second as a modulator. A schematic diagram would show this.
is it possible to.run invarter compressor with ac power without mother bord ?
Do long videos... You are awesome
Dear amazing work but wish you showing us the difference between them by oslosicope if it's possible ☺️
Maybe in some other video boss.
THe "O" scope reveals the truth. The truth is a dangerous thing on RUclips.
Scope without "O" seems oscillo has no scope, lol 😂
same double bridges in parallel ,used in cooler master earlier 500W+ non pfc PC smps.
can you make a video about AC inverter compressor power supply and DC what is the difference

Nice
Thanks
Any part numbers?
Like, but really I don't understand. Is some thing new. Please in the next video make a diagram.
From kenya.... Cover washing machine pcb...
This is wrong information. The PSU shown are non PFC so no power factor control. In non PFC, current mostly flow not continuous but only around peak voltage curve that so current is high then use two bridge diodes will share current flow. There is no modulation, the frequency depends on the network
You didn’t show the diagram?
Which Diagram you mean?
@@forevertechenglishobviously you didn't draw schematic for PAM circuit you were supposed to explain.
Well what I told is the basic concept, well I will clear it all ofcourse in future videos with diagram.
thank you very much... great video.
No diagram?
You explained nothing because you don’t understand the subject matter. This was just useless hand waving.
Hummm ….. do you know what you are talking about????
I don’t think you do…..
i know becuase I got it from an authentic reference.
@@forevertechenglish, No dear,... you don't know and you don't explain, awful teacher...!
Bridge rectifiers are "natural commutation devices", kindly explain what more than splitting the current provided by whatever is upstream do those devices do.... nothing!
There is not way those devices would produce any "modulation"...
You don't have a clue about the subject....!
no you don’t… all you have said is BS…
All authentic crap…
Please don’t waste our time.
i am not, there is PAM involved when two rectifiers are used.
amplitude, not ampitude
🍺
Sorry but you explained nothing. No schematic, no overview which rectifier, capacitor, transistor or transformer is doing what. Just summing up some terms.
I will be doing that in future video.
Blah, blah noting new here but a big ego.
This is garbage. He knows nothing about electronics and is making up stuff that sounds reasonable - to him.
well if i show you the source to it, I know about electronics more than you think.