Aw poo, now I just gotta know how sine my EATON UPS really is too, they really should be forced to include waveforms for all inverter equipment in the manuals / documentation. It would be sweet to know if you got that pure sine or pure sin wave inverter! Seems good a reason as any to actually buy a scope tho right, right?!

@arduinoversusevil2025

5 жыл бұрын

Absolutely critical to check it with a scope. No choice.

@tactical1013

5 жыл бұрын

Pretty sure all the cheaper ups will be step waves. They say it in the spec sheets, eaton and apc.

@gddeen1

5 жыл бұрын

Power should not be thought about except for the that are clinically compulsive, rich, brilliant and willing to spend their lives getting mostly nothing accomplished.

@DonziGT230

5 жыл бұрын

Plug a desk lamp into it. If it sounds buzzy it a square or modified wave, if it sounds normal it's probably a pure/true wave. What AvE said about it being impossible to create a proper wave with an inverter is incorrect, my MicroSolar puts out a very clean wave.

@taith2

4 жыл бұрын

Speaker and 12k ohm 1w resistor would tell you, just don't plug it for too long, 5w speaker minimum. You can clearly distinguish square wave triangle and sine wave. There are apps on phone that can generate these sounds for comparison.

The transistor will always blow to protect the fast-acting fuse.... an EE motto...

@lesliefranklin1870

5 жыл бұрын

Gotta protect those fuses. They are expensive and hard to replace. (sarcasm)

@Gameboygenius

5 жыл бұрын

I hear from a certain Louis Rossmann that Apple are especially keen on implementing this motto in their backlight circuits.

@RobertSzasz

5 жыл бұрын

@@pulesjet well, you want it to pop without blowing up in your hand, making sure it's not chineseium crap drives the cost up.

@trevordavis464

5 жыл бұрын

@@pulesjet what gauge aluminum foil is 200mA?

SINE WAVES - now with sharp, modern edges

@AlfOfAllTrades

5 жыл бұрын

Much in the same way as a DeLorean... all angles and shit.

@konorkoler

5 жыл бұрын

They're just scared of Apple's legal team.

@syx3s

5 жыл бұрын

really though, the average is damn near perfect.

A hunting joke, you say? Okay: An old man was at his doctor getting a checkup. The doc asked him, "So, how you doing, pops?" The geezer smiled and replied, "I'm 92 years old. I've never felt better! Six months ago, I married a smoking hot 30-year-old blonde, and guess what? She's pregnant with our son, who will arrive in two months! What do you think about THEM apples?" The doctor thought for a moment, and said, "That reminds me of a really great story. I have a pal who loves hunting. He loves it so much that it's an obsession for him. So much so that this fall on opening day, he was so excited to go hunting that instead of grabbing his rifle on the way out the door, he grabbed his umbrella. Well, he was quietly approaching a small creek, and not 10 yards in front of him he saw the biggest, fattest beaver he had ever seen. It had to be some kind of record! So he raised up his umbrella, took dead aim, and...BANG! The beaver fell dead where he was standing." "Wait one second," said the old man, shaking his fist, "somebody ELSE must've shot that beaver." The doctor nodded and replied, "exactly."

@minutemarvels247

5 жыл бұрын

Good one!

@thedevilinthecircuit1414

5 жыл бұрын

It's a true story, I swear!

@slateslavens

5 жыл бұрын

Today on Mutual of Omaha's Wild Kingdom, we hunt the elusive urban beaver....

@theworldaccordingtome6448

5 жыл бұрын

What, the doc never heard of pre-marital sex?

@roberthorwat6747

5 жыл бұрын

Chortle!

After watching this channel for maybe a year I was really lost in a lot of this electrical stuff. Still really interested in content though because of curiosity. It’s all coming together now, 3 weeks into HVAC-R tech. degree and intro to electrical theory. AMAZING revelation. Trying to edify AVE here in the impact this channel has and will continue to impact my trade education. First time chiming in here but just wanted to say thx. Been mooching long enough and obligated to contribute to patron. Thx Again AVE

@arduinoversusevil2025

5 жыл бұрын

Thanks for sharing a chuckle in the shop with us.

Nodding knowingly all during the sermon. Walks away with the group. Tim - "Bob, you understand any o'that?" Bob - "Not a damn thing, Tim. Wanna nother beer, eh?"

I'm just happy for the new cutting mat and all of the future healing miracles she will perform

The KZread gods are good to me today. They let me know your video is out!

@TheMdwfg

5 жыл бұрын

Remonetized

In this case, "modified sine wave output" must be the new marketing word for square wave output.

@SomeMorganSomewhere

5 жыл бұрын

"Modified sine wave" is complete marketing BS, "Modified SQUARE wave" is the correct terminology, but marketing heard that "sine wave is better" so they changed it to "modified sine wave"...

@viermidebutura

5 жыл бұрын

@@SomeMorganSomewhere is not even modified square wave is just a plain old square wave with some dead time

@user-fs3dg1po2z

5 жыл бұрын

It is the marketing word for square wave output but its not new. They've been using it for 15 years at least

@AlexZanderMuro

5 жыл бұрын

more expensive inverters/rectifiers have a lot better filtering and PWM to get much much closer to a legit sine wave. Used to work on big (like multi MW) UPS systems and DC plants, and once you start spending the big bucks you get really accurate power reproduction. thats why they get to keep the name sadly

@ethanpoole3443

5 жыл бұрын

viermidebutura The dead time is what makes modified sine wave “modified”. The reason for the dead time is to avoid the extreme transition, and momentary near short, of a true simple square wave drive plus it creates an actual zero crossover reference period. Modified sine wave is much, much, gentler on inductive loads, such as motors and transformers, than the even simpler pure square wave of much older early AC inverters as it the magnetic field to collapse more gracefully before the polarity transition occurs which allows those loads to both run much cooler and generate fewer harmonics versus simple square wave. That said, I think we would all likely agree that it really should be marketed as “MODIFIED SQUARE wave” but then that would be bad marketing wank since consumers have learned to look for the words “sine wave” if they wanted a “better” inverter - its like calling a battery “marine deep cycle” even though the battery is most certainly not deep cycle but uneducated consumers trust that a battery that says “deep cycle” must be deep cycle. Many modern inverters of this type will also vary the output duty cycle to help soft-start heavier loads, like motors, that would often overload the earlier square wave AC inverters. Had this been a real “pure sine wave” AC inverter the output would have been Pulse Width Modulated at a much higher frequency (somewhere in the range of 20-100KHz) that would then be smoothed by a low-pass filter to form a proper sine wave output (essentially they operate as a Class D amplifier).

How can you not love these videos, love from Italy.

Love your videos where you teach how electronics work and troubleshooting. Very valuable as a robot/automation technician.

I love your video's and the way you explain this stuff. I try and come here daily for some stress relief! Thank you, and please do not stop doing this.

I've been looking at and was just about to buy one of these inverters. Thanks for the review.

Im not surprised that the waveform looked like that. The inverter you tested doesnt claim to be a pure sine inverter. Its working exactly as advertised.

"A diode is a one-way check valve for angry pixies" - I'd buy that t-shirt!

With all the capacitors I was briefly expecting an Electroboom moment at a time or two, but it seems AVE's fingers are much better at keeping away.

The new diggs needs a name. Area 52, skankworx...

@WhiskyCardinalWes

5 жыл бұрын

Beaver Lair

@robertlee9395

5 жыл бұрын

Area Cunuckistan, eh? Christen it with some Old Swillwaukae.

@popo66us

5 жыл бұрын

Uncle touchy's basement

@jamestheotherone742

5 жыл бұрын

"On The Job When The Boss An't watchin'"

@textbookdave5337

5 жыл бұрын

Bumblefuck's Bottega

I used to work on 400Hz converters when I was in the navy. They make nice clean sinusoidal waves. Kind of neat seeing it broken down in to a smaller scale.

Difference between deer nuts & beer nuts? Deer nuts are always under a buck.

I happen to be working at a company that sells and repairs UPS units (big ones, up to 500 kVA), so I have seen an inverter or two over the past few years. That poor thing on your healing bench is a joke from the technical point of view. The only admirable thing about it would be how the design was cost-optimized to death when it actually still works without setting everyone you love on fire, but that's about it. The machines we work with acutally do generate perfectly clean sine wave (regardless of the brand, it's a trait of the class). They usually have a very beefy brainboxes, utilizing FPGAs for precise MOSFET/IGBT control and use very high frequency PWM to "draw" a hi-res approximation of the sine wave, which is then fed through an output low-pass filter to iron out the noise and distortion with as little power loss as possible. Some devices can go under 1% output THD with linear load and under 3% with non-linear load, which is usually way better than the input power from the grid. The cost, of course, is a different story. My point is that you actually can generate a clean sine wave using solid-state switching converter although a lot of engineering needs to be involved.

@cbecht

5 жыл бұрын

"fed through an output low-pass filter" Yeah, when he was talking about a perfect sine wave being impossible from switching, I was thinking about output filters and Nyquist's theorem and such.

Taking a guess at the architecture, the first stage looks to be a push-pull step up convertor, with a passive output rectifier (all those diodes) to generate an DC link at 170Vdc, from 12v to 170 is about a 14x step up, which looks about the winding ratio on the primary inductor. Then that DC link is sent through a basic 120Hz 3 step output (ON - OFF - ON (reversed polarity) to generate a square wave output. When you switch on the grinder you can see it increase the ontime to attempt to keep the RMS voltage at the setpoint (120V), which of course further distorts the waveform into something like looks more like 2 steps. 2kW is 16.6A at 120V, so the output stage, which only switches slowly (and therefore has little switching losses) is fairly small. The input stage of course, down at 12Vdc, needs to pull 166Amps (plus loses) so is a lot more beefy. Even with 8 fets, that's still over 20A per Fet. Because of the high current, they use N channel Fets to get a sufficiently low RDSon, and therefore have to use an isolated source referenced gate driver to create suitable gate voltages (probably at around 24V (12Vsupply + 12V gate)

Thank you!! I've been dying to see something like this. I'm an OTR trucker and I rely on a 1500w inverter to power stuff like a skillet, 700w microwave, grooming stuff, laptop, etc. And I won't lie, it's a piece of chit!

One of your best. You were really on your game today. Thank you.

That's a modified sine wave inverter, if they are pure sine they usually either have it written and/or have a sine wave symbol on the case. Would be nice to see you examine a pure sine wave type.

what is this new empire of dirt?

@AtomSmasher5

5 жыл бұрын

Aaron Anderson or lack there of

@mkiser711

5 жыл бұрын

Yep. Wheres the mess? I think he's knolling. What's the story AVE?

@221test

5 жыл бұрын

I suspect it is the same location he filmed the forkin' lift videos in?

@xbris117

5 жыл бұрын

Looking more like the empire of clean. Way too clean, doesn’t look worked in.

@bkbroiler6609

5 жыл бұрын

I’m offended by the cleanliness

Definitely not a "true sine" inverter. Did you mean to say it that way at the start of the video? True sine inverters exist (I have several) and they put out a beautiful sine wave. Cleaner than the utility mains by far.

@fredlaroche6969

5 жыл бұрын

Indeed, same here. I have a pure sine for my stereo and sensitive electronics. It's clean as frig

Love when you do electrical stuff. I'm an I/E tech, and even though I'm mainly Instrument I started as a pure electrician and love the electrical theory.

Congrats on the new spot.

Really glad your covering this topic .... I’m about to put power in my truck ,, need to run electric Jetter and sewer machine lights etc... at same time

Any tips on picking up a used scope? Or did you buy that new? I need one for my ham radio ventures.

@michaelmolter6180

5 жыл бұрын

I was going to buy a scope, and then got a USB all-in-one scope/power supply/waveform generator called an Analog Discovery II. It has been the greatest thing I've ever bought for electronics hobby work. Would recommend. Unfortunately, the 25 MHz bandwidth is probably to slow for a lot of radio frequency work (I don't know anything about HAM specifically).

I salvaged the controller out of an old California Instruments "Invertron" that got scrapped at the electric motor manufacturer where I used to work. Interesting little thing. It had an 8 bit ROM chip that could code up to 256 levels of output, and they coded a quarter sine wave into it. A four stage counter would step output modes every time the address in the ROM hit either 11111111 or 00000000. When it hit all ones, it would reverse the address counter and count back down from 11111111 to 00000000. When it hit all zeros, it would again, reverse the address counter, but also toggle the output polarity. This gave a 512 level digital sine wave that completed one cycle in 1024 total steps. Not too shabby for a bit of kit from 1980!

Jackson Pollock interpretive dance. You are a poet, AvE

Perfect timing. Just about to troubleshoot a "pure sign wave" inverter.

who gave you authorization to film in the Jr College cafeteria?

Did that reverse polarity thing to my 2000W inverter....Blew every one of those fuses....Replaced them and it's all good !

Hey!!!!! No more echo echo echo! Well done Canadian hands of mystery.

I've been using one of these damn things in the woods for years, glad you now know what's makes it tick...or whine I guess I should say.

almost to a million subs AVE!!!!!!

Almost a million subs, holy shit. I've been here since about 200-250k. KZread unsubscribed me automatically(I don't know why) but I knew it right away. I'm surprised this channel is still here.

What a great day to leave work a little early, didn't even know Uncle B had a new vijayo - but damn if that's not the first thing I'm doing with this time!

P-channel mosfets work well as reverse polarity protection on low power low voltage circuits when you don't want the voltage drop of a diode.

Finally! Someone has locked AVE in a hollow room with nothing to do but make videos!!! Keep em coming!

That vitamix as a smoothificator was a stroke of genius.

Connecting vehicle mounted inverters I use a test light in series to one input lead to bring it up to 12v slowly through the test light to avoid the lightning arc on the terminal. Conversely when disconnecting I use it across the input leads to discharge the thing to avoid the 12v leads arcing if they touch while removing it.

Where did you get such an impressive skill set? This guy is very smart. I personally am a millennial and let me just say true Technicians and mechanics are a thing of the past and this guy is one of the last of a dying breed. Cheers buddy here’s to you!

Awesome I am excited to watch this after work I took apart a converter from an rv a little while ago there's some interesting circuitry in those thing too if your intrested in doing a tare down of one let me known I have piles of them

you are one of the best Canadians out there my brother. I wish I knew about electronics like you do , eh.

I'll send you the wave form I get out of my Trace 2548 inverter, its impressive how many steps there are in a wave. Of course you pay out the nose for that, but I was running a lot of computers of it in the late 90's with a train battery. Wish they were in business and still made. My first one was a 2512, but the 00 battery cables would dance under load, I could calculate somewhere in the neighborhood of 400A pulsed DC draw. Like watching tassels spinning at the titty bar and almost as fun.

@newdeathscope

5 жыл бұрын

Why did you do that, and do you have any pictures for us to gander at?

@fuzzy1dk

5 жыл бұрын

the duty cycle is important because when it is just right it removes many of the harmonics

@chasingcapsaicin

5 жыл бұрын

@@newdeathscope server farm, and I may be able to find pictures, this was ~97 I set it up. Full flege ISP with national DSL service completely independent backhaual.

@chasingcapsaicin

5 жыл бұрын

I'm sure he will with something he has round there, I would put it to the lighting first. I would not want to run a fridge compressor off that wave.

@aguyinback

5 жыл бұрын

I think you need to be going to a different class of establishment...

That kind of waveform will kill AC induction motors such as found in refrigerators, electric fans and such, they will dissipate much more power as heat due to the high harmonic content. Powertools generally don't mind because they have a universal motor (which is actually a DC motor which also doesn't mind running on AC) but will run a little hotter because of the eddy currents induced by the high frequency components of the wave. In most electronic devices the input filter capacitor gets ruined rather quickly as it cannot handle the sharp rising edges of the boxy 'sinewave'. The device will still work but it will leak noise into the mains supply and will also become more vulnerable to switching spikes in the mains supply which could cause unexpected resets, data corruption and stuff like that. Devices that use a capacitive divider will probably die after a few minutes but I've never tried that. I mean things like plug in digital timers, remote controlled socket outlets and such. Good quality inverters do exist that actually produce clean sinewave outputs which are visually indistinguishable from what you get out of a power outlet. They work pretty much like class D audio amplifiers changing the duty cycle of a very high frequency inverter making the output voltage follow an exact sinewave once the high frequency is filtered out by an LC filter in the output stage. Such inverters are common in the better computer UPSs as well. They usually cost about five to ten times as much as the ordinary ones. They are more expensive because they need to run at a much higher PWM frequency, typically somewhere between 150 and 500kHz as opposed to around 5 to 10kHz probably being used in the inverter you got. The cost is mostly in the MOSFETs and the freewheeling diodes.

@spikester

5 жыл бұрын

Many large inverters invert the raw DC bus voltage of rectified mains using hundreds of tiny steps with little to no filtering required, the tried and tested method of most massive online based UPS's in large datacenters to generate 3 phase AC with a string of SLA batteries and very large IGBT's.

@DerpyMail

5 жыл бұрын

Maybe in some, but not all

Many years back I did one of these of my own design. It got very close to a sine wave and was quite efficient. The primary side is fairly simple because it just made nearly a square wave on the transformer windings are 100KHz. The secondary side was where the bulk of the magic lived. Basically: If the MOSFETs on the output were in step with the ones on the input you got +170V If the MOSFETs on the output were out by 180 degrees you got -170V out At 90 degrees the output was 0V almost exactly. Some electronics wobbled the phase at a 60Hz rate.

That's a modified sine wave inverter you can get pure sine wave inverters that do show a proper sine wave on the scope, I have one and the power output is very clean.

Sounds like the new shop again. You cant fool me with the green matt.

Looks to me like you were right about the output power stage - it is an H-Bridge. The input side is a push pull configuration (note that one end of the windings are connected to batt +)

I love your channel. I would love to see a Gas generator BOLTR.

MOSFETs will typically fail into a closed circuit state and then send power out the gate which the lower voltage electronics love. IGBTs which are common in other inverters/converters like VFDs will normally fail open but have much higher losses when used in low voltage applications.

So this is the same just reverse wise on the Dyson suck machine, didn't it go from ac to DC to ac again. Or am I not awake yet its early.

I get the 2 banks with fans and black wires through the toroid as pulsing the DC to get AC on the thinner wire on the toroid. However, what does the third fan and FETS do on that 3rd aluminum block?

I learn something everytime, thanks Axe!

@johnpossum556

5 жыл бұрын

Arduino Xeroxes Evil?

Your videos are one of the few reasons I’m sticking with the nuclear engineering path I want to pursue. My math skills are gettin steadily better. Hopefully I’ll be doing calculus fluently in a year or two.

When you were on the boat you used the blender to get the coffee maker to work. Once the coffee maker turned on could you then turn off the blender as the impedence from the coffee machine could provide the same impedence?

LOVE THIS GUY AND THE PIXIES AND SMELLASCOPE.

You made my day, loved the gag reel

Unbelievable Ave, its like you read my mind or something. I had what i thought was a good inverter, but hadn't tried it yet. And the other day i had it hooked to just a dam fan , and as you would say she let the smoke(not a pleasant smell) out after about an hour. So i disassembled, and im sittin here and your doin surgury on a very similar one. Mine had 4 or 5 blown mosfets, but i wanted to fix it. So that was very helpful. Kudos I wonder if the mosfets were all the damage though? If thats it (I HAVE THE POWER!) And a new desolering gun,will travel. Lol

Very instructive video by an electronic technician with experience . These power inverters just produce modified sinewaves.

I’ve been repairing stuff like this for over 3 years and this did make me giggle, from a drunken glance, that was modified sine wave and the general rule of thumb is if you’re using an inductive load (heaters, microwaves ect) your load will be double what it’s rated. ^^ SINGLE SIDE PCB’S MAKE ME CRY

Reminds me of 6 step output of older industrial VFD's before everyone started using PWM. Older drives were much easier on bearings than the new pwm output but components had to be much larger.

ha I just posted on engineering connections video that they would do this, thanks AvE!

Test the current-voltage phase difference with inductive vs resistive vs capacitive loads? Do VFDs have better output filtration that that thing?

mosfets fail open?? I rarely see that in the amplifiers I repair... unless by open, you mean they open after they sit shorted and get hot enough to blow apart?

that brand new cutting mat is asking for some workbench metal furnace action.

If my guess is right, those diodes are paired with those capacitors to create multiple voltage multipliers. Earlier this year I was looking at a 240V VFD and wondering if I could use a simple Diode Based Voltage Doubler out of a Bridge rectifier to power it from my 120V Outlet.

was the grinder under a load when you were scoping it on the meter?

is that a Tianhe-3 supercomputer powered oscilloscope? The UltraVision model? I was looking at that tag, and I couldn't figure it out... lol

Judging by the echoes, it sounds like you got a new shop there

Could also be using increased drive voltage for the Mosfets so it can use n-channel FETs as high side switches.

@brainndamage

5 жыл бұрын

The cost of n-channel mosfets with high-side drivers is likely lower than that of p-channel mosfets with the same ratings

@allmycircuits8850

5 жыл бұрын

They use bootstrap circuits for that: very cheap and effective. Capacitor is charged to some 12 volts when lower switch is on. Then capacitor is commutated between source and gate of high-side mosfet, so it turns on. Voltages on both plates of capacitors rise quickly up to rail voltage, but it's no problem. Voltage across is still the same.

The input configuration is a push-pull. A transformer coupled push-pull to be precise. The current goes through the bank of fuses to the two sets of thick black wires soldered into to the board. From there it goes through the torrid once in either the left or right direction depending on which set of four MOSFETs is on. Finally, it returns to ground. Do a google search for ‘push pull inverter’ for lots of examples. The output might be an H bridge. Love the 'sign wave'

Do you have a recommended inverter that is robust, but wont break the bank and has a clean output? Im wanting to install one that could handle a small pancake compressor in the truck, or handle a skill saw and such connected to it.

I was ready to walk when I saw paralleled fuses and diode - probably unmatched to boot. At full load that's 220+ amps draw on the battery at 90% efficiency. I hadn't thought of the pulse effects on the batteries - thanks! This would need an output 1:1 20 amp transformer to get a fairly clean regulated output.

New to angry pixy wrangling... can you show what noise is/ explain? Also since the waves are not smooth flowing is that hard on tools etc?

When i had that inverter, the jeeseless thing only put out about 90vac. It got returned and i got a pair of inverters that make 105vac instead. Never regretted that decision.

Boom says Hi....All that smoketalk in the beginning,Congratulations On Freeing up Refa Canada!,,Great teacher for sure.Electronics has been weak for me,You bring into perspective very well.73s

Can you show on the oscilloscope the smoothing action of an inductive load? Thanks

@mikewhitaker4150

5 жыл бұрын

This a great idea, how about it AvE?

@NiHaoMike64

5 жыл бұрын

That would require a current probe for the scope, which isn't exactly cheap.

@IrishSkruffles

5 жыл бұрын

+NiHaoMike Nah he could use a shunt resistor

@Conservator.

5 жыл бұрын

NiHaoMike why wouldn’t measuring the output voltage work? Just measure the same but with the vitamix at full speed. See what happens to the “wave”.

If you put this modified square wave thru a isolating transformer(120v-120v) is the output of the transformer any better? is the least power waste (blender vs magnetization current of the transformer) considering running for long time of battery.

The interesting thing is that, these kind of inverters already have a stable high voltage power supply, and usually a driver bridge at the end that generates the fake sine wave similar to class D amplifiers driving bridge. If they have added a relatively low frequency PWM generator driving the bridge at lets say 5kHz, and added a simple low-pass filter made from a single coil and capacitor to filter out the driving frequency they could produce almost perfect low frequency sine waves (50-60Hz) with very high efficiency. It is just not needed in the most cases. But if it was needed, it could be made for a little more price.

@dannooo548

5 жыл бұрын

You would probably run into some difficulty with mosfet charging wasting some power. Or other capacitance in the circuit.

@resetcoder

5 жыл бұрын

What do you mean? Class D amplifiers work exactly the same as this inverter, it is just switching the mosfets on/off, thats the most efficient way to reduce power dissipation, therfore minimizing power loss. The only difference is, you dont just simply turn them on/off in a square waveform, but you modulate the width of the squares, to create sine. Btw if you use igbt mosfets for switching at the end (and you can, since the voltage isn't extremely high and the frequency is low) you can increase the efficiency even more. Especially if you make ZVS switching for the power supply area.

@edwardturpin6544

5 жыл бұрын

I've built a class D, and I believe the coil cost me around 5 bucks. Which is really expensive for these kinds of electronics, which is probably why they didn't bother. Lot of copper needed for high current.

I have a question? When can I finally pull it out of the vice? It's starting to hurt.

@mortlet5180

5 жыл бұрын

If you can feel it you don't have the vice on there tight enough. Put a wrench on her and give it a few tappy-tap-taps until the pain goes away.

@dattepo7534

5 жыл бұрын

He did say keep it in the vise

@Conservator.

5 жыл бұрын

Just listen carefully to the next video’s ending. There’s always hope.

@jaredanthony8070

5 жыл бұрын

@@mortlet5180 cheater bar. Aka handle off the floor jack 😂

Is that power supply a Rigol DP712? I have one of those. Really good power supply.

If you happen to get hold of one of those dewalt 1800 inverters it would be great to see it on the scope. It will run my 110v mig welder but the welder definatly sounds different. Thanks for the video!

i just did the goof he talked about with our 750w inverter it got the 4-25a fuses. soldered a wire to test and it fired back up so i guess i will pick up some 25a fuses and resolder them in

In my experience disassembling stuff factories usually use N-Channel Mosfets for Half or Full H-Bridges along a floating gate driver to save in costs as N-Channel mosfets cost much less for the same current capability than P Channel ones so the driver will have a charge pump dc-dc to boost it to say 36V and so you can drive the lower mosfet with 12V and the upper one with 24 or something like that so that the lower one has 12-0=12V between the gate and source and the upper one has 24-12=12V between its gate and source. :P

Nice one review, I would love for you to do a review on an APC inverter in a UPS, pretty cheap even for the good models, but they claim to be much better and given that they are battery and inverter in one, much easier to test.

The input power stage probably has a common positive on one side of the transformer, and two giant windings that lead to the fets. The sets of mosfets pull one or the other winding down to ground. The output stage is an H-bridge.

Interesting. I wonder how the higher end "pure sine" inverters compare?

Mosfets dont always fail open. Had one zapped by a close lightning strike recently that wouldn't turn off :o !

I have a question for people who might know more about electronics. I have a similar inverter installed in my work van, for operating a microwave. I've considered adding a second (deep cycle) battery in parallel to reduce the current draw from the vehicle's alternator. Are there any foreseeable risks or downsides to this? Also will this be effective as I intend?

I have these 2 "tools" that you fit to your drill and their only purpose is to sort of chamfer a bolt/threaded rod that has been cut so that you can easily start a nut. Would you have any use for them? I've never used them and doubt I ever will. I'm pretty sure it was an impulse buy after seeing them on Kickstarter....

This video taught me a lot about inverters! I have one in my work van, I am a small engine mechanic. Every time I hook a snow blower electric starter to it thing fucking spits some charger then stalls, try again spits a little and stalls. Turned off my pancake compressor and she chooched just fine. Quality product size of a bowling ball, made of aluminum, but I guess she has her limitations.

To get a clean ac sine waveform you just add in a notch filter after the resonant circuit and before the amplifier that bumps it to 120 v.

My old man is his retired boredom decided to rewire the house with a bank of car batteries running through a 'sine' wave inverter. Despite the advice of two energy enginerds to use proper switching, or better yet, to do something actually useful, he didn't isolate the inverter properly and put the 240v mains voltage into the 24v DC input. It had 24 of those car fuses, 12 were blown, and all of its huge capacitors were ruptured. I was informed that he was sure it would be easy for me to fix it :)

What about some acoustic panels for the workshop? That would be an interesting experiment/video trying to make those.

What happens if you connect there something like an "asyinchronus motor pump" or whatever would have an "asynchronus motor"?