NO SCRIPT, NO FEAR, ALL OPINION An off-the-cuff Video Blog about Electronics Engineering, for engineers, hobbyists, enthusiasts, hackers and Makers Hosted by Dave Jones from Sydney Australia
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Wow, as an engineering student, I would have learned useful stuff in circuits if you had been the professor. You incorporate the theory into the practical with great visuals, demonstrations, and clear explanations. Thank you!!! This should be a tutorial on how to make a teaching video!
How long do you reckon it would take to design the circuity for one of these from scratch, maybe including test circuits too? I'm just getting into the EE field and don't know how to properly gauge the time it takes to design a large circuit, let alone these monster circuits.
20:13 in that clip first i noticed why his probe is not compensated properly ? is he don't know how to compensate probe ? those fake people are very entertaining.
I’d like to see the waveforms during different modes of operation. Especially if the frequency shifts out of grid spec on the generator input to tell the microinverters to shut down. This is how the Tesla Powerwall/Gateway system handles off-grid operation with microinverters when the battery is full.
If pulse a LC CIRCUIT in series L at 100mH and C at 100mF and the pulse at 1v at 630mS you can get 20 and 20 amps out of the capacitor and power A high wall to the load. So says Nikola Tesla.
how many variants of led chips are made, and are utterly qc failures? GOD DAMN CHINA, GOD DAMN ANY COMPANY DOING SUCH BUSINESS You squander opportunity constantly with GARBAGE standardization standards. And garbage qualities of final product. Every electrical engineer before you people would be utterly ashamed and gravely disgraced. This is the spirit you live in you garbage rot.
Now we know HOW the CAPACITOR PLAGUE started! skimping the genuine caps, Genuine capacitor manufacturers sometimes ***purposedly wrote their formulas wrong***, So the thieves that stole the formula went (hahaha) and will create a working capacitor, but then later they see massive failures and possibly face unlimited lawsuits, which they went from (hahaha) to (Sum-Ting-Wong) to (Ho-Lee-Fack!).. Clever!. Karma sometimes is in the Eye of The Intellectual Property Engineer!
Many older 36 inch wide engineering drawing scanners had 4 or 5 scan bars from Fax machines. The sensor bars were physically not all in line but but they buffered them so recombined like one linear array. One i used on the early 90s was like that. All Dos based with a window like interface. To align it in service mode you electronically input an offset. When older one of my early 90s scanner would have one 8.5 inch bar intermittent. Bad caps. So replaced caps all the time. Kept it aways on and that halted its decline.
MPPT is low frequency and requires multiplication so it's probably 100% done by DSP. Waveform following and PWM generation might be DSP based or it could be hardware based, or some sort of hybrid.
Maybe this is part of the Chinese companies' response to America's trade wars. Preemptively swap out western and Japanese components before they get banned
My solar installer wired one of my 9 panel strings reversed polarity into the hybrid inverter. Managed to handle it fine, i was impressed. Though it would have at least destroyed the mppt for that string, but no... It's running fine...
Would love to see a talk through dc blocking in transformer topologies such as H bridge, push pull etc and maybe loop in snubbers, resetting the core techniques. Maybe flyback converters Very interesting topic !
DC, especially higher voltages above 60VDC, are quite dangerous to people in that once you start shocking, your muscles tense up permanently instead of pulsing 100 or 120 times per second from AC 50hz/60hz. This also impacts how switches like light switches and plug sockets would work, since DC arcs are significantly harder to quench than equivalent energy AC arcs. Lastly, providing 240VDC to a house requires expensive power electronics, where 240VAC just needs a dead simple transformer - lower voltages don't travel / distribute well.
In addition to being hard on switch contacts and fuses, you also need AC in order to run induction motors. So fans, refrigeration compressors, etc would all need to be fitted with inverters.
@@eDoc2020 Many "inverter" or "smart" type appliances, like fridges, aircons, washing machines, tumble dryers all incorporate inverters and/or dc/universal motors in their design to achieve the latest A+ efficiency requirements, so they're technically not dependent on input power frequency and could potentially run directly on DC power - although half of the H-bridge on the input side would never work and the other side would almost permanently be closed, which could lead to premature failure if the FETs or IGBTs are low quality or borderline big enough for the initial application.
@@stefanvanzyl9090 Yes, newer inverter appliances already have inverters. Here in the US I have inverter drive on the clothes washer drum motor (which provides fancy spin patterns) and on the furnace blower (which was an aftermarket upgrade after the original motor wore out). These are notable in being multi-speed devices. For single-speed devices like clothes dryers a standard motor is over 90% efficient, no need for an upgrade. All of the refrigeration compressors in the house are single-speed induction motors. These are older but I believe AC motors are still the norm on most new units unless you specifically seek out a high-efficiency appliance. Mini-split air conditioners are the only application where brushless compressors are a given.
Still in northern California and still glad I live here. Nice that the younger suburbia raised "tech bros" have left. Violence and theft no different that all the other US cities, and declining. Basically the same problems across the nation. California has by far the largest population so everything gets noticed, and naysayers find anything they can to dis this state. All that said, PLEASE keep on saying that California is going down the drain..It just makes more enjoyable, more affordable, and more of a creative nexus. Helps us bring back some of the old -pre-techie era life
NVidia are the real pioneers here. Not only did they make graphics cards to drive the first 4K display but made a graphics card to drive Apple's 30" Inch Cinema display just 3 years after this release.
