Wow, this video is fascinating! I love learning about electronics and tinkering with setups like this. Your explanation was so clear and engaging. It's great to find channels like yours. Thanks for sharing your knowledge & keep making videos like this !
Thanks for the kind words! If anything, I tend to ramble. But I'm happy that despite that, it sounds like I'm still able to provide useful information for my viewers. I'm not an electrical engineer, but I am happy to elaborate on anything further. The viewer interaction via comments helps me address specific topics. Thanks for watching! If this sort of stuff interests you, I highly recommend checking out two excellent channels that have been my inspiration @CuriousMarc and @lelabodemichel5162.
If you have any type of variable speed controllers, 50/60hz vfd's or dc drives, or even a variac to run a series universal type motor found in electric drills, saws, blenders, ect, you can employ an automotive alternator to get varied frequency, from really low ----- to up into kHz range if spun fast enough. Just find a good way to couple the motor to the alternator. Just another rather primitive way to do it, but it works. Take the diode voltage regulator out of the alternator, and you can get any voltage you want also. At least up over 200v anyway. Would be afraid to take it much higher. And they put out lots of amps too. Also it's 3 phase, so it would have to be balanced if using single phase. Again just more to consider for those that may have these things laying around already. Great video though!
@@markhenderson9069 interesting food for thought. I belive this motor-to-alternator configuration was how they used to generate 115V 400Hz in the WWII era. You can still find these kinds of aircraft AC devices on eBay.
I've played around with old military syncros and resolvers and lucky to have some old solid state ABBOT bricks which also convert 28vdc to 26 vac 400hz. Somewhere in my collection of stuff is a mechanical dyno that does the same thing but uses a lot of power running. Nice find on Ebay !
Lots of fun stuff can be found on eBay, that's for sure. With aircraft stuff, it's either a good deal because it's so obscure... or stupid expensive. There's a few videos of what I presume are 3-phase 115V 400Hz mechanical inverters. Quite an intense machine!
@@HypherNet I couldn’t agree more! As is obvious, video narration is not my skill. But I will work towards more concise explanations as time progress. I’m also planning a follow-up to this video where I construct the third method (mentioned but not shown) using a signal generator and amplifier. Thanks for the feedback, and for watching.
@@mrdouble I didn’t elaborate but should have. The reason I’m using an attenuator into my scope is because the direct 26VAC (RMS) signal right from the DC-AC inverter has too much amplitude to display on my scope. A 26VAC RMS sine wave is equivalent to nearly 74V peak-to-peak!! My scope’s built in attenuators can only reduce a signal to about 40Vp-p, so I had to attenuate the 74Vp-p signal -30dBm to something more displayable. My -30dBm attenuator is rated to 50W so it was perfect for the job… that raw voltage from the inverter is nearly 14 watts so I couldn’t have used my lower rated attenuator. Apologies for not explaining that all better in the video.
Wow, this video is fascinating! I love learning about electronics and tinkering with setups like this. Your explanation was so clear and engaging. It's great to find channels like yours.
Thanks for sharing your knowledge & keep making videos like this !
Thanks for the kind words! If anything, I tend to ramble. But I'm happy that despite that, it sounds like I'm still able to provide useful information for my viewers.
I'm not an electrical engineer, but I am happy to elaborate on anything further. The viewer interaction via comments helps me address specific topics. Thanks for watching!
If this sort of stuff interests you, I highly recommend checking out two excellent channels that have been my inspiration @CuriousMarc and @lelabodemichel5162.
If you have any type of variable speed controllers, 50/60hz vfd's or dc drives, or even a variac to run a series universal type motor found in electric drills, saws, blenders, ect, you can employ an automotive alternator to get varied frequency, from really low ----- to up into kHz range if spun fast enough. Just find a good way to couple the motor to the alternator. Just another rather primitive way to do it, but it works. Take the diode voltage regulator out of the alternator, and you can get any voltage you want also. At least up over 200v anyway. Would be afraid to take it much higher. And they put out lots of amps too. Also it's 3 phase, so it would have to be balanced if using single phase. Again just more to consider for those that may have these things laying around already. Great video though!
@@markhenderson9069 interesting food for thought. I belive this motor-to-alternator configuration was how they used to generate 115V 400Hz in the WWII era. You can still find these kinds of aircraft AC devices on eBay.
I've played around with old military syncros and resolvers and lucky to have some old solid state ABBOT bricks which also convert 28vdc to 26 vac 400hz. Somewhere in my collection of stuff is a mechanical dyno that does the same thing but uses a lot of power running. Nice find on Ebay !
Lots of fun stuff can be found on eBay, that's for sure. With aircraft stuff, it's either a good deal because it's so obscure... or stupid expensive.
There's a few videos of what I presume are 3-phase 115V 400Hz mechanical inverters. Quite an intense machine!
The tone "A" is 440 hz, not 400, just for reference.
@ Don’t forget to check my detailed video descriptions. This was noted prior in my “Errata.”👍
This is cool but pretty wordy in the beginning. I want the 5 minute version of this
@@HypherNet I couldn’t agree more! As is obvious, video narration is not my skill. But I will work towards more concise explanations as time progress.
I’m also planning a follow-up to this video where I construct the third method (mentioned but not shown) using a signal generator and amplifier.
Thanks for the feedback, and for watching.
Im not understanding, why are you using an attenuator?
@@mrdouble I didn’t elaborate but should have. The reason I’m using an attenuator into my scope is because the direct 26VAC (RMS) signal right from the DC-AC inverter has too much amplitude to display on my scope.
A 26VAC RMS sine wave is equivalent to nearly 74V peak-to-peak!! My scope’s built in attenuators can only reduce a signal to about 40Vp-p, so I had to attenuate the 74Vp-p signal -30dBm to something more displayable. My -30dBm attenuator is rated to 50W so it was perfect for the job… that raw voltage from the inverter is nearly 14 watts so I couldn’t have used my lower rated attenuator.
Apologies for not explaining that all better in the video.