Body
DougYou have some good questionsLet me give it a try.First, a questionAre there field coils?What creates the magnetic fields these two coils on the armature act against?What energizes those electromagnets in the field?Perhaps the field electromagnets need dc to operate? The diodes rectify some AC. The cheap little ceramic magnet gets the whole proccess started. Interesting!Then again, you need a spark to fire that little two stroke gas engine.Wow too much design and brain power going into that little gen set. It makes my head hurt.What we see here is a roomfull of brilliant underemployed engineers with not enough to do, and no deadlines to get out the finished product. Only in China?In Canada, we work on a shoe string to meet rush orders, or get laid off, when there is no work.
My next questionWhat are we trying to achieve?I want a self runner too.How is a permanent magnet DC motor not good? The one on my ship's drill press, hooked to a puny 300 watt inverter, 500 watt variac, bridge rectifier and a double pole, double throw switch for reversing can drill 1" holes through stainless steel, using Silver and Demming drill bits, without blowing the inverter breaker. The drive belt might slip, but that motor doesn't stall.This is a shitty little, cheap Chinese drill press, that the 120 volt, squirrel cage motor, it came with, wouldn't even twitch the chuck, running off the 12 volt dc to 120 volt ac, 300 watt inverter, in the boat workshop.My big Japanese Kira drill press in my studio has a bitch of a time drilling stainless steel, even though it is a heavy duty piece of equipment.It may be that I can slow down the dc motor and get an even better tune to the cutting speed, but what does that say about the dc motor? They have torque to burn, yet run cool.My wife gave me a professional Dewalt cordless drill for Christmas, the drill and impact combo kit. I frigging love them, and would have never bought them for myself. I can not believe the power, and how long the quick charging batteries last.My point: super magnets!The dc motors with super magnet fields are crazy good.We need big permanent magnet motors with super magnet fields.We are farting around with less!I think the car guys are getting them all, and we are not getting to play with them yet.Just my thoughtsCheers WarrenSent from Yahoo Mail on Android
On Sun, Feb 25, 2018 at 7:09 AM, 'Douglas L. Konzen' [email protected] [EVGRAY]<[email protected]> wrote:
Hi all
In attachments are two photos of the insides of one of those 750W usually gas-engine powered gensets just like the guy from Indonesia has on the right side of his motor generator.
I see the slip rings, I see the 2-pole rotor (so this will take 3600rpm to make 60hz) and inside the plastic housing on one end of the rotor is a diode (actually there are two) and these connect to the ins and outs of the coils somehow....I would think these diodes are sort of "blocking" (big zener?)diodes so that the generator will not produce power until it gets to speed of 3600rpm and makes the 120VAC or the 220VAC and only then will it let power pass through, so this is a feature to make sure the generator only produces 120VAC and nothing less, especially during start up or warm up and a load is attached to the generator....
Is this correct about those diodes??? Or are they something else?
The other question is about that little ceramic magnet imbedded into the rotor you can see in the photo in attachments....so what exactly is this for??
To help magnetize the core a little bit and give it some polarity perhaps?
Why is there only one?
Is there a hall effect somewhere on stator or small coil that this reacts too and serves as some sort of over-speed governor? (guessing)
Maybe it helps smooth out the sinewave somehow? (but why only one?)
Anyways this is exactly what is inside the Indonesian genset seen in video to the right of the looping motor generator....
perhaps he put in his own rotor of permanent magnets and that is part of it all???
If anyone can answer my questions it would be appreciated...I hope you can all see the photo attachments...
ciaoKone
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