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I wasnt satisfied with the stock 1800RPM speed of this motor, so I decided to do a little "overclocking" the DIY way. For the first half of the video, what you see is the motor being ramped up from 100Hz to 300Hz sinewave at 125VAC. This is a synchronous type AC induction motor, so increasing the frequency also increases the rotational speed. The second half of the video shows the setup for this experiment. At 2:14 you can see the bulk of what is used. A high powered audio amplifier sits on top of a 24VDC 30A power supply, on the left side you can see a toroidal transformer, this is being used in reverse to step-up the output from the amplifier into something usable for the motor. 17V bumped up to about 125V. Later, you can see the PC screen with oscilloscope and arbitrary waveform generator. The program is called SoundARB, is free and allows you to use your sound card as a function generator up to about 20kHz.
@NightWolfx03 Yep.
Is that amplifier from Sure Electronics ?
nice work man
@TehMG I .. need .. to .. know .. more! argh the "wait a minute how does that work" receptors in my brain just starting firing like it was 1941 and my life depended on it!
@sajabz2007
Sinewave software -> sound card -> powerful amplifier -> step-up transformer -> motor
Simple.
@mturgeon2 Your controlling the frequency VIA the sound card? .. Please tell me how!! Freeking awesome
Cool experiment and thats a nice toroid, it must have come from an old Altec Lansing speaker system. I had to replace the filter caps in mine because it had a lot of hum.
when do we get this 9000 rpm set-up for an e-bike!
@GrandpaTD It was spec’d at 75W RMS per channel I believe, and in my tests I was able to obtain 70W or somewhere around there.
How many watts is your audio amplifier?
put this in your vacuum cleaner and see what happens
@x73rm Actually that is my Windows machine, and yes it is controlling the frequency (through the sound card via a waveform generator program) I haven’t gotten around to buying a function generator yet.
The Linux machine can be seen briefly at 1:31 (the o’scope is sitting on top of it) and is a server running CentOS without a GUI.
@x73rm Actually that is my Windows machine, and yes it is controlling the frequency (through the sound card via a waveform generator program) I haven’t gotten around to buying a function generator yet.
The Linux machine can be seen briefly at 1:31 (the o’scope is sitting on top of it) and is a server running CentOS without a GUI.
nice linux machine… does it control the freq ??
nice linux machine… does it control the freq ??
man how to do that
man how to do that
@HmongGuitarPlayer
Well it’s more of an "educated guess" than anything. Basically I calculated from the frequency it’s operating at.
I suppose I could have used my scope and an infrared sensor to get the exact speed, but this was just a quick and dirty experiment and I wasn’t too worried about accurate numbers at the time.
@HmongGuitarPlayer
Well it’s more of an "educated guess" than anything. Basically I calculated from the frequency it’s operating at.
I suppose I could have used my scope and an infrared sensor to get the exact speed, but this was just a quick and dirty experiment and I wasn’t too worried about accurate numbers at the time.
how do you know how fast it is if you don’t put a tact to read the speed.
how do you know how fast it is if you don’t put a tact to read the speed.
Been a while, but I think it was up to 300Hz.
Been a while, but I think it was up to 300Hz.
what hz are you running it to?
what hz are you running it to?
LOL it’s all good. Easy to miss that.
LOL it’s all good. Easy to miss that.
I was referring to a DC type
I was referring to a DC type
Oh i don’t? What do you think makes an AC motor spin? It is the frequency. Voltage and current don’t have anything to do with it. If you get an AC motor from, say, Japan that is designed for 50Hz operation and hook it up in the States on 60hz, it will run faster. I know this from experience.
If it were a DC motor, then yes you would be correct.
Oh i don’t? What do you think makes an AC motor spin? It is the frequency. Voltage and current don’t have anything to do with it. If you get an AC motor from, say, Japan that is designed for 50Hz operation and hook it up in the States on 60hz, it will run faster. I know this from experience.
If it were a DC motor, then yes you would be correct.
You dont know what you’re talking about.
Hes supplying more power to to motor thus allowing more current through to spic the motor faster
You dont know what you’re talking about.
Hes supplying more power to to motor thus allowing more current through to spic the motor faster
Intel wins again
Intel wins again