AC MOTOR CONTROL #7 INVERTER AND BIG MOTOR

[@merethan]

That was very interesting to watch Jason! Learned some new bits, greatly helps me do my own motor controller.

[@jaysjetskis]

Cool glad to help.. when I get back on this will be looking about proportional integral and derivative functions to help control error signals and also many different ways to commutate and improve reliability

[@JamieJones1985]

Nice work. Videos get more natural each week. Looking forward to next week's.

[@jaysjetskis]

thanks jamie yeah im more chilled out with it now :-)

[@PayneKiller23]

Hi Jason! Big like for the motor control series i have learnd lot, i have searched a lot but your videos made it clear to me how a vfd works. I want to make my own inverter, a have the parts recoverd form old units, i am planning to use the vfd to power my lathe replacing the old noise rotary phase converter. Will this simple program on the arduino, run a more complex load like a lathe?

[@jaysjetskis]

Hi there .. well it will but with this code if you apply pressure onto the cutter the motor speed will slow down and speed up again when there is no load.. i am working on a commercial controller with feedback as we speak however i recently discovered a really cool piece of kit you can play with.. check this out its the st ihm0001 dev board kit .. for less than £30 you get the microcontroller board AND THE DRIVER BOARD ... WAIT FOR IT .. AND A SMALL MOTOR ASWELL .. sorry for the caps just really excited lol.. check it out .. its 27 pounds from rs components here in the uk and i aslo say it on ebay for £55 still not bad at the higher price

[@PayneKiller23]

@@jaysjetskis thanks for the reply, i already am putting the vfd together, if i have succeeded i will make some tests under load, i have a bunch of 3phase motors on hand with different hp ratings probably play around with the code. Cheers!

[@terrellbradshaw3504]

Could you use a small VFD like this to "jump start" (as opposed to capacitor starting) a large rotary phase converter to drastically decrease starting inrush current? I got a 60HP motor (230V/460V & 148A/74A) that would be nice to use as an RPC but I only have 200A service. From what I read, inrush would be many times the current allowed for my electrical service. Use the VFD to bring it up to operating speed then switch over to 1PH. Great video btw.

[@jaysjetskis]

Yes you certainly could however you mighr want to add a few igbts to gandle more current

[@AdaptivePhenix]

Hey what an awesome channel.....buggered up my plans for the day but I don't care 😁😎👍👍

[@jaysjetskis]

Thanks craig! Where you from pal? Uk ?

[@AdaptivePhenix]

@@jaysjetskis Back in the UK now, after 30 years in the Detroit area. Looks like you're in to jet skis? Years ago, I had the Yamaha LS2000 jet boat....fun 👍😁

[@skipwilson5086]

was hoping to see a "big" AC motor being controlled by a PWM through an inverter. Got a video on that? Or any suggestions on it?

[@SunnyJulienDivine]

12:03 what's happening here is that you're overmagnetizing the rotor by applying a block-commutated voltage. That means, the stator field jumps 60° when switching, and the rotor tries to keep up to align itself. Therefore the rotor experiences a higher torque that accelerates the rotor to a higher speed than the average field rpm. Once the rotor reaches its alignment point, it no longer experiences any torque, but is still spinning faster than the average field rpm. It overshoots and the motor turns into a generator, pushing current back into the inverter and therefore raising the voltage. Once the rotor speed has decreased, it falls back behind the magnetic pole and the cycle start all over again. Due to enertia of the rotor, this action can become very "springy". Motors that are block-commutated always need a certain amount of load on the shaft or they will start oscillating.

[@SunnyJulienDivine]

Basically this (kzbin.info/www/bejne/jKGsdIZpoLyja7c and kzbin.info/www/bejne/jKGsdIZpoLyja7c) is happening here, just more averaging out due to rotor inertia

[@blackterminal]

can you do it the other way around. more powerful inverter than motor?

[@mdashifkhan7627]

Sir can u please explain that can we use this type of induction motor using dc supply? If yes can you please suggest me the way of doing it.

[@NguyenLe_PoemPmp]

Please tell me what board, shield or Bridge used to control this motor

[@jaysjetskis]

Watch from ac motor control 1 i build the boards from scratch :-)

[@samueladitya1729]

I wonder is it possible to control induction motor by constant slip? for example rotor rpm is 1000 then magnetic field rotation is always 5% faster so 1050, as load increase, stator magnetic field rpm decrease too by lowering frequency so the slip is locked at 5%. So we just control the input voltage like DC motor as frequency automatically adjust itself.

[@jaysjetskis]

Yes . Controlling a 3 phase induction motor uaing this method is one of thw easiest ways its done :-)

[@mdlitonali2260]

I like the KZbin ingeniaring programme

[@jaysjetskis]

Thank you :-)

[@sidemountedracing]

Great stuff, id love that motor for my ev project :)

[@jaysjetskis]

I got that motor for £62 on ebay 3 months ago. Its sat around for years un touched ! Lol

[@sidemountedracing]

@@jaysjetskis what is the end goal with your motor controller, is it for an electronic vehicle project?

[@jaysjetskis]

Yes it will be going into bulding an electric mercedes sprinter van :-)

[@jaysjetskis]

Its s bit full at the moment :-)

[@vctech4954]

All project price? like code and circuit digram

[@berdia0305]

Like Bravo !! )

[@jaysjetskis]

Thank you :-)

[@alijaffri7756]

Single phase frequnce drive

[@scriptkidd1]

Hello, great work you've done there. Can I mail you? I am trying to replicate your setup but running into some trouble.

[@jaysjetskis]

[e-mail]

[@hiiamtonytonychopper9161]

can i use this motor to made electric car !

[@jaysjetskis]

Thats exactly what i intend to do with it

[@ardwikarindra9261]

Iam from Indonesia Java Bekasi tambun my nama Indra good experiment

[@MustafaKhan-jt4rb]

please Sar help me

[@primodernious]

that motor is very small. anything that weight less that 3 tons shit.

[@jaysjetskis]

Size is relative now isnt it. Its a big motor for a electric car. But a small motor for a large pumping station. So i dont see your point .. anything less than 3 tonne is shit? There are lots of amazing things , including motors that are amazing and weigh less than 3 tonnes?