AC Motor Choice

[Arno]

no I do not have an idea as to what gearboxes, this has probably been covered.

Indeed.
I am using 80:1 gearboxes, which multiply the torque of the motor by 80, while reducing the motor rpm by the same ratio.
The gearboxes I am using are not the most efficient, at about 77% efficiency.

This allowed me to lift the 105 pounds with a 0.25HP motor, without any issue.
The crank arm directly out of the gearbox was about 6" (15cm) long from the center of the gearbox axis, to the center of the arm that lifts the platform.

I think that this will be about the final size of the crank arm.
With a 0.5HP motor, I should be able to do whatever I need.
By the way, my platform will only have 4 motors for now (imagine where the wheels of a car would be) and will not have a center pivot.
No need with that power available.

Cheers,
Arno

[vicpopo]

Hi Arno,

Some news ??

[Arno]

Hello,

Not much at the moment.
I have spent most of my time in Asia this year, and going back there tomorrow for 10 days...

When I come back however, I will be here for a while and will order a 1/2HP motor to redo the tests I did last time, with a better platform.
From there, I intend to build either a 6DOF or a 4DOF, not sure yet.
The incremental cost between both is not crazy, and I feel that I would have a much better simulator if I can build a 6DOF.
I am concerned that my project of putting a motor/gearbox at each corner of my simulator seat platform may not give me the best feelings.

I am open to suggestions, as always.

Arno

[RacingMat]

Hello Arno!

Thanks for sharing these information about AC motors!
What's new? We want more!

yours
Mathieu

[Arno]

Interesting you should ask.
I am actually in Taiwan this week to review some of the choices I have for gearboxes.
I haven't had a chance to pursue this project like I wanted this year, but promised to myself to have all the components picked before the end of the year.
For the gearboxes, I am leaning towards planetary gearboxes.

As for the motors, like I indicated, I will be using 0.5HP motors.
I will have more info soon I hope.

Cheers,
Arno

[RacingMat]

Thanks Arno! Good luck

I'll stay tuned

[Arno]

Hello again,

Not to revive this thread which has been dead for a while, but I finally purchased the motors earlier this year.
I came upon an auction, and I after considerations, jumped on it.
Work has been crazy and I am not very much at home unfortunately...
Nevertheless, I now have 7 (1 spare) SEW 0.75HP motors, with Helical gearboxes.
The gearboxes are 50:1 ratio, but I can slow them down a bit without affecting too much the output I will need.
I have over 150Nm per gearbox output. That should be enough, even slowed down.

They are all identical, and quite long at 25" from the back to the output flange.
The motors came without flanges, so I am going to have to build those first.
I intend to strip the motors and gearboxes, sandblast them and powder-coat them in Red, or Black.
I have a lot of work in front of me, but that should be fun.



Arno

[vicpopo]

Hi Arno,

Yes , a lot of fun in front of you ... Believe me but so interesting with a lot of passion building something to achieve a great target!!!
You will not be bored building your sim rig!

[Arno]

Hi Arno,
Yes , a lot of fun in front of you ... Believe me but so interesting with a lot of passion building something to achieve a great target!!!
You will not be bored building your sim rig!

I am quite excited actually.
Cleaning my garage this weekend to make some room for the project.
Not sure if I should acquire all the needed components, then assemble everything for a test and finally dismantle the motors and repaint, etc...
Or start with cleaning and repainting the motors, then putting them in the sim...

[razzta]

Hi Arno, can you share with us your prototype (structure)?
Also I am interested in the weight of your structure and other elements ... Motors, PSU, etc.
Good luck building...I am still planning!

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