RafBR Big Invert Sim / AC motors made simple

[RafBR]

Hello x-simmers!
Well I think it is time to move on with my new simulator. I am planning it since I finished building my old one (maybe 2 years) but this husband life with kids can consume a lot of this little 24h days

My old sim, the one I posted over Assetto Corsa topic couple of days ago:
http://www.youtube.com/watch?v=93dQEJhv ... 8g&index=1



You may be wondering... why it would be "Big Inverted Simulator"? Thats because I wanted to place the pivot above the simulator and that made the whole thing grow in size.

[RafBR]

I am planning to split this project into 2 subjects:

1st: The hardware needed (motors, gearbox and inverter specs)
2nd: The wiring and setup

This second part I will not dig too much right now but anyone interested in this subject please feel free to mention it here anytime.

hardware/motors:
I think that 0,5hp up to 1,5hp (not sure yet)
They should be three phase (I am almost sure )
are them all reversible (three phase motors) and/or thats what inverted duty is?

hardware/gearbox:
What would be the min and max gearbox output rpm suited for it?
I read something about betwen 20 and 40 but not sure. probably the size or the actuator arm will have great influence on this.

hardware/inverters:
for a 0,5hp motor, one 0,5hp inverter is ok?
Vector control inverter is a must, right?


I will place here a sketch of the simulator layout for you all understand it better.
Some pieces of text I just copyed from other topics here in the forum and pasted here.

[vicpopo]

I am planning to split this project into 2 subjects:

1st: The hardware needed (motors, gearbox and inverter specs)
2nd: The wiring and setup

This second part I will not dig too much right now but anyone interested in this subject please feel free to mention it here anytime.

hardware/motors:
I think that 0,5hp up to 1,5hp (not sure yet)
They should be three phase (I am almost sure )
are them all reversible (three phase motors) and/or thats what inverted duty is?

Inverter duty = commercial marketing.

hardware/gearbox:
What would be the min and max gearbox output rpm suited for it?
I read something about betwen 20 and 40 but not sure. probably the size or the actuator arm will have great influence on this.

too high from 12 to 18 max 20

hardware/inverters:
for a 0,5hp motor, one 0,5hp inverter is ok

you can choose the size just higher for inverter , can support more current .but not 100% necessary .What sure power inverter >= motor power

Vector control inverter is a must, right?

vector flow control for sure if you can

I will place here a sketch of the simulator layout for you all understand it better.
Some pieces of text I just copyed from other topics here in the forum and pasted here.

[/quote]

[RafBR]

Wiring and setup. I know I said that wasnt going into this subject by now but just a few important questions:

1- Is the old AMC compatible with this setup? If so I would use mine and focus on the simulator frame instead of building a new board.

2- Wiring Scheme (some pieces o text from vicpopo):
- The motor is wired in Delta connection (as opposed to Star).
- RC filter for converting the pwm signal to 0-10 Volt
- a board made by us for driving the rotation sens (p1d1 p1d2 etc) from 0 5 Volt to 0 24 volt.

These three are a good example of how a wiring scheme would be good. Like this excellent one made by Thanos:


My old plan and the new one:


My regards!

[RafBR]

Can someone tell me if this inverter is fine:
http://www.altus.com.br/site_en/index.p ... Itemid=117

It looks like its sensorless vetorial capable.


And this one:
http://ageon.com.br/images/B1/XF05%20St ... andard.pdf

this one seems to be pwm senoidal control type (so it must not be vetorial)

regards!

[RafBR]

Now I will let this project hibernating for a while.
At least the AC motors part of it.
The required hardware would cost me about 2 grand!!!
That excluding what I did have purchased already like aluminum, racing seat, etc.

I will think about the possibility of making it with dc motors or just go back to the traditional joyrider design.

I just realized that I have already started a joyrider project here in the forum some time ago.

Anyway updates are comming!

my regards!

[Mertensbart20]

Hello RafBR,

For you question about the invertors and motors, you can take a look at my project

viewtopic.php?f=37&t=335

I think you already did. For the invertors, do you have 3-phase 400V at your disposal? That would help a lot to keep your torque at higher speeds than nominal speed. I would recommend the siemens G120 series (lowest kW). The lowest class inverters can go up the 750W and are not to pricy. I can buy them for 250 euros. If you don't have 3-phase 400V at your disposal I would suggest the Siemens G110 which is his smaller brother and cost about 160 euros. But the G110 can't go up to 400V ofcourse which could give torque problems at high speeds.

For the motors, this depends on the load and the interface. Choosing your AC-motors correctly is very important.If you want to build a sim like mine, just let me * I will share all the plans I have and further details. Not everything is described on the forum. If not, please list all the parameters of the motors you think to buy and I will take a look.

Greetings,
Bart

[RafBR]

Hello Bart,

Yes I was looking to your project yesterday. Very nice and inspiring
I want to thank you for your kind help offer, and later when I afford the hardware for testing for sure I will need help.

regards,
Rafael.

[ferslash]

i could not read the whole topic, but... why do you want to move the pivot point??? why is that better? (by the way, grate idea, i have never seen it before, at least it is original) :d

best regards

fer

[Turn]

You may be wondering... why it would be "Big Inverted Simulator"? Thats because I wanted to place the pivot above the simulator and that made the whole thing grow in size.

I was wondering when somebody was going to finally try this. Having the pivot above the person's head is superior than below: when you step on the gas your head goes back, like in a real car. When the pivot is anywhere below the head; the opposite happens. Same for corners. Also, with an overhead pivot your inner ear sensations will be realistic instead of opposite to reality.

Opposite to reality is not simulation.

I've had a design on paper to do this for years. I think an overhead pivot design is an exciting idea and would love to see somebody try it.

(yes, it takes more power, but would be worth it...)

I guess saying "worth it" depends what you want, though: genuine simulation of motion, or any motion.

Good luck, RafBR.