[GuntisK]

Nobody knows nothing about IGBTs?

[bunalmis]

IGBT and Mos very similar. IGBT need negative gate voltage for fast turn off.

Mos has internal body diode but IGBT hasn't.

[GuntisK]

So, as I understand, I need to replace MOSFET control driver with another-for IGBTs and add diodes.

[kreutz]

Nobody knows nothing about IGBTs?

IGBTs are preferred over Mosfets for DC link voltages over 250 volts. Mosfets have less losses than IGBTs under that voltage. There are good guidelines to design IGBT drivers at the International Rectifiers website. I don't think you need to use IGBt power stage for a 108 volts 18 Amp motor. Nevertheless extrapolating a low voltage design to high voltage high power drive is not that simple, and requires a safe test environment, that power level could be lethal.

[GuntisK]

IGBTs are preferred over Mosfets for DC link voltages over 250 volts.

This means, there is no need actually in IGBTs? In that case-what FETs can You recommend to use in bridge? Coz such a a powerful motor-app. 2kW! I understand that power electronics is not so simple as it seems to be at first sight, but sooner or later I would get in touch with it, because Im learning mechatronics engineering. So, where to get some good reference object about power drives?

[kreutz]

This means, there is no need actually in IGBTs? In that case-what FETs can You recommend to use in bridge? Coz such a a powerful motor-app. 2kW! I understand that power electronics is not so simple as it seems to be at first sight, but sooner or later I would get in touch with it, because Im learning mechatronics engineering. So, where to get some good reference object about power drives?

I am currently waiting for my prototype PCBs for such a drive, read this thread: http://www.cnczone.com/forums/showthread.php?t=14217 , I will post gerbers and schematics as well as a B.O.M. list as soon as it is tested satisfactorily.

My test motor is exactly the same model you have (actually is not mine, it's owner is another member of the CNCzone.). Meanwhile, I recommend you to enter http://www.irf.com/indexsw.html and familiarize yourself with Mosfet and IGBT driving technology. I am only redesigning the power stage for high power, the design is based on the UHU chip.

Regards,

Kreutz.

[lynx]

Hello.

Planned NASR plan. Do you find it good?
Max 232 on separate panels. IR2184 at us available only SMD. I publish it if he is good.

[GuntisK]

Hi! Is this PCB working? Currently I got two other servos (something from Japan), so its worth to try, I think.

[lynx]

I did not rehearse it yet who. I planned a panel in addition to it till now. I would like to have it checked before it. Let me send it possibly to Chan? Let him look at it?

(There are motors to it already, 24V - ~80W. Even 40 piece too. With 500cpr encoder. 8mm joined shaft for couplings.)

But only one controller. I have to build a controller...

Pictures:

motor1
motor2
shaft
controller

[NASR1]

Hello.

Planned NASR plan. Do you find it good?
Max 232 on separate panels. IR2184 at us available only SMD. I publish it if he is good.

Hello
you can used of this pcb (protel 2007).

have good time.

[lynx]

...

Thank you the attachment!
Unfortunately for me only circuitmaker is (pcb - traxmaker). But not problem. (:
The 7400 musts into the panel?

Do you find the others good on the panel?
I would start the building...

[cbcb128]

ade-smc
Look alike

[tmtri1984]

ade-smc
Look alike

i built smc of tiny2313 - 10pu
good!
i post to forum you see
if you can project, you send me a mail
[email protected]

[tmtri1984]

Sorry i'm very busy for my studied. Tomorrow I post all project and setup of scm3a
Good last!

[lynx]

I built it my pcb. Something there is a mistake. The motor does not receive potential.
After starting, the ready led lights. I turn the axis of the motor -> torque limit led -> the driver go servo error.

Do you have an idea?

[mcm_xyz]

Hello guys

Great work everyone... Keep up...
Lynx... Looks like the logic of your circuit works well. The problem is in the final stage... Did not looked at 2104 datasheet but the SD input seems negated. If they are some enable / disable signals then your circuit will never work. (just my opinion)...

[lynx]

...

My version, the SD pin it gets 5.4V. On a data sheet: 3-Vcc there is.
But I missed it (was not at a hand) component:
Vcc - Com 100uF capicator
Vs - Vb 10uF capicator

May cause a problem?

[mcm_xyz]

I think Vs - Vb capacitor is a must in the circuit. This might be the problem.

[lynx]

...

Thank you!
I will replace it today and I try it again.

[lynx]

Cool!
Was a mistake: Vs - Vb need a capicator

I have a big question. How let me programme it processor ideally to my motors?
There is a test bench. I can pretend it the machine axes.

Motors are:
~80W (24V)
500cpr encoder

PSU:
250W, 30V