On Fri, 21 Jun 2013, propcoder wrote:
> Date: Fri, 21 Jun 2013 00:12:58 +0300
> From: propcoder
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] BLDC - not smooth rotation with hostmot2 and 3-p
Ok, I understood that voltage, much higher than rated for motor is not a
good idea (unless in my case).
I tested IRAM board with 42 Volts. And motor behaves almost the same.
There are positions where torque appears to be very low. Maybe there is
something to do with how high and low transistors
On Tue, 18 Jun 2013, propcoder wrote:
> Date: Tue, 18 Jun 2013 22:57:18 +0300
> From: propcoder
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] BLDC - not smooth rotation with hostmot2 and 3-
On 2013.06.18 15:59, Peter C. Wallace wrote:
> Maybe tha actual physical dead time is causing your torque ripple
What do you mean by "actual physical dead time" - electric (which I
described earlier) or physical some..?
> IGBTs have a large on voltage (maybe 2V or so) which will add to non
> lin
On Tue, 18 Jun 2013, propcoder wrote:
> Date: Tue, 18 Jun 2013 09:53:33 +0300
> From: propcoder
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] BLDC - not smooth rotation with hostmot2 and 3-phas
> I would not expect very smooth operation in 'D' or step motor mode (no
> encoder
> feedback/PID), especially with IGBTs and their long switching times that
> neccessitate a large dead zone. Do you have the dead zone time set
> properly? I
> think the default is 5 Usec which is (deliberately) hu
On Mon, 17 Jun 2013, propcoder wrote:
> Date: Mon, 17 Jun 2013 12:33:47 +0300
> From: propcoder
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] BLDC - not smooth rotation with hostmot2 and 3-phase
&g
I started to test IRAM module with MESA 5i23. I use TPEN6_6 firmware and
bldc module in "n" mode.
I am rotating it slowly (setp bldc.0.frequency 0.2). PWM outputs are
true sinusoidal (checked on scope), but motion has some smooth
(non-linear) parts and stop parts.
BTW, I can't use bldc "n6"
