[Ivansgarage]

Here is settings from mizlplix curtis controller

http://ivanbennett.com/forum/index.php?topic=13.0


This just part !!!

-Max speed- 500-8000RPMs- set it at your motors maximum safe RPMs.

-KP- 0-100%- How aggressively the controller holds (under steady cruise) to the top RPM you just set. A medium setting is a safe starting point. (I like 10%)

-KI- 0-100%- This is the deceleration rate (back downwards) if the motor overshoots the maximum setting, (like freewheeling down hill.) A medium setting is good here too. (I like 30%)

-KD- 0-100%- This ramps down acceleration as it nears top RPM setting (to stop overshooting). A lower middle setting is best. (I like 5%)

NOTE: If you set your controller to very aggressive settings thinking to get the Maximum performance out of it, it will just start getting unstable, overshooting, dropping, overshooting...."wig-wagging".
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[Ivansgarage]

Is there a potentiometer or setting for Gain of the throttle input command--what is the maximum allowed throttle voltage in the controller, and how much does your throttle switch generate, e.g. at max WOT.

http://ivanbennett.com/forum/index.php?topic=13.0

-Forward dead band- 0-5.0 volts This is to create a "dead" area so that if your controller fails to zero each time, it will not cause the car to creep forward when stopped. (I use .3 volt)

-Forward map- 0-100% This setting causes a slower low end response to the "gas" pedal. Making it smoother to drive. (I use 100%)

-Forward Max- 0-5 volts This setting defines what "full throttle" is. (I use 4.5 volts)

-Forward offset- 0-5 volts This sets the amount of throttle pedal movement to start the vehicle moving. Some heavier vehicles will need this set up higher to stop an annoying large pedal stroke before the car starts moving-and then a small stroke to drive down the road. (I use 0)

 

[Ivansgarage]

Deans Mizlplix Car We used Deans car for motor testing (and Dyno) plus controller settings

 

[Ivansgarage]

Today I have set the throttle mapping to 80% and PID settings to 10%, 30% and 5% and it is marginally better I think. I need to get the exact values for the AC 50 motor (as described by Curtis) for the 1239E controller in particular. I don't know if these are any different from the 1238 as I don't have the 1239E settings manual yet. Does anybody have the motor tuning values?

Thanks...

On motor settings Curtis does not have anything to do with the settings
But Curtis Controller does have a generic software for motors,
it is HPEV who does the settings it is there motors. HPEV is the ones that
wrote the VCL (vehicle control language)

And between the two controllers 1238 and 1239 same software I know (difference battery voltage)
this for a fact because I have the software (flashes for the proms)

 

[Ivansgarage]

Didn't you buy that from HPEV?

All the setting should be set.

I would not run the optimize it will change the slip setting
and it will not be correct.

 

[Ivansgarage]

You never did answer the question, has that motor ever been optimized
with that controller?

It will never run correctly unless optimized no-matter how many settings you change.
The controller does a mapping of the magnetic field of the motor and has nothing to do
with the setting, per-say. make sense?

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[Ivansgarage]

Nobody asked the if the motor has been optimized, but the answer is 'no' it hasn't been optimized. In a previous response you said not to do that. I guess you assumed it had already been done?

Yes I thought you bought it as a package deal from HPEV

So does the controller have HPEV VCL on it?

 

[Ivansgarage]

The controller was straight out of the box, direct from Curtis. I am in uk, so HPEVS is not a normal supplier here for the controller. Is there a difference between HPEVS VCL and what comes direct from Curtis?

Thanks...

The HPEV has all their motor setting preset and most of the setting
are not changeable you done good except you got to optimize it
and you will notice a big diff. in performance the only trouble you will
have is setting the slip which makes a big diff. The optimize program
does not set the slip right. (I have a dyno and can do locked rotor with
a scale to set the slip) (the slip is the torque turning force)

Let me know I am still trying to find out what the slip is at on a HPEV
AC-50 that will save ya a bunch of trouble.

I found out what the slip is supposed to be 1.33 AC50

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[Ivansgarage]

Slip is a speed difference. I suppose you could measure it as the speed at which maximum torque is developed with the rotor locked, but that would give an actual speed (in revolutions per minute or whatever), not a difference (slip is always 100% with the shaft not turning). I would expect it to be a fraction (percentage) of shaft speed in a running motor. What are the units of the value "1.33"? Is it 1.33% of shaft speed?

"What are the units of the value "1.33"? Is it 1.33% of shaft speed?"

really don't give a shit its what the the curtis controller needs to put out maximum torque.
We are not trying to design a new motor we are trying to get his controller set up.
I know what slip is it's the lag in the magnetic field (rotor lag)

LOOK it UP

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[Ivansgarage]

This is the big difference the SLIP gain has on the motor torque.

http://ivanbennett.com/forum/index.php?topic=17.msg1482#msg1482

Here is the numbers after the locked rotor test. The motor optimized at 7.00 on slip.
(torque is foot pounds)

slip -- torque -- amps
7.00 -- 142 -- 260
6.00 -- 160 -- 270
5.00 -- 180 -- 280
4.00 -- 220 -- 270
3.50 -- 225 -- 254

Looks like 3.50 is the best on slip gain. Had to turn brake pressure up all the way to hold it from turning.

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[Ivansgarage]

Thanks for the help. My plan at the moment is to get the car with the wheels off the ground on Saturday and run through the optimization procedure. Currently the settings I have puts the slip gain at 3.20. If I set this to 1.33 now will that cause a problem? I have left these values alone so far.

Also to optimize the motor etc., can I just put the gearbox in neutral? Save me having to jack the car up?

I need to check the values to run the optimization, but doe anybody have a recommendation about the rpm to run the procedure at? It seems I can choose, but don't know what to use.

I do have an extensive background in electronics and I have worked with some of the Siemens simovert drives for the dc motors used on industrial power presses. I have a good understanding. It has been many years since I worked in this area, but I do remember a fair amount. From my triaing and memory slip gain is like a ratio, so it has no units.

Shall I set the slip gain now before I optimize?

Thanks...

Yes just put it in neutral I would jack up the wheels just for safety sake.
do not worry about the slip you will change it after optimization.
Yes 1000 rpm is OK
You will get errors after optimization they allways come up don't worry about them. unless it does not optimize.

Optimizing Mizs motor.

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