alternator pwm
#3
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James & Ken used my 01 for implementing this feature into their code. Other than maybe some more tweaking to the PID values, it seems to be working very well so far. They added some clever controls, with voltage set points for after start, running, and fuel over run. I've been impressed with it so far, but for full disclosure, the car hasn't done more than idle and drive around our parking lot. Might find time to dyno it next week (hopefully).
#4
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Alternator PWM is a really cool feature I hope fool around with on the next NB MS3x I build.
#6
If I may add a question: What or is there an advantage to the NB alternator control. I'm also getting an MS3 and was thinking of tossing an NAalt on just for kicks and to not mess with the control. Figured it's one less thing to mess with. Does the ecu control open up a whole new world of cool I don't see?
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If I may add a question: What or is there an advantage to the NB alternator control. I'm also getting an MS3 and was thinking of tossing an NAalt on just for kicks and to not mess with the control. Figured it's one less thing to mess with. Does the ecu control open up a whole new world of cool I don't see?
#14
Stop nagging about different alternators, for god's sake . I know about that and DO NOT want a different alternator.
I asked about the pwm control in the latest alpha. Is that so difficult to understand?
Jason, this is a MS3 Pro on a '00. Alpha5 has pwm control, but I can't get it stable, weird things happen when voltage swings up and down between 12.5 and 18V.
Seems I have 2 ways of controlling it: 'nothing' (as in about 12.8V stable) or 'too much' (as in voltage kreeps over 18V after a couple of minutes).
Will play with it some more tomorrow, if I can't get it stable, I'll build the hardware circuit.
I asked about the pwm control in the latest alpha. Is that so difficult to understand?
Jason, this is a MS3 Pro on a '00. Alpha5 has pwm control, but I can't get it stable, weird things happen when voltage swings up and down between 12.5 and 18V.
Seems I have 2 ways of controlling it: 'nothing' (as in about 12.8V stable) or 'too much' (as in voltage kreeps over 18V after a couple of minutes).
Will play with it some more tomorrow, if I can't get it stable, I'll build the hardware circuit.
#17
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The alternator's output is non-linear with duty cycle at extreme duties (high and low). You have to use the non-linear correction curve. If you want to email websales@diyautotune.com, ask me to send you the settings that work very well on my 01. Both the car and laptop are at work, so I don't have access to the tune right now from home.
There will still be momentary voltage spikes when high load devices shut off, but it is very similar to stock control. We spent a lot of time scoping the stock ECU's alternator output against Vbatt, and tuning the response of the MS3-Pro in my car to behave similarly.
There will still be momentary voltage spikes when high load devices shut off, but it is very similar to stock control. We spent a lot of time scoping the stock ECU's alternator output against Vbatt, and tuning the response of the MS3-Pro in my car to behave similarly.
#18
After failing the Binary JC alt control on anything than a stock Hitachi LR170-758 (a repaired one did not work), have the PWM been tested on more than the stock alts?
The PWM control would probably be the same since it tries to emulate the stock control, but I have seen some different input behavior while looking at the Field Out voltage on the JC circuit (different impedance or something, and different views of what zero is).
I just failed with a Mitsu Alt I pulled from my spare car...
The PWM control would probably be the same since it tries to emulate the stock control, but I have seen some different input behavior while looking at the Field Out voltage on the JC circuit (different impedance or something, and different views of what zero is).
I just failed with a Mitsu Alt I pulled from my spare car...
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