Paul and Sabrina's Cheap 3 Phase Inverter (AC Controller) with Field Oriented Control

[thingstodo]

Originally Posted by MPaulHolmes

... I'm getting my bigger motor's post turned down to 1" this next week so I can finally fit an encoder on it. I've been waiting on them to get back to me about a special order for a 1.125" encoder, but they never did...

One of my encoders is 1 inch inside diameter, the other is 0.75 inch. I guess they won't help you.

[MPaulHolmes]

The 1 inch one would help! Not to be too presumptuous. haha. It's going to officially be a 1" post this time Wednesday.

[thingstodo]

Originally Posted by MPaulHolmes

The 1 inch one would help! Not to be too presumptuous. haha. It's going to officially be a 1" post this time Wednesday.

Hi Paul,

I guess it's not EXACTLY 1 inch ... it measures 25 mm on my calipers, not 25.4 mm

The label on the encoder:

HOHNER 1-905-563-4924
P/N.IN88-ALCS-L7Z2-1024
P/N.0136 MS
S/N.R12089425.3 06/98
MADE IN CANADA PATENTED

The link here shows the specs

240408 - Series IN85 hollow shaft encoder up to 16 mm

280710 - Series PZ incremental hollow shaft encoder up to 115 mm

Neither spec sheet fits well. The second one shows the pinout.

1024 pulses per revolution. 5 - 24V DC input.

I've tested it up to about 2900 rpm. The output is stable, but my encoder card won't read anything faster than 50 KHz.

PM me your shipping address.

[MPaulHolmes]

You basically are doing the equivalent of giving me a free $200. They are charging me $100 to turn down the motor post and cut a new keyway. grr... It will be done friday.

[thingstodo]

Originally Posted by MPaulHolmes

... They are charging me $100 to turn down the motor post and cut a new keyway. grr... It will be done friday.

I just want to make sure that 25 mm will work for you. It would be depressing to ship it to you and have it NOT QUITE FIT.

25.4 mm is equivalent to 1 inch ... and if they are machining the shaft, you would want it to fit WELL when it's done.

[MPaulHolmes]

haha, ya, I just checked it. 25.39 mm. lol. I tried to call them early this morning and it was already done, but I thought they may have made it a hair small. Nope! It's probably not a good idea for me to try to sand it down the last little bit. Maybe I should just order one. Thanks for checking and offering it!!

[thingstodo]

Originally Posted by MPaulHolmes

haha, ya, I just checked it. 25.39 mm. lol. I tried to call them early this morning and it was already done, but I thought they may have made it a hair small. Nope! It's probably not a good idea for me to try to sand it down the last little bit. Maybe I should just order one. Thanks for checking and offering it!!

Anything else that may help with the tests?

[MPaulHolmes]

I think I"m good to go. The motor is officially here and the motor post is now a good size. $134. friggen ripoff. Now I just need to reassemble it. Man those things are simple. Absolutely no moving parts except for the bearings. Thanks thingstodo!

[e*clipse]

Originally Posted by MPaulHolmes

Hi e*clipse, the control board/driver/power board works fine. I've tested all the safety features and the basic functionality with a basic V/Hz scheme at around 320v or so and they work as expected. **snip** It would be really easy to change things for Permanent magnet synchronous. It would be just a couple lines of code to allow for field weakening.

Great news! Congratulations on your progress with this, Paul

Is the board/driver you're testing the same one shown with BOM and Schematics in the Wiki? Or have you done some mods since the last update?

Thanks a bunch,

E*clipse

[Janis]

Hi. Just thinking if I could use this controller for windmill with asynchronous motor for charging batteries with BMS of course? There is Regen and may be some software modification? Good job done!