Mystery 18-FET controller

Electric Motors and Controllers

Mystery 18-FET controller

Postby alpine44 » Fri Jul 07, 2017 9:41 am

Does anybody recognize this controller?

I am trying to figure out the purpose of the connection wires. DC power, phases, halls, throttle, and self-learning are obvious but who knows what the rest is for.

PcbTop_800.jpg
PcbTop_800.jpg (157.68 KiB) Viewed 423 times

PcbBottom_800.jpg
PcbBottom_800.jpg (131.13 KiB) Viewed 423 times


BTW: How do I make the pictures visible in the text? FIXED: Pictures need to be smaller than 800 pixels on largest edge
Last edited by alpine44 on Mon Jul 10, 2017 10:58 am, edited 5 times in total. View post history.
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Re: Mystery 18-FET controller

Postby cal3thousand » Fri Jul 07, 2017 10:59 am

What are the colors/connectors/thickness of the other lines?

You need to hit the place inline button such that this shows up in your text: "[attachment] yourfilename [\attachment]"
Get a Cycle Analyst and a Multimeter, you're still a noob if you don't have at least one of each.

Planning on posting questions or buying anything on this site? Put up your country (at minimum) on your profile. This is a worldwide forum and we haven't reached clairvoyance.
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Re: Mystery 18-FET controller

Postby alpine44 » Fri Jul 07, 2017 4:18 pm

cal3thousand wrote:What are the colors/connectors/thickness of the other lines?

You need to hit the place inline button such that this shows up in your text: "[attachment] yourfilename [\attachment]"


The colors of the other wires do not match anything I found online from various vendors. I will take a photo when I am back home.

Re: embedded images
I hit the place inline button and have the [attachment] tags but pics do not show until you click the link.
I also tried surrounding the file name with the [img] tags but still no joy.
Last edited by alpine44 on Fri Jul 07, 2017 5:13 pm, edited 2 times in total. View post history.
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Re: Mystery 18-FET controller

Postby alpine44 » Sun Jul 09, 2017 9:05 am

I hooked this controller up to several motors and deciphered some of the feature wires.
See attached picture.

FeatureConnectors.jpg


This controller performs surprisingly well in the sensorless mode (after using the self-learning feature). It managed to start an Invacare GB wheelchair motor against the built-in disk-brake. The brake was partially set to a level that did not allow me to turn the rotor with both hands without using a lever, etc. Nevertheless, the controller got the motor turning in the right direction.
Last edited by alpine44 on Sun Jul 09, 2017 9:25 am, edited 2 times in total. View post history.
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Re: Mystery 18-FET controller

Postby alpine44 » Sun Jul 09, 2017 9:28 am

Here is a picture of the label on the controller.
Label_800.jpg
Label_800.jpg (117.79 KiB) Viewed 422 times


Despite the label saying something about 48V, the controller worked up to 60V (as far as my lab supply could go). It cuts out somewhere around 40 Volt on the low side.


BTW: Embedded images are still hit and miss as you can see at this post versus the previous one. Both are using the [attachment] tag. What am I missing? FIXED: Pictures need to be 800 pixels max on largest edge.
Last edited by alpine44 on Mon Jul 10, 2017 10:59 am, edited 2 times in total. View post history.
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Re: Mystery 18-FET controller

Postby Voltron » Sun Jul 09, 2017 10:39 am

To show up, pics are limited to 800 pixels along each edge or something like that.


Like this :)

Label (800x450).jpg
Label (800x450).jpg (88.75 KiB) Viewed 453 times
Last edited by Voltron on Sun Jul 09, 2017 10:50 am, edited 1 time in total. View post history.
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Re: Mystery 18-FET controller

Postby alpine44 » Sun Jul 09, 2017 11:12 am

Thanks. That explains why some pictures worked and others not. I only paid attention to the overall file size.
Last edited by alpine44 on Sun Jul 09, 2017 11:13 am, edited 1 time in total. View post history.
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Re: Mystery 18-FET controller

Postby Voltron » Sun Jul 09, 2017 11:47 am

Yes... I found a resizer that lets you set a default max edge size that made it easier...
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Re: Mystery 18-FET controller

Postby RLT » Sat Aug 12, 2017 8:46 pm

Have you figured out any more tricks to make this work?

Here is the connection diagram supplied by the seller:

ConnectionsController.jpeg
ConnectionsController.jpeg (74.49 KiB) Viewed 310 times


I just got the 48-72V version and the normal way of connecting things just don't seem to work. Have swapped all the hall and phase wires and throttle wires around, but all I get is a blinking 5v LED on the e-bike tester. Maybe the burglar alarm or the door lock or the burglar alarm wires need to be shorted together?

Plus, the 16 ga battery and phase wires are way too wimpy for a nominal 1500 watt 18 FET 50A rated controller.
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Re: Mystery 18-FET controller

Postby RLT » Sun Aug 13, 2017 8:45 pm

Update.

That's interesting... It still doesn't work with the ebike tester, but works fine on a motor. I hooked it up to an old Crystalite 408 motor, and it worked fine.. Didn't even have to mix and match hall and phase connectors even without using the self learn function. Color to color.

After hours of searching I did find a review on Amazon that said you have to hook the thin red and black wires (On the far right red connector in Alpine's photo above) (and the 'burglary power' connector in the chart I posted), to the corresponding + and - battery lines, and I tried that, but it is not correct. After getting the controller & motor working, I unplugged them, and it still worked fine. What they do is CARRY full battery voltage, so beware.

The self learn function is interesting and could be dangerous if your wheel is on the ground. Power down, and hook up the white wires, then turn power back on, and immediately the motor spins up to full speed. Twist the controller half way, and the motor stops. Twist to Wide Open Throttle, and the motor goes into reverse, full speed (Reverse 'full' speed is not really full speed, but limited in controller to about 1/3 or 1/2 of what full forward speedis.)

I also unplugged the halls after this, and the motor runs sensorless. I haven't tried to see how the startup torque is sensorless, but it is nice that you could probably make it back home if your motor halls go kaput.
Last edited by RLT on Sun Aug 13, 2017 8:51 pm, edited 1 time in total. View post history.
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Re: Mystery 18-FET controller

Postby RLT » Mon Sep 11, 2017 4:17 am

I think I may have tracked down the source of this controller:
http://www.focancontroller.com/index.htm
https://www.aliexpress.com/store/group/ ... 47a7XpcDHg

I have a bunch of detailed photos of the insides of the controller, that I'll post in a few days, when I get them sized for the web.
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Re: Mystery 18-FET controller

Postby RLT » Tue Sep 26, 2017 3:34 am

OK I finally got the photos ready to show the details of the inside of the controller, if anyone is interested:

(This is for the 1500 watt controller rated for both 48V and 72V.... I've only tried mine at 48 V (57.8 Hot off charger)

Below each thumbnail is a link to a higher resolution image so as to not waste too much bandwidth.

Image
http://www.az123.com/E-S/MC/MC1.jpg

Image
http://www.az123.com/E-S/MC/MC2.jpg

Image
http://www.az123.com/E-S/MC/MC3.jpg

Image
http://www.az123.com/E-S/MC/MC4.jpg

Image
http://www.az123.com/E-S/MC/MC5.jpg

Image
http://www.az123.com/E-S/MC/MC6.jpg

Image
http://www.az123.com/E-S/MC/MC7.jpg

THE CPU is marked:
GPM813116A0l014
MN68RA
1710


Image
http://www.az123.com/E-S/MC/MC8.jpg


Image
http://www.az123.com/E-S/MC/MC9.jpg

Image
http://www.az123.com/E-S/MC/MC10.jpg

Image
http://www.az123.com/E-S/MC/MC11.jpg

Image
http://www.az123.com/E-S/MC/MC12.jpg

Image
http://www.az123.com/E-S/MC/MC13.jpg

Image
http://www.az123.com/E-S/MC/MC14.jpg

As you can see, there are some small 'bus bars' soldered along the phase traces. Look to be about 1.5MM X 3mm.
Image
http://www.az123.com/E-S/MC/MC15.jpg

Mine is installed in a Chinese three wheel 'pickup truck' with 16S 2P 20AH BatterySpace (GBS) hardshell LiFe prismatic batteries)

So far, It has pulled 2.2 KW for a couple of seconds, and 2.1KW for maybe five seconds. (I haven't put any solder on the shunts to try to increase the amperage), although I did add some bus bars to the major battery power traces... they didn't come from the factory beefed up like the phase traces are. I tested it at WOT for about a mile up a slight grade pulling 800- 1600 watts, and the case stayed cool to the touch... I have a fan on a ~ 90F thermal switch that is Arctic Sllvered to the controller case, and so far the fan hasn't turned on... Ambient temp was about 60F at the time of the test.

I was wrong up a few posts above when I said the battery and phase wires were 16 ga. They are closer to 13Ga.... The insulation is just super-thin. I replaced them with 10Ga silicone wires though.

So far so good. Seems like a pretty good deal for $43.00.
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Re: Mystery 18-FET controller

Postby amberwolf » Tue Oct 03, 2017 11:29 pm

alpine44 wrote:Despite the label saying something about 48V, the controller worked up to 60V (as far as my lab supply could go).

A fully charged 48v pack would be pretty close to 60v.
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