chinese-ST 6 mosfet 24v-250w controller

[zEEz]

ive never owned an infineon or any bldc controller like this before so i might need help with identifying the insides.

as far as i can see it uses 75nf75 mosfets, i saw an lm317 so i guess thats what feeds the controller circuits, i see an ic in there that says NEC f9234, and another ic that says xc0608.

i didnt think the 6fet controllers were this small.

So you have an Infineon based controller: Luky YOU
Perhaps someone else can confirm if you can program it with the standard or even the
Open Source PC program for the Infineons ....

On my side, I can say that the last controller I bought from

ecrazyman

contains
a SUNPLUS microcontroller
I am very curious -waiting his website to come online- to discover if there is any program to
tune it .....

have fun

[def215]

thats great news!

i had a question, how do you power this controller on?

you dont have to jump anything on the alarm plug right? i have the thick black and red wire from the battery plug going to a battery(6s lipo). do i power it on with the thin red wire from the battery plug by putting it to the thick black?

[zEEz]

it is simple to power it up:

alarm plug: you can leave it disconnected.
Supply plug: thick wires to battery and thin red shorted to thick red to power it on.

have fun!

[def215]

Thanks zEEz. I did that and it powers on, but it doesnt spin the motor at all. And im pretty sure theres power. I get ~4.2v from the throttle when i plug in the battery. I guess this one doesnt do sensorless mode. time to fit the motor with some halls...lol

[zEEz]

hehe, for testing I use a simple trimmer as a throttle (10K).
You should care about the fact that, because of internal failsafe in the controller, it wants only
from around 1.5v to 4.2v --- so the extreme positions of the trimmer are not permitted
and usually they result in a controller-off state.
Moreover, it is good practice to power up the controller with the trimmer at around 1.5v ....

... but I easily believe that your problem is just the lack of the halls ....

have fun!

[zEEz]

As a sidenote ... I gave a look to the source code provided with the 'motor control developer Kit' for the ST6 microcontroller that is used in this 250w e-bike controller.
It is a quite complex piece of stuff: it provides Hall, sensorless, mixed, PID control and several other features ...
In particular it looks like that in standard mode it is providing a fixed PWM sequence that is adapted better to the specific motor as soon as it gather a pair of cycles of valid hall data.
Of course, when the hall is disconnected, the controller continue to work indefinitely providing the standard sequence, thus explaining why it is working even when the sensor is lacking.
Additionally, it is provided also a piece of code that is gathering synchronization data from the unenergized phase (classical sensorless).

have fun!