Internal circuit diagram for 48v 750 bldc ebike controller

[Saikumardanda]

Can you please anyone give internal circuit of bldc controller and explain the working of each operation of controller like speed control,key lock,reverse switch,horn,side indicators, and accelerator.

 

[fechter]

That's a pretty tall request. You will not find any schematics of most commercially available bike controllers. The companies that make them keep it "secret" so other companies don't copy the design. These days the hardware is pretty generic but the software is where the interesting stuff happens.

There is a wide variety of models out there, each with it's own set of features and ratings.

Here is an application note that has a good explanation of how a typical BLDC controller works.
http://ww1.microchip.com/downloads/en/appnotes/00857a.pdf

Another one:
https://www.st.com/content/ccc/reso...df/jcr:content/translations/en.CD00004396.pdf

 

[mark5]

It's not 48v 750 but there's a circuit diagram here:

Albert van Dalen: KU63 e-bike motor controller
https://avdweb.nl/solar-bike/electronics/ku63-motor-controller

 

[amberwolf]

There *are* open-source controller designs, like the VESC and derivatives, that will have schematics, code, etc. I don't have any direct links, but there's a few threads here on ES, if you search titles and/or first posts of threads for "open source".

Other sites also have open-source controllers, including the original VESC (vedder esc) site(s).

They won't be much like typical ebike controllers, but they'll show you what the circuits and software are like to make your own controller (presumably what you are wanting to do).

 

[fechter]

It's not 48v 750 but there's a circuit diagram here:

Albert van Dalen: KU63 e-bike motor controller
https://avdweb.nl/solar-bike/electronics/ku63-motor-controller

That's a good one. Most inexpensive Chinese controllers will be very similar to this.