Is it possible to B-G431B-ESC1 ESC to higher Voltage by swapping the Buck converter for the logic?

MThal.2 · ‎2022-07-27

I have a BLDC Motor which is rated to run at 14S, but the ESC only supports 6S. Can I simply remove the Capacitors and the 10V Buck Converter to something capable of the higher Input Voltage. I'd also swap the VBUS Voltagesplitter to compensate.

I would leave the Mosfets, as they are capable of 60V and I'd supply it with up to 58.8V.

Is there some complication I am not aware of?

Any help is much appreciated

Peter BENSCH · ‎2022-08-08

Welcome, @MThal.2, to the community!

In principle, it is possible, although not necessarily sensible, to operate the B-G431B-ESC1 at a higher voltage. The 10V of the switching regulator must remain because this is, among other things, the supply voltage of the gate drivers. However, you would not only have to change the L7986, because it can only handle a maximum of 38V, but also adjust everything at V+, i.e. D20, C27...C41 and C44, as well as the voltage divider R68/R76. In addition, the 58.8V is too close to the maximum 60V of the MOSFETs, which offers far too little margin in case of voltage peaks, which can destroy the MOSFETs very quickly. You should therefore use at least MOSFETs able to handle 100V for this.

As you can see, that's a lot of changes and a lot of work. Do you really want to go to all this trouble?

Regards

/Peter

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Peter BENSCH · ‎2022-08-08

Welcome, @MThal.2, to the community!

In principle, it is possible, although not necessarily sensible, to operate the B-G431B-ESC1 at a higher voltage. The 10V of the switching regulator must remain because this is, among other things, the supply voltage of the gate drivers. However, you would not only have to change the L7986, because it can only handle a maximum of 38V, but also adjust everything at V+, i.e. D20, C27...C41 and C44, as well as the voltage divider R68/R76. In addition, the 58.8V is too close to the maximum 60V of the MOSFETs, which offers far too little margin in case of voltage peaks, which can destroy the MOSFETs very quickly. You should therefore use at least MOSFETs able to handle 100V for this.

As you can see, that's a lot of changes and a lot of work. Do you really want to go to all this trouble?

Regards

/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.