VESC HW4.12 total dead-time of the MOSFETs?!

ESK8 Electronics
1

Hello,

I noticed that the dead-time of the MOSFETs seems to be composed of 3 parts.

  1. HW part DRV8302 (or 01), 10K sets 80nS dead-time, 50µS the min possible + 3nS/1K of resistance.
  2. In mc_interface.h #define mcpwm_dead_time_cycles 60, but I ignore the lenght of one cycle, help, please :!:
  3. In BLDC Tool or VESC Tool, you can find dead-time compensation, preset to 0.08µS.

So is the total dead-time equivalent to the sum of those 3 parts, and how long (in nS) is the lenght of a cycle :?::!:

Have a Nice Day.

Thierry

2

Good Morning,

Is my question so hard to respond?!

For me it’s important because I wanna change the Mosfets with others that have different switching characteristics.

Have a Nice Day.

Thierry

3

www.vedder.se you could ask there, good luck

4

Here is the response !

  1. HW part DRV8302 (or 01), 10K sets 80nS dead-time, 50µS the min possible + 3nS/1K of resistance.
  2. In BLDC Tool or VESC Tool, you can find dead-time compensation, preset to 0.08µS allow the user to reduce the HW deadtime.
  3. In mc_interface.h #define mcpwm_dead_time_cycles 60, and a cycle is about 6nS because of the 168MHz CPU clocking.

Have a Nice Day.

Thierry

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