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DRV8301-69M-KIT: Mains power supply during development

craig somerville
Prodigy 10 points
Part Number: DRV8301-69M-KIT

Hi,

I am evaluating the instaspin kit DRV8301-69M-KIT and it appears to fit the bill in terms of the drive capacity and for my high current powerpack.

The issue I have is that powering via 10S LIPO cells (36 volts ) all  works fine, however when using a mains power supply again 36 volts and around 1.5 kw I find the mosfets overheat very quickly.

I have been advised that long power cables are not acceptable due to inductance issues and that the regenerative power is not absorbed by a mains supply as it would be using LIPO cells so capacitors must be placed across the DC power lines as in high power radio control ESC units

Has anyone else experienced this and if so ..any solutions. I am trying to avoid charging LIPO cells during the development phase. 

  • 0
    TI__Genius 17175 points
    We have seen issues with this before, generally caused by quick switching of the direction of the motor, or a very quick stop. You may consider building an external circuit called a brake circuit for use in development with your bench supply. We do not have any references for a circuit like this, but it is a standard textbook circuit you can investigate online.

    Sean