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DRV8301-69M-KIT: Cards blowing up from too much amperage - need a board with higher amperage capablity

Jon Harms
Prodigy 20 points
Part Number: DRV8301-69M-KIT
Other Parts Discussed in Thread: DRV8301, UCC27211

Hello,

We have developed permanent magnet brushless/sensorless 3-phase motors and have used many of the DRV301 kits.  While the motor does run the mosfets continue to blow up.  Input voltage is 48 VDC, output capability of the motor is 4.4 Kw (6 HP).  We can run these motors using Kelly controllers but do not want to go into production with these.  Our software is important and we use code composer perfectly.

Is there a TI controller that we can use?  I understand that the DRV8301-HC-Kit states that it can handle 60 V in; 82.5 Amps full scale range.  Does this controller really have more amperage handling capability than the DRV8301-69M-Kit?

Please refer me to the correct TI part number if the HC is not what we want.  We have been through 6 of 69M kits and right around 30 Amps the mosfets blow up.

Kindest regards,

Jon Harms, CTO; MagLev Energy, Inc.  

  • 0
    TI__Guru** 115420 points

    DRV8301-69M-Kit is the maximum capability for low voltage motor, no other kits can provide higher current than DRV8301-69M-Kit till now. You have to design yourself board if you need higher current and motor need to run with full load in a long time. Not only current capability will blow up the mosfet, and you need to handle thermal of MOSFET also.

  • 0 in reply to Yanming Luo
    Prodigy 20 points

    Hello,

    IS thee another TI product (controller) that we can try?  I understand regarding the current limitation for the DRV8301. 

    The problem is that in that speed the back EMF starts to go beyond 50V. It seems that the pre-driver chip, drv8301, seems to fail on voltages over 60V. When it fails the Mosfets are compromised since wrong data and wrong signals may propagate through the system and in turn the Mosfets may be switched on at the wrong times.

    Your recommendations, please.

    Thank you!

  • 0 in reply to Jon Harms
    TI__Guru** 115420 points
    Right. The maximum voltage of DRV8301 is limited to 60V, so the motor BEMF should be more less than 60V. TI has many MOSFET can support 100V, high current and 120V half bridge mosfet driver (such as UCC27211...). But no such high voltage and high current 3-phase motor drive EVM kit now, you have to design yourself board based on motor specification.