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  • TI Thinks Resolved

bRUSHLESS pm MOTOR CONTROL

WE ARE MOTOR DESIGNERS AND NEED CONTROLLERS. The power levels and voltages are high, typical voltage is 400-500 and current levels in the 50 to  100s amps. These are for EV use. We need design help mostly to decide on a path for the best solution.  Advice please as to what family of TI products would be most applicable.

thank you.

ronald doctors

rdoctors@newultimatemotors.com

  • Hi Ronald,

    Can you please confirm if the current load you will experience is instantaneous, continous, or startup inrush current.

     

    Hector Hernandez
    Motor Applications Team

  • In reply to Hector Hernandez Luque:

    Hi Ronald,

    Any input on the kind of current you mentioned?

     

    Hector Hernandez
    Motor Applications Team

  • In reply to Hector Hernandez Luque:

    The motor can accept at least 100 amps and that is the current target for the controller. In use the motor current could be from 0 to 100 amps. Most of the time it will be about 20 amps. The 100 amp peak could be as long as 10 seconds. Output devices will most likely be IGBTs and the selection for these is not our biggest challenge. We need a start with a family of chips that are designed for motor controllers. 

    FYI we are using a servo controller limited to 30 amps and it uses Hall cell for feedback. The speed control is really current control as it is the torque that is controlled to give a user the same feel as a gas pedal. 
     We could add an encoder so we would have better current timing and control. The controller would need to have similar properties to those used in the Nissan Leaf and GM EV cars..
  • In reply to Ronald Doctors:

    Hi Ronald,

    In the motor drivers catalog, we do not have a motor driver that can achieve the current and voltage you seek to operate in. Please look in the Gate Driver complete catalog to see if a part meets your current and voltage needs.

    www.ti.com/.../products.html

     

    Hector Hernandez
    Motor Applications Team

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