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Drive 3 Phase PWM with C6000 DSP or other DSP?

78Sys
Expert 1540 points
Other Parts Discussed in Thread: TMS320C6748, 66AK2G02

Which member(s) of the C6000 DSP family have pwm capability to drive a 3-phase motor (6 pwm outputs as 3 complementary pairs) ?

What other Texas Instruments DSP families have 3-phase pwm capability?

  • 0
    TI__Guru 65405 points
    Hello,

    I've forwarded this to the design team. Their feedback should be posted here.

    BR
    Tsvetolin Shulev
  • 0
    TI__Guru**** 161600 points
    Hi,

    The TMS320C6748 devices could work for you, they have a dedicated pwm subsystems:
    -Two Enhanced High-Resolution Pulse Width Modulators (eHRPWMs):
    Dedicated 16-Bit Time-Base Counter With Period and Frequency Control
    6 Single-Edge Outputs, 6 Dual-Edge Symmetric Outputs, or 3 Dual-Edge Asymmetric Outputs
    Dead-Band Generation
    PWM Chopping by High-Frequency Carrier
    Trip Zone Input
    -Three 32-Bit Enhanced Capture (eCAP) Modules:
    Configurable as 3 Capture Inputs or 3 Auxiliary Pulse Width Modulator (APWM) Outputs
    Single-Shot Capture of up to Four Event Timestamps

    The better choice might be the 66AK2G02 device with:
    -Six Enhanced High Resolution Pulse Width Modulation (eHRPWM) Modules .Each Counter Supports:
    Dedicated 16-Bit Time-Base With Period and Frequency Control
    Two Independent PWM Outputs With Single Edge Operation
    Two Independent PWM Outputs With Dual-Edge Symmetric Operation
    One Independent PWM Output With Dual-Edge Asymmetric Operation

    -Two 32-Bit Enhanced Capture Modules (eCAP):
    Supports One Capture Input or One Auxiliary PWM Output Configuration Options
    4-Event Time-Stamp Registers (Each 32-Bits)
    Interrupt on Either of the Four Events
    -Three 32-Bit Enhanced Quadrature Pulse Encoder Modules (eQEP), Each Supports. Each Supports:
    Quadrature Decoding
    Position Counter and Control Unit for Position Measurement
    Unit Time Base for Speed and Frequency Measurement

    Best Regards,
    Yordan
  • 0
    TI__Mastermind 43660 points
    Hello,

    As Yordan mentioned, C6748 would be a right DSP solution which supports PWM. Also you got some suggestion from Randy in C6000 forum.

    Please review these options and let us know of you have any questions.

    Regards,
    Senthil