Speed-Controlled 24V Brushless DC Outrunner Motor Reference Design
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This advanced motor implements closed-loop speed control to maintain an exact RPM across the load torque profile.  The magnetic rotor position is sensed by the DRV5013 Hall-effect sensors, and the DRV8308 controller decides when to drive the CSD88537ND FETs that energize the coils.  No microcontroller or firmware is used, and the intelligent sinusoidal current drive minimizes acoustic noise and torque ripple to maximize motor performance.

As seen at APEC

  • Speed controlled at 2054 RPM for any torque load up to 118 mNm (16.7 oz-in)
  • Power input supports 24V to 32V and more than 5A
  • Outrunner style provides good power density in 6x6x3 cm3 form
  • Easy to modify RPM and max current with resistor changes
  • Design features up to 71% efficiency
  • System has been fully tested and proven

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Schematic/Block Diagram

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Test Data

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD88537ND  60-V, N channel NexFET™ power MOSFET, dual SO-8, 15 mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
DRV5013  High voltage (up to 38-V), high bandwidth (30-kHz) Hall effect latch  Magnetic sensors  Sample & Buy View Design Kits & Evaluation Modules
DRV8308  42-V max sensored sinusoidal control, 3-phase BLDC gate driver with SPI  Motor drivers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD88537ND Download
DRV5013 Download Download
DRV8308 Download Download

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Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guide (1)
Title Type Size (KB) Date
PDF 1852 29 Apr 2014
Design files (2)
Title Type Size (KB) Date
PDF 47 29 Apr 2014
PDF 85 29 Apr 2014
Related Tools & Software

Hardware development (1)

Name Part Number Tool Type
DRV8308EVM Evaluation Module for Three-phase Brushless Motor Pre-driver  DRV8308EVM  Evaluation board 

Software development (1)

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