DRV10964 Datasheet, PDF (18/27 Pages) Texas Instruments – Three-Phase Sinusoidal Sensorless BLDC Motor Driver

DRV10964
SLDS227 – MARCH 2016
www.ti.com
Rm - Motor phase resistance between phase to phase;
Lm - Motor phase to phase inductance between phase to phase;
Kt - Motor BEMF constant from phase to center tape;
f_{FG_max} - Maximum electrical frequency. Maximum motor speed can be calculated from:
• If FGS = 1, RPM = (f_{FG_max} × 3 x 60)/ number of pole pairs
• If FGS = 0, RPM = (f_{FG_max} × 120)/ number of pole pairs
8.2.2 Detailed Design Procedure
1. Refer to Design Requirements and make sure your system meets the recommended application range.
2. Refer to the DRV10964 Tuning Guide and measure the motor parameters.
3. Refer to the DRV10964 Tuning Guide. Configure the parameters using DRV10964 GUI, and optimize the
motor operation. The Tuning Guide takes the user through all the configurations step by step, including: start-up
operation, closed-loop operation, current control, initial positioning, lock detection, and anti-voltage surge.
4. Build your hardware based on Layout Guidelines.
5. Connect the device into system and validate your system solution
8.2.3 Application Curves
NOTE: FG_OUT Signal Being Held HIGH During Locked Rotor
Condition (Stall)
Figure 17. Reference PCB Sinusoidal Current Profile
Figure 18. Reference PCB Start-Up (Align-Acceleration)
Profile
18
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