25.2-V, 30-A High-speed sensorless (> 100 krpm) brushless DC motor drive reference design
TIDA-010031
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Key Document
- 25.2-V, 30-A High-speed sensorless (> 100 krpm) brushless DC motor drive
(PDF 9046 KB)
15 Jan 2019
Description
This reference design is for high-speed sensorless trapezoidal control of 6–33.6 V DC-fed brushless DC (BLDC) motors up to 900 W and motor speeds of up to 180,000 rpm (verified up to 100,000 rpm). A costeffective smart microcontroller with a hardware detection of the commutation points accelerates the sensorless trapezoidal control using speed-adaptive Back EMF (BEMF) detection. The BLDC power stage is compact, optimized for efficiency, and fully protected against short circuit, motor stall, and overtemperature, due to the smart three-phase gate driver.
Features
- High-speed, sensorless trapezoidal control up to 3-kHz motor electrical frequency
- Speed-adaptive dual-algorithm for BEMF detection
- Operates at voltage ranging from 6 V to 33.6 V delivering up to 900-W output power, output current up to 30A RMS
- Standby current consumption as low as 22 µA
- Optimized FET switching for best efficiency and EMI
- Cycle-by-cycle overcurrent, motor stall and short-circuit latch protection by MOSFET VDS monitoring
See the Important Notice and Disclaimer covering reference designs and other TI resources.