25.2-V: 30-A High-speed sensorless (> 100 krpm) brushless DC motor drive reference design
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 frequencySpeed-adaptive dual-algorithm for BEMF detectionOperates at voltage ranging from 6 V to 33.6 V delivering up to 900-W output power: output current up to 30A RMSStandby current consumption as low as 22 µAOptimized FET switching for best efficiency and EMICycle-by-cycle overcurrent: motor stall and short-circuit latch protection by MOSFET VDS monitoring
Applications
- Cordless vacuum cleaner
- Full authority digital engine control (FADEC)
- Vacuum robot
- Appliances pumps & fans
Product Categories
- Motor drivers