SLVA654B June   2014  – March 2019 DRV8301 , DRV8301-Q1 , DRV8302 , DRV8303 , DRV8307 , DRV8308 , DRV8312 , DRV8323R , DRV8332

 

  1.   Hardware design considerations for an efficient vacuum cleaner using a BLDC motor
    1.     Trademarks
    2. 1  Suction Principle
    3. 2  Brushless DC Motors (BLDC)
      1. 2.1 Construction of BLDC Motors
      2. 2.2 Working of the BLDC Motor
        1. 2.2.1 Types of Control
          1. 2.2.1.1 Sensor Control
          2. 2.2.1.2 Sensorless Control
            1. 2.2.1.2.1 Sensorless Control: Using Zero Crossing of the Back EMF Signal
          3. 2.2.1.3 Calculations
    4. 3  Microcontrollers
    5. 4  Gate Driver and MOSFETs
    6. 5  Isolation
    7. 6  Power Management (6 to 60-V DC Power Supply)
    8. 7  CAP and QEP interfaces
    9. 8  Enhanced Controller Area Network (eCAN)
    10. 9  High-Resolution and Synchronized ADCs
    11. 10 DRV8323R
    12. 11 Feedback Stage
      1. 11.1 Torque or Commutation Loop
      2. 11.2 Speed Loop
      3. 11.3 Position Loops
    13. 12 Conclusion
    14. 13 About the Author
    15. 14 References
  2.   Revision History

12 Conclusion

Table 3 lists the performance comparison between a universal AC motor and a BLDC motor. The comparison in Table 3 shows that the BLDC motor provides twice the efficiency gain with better control, no noise, and lighter weight.

Table 3. Performance Comparison Between BLDC and Universal Motor

AC MOTOR BLDC MOTOR
Power
Efficiency Noise		 150 W
35% hum		 50 W
90% complete silence
Size and Weight The AC motor is bigger in size and 33% to 50% heavier than BLDC mortors
Rotation speed Limited to AC frequency (50 to 60 Hz) and is non-adjustable Stepless control and auto adjustment by working temperate
Temperature Rise 95°C 40°C to 45°C because of higher efficiency
Application Range Single purpose Muli-purpose
Life Span Short Long