SLLA567 August   2021 MCF8316A , MCT8316A

 

  1.   Trademarks
  2. 1Introduction
  3. 2Concept
    1. 2.1 Optimizing acoustics with sensorless field-oriented control motor driver (MCF8316A)
      1. 2.1.1 PWM Modulation Schemes
      2. 2.1.2 Dead time compensation
      3. 2.1.3 Comparing audible noise before and after optimizing acoustics with MCF8316A
    2. 2.2 Optimizing acoustics with sensorless trapezoidal control motor driver (MCT8316A)
      1. 2.2.1 120° Trapezoidal commutation Scheme
      2. 2.2.2 Variable commutation Scheme
      3. 2.2.3 Comparing audible noise between 120° commutation and Variable commutation with MCT8316A
    3. 2.3 Comparing acoustic performance between Sensorless FOC motor driver (MCF8316A) and 180° sinusoidal motor driver (DRV10987)
  4. 3Summary
  5. 4References

2.2.3 Comparing audible noise between 120° commutation and Variable commutation with MCT8316A

Similar to MCF8316A results, acoustics performance is measured in dBA using a handheld sound level meter. Figure 2-9 shows the noise level comparison between 120° commutation and 150° commutation at different motor speeds. Audible noise is lesser in 150° commutation by 3.3 dBA at lower motor speed operation of 15 Hz and 16.5 Hz.

Figure 2-9 Audible noise comparison between 120° commutation and 150° commutation