Driver Design of BLDCM with Trapezoidal and Sinusoidal Compound Excitation
Guo Zhi-da · Electric Drive · 2011
For brushless DC motor(BLDCM),the pulse torque and noise is large with trapezoidal excitation and low with sinusoidal excitation.A BLDCM driver with trapezoidal and sinusoidal compound excitation based on hall sensor signals was presented.Without modifying hardware circuit,the compound driver for BLDCM separately with trapezoidal or sinusoidal excitation or the dynamic switching between these two methods were realized using only the software programming.The experimental results show that BLDCM run table and the switching mode is reliable.The compound driver proposed has extended the application of BLDCM with high accuracy and low noise.