Sinusoidal Commutation Benefits
D-Sinus motor controllers are state of the art sinusoidal commutated speed controllers. This commutating principle regulates motor current to a sine wave. This is done to ensure an ideal and highly effective motor control.
Integrated current monitoring prevents the motor “overrunning”. The main benefits of sinusoidal commutated speed controllers compared with block commutation are significantly smoother motor running and less motor warming.
As an overview there follows a short description of block and sinusoidal commutation:
Motor with n pole pairs (positioned at 60°/n exactly known; commutation every 60°/n).
Block-shaped phase current (torque ripple, vibrations, hum).
Blockcommutation with or without Hall sensors is characterized by an abrupt switching of the motor current every 60° (or after every 60°/n).
Sinusoidal phase currents (120° phase displacement, similar to synchronous motors with variable frequency, no torque ripple, high synchronism, high starting torque).
High synchronism is achieved by gradually aligning the phase currents.
Increased efficiency due to sinusoidal current waveform, created torque is constant in contrast to block commutation.