Measurement of Objective Function for BLDC Motor Optimization

The design of electrical motors is founded on an inventive idea which creates basic motor structure. Then optimization of dimensions and other parameters follows. Finally, a control or switching strategy can be optimized. This article describes a measurement of an objective function for BLDC motor control optimization. Namely measurement of no load speed and current, efficiency estimation, and noise as a function of the current commutation angle is described. The commutation angle is usually derived from Hall sensors, and its correct value is important for high efficiency and other motor characteristics. Experimental measurements show how speed, current, efficiency, and noise spectrum depends on commutation angle. Presented measurements are primarily intended for in situ optimization of commutation angle on running motor.