Comparison Of Several Control Strategies Of The BLDC Motors

Light urban electric vehicles are an important target, both for the researchers and manufacturers. Concerning the motor’s choice, more ways are investigated, but the most important is that as compact as possible solutions have to be used. In the top of the preferences, the permanent magnet synchronous motors (PMSM) and brushless DC motors (BLDC) are situated. These are preferred thanks to their high power density, high efficiency and low maintenance cost. Even the main manufacturing technology and associated power electronics are quite similar, they essentially differ in the controlling technology, simpler and more advantageous being the BLDC. As integration technology, the inwheel motor technology seems to be the one which improves the safety, efficiency, weight, controllability and finally the costs. Even the control principle is very well defined, the practical implementation can be different. The paper deals with four different control strategies for the BLDC motors. They are compared as technical implications and performances.