Low-cost sensorless BLDC for organic fluids treatment in sterile environments

This paper presents the design and realization of a brushless DC motor-based gear pump for the treatment of organic fluids in sterile environments. Details of the FEM simulations used throughout the mechanical and electromagnetic design of the electrical machine and of the sensorless control algorithm, implemented on a motion control-oriented fixed point DSP, are reported. Construction and experimental testing of a prototype are reported as well. The realized pump features a very compact design and a fairly efficient operation.