Modeling study of an Implantable Centrifugal Blood Pump actuator with redundant sensorless control

The permanent magnet brushless direct current motor (BLDC), have been the main component in most of the Ventricular Assist Devices (VAD) development. An Implantable Centrifugal Blood Pump is being developed at the Institute Dante Pazzanese of Cardiology (IDPC) as VAD to assist patients with cardiovascular diseases. To develop a high performance controller is necessary to have a reliable virtual model of the BLDC. Toolbox SimPowerSystems software package was used to study the dynamic system. Permant Magnet Synchronous Machine (PMSM)block implements the differential equations for the motor through a state-space model, this is main contribution of this work. Sensorless control was used as redundant position rotor control. The model showed satisfactory results when compared with data given by the manufacturer in its catalog. In future works, the results presented in this work will be used to improve the motor model. Thus, it will allow reliable simulations of new proposed controllers.