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CAMARGO, Fernando Antonio. Driving electric motor using rotor with 1-DOF magnetic bearing. Ed.rev. 2011. 165p. Dissertação (Mestrado) Departamento de Engenharia Mecatrônica e de Sistemas Mecânicos, Escola Politécnica da Universidade de São Paulo, São Paulo, 2011. The Escola Politécnica of São Paulo University (EPUSP) and the Institute Dante Pazzanese of Cardiology (IDPC) is conducting a joint project aiming the development of an implantable Ventricular Assist Device (VAD). This study is part of the development of an implantable VAD in which the pump rotor is suspended by single degree of freedom (1-DOF) magnetic suspension. The magnetic suspension here utilized presents active control only in the rotor axial direction. This magnetic bearing had been presented by Silva and Horikawa (2000) in which the active control is executed only in the axial direction of a rotor. In this work this Axial Magnetic Bearing is referred as AMB-EPUSP. The brushless direct current (BLDC) motor has been elected due to the same reason why a magnetic bearing: the motor should not contact the rotor, minimizing problems of damage to the blood components. However, the driving of the rotor by magnetic forces may interfere in the magnetic suspension. As the stability of this magnetic suspension has been established by the axial stiffness, it is reasonable to expect that the magnetic interaction between the magnetic bearing and the used electric motor may interfere in the magnetic suspension. This study analyzes experimentally the BLDC motor, which rotor is supported by the AMBEPUSP, to identify the behavior of this set using two distinct magnetic flux motor configurations: axial and radial. The analysis includes: (i) design, construction and testing of the axial and the radial BLDC motors; (ii) design, construction and testing of AMB-EPUSP and the rotor to be driven be both BLDC motors; (iii) estimate the BLDC motors behavior using FEM analysis; and (iv) experimental tests execution to identify how each motor assemble option interact with the AMBEPUSP. The FEM analysis corroborates on the recommendation of the radial magnetic flux BLDC motor option as the best choice to drive the VAD with AMBEPUSP, since this motor does not generate any axial magnetic force to be compensated by the magnetic suspension. However, a more complex VAD

Acionamento por motor elétrico de rotor apoiado por mancal magnético com controle uniaxial.