A strategy for designing of customized electromechanical actuators of blood pumps

Autor(es)

de Souza, Rogerio Lima ^[1] ; Chabu, Ivan Eduardo ^[2] ; da Silva, Evandro Drigo ^{[1, 3]} ; Pazin de Andrade, Aron Jose ^[3] ; Leao, Tarcisio Fernandes ^{[1, 3]} ; Perpetuo Bock, Eduardo Guy ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] Fed Inst Technol Sao Paulo IFSP, Lab Bioengn & Biomat BIOENG, Dept Mech, Ave Alto Parnaiba 491 Cidade Patriarca, BR-03556030 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Lab Appl Electromagnetism LMAG, Dept Elect Engn, Escola Politecn EPUSP, Sao Paulo - Brazil

^[3] IDPC, CEAC, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ARTIFICIAL ORGANS; SEP 2019.
• Citações Web of Science: 0

Resumo

Congestive heart failure is a pathology of global incidence that affects millions of people worldwide. When the heart weakens and fails to pump blood at physiological rates commensurate with the requirements of tissues, two main alternatives are cardiac transplant and ventricular assist devices (VADs). This article presents the design strategy for development of a customized VAD electromagnetic actuator. Electromagnetic actuator is a brushless direct current motor customized to drive the pump impeller by permanent magnets located in rotor-stator coupling. In this case, ceramic pivot bearings support the VAD impeller. Electronic circuitry controls rotation switching current in stator coils. The proposed methodology consisted of analytical numerical design, tridimensional computational modeling, numerical simulations using Maxwell software, actuator prototyping, and validation in the dynamometer. The axial flow actuator was chosen by its size and high power density compared to the radial flow type. First step consisted of estimating the required torque to drive the pump. Torque was estimated at 2100 rpm and mean current of 0.5 A. Numerical analysis using finite element method mapped vectors and fields to build stator coils and actuator assemblage. After tests in the dynamometer, experimental results were compared with numerical simulation and validated the proposed model. In conclusion, the proposed methodology for designing of VAD electromechanical actuator was considered satisfactory in terms of data consistency, feasibility, and reliability. (AU)

• Processo FAPESP: 17/25233-9 - Bomba centrífuga de suporte circulatório temporário pediátrico
• Beneficiário: Mariana Maria Aparecida Pinto Hernandes
• Linha de fomento: Auxílio à Pesquisa - Pesquisa Inovativa em Pequenas Empresas - PIPE