Magnetic bearings for mechanical cardiac assist devices /

Magnetic bearings are mechatronic devices that produce contact-free electromagnetic force to support a load, such as a moving train or a spinning rotor. Compared to traditional bearings, magnetic bearings offer several advantages: no friction, low heat generation, no required lubrication, quiet oper...

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Detalles Bibliográficos
Clasificación:Libro Electrónico
Autores principales: Day, Steven (Steven W.) (Autor), Cheng, Shanbao (Autor), Gomez, Arnold David (Autor)
Formato: Electrónico eBook
Idioma:Inglés
Publicado: New York, NY : ASME Press, [2015]
Colección:Biomedical & nanomedical technologies.
Temas:
Biomedical materials.
Magnetic bearings.
Cardiovascular instruments, Implanted.
Medical technology.
Biomedical engineering.
Biomedical and Dental Materials
Prostheses and Implants
Biomedical Technology
Medical Laboratory Science
Biomatériaux.
Paliers magnétiques.
Appareils cardiovasculaires implantés.
Technologie médicale.
Génie biomédical.
biomedical engineering.
HEALTH & FITNESS > Holism.
HEALTH & FITNESS > Reference.
MEDICAL > Alternative Medicine.
MEDICAL > Atlases.
MEDICAL > Essays.
MEDICAL > Family & General Practice.
MEDICAL > Holistic Medicine.
MEDICAL > Osteopathy.
Biomedical engineering
Biomedical materials
Cardiovascular instruments, Implanted
Magnetic bearings
Medical technology
Acceso en línea:Texto completo
Tabla de Contenidos:
  • 1. Magnetic bearings for assist devices
  • 1.1 Fundamentals of magnetic bearings
  • 1.1.1 Considerations of a full magnetic suspension
  • 1.1.2 Active magnetic bearing (AMB).
  • 2. Structure of magnetic actuator
  • 2.1 Properties of magnetic materials
  • 2.2 Passive actuators
  • 2.2.1 Typical passive configuration (radial passive bearing)
  • 2.3 Active actuators
  • 2.3.1 Typical radial
  • 2.3.2 Flux biased magnetic bearings
  • 2.4 Typical configuration of hybrid actuators
  • 2.5 Electromagnetic coils
  • 2.6 System configurations
  • 2.6.1 Centrifugal vs. axial-flow configurations
  • 2.6.2 Hydrodynamically assisted suspension
  • 2.6.3 Motor assisted suspension.
  • 3. Position sensors
  • 3.1 Eddy current sensors
  • 3.2 Inductance based sensors
  • 3.3 Hall effect sensors
  • 3.4 Optical sensors
  • 3.5 Capacitive sensors
  • 3.6 Self-sensing magnetic bearings.
  • 4. Controller and electronics design
  • 4.1 Design principle of one-axis suspension
  • 4.2 Control laws
  • 4.2.1 Proportional, integral, and derivative (PID)
  • 4.2.2 Advanced control laws
  • 4.3 Hardware
  • 4.3.1 Analog-to-digital conversion and data acquisition
  • 4.3.2 Processor
  • 4.3.3 Power amplifier.
  • 5. Performance considerations of magnetic bearings in VADs
  • 5.1 System complexity
  • 5.2 Weight and size
  • 5.3 Power consumption
  • 5.4 Physical disturbance rejection
  • 5.5 Reliability and durability
  • 5.5.1 Sensor failure
  • 5.5.2 Wire and coil failure
  • 5.5.3 Controller durability
  • 5.6 Failure remediating measures
  • 5.6.1 Manufacturing
  • 5.6.2 Physical redundancy of components sensors and wires
  • 5.6.3 Fault tolerant control
  • 5.6.4 Touch-down bearings.
  • 6. Specific device examples
  • 6.1 Berlin Heart InCOR
  • 6.2 Terumo Duraheart
  • 6.3 WorldHeart Levacor
  • 6.4 PediaFlow
  • 6.5 WorldHeart MiFlow VAD
  • 6.6 Heartware HVAD and mVAD
  • 6.7 LEV-VAD
  • 6.8 MitiHeart.
  • Conclusion.

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