Studies have shown that failure of the cardiovascular system is one of the most common health disorders causing premature deaths in our society. Heart transplantation is the last option for those patients who suffer from heart diseases. Artificial heart pumps are good candidates for implantable ventricular assist systems that can solve the problem of deficiency in the number of available organ donors. One of the key technologies of our rotary heart pump is the design of a rotor that is magnetically suspended by two hybrid magnetic bearings (HMBs) and driven by a Lorentz-type motor. The HMBs will help to eliminate mechanical contact, which leads to material wear, red blood cell damage, heat generation, platelet aggregation, thrombus growth, and even pump failure. Therefore, artificial heart pumps supported by magnetic bearings have been widely employed [1–9]. Yamane et al. [5] and Yuhki et al. [6] developed a centrifugal blood pump with pivot bearings to suspend an impeller. Akamatsu et al. [7] and Nojiri et al. [8] reported a blood pump whose impeller was levitated by an axial magnetic bearing; however, their magnetically coupled motor-shaft to drive the impeller was supported by ball bearings. There are mainly two types of blood pumps, namely, centrifugal and axial-flow types. Due to their better anatomical fit, axial-flow blood pumps are preferred [4]. In this chapter, a fully magnetically levitated axial-flow blood pump is developed using two 5-degree-of-freedom (DOF) controlled HMBs. Proportional-integral-derivative controllers (PID controllers) are used to control the proposed HMBs. The proposed Lorentz-type motor drives the rotor in sensorless mode using STMicroelectronics’s ST7FMC microcontroller. In this system, the rotor can rotate with speeds of up to 14,000 revolutions per minute (rpm) in stable suspension. This chapter describes the development of the HMBs system of the axial-flow blood pump, including its design, principles, control, and performance.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
J. Asama, T. Shinshi, S. Takatani, L. Li, and A. Shimokohbe (2003) A compact magnetic bearing system for centrifugal ventricular assist devices. Proceedings of the 7th International Symposium on Magnetic Suspension Technology, pp. 117-122.
J. Asama, T. Shinshi, H. Hoshi, S. Takatani, and A. Shimokohbe (2004) A new design for a compact centrifugal blood pump with a magnetically levitated rotor. ASAIO Journal 2004, 50: 550-556.
H. Hoshi, J. Asama, T. Shinshi, S. Takatani, K. Ohuchi, M. Nakamura, T. Mizuno, H. Arai, and A. Shimokohbe (2005) Disposable magnetically levitated centrifugal blood pump: design and in vitro performance. Artificial Organs, 29(7): 520-526.
T.M. Lim and D.S. Zhang (2005) Numerical analysis of blood trauma in an enclosed-impeller axial flow pump. 13th Congress of the International Society for Rotary Blood Pumps, Tokyo, Japan.
T. Yamane, M. Nishida, T. Kijima, and J. Maekawa (1997) New mechanism to reduce the size of the monopivot magnetic suspension blood pump. Artificial Organs, 21: 620-624.
A. Yuhki, M. Nogawa, and S. Takatani (2000) Development of a compact, sealless, tripod supported, magnetically driven centrifugal blood pump. Artificial Organs, 24: 501-505.
T. Akamatsu, T. Tsukiya, K. Nishimura, P. Chang-Hee, and T. Nakazeki (1995) Recent studies of the centrifugal blood pumps with a magnetically suspended impeller. Artificial Organs, 19: 631-634.
C. Nojiri, T. Kijima, J. Maekawa, K. Horiuchi, T. Kido, T. Sugiyama, T. Mori, N. Sugiura,T. Asada, W. Umemura, T. Ozaki, M. Suzuki, T. Akamatsu, S. Westaby, T. Katsumata, and S. Saito (2001) Development status of Terumo implantable left ventricular assist system. Artificial Organs, 25: 411-413.
T.M. Lim and D. Zhang (2006) Development of Lorentz force type self-bearing motor for an alternative axial flow blood pump design. Artificial Organs, 30: 347-353.
L.P. Chua, B.Y. Su, T.M. Lim, and T.M. Zhou (2007) Numerical simulation of an axial blood pump. Accepted by Artificial Organs.
SoftTec Microsystems (2000) AK-ST7FMC Starter kit for STMicroelectronics ST7FMC motor control device user’s manual, Revision 1.0.
T.M. Lim and Shanbao Cheng (2005) Parameter estimation of one-axis magnetically suspended system with a Digital PID controller. 1st International Conference on Sensing Technology, Nov. 21-23, Palmerston North, New Zealand, pp. 419-424.
T.M. Lim and S. Cheng (2007) Parameter estimation and statistical analysis on frequencydependent active control forces. Mechanical Systems and Signal Processing, 21(5): 2112-2124.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2008 Springer Science+Business Media, LLC
About this chapter
Cite this chapter
Meng, L.T., Shanbao, C. (2008). Development of Hybrid Magnetic Bearings System for Axial-Flow Blood Pump. In: Chan, A.H.S., Ao, SI. (eds) Advances in Industrial Engineering and Operations Research. Lecture Notes in Electrical Engineering, vol 5. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-74905-1_28
Download citation
DOI: https://doi.org/10.1007/978-0-387-74905-1_28
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-387-74903-7
Online ISBN: 978-0-387-74905-1
eBook Packages: Business and EconomicsBusiness and Management (R0)