Fully-implanted axial-flow type blood pump driven by large air gap magnetic force and control method thereof
A magnetic drive and implantable technology, applied in the field of blood pumps, can solve the problems of not considering the control method of pump start-up, the large volume cannot be implanted in children patients, and the lack of mechanical characteristics of speed adjustment, so as to achieve a simple and reliable assembly method , Improving the degree of implantability, and the effect of fast and stable startup
Active Publication Date: 2014-07-02
CENT SOUTH UNIV
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Problems solved by technology
The method is novel, the speed adjustment lacks the understanding of the mechanical characteristics of the pump itself, and the actual implementation is complicated
[0007] From the above studies, we can see that in terms of research on blood pump design and control methods for artificial hearts, most of the artificial hearts that have been used in clinical practice have the problem of being too large to be implanted in children. Only two This is a VAD product for children, so miniaturization is an important development direction of the artificial heart; in terms of control methods, it mainly focuses on the control of steady-state speed based on human physiological parameters, and does not consider the control method of pump startup.
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Embodiment 1
[0051] Such as figure 1 As shown, the permanent magnet 5 is built into the rotating impeller 4 of the blood pump. The air gap between the permanent magnet 5 and the driving iron core stator and the delivery tube 18 is large, which is convenient for the optimal design of the blood pump flow channel. The permanent magnets 5 are consistent, and their radial and axial positions are fixed by the fixing sleeve 1 .
[0052] Such as figure 2 As shown, the driving iron core is composed of three-slot stator, three sets of driving coils and three sets of insulating layer resin. The windings are equidistant stacked windings. The insulating resin layer can prevent the direct contact between the coil and the silicon steel sheet, and avoid the coil's paint breakage and conduction. .
[0053] Such as image 3 As shown, the fixed sleeve 1 is composed of two half rings, that is, the second half fixed sleeve 17 and the first half fixed sleeve 15. The middle layer is a resin gasket 14 for ant...
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Abstract
The invention discloses a fully-implanted axial-flow type blood pump driven by large air gap magnetic force and a control method of the fully- implanted axial-flow type blood pump. A large air gap is formed between a stator and a permanent magnet; the stator comprises a stator iron core, a stator winding and an insulation layer, the stator iron core is provided with three tooth grooves symmetrically distributed in the circumferential direction of the stator, the stator winding comprises three sets of coils which are stacked on stator teeth in a full-pitch mode, and chutes are formed in the surfaces in all the stator teeth and the same in relative position and shape; the insulation layer is made of resin, and a fixing sleeve is made of material T14. Through optimization design of the stator structure, the blood pump is light in total weight, small in size, large in torque and low in temperature rise, a circuit is controlled to change currents of the three sets of coils alternately, and the N state and the S state of the stator teeth are coupled with an N pole and an S pole of the permanent magnet; a system is started without starting the winding, the structure is simple, the starting process is designed based on the motor electromagnetism and machinery-fluid dynamic characteristics of an implanted pump, and the blood pump has the advantages of being stable and rapid in acceleration and high in applicability.
Description
technical field [0001] The present invention relates to a blood pump, in particular to a fully implanted axial flow blood pump driven by large air gap magnetic force, and also relates to a control method of the fully implantable axial flow blood pump driven by large air gap magnetic force. Background technique [0002] According to the report of the World Health Organization, cardiovascular disease kills tens of millions of people every year, accounting for one-third of the global cause of death, and is the number one killer of human health. It is estimated that by 2015, there will be 20 million people worldwide every year. People die from cardiovascular disease, and heart transplantation is the only effective treatment for end-stage heart disease. The development of auxiliary blood pumps for the recovery of human heart function is mainly divided into ventricular assist device (VAD) and total artificial heart (FDA). At present, there are 5 VADs and 2 THAs in the world that h...
Claims
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Login to View More IPC IPC(8): A61M1/12
CPCA61M60/122A61M60/205A61M60/40
Inventor谭建平谭卓刘云龙
OwnerCENT SOUTH UNIV