Title:
DRIVE CONTROL METHOD FOR MAGNETICALLY LEVITATED BLOODFLOW PUMP, DRIVE CONTROL DEVICE FOR MAGNETICALLY LEVITATED BLOODFLOW PUMP, AND MAGNETICALLY LEVITATED BLOODFLOW PUMP SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/199602
Kind Code:
A1
Abstract:
The present invention provides a drive control method for a magnetically levitated bloodflow pump, a drive control device for a magnetically levitated bloodflow pump, and a magnetically levitated bloodflow pump system with which it is possible to reliably sense the position of a thrombus from the phase difference Δφ between the phase of an electromagnet current waveform and the phase of impeller displacement (phase of a vibration waveform) without depending on blood temperature or viscosity μ, and prevent thrombus formation in a housing. This drive control device 30 comprises: a rotation drive control unit 31 functioning as a rotation drive control means for causing, in a magnetically levitated bloodflow pump 20 provided with an electric motor 24 for turning an impeller 23 in a housing 22 by means of a magnetic coupling force in a z-axis direction in a state in which the impeller 23 is magnetically levitated by magnetic levitation electromagnets 25X, 25Y, the impeller 23 to rotate; and a revolution drive control unit 32 functioning as a revolution drive control means for moving the center of rotation of the impeller 23 so as to draw an orbital trajectory moved in the radial direction, and causing the impeller 23 to revolve. The drive control device 30 causes the impeller 23 to rotate as well as revolve in the housing 22.
Inventors:
HIJIKATA WATARU (JP)
HATAKENAKA KOHEI (JP)
FUJIWARA TATSUKI (JP)
OHUCHI KATSUHIRO (JP)
ARAI HIROKUNI (JP)
MIZUNO TOMOHIRO (JP)
INOUE YUSUKE (JP)
TAKEWA YOSHIAKI (JP)
HATAKENAKA KOHEI (JP)
FUJIWARA TATSUKI (JP)
OHUCHI KATSUHIRO (JP)
ARAI HIROKUNI (JP)
MIZUNO TOMOHIRO (JP)
INOUE YUSUKE (JP)
TAKEWA YOSHIAKI (JP)
Application Number:
PCT/JP2023/006133
Publication Date:
October 19, 2023
Filing Date:
February 21, 2023
Export Citation:
Assignee:
TOKYO INST TECH (JP)
UNIV NAT CORP TOKYO MEDICAL & DENTAL (JP)
NATIONAL UNIV CORPORATION ASAHIKAWA MEDICAL UNIV (JP)
UNIV NAT CORP TOKYO MEDICAL & DENTAL (JP)
NATIONAL UNIV CORPORATION ASAHIKAWA MEDICAL UNIV (JP)
International Classes:
A61M60/822; A61M60/113; A61M60/117; A61M60/232; A61M60/38; A61M60/419; A61M60/508; A61M60/804; F04D29/048; F16C32/04
Foreign References:
| JP2007044302A | 2007-02-22 | |||
| JP2002345787A | 2002-12-03 | |||
| JPS63263290A | 1988-10-31 | |||
| JP2020139484A | 2020-09-03 |
Attorney, Agent or Firm:
KOIKE Akira et al. (JP)
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