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CN-224218153-U - LVAD motor stator system and LVAD motor

CN224218153UCN 224218153 UCN224218153 UCN 224218153UCN-224218153-U

Abstract

The utility model belongs to the technical field of artificial heart-left ventricle auxiliary circulation equipment, and particularly discloses an LVAD motor stator system which comprises an outer stator, an inner stator and windings arranged between the outer stator and the inner stator, wherein the inner stator is formed by stacking a plurality of silicon steel ring sheets, axial modulation grooves are formed along the inner circumference of the inner stator, and the modulation grooves are positioned in the middle of adjacent embedding grooves. The utility model also discloses a motor, epoxy resin is filled in the motor, so that the relative positions of related components are ensured, the coaxiality and dynamic balance of the related components are ensured, the motor runs stably at a high speed, vibration can be reduced, the motor has good biosafety, high heat conductivity coefficient and chemical stability, and the motor dissipates heat rapidly when running at a high speed, so that the motor is suitable for being arranged in a human body.

Inventors

  • LIANG XING
  • BAO MINGZE
  • LIU XING
  • ZHOU CHUANXING

Assignees

  • 重庆永仁心医疗器械有限公司

Dates

Publication Date
20260508
Application Date
20250515

Claims (8)

  1. 1. The LVAD motor stator system is characterized by comprising an outer stator (1), an inner stator (2) and a winding (3) arranged between the outer stator (1) and the inner stator (2), wherein the inner stator (2) is formed by stacking a plurality of silicon steel ring sheets (21), a plurality of embedded grooves (24) are circumferentially arranged at intervals along the outer side of the inner stator (2), axial modulation grooves (22) are circumferentially arranged along the inner side of the inner stator (2), and the modulation grooves (22) are positioned in the middle of adjacent embedded grooves (24).
  2. 2. The LVAD motor stator system of claim 1 wherein the modulation slots (22) have a cross-sectional profile that is one of rectangular, semi-circular, and triangular.
  3. 3. LVAD motor stator system according to claim 1 or 2, characterized in that the silicon steel ring plates (21) are provided with positioning holes (211) at intervals in the circumferential direction.
  4. 4. LVAD motor stator system according to claim 1 or 2, characterized in that the winding (3) comprises a frame (31) and a coil (32), the coil (32) is wound on the frame (31) separately, and the winding (3) adopts a star connection mode.
  5. 5. A LVAD motor stator system according to claim 3, characterized in that the winding (3) comprises a frame (31) and a coil (32), the coil (32) being wound around the frame (31), the winding (3) being connected in a star-like manner.
  6. 6. A LVAD motor comprising a stator system of the LVAD motor of any one of claims 1-5, further comprising a rotor system (4), the rotor system (4) being arranged in the stator system.
  7. 7. The LVAD motor of claim 6, wherein the rotor system (4) comprises a rotor support (41), a neodymium-iron-boron permanent magnet (42), a rotor ring (43) and a rotor cover plate (44), the rotor support (41) is coaxially installed inside the inner stator (2), the neodymium-iron-boron permanent magnet (42) is fixed on the periphery of the rotor support (41), the rotor ring (43) is tightly installed on the radially inner side of the neodymium-iron-boron permanent magnet (42), and the rotor cover plate (44) is arranged at the bottom of the rotor support (41).
  8. 8. LVAD motor according to claim 6 or 7, characterized in that the rotor system (4) and the stator system are vacuum encapsulated with epoxy.

Description

LVAD motor stator system and LVAD motor Technical Field The utility model belongs to the technical field of artificial heart-left ventricle auxiliary circulation equipment, and particularly relates to a LVAD motor stator system and a LVAD motor. Background Left heart assist devices (LeftVentricularAssistDevice, LVAD for short) of artificial hearts are devices used in the common treatment of advanced heart failure, which are small devices connected to the heart that mechanically draw blood from the left ventricle and deliver it to the aorta, thereby relieving the left ventricle of the burden and helping the heart pump oxygen-enriched blood throughout the body. The LVAD mainly comprises an inflow pipeline, a pump system, an outflow pipeline, a transmission system, an external controller and the like, wherein the transmission system provides power for the LVAD, and the transmission system core is an LVAD motor. Because the LVAD motor is arranged in a human body, the smaller the volume is, the better the volume is, the smaller the volume of a stator serving as a basic magnetic circuit of the LVAD motor is required, and then stator tooth grooves with limited quantity and limited size can be arranged on the stator, so that the problems of higher harmonic amplitude, large motor torque fluctuation, unstable motor operation and the like in the operation of the LVAD motor can be caused. Disclosure of utility model The utility model aims to provide a LVAD motor stator system which can effectively inhibit higher harmonic waves, reduce torque fluctuation and ensure stable motor operation. The utility model aims at realizing the technical scheme, and particularly provides an LVAD motor stator system which comprises an outer stator, an inner stator and windings arranged between the outer stator and the inner stator, wherein the inner stator is formed by stacking a plurality of silicon steel ring sheets, a plurality of embedded grooves are circumferentially arranged along the outer side of the inner stator at intervals, axial modulation grooves are circumferentially arranged along the inner side of the inner stator, and the modulation grooves are positioned in the middle of adjacent embedded grooves. Preferably, the cross-sectional profile of the modulation groove is one of rectangular, semicircular and triangular. Preferably, the silicon steel ring sheets are provided with positioning holes at intervals along the circumferential direction. Preferably, the winding comprises a framework and a coil, the coil is wound on the framework, and the winding adopts a star connection mode. Due to the adoption of the technical scheme, the utility model has the following advantages: The axial modulation groove is added on the surface of the stator, so that the change frequency of the positioning torque can be increased in the rotation period of the motor, the number of harmonic waves which are mainly acted by the motor is increased, and harmonic components can be reduced, thereby effectively inhibiting higher harmonic waves and reducing torque fluctuation. An LVAD motor comprises a stator system and a rotor system, wherein the rotor system is arranged in the stator system. Preferably, the rotor system comprises a rotor support, neodymium-iron-boron permanent magnets, a rotor ring and a rotor cover plate, wherein the rotor support is coaxially arranged inside the inner stator, the neodymium-iron-boron permanent magnets are fixed on the periphery of the rotor support, the rotor ring is closely arranged on the radial inner side of the neodymium-iron-boron permanent magnets, and the rotor cover plate is arranged at the bottom of the rotor support. Preferably, the rotor system and the stator system are vacuum potted with epoxy. Due to the adoption of the technical scheme, the utility model has the following advantages: The motor comprises a stator system provided with a modulation groove, so that higher harmonic waves are restrained, torque fluctuation is reduced, and the control characteristic of the motor is improved. Drawings In order to more clearly illustrate the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale. FIG. 1 is a schematic diagram of a stator system of an LVAD motor according to the present utility model; FIG. 2 is a schematic view of an inner stator; FIG. 3 is a schematic diagram of a winding; FIG. 4 is a schematic diagram of the structure of an LVAD motor; fig. 5 is a schematic diagram of the UVW leads of the winding. Reference numerals: 1-an outer stator and 11-an outer stator positioning hole; 2-inner stator, 21-silicon steel ring piece, 211-positioning hole, 22-modulation groove, 23-magnetic yoke, 24-wire embedding groove and 241-notch; 3-winding, 31-framework and 32-coil; 4-rotor system, 41-rotor support, 42-neodymium iron boron permanent magnet, 43