Magnet-Segmented Blood Pump Drive for Lower Power and Heat
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Solution Overview
Problem
Conventional blood pumps consume high power due to inefficient energy usage in their driving devices, leading to increased energy consumption and heat generation.
Innovation Solution
A blood pump system with a driving device comprising a rotor and stator mechanism, where the stator generates rotating magnetic fields to drive the rotor, utilizing magnets and coils with varying cross-sectional areas to reduce power consumption and heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional driving devices are used in blood pumps, then the blood pump can operate and transfer blood, but the power consumption is high and energy efficiency is poor
Solution Approach 1:
The driving device is segmented into multiple independent magnet assemblies (first magnet assembly, second magnet assembly, third magnet assembly) arranged at different radial positions. Each assembly can be independently controlled by its own stator, allowing optimized energy distribution and reduced overall power consumption while maintaining effective blood pumping through coordinated operation of all segments.
Solution Approach 2:
The patent employs dynamic control of magnetic fields through independently controllable stators for each magnet assembly. The magnetic field strength and rotation can be dynamically adjusted based on operational requirements, enabling the system to optimize between power consumption and pumping efficiency across different working conditions.
2Temperature
If conventional driving devices are used in blood pumps, then the blood pump can transfer blood, but heat generation is increased
Solution Approach 1:
By dividing the driving device into multiple magnet assemblies with separate stators, the heat generation from each assembly is reduced compared to a single high-power assembly. The segmented structure allows better heat distribution and dissipation across the driving device, preventing localized overheating while maintaining reliable operation.
Solution Approach 2:
The patent changes operational parameters by using multiple lower-power magnet assemblies instead of one high-power assembly. This parameter change reduces the current and power density in each individual stator, thereby reducing resistive heating while maintaining the total pumping capability through coordinated operation of all assemblies.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system reduces power consumption and heat generation by optimizing the magnetic flux and torque, resulting in a more efficient and stable blood pumping operation.
Implementation Method 1
the driving stator being capable of generating a rotating magnetic field interacting with the first magnet, such that the first magnet is capable of driving the rotating shaft to rotate about the axis of the rotating shaft
Implementation Method 2
the power stator is capable of generating a rotating magnetic field that drives the second magnet to rotate
Data Source
AI summary
A blood pump (100) and a driving device thereof. The driving device (10) comprising a driving shell (11), a rotor (12) and a stator mechanism (13); the rotor (12) comprises a rotating shaft (121) and a first magnet (122), one end of the rotating shaft (121) is accommodated in the driving shell (11), and the first magnet (122) is fixedly connected with the rotating shaft (121); the stator mechanism is accommodated in the driving shell (11), the stator mechanism (13) comprises a driving stator (131), the driving stator (131) and the rotating shaft (121) are provided at intervals along the axis of the rotating shaft (121), and the driving stator (131) can generate a rotating magnetic field interacting with the first magnet (122), so that the first magnet (122) can drive the rotating shaft (121) to rotate.