Please use this identifier to cite or link to this item:
Study of the relationship between the magnetic force driving reciprocating pump control and the circular pipe flow rate and pressure
|Contributors: ||NTOU:Department of Systems Engineering and Naval Architecture|
left ventricular assist device(LVAD);Hall Effect component;flow meter;pressure meter;magnetic driving coil pump
|Issue Date: ||2017-11-02T09:04:09Z
|Abstract: ||本研究在探討磁驅動泵浦活塞往復運動控制與圓管內流量壓力之關係。所使用泵浦其內部為一永久磁性磁鐵組成之活塞，外部有八組以漆包線纏繞而成之線圈。線圈通電流後產生磁場與活塞磁鐵作用產生吸力或斥力，進而推動活塞運動。通過線圈的電流方向是利用單晶片執行所寫入的不同訊號時序，進一步控制連接線圈的繼電器開關電路達成。調整線圈所通之電壓/電流大小，產生不同大小之磁通量密度，進而改變推動(吸引)活塞運動作用力之大小。本研究調控每分鐘泵浦活塞往復的次數，以及往復推(吸)力的設定，測試並了解的圓管中之液體流量及壓力變化之關係。 在流道測試系統中設置流量計與壓力計，測試得知活塞的每分鐘往復運動次數是改變泵浦可推動的水流量之主要因素。驅動電壓為22 V條件下，活塞運動每分鐘30次之管流流量為0.845 L/min，活塞運動增加至每分鐘80次時，流量提高為2.316 L/min；顯示流量增加為3.185倍。在每分鐘30次的條件下，電壓13V時流量為0.746 L/min，電壓25V時流量為0.869 L/min，顯示流量提升僅至1.165倍。此外，當作用於線圈的電壓(電流)增加時，量測到的管內壓差增加，以活塞往復運動每分鐘70次為例，18V電壓下量測到的壓差為23.285 mmHg，24V電壓的壓差為27.500 mmHg，壓差增加可達4.215 mmHg。 推動水流量達2 L/min是應用於左心室輔助器之泵浦的基本要求。本研究成功推動八線圈組的往復式磁驅動泵浦，流量最高可達2.316 L/min，並驗證於驅動電壓增加時，可提供壓差增加最高達4.215 mmHg，顯示本研究之磁驅動泵浦的控制己接近輔助心臟推動血液的基本需求。此一研究發現提供給泵浦設計者參考，於未來進一步改良泵浦線圈繞線及使用更接近血液性質之液體測試，定可完成可用於左心室輔助器之泵浦。|
The relationship between the magnetic force driving reciprocating pump control and the circular pipe flow rate and pressure was studied in this research work. The eight-set coils magnetic driving reciprocal pump was adopted and there was a permanent magnet piston inside. The repulsive or attractive force would apply to the piston when the current was applied to the coils and magnetic field was produced. The forward direction or reverse current was controlled by a single-chip which was wired to a relay circuit. The on or off status of the relays was controlled by the signal sequence sent by the single-chip and can decide the current direction. Varying the current/voltage can change the magnitude of the repulsive or attractive force applied to the piston. With different reciprocal times per minutes and values of the current/voltage, the flow rate and pressure difference of the circular pipe flow was obtained. The flow and pressure meters were also set in the pipe flow system. The flow rate was increased from 0.845 to 2.316 L/min if the reciprocal cycles was risen from 30 to 80 per minute under 22 volts driving voltage. The flow rate was increased to 3.185 times. The flow rate growing was only 1.165 times when the voltage was raised from 13 V to 25 V under condition of the reciprocal cycles was 30 per minute. This showed that the main factor to affect the flow rate was the reciprocal cycles per minute. In addition, the increase of the pressure difference of the pipe can achieve 4.215 mmHg when the voltage was from 18 V to 24 V in the condition of 30 reciprocal cycles per minute. According to the experiments in this study, the driving and control method of the eight sets of coils magnetic driving reciprocal pump was successful. The pumping ability of this pump was almost met the requirement of LVAD: 2 L/min. The results can be further provided to the designer to modify the winding process of the coils, and utilizing the fluid similar to blood while testing can be helpful to improve the pump. It is believed the pump can be integrated to the LVAD in the near future.
|Appears in Collections:||[系統工程暨造船學系] 博碩士論文|
Files in This Item:
All items in NTOUR are protected by copyright, with all rights reserved.