Analysis and Modeling of Linear-Switched Reluctance for Medical Application
Abstract
:1. Introduction
2. Proposed Concept of the LVAD
2.1. Presentation of the Actuator
2.2. Kinetic Characteristics of the Motor
3. Dimensional Characteristics of the LVAD
3.1. Prototype Dimensions and Characteristics
Name | Abbreviation | Value (mm) |
---|---|---|
Valve radius | Rv | 12.5 |
Mover yoke thickness | emy | 2 |
Mover tooth length | hmt | 1.5 |
Air gap length | g | 0.2 |
Air gap radius | Rg | 16.1 |
Stator tooth length | hst | 9 |
Stator yoke thickness | esy | 1.5 |
External radius | Rext | 26.7 |
Tooth width | a | 2.9 |
Slot width | b | 2.9 |
Non-magnetic ring thickness | c | 1.45 |
Total length of the stator | LsT | 80 |
Total length of the mover | LmT | 140 |
Name | Abbreviation | Value |
---|---|---|
Number of phases | m | 4 |
Number of coils per phase | n | 2 |
Number of turns per slot | N | 155 |
Turn diameter | Фturn | 0.335 mm |
Slot area | Aslot = bhst | 26.1 mm² |
Coil area | Acoil = NπФturn2/4 | 13.66 mm² |
Slot fill factor | kfill = Acoil/Aslot | 52.30% |
Characteristic | Value |
---|---|
Mass of the mover | m = 270.8 g |
Static dry friction force | fs = 1.75 N |
Winding resistance (average value) | R = 8.5 Ω |
Unaligned Position inductance (average value) | Lu = 34.1 mH |
Aligned Position inductance (average value) | La = 44.6 mH |
Winding inductance (average value) | L = 39.4 mH |
Rate of change of inductance (average value) | ∆L/∆x = 10/2.9 |
3.2. Input-Output Characteristics
4. Control Principle
4.1. Open Loop Control of the Motor
4.1.1. Presentation
4.1.2. Determination of the Control Blocks
4.1.2.1. “Position to Speed” Block
4.1.2.2. “Motor Simplified Electric Motor” Block
4.1.2.3. “Current Signal Generator” Block
4.1.2.4. “Speed to Force” Block
4.1.3. Modeling of the Motor with Matlab Simulink
4.1.3.1. Principle of Modeling
4.1.3.2. Electrical Modeling of the Motor
4.1.3.3. Mechanical Modeling of the Motor
−a < x < -a/2 | −a/2 < x < 0 | 0 < x < a/2 | a/2 < x < a | a < x < 3a/2 | 3a/2 < x < 2a | |
---|---|---|---|---|---|---|
g1(x) | −10/2.9 | −10/2.9 | 10/2.9 | 10/2.9 | −10/2.9 | −10/2.9 |
g2(x) | 10/2.9 | −10/2.9 | −10/2.9 | 10/2.9 | 10/2.9 | −10/2.9 |
g3(x) | 10/2.9 | 10/2.9 | −10/2.9 | -10/2.9 | 10/2.9 | 10/2.9 |
g4(x) | −10/2.9 | 10/2.9 | 10/2.9 | -10/2.9 | −10/2.9 | 10/2.9 |
4.1.4. Results of the Open Loop Control
4.2. Closed Loop Control of the Motor
5. Conclusions
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Llibre, J.-F.; Martinez, N.; Leprince, P.; Nogarede, B. Analysis and Modeling of Linear-Switched Reluctance for Medical Application. Actuators 2013, 2, 27-44. https://doi.org/10.3390/act2020027
Llibre J-F, Martinez N, Leprince P, Nogarede B. Analysis and Modeling of Linear-Switched Reluctance for Medical Application. Actuators. 2013; 2(2):27-44. https://doi.org/10.3390/act2020027
Chicago/Turabian StyleLlibre, Jean-Francois, Nicolas Martinez, Pascal Leprince, and Bertrand Nogarede. 2013. "Analysis and Modeling of Linear-Switched Reluctance for Medical Application" Actuators 2, no. 2: 27-44. https://doi.org/10.3390/act2020027