Simulation Study on Direct-Drive Compressor with Electromagnetic Linear Actuator
Abstract
:1. Introduction
- (1)
- Good refrigeration performance to ensure good refrigeration effect under different working conditions.
- (2)
- Greater mechanical efficiency on the basis of an existing compressor to meet the requirements of energy conservation and environmental protection.
- (3)
- Compact structure, small size, and low weight, so that installation and fixture in the limited space of the engine room are possible.
- (4)
- The compressor should run smoothly, especially in the working conditions of startup and stop, to reduce noise and vibration.
2. Structure of Direct-Drive Compressor with Electromagnetic Linear Actuator
3. Modeling of Direct-Drive Compressor with Electromagnetic Linear Actuator
3.1. Mathematical Model of the Moving-Coil Linear Motor
3.2. Parameter Design and Material Selection of the Moving-Coil Linear Motor
- (1)
- The driving force and the working stroke of the linear motor should be increased within the limited installation range;
- (2)
- The thrust performance of the linear motor should be increased to reduce fluctuation during motor operation;
- (3)
- The electromagnetic density and the magnetic circuit should be properly designed to reduce temperature rise during motor operation;
- (4)
- The mechanical efficiency and energy utilization efficiency of the motor should be increased to reduce the working energy consumption as much as possible;
- (5)
- It is necessary to meet the requirements of small size, compact structure, reliable operation, and high space utilization rate.
3.3. Mathematical Model of the Moving-Coil Linear Compressor
4. Results
4.1. Simulation Analysis of the Moving-Coil Linear Motor under Maxwell
4.2. Dynamic Simulation and Analysis of the Moving-Coil Linear Compressor under Simulink
4.2.1. Dynamic Modeling Simulation
4.2.2. Dynamic Simulation Analysis
5. Discussion and Conclusions
- Based on the analysis of the working principle of moving-coil linear compressors, a direct-drive compressor with an electromagnetic linear actuator was designed. Compared to a traditional compressor, this paper adopts the direct-drive mode of high-performance electromagnetic linear actuator, which simplifies the structure, has no friction, reduces energy consumption, realizes the miniaturization and intelligent needs of the compressor, and improves the compressor efficiency.
- The Maxwell and Simulink software were used to simulate the kinematics of the moving-coil linear compressor. The “push-to-push” control strategy was used to control the compressor current. The piston velocity displacement and electromagnetic force current exhibit periodic changes and meet the design requirements. Although the established design requirements are met, further experiments and improvements are needed in practical applications. This verifies the feasibility of a direct-drive compressor with a linear electromagnetic actuator.
- Through the method of multiple trials, a set of data could be obtained to make the compressor work continuously, and the efficiency of the linear motor could reach 80%. In future work, through employing a control algorithm, the efficiency of the linear motor and the cooling efficiency can be improved.
- Through simulation, the efficiency of the compressor under different strokes, different mover masses, different resistance and damping, different compression ratios and different piston diameters is obtained, which further verifies the feasibility of using electromagnetic actuators to directly drive compressors.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
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Item Name | Parameter Requirement |
---|---|
Rated voltage/V | 12 (V) |
Maximum current/A | 10 (A) |
Rated power/kw | 3 (kw) |
Maximum thrust/N | 450 (N) |
Maximum stroke/mm | 20 (mm) |
Structure Name | Size |
---|---|
Stator outer diameter (mm) | 84 |
Stator inner diameter (mm) | 24 |
Permanent magnet internal diameter (mm) | 38 |
Motor length (mm) | 194 |
Moving-coil length (mm) | 185 |
Parameter Name | Value |
---|---|
Promoter mass | 0.74 kg |
Piston diameter | 0.025 m |
Linear motor force constant | 40 N/A |
Intake pressure | 0.84378 MPa |
Exhaust pressure | 1.0166 MPa |
Piston stroke | 20 mm |
Self-inductance coefficient | 1.1 mH |
Coil loop resistance | 0.66 Ω |
Damping factor | 20 N·s/m |
Spring rate | 22,950 N/m |
Item Name | Material Name |
---|---|
(inner) inner magnetic yoke | Steel_1008 |
(outer) outer magnetic yoke | Steel_1008 |
(under) bottom plate | Steel_1008 |
(coil) | Cooper |
(former) coil former | Teflon |
(PM) Permanent magnet | NdFeB35 |
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Zhu, J.; Xue, M.; Dai, J.; Yang, Z.; Yang, J. Simulation Study on Direct-Drive Compressor with Electromagnetic Linear Actuator. Actuators 2023, 12, 185. https://doi.org/10.3390/act12050185
Zhu J, Xue M, Dai J, Yang Z, Yang J. Simulation Study on Direct-Drive Compressor with Electromagnetic Linear Actuator. Actuators. 2023; 12(5):185. https://doi.org/10.3390/act12050185
Chicago/Turabian StyleZhu, Jianhui, Mengmeng Xue, Jianguo Dai, Zongzheng Yang, and Jingnan Yang. 2023. "Simulation Study on Direct-Drive Compressor with Electromagnetic Linear Actuator" Actuators 12, no. 5: 185. https://doi.org/10.3390/act12050185