Development of a new moving magnet linear compressor. Part A: Design and modeling

Bijanzad, Armin; Hassan, Adnan; Lazoğlu, İsmail; Kerpiççi, Hüsnü

doi:10.1016/j.ijrefrig.2020.02.011

Cited by 16 publications

(8 citation statements)

References 15 publications

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“…The piston is connected to the piston rod, the other end of which is connected with the promoter of the linear motor by fasteners. A 3D model is shown in Figure 2 [13]. In a linear compressor, the cylinder block is an important structure for compressing refrigerants.…”

Section: Structure Of Direct-drive Compressor With Electromagnetic Li...mentioning

confidence: 99%

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Simulation Study on Direct-Drive Compressor with Electromagnetic Linear Actuator

et al. 2023

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In order to enhance compressor efficiency and meet the requirements of energy conservation and environmental protection, this study designed a direct-drive compressor with an electromagnetic linear actuator. Starting with the structural design and performance analysis of the linear compressor, the working process of the moving-coil linear compressor was analyzed. The basic performance of the designed moving-coil linear motor was simulated and analyzed using the Maxwell software, while the overall performance of the linear compressor was simulated and analyzed using the Simulink software to verify the feasibility of controlling a linear compressor via the direct drive of a linear motor.

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Section: Structure Of Direct-drive Compressor With Electromagnetic Li...mentioning

confidence: 99%

“…The piston is connected to the piston rod, the other end of which is connected with the promoter of the linear motor by fasteners. A 3D model is shown in Figure 2 [13].…”

Section: Structure Of Direct-drive Compressor With Electromagnetic Li...mentioning

confidence: 99%

Simulation Study on Direct-Drive Compressor with Electromagnetic Linear Actuator

et al. 2023

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“…Operation at resonance are achieved by exciting the coil at mechanical resonance frequency. At resonance frequency, very less electromagnetic force is needed to perform its operation [24]. Furthermore, minimum electric current is passed through coil, which yields minimum ohmic loses.…”

Section: Resonancementioning

confidence: 99%

“…Moreover, LOAs works on a resonance frequency, that can be picked on the basis of mover mass and spring constant. At this frequency moving part (mover) requires lesser amount of electromagnetic thrust force [5]. Stator, static part of the LOA yield controlled electromagnetic field and mover adjust its position to provide least reluctance path to magnetic flux.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of a Novel Outer Mover Moving Magnet Linear Oscillating Actuator for a Refrigeration System

et al. 2021

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This article presents linear oscillating actuator (LOA) which generates bidirectional linear thrust force. Design topology of the proposed LOA contains an outer mover and an inner stator design. Two axially magnetized and tubular-shaped permanent magnets (PMs) are mounted on the mover. Due to the higher magnetic flux density of axially magnetized PMs in a specific direction, it generates higher thrust force than radially magnetized PMs. The proposed LOA operates on single-phase alternating source. All the design specifications of the LOA are optimized through finite element method (FEM) and optimum values of the design parameters are obtained. Output parameters such as the stroke length and thrust force are analyzed for multiple magnitudes of the input parameters such as current using FEM. Additionally, Other parameters like back emf, coil current and winding resistance are analyzed at resonance. Effect of motor constant is investigated toward both directions of the force, which show identical replication. Output parameters of the LOA are compared with already designed topologies of the LOA for refrigeration system. Proposed LOA demonstrates promising improvements in terms of motor constant and thrust force compared to the volume of the LOA. Moreover, proposed LOA is comparatively convenient to fabricate as well.

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“…However, part load results have not been reported that could be compared to the present rectangular design. A moving magnet design was also proposed by Bijanzad et al [34,35], who demonstrated that the motor efficiency approached 89% when operated under low load condition using nitrogen as working fluid. However, motor efficiency decreased from 0.79 to 0.7 with input power increasing from 30 to 50 W using R600 as working fluid.…”

Section: Comparisons With Other Moving Magnet Linear Motorsmentioning

confidence: 99%

Modelling and Measurement of a Moving Magnet Linear Motor for Linear Compressor

Chen

Jiang

et al. 2020

Energies

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For the purpose of efficiency improvement, a linear motor that performs a linear reciprocating motion can be employed to directly drive the piston in a reciprocating refrigeration compressor without crankshaft mechanism. This also facilitates the modulation of cooling capacity as the stroke and frequency can be readily varied in response to heat load. A novel design of moving magnet linear motor for linear compressor was analyzed in the paper. A finite element analysis (FEA) model was built to simulate the characteristics of the linear motor. Current and displacement signals were measured from a test rig and were defined in the transient FEA model. Transient motor force was simulated with the FEA model and good agreements are shown between the results from the FEA model and interpolated shaft force from static force measurements. Major Losses, such as copper loss and core loss were also computed. Motor efficiency decreased from 0.88 to 0.83 as stroke increased from 9 mm to 12 mm, while the pressure ratio remained unchanged. Comparisons were made between the present moving magnet linear motor and moving coil linear motors. Generally, the moving magnet linear motor demonstrates higher efficiency than moving coil motors, which have significantly higher copper loss. The present moving magnet design with simple structure could be further optimized to improve motor efficiency.

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Development of a new moving magnet linear compressor. Part A: Design and modeling

Cited by 16 publications

References 15 publications

Simulation Study on Direct-Drive Compressor with Electromagnetic Linear Actuator

Simulation Study on Direct-Drive Compressor with Electromagnetic Linear Actuator

Analysis and Design of a Novel Outer Mover Moving Magnet Linear Oscillating Actuator for a Refrigeration System

Modelling and Measurement of a Moving Magnet Linear Motor for Linear Compressor

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