Investigation of Characteristics of a Novel Torque Motor Based on an Annulus Air Gap

Meng, Bin; Dai, Mingjun; Zhu, Chenhang; Xu, Hao; Jia, Wenang; Li, Sheng

doi:10.3390/machines9070131

Cited by 6 publications

(4 citation statements)

References 35 publications

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“…By varying the voltage amplitude of the torque motor, different displacements of the valve spool can be obtained. Meng B et al [102,103] proposed a new torque motor based on an annular air gap. One end of the spool is a high-pressure chamber, and the other end is a sensitive chamber.…”

Section: Torque Motorsmentioning

confidence: 99%

Review of Recent Advances in the Drive Method of Hydraulic Control Valve

Li,

Yang

et al. 2023

Processes

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Hydraulic control valves are widely used in industrial production, agricultural equipment, construction machinery, and other large power equipment for controlling the pressure and flow of fluids in hydraulic systems. The driving method has a significant impact on the response and control accuracy of hydraulic valves. This paper reviews the driving methods of spools from five aspects: solenoid drive, material expansion drive, motor drive, hydraulic valve drive, and another drive. It summarizes the various schemes currently available for spool drive and analyzes each of them. After optimizing the driving method of the valve core, the control accuracy can reach 3%, and the minimum response time is 7 ms. According to the characteristics of the different drive methods, the differences between them are compared, the advantages and disadvantages of each drive method are analyzed, and the application scenarios for each drive method are identified. Solutions to the drawbacks of the existing drive methods are proposed, which provide directions for further optimization. We have found that solenoid drives are simple to control, low cost, and the most widely used. Material telescopic drives, motor drives, hydraulic valve drives, and other drives are costly, complex to control, and optional for use in special requirement situations. Based on the existing spool drive methods, an outlook on future drive methods is presented. This review facilitates a comprehensive understanding of the drive methods of hydraulic valve spools, points out the shortcomings of the existing drive methods, and is of great significance in improving the existing drive methods and proposing new drive methods. This paper has a positive effect on improving the control accuracy and responsiveness of hydraulic valves.

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Section: Torque Motorsmentioning

confidence: 99%

Review of Recent Advances in the Drive Method of Hydraulic Control Valve

Li,

Yang

et al. 2023

Processes

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“…The response surface model is established based on equation (16). Crucial structural parameters including the thickness of the permanent magnet l 1 , the width of the armature pole shoe surface l 2 , the length of by-pass air gap g 2 , the distance between armature and tip of basin edge d 1 and the angle of basin edge u are selected out to perform experiment design.…”

Section: Experiments Designmentioning

confidence: 99%

“…Compared with the traditional servo valve, it has features of no pilot level leakage, simple structure, high degree of intelligence and good working stability. [14][15][16] Therefore, it begins to replace traditional servo valves and is gradually applied to aviation aircraft, injection and blow molding equipment, paper industry, wood treatment and other civil fields.…”

Section: Introductionmentioning

confidence: 99%

Novel modulation approach of flat force–displacement characteristic of linear electro-mechanical converter for electro-hydraulic servo-proportional valve

Meng

Heng

Sheng

2022

Proceedings of the Institution of Mechanical Engineers, Part I:

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Flat force–displacement characteristic has crucial influence on the performance of linear electro-mechanical converter of electro-hydraulic servo-proportional valves. The commercial proportional solenoids obtain such features by welding a non-magnetic separator ring, which is complicated and time-consuming. This article presents a novel modulation approach to obtain the flat force–displacement characteristic of linear electro-mechanical converter by constructing a by-pass air gap. Taking an existing linear force motor as an example, the force–displacement characteristic curves of the linear force motor with by-pass air gap and without by-pass air gap are both studied using magnetic circuit analysis and finite element method under different excitation currents. Based on the finite element method simulated data, the response surface method is used to perform the experiment design for structure parameters of linear force motor with by-pass air gap, and the quadratic fitting equations are obtained for further optimization. To balance conflicted design objectives such as linearity, mean value of output force and power-to-weight ratio, the structural parameters of the linear force motor with by-pass air gap are optimized using a multi-objective optimization algorithm based on particle swarm. Prototypes of linear force motor with by-pass air gap and without by-pass air gap are both manufactured, and a special test rig is built. The static and dynamic experimental results are consistent with the theoretical analysis. The former proves that the linear force motor with by-pass air gap can obtain a nearly flat force–displacement curve with reasonable parameter optimization and also improve output force, and the latter reveals that a linear electro-mechanical converter with flat–displacement characteristic has better working stability over common ones. The proposed modulation approach provides a new approach for the design of flat force–displacement characteristic of linear electro-mechanical converter.

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“…Ref. [19] proposed a novel torque motor based on annular air gap to replace the negative feedback function of the spiral groove. In order to optimise its output performance, the key structural parameters are selected through orthogonal experiments, and their parameters are optimised through back‐propagation neural network and genetic algorithm.…”

Section: Introductionmentioning

confidence: 99%

Claw‐pole magnetic levitation torque motor for 2D valve with automatic neutral adjustment

Huang

Song

Sheng

et al. 2023

IET Electric Power Appl

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In order to solve the problems of complex structure and the difficulty of neutral adjustment of the existing 2D valve electro‐mechanical converter, a kind of claw pole magnetic levitation torque motor (CPMLTM) was proposed, which automatically suspended the rotor in an axially and circumferentially neutral position by using the cogging torque and axial recovery forces between the stator claw pole and the rotor permanent magnet (PM). Compared with the conventional moving iron torque motor, it has positive magnetic stiffness, 1.54 times higher PM utilisation and 33.6% lower mass. A qualitative mathematical model of output torque is derived based on equivalent magnetic circuit model. Then, the response surface method was used to build the second‐order response surface model, and NSGA‐2 was used to optimise the design of five key structural parameters, and the non‐inferior solution sets satisfying the maximisation of the cogging torque, output torque and axial recovery force were obtained. The experimental prototype was developed, and static experiments were carried out on the experimental rigs. The results show that the relationship between the input current and the output angular displacement of the CPMLTM is linearly proportional when the magnetomotive force generated by the coil winding is from −50 to 50 A.

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Investigation of Characteristics of a Novel Torque Motor Based on an Annulus Air Gap

Cited by 6 publications

References 35 publications

Review of Recent Advances in the Drive Method of Hydraulic Control Valve

Review of Recent Advances in the Drive Method of Hydraulic Control Valve

Novel modulation approach of flat force–displacement characteristic of linear electro-mechanical converter for electro-hydraulic servo-proportional valve

Claw‐pole magnetic levitation torque motor for 2D valve with automatic neutral adjustment

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