Flux Field Formulation and Back-Iron Analysis of Tubular Linear Machines

Yan, Liang; Hu, Jie; Yao, Nan; Zhang, Jiao; Chen, I‐Ming; Lee, Kok-Meng

doi:10.1109/tmag.2012.2199997

Cited by 9 publications

(2 citation statements)

References 25 publications

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“…The ferromagnetic material is one of the key components that affect the magnetic field, and thus the output performance, significantly. 28 The spool (without the armature) is ignored because it is made of special material which cannot be magnetized. A step voltage of 12 V, which reaches a peak within 0.001 s, is loaded into the coils.…”

Section: Valve Modelmentioning

confidence: 99%

Non-linear dynamic modelling of a switching valve driven by pulse width modulation in the hydraulic braking system of a vehicle

Gao

Yang

Zhao

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part D:

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Fast-switching valves driven by puse width modulation have been widely used in the hydraulic braking systems (such as anti-lock braking systems or electric stability control systems) of vehicles, because of their lower cost and their functions which are similar to those of proportional valves. However, proportional valves have been widely investigated, whereas there is significantly less literature on the switching valves of the hydraulic control units in the braking systems of vehicles. In order to investigate the controllability of pressure, construction of an accurate theoretical model is the key to attaining this. Based on theoretical analysis and finite element analysis, this paper presents a non-linear dynamics model of a typical fast-switching valve. The non-linear model is composed of three submodels: a mechanical submodel, an electromagnetic submodel and a fluid dynamics submodel. The fluid momentum theorem combined with the simulation curve-fitting method is used to model accurately the fluid dynamics which are due to the varying flow field. The hydraulic force acting on the spool can be obtained directly from this model. Finally, the feasibility of the response time and the pressurization performance of the non-linear dynamics model is proved by comparing the simulation results from MATLAB/Simulink with the experimental results obtained on a test bench. The study shows that the model can be regarded as a predictive tool for future investigation.

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Section: Valve Modelmentioning

confidence: 99%

Non-linear dynamic modelling of a switching valve driven by pulse width modulation in the hydraulic braking system of a vehicle

Gao

Yang

Zhao

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part D:

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show abstract

“…However, special shaped magnets are difficult to fabricate and magnetizing, making this design unavailable in practice. We have also conducted innovative attempts such as dual Halbach array [14][15][16], which lays the foundation of this work.…”

mentioning

confidence: 99%

Design and analysis of an improved Halbach tubular linear motor with non-ferromagnetic mover tube for direct-driven EHA

Wang

Zhang

Yan

et al. 2014

Proceedings of 2014 IEEE Chinese Guidance, Navigation and Control Conference

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Direct-driven Electrical Hydrostatic Actuator (D-EHA) is a novel actuator for large aircraft Power-By-Wire (PBW) system. Achieving high dynamic response is an important task for D-EHA. In this paper, a tubular oscillating motor with improved Halbach array and non-ferromagnetic mover tube is proposed for high-dynamic system. Its structure and operating principle is first clarified. Then, focusing on the novel magnet array, analytical modelling is put forward and validated by FEM simulation. Comparisons with common used quasi-Halbach design over flux distribution, flux density and thrust are conducted. The results indicate that this novel magnet design has superior thrust and dynamic performance over traditional ones, especially for oscillating motor with relatively small stroke.

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