Design of a frictional–electromagnetic compound disk brake for automotives

Huang, Shaofeng; Bao, Jiusheng; Ge, Shirong; Yin, Yajun; Liu, Tonggang

doi:10.1177/0954407019864210

Cited by 6 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…He et al [13] utilized the power bond diagram method to establish a non-linear coupling mathematical model of the integrated system of electromagnetic brake and friction brake, and through experiments to validate the accuracy of the nonlinear coupling mathematical model, provides theoretical guidance for the design of electromagnetic friction brakes. Huang et al [14] through the friction-braking compound experiment verified that friction braking torque accounts for more than 90% of the friction braking torque in the electromagnetic friction braking device. Choi et al [15] utilized the finite element method (FEM) to analyze the frictional heat contact problem during the braking process of disc brakes, and obtained the temperature distribution of the friction disc surface under different braking loads.…”

Section: Introductionmentioning

confidence: 99%

Analysis of electromagnetic-thermal coupling braking properties of combined electromagnetic friction and shape memory alloy brake

Gong¹,

Xiong²,

Huang³

2022

Smart Mater. Struct.

View full text Add to dashboard Cite

To address the problems of severe heat generation and poor stability of traditional electromagnetic friction brakes, combined electromagnetic friction and shape memory alloy braking method is proposed. This novel brake solves the traditional electric brake thermal decay problem based on the temperature sensing ability of shape memory alloy, which improves its working stability in a high-temperature environment. Based on Ampere's law of magnetic field, the relationship between current and electromagnetic force was established, and the equation of electromagnetic force braking torque was derived. Based on the thermodynamic model of a shape memory alloy, the relationship between the frictional torque of shape memory alloy and parameters such as temperature, squeezing pressure, and structure size was established. The magnetic and thermal fields of this brake were analyzed by the finite element method to obtain the magnetic field distribution and the magnitude of electromagnetic force at different currents and to derive the temperature distribution of the brake at different currents. The brake was analyzed by the shape memory alloy squeezing pressure test platform and the braking performance test platform. The results show that the electromagnetic torque grows non-linearly with temperature, and the squeezing force generated by the shape memory alloy spring increases with temperature. When the current is 0.7A, the braking torque generated by electromagnetism is 170.3N·m, while the maximum braking torque generated by the combination of electromagnetism and shape memory alloy is 212.6N·m, which is 20.4% higher than that of the traditional electromagnetic friction brake. This novel brake improves braking performance and ensures stable braking performance under temperature rise.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of electromagnetic-thermal coupling braking properties of combined electromagnetic friction and shape memory alloy brake

Gong¹,

Xiong²,

Huang³

2022

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…Huang et al demonstrated that EDCs may also be utilized in automotive powertrains, where they can be used as a flexible link between the wheel hub and motor for high levels of comfort and smooth power transmission [8,9]. A fractional electromagnetic compound disk brake is another application of electromagnetic actuators, and it demonstrates favorable braking performance [10]. Medei [11] studied the implementation of a passive decoupler to isolate vibrations exchanged between the crankshaft and the FEAD.…”

Section: Introductionmentioning

confidence: 99%

Active Electromagnetic Clutch for Crankshaft Decoupling from a Belt Drive System

Castellanos Molina,

Galluzzi,

Hegde

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

This work presents a novel electromagnetic clutch installed on the crankshaft pulley to decouple the internal combustion engine from the front-end accessory drive of a P0 hybrid electric vehicle. The objective is to supply the air conditioning compressor directly with the belt starter–generator electric machine without dragging the inertia of the engine during engine fuel cut-off phases. This operation yields an improved vehicle energetic efficiency and allows for uninterrupted air conditioning also when the start–stop function is activated. This paper focuses on the mechanical assembly and electromagnetic behavior of the device. Furthermore, two position-sensorless techniques are proposed to estimate the clutch state. The effectiveness of the proposed solution is experimentally validated on a dedicated test bench. Experimental tests demonstrated that the opening and closing phases required 50 and 25ms, respectively, thereby satisfying the time constraints for switching different operating modes in a vehicle (∼100ms).

show abstract

“…In [2,3] and concepts are presented in which the eddy 40 current brake and the friction brake are operated locally separately. In other concepts [4,5], 41 additional excitation poles are positioned on the brake disk to generate eddy currents and 42 thus a wear-free portion of the braking torque. All these concepts generate the frictional 43 torque via a classic brake caliper.…”

Section: Introductionmentioning

confidence: 99%

The Hybrid Brake Model and Its Validation

et al. 2023

View full text Add to dashboard Cite

As an extension of a paper published at the 24th International Conference on Mechatronics Technology, ICMT 2021 conference, this paper shows the concept, design method, and model of a hybrid brake with additional validation. An eddy current brake cannot be used to decelerate a vehicle to a standstill. However, the magnetic attraction force between the rotor and stator of an eddy current brake can be used to generate an additional mechanical friction torque. By using a disc spring between the rotor and stator, the eddy current brake is extended to a so-called hybrid brake. In particular, the model and design method of the disc spring are the focus of this work. Using a system model that includes the electromagnetic and mechanical domains, the wear reduction compared to a conventional friction brake and the dynamic behaviour depending on the spring parameters are investigated. Finally, a disc spring is designed in FEM with the desired force–displacement curve. In addition, a working demonstrator of a hybrid brake is constructed, and the electromagnetic and mechanical system models are compared with the experimental results. For the first time, it is shown that the concept of using the magnetic attraction force between the rotor and stator of an eddy current brake for braking to a stop is working. In a speed range of 0–7500 rpm, it is possible to generate a torque of 100 Nm, whereby at speeds higher than 3500 rpm, the torque is generated in a wear-free manner by eddy currents. However, in order to be valid, the model must be extended to represent the deformation of the rotor.

show abstract

Design of a frictional–electromagnetic compound disk brake for automotives

Cited by 6 publications

References 13 publications

Analysis of electromagnetic-thermal coupling braking properties of combined electromagnetic friction and shape memory alloy brake

Analysis of electromagnetic-thermal coupling braking properties of combined electromagnetic friction and shape memory alloy brake

Active Electromagnetic Clutch for Crankshaft Decoupling from a Belt Drive System

The Hybrid Brake Model and Its Validation

Contact Info

Product

Resources

About