Characteristic Analysis and Control of a Hybrid Excitation Linear Eddy Current Brake
نویسنده
چکیده
In this paper, a novel hybrid excitation linear eddy current brake is presented as a braking system for high-speed road and rail vehicles. The presence of the permanent magnets (PMs), whose flux lines in the primary core are oppositely directed with respect to the flux lines by the excitation windings, has the effect of mitigating the saturation of the iron in the teeth of the primary core. This allows the brake to be fed with more intense currents, improving the braking force. First, using the magnetic equivalent circuit method and the layer theory approach, the analytical model of the hybrid excitation linear eddy current brake was developed, which can account for the saturation effects occurring in the iron parts. The saturation effects make the design and control of eddy current brakes more difficult. Second, the relationship between the braking force characteristics and the design parameters were analyzed to provide useful information to the designers of eddy current brakes. Then, the controller of the hybrid excitation linear eddy current brake was designed to control the amplitude of the braking force. Finally, experimental measurements were conducted to verify the validity of the theoretical analysis.
منابع مشابه
INVESTIGATION OF NON-LINEAR CYCLES’ PROPERTIES IN STRUCTURES SUBJECTED TO ENDURANCE TIME EXCITATION FUNCTIONS
Endurance Time Method (ET) is a dynamic analysis in which structures are subjected to intensifying accelerograms that are optimized in a way that seismic performance of structures can be estimated at different hazard levels with the best possible accuracy. For the currently available ET accelerograms, regardless of the shaking characteristic, an excitation level is recognized as a representativ...
متن کاملStudy on Combined Braking of Eddy Current Retarder and The Main Brake
Aiming at the main brake force distribution by using the proportional distribution and the braking force of eddy current retarder with shift, it affected the attachment of wheels on the ground. Through the establishment of vehicle dynamics, relationship of sliding rate with braking force and the eddy current retarder braking dynamics model, the controlled method was researched by relative value...
متن کاملDesign of Nondestructive System for Hardness of Carbonitrided Steel Parts Using Eddy Current Testing Method: Case study on the Tappet Parts
In this paper, a non-destructive eddy current test system was designed to evaluate the surface hardness of the carbonitrided steel parts. For this purpose, various samples of the tappet were used after the surface hardening and grinding operations as control samples and, if necessary, were subjected to destructive and non-destructive tests. Microstructural studies were performed with a microsco...
متن کاملThe Finite Element Analysis of Magnetic Field of the Hybrid Excitation Linear Synchronous Motor with Permanent Magnet and Electric Excitation
Abstract This paper introduces the structure and characteristic of two novel kinds of hybrid excitation linear synchronous motor with permanent magnet and electric excitation-alternant hybrid excitation and even hybrid excitation linear synchronous motor. The air-gap magnetic field of them is analyzed with ANSYS8.1 software package. The results of the distribution of magnetic field and the elec...
متن کاملAn Investigation on the Effect of Using Regenerative Braking System on Energy Consumption Reduction of Hybrid Vehicles Based on Tehran City Driving Cycle
In driving and when you brake, a lot of energy is dissipated to stop the car; especially in urban areas where the vehicle is driving in a stop-and-go pattern. This energy, which is dissipated by the brake pads, can be stored in the vehiclechr('39')s battery. In Hybrid and Electric Vehicles, a regenerative brake can be used alongside the mechanical brakes to regenerate some energy while braking....
متن کامل