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Permanent-magnet eddy current retarder based on Halbach array

A permanent magnet eddy current and retarder technology, which is applied in the direction of permanent magnet clutches/brakes, can solve the problems that have not been seen in the application of Halbach arrays, and achieve the effects of high magnet utilization efficiency, large braking torque, and convenient adjustment of the working area

Inactive Publication Date: 2012-06-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field of vehicle eddy current braking, there is no related application of Halbach array.

Method used

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  • Permanent-magnet eddy current retarder based on Halbach array
  • Permanent-magnet eddy current retarder based on Halbach array
  • Permanent-magnet eddy current retarder based on Halbach array

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Effect test

Embodiment Construction

[0024] The present invention will be further described below in conjunction with drawings and embodiments.

[0025] Such as Figure 4 , Figure 5 , Figure 6 Shown, the present invention comprises left fixed plate 15, right fixed plate 21, power transmission shaft 14, rotor 18, servo motor 1, shaft coupling 2, motor fixed frame 3, two-way lead screw shaft 6, the left and right sides of opposite direction of rotation Lead screw nuts 8, 11, three linear optical axes 16, and two stators with the same structure. The rotor 18 made of magnetically permeable material is mounted on the drive shaft 14 through a key. One end of the rotor 18 rests on the shaft shoulder, and the other end is fixed with a round nut 20. The web between the rotor hub and the rotor outer ring is processed into a fan blade shape. When the rotor 18 rotates with the transmission shaft 14, the generated axial airflow will take away the heat generated during braking. The two ends of transmission shaft 14 are r...

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Abstract

Rotors are installed on a transmission shaft; the transmission shaft is installed in a central hole of a fixing plate; two ends of a bidirectional screw shaft are installed inside holes above the central hole of the fixing plate; two ends of each of three linear optical shafts are fixed into holes in front of, behind and below the central hole of the fixing plate; each of the two rotors consists of a Halbach-array permanent-magnet ring and a retaining rack; an outer cylindrical surface of the permanent-magnet ring is fixed inside a center hole of the retaining rack; a radial clearance is formed between an inner cylindrical surface of the permanent-magnet ring and an outer cylindrical surface of each rotor; four installing holes are uniformly distributed on the retaining rack; an upper installing hole is matched with the bidirectional screw shaft through a screw nut; the other three installing holes are matched with the linear optical shafts through linear bearings; and a servo motor is connected whit the bidirectional screw shaft through a shaft coupler. In the radial-array permanent-magnet eddy current retarder, the utilization ratio of a magnet is high, the brake moment is large, the response is quick, the heat dissipating conditions are good and the stepless regulation of the brake moment is realized.

Description

technical field [0001] The invention relates to an auxiliary braking device for vehicles, in particular to a permanent magnet eddy current retarder based on a Halbach array. Background technique [0002] At present, the retarders used in vehicles at home and abroad mainly include hydraulic retarders and eddy current retarders. The eddy current retarders are generally composed of stators, rotors, coils for generating magnetic fields, and fixed brackets. [0003] When the eddy current retarder is working, the electromagnetic coil is energized to generate a magnetic field, and the magnetic flux in the area surrounded by countless closed wires inside the working surface where the rotating rotor cuts the magnetic force line changes, thereby generating a vortex-shaped induced current on the rotor working surface. That is, the eddy current. After the eddy current is generated, the electromagnetic field will produce resistance to the charged rotor to prevent the rotor from rotating,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K49/10
Inventor 魏燕定郭远晶周晓军黎建军黄茫茫罗竹辉
Owner ZHEJIANG UNIV
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