A fixed stator eddy current retarder

Abstract

The invention discloses a stator fixed type eddy current retarder which conducts braking and speed reducing on an automobile. The stator fixed type eddy current retarder comprises an outer rotor, an inner stator and a stator shaft, wherein the outer rotor is of a hollow-cylinder-shaped structure, a plurality of U-shaped stator magnet yokes are fixedly arranged on the outer ring surface of the inner stator, the bottom faces of all the U-shaped stator magnet yokes are fixedly arranged on the outer ring surface of the inner stator in the axial direction of the inner stator, a U-shaped opening of each U-shaped stator magnet yoke faces toward the inner surface of the outer rotor, and a gap is arranged between each U-shaped opening of each U-shaped stator magnet yoke and the inner surface of the outer rotor. The plurality of U-shaped stator magnet yokes are divided into m sets, the m sets of U-shaped stator magnet yokes are distributed at equal intervals in the axial direction of the inner stator, each set of U-shaped stator magnet yokes are composed of n U-shaped stator magnet yokes, the n U-shaped stator magnet yokes in each set are arranged in an equal-angle mode in the outer ring peripheral direction of the inner stator, and a magnet exciting coil is wound on each U-shaped opening of each U-shaped stator magnet yoke in each set. The magnetic field usage rate is high, under the condition that the same current is switched on, produced braking torque is large, and braking safety performance is good.

Description

Technical field [0001] The invention relates to an eddy current retarder which is installed on an automobile to brake and decelerate the automobile. The use of electromagnetic to generate braking torque is an auxiliary brake for automobiles. Background technique [0002] With the development of the highway network, the speed of cars is getting faster and faster, and the braking load of cars also increases. The traditional friction brake system is prone to brake heat decay under long-term continuous braking conditions, and the braking efficiency is greatly reduced or even disappears completely. The use of non-contact eddy current auxiliary braking system can effectively solve the problem of thermal decay of friction brakes and greatly improve the driving safety of vehicles. [0003] At present, most of the disc-type eddy current retarders that have been widely used in passenger cars and trucks have a structure: the stator part is composed of eight iron cores made of high-permeabil...

AI Technical Summary

Problems solved by technology

The current retarder has complex winding, large volume, heavy mass, inconvenient installation, and low utilization rate of the magnetic field, so the braking torque is small

And the plane of the rotor is perpendicular to the axis. When the axial movement occurs, the rotor will scratch the stator and damage the retarder.

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