Coil and permanent magnet hybrid excitation type eddy current retarder

An eddy current retarder and compound excitation technology, applied in asynchronous induction clutches/brakes, motors, electric vehicles, etc., can solve the problems of low magnetic permeability, excessive magnetic leakage, insufficient braking torque, etc. Long life, large torque, good low-speed braking ability

Active Publication Date: 2013-09-25
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the patent CN101471597A, a structure of electric and permanent magnet composite retarder is disclosed, which solves some problems of friction brakes to

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  • Coil and permanent magnet hybrid excitation type eddy current retarder
  • Coil and permanent magnet hybrid excitation type eddy current retarder
  • Coil and permanent magnet hybrid excitation type eddy current retarder

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Embodiment Construction

[0022] The composition, structure and working method of the compound excitation type eddy current retarder using coils and permanent magnets of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] Such as figure 1 , the present invention includes a left rotor disk 1, a right rotor disk 6 and a stator, wherein the stator is composed of several even electric permanent magnet excitation devices, the number is 8, and the rotor disks 1 and 6 are symmetrically distributed in 8 electric permanent magnet excitation devices. On both sides of the magnetic excitation device, the electric permanent magnetic excitation device includes an excitation coil 4, a permanent magnet 3, a magnetic powder layer 5, and a yoke 2. The permanent magnet 3 is made into a hollow cylindrical shape, filled with a cylindrical container filled with magnetic powder 5, and the high conductivity The yoke 2 made of magnetic material is installed at both en...

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Abstract

The invention relates to a coil and permanent magnet hybrid excitation type eddy current retarder. The retarder comprises left and right rotor discs, a stator support, a stator and a controller, wherein the stator is composed of eight electric permanent magnet excitation devices; the left and right rotor discs are symmetrically distributed at two sides of the eight electric permanent magnet excitation devices; the electric permanent magnet excitation devices comprise excitation coils, permanent magnets, magnetic powder and magnet yokes; the permanent magnets are made into hollow cylinders filled with cylindrical containers full of the magnetic powder; the magnet yokes made from high-permeability materials are arranged at two ends of the permanent magnets; the magnet yokes completely cover the magnetic powder layers and the end faces of the permanent magnets; the excitation coils wind the cylindrical outer surfaces of the permanent magnets; the stator is fixed through the stator support and distributed circumferentially; the magnetic poles of each two adjacent excitation coils are opposite. According to the car retarder disclosed by the invention, the magnetic field of the stator is enhanced by the permanent magnets, and the magnetic permeability of the stator is improved by the magnetic powder at the same time.

Description

technical field [0001] The invention relates to an automobile retarder, in particular to the field of an eddy current retarder using a composite excitation of a coil and a permanent magnet, and in particular to the field of a braking device in which a magnetic conductor moves in a magnetic field to generate a resistance torque to achieve the purpose of braking . technical background [0002] At present, the friction brakes used in automobiles can be divided into two categories: drum type and disc type. The friction braking process is actually to convert the kinetic energy of the vehicle into heat energy through the brake absorption, which will cause the temperature of the brake to rise and affect the braking performance. Compared with drum brakes, disc brakes have the advantages of strong thermal decay resistance, smaller size and mass, and stable braking performance, so the application of disc brakes in automobiles is gradually increasing. However, both disc brakes and dru...

Claims

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Application Information

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IPC IPC(8): H02K49/04B60L7/28
CPCY02T10/64
Inventor 何仁赵强
Owner JIANGSU UNIV
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