Speed inhibitor for automobile

Abstract

The invention is concerned with retarder for vehicle, relating to stator and rotor eddying around the stator making of soft magnetic material. There is work clearance between the stator and rotor and there is excitation loop embeds on the stator. The work clearance is filled with powder medium of soft magnetic or liquid medium containing soft magnetic power. There is a main magnetism route made of the rotor and the clearance round the excitation loop, and when the excitation loop is electrifying, the powder medium of soft magnetic or liquid medium containing soft magnetic power of the work clearance will produce trig torque. When the vehicle moves slowly or is rest, this retarder for vehicle can give out large trig torque. The excitation current, volume and weight are small.

Description

technical field [0001] The present invention relates to a vehicle retarder, in particular to a retarder for road and agricultural motor vehicles and horizontal and vertical transport machinery braking, the retarder includes a stator and a rotor made of soft magnetic materials, the stator A radial working gap is formed with the rotor, and an excitation coil is embedded in the stator. Background technique [0002] France was the first to apply eddy current retarders to vehicles, and this kind of eddy current retarders are still widely used in Europe and have recently been introduced to China. In "Commercial Vehicle" magazine, 2001, No. 12, pp. 40-43, "The use of eddy current retarders on large and medium-sized passenger cars" and "Urban Vehicles", 2002, No. 2, pp. 52-54 "TELMA Electric The structure, working principle and performance of this eddy current retarder are described in the article "Eddy Current Retarder". This eddy current retarder is mainly composed of a stator, ...

AI Technical Summary

Problems solved by technology

However, the problem found in the use is: when the DC voltage of the vehicle is 24 volts, the magnetic resistance of the working gap is too large, so when sufficient magnetic field strength is generated in the working gap, the excitation current required by the excitation coil is too large, generally reaching dozens of Amps to more than 100 amps, the load on the car battery pack is too large, and some cars have to add generators and power supply batteries as a last resort

This light-weight permanent magnet retarder uses permanent magnets to generate a magnetic field without setting an excitation coil, so it is light in weight and consumes less power, but the braking torque is limited, and its residual braking torque is relatively large when the vehicle is running normally. , the scope of application is very limited

However, the hydraulic retarder introduced in the same publication has the problems of heavy weight, poor reliability, large braking noise, and a sharp drop in braking torque when the car goes downhill. In principle, this type uses the liquid eddy current theory to generate braking Torque products all have water eddy current residual torque, so the energy consumption is large at no-load

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