CN1243359A - Electromagnetic energy-consumption braking motor and application system thereof - Google Patents

Abstract

The present invention is formed from two electric portions of coaxial separate-excited three-phase generator and three-phase asynchronous motor which is powered by the said three-phase generator and is connected in reverse phase sequence. Said invention is characterized by that it utilizes the regulation of exciting current to regulate the electromechanical energy conversion rate of the power generator, and further regulates the brake moment of the motor in plug braking state, and makes the power generator and motor consume kinetic energy under the electromagnetic effect to produce braking moment. By preposing the action, when the said invention is matched with mechanical brake organically, it not only can raise the safety coefficient and effective service lie of said brake system, but also can improve driver and conductor comfortableness and anti-fatigue property of whole vehicle.

Description

Electromagnetic energy-consumption braking motor and application system

The present invention relates to a kind of amplification that has, kinetic energy is changed into the specific type of electric machine of heat by galvanomagnetic effect.

In the present prior art, the brake of automobile has disc type and drum-type two class contour structures, but its operation principle is identical, all is to produce resistance by mechanical friction to realize braking purpose, so can be described as the contact mechanical brake.The Yin Qiben quality factor is limit; can not avoid wear phenomenon during use; thereby essential running check; in time change the parts of serious wear; otherwise may cause security incident; also has a problem that more can not be ignored in addition; when brake hard; might occur occurring handling out of control because of locking phenomenon; can become traffic accident when serious; though now having many manufacturing firms to release has the automobile brake of antilock device protection system, can comparatively effectively prevent to handle out-of-control phenomenon, because of its complex structure; factors such as cost height and sensitivity are limited; the popularity rate for many years that occurs is not high, and also can produce some seismisms in use, has increased user's degree of fatigue.Once more, the acceleration that produces in braking procedure increases with the decline of the speed of a motor vehicle often, thereby in the violent inertia impact phenomenon of normal appearance of the moment of stopping, may cause driver and conductor's collision injures and deaths when serious.

It is low to the objective of the invention is to design a kind of wear rate, antiblocking property is arranged, and braking moment has dynamic self-adapting, coefficient of safety and useful life that the level and smooth flexible braking device of braking acceleration curvilinear motion improves braking system, and the antifatigue degree of driver and conductor's comfort and vehicle.

The present invention is a utilization electromagnetism mechanics, the separate excitation threephase generator with by its power supply, the three phase squirrel cage induction motor that phase sequence is opposite is connected as a single entity, allow generator and motor under being in relative plugging state all under the galvanomagnetic effect effect, work to consume kinetic energy, the energy converting between mechanical rate of the exciting current scalable generator by regulator generator reaches the purpose of regulating braking moment.Design feature of the present invention is that the stator and the rotor of motor is divided into two parts on electrical structure, and two-part electric energy transmitting carries out in rotor, and the excitation winding termination of generator is unique electric energy input of this motor.Stator is divided into generator excitation magnetic pole and motor mouse cage iron core two parts in the axial direction, and rotor is divided into three-phase generation winding and the electronic winding of three-phase in the axial direction, and two parts negative-phase sequence links to each other.This motor internal induced current is bigger, and does not have long transmission range, thereby should adopt thicker single turn winding, reduces manufacture difficulty, improves the conductor heat-sinking capability.In order to make braking moment level and smooth as far as possible when the low speed, be unlikely to when high speed, to produce excessive eddy current heat again, the limiting frequency of alternating current is 600 to 800 hertz of logarithms of setting excitation pole on the braking motor stator when the practicality to satisfy.During work, because kinetic energy is converted into heat energy under the galvanomagnetic effect effect, thereby the heat dispersion of motor housing is had relatively high expectations.Because operational environment is relatively poor, seal request is also higher.

Braking motor is compared with mechanical brake, its significant advantage has 3 points: one, intrinsic dynamic self-adapting, braking moment becomes the forward ratio with vehicle wheel rotational speed, if wheel does not rotate, then braking moment also is zero, thereby the locking out-of-control phenomenon can not occur in use, braking the moment of stopping inertia impact can not occur yet, and fail safe and comfortableness all are improved; Its two, untouchable execution function can not cause executive item wearing and tearing during work, high life, and stable work in work, maintenance workload is little; Its three, electrical communications is quick on the draw, adjustability is big, the braking moment linearity is smoothly stable, is easy to and sensor interface forms intelligence system.

Braking motor has stronger dynamic self-adapting, when non-low speed brake hard, its service behaviour is better than mechanical brake, but when the low speed brake hard, braking effect is but not as mechanical brake, thereby can not replace mechanical brake, and can only be used with it, Each one displays that in which he excels, maximize favourable factors and minimize unfavourable ones, it is higher to form coefficient of safety, and comfortableness is better, and the little brand-new braking system of maintenance.Concrete scheme is to adopt electromagnetism preposition, and the Design Pattern that mend the machinery back is only used electromagnetic brake under the situation about there is no need again, can improve the useful life of mechanical brake like this, and the life-span of electromagnetic brake is almost irrelevant with use amount.Simply make this system that makes good use of flexibly for the ease of the operator, comparatively effective method is the adjustment stroke of the second half section free travel of former brake as the braking motor exciting current, exciting current is deepened to increase with stroke, when reaching former effective stroke, electric current reaches maximum, no longer deepens to change with stroke.Use according to such flow process during use, suitable step on brake, when feeling that effect is not enough, just increase the stroke degree of depth, satisfied to arriving, can't accomplish the end in view when exciting current reaches maximum, down touch on the brake, then braking motor still keeps the work of maximum energy converting between mechanical coefficient, mechanical brake also begins to bring into play effect, the workload of compensation braking motor deficiency.The installation site of braking motor determines flexibly according to different automobile types, the operational version principle is simple as far as possible, for driving wheel, the braking motor design can be linked to each other with power transmission shaft at gearbox on power transmission shaft or through the accelerating gear group, its advantage is that the change parts are less, and can obtain high rotational speed, can reduce the braking motor volume and weight,, then adopt and the similar outboard rotor type of ceiling-fan motor profile braking motor for non-driving wheel, closely link to each other with disk brake, place in the epicycle.

Claims (4)

1, by coaxial separate excitation threephase generator and the braking motor that constitutes by its power supply, three phase squirrel cage induction motor that phase sequence is opposite, exciting current by the control generator, both energy conversion rates of may command generator, realize regulating the purpose of braking moment, it is characterized in that generator and motor all work to consume kinetic energy under the effect of galvanomagnetic effect, three phase windings of generator and motor are all on rotor, and be the negative-phase sequence mode of connection, purpose is in order to make structure tighter firmly rapid, to allow motor be in relative plugging state with generator all the time.

2, threephase generator according to claim 1, the logarithm of excitation pole on its stator, it is characterized in that being 600 to 800 hertz with the limit ac frequency that is produced when the practice is as the criterion, its objective is that in order not produce excessive eddy current heat when the high speed braking moment that again can be when low speed is level and smooth as far as possible.

3, braking motor according to claim 1, its application system is to be used by moving preposition and mechanical brake, Each one displays that in which he excels, the preposition method of moving is the adjustment stroke of the second half section free travel of former brake as the braking motor exciting current, when reaching former effective stroke, the braking motor excitation is saturated, reach the greatest coefficient of energy converting between mechanical rate, at former effective stroke, the excitation amount of braking motor all is in saturation condition, play effectiveness jointly with mechanical brake, only needing it is characterized in that the stroke of the control brake flexibly degree of depth, just can allow this system be in optimal operating state.

4, braking motor according to claim 1, its installation site feature is by linking to each other with driving wheel with power transmission shaft or gearbox accelerating gear, then adopts closely to link to each other with the disc type mechanical brake with the similar outboard rotor motor of ceiling fan profile for non-driving wheel to place in the wheel.