CN104897414A - Test system for testing comprehensive performance of eddy current retarder and test method thereof - Google Patents
Test system for testing comprehensive performance of eddy current retarder and test method thereof Download PDFInfo
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- CN104897414A CN104897414A CN201510319126.XA CN201510319126A CN104897414A CN 104897414 A CN104897414 A CN 104897414A CN 201510319126 A CN201510319126 A CN 201510319126A CN 104897414 A CN104897414 A CN 104897414A
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Abstract
The invention provides a test system for testing comprehensive performance of an eddy current retarder and a test method thereof. The test system comprises the components of a personal computer, a dynamometer system, a torque and rotating speed sensor, an eddy current retarder, an electric controller and a power analyzer. The test system can continuously measure the indexes such as moment characteristic, heat fade characteristic, zero-load wind resistance and power loss of the eddy current retarder at each speed. The test system has advantages of relatively complete function, complete data acquisition, high speed regulation performance and wide test range.
Description
Technical field
The present invention relates to a kind of test macro and the method for testing of measuring current vortex retarder combination property.
Background technology
Current vortex retarder is a kind of mode of passenger vehicle auxiliary braking, is commonly called as " electricity is stopped ".Be mainly used in motorbus, urban public traffic vehicles and heavy truck.Between automobile drive axle and wheel box, realize contactless braking by electromagnetic induction principle.When we (promote the hand gear switch of retarder by some way, or step on brake pedal) when passing into galvanic to the rotor winding of retarder, magnetic field can be produced at rotor winding, this magnetic field is at adjacent stator core, magnetic pole plate, air gap, a loop is formed between rotor, if now have relative motion between rotor and rotor, this motion is just equivalent to conductor at cutting magnetic line, from electromagnetic induction principle, at this time induced current can be produced at conductor, induced current can produce another one Induced magnetic field simultaneously, acting force is had between this magnetic field and the magnetic field existed, and the direction of acting force is the direction hindering conductor motion forever.The source of retarder braking moment that Here it is.Because domestic technique relatively lags behind, current vortex retarder designed capacity lags behind international major company.The performance of retarder is understood and is mostly obtained by test.
The test method of current current vortex retarder mainly contains vehicle road test method, test method drawn by vehicle and shop experiment platform test method two kinds.Although first two test method effectively can obtain the performance index of current vortex retarder, in practical application, there is very large restriction, drop into larger.Domestic current vortex retarder manufacturer mostly adopts shop experiment platform test method.Current indoor Bench test methods is the duty by flywheel inertia simulated automotive.Though this test method process is simple, if thoroughly understand the characteristic under each speed of current vortex retarder, for production type test provides test basis, the insufficiency of stand, test period is oversize.
Summary of the invention
Testing complex, the cycle is longer, cost is higher deficiency is there is for overcoming in prior art, the invention provides a kind of test macro measuring current vortex retarder combination property, this test macro can moment characteristics, the index such as heat fading characteristic and power attenuation of retarder under each speed of continuous coverage.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of test macro measuring current vortex retarder combination property, comprise PC, dynamometer system, torque rotary speed sensor, current vortex retarder, electric controller and power analyzer, the output terminal of described PC is connected with the input end of described dynamometer system, described dynamometer system is in transmission connection by transmission shaft and described current vortex retarder, described torque rotary speed sensor is for detecting the torque and rotational speed of current vortex retarder, described electric controller can gather control signal for controlling the Driving Torque of current vortex retarder, described power analyzer feeds back to PC for the sampled value gathering electric controller.
Further, described dynamometer system comprises the dynamometer machine, clutch coupling and the wheel box that connect successively and the Dynamometer Control device for controlling dynamometer machine rotating speed.
Further, described control signal comprises rate signal, ABS signal and gear signal.
Preferably, described current vortex retarder is connected with cooling system.
The present invention also provides a kind of method of testing adopting test macro described in the claims, comprises the steps:
(1) PC sends tach signal to dynamometer system, maintains certain rotating speed and exports, drive eddy current retarder rotor to rotate;
(2) the resistance moment of torsion under the zero load of described torque rotary speed sensor measurement current vortex retarder, draws unloaded windage;
(3) electric controller gathers the tach signal of current vortex retarder, ABS signal and gear signal, controls the Driving Torque of current vortex retarder;
(4) torque rotary speed sensor gathers the rotating speed of current vortex retarder, dtc signal feeds back to PC, detects the moment characteristics under each speed of current vortex retarder and heat fading characteristic;
(5) sampled value of power analyzer collection electric controller feeds back to PC, calculates the power input of current vortex retarder, detects the power attenuation under each speed of current vortex retarder.
Further, in step (3), when the rotating speed of current vortex retarder reaches startup rotating speed, described tach signal exports, and electric controller sends control signal to current vortex retarder Driving Torque; When ABS works, ABS signal exports, and electric controller sends control signal and stops Driving Torque to current vortex retarder.
Further, in step (4), described moment characteristics and heat fading characteristic, the torque curve under drawing each gear according to the sampled value of torque rotary speed sensor, under each speed, draws moment characteristics; Under drawing each gear according to the sampled value of torque rotary speed sensor, the torque decline curve of same speed, draws heat fading characteristic.
Further, in step (5), the sampled value of described electric controller comprises output voltage values U and the current value I of current vortex retarder, and both products are the power input of current vortex retarder.
From above technical scheme, the present invention can detect the data such as moment characteristics, heat fading characteristic, unloaded windage, power attenuation under each speed of current vortex retarder, and function is fairly perfect, data acquisition complete, and speed adjusting performance is good, and test specification is wide.
Accompanying drawing explanation
Fig. 1 is the theory diagram of test macro of the present invention.
In figure: 1, PC, 2, dynamometer system, 21, dynamometer machine, 22, clutch coupling, 23, wheel box, 24, Dynamometer Control device, 3, torque rotary speed sensor, 4, current vortex retarder, 5, electric controller, 6, power analyzer, 7, transmission shaft, 8, cooling system, 9, stabilized voltage supply.
Embodiment
Below in conjunction with accompanying drawing, a kind of preferred implementation of the present invention is described in detail.
As shown in Figure 1, described test macro comprises PC 1, dynamometer system 2, torque rotary speed sensor 3, current vortex retarder 4, electric controller 5 and power analyzer 6, the output terminal of described PC 1 is connected with the input end of described dynamometer system 2, described dynamometer system 2 is in transmission connection by transmission shaft 7 and described current vortex retarder 4, described torque rotary speed sensor 3 is for detecting the torque and rotational speed of current vortex retarder 4, described electric controller 5 can gather control signal for controlling the Driving Torque of current vortex retarder 4, described power analyzer 6 feeds back to PC 1 for the sampled value gathering electric controller 5.
Described dynamometer system 2 comprises the dynamometer machine 21, clutch coupling 22 and the wheel box 23 that connect successively and the Dynamometer Control device 24 for controlling dynamometer machine rotating speed.Described Dynamometer Control device 24 can receive the tach signal that PC sends, run for controlling dynamometer machine, described clutch coupling 22 plays the effect of dynamometer machine for connecting and wheel box, described wheel box 23 can underspeed, play the effect increasing moment of torsion, when dynamometer machine itself cannot export the situation of high pulling torque, the effect of wheel box is obvious.
Described wheel box 23 is in transmission connection by transmission shaft 7 and described current vortex retarder 4, drive the rotor turns in current vortex retarder, described torque rotary speed sensor 3 can detect rotating speed and the torque of eddy current retarder rotor, and feeding back to PC 1, the rotating speed of eddy current retarder rotor can be used as rate signal and triggers the torque output that described electric controller 5 controls current vortex retarder.Before electric controller effect, current vortex retarder does not work, i.e. unloaded rotation under dynamometer machine 21 drives, now torque rotary speed sensor 3 can measure the resistance moment of torsion under current vortex retarder zero load, ignore mechanical loss, this moment of torsion is the windage of eddy current retarder rotor rotating disk under each speed, is unloaded windage.Unloaded windage can judge the retarder resistance that engine must overcome when not working, and then can judge that whether the current vortex retarder of each producer car load in idle situation is fuel-efficient.
Described control signal comprises rate signal, ABS signal and gear signal, and current vortex retarder itself cannot produce rotating speed, and after only having the rotor of dynamometer machine to drive the rotor of current vortex retarder to rotate to certain speed, current vortex retarder could work.
When the rotating speed of current vortex retarder 4 reaches the startup rotating speed of setting, described tach signal exports, and electric controller 5 sends control signal to current vortex retarder Driving Torque.Described torque rotary speed sensor gathers the rotating speed of current vortex retarder, dtc signal feeds back to PC, and then the moment characteristics detected under each speed of current vortex retarder and heat fading characteristic.
ABS and current vortex retarder are in parallel on car load, and during ABS work, current vortex retarder does not work, and during current vortex retarder work, ABS does not work, therefore, when ABS works, ABS signal exports, and electric controller sends control signal and stops Driving Torque to current vortex retarder.
Current vortex retarder is generally divided into several grades of outputs, and when manual adjustments gear, described gear signal exports, and electric controller sends control signal and exports the corresponding torque of gear to current vortex retarder.
Described power analyzer 6 feeds back to PC 1 for the sampled value gathering electric controller 5, and calculates the power input of current vortex retarder 4.Described sampled value is output voltage values U and the current value I of current vortex retarder, both products are the power input of current vortex retarder, the object calculating power input to judge the power on current vortex retarder consumption in operation Vehicular battery, and then judge retarder whether power saving and generator need the electric energy that sends, then judge whether fuel-efficient.
In order to better ensure the stable operation of system, described current vortex retarder 4 is connected with cooling system 8, and described electric controller 5 is connected with stabilized voltage supply 9.
The present invention also provides a kind of method of testing measuring current vortex retarder combination property, comprises the steps:
(1) PC sends tach signal to dynamometer system, maintains certain rotating speed and exports, drive eddy current retarder rotor to rotate;
(2) the resistance moment of torsion under the zero load of described torque rotary speed sensor measurement current vortex retarder, draws unloaded windage;
(3) electric controller gathers the tach signal of current vortex retarder, ABS signal and gear signal, controls the Driving Torque of current vortex retarder;
(4) torque rotary speed sensor gathers the rotating speed of current vortex retarder, dtc signal feeds back to PC, detects the moment characteristics under each speed of current vortex retarder and heat fading characteristic;
(5) sampled value of power analyzer collection electric controller feeds back to PC, calculates the power input of current vortex retarder, detects the power attenuation under each speed of current vortex retarder.
In step (3), described moment characteristics and heat fading characteristic, torque curve under drawing each gear according to the sampled value of torque rotary speed sensor, under each speed, draw moment characteristics, this is the Driving Torque ability of current vortex retarder, the retarder of each producer can test this data under identical condition, and then can compare quality; The torque decline curve of same speed under drawing each gear according to the sampled value of torque rotary speed sensor, draw heat fading characteristic, the retarder of each producer can test this data under identical condition, and then it is good and bad in metapyretic torque output to compare current vortex retarder.
The above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (8)
1. measure the test macro of current vortex retarder combination property for one kind, it is characterized in that, comprise PC (1), dynamometer system (2), torque rotary speed sensor (3), current vortex retarder (4), electric controller (5) and power analyzer (6), the output terminal of described PC (1) is connected with the input end of described dynamometer system (2), described dynamometer system (2) is in transmission connection by transmission shaft (7) and described current vortex retarder (4), described torque rotary speed sensor (3) is for detecting the torque and rotational speed of current vortex retarder (4), described electric controller (5) can gather control signal for controlling the Driving Torque of current vortex retarder (4), described power analyzer (6) feeds back to PC (1) for the sampled value gathering electric controller (5).
2. test macro according to claim 1, it is characterized in that, described dynamometer system (2) comprises the dynamometer machine (21), clutch coupling (22) and the wheel box (23) that connect successively and the Dynamometer Control device (24) for controlling dynamometer machine rotating speed.
3. test macro according to claim 1, is characterized in that, described control signal comprises rate signal, ABS signal and gear signal.
4. test macro according to claim 1, is characterized in that, described current vortex retarder (4) is connected with cooling system (8).
5. adopt the method for testing of test macro described in claim 1, it is characterized in that, comprise the steps:
(1) PC sends tach signal to dynamometer system, maintains certain rotating speed and exports, drive eddy current retarder rotor to rotate;
(2) the resistance moment of torsion under the zero load of described torque rotary speed sensor measurement current vortex retarder, draws unloaded windage;
(3) electric controller gathers the tach signal of current vortex retarder, ABS signal and gear signal, controls the Driving Torque of current vortex retarder;
(4) torque rotary speed sensor gathers the rotating speed of current vortex retarder, dtc signal feeds back to PC, detects the moment characteristics under each speed of current vortex retarder and heat fading characteristic;
(5) sampled value of power analyzer collection electric controller feeds back to PC, calculates the power input of current vortex retarder, detects the power attenuation under each speed of current vortex retarder.
6. test macro according to claim 5, is characterized in that, in step (3), when the rotating speed of current vortex retarder reaches startup rotating speed, described tach signal exports, and electric controller sends control signal to current vortex retarder Driving Torque; When ABS works, ABS signal exports, and electric controller sends control signal and stops Driving Torque to current vortex retarder.
7. test macro according to claim 5, is characterized in that, in step (4), and described moment characteristics and heat fading characteristic, the torque curve under drawing each gear according to the sampled value of torque rotary speed sensor, under each speed, draws moment characteristics; Under drawing each gear according to the sampled value of torque rotary speed sensor, the torque decline curve of same speed, draws heat fading characteristic.
8. method of testing according to claim 5, is characterized in that, in step (5), the sampled value of described electric controller comprises output voltage values U and the current value I of current vortex retarder, and both products are the power input of current vortex retarder.
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| CN105093046A (en) * | 2015-09-17 | 2015-11-25 | 上海电机系统节能工程技术研究中心有限公司 | Measurement and control device used for eddy current retarder delivery inspection |
| CN105301414A (en) * | 2015-11-21 | 2016-02-03 | 成都科瑞信科技有限责任公司 | Eddy current retarder test system based on voltage conversion |
| CN105300708A (en) * | 2015-11-21 | 2016-02-03 | 成都科瑞信科技有限责任公司 | Eddy current retarder test system based on torque signal filtering adjustment |
| CN105466675A (en) * | 2015-11-21 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Electric eddy current retarder test system based on emitter coupling type amplification circuit |
| CN105486517A (en) * | 2015-11-21 | 2016-04-13 | 成都科瑞信科技有限责任公司 | Novel eddy current retarder test system |
| CN106501010A (en) * | 2016-12-05 | 2017-03-15 | 湖北航天技术研究院特种车辆技术中心 | A kind of test device and method |
| CN107782568A (en) * | 2017-10-23 | 2018-03-09 | 中国北方车辆研究所 | A kind of method of testing of crawler travel device power attenuation |
| CN113984405A (en) * | 2021-10-18 | 2022-01-28 | 中国第一汽车股份有限公司 | Method for testing braking performance of retarder |
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| CN105301414A (en) * | 2015-11-21 | 2016-02-03 | 成都科瑞信科技有限责任公司 | Eddy current retarder test system based on voltage conversion |
| CN105300708A (en) * | 2015-11-21 | 2016-02-03 | 成都科瑞信科技有限责任公司 | Eddy current retarder test system based on torque signal filtering adjustment |
| CN105466675A (en) * | 2015-11-21 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Electric eddy current retarder test system based on emitter coupling type amplification circuit |
| CN105486517A (en) * | 2015-11-21 | 2016-04-13 | 成都科瑞信科技有限责任公司 | Novel eddy current retarder test system |
| CN106501010A (en) * | 2016-12-05 | 2017-03-15 | 湖北航天技术研究院特种车辆技术中心 | A kind of test device and method |
| CN106501010B (en) * | 2016-12-05 | 2019-05-14 | 湖北航天技术研究院特种车辆技术中心 | A kind of test device and method |
| CN107782568A (en) * | 2017-10-23 | 2018-03-09 | 中国北方车辆研究所 | A kind of method of testing of crawler travel device power attenuation |
| CN113984405A (en) * | 2021-10-18 | 2022-01-28 | 中国第一汽车股份有限公司 | Method for testing braking performance of retarder |
| CN113984405B (en) * | 2021-10-18 | 2024-05-07 | 中国第一汽车股份有限公司 | Retarder braking performance test method |
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