CN104267349A - Automobile generator testing system - Google Patents
Automobile generator testing system Download PDFInfo
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- CN104267349A CN104267349A CN201410568554.1A CN201410568554A CN104267349A CN 104267349 A CN104267349 A CN 104267349A CN 201410568554 A CN201410568554 A CN 201410568554A CN 104267349 A CN104267349 A CN 104267349A
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Abstract
The invention provides an automobile generator testing system. The automobile generator testing system comprises a computer, a conditioning circuit, a temperature control box, a load box, a generator driving unit and a sensor transformation unit. The computer is connected with the conditioning unit, the temperature control box, the load box and the generator driving unit. The conditioning circuit is connected with the load box, the generator driving unit and the sensor transformation unit. The generator driving unit comprises a variable frequency motor, a braking circuit and a frequency converter. The variable frequency motor, the braking circuit and the frequency converter are sequentially connected. The frequency converter is connected with the computer and the conditioning circuit. Speed control over an automobile generator by the computer includes open-loop control and closed-loop control. The automobile generator testing system is simple in structure, large in comprehensive testing item number, high in interference resistant capacity, wide in temperature range, good in data processing, good in accuracy, easy to operate and high in working efficiency.
Description
Technical field
The present invention relates to the test experiments equipment for the duty of simulated automotive generator under various environment and condition, be specifically related to a kind of automobile current generator test macro.
Background technology
Nowadays the automobile current generator test board be widely used, needs manual record institute test data, and the project that can test of same test board or technical indicator very single; As needed whole the key technical indexes of testing automobile generator test system, then the dissimilar test board of multiple stage is needed.
In addition, the poor anti jamming capability of present automobile current generator measuring technology, Range of measuring temp is little, and signal-data processing is good not, poor accuracy, complicated operation.
Summary of the invention
In order to overcome the above-mentioned shortcoming of prior art, the invention provides a kind of employing graphic programming, its structure is simple and direct, integration test project is many, antijamming capability is strong, temperature range is large, the automobile current generator test macro that data processing is good, accuracy is good, simple to operate, work efficiency is high.
Automobile current generator test macro of the present invention adopts following technical scheme: automobile current generator test macro, comprises computing machine, modulate circuit, temperature control box, load box, generator drive unit and sensor transformation unit; Computing machine is connected with modulate circuit, temperature control box, load box and generator drive unit respectively; Modulate circuit is connected with load box, generator drive unit, sensor transformation unit respectively;
Described generator drive unit comprises variable-frequency motor, braking circuit and frequency converter, and variable-frequency motor, braking circuit and frequency converter connect successively, and frequency converter is connected with computing machine, modulate circuit respectively;
The speeds control of described computing machine to automobile current generator comprises opened loop control and closed-loop control; Described opened loop control, refers in process of the test, and computing machine controls frequency converter, by the running status of Frequency Converter Control variable-frequency motor according to preset requirement output order; Described closed-loop control, refers in process of the test, and computing machine is come in real time to frequency converter output order by the parameter reading variable-frequency motor, thus controls the running status of variable-frequency motor in real time.
Compared with prior art, the invention has the beneficial effects as follows:
1, high temperature, low temperature environment can be simulated, and humidity environment, the working condition of various automobile current generator is tested, generated electricity by high-power frequency conversion motor simulated automotive engine driven generators, maximum DC current is provided to automobile storage battery and load box, simulate various condition by computing machine and various smart machine in the process, and monitor the state of automobile current generator in real time, complete the high speed impact of various generator product and the test assignment of high/low temperature endurancing and performance of dispatching from the factory.
2, the present invention is comprehensive experiment platform, structure is simple, test event is many, (temperature becomes permanance to comprise four large endurancings, high temperature durability, the high accelerated durability of heat, maximum fast endurancing), moment of torsion examination characteristic tests (cold test, hot test), electric characteristic test (cold test, hot test, driving power and efficiency test), regulator performance test (voltage tester, load characteristic, rotary speed property is tested), throw load test (throws electrical equipment, throw battery, full throwing), (generator exceeds the speed limit overspeed test, cold conditions, regulation voltage is tested).
3, the present invention adopts powerful frequency converter and variable-frequency electric function to obtain comparatively ideal speed, acceleration; The use of brake unit and braking resistor can obtain braking preferably and acceleration.
4, the present invention directly can extract signal data more accurately from generator; Have wider temperature test scope, Range of measuring temp can reach-40 ~ 150 DEG C; Adopt graphic programming, work efficiency is high, saves time; Antijamming capability is strong.
Accompanying drawing explanation
Fig. 1 is system framework figure of the present invention;
Fig. 2 is the structured flowchart of modulate circuit.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiment of the present invention is not limited thereto.
As shown in Figure 1, automobile current generator test macro of the present invention comprises computing machine, modulate circuit (namely nursing one's health case), temperature control box, load box, generator drive unit and sensor transformation unit; Generator drive unit comprises variable-frequency motor, braking circuit and frequency converter, and braking circuit comprises brake unit and braking resistor, and frequency converter, brake unit, braking resistor and variable-frequency motor connect successively.Computing machine is connected with the frequency converter of temperature control box, load box and generator drive unit respectively by RS232 and RS485 communication port.Modulate circuit is connected with the frequency converter of computing machine, generator drive unit, sensor transformation unit respectively.
As shown in Figure 2, modulate circuit comprises: sensor group (comprising voltage sensor, current sensor and F/V sensor), filtering circuit, AD Acquisition Circuit, MCU controller, DAQ capture card (comprising the signals collecting such as AI/AO/DI/DO/Counter and output), voltage sensor, current sensor and F/V sensor are connected with DAQ capture card respectively, and F/V sensor, filtering circuit, AD Acquisition Circuit, MCU controller connect successively.MCU controller adopts single-chip minimum system plate to realize, and MCU controller gathers voltage, electric current, motor speed (F/V is used for motor speed conversion) by AD Acquisition Circuit, is then shown by liquid crystal display after adjustment.The voltage collected, electric current and tach signal, by PCIe bus and industrial computer communication, are delivered in the software of industrial computer, and the modules such as frequency converter are delivered in software control instruction, and show current state by DAQ capture card.
Described computing machine is connected with the generator signal of 2 platform independent be arranged on experiment table.Be connected by I/O, A/D and serial communication circuit between computing machine with modulate circuit.Temperature control box comprises refrigeration unit, heating element (as 6KW heating tube), temperature-humidity controller, K type thermopair, JCJ humidity sensor, PWM control SSR solid-state relay, humidification boiler and centrifugal fan etc.Control the operating ambient temperature (normal temperature or high/low temperature) of generator in an experiment, setting temperature lift-down curve.Carry out air circulation by centrifugal fan, in experimental box body, set up effective homogeneous air temperature field, thus make fresh wind port be extremely uniform, controllable temperature place near measured motor afterbody.Sensor transformation unit is connected with between load box and front end modulate circuit.
Generator main loop is in parallel by major loop, load box and accumulator by 4 D.C. contactors, throw in load box, accumulator both its put a little will by the in good time action of technological requirement.The rate signal sampling of generator could normally can only work when electrical power generators; Generator, when low speed does not generate electricity, adopts the product value of drive motor frequency and gearing factor as generator speed signal.Load box comprises ohmic load and power consumption resistance, and each power transistor is provided with independently current-sharing balance control module.Load box has independently electric current, voltage display.
The output terminal of tested generator and accumulator, load box are in parallel.After these three groups of electric currents of output generator current A1, accumulator cell charging and discharging electric current A2, controlled load tank current A3 are collected, the PCI-6221 data collecting card A/D interface in conditioning case sends computing machine to.The simultaneously collected output voltage, accumulator voltage etc. that also have generator.The various signals collected export with voltage signal, after long-distance transmissions, be converted to 0 ~ 10V voltage signal, be input to computing machine by modulate circuit.
Experiment table is electromechanical integration equipment, is generated electricity, provide maximum DC current to automobile storage battery and load box by powerful variable-frequency motor simulated automotive engine driven generators.Various condition is simulated in the process by computing machine and various smart machine, and monitor the state of generator in real time, according to automobile industry standard " motorcar alternator technical conditions " (QC/T729-2005), complete the high speed impact of various generator product and the test assignment of high/low temperature durability experiment and performance of dispatching from the factory.The key technical indexes parameter of the comprehensive performance test system of automobile current generator is as shown in the table:
Working power of the present invention adopts three-phase five-wire mode 380V, 60KVA, safety line, voltage fluctuation is less than 6%, application claims ambient operating temperature is between-40 ~ 150 DEG C, and environmental work relative humidity is less than 80%, require system context dustless, without the plague of rats.Configuration and the installation of automobile current generator test macro of the present invention are as follows:
1, configure
Test experimental bed can operating space 600L:L800x W800x H950mm, and during thermostatic and temperature changing, refrigeration work consumption is completed by 36 compressor train, thermal value controlled power 6KW, drive motor 3000KW, samming fan 25Wx4.Humid control humidification boiler 4KW, humidity sensor and humidification water tank etc.Totally 30, generator fixture 5 kind of 10 cover.
Electrical control cabinet, industrial computer 19 cun of widescreen liquid show and interface, and MITSUBISHI transducer, brake unit, variable-frequency motor and braking resistor 1 is overlapped.300A load box 2; Conditioning 2, case (electric current, voltage, speed pickup etc.).Be placed in above test board.
2, install
Line between switch board and experiment control platform (comprising load box, conditioning case) divides two parts, strong circuit part (driving power) and weak circuit part (signal wire and connection).Computing machine and the direct tie-portion of front end modulate circuit: I/O, A/D, serial port communication line.
The control loop of automobile current generator test macro of the present invention comprises Temperature and Humidity Control loop and speed control loop.Wherein the principle in Temperature and Humidity Control loop is as follows: arrange Temperature and Humidity Control mode (constant temperature, Multiple Cycle, temperature shock, constant temperature and humidity or temperature-changeable constant-humidity etc.) at computer interface, refrigeration unit is started, thermal value when regulating the refrigerating capacity counteracting motor in supply experiment table casing to run by reed time controll.By the electrical heating tube element supplementary heating amount in RS485 mouth Control release platform casing, to reach the object controlling air themperature.The air carrying out cold and hot exchange through evaporator, electric heater is sent circulation from the fresh wind port on casing top by circulating fan.Air is changed by its thermal value through motor periphery, enters the cooled or heating in air-treatment district again, then be recycled fan and send to return air inlet.Moisture is added, to reach the object controlling air humidity by the humidification boiler in Control release platform casing.
The principle of speed control loop is as follows: tested generator is arranged on experiment table, is connected with the belt pulley of drive motor by 6PK ~ 8PK polywedge bet; Set various driving parameter frequency converter and variable-frequency motor, drag tested generator operation.On-line Control is completed by Computer I/O mouth.The rate signal of generator gathers from P terminal phase line after electric power generation.At low-speed region, the speed of generator automatically calculates ratio of gear by variable-frequency motor and determines, also manually can calculate amendment and store, and controls and display in low regime for system.The plus-minus degree of generator controls, by write converter parameter, to complete after automatically being calculated by frequency converter.Performance test and the test of permanance Multiple Cycle can be set as open loop, closed-loop control two kinds of methods of operation, and closed-loop control is completed by the PID regulatory function in frequency converter.High speed impact, compound variable speed experiment hourly velocity controls as open loop control mode.Experiment table can drag two generators simultaneously, and at this moment speeds control will be that control object controls with mair motor, and the velocity accuracy of auxiliary-motor will not ensure.The voltage level of generator identical (12V or 24V) must be ensured when dragging two generators simultaneously.
Opened loop control, refer in process of the test, the software in computing machine is according to preset requirement, and output order controls frequency converter, by the running status of Frequency Converter Control variable-frequency motor, the software in computing machine does not read the parameter (as voltage, electric current and rotating speed) of variable-frequency motor.Closed-loop control, refers in process of the test, and the software in computing machine is come in real time to frequency converter output order by the parameter (such as voltage, electric current and rotating speed) reading variable-frequency motor, thus controls the running status of variable-frequency motor in real time.That is, when opened loop control, the software in computing machine only exports once command to frequency converter, and frequency converter independently controls the operation of variable-frequency motor according to described instruction, and the software in computing machine no longer participates in the process of Frequency Converter Control variable-frequency motor; And during closed-loop control, the software in computing machine can read the running status of variable-frequency motor in real time and send instruction to frequency converter, control the state of motor in real time.The present invention only just can adopt opened loop control in minority test, as high speed accelerated test, attribute testing etc. need generator speed to raise rapidly time, but the state of closed-loop control will be entered at once after rotating speed comes.
As mentioned above, just can implement the present invention preferably, above-described embodiment is only preferred embodiment of the present invention, is not used for limiting practical range of the present invention; Namely all equalizations done according to content of the present invention change and modify, all by the claims in the present invention scope required for protection is contained.
Claims (7)
1. automobile current generator test macro, is characterized in that, comprises computing machine, modulate circuit, temperature control box, load box, generator drive unit and sensor transformation unit; Computing machine is connected with modulate circuit, temperature control box, load box and generator drive unit respectively; Modulate circuit is connected with load box, generator drive unit, sensor transformation unit respectively;
Described generator drive unit comprises variable-frequency motor, braking circuit and frequency converter, and variable-frequency motor, braking circuit and frequency converter connect successively, and frequency converter is connected with computing machine, modulate circuit respectively;
The speeds control of described computing machine to automobile current generator comprises opened loop control and closed-loop control; Described opened loop control, refers in process of the test, and computing machine controls frequency converter, by the running status of Frequency Converter Control variable-frequency motor according to preset requirement output order; Described closed-loop control, refers in process of the test, and computing machine is come in real time to frequency converter output order by the parameter reading variable-frequency motor, thus controls the running status of variable-frequency motor in real time.
2. automobile current generator test macro according to claim 1, is characterized in that, the parameter of described variable-frequency motor comprises voltage, electric current and rotating speed.
3. automobile current generator test macro according to claim 1, is characterized in that, described braking circuit comprises brake unit and braking resistor, and frequency converter, brake unit, braking resistor and variable-frequency motor connect successively.
4. automobile current generator test macro according to claim 1, is characterized in that, described computing machine is connected by I/O, A/D and serial communication circuit with between modulate circuit.
5. automobile current generator test macro according to claim 1, it is characterized in that, described modulate circuit comprises sensor group, filtering circuit, AD Acquisition Circuit, MCU controller and DAQ capture card, sensor group is connected with DAQ capture card, and sensor group, filtering circuit, AD Acquisition Circuit and MCU controller connect successively.
6. automobile current generator test macro according to claim 5, it is characterized in that, described sensor group comprises voltage sensor, current sensor and F/V sensor, voltage sensor, current sensor and F/V sensor are connected with DAQ capture card respectively, and F/V sensor, filtering circuit, AD Acquisition Circuit, MCU controller connect successively.
7. automobile current generator test macro according to claim 5, is characterized in that, described MCU controller adopts single-chip minimum system plate to realize.
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| CN201410568554.1A CN104267349A (en) | 2014-10-22 | 2014-10-22 | Automobile generator testing system |
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| CN201410568554.1A CN104267349A (en) | 2014-10-22 | 2014-10-22 | Automobile generator testing system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425149A (en) * | 2015-11-06 | 2016-03-23 | 中国科学院电工研究所 | Detection device for AC motor drive system |
| CN107144789A (en) * | 2017-07-07 | 2017-09-08 | 中国船舶重工集团公司第七0三研究所 | A kind of generating set test analysis tape deck |
| CN107167732A (en) * | 2017-06-20 | 2017-09-15 | 北京奥博汽车电子电器有限公司 | Automobile generator efficiency automatic testing equipment |
| CN107192950A (en) * | 2017-06-27 | 2017-09-22 | 北京奥博汽车电子电器有限公司 | Generator environment dynamic testing equipment |
| CN107561440A (en) * | 2017-07-24 | 2018-01-09 | 芜湖赛宝信息产业技术研究院有限公司 | A kind of New energy automobile motor overspeed test bench and test method |
| CN111766515A (en) * | 2020-07-08 | 2020-10-13 | 贵州航天林泉电机有限公司 | System and method for testing high-temperature high-speed starter generator system |
| RU201602U1 (en) * | 2019-08-30 | 2020-12-23 | Акционерное общество "Диаконт" | Frequency converter testing device |
| CN112946473A (en) * | 2021-03-04 | 2021-06-11 | 重庆隆鑫通航发动机制造有限公司 | Frequency conversion generator comprehensive test system based on temperature influence |
| RU223061U1 (en) * | 2023-12-07 | 2024-01-29 | Общество с ограниченной ответственностью "Уральский инжиниринговый центр" | Experimental stand for research testing a prototype of an electromechanical converter |
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| CN105425149A (en) * | 2015-11-06 | 2016-03-23 | 中国科学院电工研究所 | Detection device for AC motor drive system |
| CN107167732A (en) * | 2017-06-20 | 2017-09-15 | 北京奥博汽车电子电器有限公司 | Automobile generator efficiency automatic testing equipment |
| CN107192950A (en) * | 2017-06-27 | 2017-09-22 | 北京奥博汽车电子电器有限公司 | Generator environment dynamic testing equipment |
| CN107144789A (en) * | 2017-07-07 | 2017-09-08 | 中国船舶重工集团公司第七0三研究所 | A kind of generating set test analysis tape deck |
| CN107561440A (en) * | 2017-07-24 | 2018-01-09 | 芜湖赛宝信息产业技术研究院有限公司 | A kind of New energy automobile motor overspeed test bench and test method |
| RU201602U1 (en) * | 2019-08-30 | 2020-12-23 | Акционерное общество "Диаконт" | Frequency converter testing device |
| CN111766515A (en) * | 2020-07-08 | 2020-10-13 | 贵州航天林泉电机有限公司 | System and method for testing high-temperature high-speed starter generator system |
| CN111766515B (en) * | 2020-07-08 | 2022-11-04 | 贵州航天林泉电机有限公司 | System and method for testing high-temperature high-speed starter generator system |
| CN112946473A (en) * | 2021-03-04 | 2021-06-11 | 重庆隆鑫通航发动机制造有限公司 | Frequency conversion generator comprehensive test system based on temperature influence |
| RU223061U1 (en) * | 2023-12-07 | 2024-01-29 | Общество с ограниченной ответственностью "Уральский инжиниринговый центр" | Experimental stand for research testing a prototype of an electromechanical converter |
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