CN201964988U - Alternating-current electric dynamometer system - Google Patents
Alternating-current electric dynamometer system Download PDFInfo
- Publication number
- CN201964988U CN201964988U CN 201120006653 CN201120006653U CN201964988U CN 201964988 U CN201964988 U CN 201964988U CN 201120006653 CN201120006653 CN 201120006653 CN 201120006653 U CN201120006653 U CN 201120006653U CN 201964988 U CN201964988 U CN 201964988U
- Authority
- CN
- China
- Prior art keywords
- frequency converter
- control unit
- signal output
- main frame
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses an alternating-current electric dynamometer system. A collecting box is connected with an upper computer; the upper computer is connected with a single-chip microcomputer measure and control unit through an RS232 interface; the upper computer is connected with a frequency converter through an RS485 interface; a signal output terminal of the single-chip microcomputer measure and control unit is connected with a rotary power mechanism through an accelerator actuating mechanism; the rotary power mechanism is connected with a dynamometer main frame; a signal output terminal of a torque sensor in the dynamometer main frame is connected with the single-chip microcomputer measure and control unit; a signal output terminal of an encoder in the dynamometer main frame is connected with the frequency converter; a control signal input terminal and a control signal output terminal of the frequency converter are respectively connected with the single-chip microcomputer measure and control unit and the dynamometer main frame; and a measurement signal output terminal of the frequency converter is connected with the single-chip microcomputer measure and control unit through an operation control set unit. As the control structure of an asynchronous motor is simple, and the physical concept for processing control signals is clear, the torque response of the system is rapid, overstrike is avoided, and the system has high static and dynamic properties.
Description
Technical field
This novel application that relates to frequency converter, AC asynchronous motor and corollary system thereof in the power test field, it relates to the alternating current generator vector control theory, the correlation technique of Direct Torque Control and engine testing.
Background technology
Rotating machinery such as internal combustion engine, power of electric motor are measured and are mostly adopted water turbulence and electric eddy current dynamometer system to measure all the time.But the ultimate principle of waterpower, electric eddy current dynamometer is the mechanical energy that prime mover produces to be changed into heat energy heat is taken away after by water cooling, and the energy that prime mover sends can not reclaim, and has wasted the energy.Water turbulence and electric eddy current dynamometer all can only play loading in addition, cannot towing astern prime mover.Be difficult to realize that omnibearing test detects.All there are suitable moment of inertia in the 3rd water turbulence and electric eddy current dynamometer, and inertia is big, are difficult to satisfy more and more faster dynamic performance testing requirement.
The utility model content
The utility model provides a kind of electric A.C. dynamometer system, AC induction motor of being made up of frequency converter and variable-frequency motor etc. constitutes, its ultimate principle is the load of electric A.C. dynamometer as the power machine test, and utilization Direct Torque Control technology is carried out torque control to electric dynamometer.
The utility model is that the technical scheme that the deficiency that solves the problems of the technologies described above adopts is: a kind of electric A.C. dynamometer system, by host computer, vasculum, the scm observe and control unit, the power supply servo unit, throttle topworks, rotary power mechanism, frequency converter, operation control setup unit and dynamometer machine main frame are formed, vasculum links to each other with host computer, host computer links to each other with the scm observe and control unit by the RS232 interface, host computer links to each other with frequency converter by the RS485 interface, the signal output part of scm observe and control unit is connected with rotary power mechanism by throttle topworks, rotary power mechanism is connected with the dynamometer machine main frame, the signal output part of the torque sensor in the dynamometer machine main frame is connected with the scm observe and control unit, the signal output part of the scrambler in the dynamometer machine main frame is connected with frequency converter, the signal input end of frequency converter is connected with the dynamometer machine main frame with the scm observe and control unit respectively with control signal output ends, and the measuring-signal output terminal of frequency converter is connected to the scm observe and control unit by operation control setup unit.
Vasculum described in the utility model comprises line concentrating case, pyrostat, pressure transducer and low-temperature sensor.
The beneficial effects of the utility model are:
1, utilization vector control technology by magnetic linkage and the torque that the instantaneous space vector theory calculates motor, can carry out torque control to asynchronous motor, realizes the dynamometer machine function.
Can be in generating state when 2, making electric dynamometer, send electric energy back to electrical network by certain device.
3, because the control structure of asynchronous motor is simple, the physical concept that control signal is handled is clear and definite, and the torque response of system rapidly and non-overshoot has Gao Jing, dynamic property.
4, energy-conserving and environment-protective are arranged, inertia is low, and dynamic perfromance is good, load-bearing capacity is strong, can be converted into electric energy to the mechanical energy that prime mover produces feeds back to internal electric network, uses for miscellaneous equipment.Need not water-cooled oil cooling device; Easy to adjust; Equipment is simple, takes up an area of to lack, and inertia is low, does not have the influence of commutator, can be applicable to high-speed cruising; Can realize permanent torque characteristics from zero rotating speed to rated speed, rated speed to maximum speed is realized constant output characteristic; Realize two-way loading easily, and can be used as power and drag prime mover.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of vasculum of the present utility model;
Among the figure: 1, host computer, 2, vasculum, 3, the scm observe and control unit, 4, power supply servo unit, 5, throttle topworks, 6, rotary power mechanism, 7, dynamometer machine main frame, 8, pyrostat, 9, pressure transducer, 10, low-temperature sensor, 11, line concentrating case, 12, RS232 interface, 13, the RS485 interface, 14, operation control setup unit, 15, frequency converter.
Embodiment
As shown in the figure, a kind of electric A.C. dynamometer system, by host computer 1, vasculum 2, scm observe and control unit 3, power supply servo unit 4, throttle topworks 5, rotary power mechanism 6, frequency converter 15, operation control setup unit 14 and dynamometer machine main frame 7 are formed, vasculum 2 links to each other with host computer 1, host computer 1 links to each other with scm observe and control unit 3 by RS232 interface 12, host computer 1 links to each other with frequency converter 15 by RS485 interface 13, the signal output part of scm observe and control unit 3 is connected with rotary power mechanism 6 by throttle topworks 5, rotary power mechanism 6 is connected with dynamometer machine main frame 7, the signal output part of the torque sensor in the dynamometer machine main frame 7 is connected with scm observe and control unit 3, the signal output part of the scrambler in the dynamometer machine main frame 7 is connected with frequency converter 15, the signal input end of frequency converter 15 is connected with dynamometer machine main frame 7 with scm observe and control unit 3 respectively with control signal output ends, and the measuring-signal output terminal of frequency converter 15 is connected to scm observe and control unit 3 by operation control setup unit 14.
Described vasculum 2 comprises line concentrating case 11, pyrostat 8, pressure transducer 9 and low-temperature sensor 10, to pressure, high temperature, low temperature real-time parameter gather, the A/D conversion, by RS485 giving host computer with serial mode and handle, show with the signal gathered.
Described frequency converter is connected with electrical network, the mechanical energy that prime mover produces can be converted into electric energy and feed back to internal electric network, uses for miscellaneous equipment.
Described frequency converter 15 is selected PowerFlex700 type frequency converter for use, PowerFlex700 degree of regulation in the system of encoder feedback is arranged can reach 0.001% of base speed, this frequency converter is integrated with regeneration module and advanced linear filter, can carry out the electric energy feedback, be integrated with the IGBT rectifier bridge of intelligent power module, carry out the rotor vector controlled, can make machine shaft moment of torsion rising reaction time 1ms.
Scrambler in the described dynamometer machine main frame 7 is that the YGM506/1024 type incremental encoder that is installed in the YPT type ac variable-frequency electric motor is served as, and can guarantee that rotary speed precision reaches 0.001%.
The man-machine conversation terminal that 14 setup units are systems is controlled in described operation, is made up of eight cun color touch screens and related switch, button.Giving host computer after other setting value rough handling that it needs rotating speed, actual torque and control and in time show the actual value of various relevant control, setup parameter and various parameters, realize protection at any time, is an input and output display terminal of system.
Described torque sensor is selected the collection of JSC4-1000-1A torque sensor for use.It is a kind of high stability of being made by foil gauge, measuring accuracy can reach ± and 0.2%, the output square wave, level voltage 5V, its strain bridge power supply is by one group that the is located at sensor transformer that goes in ring, induced voltage is provided, be transformed into the supply voltage of the DC voltage of high stable as bridge pressure and internal circuit through rectifying and voltage-stabilizing, the torque signal of the millivolt level of foil gauge induction also is exaggerated into the strong signal of volt level simultaneously in inside, becoming the directly proportional square-wave signal through the V/F converter, be transmitted on the external signal receiver, be reduced into the square wave same frequency digital signal of changing out with V/F by decompress(ion) again.The interference free performance of system and the reliability of system are improved greatly.The measurement precision of torque holds good security.
Described scm observe and control unit 3 is a core with single-chip microcomputer (DSPIC30F6014A single-chip microcomputer), and DSPIC single-chip microcomputer stand TT﹠C system main task has two parts: a part is the function control of collection, processing, two-circuit and the two-parameter control of single loop digital PID and system's various characteristics of platform system actual value; Another part provides the port communication load-bearing capacity of q.s.Finish the open communication task of test-bed system, can hold the requirement of various peripheral hardwares, monitoring.Also to finish various essential Characteristics Control, realize open communication.Wherein: the setting value load module comprises speed setting circuit and torque setting circuit, both include an orthogonal encoder and a dsp chip, and the phase signal output terminal of orthogonal encoder, index pulse signal output terminal connect the corresponding A/D module input of corresponding dsp chip respectively; The digital signal output end of corresponding dsp chip connects the SPI interface of chip DSPIC30F6014A correspondence respectively; The CAN1 of main control chip, CAN2, UART interface link to each other with various peripheral hardwares on the stand, realize open stand function
The actual value signal of DSPIC single-chip microcomputer stand TT﹠C system collection has moment of torsion and throttle position signal.The actual value of throttle position is the analog quantity that is produced by the feedback potentiometer that is fixed in the topworks, the DSPIC single-chip microcomputer with its digitizing after, compare with setting value, difference is carried out the PID computing again, output quantity is become pwm signal go to control throttle topworks and move accurately.Torque signal is from the non-contact torque sensing device, after the DSPIC single-chip microcomputer is gathered its actual value, through processing of circuit, again with setting value relatively, difference is carried out the PID computing, the output of output torque close-loop feedback signal controlling frequency converter.
The setting of rotating speed, moment of torsion is to adopt N orthogonal encoder, M orthogonal encoder respectively, and respectively the DSPIC30F2010 digital signal controller by correspondence carries out record acquisition again, is received by the SPI port, sends into host computer in case of necessity again.The control of rotating speed, torque is adopted by the encoder feedback tach signal, and its actual value is sent into frequency converter, adorns in the use frequency converter
Surveying instruments such as fuel consumption meter, smoke intensity instrument, flowmeter link to each other with C1TX, the C1RX pin of main control chip DSPIC30F6014A by the CAN bus, carry out data communication with main control chip.
Host computer 1 is served as by industrial computer, and main task has four: the one, and internal combustion engine high and low temperature, pressure actual value digital signal, Processing Test data and demonstration, drafting trial curve, the output print test form of sending by vasculum and test various results.The 2nd, by wireless data transmission module the make progress wireless transmission of primary network station and acceptance test data and instruction, realize more data acquisition, transmission, monitoring, demonstration, the file of upper layer network.Wireless data transmission module and host computer carry out the serial communication exchange message by RS232.The 3rd, directly get in touch by the frequency converter of RS232 and RS485 and major loop, set the correlation parameter of tests such as rotating speed, moment of torsion, the control of conversion device moves on request.The 4th, carry out message exchange by the RS232 serial communication with singlechip computer system, test is finished in control system characteristic operation on demand.
Frequency converter and stand TT﹠C system communicate interconnected by the CAN bus, the stand TT﹠C system links to each other with host computer by RS232 again.Frequency converter is selected " Vector v3 " parameter group for use, and speed is regulated and torque adjustment is set by the stand TT﹠C system by communication mode by program parameters 088.
During system works, host computer (or the stand TT﹠C system can by with the communication setting of host computer, control of conversion device) give the frequency converter output order by RS232/RS485 from the characteristic of host computer output setting value and selection, drive asynchronous machine and carry out work.If what carry out is permanent rotary speed property control, be fixed on the scrambler that drives on the asynchronous machine main shaft and the actual value of rotating speed fed back to the input end of frequency converter, by software processes, the stable operation on the rotating speed of setting of the PID calculation control threephase asynchronous machine in frequency converter; If what carry out is constant torque characteristic control, the actual value of torque is fed back to the input end of stand TT﹠C system with the coaxial moment of torsion flange of asynchronous machine sensor, by soft, hardware handles, calculate adjusting through PID, as the setpoint torque of threephase asynchronous machine, the torque of control asynchronous machine is stabilized on the setting value.
During the test run, be installed in high temperature such as steel body temperature degree sensor on the internal combustion engine, the Adam module of signal in line concentrating case of importing and exporting low-temperature sensor such as water temperature and fuel oil, the actual output of engine oil pressure pickup is sent to host computer, carries out experimental data processing, preservation and demonstration.As required host computer by serial communication RS232 with the data of needs through wireless data transmission module (DTU) the wireless transmission test figure of primary network station and receive instruction upwards, realize more data acquisition, transmission, monitoring, demonstration, the file of upper layer network.When the needs output data, host computer drives printer and display screen shows, draws trial curve output print test form and tests various results.
Claims (2)
1. electric A.C. dynamometer system, it is characterized in that: by host computer (1), vasculum (2), scm observe and control unit (3), power supply servo unit (4), throttle topworks (5), rotary power mechanism (6), frequency converter (15), operation control setup unit (14) and dynamometer machine main frame (7) are formed, vasculum (2) links to each other with host computer (1), host computer (1) links to each other with scm observe and control unit (3) by RS232 interface (12), host computer (1) links to each other with frequency converter (15) by RS485 interface (13), the signal output part of scm observe and control unit (3) is connected with rotary power mechanism (6) by throttle topworks (5), rotary power mechanism (6) is connected with dynamometer machine main frame (7), the signal output part of the torque sensor in the dynamometer machine main frame (7) is connected with scm observe and control unit (3), the signal output part of the scrambler in the dynamometer machine main frame (7) is connected with frequency converter (15), the signal input end of frequency converter (15) is connected with dynamometer machine main frame (7) with scm observe and control unit (3) respectively with control signal output ends, and the measuring-signal output terminal of frequency converter (15) is connected to scm observe and control unit (3) by operation control setup unit (14).
2. a kind of electric A.C. dynamometer according to claim 1 system, it is characterized in that: described vasculum (2) comprises line concentrating case (11), pyrostat (8), pressure transducer (9) and low-temperature sensor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120006653 CN201964988U (en) | 2011-01-11 | 2011-01-11 | Alternating-current electric dynamometer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120006653 CN201964988U (en) | 2011-01-11 | 2011-01-11 | Alternating-current electric dynamometer system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201964988U true CN201964988U (en) | 2011-09-07 |
Family
ID=44527532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120006653 Expired - Lifetime CN201964988U (en) | 2011-01-11 | 2011-01-11 | Alternating-current electric dynamometer system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201964988U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401712A (en) * | 2011-09-29 | 2012-04-04 | 武汉华中数控股份有限公司 | Loading device of electric dynamometer |
| WO2013097374A1 (en) * | 2011-12-28 | 2013-07-04 | 湖南三一智能控制设备有限公司 | Electric dynamometer |
| CN104931174A (en) * | 2015-05-17 | 2015-09-23 | 成都诚邦动力测试仪器有限公司 | Bootstrap control circuit-based electric eddy current power-measuring system |
| CN104931173A (en) * | 2015-05-17 | 2015-09-23 | 成都诚邦动力测试仪器有限公司 | Energy-saving electric eddy current power-measuring system |
| CN104931172A (en) * | 2015-05-17 | 2015-09-23 | 成都诚邦动力测试仪器有限公司 | Current vortex power measuring system based on constant current source circuit |
| CN111076938A (en) * | 2019-12-30 | 2020-04-28 | 凯迈(洛阳)机电有限公司 | Control method of starter load control system based on electric dynamometer |
-
2011
- 2011-01-11 CN CN 201120006653 patent/CN201964988U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401712A (en) * | 2011-09-29 | 2012-04-04 | 武汉华中数控股份有限公司 | Loading device of electric dynamometer |
| WO2013097374A1 (en) * | 2011-12-28 | 2013-07-04 | 湖南三一智能控制设备有限公司 | Electric dynamometer |
| CN104931174A (en) * | 2015-05-17 | 2015-09-23 | 成都诚邦动力测试仪器有限公司 | Bootstrap control circuit-based electric eddy current power-measuring system |
| CN104931173A (en) * | 2015-05-17 | 2015-09-23 | 成都诚邦动力测试仪器有限公司 | Energy-saving electric eddy current power-measuring system |
| CN104931172A (en) * | 2015-05-17 | 2015-09-23 | 成都诚邦动力测试仪器有限公司 | Current vortex power measuring system based on constant current source circuit |
| CN111076938A (en) * | 2019-12-30 | 2020-04-28 | 凯迈(洛阳)机电有限公司 | Control method of starter load control system based on electric dynamometer |
| CN111076938B (en) * | 2019-12-30 | 2024-04-26 | 凯迈(洛阳)机电有限公司 | Control method of starter load control system based on electric dynamometer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201964988U (en) | Alternating-current electric dynamometer system | |
| CN101388637B (en) | Dual feed-back wind power generator robust controlling method having feed-forward compensation | |
| CN204495970U (en) | Energy-saving of motor system test platform | |
| CN100573084C (en) | Automobile gearbox loads and detects testing table | |
| CN201972199U (en) | Automatic constant pressure device in water supply system | |
| CN205562093U (en) | Rotating electrical machines torque force testing device | |
| CN101425777A (en) | Voltage orienting frequency conversion controller for open loop non-speed sensor | |
| CN103560735A (en) | Control method for electro-magnetic synchronous motor | |
| CN110109439A (en) | A kind of test macro of New energy automobile motor and controller | |
| CN204241650U (en) | A kind of motor test oil pumper alternate load loading control | |
| CN1290856A (en) | Measurement of engine mechanical efficiency and back drawing test system | |
| CN103558548A (en) | Multifunctional servo motor performance testing device and testing system thereof | |
| CN201278014Y (en) | Network group control integrated test system for high voltage large-medium-sized motor | |
| CN203204895U (en) | Moving die bidirectional wind power energy conversion experiment platform based on double-fed generator | |
| CN209148845U (en) | A kind of driving control system for electric machine efficiency Detecting data frame based on power control | |
| CN201859178U (en) | Metering device for harmonic electric energy | |
| CN203732278U (en) | Electric automobile electric drive condition simulation test system | |
| CN104091501B (en) | Energy based on permanent-magnetic wind driven generator conversion dynamic model experiment platform and test method | |
| CN102540075A (en) | Loading performance test device for generator unit | |
| CN100561856C (en) | A kind of experimental simulation system of variable speed constant frequency dual feed wind generator | |
| CN108169691B (en) | Multifunctional electric tractor test bed based on CAN communication and test method thereof | |
| CN1587937A (en) | Direct current power ergometer and its control system | |
| CN205539389U (en) | Energy -saving boats and ships load analogue means | |
| CN102420557B (en) | Four-quadrant-operation-based propeller simulation device and simulation method thereof | |
| CN103808453B (en) | There is in bandwidth of operation the electromagnetic exciter of amplitude self-stabilization sine-wave excitation power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110907 |