CN104122887A - Three-phase alternating-current traction motor controller loading test platform and control method thereof - Google Patents
Three-phase alternating-current traction motor controller loading test platform and control method thereof Download PDFInfo
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Abstract
The invention discloses a three-phase alternating-current traction motor controller loading test platform and a control method thereof. An adjustable transformer is adopted, the pressure regulating range is between 200VAC and 1,500 VAC, various three-phase motor voltage levels can be adapted, and the platform generality is enhanced. A motor controller and a tested motor are taken as tested objects, and the motor controller is used for controlling the tested motor and can be used for realizing control over the rotating speed and the torque. A torque sensor is used for measuring the loading torque. A loading motor can be generally applied to a 380VAC three-phase alternating-current variable-frequency motor, and is easy to purchase, maintain and repair; a four-quadrant converter and an active filter construct an energy feedback way, energy can be fed back to a 380VAC power grid when the loading motor runs in a power generation way, a purification and filtering function for restraining basic radio interference is realized, and the national standard is met. A testing host machine is connected to the motor controller and the four-quadrant converter through a communication bus, the numerical values of torque and rotating speed sensors are acquired, and automatic testing of the loading characteristics of the motor controller is realized by setting a control flow.
Description
Technical field
The invention belongs to electric wheel mining vehicle three-phase AC traction electric machine controller field tests, more specifically, relate to a kind of three-phase AC traction electric machine controller and load test platform and control method thereof.
Background technology
The motor that electric wheel mining vehicle adopts is generally the high power AC traction motor of special manufacture, and power is all more than 100KW, and operating voltage is generally 660VAC or 1040VAC.Vehicle mounted electric machine controller, must be on ground in the face of it carries out loading performance test before assembling is got on the bus.Ground loads test and is included under several feature alternating voltage input conditions, the torque and rotational speed curve in different loads situation, and torque and velocity control accuracy.In addition, for after meeting equipment and once dropping into, can meet the performance test requirement of the electric machine controller of Multiple Type specification, ground test platform also has the requirement of versatility.
In test platform system, form a tested electric machine control system by the traction electric machine of electric machine controller and its control.Frequency converter by loading motor and controlled loading motor forms loading motor system.In the time electric machine controller being loaded to test, must meet energy-conservation requirement, test platform system has energy feedback type design, realizes electricity sealing.In addition, load test platform system and there is autorun, adopt computing machine to carry out integrated control, automatically complete test event.According to test event and testing process, by communication port control electric machine controller and loading motor frequency conversion system, the sensor combinations such as configuration voltages, electric current, torque, temperature, speed, the function of implementing to draw test curve and save data.
Load field tests at motor, be normally configured by 380VAC AC network, do not there is the ability that different voltage is adjusted that adapts to.Motor loads and all adopts same model to carry out with the motor of voltage, takes the energy feedback mode of direct current common bus, can not meet the demand of the different voltage motors of test.
Summary of the invention
For the defect of prior art, the object of the present invention is to provide a kind of three-phase AC traction electric machine controller to load test platform, be intended to solve the technical matters that can not meet the demand of the motor of the different voltages of test in prior art.
The invention provides a kind of three-phase AC traction electric machine controller and load test platform, comprise: transtat, rectifier, electric machine controller, by measured motor, loading motor, four-quadrant frequency converter, active filter, the first shaft coupling, the second shaft coupling, torque rotary speed sensor and Test Host; The input end of described transtat connects AC network; The input end of described rectifier connects the output terminal of described transtat; The direct-flow input end of described electric machine controller connects the output terminal of described rectifier; The three-phase output end of described electric machine controller connects described by measured motor; Describedly also be connected to described loading motor by described the first shaft coupling, described torque rotary speed sensor and described the second shaft coupling successively by measured motor; Described loading motor is also connected with described four-quadrant frequency converter; Described four-quadrant frequency converter is connected with described active filter; Described active filter is connected with described AC network; Described Test Host is connected with described electric machine controller by CAN bus, and described Test Host is connected with described four-quadrant frequency converter by RS422 serial communication interface, and described Test Host is connected with described torque rotary speed sensor by RS232 serial communication interface.
Wherein, described power and voltage by the power of measured motor and voltage and described electric machine controller matches.
Wherein, the power of described loading motor has the surplus of 10%-20%.
Wherein, the voltage adjusting range of described transtat is 200VAC to 1500VAC.
Wherein, described the first shaft coupling is identical with the structure of described the second shaft coupling, comprises the first half a coupler, joint spider, the second half a coupler and universal joint; Described the first half a coupler is spline, for being connected by measured motor and described loading motor with described, described the second half a coupler is ring flange, and for being connected with described torque rotary speed sensor, described joint spider is connected described spline and described ring flange with described universal joint.
The present invention also provides a kind of three-phase AC traction electric machine controller described above to load the control method of test platform, comprises the steps:
(1) control respectively described electric machine controller by Test Host and described four-quadrant frequency converter is operated in Torque Control mode, and contrary by the sense of rotation of measured motor and loading motor; And the maximum speed of controlling two motors is that n is to avoid motor to occur overspeed condition;
(2) be test required voltage V by regulating transtat to make the alternating voltage of described transtat output, and export three-phase alternating voltage; Be 0.05T by four-quadrant frequency converter output torque described in described Test Host control, and start its work;
(3) be 0.1T by the output torque of electric machine controller described in Test Host control, and start its work;
(4) progressively accelerate to rated speed n by tested driven by motor loading motor; In this process, by rotating speed and the torque data of torque rotary speed sensor test described in Test Host Real-time Obtaining;
(5) Test Host judges that now torque is whether between 0.05T and 0.1T, and whether the difference of rotating speed and rated speed n is between ± 2%n; If meet above-mentioned two conditions simultaneously, Test Host is proceeded subsequent load test; If not Test Host judgement loads test platform and has fault, interrupt test;
(6) be T/m by the output torque of four-quadrant frequency converter described in described Test Host control; And being slightly larger than T/m by electric machine controller output torque described in described Test Host control, loading moment T is divided into m equal portions; M is more than or equal to 2 positive integer;
(7) by rotating speed and the torque data of torque rotary speed sensor test described in described Test Host Real-time Collection, and relatively whether torque is T/m, whether rotating speed is n, if meet simultaneously, enter step (8), otherwise electric machine controller and four-quadrant frequency converter shutdown described in Test Host control;
(8) increase the output torque for controlling electric machine controller 4 and four-quadrant frequency converter 10 by Test Host, increase is T/m, and repeating step (6) and step (7) are until loading moment enters step (9) while reaching T;
(9) Test Host obtains and records output current, the voltage waveform of electric machine controller, electric machine controller internal work temperature and tested motor internal working temperature.
Wherein, described control method also comprises that loading stops step (10): Test Host first reduces the output torque of electric machine controller to T/3, and in the time that rotating speed drops to n/10, then the output torque that reduces loading motor is to T/3; Finally stop electric machine controller work, stop subsequently four-quadrant frequency converter work.
Wherein, in step (6), what the output torque of described electric machine controller exceeded T/m exceeds proportional range in 5%.
Wherein, described in step (8), increase T/m is no more than 500 Ns. rice.
Feature of the present invention is embodied in:
(1) transformer adopting transtat of the present invention, can, for the testing requirement of electric wheel mining vehicle electric machine controller, arrange different three-phase output voltages, to examine the performance of electric machine controller under different voltage condition.
(2) electric machine controller that the present invention builds loads test platform system, electric machine controller and motor model that can compatible different voltage levels by measured motor, and if 380VAC is to 1140VAC, versatility, applicability are good.
(3) the present invention can the phase asynchronous alternating current generator of general 380VAC as loading motor, select widely, be easy to buying, care and maintenance;
(4) the present invention adopts four-quadrant frequency converter and active filter to form energy feedback mode, in the time that loading motor does generation mode operation, energy back, to 380VAC electrical network, and is had to the purification filter function that basic radio interference suppresses, meet national standard.
(5) the present invention arranges a Test Host, be connected on electric machine controller and four-quadrant frequency converter by communication bus, and Real-time Collection torque rotary speed sensor numerical value, frequency acquisition is not less than 10Hz.Test Host, by control flow is set, is realized the automatic test to electric machine controller loading characteristic by testing software.
Brief description of the drawings
Fig. 1 is the theory diagram that the three-phase AC traction electric machine controller that provides of the embodiment of the present invention loads test platform;
Wherein, 1 is three-phase 380V AC network, and 2 is transtat, and 3 is rectifier, and 4 is electric machine controller, 5 is by measured motor, and 6 is the first shaft coupling, and 7 is torque rotary speed sensor, and 8 is the second shaft coupling, 9 is loading motor, and 10 is four-quadrant frequency converter, and 11 is active filter, and 12 is Test Host.
Fig. 2 is the Test Host circuit diagram that the embodiment of the present invention provides:
Wherein, 12-1 is an industrial computer, and 12-2 is CAN bus communication circuit, and 12-3 is RS422 serial communication circuit, and 12-4 is RS232 serial communication circuit.
Fig. 3 is the coupler structure figure that the embodiment of the present invention provides:
Wherein, 6-1 is half a coupler (female spline), and connecting motor output shaft end 5 and 9,6-2 is joint spider, and 6-3 is half a coupler (ring flange), connects torque rotary speed sensor 7, and 6-4 is universal joint.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of loading test platform system of electric machine controller, the motor of realizing different voltage condition loads test request, and can realize energy feedback, reduces energy consumption.
Electric wheel mining vehicle three-phase AC traction electric machine controller provided by the invention loads test platform and comprises: transtat 2, rectifier 3, electric machine controller 4, by measured motor 5, loading motor 9, four-quadrant frequency converter 10, active filter 11, the first shaft coupling 6, the second shaft coupling 8, torque rotary speed sensor 7 and Test Host 12.Interconnected by shaft joint and torque rotary speed sensor by measured motor and loading motor.
Transtat 2 is inputted termination 380V AC network 1; Rectifier 3 is inputted the output terminal of termination transtat 2; The direct-flow input end of electric machine controller 4 connects the output terminal of rectifier 3; The three-phase output end of electric machine controller 4 connects by measured motor 5; Be connected to loading motor 9 by the first shaft coupling 6, torque rotary speed sensor 7 and the second shaft coupling 8 successively by measured motor 5; Loading motor 9 is connected with four-quadrant frequency converter 10; Four-quadrant frequency converter 10 is connected with active filter 11; Active filter 11 is connected with three-phase 380V AC network 1.
In the present invention, Test Host 12 and electric machine controller 4 by CAN bus communication circuit be connected, with four-quadrant frequency converter 10 by RS422 serial communication circuit be connected, torque rotary speed sensor 7 is connected by RS232 serial communication circuit; Can be adopted the ac three-phase asynchronous motor with different voltages by measured motor 5, loading motor 9 is for providing loading moment, and can adopt rated voltage is 380VAC ac three-phase asynchronous motor.By the power of measured motor 5 and voltage need with the power of electric machine controller 4 and voltage matches.Loading motor 9 can be chosen the motor of 380VAC, and the power of loading motor 9 should have certain surplus, can be generally the surplus of 10%-20%.Electric machine controller 4 has torque speed controlling function; Electric machine controller 4 has communication port; Transtat 2 has termination 380V AC network one time, and secondary terminals output voltage can be adjusted; Setting range is 200VAC to 1500VAC.
Feature of the present invention is embodied in:
(1) transformer adopting transtat of the present invention, can, for the testing requirement of electric wheel mining vehicle electric machine controller, arrange different three-phase output voltages, to examine the performance of electric machine controller under different voltage condition.
(2) electric machine controller that the present invention builds loads test platform system, electric machine controller and motor model that can compatible different voltage levels by measured motor, and if 380VAC is to 1140VAC, versatility, applicability are good.
(3) the present invention can the phase asynchronous alternating current generator of general 380VAC as loading motor, select widely, be easy to buying, care and maintenance;
(4) the present invention adopts four-quadrant frequency converter and active filter to form energy feedback mode, in the time that loading motor does generation mode operation, energy back, to 380VAC electrical network, and is had to the purification filter function that basic radio interference suppresses, meet national standard.
(5) the present invention arranges a Test Host, be connected on electric machine controller and four-quadrant frequency converter by communication bus, and Real-time Collection torque rotary speed sensor numerical value, frequency acquisition is not less than 10Hz.Test Host, by control flow is set, is realized the automatic test to electric machine controller loading characteristic by testing software.
The situation of motor being carried out to nominal load loading, control flow is described below, and other loading condition can implement:
Test condition is alternating voltage V, loading moment T, rated speed n.According to load test moment actual size, T is divided into m equal portions, successively increase progressively the loading moment applying, T/m is no more than 500N.m.
1. by Test Host, electric machine controller 4 is set respectively and four-quadrant frequency converter 10 is operated in Torque Control mode, control method can adopt vector control technology or direct moment control technology, should be contrary by measured motor 5 and loading motor 9 sense of rotation.And the maximum speed that two motors are set is that n is to avoid motor to occur overspeed condition.
2. the alternating voltage that transtat 1 is exported is set to test required voltage V, and exports three-phase alternating voltage; It is 0.05T that Test Host 12 arranges four-quadrant frequency converter 10 output torques, and starts its work.
3. by CAN bus, electric machine controller 4 output torques to be set be 0.1T to Test Host 12, and start its work.
4. driven loading motor 9 progressively to accelerate to rated speed n by measured motor 5.In this process, Test Host 12 does not stop to read rotating speed and the torque real time data that torque rotary speed sensor 7 is tested, and on the display of Test Host 12, draws taking the time as horizontal ordinate the real-time curve that torque rotary speed is ordinate.
5. step 2 to step 4 is the trial run of little moment, and Test Host 12 judges that now torque is whether between 0.05T and 0.1T, and whether the difference of rotating speed and rated speed n is between ± 2%n.If so, Test Host 12 is proceeded subsequent load test.If not there is fault, interrupt test in a certain equipment that Test Host 12 judgements load test platform.
6. the output torque of four-quadrant frequency converter 10 is set is T/m to Test Host 12.Test Host 12 arranges electric machine controller 4 output torques should slightly exceed T/m, exceeds proportional range in 5%.
7. Test Host 12 Real-time Collection torque rotary speed sensors 7 are tested rotating speed and torque real time data, and on the display of Test Host 12, draw taking the time as horizontal ordinate the real-time curve that torque rotary speed is ordinate.Whether the comparison torque of Test Host 12 testing softwares is T/m, whether n of rotating speed, and test error gets ± and 2%.Satisfy condition and carry out next step, otherwise Test Host 12 sends halt command to electric machine controller 4 and four-quadrant frequency converter 10.
8. Test Host 12 increases the output torque arranging to electric machine controller 4 and four-quadrant frequency converter 10, and increase is T/m, and repeating step 6 and step 7, until loading moment reaches T.
9. now loading test platform of the present invention has completed the loading of test condition.Test Host 12 is obtained and is recorded output current, the voltage waveform of electric machine controller 4, the parameters such as electric machine controller internal work temperature and tested motor internal working temperature by CAN bus.
10. while loading test shutdown, should ensure that energy progressively drops to reduced levels, rotating speed also wants falling tone to reduced levels.Shutdown adopts step below: Test Host 12 first reduces the output torque of electric machine controller 4 to T/3, and in the time that rotating speed drops to n/10, then the output torque that reduces loading motor 9 is to T/3; Finally stop electric machine controller 4 and work, stop subsequently four-quadrant frequency converter 10 and work.
As Fig. 1, electric wheel mining vehicle electric machine controller ground loads test platform system and comprises: transtat, rectifier, electric machine controller, tested motor, shaft coupling, torque rotary speed sensor, loading motor, four-quadrant frequency converter, active filter, Test Host.
Termination 380V AC network of transtat; Rectifier input connects transtat secondary output terminal; The direct-flow input end of electric machine controller connects the output terminal of rectifier; The three-phase output end of electric machine controller is received by measured motor; Electric machine controller has torque speed controlling function; Electric machine controller has communication port; Be connected to loading motor by measured motor by shaft coupling and torque rotary speed sensor; Loading motor is connected with four-quadrant frequency converter; Four-quadrant frequency converter is connected with wave filter; Wave filter is connected with three-phase 380V AC network; Test Host is connected by communication port with electric machine controller, four-quadrant frequency converter; Test Host is also connected with torque rotary speed sensor; Be by measured motor and loading motor the AC induction motor that rotating speed coder is installed.
Transtat is by loading test voltage requirement, by 380V AC voltage conversion to electric machine controller and by measured motor required voltage; The three-phase alternating current of transformer output exports rectifier to, is transformed to DC voltage by rectifier.Rectifier inside comprises 6 diodes and an electric capacity forms without control full-wave rectifying circuit.The steering order that electric machine controller sends by communication port according to Test Host, is three-phase alternating current by the DC inverter of rectifier input, controls tested electric machine rotation;
Loading motor drives control by four-quadrant frequency converter.Described four-quadrant frequency converter has communication port, and this communication port is connected on Test Host; Test Host sends instruction to four-quadrant frequency converter by communication port, by four-quadrant frequency converter, loading motor is carried out to torque control, realizes the control to locked-in torque.
Driven loading motor to rotate by measured motor by shaft coupling, loading motor is operated in generating state; Described four-quadrant frequency converter possesses energy feedback function.
Four-quadrant frequency converter is connected with 380V AC network by an active filter.
Active filter possesses wireless electron to be disturbed and electrical network purification filtering function, and the energy of guaranteeing to feed back electrical network can be by complete absorption.
The energy that loading motor produces exports active filter to through four-quadrant frequency converter, after active filter shaping purifies, exports three-phase alternating current electrical network to; This energy is exported to again electric machine controller and is used after transtat, has realized AC energy feedback.
Load test platform system in the time loading test, electric machine controller and absorbed energy from AC network by measured motor, this mechanical energy is converted to electric energy by loading motor, feeds back to AC network, thereby form an energy recycling passage, greatly reduced work energy consumption.
In embodiments of the present invention, be the ac three-phase asynchronous motor with rotating speed coder by measured motor and loading motor.Tested motor model specification is the same with the actual controlled device of electric wheel mining vehicle electric machine controller.Loading motor can be chosen the motor of 380VAC, and power requirements need to be a bit larger tham by the power of measured motor; The shaft coupling adopting should be designed to the version with universal joint, avoids the alignment precision damage to motor when inadequate that is rigidly connected of 2 motors.
As shown in Figure 2, Test Host comprises industrial computer 12-1, CAN bus communication circuit 12-2, RS422 telecommunication circuit 12-3, RS232 telecommunication circuit 12-4.The upper operation of industrial computer 12-1 testing software, according to control flow work, and record test data.Industrial computer 12-1 is connected with electric machine controller 4 by CAN bus communication circuit 12-2, and information transmission with it.Industrial computer is connected with four-quadrant frequency converter 10 by RS422 telecommunication circuit 12-3, carries out parameter setting.Industrial computer is connected with torque rotary speed sensor 7 by RS232 telecommunication circuit 12-4, Real-time Collection test data.
As shown in Figure 3, the first shaft coupling 6 and the second shaft coupling 9 main compositions are: the first half a coupler (spline) 6-1, joint spider 6-2, the second half a coupler (ring flange) 6-3, universal joint 6-4.Wherein, half a coupler (spline) 6-1 be connected by measured motor 5 and loading motor 9, (ring flange) 6-3 is connected with torque rotary speed sensor 7, joint spider 6-2 is connected two half a couplers with universal joint 6-4.The shaft coupling of this kind of version allows to rotate in certain angular range in the time of docking rotation, the damage can avoid direct dock shaft coupling installation accuracy not high enough time, motor shaft being produced.The motor of the relatively high power that is specially adapted to the present invention relates to loads test platform field.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a three-phase AC traction electric machine controller loads test platform, it is characterized in that, comprise: transtat (2), rectifier (3), electric machine controller (4), by measured motor (5), loading motor (9), four-quadrant frequency converter (10), active filter (11), the first shaft coupling (6), the second shaft coupling (8), torque rotary speed sensor (7) and Test Host (12);
The input end of described transtat (2) connects AC network (1); The input end of described rectifier (3) connects the output terminal of described transtat (2); The direct-flow input end of described electric machine controller (4) connects the output terminal of described rectifier (4); The three-phase output end of described electric machine controller (4) connects described by measured motor (5); Describedly also be connected to described loading motor (9) by described the first shaft coupling (6), described torque rotary speed sensor (7) and described the second shaft coupling (8) successively by measured motor (5); Described loading motor (9) is also connected with described four-quadrant frequency converter (10); Described four-quadrant frequency converter (10) is connected with described active filter (11); Described active filter (11) is connected with described AC network (1);
Described Test Host (12) is connected with described electric machine controller (4) by CAN bus, described Test Host (12) is connected with described four-quadrant frequency converter (10) by RS422 serial communication interface, and described Test Host (12) is connected with described torque rotary speed sensor (7) by RS232 serial communication interface.
2. loading test platform as claimed in claim 1, is characterized in that, described power and voltage by the power of measured motor (5) and voltage and described electric machine controller (4) matches.
3. loading test platform as claimed in claim 1, is characterized in that, the power of described loading motor (9) has the surplus of 10%-20%.
4. loading test platform as claimed in claim 1, is characterized in that, the voltage adjusting range of described transtat (2) is 200VAC to 1500VAC.
5. loading test platform as claimed in claim 1, is characterized in that, described the first shaft coupling (6) is identical with the structure of described the second shaft coupling (8), comprises the first half a coupler, joint spider, the second half a coupler and universal joint;
Described the first half a coupler is spline, for being connected by measured motor (5) and described loading motor (9) with described, described the second half a coupler is ring flange, for being connected with described torque rotary speed sensor (7), described joint spider is connected described spline and described ring flange with described universal joint.
6. three-phase AC traction electric machine controller as claimed in claim 1 loads a control method for test platform, it is characterized in that, comprises the steps:
(1) control respectively described electric machine controller by Test Host and described four-quadrant frequency converter is operated in Torque Control mode, and contrary by the sense of rotation of measured motor and loading motor; And the maximum speed of controlling two motors is that n is to avoid motor to occur overspeed condition;
(2) be test required voltage V by regulating transtat to make the alternating voltage of described transtat output, and export three-phase alternating voltage; Be 0.05T by four-quadrant frequency converter output torque described in described Test Host control, and start its work;
(3) be 0.1T by the output torque of electric machine controller described in Test Host control, and start its work;
(4) progressively accelerate to rated speed n by tested driven by motor loading motor; In this process, by rotating speed and the torque data of torque rotary speed sensor test described in Test Host Real-time Obtaining;
(5) Test Host judges that now torque is whether between 0.05T and 0.1T, and whether the difference of rotating speed and rated speed n is between ± 2%n; If meet above-mentioned two conditions simultaneously, Test Host is proceeded subsequent load test; If not Test Host judgement loads test platform and has fault, interrupt test;
(6) be T/m by the output torque of four-quadrant frequency converter described in described Test Host control; And being slightly larger than T/m by electric machine controller output torque described in described Test Host control, loading moment T is divided into m equal portions; M is more than or equal to 2 positive integer;
(7) by rotating speed and the torque data of torque rotary speed sensor test described in described Test Host Real-time Collection, and relatively whether torque is T/m, whether rotating speed is rated speed n, if meet simultaneously, enter step (8), otherwise electric machine controller and four-quadrant frequency converter shutdown described in Test Host control;
(8) increase the output torque for controlling electric machine controller 4 and four-quadrant frequency converter 10 by Test Host, increase is T/m, and repeating step (6) and step (7) are until loading moment enters step (9) while reaching T;
(9) Test Host obtains and records output current, the voltage waveform of electric machine controller, electric machine controller internal work temperature and tested motor internal working temperature.
7. control method as claimed in claim 6, is characterized in that, described control method also comprises that loading stops step (10):
Test Host first reduces the output torque of electric machine controller to T/3, and in the time that rotating speed drops to n/10, then the output torque that reduces loading motor is to T/3; Finally stop electric machine controller work, stop subsequently four-quadrant frequency converter work.
8. control method as claimed in claim 6, is characterized in that, in step (6), what the output torque of described electric machine controller exceeded T/m exceeds proportional range in 5%.
9. control method as claimed in claim 6, is characterized in that, described in step (8), increase T/m is no more than 500 Ns. rice.
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| CN201410367945.7A CN104122887B (en) | 2014-07-29 | A kind of three-phase AC traction electric machine controller loads the control method of test platform |
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