CN203117392U - Motor back-to-back test platform for motor tests - Google Patents
Motor back-to-back test platform for motor tests Download PDFInfo
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- CN203117392U CN203117392U CN 201320067110 CN201320067110U CN203117392U CN 203117392 U CN203117392 U CN 203117392U CN 201320067110 CN201320067110 CN 201320067110 CN 201320067110 U CN201320067110 U CN 201320067110U CN 203117392 U CN203117392 U CN 203117392U
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Abstract
The utility model discloses a motor back-to-back test platform for motor tests, which comprises a transformer, a rectifier, a filter, a tested motor, a master control system, a load motor, a shaft coupling and two motor control systems. The rectifier is connected with the transformer, two ends of the filter are respectively connected with two output ends of the rectifier, each of the tested motor control system and the load motor control system is connected with the rectifier and the filter, the load motor is connected with the load motor control system, an output shaft of the detected motor is connected with an output shaft of the load motor via the shaft coupling, and both the tested motor control system and the load motor control system are connected with the master control system. According to the motor back-to-back test platform for the motor tests disclosed by the utility model, the whole system can be miniaturized, the motors can output any torques so that motor back-to-back tests are more diversified, electric energy is saved, and efficiency is obviously improved.
Description
Technical field
The utility model relates to a kind of motor for electromechanical testing to dragging platform.
Background technology
In modern electrical machine test, need carry out long-time performance verification to motor, particularly have under the loading condition and the performance verification under the condition of load changing even more important.Used loading problem when therefore solving the motor operation just becomes the most important thing of Motor Measuring System.
At present, the load that traditional electromechanical testing platform adopts has following several form: the one, come fictitious load with Dyn. and power resistor, and come consumed energy; The 2nd, adopt synchronous motor and Dyn. and grid-connecting apparatus as load, energy is restored to electrical network; The 3rd, adopt dynamometer machine as load, this also is the practice of main flow more.
More than several its load form, though can both well finish load task as motor performance test, the problem that existence simultaneously is such or such and shortcoming.Primary is exactly energy problem, for first kind and the third mode, energy is all consumed by power resistor or motor internal, energy saving and economy are not high for needs are used for the system of electromechanical testing for a long time, and second method feeds back to electrical network with energy, electrical network is had harmonic pollution, and power factor is low.Secondly, above several method has system huge, and control is complicated, the shortcoming that efficient is lower.
In order to overcome above shortcoming and problem, motor has been proposed to dragging platform testing system, be characterized in making two motors mechanically to be coupled with electric going up mutually, two motor loads each other, thus solved problems such as energy resource consumption, and system complex.At present, the method has had widespread use on direct current generator and asynchronous machine, the structure diagram that drags system is seen Fig. 1.
Yet, the develop rapidly of making along with permagnetic synchronous motor, and based on the research and development of the frequency-variable controller of permagnetic synchronous motor, it is used more and more widely, the permagnetic synchronous motor system testing that has frequency-variable controller becomes more noticeable.So we as being introduced motor to dragging the method for platform test by measured motor, reach the purpose to the permagnetic synchronous motor test with the permagnetic synchronous motor system.
Existing with permagnetic synchronous motor as by the motor of measured motor to dragging platform, load motor generally adopts AC induction motor.And the general volume of AC induction motor is bigger, by measured motor if very little permagnetic synchronous motor, physical connection and inharmonious then.And AC induction motor is slower in torque adjustment control response.Simultaneously, need be operated in generating state as load motor, AC induction motor causes overall system efficiency to descend because itself motor characteristic determines that in case system operates in slow-speed of revolution situation, generating efficiency is extremely low.
The utility model content
The utility model is the weak point that exists in the above-mentioned prior art for avoiding, and provides a kind of motor for electromechanical testing to dragging platform, to improve testing efficiency, the energy savings of motor.
The utility model be the technical solution problem by the following technical solutions.
The motor that is used for electromechanical testing is to dragging platform, and its design feature is, comprises transformer, rectifier, wave filter, by measured motor, master control system, load motor, shaft coupling and two electric machine control systems; Describedly be connected with one of them electric machine control system by measured motor, described load motor is connected with described another electric machine control system;
The primary winding of described transformer is connected on the AC network; Described rectifier is connected on the secondary coil of transformer; The two ends of described wave filter are connected on two output terminals of described rectifier; Describedly all be connected with wave filter with described rectifier by the electric machine control system of the electric machine control system of measured motor and described load motor; Be connected by shaft coupling between the output shaft of described tested motor output shaft and described load motor; Described tested electric machine control system all is connected with described master control system with the load motor control system; The described rotary encoder that is connected with on the electric machine control system of measured motor for the tested motor rotor position information of test; Be connected with the rotary encoder for test load motor rotor position information on the electric machine control system of described load motor.
Motor for electromechanical testing of the present utility model also is the design feature of dragging platform:
Described tested electric machine control system all is connected with described master control system by the CAN bus with the load motor control system.
Described wave filter is filter capacitor.
Described electric machine control system by measured motor comprises capacitor C 1, filter capacitor E1, frequency converter and controller; Described capacitor C 1 is connected with two links of wave filter and rectifier with two links after filter capacitor E1 is parallel with one another, described capacitor C 1 also is connected with two input ends of frequency converter with two links after filter capacitor E1 is parallel with one another, and described frequency converter is connected with the rotary encoder that is used for the tested motor rotor position information of test by controller; Three output terminals of described frequency converter be connected by three power inputs of measured motor;
The electric machine control system of described load motor comprises capacitor C 1, filter capacitor E1, frequency converter and controller; Described capacitor C 1 is connected with two links of wave filter and rectifier with two links after filter capacitor E1 is parallel with one another, described capacitor C 1 also is connected with two input ends of frequency converter with two links after filter capacitor E1 is parallel with one another, and described frequency converter is connected with the rotary encoder that is used for test load motor rotor position information by controller; Three output terminals of described frequency converter are connected with three power inputs of load motor.
Compared with the prior art, the utility model beneficial effect is embodied in:
Motor for electromechanical testing of the present utility model mainly contains following advantage to dragging platform:
1) load motor that uses of the utility model is permagnetic synchronous motor, compare with the platform that uses other motor to do load motor, advantage with high-level efficiency, high torque ratio of inertias, high-energy-density, and volume is less, can be used for the micro-machine test to dragging platform.
2) permagnetic synchronous motor of the utility model use, simply dragged and generated electricity, but is furnished with the controller with advanced algorithm, make it as load high controllability be arranged, any torque output can be provided, and (the forward negative sense all can, and adjustable size), under controlled situation, work in generating state, make motor more diversified to dragging test.
3) the utility model has adopted common dc bus feed-back type motor to dragging the electrical structure of platform, dc bus parallel connection on being electrically connected, and the load motor electrification feedback is saved electric energy to the electric motor side, raises the efficiency obviously.
Because two cover tape controller permagnetic synchronous motor system's common DC bus and coaxial connections, energy is in both inner feedbacks mutually, the energy of total system consumption is exactly the total losses of various piece, mainly comprise the loss of electric machine, variable frequency drives and the loss of PWM rectifier and a spot of line loss etc., improved capacity usage ratio greatly.This mode can utilize the power supply of miniwatt grade to test more powerful kinematic train, need not the power supply extending capacity reformation.
Motor for electromechanical testing of the present utility model is to dragging platform, the total system Miniaturizable, and motor arbitrarily torque output make motor more diversified to dragging test, save electric energy, obviously raise the efficiency.
Description of drawings
Fig. 1 for the motor for electromechanical testing of the present utility model to drag platform to dragging synoptic diagram.
Fig. 2 for the motor for electromechanical testing of the present utility model to dragging the circuit structure diagram of platform.
Fig. 3 is the structural drawing of the motor for electromechanical testing of the present utility model to the inverter that drags platform.
Fig. 4 is the structural drawing of the motor for electromechanical testing of the present utility model to the inverter that drags platform.
Fig. 5 is the structural drawing of the motor for electromechanical testing of the present utility model to the rectifier that drags platform.
Fig. 6 for the motor for electromechanical testing of the present utility model to dragging the speed closed loop position sensor FOC control chart of platform.
Fig. 7 for the motor for electromechanical testing of the present utility model to dragging the torque closed loop position sensor FOC control chart of platform.
Below pass through embodiment, and the utility model is described in further detail by reference to the accompanying drawings.
Embodiment
Referring to Fig. 2, be used for the motor of electromechanical testing to dragging platform, comprise transformer, rectifier, wave filter, by measured motor, master control system, load motor, shaft coupling and two electric machine control systems; Describedly be connected with one of them electric machine control system by measured motor, described load motor is connected with described another electric machine control system;
The primary winding of described transformer is connected on the AC network; Described rectifier is connected on the secondary coil of transformer; The two ends of described wave filter are connected on two output terminals of described rectifier; Describedly all be connected with wave filter with described rectifier by the electric machine control system of the electric machine control system of measured motor and described load motor; Be connected by shaft coupling between the output shaft of described tested motor output shaft and described load motor; Described tested electric machine control system all is connected with described master control system with the load motor control system; The described rotary encoder that is connected with on the electric machine control system of measured motor for the tested motor rotor position information of test; Be connected with the rotary encoder for test load motor rotor position information on the electric machine control system of described load motor.
As depicted in figs. 1 and 2, for after total system powers on, transformer inputs to rectifier after with the grid alternating current transformation, realizes the conversion of AC-to DC by rectifier, and by exporting to behind the filter filtering by measured motor and these two electric machine control systems of load motor.Two electric capacity by electric machine control system are input to frequency converter after the filtering again, offer two motors after the frequency converter frequency conversion, as the driving power of two motors.Be connected with controller on the frequency converter, controller is for detection of the rotor position information of motor.Two electric machine control systems all are connected with master control system by the CAN bus, by master control system two control system are controlled respectively, and then are realized robotization and the intelligent test of whole electromechanical testing process.The effect that capacitor C 1 before the frequency converter and filter capacitor E1 play energy storage and filtering respectively.Being connected by the communication of CAN line of the host computer of controller and master control system realizes that host computer has corresponding control software, controls two rotating speed of motor and level of torque respectively, monitors the operation of total system simultaneously.The structure of two electric machine control systems is duplicate.
Be actually in the interchange side like this and shared cover pressure regulator, rectifier and a wave filter, also just make the dc bus parallel connection of two motors, realize the effect of common DC bus.
Employed frequency converter is mainly the inverter of being made up of six road insulated gate bipolar transistor IGBTs, and its concrete structure is seen Fig. 3.Controller is by controlling permagnetic synchronous motor to the control of six road IGBT.
The rectifier concrete structure is seen Fig. 4, is the three phase rectifier bridge construction that 6 diodes are formed, and three-phase commutation bridge is connected with three phase network through pressure regulator, can realize four quadrant running, realize unity power factor, the output galvanic current is pressed, and provides the feedback test platform required energy.
The utility model is employed to be two identical permagnetic synchronous motors by measured motor and load motor, certainly difference also can, but power grade can not differ too big.On physical connection, two motors are by shaft coupling rotor coaxial to be connected in the same way, and are coaxial as far as possible, drag like this could guarantee in the process of commentaries on classics whole to drag platform steadily, can not occur rocking, refer in the same way when just being changeed by measured motor, load motor also is in is just changeing state.Physical connection need satisfy above-mentioned coaxial condition in the same way.
From whole New-type electric machine was on the principle of work of dragging platform: tested machine operation dragged load motor at motoring condition, made load motor be in generating state.Like this, current direction on the two motor DC buses is just the opposite, because the dc bus parallel connection of two motors, by the measured motor stream that can the working load motor generates electricity, the current direction of total system is seen Fig. 5, just trailing load motor generates electricity and electric energy is fed back to the motor that drags side and uses, thereby improves overall system efficiency greatly.
Tested control system for permanent-magnet synchronous motor, employing be permanent rotating speed (being speed closed loop) position sensor FOC control algolithm, algorithm block diagram is seen Fig. 6.The load control system for permanent-magnet synchronous motor, employing be permanent torque (being the torque closed loop) position sensor FOC control algolithm, algorithm block diagram is seen Fig. 7.Generally speaking, both all are the control methods of the id=0 of employing, the bid value that is id in the whole control process is 0, difference is, be speed by the controlled quentity controlled variable of measured motor, the controlled quentity controlled variable of load motor is torque (being the q shaft current), and tested electric machine control system is Duoed a speed control loop, i.e. above-mentioned speed ring than load motor.
The described control strategy that is adopted speed ring between the tested electric machine control system of measured motor.Speed ring refers to the speed control loop, and the part of Electric Machine Control in Motor Control Field, if speed control so, all comes control rate by moment of torsion, just has two control loops of speed ring and torsion loop, by Fig. 6 and Fig. 7 as can be seen.
The positional information of motor obtains by rotary encoder, and the acquisition of absolute location information makes Electric Machine Control more accurate.The acquisition of current information can be passed through Hall current sensor, and perhaps by current sampling resistor, what the utility model adopted is the method that current sensor obtains electric current.
Can choose with by the identical as far as possible motor of measured motor as load, whole matching is better, adopt advanced FOC control algolithm, the rotational speed and torque adjustability is stronger, adopt comparatively advanced technological means such as dead area compensation simultaneously, the torque that load motor is provided reaches the homogeneity very approaching with AC induction motor.And, when the slow-speed of revolution, because permanent-magnetic synchronous motor rotor is permanent magnet, make its generating efficiency apparently higher than AC induction motor.Be applied to Motor Measuring System, controllability is stronger, and operational effect is good, and efficient is higher, is better than existing other motors greatly to dragging test platform, adopts motor of the present utility model to have clear superiority to dragging platform and integrally.
From the angle of system's control, as previously mentioned, be that permanent rotating speed is controlled by measured motor, be in the speed closed loop state, be used for controlling the rotating speed of whole test platform; And load motor is permanent torque control, is in torque closed loop state, changes the level of torque of load motor by the q shaft current of control load motor, and simulation is by the load variations of measured motor.
Why can come controlling torque by control q shaft current, reason is as follows: the torque formula of permagnetic synchronous motor is Te=3/2P[ψ
fi
q+ (L
d-L
q) i
di
q], wherein P is the rotor number of pole-pairs, ψ
fBe rotor flux.I on the control algolithm
d=0, so torque is only relevant with the q shaft current, therefore can be by control q shaft current controlling torque, because two motor coaxles connect in the same way, load motor is by giving negative current of q axle for the negative sense torque opposite with rotating speed is provided by measured motor, thereby reaches the effect of fictitious load.
For after total system powers on, the operating voltage 220V that grid alternating current needs by the transformer furnishing; Alternating current is through rectifier rectification and filter filtering, final output DC.Like this, two frequency converters that drag plateform system just are connected with DC bus-bar voltage.
At first, the running load electric machine controller, making it operate in torque is under 0 the state, this moment, load motor did not have any action, was in free state.
Afterwards, move tested electric machine controller, and given by measured motor forward rotating speed of target by the CAN line, for example 3000 rev/mins, by measured motor by stable operation after one section acceleration in the rotating speed of target state, dragging load motor simultaneously moves under this rotating speed, because this moment, load motor controlled quentity controlled variable iq was 0, frequency converter is not worked, and IGBT is not open-minded, so do not have generation current, but produce electromotive force.
After treating that total system is stable, load motor begins to provide the negative sense torque, and load namely is provided, and for example makes iq=-1 ampere.For by measured motor, load this moment strengthens, and just Motor torque strengthens, owing to be that permanent rotating speed is controlled by measured motor, for keeping rotating speed of target, by the adjusting of control algolithm, can strengthen electric current, is in the load testing stage by measured motor like this.For load motor, this moment the state relative complex some, load motor is permanent torque control, the order target is the negative sense torque, if dragging by measured motor not, motor should rotate to negative sense, and in fact, load motor but is to operate in the permanent rotating speed state of forward, and this moment, load motor was in generating state, if the specified loads motor under torque control during normal operation dc bus current be forward, this moment is owing to dragged effect by measured motor so, the actual motion direction is opposite with the target torque direction, so the dc bus of load motor is the negative direction of prescribed direction, the concrete flow direction of total system electric current seen Fig. 5.
Observing the DC current at the wave filter place of Fig. 4 can find by oscillograph, after load motor begins to load, the dc bus current at the wave filter place of Fig. 4 increases and is not obvious, and should be significantly increased owing to adding the required electric current of high pulling torque by measured motor, this explanation, the dc bus of load motor side has corresponding electric current to replenish, load motor has been in generating state, and actual dc bus by oscillograph observation load motor system side, the electric current of finding that truly has flows out, and this also further verifies the correctness of this conclusion.
Generally speaking, the utility model New-type electric machine is to dragging platform when work, and tested motor electromagnetic torque is for just, and rotating speed is in motoring condition for just, and the load motor electromagnetic torque is to bear, and rotating speed is in generating state for just.The total system capacity usage ratio improves greatly, and loss reduces.
Described tested electric machine control system all is connected with described master control system by the CAN bus with the load motor control system.
Described wave filter is filter capacitor.
Described electric machine control system by measured motor comprises capacitor C 1, filter capacitor E1, frequency converter and controller; Described capacitor C 1 is connected with two links of wave filter and rectifier with two links after filter capacitor E1 is parallel with one another, described capacitor C 1 also is connected with two input ends of frequency converter with two links after filter capacitor E1 is parallel with one another, and described frequency converter is connected with the rotary encoder that is used for the tested motor rotor position information of test by controller; Three output terminals of described frequency converter be connected by three power inputs of measured motor; Described frequency converter and also be provided with speed ring between the measured motor;
The electric machine control system of described load motor comprises capacitor C 1, filter capacitor E1, frequency converter and controller; Described capacitor C 1 is connected with two links of wave filter and rectifier with two links after filter capacitor E1 is parallel with one another, described capacitor C 1 also is connected with two input ends of frequency converter with two links after filter capacitor E1 is parallel with one another, and described frequency converter is connected with the rotary encoder that is used for test load motor rotor position information by controller; Three output terminals of described frequency converter are connected with three power inputs of load motor.
The structure of two electric machine control systems is duplicate.Difference between two motors only is that tested electric machine control system Duos a speed ring than load motor.The control synoptic diagram of this speed ring such as Fig. 6 and Fig. 7.
Claims (4)
1. be used for the motor of electromechanical testing to dragging platform, it is characterized in that, comprise transformer, rectifier, wave filter, by measured motor, master control system, load motor, shaft coupling and two electric machine control systems; Describedly be connected with one of them electric machine control system by measured motor, described load motor is connected with another electric machine control system;
The primary winding of described transformer is connected on the AC network; Described rectifier is connected on the secondary coil of transformer; The two ends of described wave filter are connected on two output terminals of described rectifier; Describedly all be connected with wave filter with described rectifier by the electric machine control system of the electric machine control system of measured motor and described load motor; Be connected by shaft coupling between the output shaft of described tested motor output shaft and described load motor; Described tested electric machine control system all is connected with described master control system with the load motor control system; The described rotary encoder that is connected with on the electric machine control system of measured motor for the tested motor rotor position information of test; Be connected with the rotary encoder for test load motor rotor position information on the electric machine control system of described load motor.
2. the motor for electromechanical testing according to claim 1 is characterized in that to dragging platform described tested electric machine control system all is connected with described master control system by the CAN bus with the load motor control system.
3. the motor for electromechanical testing according to claim 1 is characterized in that to dragging platform described wave filter is filter capacitor.
According to claim 1,2 or 3 described motors for electromechanical testing to dragging platform, it is characterized in that described electric machine control system by measured motor comprises capacitor C 1, filter capacitor E1, frequency converter and controller; Described capacitor C 1 is connected with two links of wave filter and rectifier with two links after filter capacitor E1 is parallel with one another, described capacitor C 1 also is connected with two input ends of frequency converter with two links after filter capacitor E1 is parallel with one another, and described frequency converter is connected with the rotary encoder that is used for the tested motor rotor position information of test by controller; Three output terminals of described frequency converter be connected by three power inputs of measured motor;
The electric machine control system of described load motor comprises capacitor C 1, filter capacitor E1, frequency converter and controller; Described capacitor C 1 is connected with two links of wave filter and rectifier with two links after filter capacitor E1 is parallel with one another, described capacitor C 1 also is connected with two input ends of frequency converter with two links after filter capacitor E1 is parallel with one another, and described frequency converter is connected with the rotary encoder that is used for test load motor rotor position information by controller; Three output terminals of described frequency converter are connected with three power inputs of load motor.
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| CN 201320067110 CN203117392U (en) | 2013-02-05 | 2013-02-05 | Motor back-to-back test platform for motor tests |
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| CN 201320067110 CN203117392U (en) | 2013-02-05 | 2013-02-05 | Motor back-to-back test platform for motor tests |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103163460A (en) * | 2013-02-05 | 2013-06-19 | 安徽中家智锐科技有限公司 | Motor twin trawling platform used for motor test |
| CN103630838A (en) * | 2013-12-17 | 2014-03-12 | 南车株洲电机有限公司 | Twin-towing temperature rise method and device for doubly-fed generators |
| CN103969580A (en) * | 2014-05-26 | 2014-08-06 | 东南大学 | Motor testing system based on permanent magnetic coupler |
| CN107102262A (en) * | 2017-04-28 | 2017-08-29 | 华中科技大学 | A kind of linear motor performance test device and its control method |
| CN107490763A (en) * | 2017-08-22 | 2017-12-19 | 中国矿业大学 | The load simulation experimental rig and method of a kind of low-speed big permanent-magnet drive system |
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| CN108333508A (en) * | 2017-12-22 | 2018-07-27 | 苏州恒美电子科技股份有限公司 | Power control system for electromechanical testing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103163460A (en) * | 2013-02-05 | 2013-06-19 | 安徽中家智锐科技有限公司 | Motor twin trawling platform used for motor test |
| CN103630838A (en) * | 2013-12-17 | 2014-03-12 | 南车株洲电机有限公司 | Twin-towing temperature rise method and device for doubly-fed generators |
| CN103630838B (en) * | 2013-12-17 | 2016-07-06 | 南车株洲电机有限公司 | A kind of double-fed generator is to dragging temperature-raising experimental method |
| CN103969580A (en) * | 2014-05-26 | 2014-08-06 | 东南大学 | Motor testing system based on permanent magnetic coupler |
| CN107102262A (en) * | 2017-04-28 | 2017-08-29 | 华中科技大学 | A kind of linear motor performance test device and its control method |
| CN107490763A (en) * | 2017-08-22 | 2017-12-19 | 中国矿业大学 | The load simulation experimental rig and method of a kind of low-speed big permanent-magnet drive system |
| CN107703929A (en) * | 2017-12-06 | 2018-02-16 | 黄河科技学院 | DC brushless motor controller test device |
| CN107703929B (en) * | 2017-12-06 | 2024-03-29 | 黄河科技学院 | DC brushless motor controller testing device |
| CN108333508A (en) * | 2017-12-22 | 2018-07-27 | 苏州恒美电子科技股份有限公司 | Power control system for electromechanical testing |
| CN108845260A (en) * | 2018-08-31 | 2018-11-20 | 重庆顺心仪器设备有限公司 | A kind of motor bracket loading test platform based on frequency conversion control technique |
| CN115912267A (en) * | 2022-11-09 | 2023-04-04 | 成都哈工驱动科技有限公司 | Common direct current bus pair dragging device based on servo drive |
| CN115912267B (en) * | 2022-11-09 | 2023-11-21 | 成都哈工驱动科技有限公司 | Servo-drive-based common direct current bus opposite-dragging device |
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