CN102902260B - Motor loading device - Google Patents
Motor loading device Download PDFInfo
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- CN102902260B CN102902260B CN201110209869.3A CN201110209869A CN102902260B CN 102902260 B CN102902260 B CN 102902260B CN 201110209869 A CN201110209869 A CN 201110209869A CN 102902260 B CN102902260 B CN 102902260B
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Abstract
The invention provides a kind of for the motor loading device in electric machine controller performance test, wherein this motor loading device comprises at least three motors, the output shaft of described at least three motors is mechanically connected in series, and any one motor in described at least three motors is as the first motor, this first motor is connected with the electric machine controller of performance to be measured, as the control objectives of the electric machine controller of described performance to be measured, at least one motor in all the other motors in these at least three motors is as loading motor, this loading motor provides load for described first motor.
Description
Technical field
The present invention relates to a kind of motor loading device, more specifically, relate to for the motor loading device in electric machine controller performance test.
Background technology
In electric utility, often need to carry out performance test to electric machine controller.In testing, electric machine controller is connected with motor loading device, this motor loading device provides the motor be under different loads for electric machine controller, thus makes it possible to the control effects of simulated machine controller to motor under different loads, and then realizes the object of electric machine controller performance test.
Traditionally, as shown in Figure 1, motor loading device 1 uses two motors to dragging structure, one of them motor 11 is connected with the electric machine controller of the performance to be measured of outside, (conveniently state as its control objectives, this and after, the motor be connected with the electric machine controller of performance to be measured is sometimes referred to as " treating measured motor "); And another motor 13 is loading motor, linked together by shaft coupling 12 and motor 11, thus provide load for motor 11.
Electric machine controller and motor are that power matches, and therefore, when testing the electric machine controller of different capacity, what often need to change the watt level matched with it treats measured motor.Such as, what the electric machine controller of a 2.2kW needed to connect 2.2kW or 3kW treats measured motor, if need the electric machine controller testing 4kW, then must treat former the motor that measured motor is replaced by 4kW or 5.5kW.Especially, sometimes even also need the loading motor changing different capacity so that for treating the load that measured motor provides suitable, thus be equivalent to need to replace whole charger.Due to the mechanical connection relative complex between motor, and need to ensure high-precision coaxial degree, therefore, higher technical requirement is proposed to installation personnel, otherwise the series of problems such as the motor of difference connects may cause high vibration, motor is beated, shaft coupling damages, motor damage, velocity feedback distortion.Therefore, time-consuming, the effort of above-mentioned replacing/installment work and exist and damage the risk of parts.On the other hand, change/install operation also by the wearing and tearing of inevitably acceleration mechanical connecting portion such as shaft coupling and aging, and then reduce the precision of whole device, and reduce the serviceable life of whole device.
Therefore, need a kind of new motor loading device in prior art badly, it can reduce even eliminates the problems referred to above.
Summary of the invention
The object of this invention is to provide a kind of motor loading device that can solve the problem at least in part.
In order to solve the problems of the technologies described above, at this, the design of the multiple motor be connected in series of employing as motor loading device is proposed innovatively.Specifically, utilize at least three motors, such as three, four, five or more motor are cascaded to form motor loading device.These motors be cascaded can have different watt levels, such as, and the power from left to right increased gradually.Can select wherein any one motor for treating measured motor, be connected with the electric machine controller of performance to be measured, all the other one, two, the motor of three or more is as loading motor, common for treating that measured motor provides load in electric machine controller performance test of these loading motors, in this case, if treat that measured motor and loading motor quantity sum are less than total number of motors, motor then in motor except treating measured motor and loading motor is as vacant motor, always blank state is in electric machine controller test, any moment or rotating speed is not provided to export, namely not for treating that measured motor provides any load, now, in fact this vacant motor can regard as shaft coupling.
Foregoing invention according to the present invention is conceived, and motor loading device such as can be connected in series by four motors of 1.1kW, 2.2kW, 3kW, 5.5kW and form.The motor loading device of such structure at least can bring one or more of following Advantageous Effects:
1, due to any one motor in multiple motor can be selected, the motor of such as 5.5kW, as treating measured motor, therefore in fact motor loading device multiple power grade can be provided treat measured motor, thus solve the deficiency treating measured motor that traditional single charger can only provide single power bracket.
2, due to one or more motors in multiple motor can be selected as loading motor, therefore by suitably selecting the combination of the watt level of loading motor and the loading motor of different capacity size, the load that measured motor provides suitable can be treated neatly for what select, that is, can suitable group of motors be selected incompatible for treating that measured motor provides loading in motor existing from motor loading device, and do not need extra new motor, thus be conducive to reducing whole testing cost.Such as, for the example of the charger of above-mentioned four motors, if select the motor of 3kW for treating measured motor, then two motors can selecting 1.1kW, 2.2kW are loading motor, and correspondingly, in this case, the motor of 5.5kW is vacant motor.If select the motor of 5.5kW for treating measured motor, then three motors can selecting 1.1kW, 2.2kW and 3kW are loading motor.
3, further, above-mentionedly treat that the selection of measured motor and/or loading motor can be carried out automatically by selector switch/controller, and electrical connection need not be changed in artificially, therefore, reduce human cost and change the spillage of material being electrically connected and may causing.
4, motor loading device of the present invention is being built after configuration completes for the first time, do not need the power along with electric machine controller to be measured different and change and different treat measured motor and corresponding loading motor, namely, whole motor loading device only needs to build for the first time, there is no follow-up dismounting, to install and the operation such as replacing again, correspondingly, avoid a series of negative consequences that dismounting, again installation and replacement operation produce, such as, again connect the mechanical part of possibility damage device, such as shaft coupling, thus cause precision reduce or bring possible vibration; Attended operation has certain technical requirement to technician again; Attended operation is wasted time and energy again; The motor more renewed and corresponding accessory, inevitably cause testing cost rising etc.
5, as can be seen from above-mentioned analysis, motor loading device of the present invention has the wider power scope of application, for the electric machine controller to be measured of different capacity, do not need frequently to change motor, therefore fundamentally thoroughly solve the problem of the aspects such as time cost, human cost and the material cost that in prior art, frequent replacing motor brings.
According to above-mentioned design, in one embodiment of the invention, there is provided a kind of for the motor loading device in electric machine controller performance test, wherein, this motor loading device comprises at least three motors, the output shaft of described at least three motors is mechanically connected in series, and any one motor in described at least three motors is as the first motor, this first motor is connected with the electric machine controller of performance to be measured, as the control objectives of the electric machine controller of described performance to be measured, at least one motor in all the other motors in these at least three motors is as loading motor, this loading motor provides load for described first motor.At this, " the first motor " is " treating measured motor " of being connected with the electric machine controller of performance to be measured that other many places are in the present invention mentioned, the two is only that appellation is different so that statement, without any substantial differences.In this embodiment, it is possible that the motor in described at least three motors except described first motor is all loading motor.Or, a part of motor in motor in described at least three motors except described first motor is loading motor and all the other motors are vacant motor, described vacant motor is always in blank state in electric machine controller performance test, do not produce any output, thus not for described first motor provides any load.
In the above embodiment of the present invention, described motor loading device can also comprise pedestal, and described at least three motors are settled on the base.
In the above embodiment of the present invention, described motor loading device can also comprise loading motor controller, this loading motor controller is connected with described at least three motors, as loading motor, and controls the output of this loading motor for selecting wherein at least one motor.In the present invention, also can be unworthy of being set up stating loading motor controller, and directly select the several motors fixed to be loading motor.
In the above embodiment of the present invention, described motor loading device can also comprise the first selection of Motor device, and this first selection of Motor device is connected with described at least three motors, for selecting one of them motor as the first motor.In the present invention, also can be unworthy of being set up and state the first selection of Motor device, and directly select the motor fixed as loading motor.
In the above embodiment of the present invention, preferably, described motor loading device can also comprise electric feedback system, and this electric feedback system is connected with this motor loading device, for the electric feedback that will produce in this motor loading device to electrical network.
In the above embodiment of the present invention, preferably, at least one motor be positioned in described at least three motors in the middle of the motor of both sides can be provided with extra external fan, for providing powerful radiating effect.
In the above embodiment of the present invention, preferably, described at least three motors are three or four motors.Too much motor series connection may cause control system complexity and motor coaxle degree to be difficult to ensure.Too much motor series connection also may cause rotating shaft quality to increase, and inertia becomes large, causes low-power machine difficulty in starting.
In the above embodiment of the present invention, preferably, the rated power sum of all loading motors is greater than the rated power of described first motor.
Will be appreciated that, foregoing description is only used to exemplary object, instead of will limit the scope of the invention.
Accompanying drawing explanation
Above-mentioned and the further feature of exemplary embodiment of the present invention and advantage will become more obvious from detailed description with the accompanying drawing below, and describe and accompanying drawing only for exemplary purpose instead of limit the scope of the invention by any way, wherein:
Fig. 1 is the schematic diagram of the motor loading device according to prior art.
Fig. 2 is the schematic diagram of the mechanical part of motor loading device according to an embodiment of the invention.
Fig. 3 is the schematic diagram of the electric part of motor loading device according to an embodiment of the invention.
Fig. 4 is the schematic diagram of electric feedback system according to an embodiment of the invention.
Embodiment
Below with reference to accompanying drawings various embodiments of the present invention are described.
Fig. 2 is the schematic diagram of the mechanical part of motor loading device according to an embodiment of the invention.As shown in the figure, motor loading device 2 comprises three motors 21,22,23 according to an embodiment of the invention, and these three motors are connected in series by shaft coupling 24.It should be noted that motor loading device of the present invention can comprise four, five or more motor, be not limited to three in this as example.But connect and the angle of complicacy of electrical control from electromechanics, preferably, motor loading device of the present invention comprises three or four motors, to avoid causing electric machine control system relative complex and/or being difficult to guarantee motor connection coaxiality.
Three motors 21,22,23 can be placed in a pedestal (not shown).This pedestal should have enough weight and stability, to absorb the mechanical vibration of generation.A motor in three motors, such as, in the figure motor 23 of the rightmost side, can as the first motor, and this first motor is connected with the electric machine controller of performance to be measured, as the control objectives of the electric machine controller of described its performance to be measured.Notice, in the de-scription, the motor be connected with the electric machine controller of performance to be measured is called for short sometimes " treating measured motor ", and sometimes also referred to as " the first motor ", the two can be used alternatingly.That is, in controller test, the electric machine controller of performance to be measured will control the output of motor 23.One or two in motor 21 and 22 as loading motor, for motor 23 provides load, can resist the output of motor 23 in the opposite direction.
Especially, can select such as that motor 22 is as loading motor, and motor 21 is as vacant motor, is in lasting blank state.In testing, only motor 22 is for treating that measured motor 23 provides load, and motor 21 does not provide any output, and correspondingly, motor 21 without any electrical connection, or can have electrical connection, but electric power is input as zero.Certainly, motor 21 also can be selected as loading motor, and motor 22 is as vacant motor, now, motor 22 is equivalent to a shaft coupling, can play the effect of carry-over moment in motor 21 and 23.In practice, more preferably near treating that the motor 22 of measured motor 23 is as loading motor, to shorten moment bang path as much as possible.
Or, both motors 21,22 can be selected common as loading motor, now, there is not vacant motor.In testing, when needs export certain moment provide load to treat measured motor time, preferably, electric machine controller can control two loading motors simultaneously and provide corresponding load in proportion.Such as, when needing to treat measured motor and providing the moment of corresponding 0.5kW power, for two loading motors of rated power 1.1kW and 2.2kW, they can distinguish the power exporting (1.1kW/3.3kW) × 0.5kW=0.167kW and (2.2kW/3.3kW) × 0.5kW=0.333kW in proportion.In other words, now, two loading motors of 1.1kW and 2.2kW simply can regard as the motor of a 3.3kW, and the coupling of power stage can by controller and motor from Row sum-equal matrix.
It should be noted that, in order to the requirement of the full load test treating measured motor can be met, no matter select which motor as treating measured motor, or no matter select the wherein a part of motor except treating measured motor as loading motor or select all motors except treating measured motor as loading motor, preferably, the rated power sum of all loading motors should be greater than the rated power treating measured motor.In addition, preferably, minimum motor inertia should be not less than 10% of the inertia (inertia of motor+shaft coupling+other annex) of whole motor loading device.
Treat that the selection of measured motor and loading motor can be determined/fix, such as, in electrical connection, motor 23 in Fig. 2 can be connected for treating measured motor, motor 21 is connected with 22 for loading motor, thus avoids carrying out any selection thus the electrical system simplifying whole motor loading device.When needing to change the selection until measured motor and/or loading motor, more manually carry out corresponding line.On the other hand, in order to expand dirigibility and the power scope of application of motor loading device, above-mentioned selection can be carried out by controller/selector switch.Fig. 3 is the schematic diagram of the electric part of motor loading device according to an embodiment of the invention, and this schematic diagram also show for selecting the loading motor selecting arrangement of loading motor and the selection of Motor device to be measured for selecting to treat measured motor.But, it should be noted that, depend on actual demand, motor loading device of the present invention can not have loading motor selecting arrangement and both selection of Motor devices to be measured, only have motor loading device selecting arrangement and there is no selection of Motor device to be measured, only need measured motor selecting arrangement and do not have loading motor selecting arrangement, there is loading motor selecting arrangement and both selection of Motor devices to be measured simultaneously.
In figure 3, motor loading device comprises loading motor controller 201, and this loading motor controller 201 is electrically connected by five K switch L with three motors 21,22 and 23, and loading motor controller 201 and be wherein connected with two K switch L between each motor.This loading motor controller can play the function of loading motor selector switch, by controlling the folding of K switch L of suitable number, appropriate location, select wherein any one motor or two motors as loading motor.This loading motor controller can also the corresponding moment of controlled loading motor or rotating speed export.The ATV71 controller that can commercially directly buy that loading motor controller 201 can such as select Schneider company to produce.It should be noted that, the connected mode not specific restriction of loading motor controller and K switch L, it sets flexibly according to the specific model of loading motor controller, as long as can realize the selection as loading motor of any one motor above-mentioned or two motors.
In figure 3, motor loading device comprises selection of Motor device 202 to be measured, and this selection of Motor device 202 to be measured is electrically connected by three K switch T with three motors 21,22 and 23, and is connected with a K switch T between selection of Motor device 202 to be measured and each motor.This selection of Motor device to be measured can play the function of selection of Motor device to be measured, closes and rest switch disconnection, and select one of them motor for treating measured motor by controlling one of them K switch T.The selection of Motor device to be measured that can realize above-mentioned functions is known, can directly buy from the market.The electric machine controller 203 of performance to be measured is connected with 23 with motor 21,22 by selection of Motor device 202 to be measured.The electric machine controller 203 of performance to be measured is the tested object of testing experiment, and can to control to be under different loads chosen treats measured motor for it.
In testing, because motor to be measured rotates with loading motor, therefore, loading motor, by producing the effect of generator, produces electric power in systems in which.If this electric power is not suitably derived, load controller emergency protection (being generally overvoltage fault) may be caused.For this reason, preferably, external device (ED) such as braking resistor etc. can be connected and feedback energy is converted to heat exhaustion falls, but for heavy-duty motor load device, feedback energy is high, if adopt heat rejection mode to need complicated cooling system.Therefore, preferably, electric feedback system can be comprised according to charger of the present invention, solve heat dissipation problem and add energy conservation simultaneously.Fig. 4 is the schematic diagram of electric feedback system according to an embodiment of the invention.Electric feedback system 204 one end is connected with loading motor controller 201, and the other end is connected to electrical network, for the electric feedback that will produce in motor loading device to electrical network.Electric feedback system 204 can be such as Schneider company produce can be commercially available product A FE.
In testing, on the one hand, the operation of motor itself will produce a large amount of heats, on the other hand, close to each other and heat that is that cause motor to produce not easily dissipates in time due to multiple motor series connection, therefore, should consider Thermal protection.Preferably, each motor can select the class of insulation be H brute force refrigeration motor.Further, the heat produced due to the motor be positioned in the motor that is connected in series in the middle of the motor of both sides not easily distributes, and the heat that both sides motor produces also will be delivered to middle motor, therefore, preferably, in the present invention, can at least one motor be positioned in the middle of the motor of both sides be provided with extra external fan, such as go up, left and right 3 external fans, for providing extra radiating effect.Power, the number and arrangement etc. of external fan suitably can be selected according to concrete operating mode.
Although with reference on the basis of each embodiment, the present invention has been described in the description and has been illustrated in the accompanying drawings, but it will be appreciated by those skilled in the art that, above-described embodiment is only preferred embodiment, some technical characteristic in embodiment may not be required for the specific technical matters of solution, thus not or can omit these technical characteristics and the solution of non-influence technique problem or the formation of technical scheme; And the feature of an embodiment, key element and/or function suitably mutually can combine, combine or coordinate with the feature of other one or more embodiment, key element and/or function, unless this combination, combination or coordinate obviously can not be implemented.
Claims (10)
1., for the motor loading device in electric machine controller performance test, it is characterized in that,
This motor loading device comprises at least three motors,
The output shaft of described at least three motors is mechanically connected in series, and
Any one motor in described at least three motors is as the first motor, this first motor is connected with the electric machine controller of performance to be measured, as the control objectives of the electric machine controller of described performance to be measured, at least one motor in all the other motors in these at least three motors is as loading motor, and this loading motor provides load for described first motor.
2. motor loading device as claimed in claim 1, it is characterized in that, the motor in described at least three motors except described first motor is all loading motor.
3. motor loading device as claimed in claim 1, it is characterized in that, a part of motor in motor in described at least three motors except described first motor is loading motor and all the other motors are vacant motor, described vacant motor is always in blank state in electric machine controller performance test, do not produce any output, thus not for described first motor provides any load.
4. motor loading device as claimed in claim 1, it is characterized in that, described motor loading device also comprises pedestal, and described at least three motors are settled on the base.
5. motor loading device as claimed in claim 1, it is characterized in that, described motor loading device also comprises loading motor controller, this loading motor controller is connected with described at least three motors, as loading motor, and the output of this loading motor is controlled for selecting wherein at least one motor.
6. motor loading device as claimed in claim 1, it is characterized in that, described motor loading device also comprises the first selection of Motor device, and this first selection of Motor device is connected with described at least three motors, for selecting one of them motor as the first motor.
7. motor loading device as claimed in claim 1, it is characterized in that, described motor loading device also comprises electric feedback system, and this electric feedback system is connected with this motor loading device, for the electric feedback that will produce in this motor loading device to electrical network.
8. the motor loading device as described in one of claim 1-7, is characterized in that, at least one motor be positioned in described at least three motors in the middle of the motor of both sides is provided with extra external fan, for providing powerful radiating effect.
9. the motor loading device as described in one of claim 1-7, is characterized in that, described at least three motors are three or four motors.
10. the motor loading device as described in one of claim 1-7, is characterized in that, the rated power sum of all loading motors is greater than the rated power of described first motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110209869.3A CN102902260B (en) | 2011-07-26 | 2011-07-26 | Motor loading device |
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| CN201110209869.3A CN102902260B (en) | 2011-07-26 | 2011-07-26 | Motor loading device |
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| CN102902260A CN102902260A (en) | 2013-01-30 |
| CN102902260B true CN102902260B (en) | 2015-09-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103441650A (en) * | 2013-09-02 | 2013-12-11 | 昆山建金工业设计有限公司 | High-speed multilayer type motor |
| CN107656202B (en) * | 2017-07-24 | 2020-02-07 | 杭州威衡科技有限公司 | Distributed new energy automobile motor performance testing device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08248104A (en) * | 1995-03-10 | 1996-09-27 | Toyota Motor Corp | Motor performance test device |
| JP2004309256A (en) * | 2003-04-04 | 2004-11-04 | Tamagawa Seiki Co Ltd | Load tester for motor |
| CN101162183A (en) * | 2007-10-15 | 2008-04-16 | 吉林大学 | Novel energy-saving control system for reversible dc transmission test bench |
| CN201145713Y (en) * | 2007-12-30 | 2008-11-05 | 海信（山东）空调有限公司 | Experimental device for frequency conversion controller |
| CN101477174B (en) * | 2008-10-31 | 2011-01-12 | 北京理工大学 | Complex load behavior simulation and performance test apparatus for servo system |
| CN101793605B (en) * | 2010-03-31 | 2012-01-25 | 哈尔滨工业大学 | Dynamic loading methods based on servo motor |
| CN202257262U (en) * | 2011-07-26 | 2012-05-30 | 施耐德东芝换流器欧洲公司 | Motor loading device |
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