CN203275601U - Symmetrical motor endurance test system - Google Patents
Symmetrical motor endurance test system Download PDFInfo
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- CN203275601U CN203275601U CN 201320205760 CN201320205760U CN203275601U CN 203275601 U CN203275601 U CN 203275601U CN 201320205760 CN201320205760 CN 201320205760 CN 201320205760 U CN201320205760 U CN 201320205760U CN 203275601 U CN203275601 U CN 203275601U
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Abstract
The application discloses a symmetrical motor endurance test system. The symmetrical motor endurance test system comprises two to-be-tested motors, two environmental chambers, two cooling machine sets, a torque sensor, two motor controllers, a coupling and a rectifying unit. Both the two to-be-tested motors are three-phase AC (alternating current) motors. The two environmental chambers are provided for accommodating the two to-be-tested motors respectively, and temperatures in the chambers are adjustable. The two cooling machine sets are provided for performing heat radiation for windings of the two to-be-tested motors respectively. The torque sensor is disposed on the rotation shaft of either one of the to-be-tested motors. The first motor controller controls direct-axis current and a rotating speed of the rotation shaft of the first to-be-tested motor, and the second motor controller controls direct-axis current and quadrature-axis current of the second to-be-tested motor. The coupling connects the rotation shafts of the two to-be-tested motors, and guarantees the rotation speeds of the two shafts are consistent. The rectifying unit transforms alternating current into constant direct current, and supplies power to the two motor controllers respectively. The symmetrical motor endurance test system has the advantages of simple structure, high test efficiency and good universality.
Description
Technical field
The application relates to the system that a kind of motor to new-energy automobile (hybrid vehicle, pure electric automobile etc.) carries out durability test.
Background technology
Drive motor is the core component of new-energy automobile, usually adopts three phase alternating current motor, is preferably permagnetic synchronous motor.The serviceable life of motor and reliability direct relation life-span and the safety of car load, therefore in the drive motor performance history of new-energy automobile, it is carried out durability test be absolutely necessary.The durability test of motor is based on the operation conditions of motor in actual road conditions, carries out equivalence and strengthens experiment, adds the aging of speed motor.Described equivalence is strengthened experiment and is comprised that motor is at the durability experiment of hot environment operation, the durability experiment that motor moves in the high and low temperature environment alternate cycles etc.Strengthen in described equivalence the overall performance that experiment finishes rear assessment motor, judge whether motor can also normally use.
See also Fig. 1, this is existing a kind of three phase alternating current motor test macro, comprising:
---treat measured motor 10, be three phase alternating current motor.
---environmental chamber 11, in the cabin, temperature is adjustable, treats that measured motor 10 just is placed in environmental chamber 11.
---mounting bracket 12(is optional), be used for fixedly treating measured motor 10.
---cooling unit 13, be used to the winding heat radiation for the treatment of measured motor 10, for example adopt Water Cooling Technology.
---torque sensor 15, be arranged in the rotating shaft for the treatment of measured motor 10, be used for measuring the torque of the rotating shaft for the treatment of measured motor 10 and showing and/or record.
---electric machine controller 19, with dc inverter be after alternating current as the working power for the treatment of measured motor 10, also controlling the output torque of the rotating shaft for the treatment of measured motor 10.
---dynamometer machine 20 is ac dynamometer.Its essence is to have increased dynamometer and tech-generator on the basis of three phase alternating current motor.
---shaft coupling 30, the rotating shaft for the treatment of measured motor 10 is connected with the rotating shaft of dynamometer machine 20, guarantee that the rotating speed of two axles is consistent.
---Dynamometer Control device 29, with dc inverter be after alternating current as the working power of dynamometer machine 20, also controlling the output speed of the rotating shaft of dynamometer machine 20.
---rectification unit 31 is used for alternating current is transformed to direct current.Then one the tunnel is 29 power supplies of Dynamometer Control device, and another road passes to dc-battery simulator 32.
---dc-battery simulator 32, the DC voltage, the current transformation that are used for fixed value are adjustable within the specific limits DC voltage, electric current, and are electric machine controller 19 power supplies.Described motor durability testing system the test different model until measured motor 10 time, these electric pressures for the treatment of measured motor 10 may differ greatly, therefore this dc-battery simulator 32 need to be arranged, in order to adapt to the power demands for the treatment of measured motor 10 of different electric pressures.
The principle of work of motor durability testing system shown in Figure 1 is: 29 pairs of dynamometer machines of Dynamometer Control device 20 adopt rotating speed control mode, drive the constant rotating speed of rotating shaft output of dynamometer machine 20.Because the rotating shaft of dynamometer machine 20 is connected by shaft coupling 30 with the rotating shaft for the treatment of measured motor 10, thereby the rotating shaft for the treatment of measured motor 10 also is being driven and is keeping constant rotating speed.Electric machine controller 19 is treated measured motor 10 and is adopted the torque control models, treats that by adjustment the three-phase current of measured motor 10 changes the output torque for the treatment of measured motor 10, and treat measured motor 10 the three-phase current major decision its winding temperature.When environmental chamber 11 is adjusted into default environment temperature, and the winding temperature of standby motor 10 can be treated the durability test of measured motor 10 when also reaching preset value.
In test process, promote or reduce and treat that the winding temperature of measured motor 10 has following technological means or its combination:
The first is exported to by electric machine controller 19 changes the three-phase current for the treatment of measured motor 10 and is changed the winding temperature for the treatment of measured motor 10.
The second changes by the flow of opening or closing cooling unit 13, adjustment liquid coolant, temperature or its combination in any of adjusting liquid coolant the winding temperature for the treatment of measured motor 10.
Describedly treat that measured motor 10 and dynamometer machine 20 all have two kinds of mode of operations: motor, engine.And one of them works in electric motor mode, and another just works in generator mode; Vice versa.Therefore, the electric energy in whole motor durability testing system can be recycling.The electric energy that replenishes can be obtained by rectification unit 31.Described rectification unit 31 is reproducible, namely comprises inverter circuit.As need output electric energy, also can outwards be exported by this reproducible rectification unit 31.
The said motor durability testing system has following shortcoming:
One adopts a dynamometer machine 20 to drag a mode for the treatment of measured motor 10, once can only test one and treat measured motor 10, and testing efficiency is lower.
Its two, electric machine controller 19 is treated measured motor 10 and is adopted the torque control models, specifically treats that by adjustment the three-phase current of measured motor 10 changes the output torque for the treatment of measured motor 10.Change different model after measured motor 10, often need to change simultaneously electric machine controller 19, cause cost higher.If do not change simultaneously electric machine controller, just need to set up the restriction relation between the rotating speed for the treatment of measured motor 10, torque and the electric current after changing in electric machine controller 19, this coupling cycle is quite very long, usually can reach tens days, tends to have influence on the experiment progress.Thereby the versatility of existing motor durability testing system is relatively poor.
Summary of the invention
The application's technical matters to be solved is to provide that a kind of testing efficiency is higher, the better motor durability testing system of versatility.For this reason, the application also will provide the method for testing of described motor durability testing system.
For solving the problems of the technologies described above, the application's symmetrical expression motor durability testing system comprises:
---treat for two to be three phase alternating current motor by measured motor;
---two environmental chambers, in the cabin, temperature is all adjustable, holds respectively two and treats measured motor;
---two cooling units, being respectively used to is two winding heat radiations for the treatment of measured motor;
---torque sensor is arranged in the rotating shaft for the treatment of arbitrarily measured motor;
---two electric machine controllers, the first motor controller controls first is treated the direct-axis current of measured motor and the rotating speed of rotating shaft, the second motor controller controls second is treated the direct-axis current of measured motor and is handed over shaft current;
---shaft coupling, two rotating shafts for the treatment of measured motor are connected, guarantee that the rotating speed of two axles is consistent;
---rectification unit, alternating current is transformed to constant direct current, then be respectively two electric machine controller power supplies.
Further, treat that measured motor is permagnetic synchronous motor or synchronous magnetic resistance motor for described two.
Further, treat that measured motor is permagnetic synchronous motor or the synchronous magnetic resistance motor of same model for described two.
Further, when two motor internals to be measured integrated position sensor not, be provided for detecting two and treat the rotor-position of measured motor or the position transducer of rotating speed in the rotating shaft of any motor to be measured; Perhaps, two motor internals to be measured are integrated with the position transducer of detection rotor position separately or rotating speed.
Further, described two cooling units all adopt water-cooling pattern, and coolant temperature and flow all adjustable.
In the application's symmetrical expression motor durability testing system, be no longer that a dynamometer machine drags a mode of operation for the treatment of measured motor, but treat the mode of operation of measured motor to dragging by two, this has not only simplified system architecture, and makes testing efficiency double.Wherein treat that measured motor is subject to rotating speed and the direct-axis current control of electric machine controller for one, another treats that measured motor is subject to the direct-axis current of electric machine controller and hands over shaft current to control.But this control method makes two equal fine adjustments of three-phase current for the treatment of measured motor; Have better versatility than existing rotating speed and torque control simultaneously, can test easily the measured motor for the treatment of of different model.
Description of drawings
Fig. 1 is the structural representation of existing motor durability testing system;
Fig. 2 is the structural representation of the application's symmetrical expression motor durability testing system.
Description of reference numerals in figure:
10 for treating measured motor; 10a first treats measured motor; 10b second treats measured motor; 11 is environmental chamber; 11a is the first environment cabin; 11b is the second environment cabin; 12 is mounting bracket; 12a is the first mounting bracket; 12b is the second mounting bracket; 13 is cooling unit; 13a is the first cooling unit; 13b is the second cooling unit; 14 is speed probe; 15 is torque sensor; 19 is electric machine controller; 19a is the first electric machine controller; 19b is the second electric machine controller; 20 is dynamometer machine; 30 is shaft coupling; 31 is rectification unit; 32 is the dc-battery simulator.
Embodiment
See also Fig. 2, this is the application's symmetrical expression motor durability testing system, comprising:
---first treats that measured motor 10a and second treats measured motor 10b, is three phase alternating current motor, is preferably permagnetic synchronous motor or synchronous magnetic resistance motor.If two are treated that measured motor 10a, 10b are same model, are preferred forms.
---first environment cabin 11a and second environment cabin 11b, in the cabin, temperature is all adjustable.First treats that measured motor 10a is placed in first environment cabin 11a, and its rotating shaft can be stretched out from first environment cabin 11a.Second treats that measured motor 10b is placed in second environment cabin 11b, and its rotating shaft can be stretched out from second environment cabin 11b.
---the first mounting bracket 12a and the second mounting bracket 12b(are all optional), be respectively used to fix first and treat that measured motor 10a and second treats measured motor 10b.
---the first cooling unit 13a and the second cooling unit 13b, being respectively used to is the winding heat radiation that the first winding, second for the treatment of measured motor 10a is treated measured motor 10b, for example adopts Water Cooling Technology.The temperature of liquid coolant and flow velocity all can be regulated.
---position transducer 14(is optional), be arranged on first and treat in the rotating shaft of measured motor 10a or second treat in the rotating shaft of measured motor 10b.Described position transducer 14 is for detection of the rotating shaft position for the treatment of measured motor 10a, 10b, and this rotating shaft position also can be converted to tach signal, and offers two electric machine controller 19a, 19b.The first electric machine controller 19a can carry out rotating speed control and Parker inverse transformation according to rotating shaft position or tach signal.The second electric machine controller 19b can carry out the Parker inverse transformation according to tach signal.Usually treating that measured motor 10a, 10b inside is integrated with position transducer, that just need not to arrange independent position transducer 14, and detects rotating shaft position or rotating speed by position transducer separately.If treat not integrated position sensor of measured motor 10a, 10b inside, need independent setting position sensor 14.
---torque sensor 15, be arranged on first and treat in the rotating shaft of measured motor 10a or second treat in the rotating shaft of measured motor 10b, be used for measuring the torques of two rotating shafts for the treatment of measured motor 10a, 10b and show and/or records.
---the first electric machine controller 19a and the second electric machine controller 19b, the first electric machine controller 19a are used for controlling first and treat the direct-axis current of measured motor 10a and the rotating speed of rotating shaft.The second electric machine controller 19b is used for controlling second and treats the direct-axis current of measured motor 10b and hand over shaft current.When three phase alternating current motor is analyzed, frequent a, b, c three-phase current with stator projects to the d-axis (d axle) along with rotor, hand over axle (q axle) and zero axle (0 axle) perpendicular to the dq plane to get on, namely be transformed into the dq0 coordinate system from the abc coordinate system, this is called Park Transformation (Park's Transformation).Otherwise be called the Parker inverse transformation.
---shaft coupling 30, two rotating shafts for the treatment of measured motor 10a, 10b are connected, guarantee that the rotating speed of two axles is consistent.
---rectification unit 31, be used for alternating current is transformed to constant direct current, then be respectively two electric machine controller 19a, 19b power supplies.All have inverter circuit in two electric machine controller 19a, 19b, be used for changing direct current into alternating current, then respectively as two working powers for the treatment of measured motor 10a, 10b.
The principle of work of symmetrical expression motor durability testing system shown in Figure 2 is:
At first, the first electric machine controller 19a is controlling the first rotating speed for the treatment of measured motor 10a, drives the first constant rotating speed of rotating shaft output for the treatment of measured motor 10a.Because two rotating shafts for the treatment of measured motor 10a, 10b are connected by shaft coupling 30, thereby the second rotating shaft for the treatment of measured motor 10b also is being driven and is keeping constant rotating speed.
Then, the second electric machine controller 19b is controlling second and is treating the direct-axis current of measured motor 10b and hand over shaft current (can be converted to three-phase current by the Parker inverse transformation), and change thus the second output torque for the treatment of measured motor 10b, and direct-axis current and friendship shaft current major decision the second winding temperature for the treatment of measured motor 10b.Any model treat all to be integrated with in measured motor 10a, 10b temperature sensor for detection of winding temperature.When second environment cabin 11b is adjusted into default second environment temperature, and the winding temperature of the second standby motor 10b is when also reaching the second preset value, can carry out the second durability test for the treatment of measured motor 10b.
Again, when second treats measured motor 10b output torque, because two rotating shafts for the treatment of measured motor 10a, 10b are connected by shaft coupling 30, thereby the first rotating shaft for the treatment of measured motor 10a also is being driven and produces and second treat that the level of torque that measured motor 10b exports is identical, the torque of opposite direction.Because the first electric machine controller 19a is also controlling the first direct-axis current for the treatment of measured motor 10a, first treat that the friendship shaft current of measured motor 10a is just by the common constraint of described opposite moment and direct-axis current institute so.Direct-axis current and hand over shaft current to be converted to three-phase current by the Parker inverse transformation, thus the first winding temperature for the treatment of measured motor 10a controlled.When first environment cabin 11a is adjusted into default first environment temperature, and the winding temperature of the first standby motor 10a is when also reaching the first preset value, can carry out the first durability test for the treatment of measured motor 10a.
Wherein, the adjustment of two environmental chamber 11a, 11b, opening time of two cooling unit 13a, 13b and can be placed on arbitrary steps to the temperature of liquid coolant and the adjusting of flow.Generally, first regulate the temperature of two environmental chamber 11a, 11b, and it is too high to prevent two winding temperatures for the treatment of measured motor 10a, 10b to open two cooling unit 13a, 13b, is comparatively common.
When measured motor 10a, 10b are same model, usually make two to treat that measured motor 10a, 10b are operated under identical or close operating mode when two, namely environment temperature and winding temperature all are consistent.At this moment, two three-phase currents for the treatment of measured motor 10a, 10b also are consistent substantially, and two cooling unit 13a, 13b also keep identical coolant temperature and flow usually, and minor deviations may be arranged.But owing to working in respectively generator mode and electric motor mode, treat the direct-axis current of measured motor 10a, 10b and hand over shaft current that certain deviation must be arranged for two.
Treat that measured motor 10a, 10b all have two kinds of mode of operations for described two: motor, engine, they can conversion arbitrarily between these two kinds of mode of operations.But wherein a machine operation to be measured consumes electric energy in electric motor mode, and another treats that measured motor just works in generator mode and produces electric energy; Vice versa.Therefore, the electric energy in whole motor durability testing system can be recycling.Energy flow is to for treating the corresponding electric machine controller of measured motor from the DC terminal of rectification unit to the motor operation pattern, again to the measured motor for the treatment of of motor operation pattern, arrive again shaft coupling, again to the measured motor for the treatment of of generator mode of operation, again to the generator mode of operation treat the corresponding electric machine controller of measured motor, return the DC terminal of rectification unit.The system loss that produces in this process comprises that copper loss, iron loss, mechanical loss etc. all will consume electric energy, and the electric energy of consumption is obtained from exchanging end by rectification unit 31.Described rectification unit 31 is reproducible, namely comprises inverter circuit.Under special operation condition, for example motor is cut off the electricity supply suddenly, and generator has produced high pulling torque moment braking, and energy feedback in short-term can occur whole system.The energy of feedback also can be by this reproducible rectification unit 31 to exchanging end output.
Treat that measured motor 10a, 10b all have two kinds of control models for described two: rotating speed and direct-axis current control model, friendship shaft current and direct-axis current control model, they can conversion arbitrarily between these two kinds of control models.But, wherein treat that measured motor is in rotating speed and direct-axis current control model for one, another treats that measured motor just works in friendship shaft current and direct-axis current control model; Vice versa.
Compare with existing motor durability testing system, the application's symmetrical expression motor durability testing system has following features:
One adopts two modes for the treatment of that measured motor 10a, 10b test mutually, has both omitted dynamometer machine 20, has reduced the equipment investment cost; Can treat that to two measured motor carries out durability test simultaneously again, testing efficiency is double.
Its two, the first electric machine controller 19a treats measured motor 10a output speed control signal and direct axis current signal to first, and the second electric machine controller 19b treats measured motor 10b output direct axis current signal and hands over axis current signal second.These signals and the relation between the winding temperature of measured motor for the treatment of can be obtained by simulation software, also can estimate by known motor attribute, usually only need the time of several minutes to get final product.Can replace arbitrarily under the prerequisite of not changing two electric machine controller 19a, 19b and treat measured motor, thereby greatly strengthen the versatility of the application's symmetrical expression motor durability testing system.
Treat that measured motor 10a, 10b may be different models, may be also same model for two.Even if be same model, but also can there be nuance physically, says nothing of both and work in respectively generator and electric motor mode.The application treats that to second measured motor 10b adopts friendship, direct-axis current control model completely, treat that to first measured motor 10a has also opened direct-axis current control, thereby can by adjusting the first direct-axis current for the treatment of measured motor 10a, finally make two to treat that measured motor 10a, 10b reach respectively the winding temperature of setting separately.
Its three, two electric machine controller 19a, 19b preferably adopt the model of voltage levels, thereby adapt to the measured motor for the treatment of of various electric pressures, and this has also just saved the cost of dc-battery simulator (DC/DC unit) 32.
These are only the application's preferred embodiment, and be not used in restriction the application.For a person skilled in the art, the application can have various modifications and variations.All within the application's spirit and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in the application's protection domain.
Claims (5)
1. a symmetrical expression motor durability testing system, is characterized in that, comprising:
---treat for two to be three phase alternating current motor by measured motor;
---two environmental chambers, in the cabin, temperature is all adjustable, holds respectively two and treats measured motor;
---two cooling units are respectively two winding heat radiations for the treatment of measured motor;
---torque sensor is arranged in the rotating shaft for the treatment of arbitrarily measured motor;
---two electric machine controllers, the first motor controller controls first is treated the direct-axis current of measured motor and the rotating speed of rotating shaft, the second motor controller controls second is treated the direct-axis current of measured motor and is handed over shaft current;
---shaft coupling, two rotating shafts for the treatment of measured motor are connected, guarantee that the rotating speed of two axles is consistent;
---rectification unit, alternating current is transformed to constant direct current, then be respectively two electric machine controller power supplies.
2. symmetrical expression motor durability testing system according to claim 1, is characterized in that, treats that measured motor is permagnetic synchronous motor or synchronous magnetic resistance motor for described two.
3. symmetrical expression motor durability testing system according to claim 2, is characterized in that, treats that measured motor is permagnetic synchronous motor or the synchronous magnetic resistance motor of same model for described two.
4. symmetrical expression motor durability testing system according to claim 1, it is characterized in that, when two motor internals to be measured integrated position sensor not, be provided for detecting two and treat the rotor-position of measured motor or the position transducer of rotating speed in the rotating shaft of any motor to be measured; Perhaps, two motor internals to be measured are integrated with the position transducer of detection rotor position separately or rotating speed.
5. symmetrical expression motor durability testing system according to claim 1, is characterized in that, described two cooling units all adopt water-cooling pattern, and coolant temperature and flow all adjustable.
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| CN 201320205760 CN203275601U (en) | 2013-04-22 | 2013-04-22 | Symmetrical motor endurance test system |
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| CN 201320205760 CN203275601U (en) | 2013-04-22 | 2013-04-22 | Symmetrical motor endurance test system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235261A (en) * | 2013-04-22 | 2013-08-07 | 联合汽车电子有限公司 | System and method thereof for testing endurance of symmetrical motor |
| CN105277861A (en) * | 2015-11-19 | 2016-01-27 | 南车株洲电机有限公司 | Method for testing motor bearing dielectric strength |
| WO2021057338A1 (en) * | 2019-09-25 | 2021-04-01 | 比亚迪股份有限公司 | Energy conversion apparatus and vehicle |
-
2013
- 2013-04-22 CN CN 201320205760 patent/CN203275601U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235261A (en) * | 2013-04-22 | 2013-08-07 | 联合汽车电子有限公司 | System and method thereof for testing endurance of symmetrical motor |
| CN105277861A (en) * | 2015-11-19 | 2016-01-27 | 南车株洲电机有限公司 | Method for testing motor bearing dielectric strength |
| WO2021057338A1 (en) * | 2019-09-25 | 2021-04-01 | 比亚迪股份有限公司 | Energy conversion apparatus and vehicle |
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