CN114114013B - Feedback small motor test platform - Google Patents
Feedback small motor test platform Download PDFInfo
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- CN114114013B CN114114013B CN202111475068.1A CN202111475068A CN114114013B CN 114114013 B CN114114013 B CN 114114013B CN 202111475068 A CN202111475068 A CN 202111475068A CN 114114013 B CN114114013 B CN 114114013B
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- 230000008713 feedback mechanism Effects 0.000 claims abstract description 7
- 238000004891 communication Methods 0.000 claims description 19
- 230000008054 signal transmission Effects 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000005284 excitation Effects 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a feedback small motor test platform, which comprises a tested motor, a plurality of accompanying test units, a feedback device and a control system, wherein the feedback device is connected with the motor; the tested motor is respectively connected with a plurality of accompanying test units; the test accompanying units are respectively connected with the feedback mechanism in a controlled manner; the control system is respectively connected with a plurality of groups of tested motor groups and feedback devices in a driving way and performs data transmission; the control system is used for selecting and starting the accompanying test unit, and transmitting parameters of the corresponding accompanying test unit to the feedback device, and the feedback device is used for setting the corresponding accompanying test unit through the parameters, giving out proper exciting current, setting proper armature overload and overvoltage parameters and adjusting the loading rate of the accompanying test unit. The motor test platform has the advantages that feedback requirements of a single direct current frequency converter corresponding to a plurality of loading motors with different power levels are innovatively realized through the composite motor loading loop, and the working efficiency of the motor test platform is greatly improved.
Description
Technical Field
The invention relates to the technical field of motor test platforms, in particular to a feedback small motor test platform.
Background
The electric power consumption of the motor transmission system is the power consumption machinery with the largest electric power consumption in China, is the most important power source in the coal mine industry, and is counted to be 75% of the industrial electric power consumption, so that the running efficiency of the traditional Chinese motor system is 10% -20% lower than that of the advanced level in the foreign country. The Chinese high-efficiency motor test system is very lacking, and the long-term importance of each motor production enterprise on the test system is insufficient, so that most of test tables of factories cannot finish high-precision test tasks.
How to improve the efficiency of a motor test platform is a technical problem to be solved in the field.
Disclosure of Invention
Aiming at the technical problem of low efficiency of the existing motor test platform, the purpose of the scheme is to provide a feedback small motor test platform, which creatively realizes the feedback requirement of a single direct current frequency converter corresponding to a plurality of loading motors with different power levels through a composite motor loading loop, thereby greatly improving the working efficiency of the motor test platform and well overcoming the problems existing in the prior art.
In order to achieve the purpose, the feedback small motor test platform provided by the invention comprises a tested motor, a plurality of accompanying test units, a feedback device and a control system; the tested motor is respectively connected with a plurality of accompanying test units; the test accompanying units are respectively connected with the feedback mechanism in a controlled manner; the control system is respectively connected with a plurality of groups of tested motor groups and feedback devices in a driving way and performs data transmission; the control system is used for selecting and starting the accompanying test unit, and transmitting parameters of the corresponding accompanying test unit to the feedback device, and the feedback device is used for setting the corresponding accompanying test unit through the parameters, giving out proper exciting current, setting proper armature overload and overvoltage parameters and adjusting the loading rate of the accompanying test unit.
Further, the test accompanying units are arranged in parallel and are respectively connected with the tested motor to form loading units with different powers.
Further, the control system comprises a selection mechanism, a PLC controller and a photoelectric encoder; the selection mechanism is in driving connection with the accompanying test unit and is connected with the PLC controller for signal transmission; and the photoelectric encoder is connected with the accompanying test unit and connected with the PLC controller for signal transmission.
Further, the PLC controller comprises a control module, a photoelectric input module and a communication module; the control module and the communication module perform signal transmission; the photoelectric encoder and the photoelectric input module perform signal transmission; the photoelectric input module and the communication module perform signal transmission; and the communication module and the feedback device perform data transmission.
Further, the selecting mechanism, the control module, the communication module and the feedback mechanism are sequentially connected to perform data transmission to form a driving part of the tested motor.
Further, the photoelectric encoder, the photoelectric input module, the communication module and the feedback mechanism are sequentially connected to perform data transmission to form a loading part of the tested motor.
According to the feedback small motor test platform provided by the invention, through the composite motor loading loop, the feedback requirements of a single direct current frequency converter corresponding to a plurality of loading motors with different power levels are innovatively realized, and the working efficiency of the motor test platform is greatly improved.
Drawings
The invention is further described below with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of the structure of the feedback small motor test platform;
FIG. 2 is a schematic diagram of a control loop of the feedback-type small motor test platform.
Detailed Description
The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
Aiming at the technical problem of low efficiency of the existing motor test platform, the purpose of the scheme is to provide a feedback small motor test platform which is characterized in that the feedback requirement of a single direct current frequency converter corresponding to a plurality of loading motors with different power levels is innovatively realized through a composite motor loading loop, the equipment cost is greatly saved, the fault point is reduced, the field occupation is saved, and the novel and efficient loading feedback structure is provided for a large motor test room.
Referring to fig. 1, the feedback small motor test platform provided by the scheme comprises a tested motor 100, a test accompanying unit 200, a feedback device 300 and a control system 400.
The tested motor 100 is connected with the accompanying test unit 200 through a coupler, and mechanical energy of the tested motor 100 is transmitted to a shaft of the accompanying test unit 200 through the coupler to drive the shaft to operate.
Further, one end of the accompanying test unit 200 is connected with the tested motor 100; for coupling with the test motor 100 and converting the mechanical power of the test motor 100 into direct current.
The armature and the exciting loop of the direct current motor of the accompanying test unit 200 are connected with the feedback device in a hard-wired mode; by the rotation of the shaft of the test unit 200, the armature circuit of the test unit 200 generates a dc electromotive force.
After the main circuit of the power device of the feedback device 300 obtains the direct-current electromotive force, the direct-current power is converted into three-phase alternating current by the inversion function of the inversion bridge, and the three-phase alternating current is transmitted back to the upper-level power grid.
It should be noted that, to accommodate the motor test requirements of different power classes, three loading accompanying motors are arranged in total to form an accompanying test unit 200, namely a first loading accompanying motor 210, a second loading accompanying motor 220 and a third loading accompanying motor 230, and the powers of the two accompanying motors are 4KW,11KW and 22KW respectively.
The number of the test-accompanying units 200 is not limited to three; and the power of each loading accompanying unit 200 is not limited to the above 4KW,11KW and 22KW; the specific situation can be determined according to the actual situation.
Further, the control system 400 is connected to the test machine set 200 and the feedback device 300, respectively, and is used for controlling the operation states of the test machine set 200 and the feedback device 300 and the given loading rate; which includes a selection mechanism, a PLC controller, and a photoelectric encoder 410.
The PLC is the core of the control system and comprises a control module, a photoelectric input module and a communication module; wherein, the photoelectric input module, the communication module and the photoelectric encoder 410 are mutually matched to form a loading structure of the test accompanying motor set 200; the control module and the communication module cooperate with each other to form a driving structure of the accompanying test motor unit 200.
The selection mechanism is a selection switch, and is respectively arranged on each group of test accompanying units 200, and is used for selecting the test accompanying units 200 and connecting with a control module of the PLC.
When a user needs to start a certain group of loading units, a corresponding selection switch is switched to the starting position, and a switching value signal of the selected accompanying test unit 200 is transmitted to a control module of the PLC; after receiving the switching value signal, the control module of the PLC controller transmits the corresponding parameters and settings of the corresponding accompanying test unit 200 to the feedback device 300 through the communication module, and the feedback device 300 sets the selected unit according to the corresponding parameters and gives out proper exciting current, thereby setting proper armature overload and overvoltage parameters.
The photoelectric encoder 410 is connected with the PLC controller; the photoelectric encoder 410 is used for adjusting the loading rate of the motor to be tested.
When the tested motor 100 drives the accompanying test unit 200 to rotate, the unit armature establishes direct current electromotive force, then a tester rotates the photoelectric encoder 410, an analog signal of the photoelectric encoder 410 is transmitted to a photoelectric input module of the PLC, an optical signal of the photoelectric encoder is converted into an electric signal, the electric signal is processed into a communication signal by a communication module, the communication signal is transmitted to the feedback device 300, and the feedback device 300 adjusts the loading rate according to the signal, so that controllable loading is realized.
The working process of the scheme in use is illustrated below; the following description is merely a specific application example of the present embodiment, and is not limited to the present embodiment.
Referring to fig. 2, the test stand power supply is first powered, and the 380V power supply of the controller is turned on through the suction of the isolating switch and the contactor. The load accompanying motor 200 which is specifically used is selected through the change-over switch, 4Kw,11Kw and 22Kw are optional, after the load accompanying motor 200 is selected, whether the corresponding indicator lamp of the loader is lighted or not is observed, and when the lamp is lighted, the display system is fault-free and can normally operate.
At this time, the switching value signal of the corresponding unit is transmitted to the control system 400 through the change-over switch, the control system 400 transmits the parameter of the corresponding test unit 200 to the feedback device 300, the feedback device 300 sets the corresponding parameter to the selected unit and gives out the proper exciting current 240, and the proper armature overload 250 and overvoltage parameters are set.
After the tested motor is started, the tested motor 100 drags the loading test motor unit 200 to operate through the coupler, after the rotating speed is stable, the control system 400 firstly observes whether the direct current voltage sent by the loading unit meets the loading requirement, after confirming that the direct current voltage meets the loading requirement, the photoelectric encoder 410 is rotated, at the moment, the loading rate of the tested motor 100 is detected through the photoelectric encoder 410, the numerical value is transmitted to the control system 400, the control system 400 transmits the processed numerical value to the feedback device 300, and the feedback device 300 adjusts the loading rate according to the signal, so that the controllable loading is realized.
Finally, parameters such as torque, rotating speed, voltage, current, power and the like of the tested product are observed through instruments such as a torque instrument, a power analyzer and the like, and the numerical value is changed along with the increase of the loading rate, so that the purpose of loading is achieved.
The feedback small motor test platform formed by the scheme realizes the feedback requirement of a single direct current frequency converter corresponding to a plurality of loading motors with different power levels through the composite motor loading loop, greatly saves equipment cost, reduces fault points, saves field occupation in a motor test room with a plurality of loading units, and is a novel and efficient loading feedback structure for a large motor test room.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The feedback type small motor test platform is characterized by comprising a tested motor, a plurality of accompanying test units, a feedback device and a control system; the tested motor is respectively connected with a plurality of accompanying test units; the test accompanying units are respectively connected with the feedback mechanism in a controlled manner; the control system is respectively connected with a plurality of groups of tested motor groups and feedback devices in a driving way and performs data transmission; the control system is used for selecting and starting the test accompanying unit, transmitting parameters of the corresponding test accompanying unit to the feedback device, setting the corresponding test accompanying unit through the parameters, giving proper exciting current, setting proper armature overload and overvoltage parameters and adjusting the loading rate of the test accompanying unit;
one end of the accompanying test machine set is connected with the tested motor and used for converting the mechanical power of the tested motor into direct current; the armature and the excitation loop of the direct current motor of the test accompanying unit are connected with the feedback device in a hard-wired mode, the armature loop of the test accompanying unit generates direct current electromotive force through rotation of the shaft of the test accompanying unit, and after the power device main loop of the feedback device obtains the direct current electromotive force, the direct current is converted into three-phase alternating current through inversion action of an inversion bridge and is transmitted back to a superior power grid;
firstly, selecting a specific used loading accompanying motor in the test platform, transmitting a switching value signal of a corresponding unit to a control system through a change-over switch, and transmitting parameters of the corresponding accompanying unit to a feedback device by the control system, wherein the feedback device sets the selected accompanying unit according to the corresponding parameters and gives out proper exciting current, and sets proper armature overload and overvoltage parameters; and then starting the tested motor, dragging the tested motor to load the test accompanying motor group to operate through the coupler, observing whether the direct-current voltage sent by the loading unit meets the loading requirement or not through the control system after the rotating speed is stable, detecting the loading rate of the tested motor after confirming that the direct-current voltage meets the loading requirement or not, transmitting the value to the control system, transmitting the processed value to the feedback device, and adjusting the loading rate by the feedback device according to the received signal by the control system, so that controllable loading is realized.
2. The feedback small motor test platform according to claim 1, wherein the accompanying test units are arranged in parallel and are respectively connected with the tested motor to form loading units with different powers.
3. The feedback mini-motor test platform of claim 1, wherein the control system comprises a selection mechanism, a PLC controller, and a photoelectric encoder; the selection mechanism is in driving connection with the accompanying test unit and is connected with the PLC controller for signal transmission; and the photoelectric encoder is connected with the accompanying test unit and connected with the PLC controller for signal transmission.
4. A feedback mini-motor test platform according to claim 3, wherein the PLC controller comprises a control module, a photovoltaic input module and a communication module; the control module and the communication module perform signal transmission; the photoelectric encoder and the photoelectric input module perform signal transmission; the photoelectric input module and the communication module perform signal transmission; and the communication module and the feedback device perform data transmission.
5. The feedback-type small motor test platform as claimed in claim 4, wherein the selection mechanism, the control module, the communication module and the feedback mechanism are sequentially connected to perform data transmission to form a driving part of the tested motor.
6. The feedback-type small motor test platform according to claim 4, wherein the photoelectric encoder, the photoelectric input module, the communication module and the feedback mechanism are sequentially connected to perform data transmission to form a loading part of the tested motor.
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| CN202111475068.1A CN114114013B (en) | 2021-12-03 | 2021-12-03 | Feedback small motor test platform |
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| CN202111475068.1A CN114114013B (en) | 2021-12-03 | 2021-12-03 | Feedback small motor test platform |
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| CN114114013B true CN114114013B (en) | 2024-04-09 |
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