CN112230089A - Coal mining machine frequency converter drag-pair loading experimental equipment - Google Patents
Coal mining machine frequency converter drag-pair loading experimental equipment Download PDFInfo
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- CN112230089A CN112230089A CN202011126970.8A CN202011126970A CN112230089A CN 112230089 A CN112230089 A CN 112230089A CN 202011126970 A CN202011126970 A CN 202011126970A CN 112230089 A CN112230089 A CN 112230089A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
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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
Abstract
The invention relates to coal cutter frequency converter drag-pair loading experimental equipment, which comprises a main motor drag-pair loading experimental device and a slave motor drag-pair loading experimental device, wherein the main motor drag-pair loading experimental device comprises a main tested motor, a main accompanying motor, a main tested frequency converter and a main accompanying frequency converter which are respectively used for driving the main tested motor and the main accompanying motor, output shafts of the main tested motor and the main accompanying motor are coaxially and fixedly connected, the slave motor drag-pair loading experimental device comprises a slave tested motor, the auxiliary test motor and the auxiliary test frequency converter which are respectively used for driving the auxiliary test motor and the auxiliary test motor are coaxially and fixedly connected with the output shaft of the auxiliary test motor and the auxiliary test motor, the main test motor and the output shaft of the auxiliary test motor are connected through a chain wheel and a chain, and the main test frequency converter and the auxiliary test frequency converter are controlled by torque. The invention can realize the master-slave performance test and can more truly reflect the field working condition of the coal mining machine traction debugging system.
Description
Technical Field
The invention relates to experimental equipment for a frequency converter of a coal mining machine, which is suitable for motor loading, master-slave load regulation and other types of experiments of the frequency converter of the coal mining machine for mining.
Background
In recent years, the technology of coal mining machines is rapidly developed, and in general, "frequency conversion + motor dragging" is still the only mainstream traction mode on the coal mining machines. The traction speed regulation system of the coal mining machine usually adopts a one-to-one mode, namely two frequency converters respectively drag two traction motors, and the two frequency converters are respectively arranged as a host and a slave.
At present, the main experimental means for the frequency converter of the coal mining machine is still drag loading, namely, the output shaft of the tested motor is in hard connection with the output shaft of the accompanying motor, and the accompanying frequency converter is designed to be controlled by torque and serves as the load of the tested motor. The existing coal mining machine frequency converter loading experimental equipment can only load a single tested motor or respectively and independently load two tested motors, and cannot realize the coupling between the loads of a master tested motor and a slave tested motor, so that the master-slave regulation performance of the master tested motor and the slave tested motor cannot be tested, and the actual load condition of a coal mining machine traction motor cannot be simulated. Specifically speaking, the method comprises the following steps: during loading, if a load is applied to a single motor, the rotating speed difference of the two motors is always in the maximum value of the speed window and cannot be adjusted to be in speed balance; if loads are applied to the two motors at the same time, once the speed fluctuates, the speed enters the limit value of the speed window, and the actual change condition of load adjustment of the two motors cannot be reflected, so that the loading experiment and the master-slave performance test of the two tested motors cannot be performed at the same time.
In addition, a two-quadrant frequency converter is generally adopted in a frequency converter in the existing experimental equipment, feedback energy is consumed through a brake resistor, and energy is not saved enough.
Disclosure of Invention
The invention aims to provide a coal cutter frequency converter twin-towing loading experimental device which can simulate the load balance state of two traction motors of a coal cutter, realize the master-slave load balance performance test of a master tested motor and a slave tested motor, reflect the field working condition of a coal cutter towing debugging system more truly and improve the reliability of the experimental result.
The main technical scheme of the invention is as follows:
a coal mining machine frequency converter counter-dragging loading experimental device comprises a main motor counter-dragging loading experimental device and a slave motor counter-dragging loading experimental device, the main motor counter-dragging loading experimental device comprises a main tested motor, a main accompanying motor, a main tested frequency converter and a main accompanying frequency converter which are respectively used for driving the main tested motor and the main accompanying motor, the output shafts of the main tested motor and the main accompanying motor are coaxially and fixedly connected, the auxiliary motor counter-pulling loading experiment device comprises an auxiliary tested motor, an auxiliary accompanying motor, an auxiliary tested frequency converter and an auxiliary accompanying frequency converter, wherein the auxiliary tested frequency converter and the auxiliary accompanying frequency converter are respectively used for driving the auxiliary tested motor and the auxiliary accompanying motor, the output shafts of the slave tested motor and the slave accompanying motor are coaxially and fixedly connected, the output shafts of the master tested motor and the slave tested motor are connected through a chain wheel and a chain, and the master accompanying frequency converter and the slave accompanying frequency converter are controlled by torque.
The output shafts of the main tested motor and the main test accompanying motor are fixedly connected through a main coupler, the output shafts of the auxiliary tested motor and the auxiliary test accompanying motor are fixedly connected through an auxiliary coupler, a main chain wheel and an auxiliary chain wheel are respectively and coaxially and fixedly installed on the main coupler and the auxiliary coupler, and the chain is wrapped on the main chain wheel and the auxiliary chain wheel and is meshed with the main chain wheel and the auxiliary chain wheel simultaneously.
The coal mining machine frequency converter drag-loading experimental equipment further comprises a main motor torque sensor and a slave motor torque sensor, wherein the main motor torque sensor and the slave motor torque sensor are fixedly installed relative to an output shaft of a main tested motor and an output shaft of a slave tested motor respectively.
The accuracy grade of the master motor torque sensor and the slave motor torque sensor is not less than 0.1.
The main tested motor, the main accompanying and testing motor, the auxiliary tested motor and the auxiliary accompanying and testing motor are fixed on the experiment table base to form a testing platform, and the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter are installed on the operation table.
The control device is characterized in that the operating platform is further provided with a control device and an operating button, the control device controls the master accompanying and testing frequency converter and the slave accompanying and testing frequency converter through two buses respectively, and the output end of the operating button is connected with the input end of the control device.
The operation buttons comprise a variable frequency power supply starting button, a variable frequency power supply stopping button, a load power supply starting button, a load power supply stopping button, a single and linkage mode switching button, a first load starting button, a first load stopping button, a second load starting button, a second load stopping button, a first load torque setting knob, a second load torque setting knob and a loading and feedback switching toggle button.
The main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter preferably adopt four-quadrant frequency converters, and rectification and inversion modules in the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter adopt IGBTs.
The invention has the beneficial effects that:
the invention adds hard connection coupling between the main tested motor and the slave tested motor, so that the corresponding counter-dragging loading experimental equipment can carry out a simulation working condition experiment on the load balance of the two traction motors, and can carry out the main-slave load balance performance test of the main tested motor and the slave tested motor. As the field working condition of the traction speed regulation system of the coal mining machine can be simulated to the maximum extent, the test result has more convincing, credibility and referential significance.
The master accompanying and testing frequency converter and the slave accompanying and testing frequency converter adopt four-quadrant frequency converters, and the rectification and inversion modules adopt IGBTs (insulated gate bipolar transistors), so that energy can be fed back to a power grid in a feedback state, and more energy is saved.
Drawings
FIG. 1 is a functional block diagram of the present invention;
FIG. 2 is a layout diagram of one embodiment of a test platform of the present invention;
fig. 3 is a layout diagram of one embodiment of the present invention.
Reference numerals:
1. a main tested motor; 2. from the machine under test; 3. a main accompanying motor; 4. a slave motor tester; 5. a main tested frequency converter; 6. from the frequency converter under test; 7. a master accompanying and testing frequency converter; 8. a slave trial frequency converter; 9. a main motor torque measurement sensor; 10. a slave motor torque sensor; 11. a chain; 12. a high voltage fuse; 13. a laboratory bench base; 14. an operation table; 15. a main sprocket; 16. a slave sprocket; 17. a control device; 18. an operation button; 19. and (4) an upper computer.
Detailed Description
The invention discloses a coal cutter frequency converter twin-drag loading experimental device (which can be called as an experimental device for short), which comprises a main motor twin-drag loading experimental device and an auxiliary motor twin-drag loading experimental device as shown in figures 1-3. The main motor counter-dragging loading experimental device comprises a main tested motor 1, a main accompanying motor 3, a main tested frequency converter 5 and a main accompanying frequency converter 7, wherein the main tested frequency converter 5 and the main accompanying frequency converter are respectively used for driving the main tested motor and the main accompanying motor. And the output shafts of the main tested motor and the main test-accompanying motor are coaxially and fixedly connected. The auxiliary motor counter-pulling loading experimental device comprises an auxiliary tested motor 2, an auxiliary accompanying motor 4, and an auxiliary tested frequency converter 6 and an auxiliary accompanying frequency converter 8 which are respectively used for driving the auxiliary tested motor and the auxiliary accompanying motor. And the output shafts of the slave tested motor and the slave accompanying motor are coaxially and fixedly connected. The output shafts of the main and slave electric motors under test 1 and 2 are connected by a sprocket and a chain 11. The invention can not only carry out loading, master-slave control and remote control experiments, but also realize the simulation of the load coupling characteristic between the master motor and the slave motor because the chain wheel and the chain are used for connecting the master tested motor and the slave tested motor, when the master motor is used for dragging the loading experiment device and the slave motor is used for dragging the loading experiment device simultaneously, the field working condition of the traction speed regulating system of the coal mining machine can be simulated to the maximum extent, the master-slave performance test (which can be simply called as master-slave performance test) between the master tested frequency converter and the slave tested frequency converter can be carried out, so that the test result can better reflect the real working condition of the working of the frequency converter of the coal mining machine, and has convincing power, credibility and referential significance.
The main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter are controlled by torque, are used for simulating the loads of a main tested motor and an auxiliary tested motor, are usually in a remote control state, are controlled by an operating console, and can realize direction switching so as to enable the tested motors to be in a loading state and a feedback state. The tested frequency converter can respectively realize remote and near control, start and stop, speed increase and decrease and direction switching. The invention can be used for detecting the performance and the working condition of two tested frequency converters, and can complete the load and communication test of the main tested frequency converter, the load and communication test of the slave tested frequency converter, the communication and control test between the main tested frequency converter and the slave tested frequency converter, the master-slave performance test and the like. When other tests than the master-slave performance test are performed, including the loading characteristics, remote control, and the like, the experiment can be performed without connecting the chain. Each motor can be controlled individually.
Each frequency converter is connected to the power grid through a high-voltage fuse 12, which is used for protecting the frequency converter. Several frequency converters may share a single high voltage fuse.
Further, the output shafts of the main tested motor and the main test-assistant motor are preferably fixedly connected through a main coupler, the output shafts of the slave tested motor and the slave test-assistant motor are preferably fixedly connected through a slave coupler, a main chain wheel 15 and a slave chain wheel 16 are respectively and coaxially and fixedly installed on the main coupler and the slave coupler, and the chain 11 is wound on the main chain wheel and the slave chain wheel and is meshed with the main chain wheel and the slave chain wheel simultaneously, so that the output shafts of the main tested motor 1 and the slave tested motor 2 are connected through the chain wheels and the chain 11.
The coal mining machine frequency converter drag-loading experimental equipment further comprises a main motor torque sensor 9 and a slave motor torque sensor 10, wherein the main motor torque sensor and the slave motor torque sensor are fixedly installed relative to an output shaft of a main tested motor and an output shaft of a slave tested motor respectively and are used for detecting the actual load and the change conditions of the load on the output shafts of the main tested motor and the slave tested motor in real time.
The rotating speed of the main motor torque sensor and the auxiliary motor torque sensor can reach 30000rpm, and the precision level is not less than 0.1.
The main tested motor, the main accompanying and testing motor, the auxiliary tested motor and the auxiliary accompanying and testing motor are fixed on the experiment table base 13 to form a test platform, the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter are installed on the operation table 14, the experiment table base and the operation table are independent, and only the main accompanying and testing motor and the auxiliary accompanying and testing frequency converter are electrically connected with each other. The operation panel is usually arranged indoors, and is convenient for an operator to operate remotely. The master and slave frequency converters to be tested are usually placed in separate areas outside the test platform and the operation table.
The operation table is also provided with a control device (PLC)17 and an operation button 18, the control device respectively controls the master accompanying and testing frequency converter and the slave accompanying and testing frequency converter through two paths of buses, specifically, control instructions and setting are sent to the two frequency converters, and status words and status data are received from the two frequency converters. The master accompanying frequency converter and the slave accompanying frequency converter can be given at the same time or separately. The output end of the operating button is connected with the input end of the control device and is used for controlling instructions and giving input.
The operating platform is further provided with an upper computer 19, and the upper computer is in two-way communication connection with the control device.
The operation buttons comprise a variable frequency power supply starting button, a variable frequency power supply stopping button, a load power supply starting button, a load power supply stopping button, a single and linkage mode switching button, a first load starting button, a first load stopping button, a second load starting button, a second load stopping button, a first load torque setting knob, a second load torque setting knob and a loading and feedback switching toggle button. The loading and feedback switching toggle button can simultaneously adjust the directions of the two motors, so that the main motor and the driven motor to be tested are switched between loading and feedback states. The first load torque setting knob and the second load torque setting knob are used for setting torque set values REF of the two accompanying frequency converters, and the set values can be adjusted from 0% to 100%.
The process of simultaneously carrying out loading test on two tested motors by adopting the experimental equipment provided by the invention is as follows:
1) pressing a power supply starting button of a main test accompanying frequency converter, observing the steering of a main test accompanying motor, and confirming the steering of the motor;
2) pressing a power supply starting button of the slave accompanying and testing frequency converter, observing whether the steering directions of the master accompanying and testing motor and the slave accompanying and testing motor are the same, and if the steering directions are different, switching the rotating direction of the slave accompanying and testing motor;
setting the speed of a main tested frequency converter to be 1500rpm, pressing a power supply starting button of the main tested frequency converter, operating a main tested motor and a slave tested motor at the moment, observing the running directions of the two motors, and ensuring that the running directions of the main tested motor and the slave tested motor are opposite to the running directions of corresponding auxiliary tested motors;
3) pressing a first load starting button and a second load starting button, observing the operation of the master and slave accompanying and testing motors, and respectively loading the current of the master and slave accompanying and testing motors to the rated current through a first load torque setting knob and a second load torque setting knob;
4) and when the motor runs stably, reading the data of the master motor and the slave motor to be tested, and storing the data curve recorded by the upper computer. The master-slave regulation process is observed through a data curve recorded by the upper computer, the master-slave regulation performance of the master motor and the slave motor is tested, and the master-slave regulation performance can be reflected through testing indexes such as current unbalance degree of the master motor and the slave motor.
When the experimental equipment is used for testing the master-slave performance, the normal meshing state of the chain and the master and slave chain wheels is firstly confirmed. During testing, no matter loading is carried out on a single tested motor or loading is carried out on a main tested motor and a slave tested motor simultaneously, the output shafts of the main tested motor and the slave tested motor are coupled through a chain and a chain wheel, and the two tested motors can be finally adjusted to be balanced in speed under normal conditions.
For any one of the coal mining machine frequency converter drag-pair loading experimental equipment, the master accompanying and testing frequency converter and the slave accompanying and testing frequency converter preferably adopt four-quadrant frequency converters, the rectification and inversion modules adopt IGBTs, energy can flow in two directions, and the energy can be fed back to a power grid when the master accompanying and testing motor 3 and the slave accompanying and testing motor 4 are in a feedback state, so that more energy is saved. The main frequency converter to be tested and the auxiliary frequency converter to be tested can be two-quadrant frequency converters or four-quadrant frequency converters.
The invention can perform simulation test on the coal mining machine traction system, comprises the performance detection of the motor control, the master-slave control and the remote control of the frequency converters, can perform actual test on the operation characteristic parameters of the frequency converter products, can perform the frequency conversion loading performance test of two frequency converters at the same time, can complete the performance test of the master-slave frequency converter suitable for the coal mining machine traction speed regulating system, verifies the reliability of the products, and has the characteristics of comprehensive functions, convenient operation, energy conservation, environmental protection and the like.
Claims (8)
1. The utility model provides a coal-winning machine converter is to dragging loading experimental facilities which characterized in that: including main motor to dragging loading experimental apparatus and from motor to dragging loading experimental apparatus, main motor is to dragging loading experimental apparatus including the owner by the motor of trying, the owner accompany the motor of trying and is used for driving the owner by the motor of trying and the owner to accompany the converter of trying of motor respectively, the coaxial fixed connection of output shaft of the motor of mainly trying and the owner of accompanying the motor of trying, from motor to dragging loading experimental apparatus including from by the motor of trying, from accompany the motor and be used for driving respectively from the motor of trying and from the motor of accompanying the motor from the converter of trying and from accompanying the converter of trying, from the coaxial fixed connection of output shaft of the motor of trying and following the motor of accompanying, main by the motor of trying and from being connected through sprocket, chain between the output shaft of the motor of trying, the main converter of accompanying with trying and all adopting torque control from accompanying the converter.
2. The coal mining machine frequency converter drag-pair loading experimental equipment as claimed in claim 1, characterized in that: the output shafts of the main tested motor and the main test accompanying motor are fixedly connected through a main coupler, the output shafts of the auxiliary tested motor and the auxiliary test accompanying motor are fixedly connected through an auxiliary coupler, a main chain wheel and an auxiliary chain wheel are respectively and coaxially and fixedly installed on the main coupler and the auxiliary coupler, and the chain is wrapped on the main chain wheel and the auxiliary chain wheel and is meshed with the main chain wheel and the auxiliary chain wheel simultaneously.
3. The coal mining machine frequency converter drag-pair loading experimental equipment as claimed in claim 2, characterized in that: the device is characterized by further comprising a main motor torque sensor and a slave motor torque sensor, wherein the main motor torque sensor and the slave motor torque sensor are fixedly installed relative to the output shaft of the main tested motor and the output shaft of the slave tested motor respectively.
4. The coal mining machine frequency converter drag-pair loading experimental equipment as claimed in claim 3, characterized in that: the accuracy grade of the master motor torque sensor and the slave motor torque sensor is not less than 0.1.
5. The coal mining machine frequency converter twin-trailed loading experimental facility as claimed in claim 1, 2, 3 or 4, characterized in that: the main tested motor, the main accompanying and testing motor, the auxiliary tested motor and the auxiliary accompanying and testing motor are fixed on the experiment table base to form a testing platform, the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter are installed on the operation table, and the experiment table base and the operation table are independent respectively.
6. The coal mining machine frequency converter drag-pair loading experimental facility as claimed in claim 5, characterized in that: the control device is characterized in that the operating platform is further provided with a control device and an operating button, the control device controls the master accompanying and testing frequency converter and the slave accompanying and testing frequency converter through two buses respectively, and the output end of the operating button is connected with the input end of the control device.
7. The coal mining machine frequency converter drag-pair loading experimental facility as claimed in claim 6, characterized in that: the operation buttons comprise a variable frequency power supply starting button, a variable frequency power supply stopping button, a load power supply starting button, a load power supply stopping button, a single and linkage mode switching button, a first load starting button, a first load stopping button, a second load starting button, a second load stopping button, a first load torque setting knob, a second load torque setting knob and a loading and feedback switching toggle button.
8. The coal mining machine frequency converter drag-pair loading experimental facility as claimed in claim 1, 2, 3, 4, 5, 6 or 7, characterized in that: the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter adopt four-quadrant frequency converters, and rectification and inversion modules in the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter adopt IGBTs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126970.8A CN112230089A (en) | 2020-10-20 | 2020-10-20 | Coal mining machine frequency converter drag-pair loading experimental equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126970.8A CN112230089A (en) | 2020-10-20 | 2020-10-20 | Coal mining machine frequency converter drag-pair loading experimental equipment |
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| Publication Number | Publication Date |
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| CN112230089A true CN112230089A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011126970.8A Pending CN112230089A (en) | 2020-10-20 | 2020-10-20 | Coal mining machine frequency converter drag-pair loading experimental equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092144A (en) * | 2021-05-08 | 2021-07-09 | 中车大连机车研究所有限公司 | Locomotive, motor car bogie test device |
| CN115015680A (en) * | 2022-08-08 | 2022-09-06 | 新风光电子科技股份有限公司 | Master-slave power balance test method for frequency converter |
-
2020
- 2020-10-20 CN CN202011126970.8A patent/CN112230089A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092144A (en) * | 2021-05-08 | 2021-07-09 | 中车大连机车研究所有限公司 | Locomotive, motor car bogie test device |
| CN115015680A (en) * | 2022-08-08 | 2022-09-06 | 新风光电子科技股份有限公司 | Master-slave power balance test method for frequency converter |
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