CN107765124A - A kind of blower variable-pitch driver aging testing system - Google Patents
A kind of blower variable-pitch driver aging testing system Download PDFInfo
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- CN107765124A CN107765124A CN201711025858.3A CN201711025858A CN107765124A CN 107765124 A CN107765124 A CN 107765124A CN 201711025858 A CN201711025858 A CN 201711025858A CN 107765124 A CN107765124 A CN 107765124A
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- 238000012360 testing method Methods 0.000 title claims abstract description 94
- 230000032683 aging Effects 0.000 title claims abstract description 37
- 230000005611 electricity Effects 0.000 claims abstract description 9
- 230000015556 catabolic process Effects 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000003032 molecular docking Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The present invention relates to a kind of blower variable-pitch driver aging testing system; the aging testing system is used for batch total power burn-in test in the factory of large-scale wind electricity unit electric variable propeller system AC servo driver, is mainly made up of computer, motor, tested driver, rectifier bridge, braking resistor, divider resistance, protection switch；Two tested drivers are one group during present invention test, control two connecting shaft motors respectively, two motors, one permanent rotating speed, a permanent moment of torsion is turned haul, while computer collection relevant parameter, analysis judge；The use of the present invention has saved the burn-in test time of variable pitch driver, has improved test effect, reduce the requirement of operating personnel, optimize cost of human resources；The operational support batch aging testing progress and product quality of blower fan variable pitch driver product of the present invention.
Description
Technical field
The present invention relates to a kind of blower variable-pitch driver aging testing system, belong to technical field of wind power generation.
Background technology
Wind-power electricity generation is the important form of wind energy utilization, and wind energy is the energy renewable, pollution-free, that energy is big, prospect is wide,
Greatly develop the strategic choice that clean energy resource is countries in the world.With the quickening of world energy consumption, traditional energy reserves subtract
Few, this green energy resource of wind-power electricity generation is increasingly paid attention to, and has inexhaustible advantage.Countries in the world are all
Put into effect every policy and vigorously support Wind Power Generation Industry, the Wind Power Generation Industry in China was also developed rapidly in recent years, with grid type
Wind turbines turn into the best form that wind-powered electricity generation utilizes, and domestic and international wind power generating set progressively develops in terms of maximization.
The continuous development of Large-scale Wind Turbines is particularly important the application of electric variable propeller system, blower variable-pitch system
Unite for the angle for adjusting wind power generating set blade, be one of safety control of unit, electric variable propeller system includes watching
Take driver, servomotor, backup power system and blade sensor etc..
Pitch-controlled system receives the control command of fan master control system, and control fan blade rotates to the angle of setting, passed through
The angle of blade is controlled to control the rotating speed of wind wheel, and then controls the power output of blower fan.Pitch-controlled system is also the pneumatic of blower fan
Brake, in emergency situations, control blade are quickly put away the oars, and are shut down fan safe by way of aerodynamic braking, are reached
To the purpose of protection unit safety；The core drive control component of electric variable propeller system is variable pitch driver.
The continuous development of Large-scale Wind Turbines makes the product test of electric variable propeller system and continued new using facing
Challenge, in order to ensure the overall hardware performance of large-scale wind electricity unit electric variable propeller system AC servo driver, to blower variable-pitch
Driver burn-in test is essential.
Publication No. is that the A of CN 102508484 Chinese patent document discloses a kind of servo-driver ageing testing method
And system.This method performs burn-in test to drive products based on motor to the technical scheme dragged, but the program is using simple
Timing control unit perform testing and control, and according only to whether breaking down simple to judge whether, by test, do not have
Specific test index, the overall hardware performance with analysis-driven device product can not be tested based on multi objective from many aspects；Simultaneously
The less effective in terms of test and management such as test data record storage, and the no safety of driver during test is performed
Ensure, when a driver breaks down in test, security incident easily occur.
The content of the invention
It is an object of the invention to provide a kind of blower variable-pitch driver aging testing system, is surveyed to solve existing driver
The problem of test system can not find the overall hardware performance with analysis-driven device product based on multi objective from many aspects.
To achieve the above object, the solution of the present invention includes：
A kind of blower variable-pitch driver aging testing system of the present invention, including processor and at least a set of test list
Member, the test cell include the first motor and the second motor；First motor joins with second motor shaft, and described first
Motor is by the first tested driver control, and second motor is by the second tested driver control；The processor is used to connect
Described first tested driver and the second tested driver；
During test, the described first tested driver controls first motor operation using speed control mode, and described the
Two tested drivers control second motor operation, the second motor described in first motor drag using torque control model
Rotate, the DC side of the described first tested driver and the second tested driver is directly connected to；The tested driver will be respective
The driver temperature value of collection is uploaded to the processor, and the processor judges whether the temperature value is normal.
The present invention, to the scheme dragged, is saved load cost, at least two drivers can be carried out simultaneously using motor
Burn-in test, the burn-in test time of variable pitch driver is saved；In addition to driver malfunction state is monitored, also driver is adopted
Collection relevant mode analog quantity state is effectively recorded and judges whether normally, to improve test effect, reduce wanting for operating personnel
The burn-in test progress and product quality ask, optimize cost of human resources, ensured blower fan variable pitch driver product, and then
It ensure that pitch-controlled system and the total quality and operational reliability of wind power generating set.
Further, the tested driver also each gathers corresponding motor temperature value, driver bus voltage value, electricity
Operational factor including machine tachometer value and motor torque value, and the processor is uploaded to, the processor judges the operation
Whether parameter is normal.
The present invention carries out the overall hardware performance of burn-in test and analysis-driven device product based on many index to driver.
Further, the bus positive voltage port DC+ of the described first tested driver and the described second tested driver
The port DC+ connections of bus positive voltage, the bus negative voltage port DC- of the described first tested driver and the described second tested driving
The bus negative voltage port DC- connections of device.
The mode that the test system of the present invention employs bus connection is tested driving when motor is to dragging operation by second
The motor feedback energy of device is parallel to pass to the first tested driver, electric energy when which optimizes motor to dragging test run
Supply, complete the power consumption for reducing test system main power source while test purpose.
Further, the back-up source positive voltage collection port BA+ of the described first tested driver and described second is tested
The back-up source positive voltage collection port BA+ connections of driver, the tested driver back-up source negative voltage collection port are
DC-；First divider resistance is connected in parallel on DC- the and BA+ connecting lines of described first, second tested driver, the second divider resistance
It is connected in parallel on BA+ the and DC+ connecting lines of described first, second tested driver, described first, second tested driver collection institute
The voltage at first, second divider resistance both ends is stated as analog backup supply voltage and respectively by after the simulation each gathered
Stand-by power source voltage is uploaded to the processor, and the processor judges whether collection value is normal.
The back-up source magnitude of voltage of driver analog acquisition is tested also described in acquisition and recording, and is judged whether just by computer
Often.
Further, in addition to control terminal, the control terminal and the breakdown judge of described first, second tested driver are opened
It is connected after closing series connection with the Enable Pin of described first, second tested driver；The breakdown judge switch is in respective drivers event
Disconnected during barrier；When the Enable Pin can not be received to induction signal, respective drivers are stopped.
Any driver, which breaks down, during burn-in test can make two drivers all be stopped, it is ensured that burn-in test
Process safety is carried out.
Further, in addition to braking release power supply, the braking release power supply are connected by air switch with rectifier bridge
First, second motor.
Further, the maximum driving torque of second motor is less than the nominal drive torque of first motor.
Further, the processor connects the described first tested driver and the second tested drive by serial interface cable
Dynamic device.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of blower variable-pitch driver aging testing system of the present invention；
Fig. 2 is that blower variable-pitch driver aging testing system of the present invention is tested driver dc bus connection diagram；
Fig. 3 is the monolithically fabricated figure of blower variable-pitch driver aging testing system of the present invention；
Fig. 4 is the integrated testability flow chart of blower variable-pitch driver aging testing system of the present invention.
Embodiment
The present invention will be further described in detail below in conjunction with the accompanying drawings.
A kind of circuit theory diagrams of blower variable-pitch driver aging testing system as shown in Figure 1.The aging testing system
Mainly by computer 01, motor 02,03,04,05, tested driver 06,07,08,09, rectifier bridge 10,11, braking resistor 12,13,
14th, 15, divider resistance 16,17, protection switch 18,19,20,21 are formed；The computer 01 is connected simultaneously by AccessPort cable
Connect all tested drivers 06,07,08,09；The tested driver 06 connects the motor 02, the tested driver 07 connects
Connect the motor 03, the tested driver 08 connects the motor 04, the tested driver 09 connects the motor 05；Institute
State motor 02 to connect spindle machine by shaft coupling with motor 03, the motor 04 and motor 05 are by shaft coupling by main shaft machine
Tool connects；The motor braking release power supply interface of all motors 02,03,04,05 passes through the corresponding rectifier bridge 10,11 and sky
Air cock is connected with 230V AC powers；The braking resistor 12,13,14,15 and the corresponding tested driver 06,07,08,
09 is connected；Tested driver 06 is connected with the bus positive voltage port DC+ of tested driver 07, bus negative voltage port DC- phases
It is even, tested that driver 08 is connected with the bus positive voltage port DC+ of tested driver 09, bus negative voltage port DC- is connected, institute
It is as shown in Figure 2 to state tested driver dc bus catenation principle；The back-up source positive voltage collection port BA+ of tested driver 06
It is connected with the back-up source positive voltage collection port BA+ of tested driver 07, driver back-up source negative voltage collection port is
DC-, divider resistance 16 are connected in parallel on DC- the and BA+ connecting lines of tested driver 06 and tested driver 07, and divider resistance 17 is simultaneously
It is associated on BA+ the and DC+ connecting lines of tested driver 06 and tested driver 07, the tested driver 08 and tested driver
09 back-up source positive voltage collection port BA+ and the connection of divider resistance 18,19 are same as above；The 24V of the tested driver 06
Power supply is as signal power source, and the signal power source output end is switched by being tested the OK switches of driver 06 for breakdown judge, institute
State breakdown judge switch and the OK switches of driver 07, the tested driver 06,07 of connection are disconnected, be tested in respective drivers failure
Enabled control input input signal high level for driver normal work necessary condition, input signal low level when driver stop
Only working port.
A kind of monolithically fabricated figure of blower variable-pitch driver aging testing system as shown in Figure 3.The aging testing system
Tested driver 06,07,08,09, rectifier bridge 10,11, braking resistor 12,13,14,15, divider resistance 16,17, protection open
Close 18,19,20,21 parts to be assemblied in burn-in test cabinet 103, burn-in test cabinet 103 passes through serial communication line with computer 01
Cable 102 is attached, and burn-in test cabinet 103 passes through power and signal cable with motor 02, motor 03, motor 04, motor 05
108th, 109,110,111 it is attached, motor 02, motor 03 are arranged on motor docking mechanical platform 106, and motor output shaft leads to
Cross the docking of shaft coupling 107 to fix, motor 04, motor 05 are arranged on motor docking mechanical platform 115, and motor output shaft passes through connection
The docking of axle device 113 is fixed.
As shown in figure 1, the aging testing system by computer 01, motor 02,03,04,05 and tested driver 06,07,08,
09 tested driver category realizes the total power burn-in test of tested driver, test stream with the standard drive associated working of model
Journey is as shown in Figure 4.Computer 01 performs serial communication with tested driver 06,07,08,09 simultaneously, realizes the operation control of driver
System and status monitoring.
The aging testing system carries out concentrating operation control by computer 01 to tested driver 06,07,08,09, and adopts
The main analog amount collection value of the tested driver 06,07,08,09 of collection, judge the running status of tested driver 06,07,08,09
Whether normal, the main analog amount collection value of driver includes driver temperature value, motor temperature value, driver busbar voltage
Value, back-up source magnitude of voltage, motor speed value and motor torque value etc..
The aging testing system disposably carries out burn-in test to 4 drivers, and the computer 01 of test system and 4 are tested
Driver is attached simultaneously by serial communication, 4 tested drivers are attached with corresponding motor respectively, tested drive
Dynamic device 06 is attached with tested driver 07, tested driver 08 is attached with tested driver 09；It is tested to drive
Dynamic device 06,07,08,09 corresponds to controlled motor 02,03,04,05 and run by specified states respectively, while gathers the electricity of corresponding motor
Machine temperature value, motor speed value and motor torque value；Computer 01 judges whether every collection value of each tested driver is normal.
The motor braking release power supply of the aging testing system is obtained by exchanging 230V power supplys by rectifier bridge rectification, rectification
Motor braking that AC rectification exports is discharged power supply and supplies motor 02,03 simultaneously by bridge 10, and rectifier bridge 11 is by AC rectification
The motor braking release power supply of output supplies motor 04,05 simultaneously, and protection switch 20,23 is respectively to the place of rectifier bridge 10,11
Supply line is powered control and protection, and aging testing system is closed at protection switch 20,23 before starting working, it is ensured that each
Motor is in brake release state.
The controlled motor 02 of tested driver 06 of the aging testing system, the tested controlled motor 03 of driver 07, motor 02
Dragging operation, tested driver 06 are run using speed control mode controlled motor 02 with motor 03, tested driver 07 uses
Torque control model controlled motor 03 is run, and the maximum driving torque value of motor 03 is less than normal than the nominal drive torque value of motor 02
Certain value；When burn-in test starts, the dragging motor 03 of motor 02 is run, the drive that tested driver 06,07 will be gathered each respectively
Dynamic device temperature value, motor temperature value, driver bus voltage value, back-up source magnitude of voltage, motor speed value and motor torque value
Computer 01 is uploaded to by serial communication, computer 01 judges whether every collection value particularly driver temperature rise value is normal；It is tested
Driver 08,09 distinguishes controlled motor 04,05, and test process is identical and same with the test process of above-mentioned tested driver 06,07
Shi Jinhang.
As shown in Fig. 2 schematic diagrames, the bus positive voltage port DC+ of the tested driver 06 of the aging testing system is with being tested
The bus positive voltage port DC+ connections of driver 07, it is tested the bus negative voltage port DC- of driver 06 and tested driver 07
The port DC- connections of bus negative voltage, the test system will be by when by the way of bus connection in 02,03 pair of dragging operation of motor
The motor feedback energy of test driver 07 is parallel to pass to tested driver 06, when which optimizes motor to dragging operation
Electric energy supplies, and completes the power consumption for reducing test system main power source while test purpose；The company of tested driver 08,09
Connected mode and the test process for connecing mode and test process and above-mentioned tested driver 0607 are identical and carry out simultaneously.
Back-up source positive voltage collection port BA+ and the tested driver 07 of the tested driver 06 of the aging testing system
Back-up source positive voltage collection port BA+ connection driver back-up sources negative voltage to gather port be DC-, divider resistance 16
It is connected in parallel on DC- the and BA+ connecting lines of tested driver 06,07, divider resistance 17 is connected in parallel on the BA+ of tested driver 06,07
On DC+ connecting lines, driver 06,07 is tested by electric resistance partial pressure mode analog acquisition back-up source voltage and respectively by each
The analog backup supply voltage value of collection is uploaded to computer 01 by serial communication, and computer 01 judges whether collection value is normal；Quilt
Survey the connected mode of driver 08,09 and the connected mode and test process phase of test process and above-mentioned tested driver 06,07
Carry out together and simultaneously.
The 24V power output ends connection OK switch drivers of the tested driver 06 of the aging testing system switch when normal
Switched off when closure, driver malfunction, the OK of tested driver 06 switchs the OK switches of the tested driver 07 of connection, tested drive
The enabled control input input signal high level of the tested driver 06,07 of OK switch connections of dynamic device 07 is driver normal work
Driver is stopped port when necessary condition, input signal low level, and any driver breaks down during burn-in test
Two drivers can be made all to be stopped, it is ensured that burn-in test process safety is carried out.
In the present embodiment, a kind of blower variable-pitch driver aging testing system of the invention is carried out to 4 drivers simultaneously
Test, 2 are one group；As other embodiment, it can also correspond to reduce one group or increase some set drives progress and survey simultaneously
Examination, the present invention are not limited to the group number for being tested driver.
It is complete that the aging testing system is used for batch in the factory of large-scale wind electricity unit electric variable propeller system AC servo driver
Power aging is tested, and is mainly used in testing the total power run with load entirety hardware performance of variable pitch driver；The burn-in test system
The burn-in test time of variable pitch driver, the requirement, excellent for improving test effect, reducing operating personnel have been saved in the use of system
Change cost of human resources, ensure the testing progress and product quality of blower fan variable pitch driver product.
Claims (8)
1. a kind of blower variable-pitch driver aging testing system, it is characterised in that including processor and at least a set of test is single
Member, the test cell include the first motor and the second motor；First motor joins with second motor shaft, and described first
Motor is by the first tested driver control, and second motor is by the second tested driver control；The processor is used to connect
Described first tested driver and the second tested driver；
During test, the described first tested driver controls first motor operation, second quilt using speed control mode
Survey driver and second motor operation is controlled using torque control model, the second motor described in first motor drag turns
Dynamic, the DC side of the described first tested driver and the second tested driver is directly connected to；The tested driver will be adopted each
The driver temperature value of collection is uploaded to the processor, and the processor judges whether the temperature value is normal.
A kind of 2. blower variable-pitch driver aging testing system according to claim 1, it is characterised in that the tested drive
Dynamic device is also each gathered including corresponding motor temperature value, driver bus voltage value, motor speed value and motor torque value
Operational factor, and the processor is uploaded to, the processor judges whether the operational factor is normal.
A kind of 3. blower variable-pitch driver aging testing system according to claim 1, it is characterised in that first quilt
The bus positive voltage port DC+ for surveying driver is tested the bus positive voltage port DC+ of driver with described second and is connected, and described the
The bus negative voltage port DC- of one tested driver is connected with the bus negative voltage port DC- of the described second tested driver.
A kind of 4. blower variable-pitch driver aging testing system according to claim 3, it is characterised in that first quilt
Survey the back-up source positive voltage collection port BA+ and the described second tested driver of driver back-up source positive voltage collection terminal
Mouth BA+ connections, the tested driver back-up source negative voltage collection port is DC-；First divider resistance is connected in parallel on described
First, on DC- the and BA+ connecting lines of the second tested driver, the second divider resistance is connected in parallel on described first, second tested driver
BA+ and DC+ connecting lines on, described first, second tested driver gathers the voltage at the first, second divider resistance both ends
The processor, institute are uploaded to as analog backup supply voltage and respectively by the analog backup supply voltage each gathered
State processor and judge whether collection value is normal.
5. a kind of blower variable-pitch driver aging testing system according to claim 1,2,3 or 4, it is characterised in that also
Including control terminal, the control terminal connected with the breakdown judge switch of described first, second tested driver after with described first,
The Enable Pin of second tested driver is connected；The breakdown judge switch disconnects in respective drivers failure；The Enable Pin
When can not receive to induction signal, respective drivers are stopped.
6. a kind of blower variable-pitch driver aging testing system according to claim 1,2,3 or 4, it is characterised in that also
Power supply is discharged including braking, the braking release power supply connects first, second motor by air switch with rectifier bridge.
A kind of 7. blower variable-pitch driver aging testing system according to claim 1, it is characterised in that second electricity
The maximum driving torque of machine is less than the nominal drive torque of first motor.
A kind of 8. blower variable-pitch driver aging testing system according to claim 1, it is characterised in that the processor
Described first tested driver and the second tested driver are connected by serial interface cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711025858.3A CN107765124A (en) | 2017-10-26 | 2017-10-26 | A kind of blower variable-pitch driver aging testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711025858.3A CN107765124A (en) | 2017-10-26 | 2017-10-26 | A kind of blower variable-pitch driver aging testing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107765124A true CN107765124A (en) | 2018-03-06 |
Family
ID=61270831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711025858.3A Pending CN107765124A (en) | 2017-10-26 | 2017-10-26 | A kind of blower variable-pitch driver aging testing system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471422A (en) * | 2018-11-13 | 2019-03-15 | 重庆佰节成测控技术有限公司 | A kind of aging tooling control system and its detection method |
| CN110388304A (en) * | 2019-07-10 | 2019-10-29 | 许昌许继风电科技有限公司 | A kind of yaw drive Auto-Test System |
| CN111505426A (en) * | 2020-05-15 | 2020-08-07 | 许昌许继风电科技有限公司 | Master-slave dual-drive wind power pitch system testing device and testing method |
| CN113985167A (en) * | 2021-10-20 | 2022-01-28 | 天水电气传动研究所集团有限公司 | Feedback type power aging test experimental system for high-power direct-current conversion device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508484A (en) * | 2011-11-02 | 2012-06-20 | 深圳市合信自动化技术有限公司 | Aging test method and system for servo driver |
| CN106405292A (en) * | 2016-09-30 | 2017-02-15 | 许继集团有限公司 | Fan variable pitch driver automatic testing system |
-
2017
- 2017-10-26 CN CN201711025858.3A patent/CN107765124A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508484A (en) * | 2011-11-02 | 2012-06-20 | 深圳市合信自动化技术有限公司 | Aging test method and system for servo driver |
| CN106405292A (en) * | 2016-09-30 | 2017-02-15 | 许继集团有限公司 | Fan variable pitch driver automatic testing system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471422A (en) * | 2018-11-13 | 2019-03-15 | 重庆佰节成测控技术有限公司 | A kind of aging tooling control system and its detection method |
| CN109471422B (en) * | 2018-11-13 | 2021-07-13 | 重庆佰节成测控技术有限公司 | Aging tool control system and detection method thereof |
| CN110388304A (en) * | 2019-07-10 | 2019-10-29 | 许昌许继风电科技有限公司 | A kind of yaw drive Auto-Test System |
| CN111505426A (en) * | 2020-05-15 | 2020-08-07 | 许昌许继风电科技有限公司 | Master-slave dual-drive wind power pitch system testing device and testing method |
| CN111505426B (en) * | 2020-05-15 | 2022-03-22 | 许昌许继风电科技有限公司 | Master-slave dual-drive wind power pitch system testing device and testing method |
| CN113985167A (en) * | 2021-10-20 | 2022-01-28 | 天水电气传动研究所集团有限公司 | Feedback type power aging test experimental system for high-power direct-current conversion device |
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