Maintenance test device and method for variable pitch system of wind turbine generator

Abstract

The invention provides an overhaul testing device and method for a variable pitch system of a wind turbine generator, so that accurate fault detection and performance evaluation can be conveniently carried out on the variable pitch system in an off-site environment, the overhaul efficiency and accuracy of the variable pitch system are improved, the uncertainty and the repair rate in the maintenance process are reduced, and the maintenance cost is reduced. Comprising a variable-pitch motor driving damping unit, the variable-pitch motor driving damping unit comprises a variable-pitch motor, the variable-pitch motor is connected with a brake, the brake is used for simulating the load of the variable-pitch motor, a torque sensor is further arranged between the variable-pitch motor and the brake, and the torque sensor is used for detecting the loading capacity of a variable-pitch driver; the variable-pitch driving unit comprises a variable-pitch driver which is connected with the variable-pitch motor driving damping unit and is used for driving the variable-pitch motor to test; the variable-pitch battery manager is connected with the variable-pitch driver, the variable-pitch battery manager is connected with a power supply, and the variable-pitch battery manager can supply power to the variable-pitch driver; and the standby power supply is connected with the variable pitch battery manager.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine pitch control systems, and in particular to a maintenance and testing device and method for a wind turbine pitch control system. Background Art

[0002] In recent years, with the adjustment of global energy structure and increasingly severe environmental problems, wind power generation as a clean and renewable energy form has received widespread attention. In wind power generation systems, the variable pitch system is a key component to ensure the safe operation and power generation efficiency of wind turbines. It is responsible for adjusting the angle of the blades according to the change of wind speed, ensuring that the wind turbines can maintain the best working state under various working conditions, maximizing power generation efficiency and protecting the wind turbines from damage.

[0003] The stability and reliability of the pitch system performance are crucial. However, in actual operation, due to factors such as harsh working environment and heavy workload, the battery manager and motor driver in the pitch system often face various faults, which are prone to performance degradation or even failure, directly affecting the safe operation and economy of the wind turbine.

[0004] At present, the maintenance of the variable pitch battery manager and variable pitch motor drive mainly relies on experienced technicians, who carry out on-site disassembly, inspection, replacement, etc. This method is not only inefficient, but also often cannot accurately determine the cause of the fault due to the lack of systematic testing and simulation, resulting in poor maintenance quality, increased return rate, and difficulty in accurately locating the fault and efficiently repairing it. In addition, on-site maintenance also increases the labor intensity and safety risks of the staff.

[0005] In view of the problems existing in the prior art, it is of great significance to develop a maintenance test device that can simulate the actual working conditions of the variable pitch system and perform comprehensive and accurate testing and diagnosis of the battery manager and motor driver, in order to improve the reliability and maintenance efficiency of the variable pitch system of wind turbines. Summary of the invention

[0006] In response to the above problems, the present invention provides a maintenance and testing device and method for a wind turbine pitch system, so as to facilitate accurate fault detection and performance evaluation of the pitch system in an off-site environment, improve the efficiency and accuracy of pitch system maintenance, and reduce the uncertainty and rework rate in the maintenance process.

[0007] The technical solution is as follows: a maintenance and testing device for a wind turbine pitch system, characterized in that it includes:

[0008] A pitch motor driven damping unit, wherein the pitch motor driven damping unit comprises a pitch motor, wherein the brake is connected to the pitch motor via a coupling, wherein the brake is used to simulate the load of the pitch motor, and wherein a torque sensor is further provided between the pitch motor and the brake, wherein the torque sensor is used to detect the load capacity of the pitch drive;

[0009] The pitch drive unit comprises:

[0010] A pitch drive, the pitch drive being connected to the pitch motor drive damping unit and used for driving the pitch motor for testing;

[0011] A pitch battery manager, wherein the pitch battery manager is connected to the pitch drive, the pitch battery manager is connected to a power source, the pitch battery manager can supply power to the pitch drive, and the pitch battery manager communicates with the pitch drive via a CAN bus connection;

[0012] A backup power supply, the backup power supply being connected to the pitch battery manager;

[0013] Furthermore, it also includes a test workbench, and the variable pitch drive unit and the variable pitch motor drive damping unit are respectively installed on the test workbench.

[0014] Furthermore, the test workbench includes a multi-layer main frame, a platform bottom plate is provided on the lower layer of the multi-layer main frame, a storage cabinet is also provided on one side of the lower layer of the multi-layer main frame, the variable pitch motor drive damping unit is installed on the platform bottom plate, a mounting back plate is provided at the upper end of the double-layer main frame, the variable pitch drive unit is installed on the mounting back plate, a wire management groove is also provided on the mounting back plate, and protective covers are respectively provided on the mounting back plate corresponding to the variable pitch battery manager and the variable pitch drive, and heat dissipation holes are evenly distributed on the protective covers.

[0015] Furthermore, the variable pitch motor is horizontally mounted on the platform base plate through a motor bracket, the torque sensor is mounted on the platform base plate through a sensor support frame, the brake is arranged on a brake support frame, the variable pitch motor, the torque sensor and the brake are mounted at the same height, and the brake adopts a magnetic powder brake.

[0016] Furthermore, it also includes a controller, which is connected to the brake and the torque sensor, and can drive the brake and the torque sensor and record the torque data detected by the torque sensor.

[0017] Furthermore, the power supply includes a three-phase power supply and a 24V power supply. The three-phase power supply is connected to the air switch Q1 and then to the power input end of the pitch battery manager. The backup power supply is connected to the switch Q2 and then to the power input end of the pitch battery manager. A switch Q3 is arranged between the 24V power supply and the mains. The 24V power supply is connected to the switch Q4 and then to the power input end of the pitch battery manager. The power output end of the pitch battery manager is connected to the power input end of the pitch drive. The backup power supply includes several batteries connected in series, and the batteries are also connected to the battery detection port of the pitch battery manager.

[0018] Furthermore, a fuse is connected between the power output end of the pitch battery manager and the power input end of the pitch drive. The pitch battery manager also includes a 24V output port, which is connected to the EFC emergency pitch port of the pitch drive and the pitch battery manager. The axle box temperature measurement port and the hub central control box temperature port of the pitch battery manager are respectively connected to sensor resistors for simulating the working conditions of the pitch battery manager.

[0019] Furthermore, the three-phase output port of the pitch drive is connected to the pitch motor, the motor encoder port and the blade encoder port of the pitch drive are respectively used to connect the encoder and the blade encoder of the pitch motor, the brake port of the pitch drive is used to connect the brake of the pitch motor, and the motor temperature detection port of the pitch drive is used to connect the motor temperature detection port of the pitch motor.

[0020] Furthermore, the 24V output port of the pitch battery manager is respectively connected to one end of the controlled switches S1, S2, S3, and S4, and the controlled switches S1, S2, S3, and S4 are connected to the input port of the pitch drive. The controlled switches S1, S2, S3, and S4 can be controlled to close and input signals into the pitch drive to simulate the input state of the pitch drive.

[0021] A maintenance and testing method for a wind turbine pitch system comprises the following steps:

[0022] Connecting the pitch motor to the pitch drive, connecting the pitch drive to the pitch drive, connecting the pitch battery manager to a power source, the pitch battery manager supplies power to the pitch drive, and the pitch drive drives the pitch motor to work;

[0023] Connect the pitch motor to the brake and apply the brake to simulate the load of the pitch motor.

[0024] A torque sensor is arranged between the pitch motor and the brake, and the torque data detected by the torque sensor reflects the load capacity of the pitch drive;

[0025] The variable pitch battery manager is connected to a backup power supply, and power is supplied by the backup power supply, and the load capacity of the variable pitch drive when the backup power supply is used is detected.

[0026] The maintenance and testing device and method for the wind turbine pitch system of the present invention are equipped with an electrical circuit that simulates the entire pitch system and a maintenance and testing device that can simulate the actual working conditions of the pitch device, so as to facilitate accurate fault detection and performance evaluation of the pitch battery manager and the pitch motor driver in the pitch system in an off-site environment. The data collected by the torque sensor can more quickly and accurately reflect the actual working conditions of the driver, the pitch battery manager and the pitch motor, improve the efficiency and accuracy of the maintenance of the pitch battery manager and the pitch motor driver, reduce the uncertainty and rework rate in the maintenance process, and reduce the work intensity and safety risks of on-site operators;

[0027] By setting up a test workbench, the test platform can be miniaturized, which makes it convenient to conduct tests in different work sites and to change the work site for testing, thus improving the flexibility and applicability of the platform. The reasonable layout of the variable pitch drive unit and the variable pitch motor drive damping unit on the test workbench makes the platform design more compact and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a system block diagram of a maintenance and testing device for a wind turbine pitch control system in an embodiment;

[0029] Figure 2 A system composition block diagram of a maintenance and testing device for a wind turbine pitch control system in one embodiment;

[0030] Figure 3 A system composition block diagram of a maintenance and testing device for a wind turbine pitch control system in another embodiment;

[0031] Figure 4 A three-dimensional diagram of a maintenance and testing device for a wind turbine pitch system in an embodiment from a first viewing angle;

[0032] Figure 5 A stereoscopic diagram of a maintenance and testing device for a wind turbine pitch control system in an embodiment from a second viewing angle;

[0033] Figure 6 A circuit diagram of a power supply part of a maintenance and testing device for a wind turbine pitch control system in an embodiment;

[0034] Figure 7 A circuit diagram of a pitch battery manager for a maintenance and testing device for a wind turbine pitch system in an embodiment;

[0035] Figure 8A circuit diagram of a pitch drive of a maintenance and testing device for a wind turbine pitch system in an embodiment;

[0036] Fig. 9 is a circuit diagram of a maintenance and testing device for a wind turbine pitch control system in an embodiment;

[0037] Fig.10 is a schematic diagram of a switch simulating an input state of a pitch drive in an embodiment;

[0038] Fig.11 Schematic diagram of the steps of the maintenance and testing method for the variable pitch system of a wind turbine in the embodiment. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments, and people familiar with this technology can understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0040] See Figure 1 , Figure 2 , a maintenance and testing device for a wind turbine pitch system, comprising:

[0041] A pitch motor driven damping unit 100, wherein the pitch motor driven damping unit 100 comprises a pitch motor 101, a brake 102 connected to the pitch motor 101 via a coupling, and a torque sensor 103 is further provided between the pitch motor 101 and the brake 102, wherein the brake 102 is used to simulate the load of the pitch motor, and the torque sensor is used to detect the load capacity of the pitch drive;

[0042] The pitch drive unit 200 includes:

[0043] A pitch driver 201, which is connected to the pitch motor drive damping unit 100 and is used to drive the pitch motor 101 for testing;

[0044] Pitch battery manager 202, pitch battery manager 202 is connected to pitch driver 201, pitch battery manager 202 is connected to a power source, pitch battery manager 202 can supply power to pitch driver 201, pitch battery manager 202 and pitch driver 201 communicate via a CAN bus connection, and pitch driver 201 can drive pitch motor 101 and brake 102 for testing;

[0045] The backup power supply 203 is connected to the pitch battery manager 202 and is used to maintain the operation of the system in the event of a power grid failure or emergency. The backup power supply 203 is also provided to restore the actual situation of the wind turbine pitch system.

[0046] The inspection and testing device for the wind turbine pitch system in the embodiment can simulate the actual working conditions of the pitch device to facilitate accurate fault detection and performance evaluation of the pitch battery manager and the pitch motor driver in an off-site environment, which can improve the efficiency and accuracy of the inspection and maintenance of the pitch battery manager and the pitch motor driver, reduce the uncertainty and return rate in the maintenance process, ensure that the repaired equipment can operate stably in the wind turbine, and help to establish a complete pitch system maintenance system and improve the overall operation and maintenance level; the inspection and testing device for the wind turbine pitch system in the embodiment will greatly reduce the workload of on-site operators, improve the judgment of the working condition of the drive, support direct detection on the platform without the need to install it on the wind turbine for testing, and can perform comprehensive diagnosis and analysis on the performance of the drive, thereby improving the troubleshooting efficiency of maintenance personnel.

[0047] See Figure 4 , 5. In one implementation, a test bench 300 is also provided for the maintenance and testing device for the wind turbine pitch system, and the pitch drive unit 100 and the pitch motor drive damping unit 200 are respectively installed on the test bench 300.

[0048] In one implementation, the test bench includes a multi-layer main frame 301, which is provided with two layers. A platform bottom plate 302 is also provided on the lower platform of the multi-layer main frame 301. The platform bottom plate 302 can be a wooden flat plate. The variable pitch motor drive damping unit 100 is installed on the platform bottom plate 302; the variable pitch motor 101 is horizontally installed on the platform bottom plate 302 through a motor bracket 308, the torque sensor 103 is installed on the platform bottom plate 302 through a sensor support frame 309, and the brake 102 is arranged on a brake support frame 307, so as to realize The pitch motor, torque sensor and brake are installed at the same height, and the brake support frame 307 and the motor bracket 308 fixing bracket can adopt an integrated design or a separate design; the brake adopts a magnetic powder brake, and the pitch motor drive damping unit can be used to test the load capacity of the driver and simulate the driver overcurrent fault. The pitch motor drive damping unit in the embodiment has excellent dynamic balancing performance, and the pitch motor can test the actual load capacity at high speed, completing the performance test of the pitch motor and driver, to ensure that the tested equipment can operate stably on the wind turbine.

[0049] A storage cabinet 303 is also provided on one side of the lower rack of the multi-layer main frame 301 for placing commonly used tools, maintenance consumables and drawing-related materials. The multi-layer main frame 301 can be easily moved and can also be designed with casters; the setting of the test workbench realizes the miniaturization and portability of the test platform, which is convenient for testing work in different work sites.

[0050] The upper platform of the double-layer main frame 301 can generally be provided with a wooden flat plate, and the surface is treated with anti-static treatment. A mounting backboard 304 is provided at the upper end of the double-layer main frame 301, and the variable pitch drive unit 100 is installed on the mounting backboard 304. The mounting backboard 304 adopts a wooden panel to increase the insulation performance and perform fireproof and anti-static treatment. Part of the space on the backboard of the mounting backboard 304 is reserved for the expansion of the later power distribution device, and a wire management groove 310 is also provided on the mounting backboard 304.

[0051] In one embodiment, protective covers 305 are provided on the mounting back plate 304 respectively corresponding to the pitch battery manager 202 and the pitch driver 201 , and heat dissipation holes 306 are evenly distributed on the protective covers 305 .

[0052] See Figure 3 In one implementation, it also includes a controller 104, which is connected to the brake 102 and the torque sensor 103. The controller 104 can drive the brake 102 and the torque sensor 103, and record the torque data detected by the torque sensor 103. The controller 104 in the embodiment can be a PLC device or an industrial PC.

[0053] The data collected by the torque sensor can reflect the actual working conditions of the drive, pitch battery manager and pitch motor more quickly and accurately, providing comprehensive and effective data support for the subsequent maintenance of the equipment, reducing the probability of rework, and conducting a comprehensive diagnosis and analysis of the drive's performance. The controller's display panel can directly pop up faults, improving the troubleshooting efficiency of maintenance personnel.

[0054] In the embodiment, after the pitch motor drive damping unit 100 and the pitch drive unit 200 are fixed, the motor drive damping unit 100 and the pitch drive unit 200 are also electrically connected, such as Figure 6 As shown, the power supply includes a three-phase power supply and a 24V power supply. The three-phase power supply is connected to the air switch Q1 and then to the power input terminals X18.6, X18.5, and X18.4 of the pitch battery manager. The backup power supply is connected to the switch Q2 and then to the power input terminals X19.3 and X19.4 of the pitch battery manager. A switch Q3 is provided between the 24V power supply and the mains. The 24V power supply is connected to the switch Q4 and then to the power input terminal of the pitch battery manager. The power output terminals X19.5 and X19.6 of the pitch battery manager are connected to the power input terminals X8:3 and X8:2 of the pitch drive.

[0055] See Fig.10 In the embodiment, the backup power supply includes a plurality of batteries 1, 2, 3, 4, 6, and 6 connected in series, and the batteries 1, 2, 3, 4, 6, and 6 are also connected to the battery detection port X17 of the pitch battery manager.

[0056] See Figure 7 , 8 In the embodiment, precise control and signal acquisition of the pitch drive and the battery manager can be achieved. The X11 port of the pitch battery manager is connected to the X1 port of the pitch drive through a CAN bus. Smooth data exchange is achieved through CAN communication to improve the accuracy of fault simulation. A fuse F1 is connected between the power output terminal X19.6 of the pitch battery manager and the power input terminal X8:2 of the pitch drive. The pitch battery manager also includes a 24V output port, one of which, X20:4, is connected to the EFC emergency feathering port X2:3 of the pitch drive and the EFC emergency feathering port X13:10 of the pitch battery manager. The axle box temperature measurement port X15:1, X15:2 of the pitch battery manager and the wheel hub central control box temperature port are respectively connected to sensor resistors R1 and R2 for simulating the working conditions of the pitch battery manager.

[0057] See Figure 7 , 8 The three-phase output ports X9:1, X9:2, and X9:3 of the pitch drive are connected to the pitch motor. The motor encoder port X5 and the blade encoder port X3 of the pitch drive are used to connect the encoder and the blade encoder of the pitch motor respectively. The brake ports X6:3 and X6:4 of the pitch drive are used to connect the brake of the pitch motor. The motor temperature detection ports X6:1 and X6:2 of the pitch drive are used to connect the motor temperature detection ports of the pitch motor, which are used to restore the real connection status of the pitch motor and the pitch drive.

[0058] See Fig. 9 The 24V output ports of the pitch battery manager are respectively connected to one end of the controlled switches S1, S2, S3, and S4, and the controlled switches S1, S2, S3, and S4 are connected to the input ports of the pitch drive. The controlled switches S1, S2, S3, and S4 are respectively used to simulate the input states of the pitch drive. These input ports can simulate the states of various fault inputs of the wind turbine, and fully present the actual fault points in the pitch system.

[0059] The maintenance and testing device for the wind turbine pitch system in the embodiment can accurately simulate the load capacity and overcurrent faults of the driver, thereby improving the accuracy of fault detection. The electrical circuit is reasonably designed and can fully access the functions of the driver and the pitch battery manager. The tested equipment will not miss any test and all actual working data will be collected. The actual fault points in the pitch system can be fully presented, ensuring that the test is not missed and improving the reliability of the test results.

[0060] See Fig.11 In an embodiment of the present invention, a maintenance and testing method for a wind turbine pitch system is also provided, comprising the following steps:

[0061] Step 1: Connect the pitch motor to the pitch drive, connect the pitch drive to the pitch drive, connect the pitch battery manager to the power supply, the pitch battery manager supplies power to the pitch drive, and the pitch drive drives the pitch motor to work;

[0062] Step 2: Connect the pitch motor to the brake and simulate the load of the pitch motor by braking the brake;

[0063] Step 3: A torque sensor is set between the pitch motor and the brake, and the torque data detected by the torque sensor reflects the load capacity of the pitch drive;

[0064] Step 4: Connect the variable pitch battery manager to the backup power supply, and test the load capacity of the variable pitch drive when the backup power supply is used.

[0065] By adopting the method in the embodiment, most of the testing and maintenance work can be completed in a laboratory environment, reducing the need for on-site operations, reducing the safety risks of workers, and being able to comprehensively monitor the operating status of the variable pitch system, timely discover potential problems, and avoid the occurrence of failures.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0067] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A maintenance and testing device for a wind turbine pitch system, characterized in that: include: A pitch motor driven damping unit, wherein the pitch motor driven damping unit comprises a pitch motor, wherein the brake is connected to the pitch motor via a coupling, wherein the brake is used to simulate the load of the pitch motor, and wherein a torque sensor is further provided between the pitch motor and the brake, wherein the torque sensor is used to detect the load capacity of the pitch drive; The pitch drive unit comprises: A pitch drive, the pitch drive being connected to the pitch motor drive damping unit and used for driving the pitch motor for testing; A pitch battery manager, wherein the pitch battery manager is connected to the pitch drive, the pitch battery manager is connected to a power source, the pitch battery manager can supply power to the pitch drive, and the pitch battery manager communicates with the pitch drive via a CAN bus connection; A backup power supply is connected to the pitch battery manager.

2. The maintenance and testing device for a wind turbine pitch system according to claim 1, characterized in that: It also includes a test workbench, on which the pitch drive unit and the pitch motor drive damping unit are respectively mounted.

3. The maintenance and testing device for a wind turbine pitch system according to claim 2, characterized in that: The test workbench includes a multi-layer main frame, a platform bottom plate is arranged on the lower frame of the multi-layer main frame, a storage cabinet is also arranged on one side of the lower frame of the multi-layer main frame, the variable pitch motor drive damping unit is installed on the platform bottom plate, a mounting back plate is arranged on the upper end of the double-layer main frame, the variable pitch drive unit is installed on the mounting back plate, a wire management groove is also arranged on the mounting back plate, and protective covers are respectively arranged on the mounting back plate corresponding to the variable pitch battery manager and the variable pitch drive, and heat dissipation holes are evenly distributed on the protective covers.

4. The maintenance and testing device for a wind turbine pitch system according to claim 2, characterized in that: The variable pitch motor is horizontally mounted on the platform bottom plate through a motor bracket, the torque sensor is mounted on the platform bottom plate through a sensor support frame, the brake is arranged on a brake support frame, the variable pitch motor, the torque sensor and the brake are mounted at the same height, and the brake adopts a magnetic powder brake.

5. The maintenance and testing device for a wind turbine pitch system according to claim 2, characterized in that: The invention also comprises a controller, which is connected with the brake and the torque sensor, and can drive the brake and the torque sensor and record the torque data detected by the torque sensor.

6. The maintenance and testing device for a wind turbine pitch system according to claim 1, characterized in that: The power supply includes a three-phase power supply and a 24V power supply. The three-phase power supply is connected to the air switch Q1 and then connected to the power input end of the pitch battery manager. The backup power supply is connected to the switch Q2 and then connected to the power input end of the pitch battery manager. A switch Q3 is provided between the 24V power supply and the mains. The 24V power supply is connected to the switch Q4 and then connected to the power input end of the pitch battery manager. The power output end of the pitch battery manager is connected to the power input end of the pitch drive. The backup power supply includes a plurality of batteries connected in series, and the batteries are also connected to the battery detection port of the pitch battery manager.

7. A maintenance and testing device for a wind turbine pitch system according to claim 6, characterized in that: A fuse is connected between the power output end of the pitch battery manager and the power input end of the pitch drive. The pitch battery manager also includes a 24V output port, which is connected to the EFC emergency pitch port of the pitch drive and the pitch battery manager. The axle box temperature measurement port and the wheel hub central control box temperature port of the pitch battery manager are respectively connected to sensor resistors for simulating the working conditions of the pitch battery manager.

8. The maintenance and testing device for a wind turbine pitch system according to claim 7, characterized in that: The three-phase output port of the pitch drive is connected to the pitch motor, the motor encoder port and the blade encoder port of the pitch drive are respectively used to connect the encoder and the blade encoder of the pitch motor, the brake port of the pitch drive is used to connect the brake of the pitch motor, and the motor temperature detection port of the pitch drive is used to connect the motor temperature detection port of the pitch motor.

9. The maintenance and testing device for a wind turbine pitch system according to claim 7, characterized in that: The 24V output port of the pitch battery manager is respectively connected to one end of the controlled switches S1, S2, S3, and S4, and the controlled switches S1, S2, S3, and S4 are connected to the input port of the pitch drive. The controlled switches S1, S2, S3, and S4 can be controlled to close and input signals into the pitch drive to simulate the input state of the pitch drive.

10. A maintenance and testing method for a wind turbine pitch system, characterized in that: The following steps are involved: Connecting the pitch motor to the pitch drive, connecting the pitch drive to the pitch drive, connecting the pitch battery manager to a power source, the pitch battery manager supplies power to the pitch drive, and the pitch drive drives the pitch motor to work; Connect the pitch motor to the brake and apply the brake to simulate the load of the pitch motor. A torque sensor is arranged between the pitch motor and the brake, and the torque data detected by the torque sensor reflects the load capacity of the pitch drive; The variable pitch battery manager is connected to a backup power supply, and power is supplied by the backup power supply, and the load capacity of the variable pitch drive when the backup power supply is used is detected.

Images