A control system topology for a variable pitch test bench

Abstract

The present invention discloses a control system topology structure of a variable pitch test bench, including a multi-axis use control module, multiple single-axis use control modules, multiple test modules and a network cable, a variable pitch system corresponds to a single-axis use control module and a test module, the multi-axis use control module is plugged with multiple test modules respectively through the network cable, and each single-axis use control module is plugged with a corresponding test module through the network cable. In the present invention, when the functional verification of the entire variable pitch system is required, three loading motors are used in combination; when the internal components of the variable pitch system need to be tested, a single variable pitch control cabinet and a single variable pitch motor can be used, and a single loading motor can be used for loading; the present invention realizes the rapid and flexible switching of synchronous loading of three loading motors and separate loading of three loading motors of the variable pitch test bench.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical equipment testing, and in particular relates to a control system topology structure of a variable pitch test bench. Background Art

[0002] At present, the variable pitch system of wind turbines not only serves as a wind energy capture device for wind turbines to convert wind energy into mechanical energy, but also as an aerodynamic brake device for wind turbines. When the variable pitch system or the unit fails, the variable pitch system quickly straightens the propeller, unloads the aerodynamic torque, and the unit shuts down safely. Therefore, it is necessary to conduct sufficient functional performance verification during prototype development to ensure the reliability and stability of the product. Although the traditional variable pitch system electric loading test system can simulate actual working conditions and realize simulation testing of the load capacity of wind turbines, it is necessary to load three variable pitch motors to fully verify the functional performance of the variable pitch system. At the same time, during the prototype development stage of the variable pitch system, it is necessary to test the components in the cabinet. At this time, only one shaft cabinet of the variable pitch system needs to be used for testing, so only one loading motor is needed.

[0003] In the prior art, there are single-motor loading platforms and three-motor loading platforms. Among them, the single-motor loading platform consists of a control cabinet with a control system, a loading driver, an energy feedback unit, a loading motor, a torque measuring instrument and a motor base. The three-motor loading platform consists of a control cabinet with a control system, three loading drivers, an energy feedback unit, three loading motors, three torque measuring instruments and three motor bases.

[0004] For a single-motor loading platform, only a single variable pitch motor can be loaded, and it cannot meet the simultaneous loading of three motors in a complete variable pitch system. For a three-motor loading platform, it can meet the simultaneous loading of three motors in a complete variable pitch system, but because a set of control systems is used, when a single variable pitch motor loading test is required, the other two loading motors are idle, which is not conducive to the rational use of test resources. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a control system topology structure of a variable pitch test bench.

[0006] A variable pitch test bench control system topology structure includes a multi-axis use control module, multiple single-axis use control modules, multiple test modules and a network cable. One variable pitch system corresponds to one single-axis use control module and one test module. The multi-axis use control module is respectively plugged with the multiple test modules through the network cable, and each single-axis use control module is plugged with a corresponding test module through the network cable.

[0007] The above technical solution is preferred, wherein the multi-axis control module includes a three-axis PLC host, a first expansion module and a second expansion module, the test module includes test module one, test module two and test module three, the second expansion module is plugged with the test module one through the network cable C1, and the first expansion module is plugged with the test module two and the test module three respectively through the network cable C3 and the network cable C5.

[0008] The above technical solution is preferred, wherein the single-axis control module includes a single-axis PLC host for axis one, an axis one extension module, a single-axis PLC host for axis two, an axis two extension module, a single-axis PLC host for axis three and an axis three extension module, the axis one extension module is plugged with the test module one via the network cable C2, the axis two extension module is plugged with the test module two via the network cable C4, and the axis three extension module is plugged with the test module three via the network cable C6.

[0009] The above technical solution is preferred, in which the three-axis PLC host and the single-axis PLC host are electrically connected to switch one, and switch one is electrically connected to the test bench computer loaded with upper software, the test computer pitch upper software and the PLC host for the pitch control of the pitch system one under test, and the PLC host for the pitch control under test is electrically connected to the pitch system one.

[0010] The above technical solution is preferred, in which the single-axis axis 2 uses a PLC host to be electrically connected to switch 2, and the switch 2 is respectively electrically connected to the test bench computer to load the upper software, the test computer pitch upper software and the PLC host for the tested pitch control of the pitch system 2, and the PLC host for the tested pitch control is electrically connected to the pitch system 2.

[0011] The above technical solution is preferred, in which the single axis of axis three uses a PLC host to be electrically connected to switch three, and switch three is respectively electrically connected to the upper software loaded by the test bench computer, the test computer pitch upper software and the PLC host for the tested pitch control of pitch system three, and the PLC host for the tested pitch control is electrically connected to pitch system three.

[0012] The above technical solution is preferred, wherein the test module one includes a third expansion module, a DI input module, a DO output module, a PT100 AI input module, a torque and speed AI input module and an RS485 module, and the third expansion module is selectively connected to the second expansion module and the axis one expansion module through the network cable C1 and the network cable C2 respectively.

[0013] The above technical solution is preferred, wherein the test module 2 includes a third expansion module, a DI input module, a DO output module, a PT100 AI input module, a torque and speed AI input module and an RS485 module, and the third expansion module is selectively connected to the second expansion module and the axis two expansion module through the network cable C3 and the network cable C4 respectively.

[0014] The above technical solution is preferred, wherein the test module three includes a third expansion module, a DI input module, a DO output module, a PT100 AI input module, a torque and speed AI input module and an RS485 module, and the third expansion module is selectively connected to the second expansion module and the axis three expansion module through the network cable C5 and the network cable C6 respectively.

[0015] The above technical scheme preferably also includes a variable pitch system incoming line circuit, wherein the variable pitch system incoming line circuit includes circuit breaker Q0, circuit breaker Q1, circuit breaker Q1', circuit breaker Q4, circuit breaker Q0', circuit breaker Q2, circuit breaker Q5, circuit breaker Q0", circuit breaker Q3 and circuit breaker Q6. When three motors, axis one, axis two and axis three, are used for loading or the axis one motor is loaded alone, the 400V incoming line of the variable pitch system is connected to circuit breaker Q1. When the incoming line grid adaptability test is required, the 400V incoming line of the variable pitch system is connected to circuit breaker Q1'. When the axis two or axis three motor is required to be used alone, the 400V incoming line of the variable pitch system is connected to circuit breaker Q2 or circuit breaker Q3.

[0016] The advantages and positive effects of the present invention are as follows: the present invention provides a control system topology structure of a pitch test bench. When the functionality of the entire pitch system needs to be verified, the three loading motors are used in combination; when it is necessary to test the internal components of the pitch system, a single pitch control cabinet and a single pitch motor can be used, and a single loading motor can be used for loading; the present invention realizes fast and flexible switching between synchronous loading of the three loading motors of the pitch test bench and individual loading of the three loading motors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a control loop schematic diagram of the topological structure of the control system of the variable pitch test bench provided by one embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of an electrical circuit of a topological structure of a control system of a variable pitch test bench provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0023] This embodiment provides a control system topology structure for a variable pitch test bench, especially for situations involving frequent switching between three motor loading tests and single motor loading tests of a complete variable pitch system, and situations where the loading test bench needs to be moved for use. Figure 1 and 2 As shown, it includes a multi-axis control module, multiple single-axis control modules, multiple test modules and a network cable. One variable pitch system corresponds to one single-axis control module and one test module. The multi-axis control module is respectively connected to the multiple test modules through the network cable, and each single-axis control module is connected to a corresponding test module through the network cable.

[0024] Specifically, the multi-axis control module includes a three-axis PLC host, a first expansion module and a second expansion module, the test module includes test module one, test module two and test module three, the second expansion module is plugged with the test module one through the network cable C1, and the first expansion module is plugged with the test module two and the test module three through the network cable C3 and the network cable C5 respectively.

[0025] Furthermore, the single-axis control module includes a single-axis PLC host for axis one, an axis one extension module, a single-axis PLC host for axis two, an axis two extension module, a single-axis PLC host for axis three and an axis three extension module. The axis one extension module is plugged into the test module one via the network cable C2, the axis two extension module is plugged into the test module two via the network cable C4, and the axis three extension module is plugged into the test module three via the network cable C6.

[0026] Furthermore, the three-axis PLC host and the single-axis PLC host of axis one are electrically connected to switch one, and switch one is electrically connected to the PLC host for tested pitch control of the test bench computer loaded with upper software, the test computer pitch upper software and pitch system one, and the PLC host for tested pitch control is electrically connected to the pitch system one.

[0027] Furthermore, the single axis of axis 2 uses a PLC host to be electrically connected to switch 2, and switch 2 is respectively electrically connected to the test bench computer loading upper software, the test computer pitch upper software and the PLC host for the tested pitch control of pitch system 2, and the PLC host for the tested pitch control is electrically connected to pitch system 2.

[0028] Furthermore, the single axis of axis three uses a PLC host to be electrically connected to switch three, and switch three is respectively electrically connected to the test bench computer loading upper software, the test computer pitch upper software and the PLC host for the tested pitch control of pitch system three, and the PLC host for the tested pitch control is electrically connected to pitch system three.

[0029] Furthermore, the test module one includes a third expansion module, a DI input module, a DO output module, a PT100AI input module, a torque and speed AI input module and an RS485 module, and the third expansion module is selectively connected to the second expansion module and the axis one expansion module through the network cable C1 and the network cable C2 respectively.

[0030] Furthermore, the test module 2 includes a third expansion module, a DI input module, a DO output module, a PT100AI input module, a torque and speed AI input module and an RS485 module. The third expansion module is selectively connected to the second expansion module and the axis two expansion module through the network cable C3 and the network cable C4 respectively.

[0031] Furthermore, the test module three includes a third expansion module, a DI input module, a DO output module, a PT100AI input module, a torque and speed AI input module and an RS485 module. The third expansion module is selectively connected to the second expansion module and the axis three expansion module through the network cable C5 and the network cable C6 respectively.

[0032] Furthermore, it also includes a variable pitch system incoming line circuit, which includes circuit breaker Q0, circuit breaker Q1, circuit breaker Q1', circuit breaker Q4, circuit breaker Q0', circuit breaker Q2, circuit breaker Q5, circuit breaker Q0", circuit breaker Q3 and circuit breaker Q6. When three motors, axis one, axis two and axis three, are used for loading or the axis one motor is loaded alone, the 400V incoming line of the variable pitch system is connected to circuit breaker Q1. When the incoming line grid adaptability test is required, the 400V incoming line of the variable pitch system is connected to circuit breaker Q1'. When the axis two or axis three motor is required to be used alone, the 400V incoming line of the variable pitch system is connected to circuit breaker Q2 or circuit breaker Q3.

[0033] Optionally, the three axes use PLC host A0, the axis one uses PLC host A1, the axis two uses PLC host A2, and the axis three uses PLC host A3, all of which use Beckhoff products, such as the CX5020 model. Each module adopts a guide rail structure and can be quickly plugged in. The bus is EtherCAT. A total of 4 PLC hosts are configured, and matching control programs are written in each. The first expansion module and the second expansion module are EtherCAT expansion modules EK1122 and EtherCAT expansion modules EK1110. The axis one expansion module, the axis two expansion module, and the axis three expansion module are EtherCAT expansion modules EK1110. The third extension module, DI input module, DO output module, PT100 AI input module, torque and speed AI input module and RS485 module are EtherCAT extension module EK1100, DI input module EL1008, DO output module EL2008, PT100 AI input module EL3204, torque and speed AI input module EL3122 and RS485 module EL6021 respectively.

[0034] Structurally, the entire test platform is divided into three distribution cabinets, three motor cast iron platforms and AC Source. The axis one distribution box contains molded case circuit breaker Q0, molded case circuit breaker Q1, molded case circuit breaker Q1', molded case circuit breaker Q4, inverter one, test module one, three-axis PLC host CX5020 (A0), EtherCAT expansion module EK1122, EtherCAT expansion module EK1110, axis one single axis PLC host CX5020 (A1), EtherCAT expansion module EK1110, EtherCAT expansion module EK1100, DI input module EL1008, DO output module EL2008, PT100 AI input module EL3204, torque speed AI input module EL3122, RS485 module EL6021, switch, PLC host for tested variable pitch control and auxiliary power distribution circuit.

[0035] The axis two distribution box contains molded case circuit breaker Q0', molded case circuit breaker Q2, molded case circuit breaker Q5, inverter two, test module two, PLC host CX5020 (A2) for axis two, EtherCAT expansion module EK1110, EtherCAT expansion module EK1100, DI input module EL1008, DO output module EL2008, PT100 AI input module EL3204, torque and speed AI input module EL3122, RS485 module EL6021, switch, PLC host for tested variable pitch control and auxiliary distribution circuit.

[0036] The axis three distribution box contains molded case circuit breaker Q0", molded case circuit breaker Q3, molded case circuit breaker Q6, inverter three, test module three, PLC host CX5020 (A3) for axis three, EtherCAT expansion module EK1110, EtherCAT expansion module EK1100, DI input module EL1008, DO output module EL2008, PT100 AI input module EL3204, torque speed AI input module EL3122, RS485 module EL6021, switch, PLC host for tested variable pitch control and auxiliary distribution circuit.

[0037] The motor cast iron platform includes a base, a loading motor, a torque measuring instrument, a motor mounting bracket and a coupling.

[0038] The PLC uses Beckhoff products. Each module adopts a guide rail structure and can be quickly plugged in. The bus is EtherCAT. A total of 4 PLC hosts are configured, and matching control programs are written separately. They are plugged into the EtherCAT expansion modules EL1122 / EL1110 / EL1100 through network cables as needed to achieve fast switching of control modules. When three motors need to be loaded and used at the same time, insert network cables C1, C3, and C5 into the corresponding positions, and use the three-axis PLC host A0 for platform control. At this time, the EtherCAT bus is radial, which can ensure the synchronous response of the three-axis control module; when a single motor needs to be used alone, insert network cables C2, C4, or C6 into the corresponding positions, use PLC host A1 for axis one, PLC host A2 for axis two, or PLC host A3 for axis three.

[0039] When three motors are used for loading or axis 1 is loaded alone, the 400V incoming line of the variable pitch system is connected to Q1. When the incoming line grid adaptability test is required, the 400V incoming line of the variable pitch system is connected to Q1'. When axis 2 and axis 3 motors need to be used alone, the 400V incoming line of the variable pitch system is connected to Q2 or Q3.

[0040] Each distribution box is equipped with a switch, and the PLC that controls the pitch control system can also be connected to the switch. In this way, two computers can be used for pitch control and loading control respectively, or one computer can be used for pitch control and loading control.

[0041] If a motor needs to be moved to another location for testing, the incoming and outgoing lines of a distribution cabinet or a motor cast iron platform can be removed and reconnected after arriving at the designated location. These connections are all connected using quick connectors and can be quickly disassembled and restored.

[0042] The advantages and positive effects of the present invention are as follows: the present invention provides a control system topology structure of a pitch test bench. When the functionality of the entire pitch system needs to be verified, the three loading motors are used in combination; when it is necessary to test the internal components of the pitch system, a single pitch control cabinet and a single pitch motor can be used, and a single loading motor can be used for loading; the present invention realizes fast and flexible switching between synchronous loading of the three loading motors of the pitch test bench and individual loading of the three loading motors.

[0043] The electrical circuit and control circuit of the distribution box corresponding to the three loading motors of the variable pitch test bench are completely independent, and the control bus switches quickly. When the three loading motors are used together, a whole set of variable pitch systems can be loaded to ensure the synchronization of the torque applied by the loading motors; when the three loading motors are used separately, in the same space, the electrical circuit and control circuit are independent, which can realize independent control by multiple groups of personnel and test them separately, which is safe and reliable. It can not only realize the synchronous control of the three loading motors and realize the test of a whole set of variable pitch systems, but also avoid that only one test can be carried out on the three loading motor test platforms at the same time, thereby improving the equipment utilization rate and test progress. The cast iron platform of a single loading motor can be moved in a short time to realize the flexible use of the test bench. When the loading platform is far away from the environmental test chamber, the cast iron platform of the loading motor is placed in the environmental test chamber, and the corresponding loading distribution cabinet is placed outside the environmental test chamber to realize the high temperature load aging operation of the variable pitch system. The entire variable pitch test bench can be used separately in different spaces. If the distribution box is replaced with an outdoor type with a higher protection level, it can be used in an open air environment.

[0044] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A control system topology structure of a variable pitch test bench, characterized in that: It includes a multi-axis use control module, multiple single-axis use control modules, multiple test modules and a network cable, one pitch control system corresponds to one single-axis use control module and one test module, the multi-axis use control module is respectively plugged with the multiple test modules through the network cable, and each single-axis use control module is plugged with a corresponding test module through the network cable; It also includes a pitch system incoming line circuit, which includes circuit breaker Q0, circuit breaker Q1, circuit breaker Q1', circuit breaker Q4, circuit breaker Q0', circuit breaker Q2, circuit breaker Q5, circuit breaker Q0", circuit breaker Q3 and circuit breaker Q6. When three motors, axis one, axis two and axis three, are used for loading or axis one motor is loaded alone, the 400V incoming line of the pitch system is connected to circuit breaker Q1. When the incoming line grid adaptability test is required, the 400V incoming line of the pitch system is connected to circuit breaker Q1'. When the axis two or axis three motor is required to be used alone, the 400V incoming line of the pitch system is connected to circuit breaker Q2 or circuit breaker Q3.

2. The control system topology of the variable pitch test bench according to claim 1 is characterized in that: The multi-axis control module includes a three-axis PLC host, a first expansion module and a second expansion module, the test module includes test module one, test module two and test module three, the second expansion module is plugged with the test module one through a network cable C1, and the first expansion module is plugged with the test module two and the test module three through a network cable C3 and a network cable C5 respectively.

3. The control system topology of the variable pitch test bench according to claim 2 is characterized in that: The single-axis control module includes a single-axis PLC host for axis one, an axis one extension module, a single-axis PLC host for axis two, an axis two extension module, a single-axis PLC host for axis three and an axis three extension module. The axis one extension module is plugged into the test module one via a network cable C2, the axis two extension module is plugged into the test module two via a network cable C4, and the axis three extension module is plugged into the test module three via a network cable C6.

4. The control system topology of the variable pitch test bench according to claim 3 is characterized in that: The three-axis PLC host and the single-axis PLC host of axis one are electrically connected to switch one, and switch one is electrically connected to the PLC host for tested pitch control of the test bench computer loaded with upper software, the test computer pitch upper software and pitch system one, and the PLC host for tested pitch control is electrically connected to pitch system one.

5. The control system topology structure of the variable pitch test bench according to claim 4 is characterized in that: The single axis of axis 2 uses a PLC host to be electrically connected to switch 2, and switch 2 is respectively electrically connected to the test bench computer to load the upper software, the test computer pitch upper software and the PLC host for the tested pitch control of pitch system 2, and the PLC host for the tested pitch control is electrically connected to pitch system 2.

6. The control system topology of the variable pitch test bench according to claim 5 is characterized in that: The single axis of axis three uses a PLC host to be electrically connected to switch three, and switch three is respectively electrically connected to the upper software loaded by the test bench computer, the test computer pitch upper software and the PLC host for the tested pitch control of pitch system three, and the PLC host for the tested pitch control is electrically connected to pitch system three.

7. The control system topology of the variable pitch test bench according to claim 6 is characterized in that: The test module one includes a third expansion module, a DI input module, a DO output module, a PT100 AI input module, a torque and speed AI input module and an RS485 module. The third expansion module is selectively connected to the second expansion module and the axis one expansion module through the network cable C1 and the network cable C2 respectively.

8. The control system topology structure of the variable pitch test bench according to claim 6 is characterized in that: The test module 2 includes a third expansion module, a DI input module, a DO output module, a PT100 AI input module, a torque and speed AI input module and an RS485 module. The third expansion module is selectively connected to the second expansion module and the axis two expansion module through the network cable C3 and the network cable C4 respectively.

9. The control system topology structure of the variable pitch test bench according to claim 3 is characterized in that: The test module three includes a third expansion module, a DI input module, a DO output module, a PT100 AI input module, a torque and speed AI input module and an RS485 module. The third expansion module is selectively connected to the second expansion module and the axis three expansion module through the network cable C5 and the network cable C6 respectively.

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