Fan variable pitch debugging circuit

Abstract

The utility model discloses a fan variable pitch debugging circuit which at least comprises a main module, a control module and an external module. The main module and the control module are connected to a zero line and a live line. Wherein the main module is provided with a power supply unit used for being connected with a fan variable pitch device to be debugged, and an armature unit, an excitation unit and a brake unit which are arranged at the output end of the power supply unit in parallel; an armature control unit, an excitation control unit and a brake control unit are arranged on the control module; the external module comprises a motor armature connected to the armature unit, a motor excitation connected to the excitation unit, and a motor brake connected to the brake unit. The beneficial effects of the utility model are that the plugging power supply unit supplies power to the main module, the control module and the external module, so that the main module, the control module and the external module respectively control the motor armature, excitation and brake of the separately excited direct current variable pitch motor, and the wind field variable pitch debugging function can be realized in a short time.

Description

Technical Field

[0001] This utility model belongs to the field of circuit design technology, and in particular relates to a wind turbine pitch control circuit. Background Technology

[0002] With the continuous development of the wind power industry, early DC pitch systems were prevalent, and the wind turbines, installed early and in operation for many years, are now mostly out of warranty. Turbine failures are frequent, especially pitch issues, which are a high-risk area for failure. The number of components requiring maintenance is increasing, and after replacing or maintaining pitch system components, calibration, commissioning, and jogging tests are necessary. To ensure reliable system operation, manual equipment is generally used to zero-calibrate power components such as the pitch motor. However, since the wind turbine power generation system operates in real-time, prolonged shutdowns will inevitably affect power generation. To minimize construction time, increase reliability, and reduce the impact of wind farm upgrades on power generation, in-depth maintenance solutions should ideally not involve changes to any unrelated components, and should be relatively simple, easy to implement, safe, reliable, and easy to maintain, in addition to equipping essential components. Early commissioning involved running the entire pitch system, which could cause other internal components to operate as well, posing risks to hub-mounted commissioning, especially after replacing pitch bearings, turbine blades, etc., requiring pitch commissioning.

[0003] To address the aforementioned issues, designing a wind turbine pitch control circuit is a crucial technical problem that those skilled in the art need to solve. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems in the prior art and to provide a wind turbine pitch control circuit.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A wind turbine pitch control debugging circuit includes at least a main module, a control module, and an external module. The main module and the control module are connected to a neutral wire and a live wire, respectively. The main module has a power supply unit for connecting the wind turbine pitch control device to be debugged, and an armature unit, an excitation unit, and a braking unit connected in parallel at the output of the power supply unit. The control module has an armature control unit, an excitation control unit, and a braking control unit. The external module includes a motor armature connected to the armature unit, a motor excitation unit connected to the excitation unit, and a motor brake connected to the braking unit. After the power supply unit is connected to the wind turbine pitch control device to be debugged, the braking control unit controls the opening of the braking unit and the motor brake. The armature control unit starts and adjusts the operation of the motor armature on the armature unit, and the excitation control unit controls the excitation unit to rotate forward or backward, thereby adjusting the current flow of the motor excitation and controlling the wind turbine to rotate forward or backward, achieving automatic and rapid debugging and precise positioning of the wind turbine pitch control device.

[0007] Preferably, the power supply unit includes a power supply plug connected to the wind turbine pitch device to be debugged, a power supply control switch and a power indicator light disposed between the power supply plug and the neutral wire and the live wire; the circuit connection is determined by observing the power indicator light.

[0008] Preferably, the armature unit includes a first air switch connected to the neutral wire and the live wire respectively. The output terminal of the first air switch is connected to two power modules, and the output terminals of the two power modules are each provided with a first switch. The output terminals of the two first switches are electrically connected to the motor armature through a first plug. When the first switch is closed, the motor armature is energized.

[0009] Preferably, the output terminal of one of the first switches is connected in series with three resistors arranged in parallel to limit current and prevent runaway and damage to the motor armature.

[0010] Preferably, the excitation unit includes a second air switch connected to the neutral wire and the live wire respectively, a power module connected in series with the two second air switches, and two sets of second switches connected in parallel at the output end of the power module. The output ends of the two sets of second switches are connected to the motor excitation through a second plug. One of the two sets of second switches is closed to energize the motor excitation and drive the motor excitation to rotate forward or in reverse.

[0011] Preferably, the braking unit includes a third air switch connected to the neutral wire and the live wire respectively, a power module connected in series with the two third air switches, a third switch at the output end of the power module, and the output end of the third switch connected to the motor brake through a third plug; the motor brake is energized when the third switch is closed.

[0012] Preferably, the output terminal of the power module in the braking unit is also connected to a cooling fan, and the output terminal of the cooling fan is connected in series with a fourth switch to control its start and stop; the cooling fan dissipates the heat generated during use.

[0013] Preferably, the control module is connected to the live wire via a fourth air switch; the output terminal of the fourth air switch is provided with the armature control unit, the excitation control unit, and the brake control unit in parallel; the armature control unit includes a first rotary switch and a first contactor coil connected in series; the output of the first contactor coil is connected to the neutral wire; when the first rotary switch is closed, the first contactor coil is energized and drives the two power modules on the armature unit and the motor armature to work.

[0014] Preferably, the excitation control unit includes a forward rotation control block and a reverse rotation control block connected in parallel, with one of them selectively closed; the forward rotation control block includes a forward rotation rotary switch, a forward rotation on / off switch, and a forward rotation contactor coil connected in series; after the forward rotation rotary switch and the forward rotation on / off switch are closed, the forward rotation contactor coil is energized and drives the power module on the excitation unit and the motor to excite, and the motor is energized to rotate forward; the reverse rotation control block includes a reverse rotation rotary switch, a reverse rotation on / off switch, and a reverse rotation contactor coil connected in series; after the reverse rotation rotary switch and the reverse rotation on / off switch are closed, the reverse rotation contactor coil is energized and drives the power module on the excitation unit and the motor to excite, and the motor is energized to rotate in reverse; both the forward rotation rotary switch and the reverse rotation rotary switch are connected in parallel with the first rotary switch at the output terminal of the fourth air switch; both the forward rotation contactor coil and the reverse rotation contactor coil are connected in parallel with the first contactor coil on the neutral line.

[0015] Preferably, the brake control unit includes a third rotary switch and a third on / off switch connected in parallel at the output terminal of the fourth air switch, and a third contactor coil connected in series at the output terminals of the third rotary switch and the third on / off switch; after the rotary switch or the third on / off switch is closed, the third contactor coil is energized and drives the power module, the motor brake and / or the cooling fan on the brake unit to work; the output terminal of the third contactor coil is connected in parallel with the first contactor coil to the neutral line.

[0016] The advantages of this utility model's technical solution are mainly reflected in:

[0017] By plugging and unplugging the power supply unit to supply power to the main module, control module and external module, the three can control the motor armature, excitation and braking of the separately excited DC pitch motor, and the wind farm pitch commissioning function can be realized in a short time. The whole process is automatically controlled by the circuit, without the need for manual zeroing, and the commissioning process will not affect the operation of other components inside the wind power system, and will not bring any risks to the commissioning inside the hub.

[0018] Three resistors are connected in parallel in the armature unit and are positioned between the first switch and the first plug to limit current and prevent runaway and damage to the motor armature. In addition, connecting the three resistors in parallel reduces the resistance of a single resistor, reduces space occupation, and facilitates circuit wiring.

[0019] By controlling the on / off state of the forward and reverse contactor coils respectively using a forward rotary switch and a reverse rotary switch, the excitation direction of the separately excited DC pitch motor is switched, enabling the motor to rotate in the forward or reverse direction, thereby achieving precise positioning of the wind turbine blades. Attached Figure Description

[0020] Figure 1 : Main module circuit structure diagram of a preferred embodiment of this utility model;

[0021] Figure 2 : Circuit structure diagram of the control module of the preferred embodiment of this utility model. Detailed Implementation

[0022] The purpose, advantages, and features of this utility model will be illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of applying the technical solutions of this utility model, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this utility model.

[0023] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Also, in the description of the solution, with the operator as a reference, the direction closer to the operator is the proximal end, and the direction farther from the operator is the distal end.

[0024] like Figures 1 to 2 As shown, this utility model discloses a wind turbine pitch control debugging circuit, which includes at least a main module 1, a control module 2, and an external module 3. Both the main module 1 and the control module 2 are connected to the neutral and live wires, respectively. Further, the main module 1 is equipped with a power supply unit 10 for connecting the wind turbine pitch control device to be debugged, and an armature unit 11, an excitation unit 12, and a braking unit 13 are connected in parallel at the output end of the power supply unit 10. The control module 2 is equipped with an armature control unit 21, an excitation control unit 22, and a braking control unit 23. The external module 3 is mounted on the wind turbine pitch control device to be tested, and includes a motor armature 31 connected to the armature unit 11, a motor excitation 32 connected to the excitation unit 12, and a motor brake 33 connected to the braking unit 13. After connecting the power supply unit 10 to the wind turbine pitch device to be debugged, the brake control unit 23 controls the brake unit 13 and the motor brake 33 to open. The armature control unit 21 starts and adjusts the operation of the motor armature 31 on the armature unit 11. The excitation control unit 22 controls the excitation unit 12 to rotate forward or backward, thereby adjusting the current flow direction of the motor excitation 32 and controlling the wind turbine to rotate forward or backward, realizing automatic and rapid debugging and precise positioning of the wind turbine pitch device. This utility model supplies power to the main module, control module and external module by plugging and unplugging the power supply unit, so that the three can control the motor armature, excitation and brake of the separately excited DC pitch motor respectively, and realize the wind farm pitch debugging function in a short time.

[0025] Specifically, such as Figure 1 As shown, the power supply unit 10 includes a power plug 101 connected to the wind turbine pitch control device to be tested, a power control switch 102 disposed between the power plug 101 and the neutral and live wires, and a power indicator light 103. The power plug 101 is electrically connected to the wind turbine pitch control device to be tested, and after power is applied, the power control switch 102 is closed. The power indicator light 103 is then observed to determine if the circuit connection is correct. Preferably, the power control switch 102 in this invention consists of a set of switches connected in parallel. When the indicator light 103 is not lit or is not green, it indicates an incorrect circuit connection, and the conductivity of the wind turbine pitch control device to be tested needs to be checked; when the indicator light 103 is green, it indicates a correct circuit connection, and testing can proceed.

[0026] like Figure 1As shown, the armature unit 11 includes a first air switch 111 connected to the neutral wire and the live wire respectively. The output terminal of the first air switch 111 is connected to two power modules 112. Each of the two power modules 112 has a first switch 113 at its output terminal. The output terminals of the two first switches 113 are electrically connected to the motor armature 31 via a first plug 114. When the first switch 113 is closed, the motor armature 31 is energized. Furthermore, the output terminal of one of the first switches 113 is connected in series with three resistors arranged in parallel. These three resistors are positioned between the first switch 113 and the first plug 114 to limit current and prevent runaway and damage to the motor armature 31. Additionally, arranging the three resistors in parallel reduces the resistance of a single resistor, reduces space requirements, and facilitates circuit wiring.

[0027] The excitation unit 12 includes a second air switch 121 connected to the neutral wire and the live wire respectively, and a power module 112 connected in series with the two second air switches 121. Two sets of second switches 123 are connected in parallel to the output terminals of the power module 112. The output terminals of the two sets of second switches 123 are connected to the motor excitation unit 32 via a second connector 124. When the second air switch 121 is closed, one of the two sets of second switches 123 is selectively closed to energize the motor excitation unit 32, which is then driven to rotate forward or reverse by the excitation control unit 22.

[0028] like Figure 1 As shown, the braking unit 13 includes a third air switch 131 connected to the neutral wire and the live wire respectively, and a power module 112 connected in series with the two third air switches 131. The output terminal of the power module 112 is provided with a third switch 133, and the output terminal of the third switch 133 is connected to the motor brake 33 through a third plug 134. When the third air switch 131 is closed, and then the third switch 133 is closed by controlling it, the motor brake 33 is energized, which plays a braking role and limits the excitation of the motor.

[0029] Furthermore, the output terminal of the power module 112 in the braking unit 13 is also connected to a cooling fan 134, and the output terminal of the cooling fan 134 is connected in series with a fourth switch 135 to control its start and stop. The cooling fan 134 dissipates the heat generated in the circuit and electrical components during use, reducing the heat in the debugging circuit and the internal space of the wind turbine pitch device, effectively preventing damage caused by excessive heat generation in the circuit or electrical components, extending the service life of the circuit and electrical components, and improving the safety of circuit use.

[0030] like Figure 2As shown, the control module 2 is connected to the live wire via a fourth air switch 20. The armature control unit 21, the excitation control unit 22, and the brake control unit 23 are connected in parallel at the output of the fourth air switch 20. The armature control unit 21 includes a first rotary switch 211 and a first contactor coil 212 connected in series. The output of the first contactor coil 212 is connected to the neutral wire to form a circuit. When the fourth air switch 20 is closed, and then the first rotary switch 211 is closed, the first contactor coil 212 is energized, thereby driving the two power modules 112 on the armature unit 11 and the motor armature 31 to operate.

[0031] Furthermore, the excitation control unit 22 includes a forward rotation control block 221 and a reverse rotation control block 222 connected in parallel, with one of them selectively closed via a controller or manual control. The forward rotation control block 221 includes a forward rotation rotary switch 2211, a forward rotation on / off switch 2212, and a forward rotation contactor coil 2213 connected in series. When the forward rotation rotary switch 2211 and the forward rotation on / off switch 2212 are closed, the forward rotation contactor coil 2213 is energized, driving the power module 112 on the excitation unit 12 and the motor excitation 32 to operate, at which time the motor excitation 32 rotates forward. The reverse rotation control block 222 includes a reverse rotation rotary switch 2221, a reverse rotation on / off switch 2222, and a reverse rotation contactor coil 2223 connected in series. After the reverse rotary switch 2221 and the reverse on / off switch 2222 are closed, the reverse contactor coil 2223 is energized, driving the power module 112 on the excitation unit 12 and the motor excitation 32 to operate, at which time the motor excitation 32 reverses direction. Simultaneously, the forward rotary switch 2211 and the reverse rotary switch 2221 are both connected in parallel with the first rotary switch 211 at the output terminal of the fourth air switch 20; and the forward contactor coil 2213 and the reverse contactor coil 2223 are both connected in parallel with the first contactor coil 212 on the neutral line. When the fourth air switch 20 and the forward control block 221 or the reverse control block 222 are activated, the excitation unit 12 can be controlled to rotate forward or reverse, thereby adjusting the angle of the wind turbine pitch device. By controlling the on / off state of the forward and reverse contactor coils respectively through the forward and reverse rotary switches, the excitation direction of the separately excited DC pitch motor is switched, enabling the motor to rotate in the forward or reverse direction, thereby achieving precise positioning of the wind turbine blades. The entire process is controlled automatically by the circuit, eliminating the need for manual zeroing. Furthermore, during the commissioning process, other components inside the wind power system will not be activated, thus avoiding any risks to the commissioning inside the hub.

[0032] The brake control unit 23 in the control module 2 includes a third rotary switch 231 and a third on / off switch 232 connected in parallel to the output of the fourth air switch 20, and a third contactor coil 233 connected in series to the outputs of the third rotary switch 231 and the third on / off switch 232. The output of the third contactor coil 233 is connected in parallel with the first contactor coil 212 to the neutral line to form a circuit. When the fourth air switch 20 is closed, the third rotary switch 231 or the third on / off switch 232 is then closed to energize the third contactor coil 233, which can then drive the power module 112, the motor brake 33, and / or the cooling fan 134 on the brake unit 13.

[0033] The working process of this utility model is briefly described below:

[0034] S1, close the fourth air switch 20 in the control module 2, and simultaneously disconnect the third rotary switch 231 and the third on / off switch 232, so that the third contactor coil 233 is de-energized;

[0035] S2, close the third air switch 131 and the fourth switch 135 in the main module 1, and at the same time open the third switch 133, so that the brake 33 connected to the brake unit 13 is de-energized and the cooling fan 134 is energized;

[0036] S3, close the first air switch 111 and the first switch 113, and plug the first plug 114 into the motor armature 31 in the external module 3, so that the power module 112 in the armature unit 11 and the motor armature 31 are powered;

[0037] S4, Close the forward rotary switch 2211 and the forward on / off switch 2212 to energize the forward contactor coil 2213; or close the reverse rotary switch 2221 and the reverse on / off switch 2212 to energize the reverse contactor coil 2223.

[0038] S5, close the second air switch 121 and the second switch 123, so that the power module 112 in the excitation unit 12 and the motor excitation 32 connected to the excitation unit 12 are energized, and the forward rotation contactor coil 2213 or the reverse rotation contactor coil 2223 in the control module 2 drives the motor excitation 32 in the external module 3 to rotate in the forward or reverse direction, so that the wind turbine pitch device is adjusted to the accurate angle.

[0039] Furthermore, the wind turbine pitch control circuit disclosed in this invention is applicable to different wind power systems of the same motor type, offering wide adaptability and high flexibility. It effectively avoids problems such as operators being unfamiliar with the manual control circuits of various original pitch control systems or experiencing multiple unsuccessful attempts at debugging due to the complexity of the system's internal circuits. Simultaneously, the circuit structure disclosed in this invention enables rapid and reliable pitch control debugging of separately excited DC pitch motors in the field.

[0040] This utility model has many other embodiments. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A wind turbine pitch control circuit, characterized in that: It includes at least a main module (1), a control module (2), and an external module (3); the main module (1) and the control module (2) are both connected to the neutral wire and the live wire; wherein, the main module (1) is provided with a power supply unit (10) for connecting the wind turbine pitch device to be debugged, and an armature unit (11), an excitation unit (12), and a braking unit (13) are connected in parallel at the output end of the power supply unit (10); the control module (2) is provided with an armature control unit (21), an excitation control unit (22), and a braking control unit (23); the external module (3) is located in the wind turbine pitch device to be debugged, and includes a motor armature (31) connected to the armature unit (11), and connected to... The excitation unit (12) is connected to the motor excitation (32), and the brake unit (13) is connected to the motor brake (33). After the power supply unit (10) is connected to the wind turbine pitch device to be debugged, the brake control unit (23) controls the brake unit (13) and the motor brake (33) to open. The armature control unit (21) starts and adjusts the operation of the motor armature (31) on the armature unit (11). The excitation control unit (22) controls the excitation unit (12) to rotate forward or reverse, thereby adjusting the current flow direction of the motor excitation (32) and controlling the wind turbine to rotate forward or reverse, so as to realize automatic and fast debugging and precise positioning of the wind turbine pitch device.

2. The wind turbine pitch control circuit according to claim 1, characterized in that: The power supply unit (10) includes a power supply plug (101) connected to the wind turbine pitch device to be debugged, a power supply control switch (102) and a power indicator light (103) set between the power supply plug (101) and the neutral wire and the live wire; the circuit connection is determined by observing the power indicator light (103).

3. The wind turbine pitch control circuit according to claim 2, characterized in that: The armature unit (11) includes a first air switch (111) connected to the neutral wire and the live wire respectively. The output terminal of the first air switch (111) is connected to two power modules (112). The output terminals of the two power modules (112) are each provided with a first switch (113). The output terminals of the two first switches (113) are electrically connected to the motor armature (31) through a first plug (114). When the first switch (113) is closed, the motor armature (31) is energized.

4. The wind turbine pitch control circuit according to claim 3, characterized in that: One of the first switches (113) has its output terminal connected in series with three resistors arranged in parallel to limit current and prevent damage to the motor armature (31).

5. The wind turbine pitch control circuit according to claim 4, characterized in that: The excitation unit (12) includes a second air switch (121) connected to the neutral wire and the live wire respectively, and a power module (112) connected in series on the two second air switches (121). The output end of the power module (112) is provided with two sets of second switches (123) connected in parallel. The output ends of the two sets of second switches (123) are connected to the motor excitation (32) through a second plug (124). One of the two sets of second switches (123) is closed to energize the motor excitation (32) and drive the motor excitation (32) to rotate forward or reverse.

6. The wind turbine pitch control circuit according to claim 5, characterized in that: The braking unit (13) includes a third air switch (131) connected to the neutral wire and the live wire respectively, and a power module (112) connected in series on the two third air switches (131). The output end of the power module (112) is provided with a third switch (133). The output end of the third switch (133) is connected to the motor brake (33) through a third plug. When the third switch (133) is closed, the motor brake (33) is energized.

7. A wind turbine pitch control circuit according to claim 6, characterized in that: The output of the power module (112) in the braking unit (13) is also connected to a cooling fan (134), and the output of the cooling fan (134) is connected in series with a fourth switch (135) to control its start and stop; the cooling fan (134) dissipates the heat generated during use.

8. The wind turbine pitch control circuit according to claim 7, characterized in that: The control module (2) is connected to the live wire via a fourth air switch (20); the output of the fourth air switch (20) is connected in parallel with the armature control unit (21), the excitation control unit (22) and the brake control unit (23); the armature control unit (21) includes a first rotary switch (211) and a first contactor coil (212) connected in series; the output of the first contactor coil (212) is connected to the neutral wire; after the first rotary switch (211) is closed, the first contactor coil (212) is energized and drives the two power modules (112) on the armature unit (11) and the motor armature (31) to work.

9. A wind turbine pitch control circuit according to claim 8, characterized in that: The excitation control unit (22) includes a forward rotation control block (221) and a reverse rotation control block (222) connected in parallel, with one of them being closed. The forward rotation control block (221) includes a forward rotation rotary switch (2211), a forward rotation on / off switch (2212), and a forward rotation contactor coil (2213) connected in series. When the forward rotation rotary switch (2211) and the forward rotation on / off switch (2212) are closed, the forward rotation contactor coil (2213) is energized and drives the power module (112) on the excitation unit (12) and the motor excitation (32) to work, and the motor excitation (32) rotates forward. The reverse rotation control block (222) includes a reverse rotation rotary switch (2221) connected in series, with the reverse rotation on / off switch being closed. The reverse contactor coil (2222) and the reverse contactor coil (2223) are closed; after the reverse rotary switch (2221) and the reverse on / off switch (2222) are closed, the reverse contactor coil (2223) is energized and drives the power module (112) and the motor excitation (32) on the excitation unit (12) to work, and the motor excitation (32) is reversed; the forward rotary switch (2211) and the reverse rotary switch (2221) are both connected in parallel with the first rotary switch (211) at the output end of the fourth air switch (20); the forward contactor coil (2213) and the reverse contactor coil (2223) are both connected in parallel with the first contactor coil (212) on the neutral line.

10. A wind turbine pitch control circuit according to claim 9, characterized in that: The brake control unit (23) includes a third rotary switch (231) and a third on / off switch (232) connected in parallel to the output of the fourth air switch (20), and a third contactor coil (233) connected in series to the output of the third rotary switch (231) and the third on / off switch (232); after the third rotary switch (231) or the third on / off switch (232) is closed, the third contactor coil (233) is energized and drives the power module (112), the motor brake (33) and / or the cooling fan (134) on the brake unit (13) to work; the output of the third contactor coil (233) is connected in parallel with the first contactor coil (212) to the neutral line.

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