Bidirectional converter test apparatus

Abstract

The present application relates to the technical field of power test equipment, and provides a bidirectional converter test equipment, which comprises a container with a wire arranging cavity, one side of which is provided with an entrance and exit and a door plate; a wire arranging disc is rotatably arranged in the wire arranging cavity, and a cable is wound outside the wire arranging disc; a cable winding driving mechanism comprises a cable winding power structure and a clutch assembly, the cable winding power structure is connected with the wire arranging disc through the clutch assembly, the cable winding power structure is used for driving the wire arranging disc to rotate and wind the cable, and the clutch assembly is used for connecting or disconnecting the output end of the cable winding power structure with the wire arranging disc; a tractor is connected with one end of the cable and is used for towing the cable towards the bidirectional converter to be tested. The bidirectional converter test equipment of the present application can complete long-distance cable arrangement through the tractor even if the test equipment and the bidirectional converter to be tested cannot be arranged close to each other due to site restrictions, and can realize cable winding through the cable winding driving mechanism, so that the manpower is greatly saved, and the efficiency of on-site debugging is improved.

Description

Technical Field

[0001] This invention relates to the field of power testing equipment technology, and in particular to a bidirectional converter testing device. Background Technology

[0002] With the development of power electronics testing technology, the on-site commissioning and condition verification of high-power bidirectional converters have placed higher demands on testing equipment. Due to the high power rating of bidirectional converters, the accompanying test cables are typically large in diameter and heavy, requiring frequent deployment and retraction at the testing site. Furthermore, due to limitations in on-site operating conditions, the testing equipment and the bidirectional converter under test often cannot be placed close together; a considerable distance usually exists between them.

[0003] In related technologies, test cables are usually handled and dragged manually. Testers need to manually pull the heavy cables from the storage location to the device under test, which is far away, and then manually coil them up and put them away after the test.

[0004] However, the above-mentioned manual cable laying method is extremely laborious and inefficient when on-site equipment cannot be approached, and it is difficult to meet the needs of rapid on-site debugging. Summary of the Invention

[0005] This invention provides a bidirectional converter testing device to solve the problem of time-consuming and labor-intensive manual cable laying in the prior art.

[0006] This invention provides a bidirectional converter testing device, comprising: a container having a cable management cavity, an inlet / outlet and a door panel on one side of the container, the inlet / outlet connecting the cable management cavity to the outside space, and the door panel for opening and closing the inlet / outlet; a cable management reel rotatably disposed within the cable management cavity, with cables wound around its outer side; a cable take-up drive mechanism including a take-up power structure and a clutch assembly, the take-up power structure being connected to the cable management reel via the clutch assembly, the take-up power structure driving the cable management reel to rotate and take up the cables, and the clutch assembly connecting or disconnecting the output end of the take-up power structure from the cable management reel; and a tractor tractor removably disposed within the cable management cavity, the tractor tractor being connected to one end of the cables, and the tractor tractor being used to pull the cables toward the bidirectional converter under test.

[0007] According to one embodiment of the present invention, the device further includes: a driven support vehicle, the driven support vehicle including a support vehicle body and a clamping assembly disposed above the support vehicle body, the clamping assembly being used to clamp and fix the cable, and multiple driven support vehicles being provided; wherein, when the length of the portion of the cable outside the cable management cavity is greater than a preset value, at least a portion of the driven support vehicles are located outside the cable management cavity, and when the length of the portion of the cable outside the cable management cavity is less than or equal to the preset value, all of the driven support vehicles are located inside the cable management cavity; wherein, the clamping assembly of the driven support vehicle located outside the cable management cavity is connected to the cable; and the clamping assembly of the driven support vehicle located inside the cable management cavity is detached from the cable.

[0008] According to one embodiment of the present invention, it further includes: a storage box fixed to the container, the storage box having a pick-up / placement opening and a storage cavity, the pick-up / placement opening communicating with the inside and outside of the storage cavity; and a conveying device for conveying the driven support vehicles located in the storage cavity one by one to the pick-up / placement opening, or conveying the driven support vehicles located in the pick-up / placement opening into the storage cavity.

[0009] According to one embodiment of the present invention, the conveying device includes: a conveying tray rotatably disposed within the storage box, the conveying tray having a plurality of storage positions above it, the plurality of storage positions being evenly arranged along the circumference of the conveying tray, each of the storage positions being used to store one of the driven support carts; and a rotary drive assembly connected to the conveying tray, the rotary drive assembly being used to drive the conveying tray to rotate, so that the plurality of storage positions are alternately moved one by one to a position opposite to the pick-up / place-out port.

[0010] According to one embodiment of the present invention, the conveying device further includes: a locking component, wherein multiple locking components are provided corresponding to the storage positions, and the locking components are used to releasably lock the driven support vehicle in the corresponding storage position.

[0011] According to one embodiment of the present invention, the locking assembly includes: a locking pin, which is horizontally slidably connected to the conveyor tray, and one end of the locking pin is used for locking into the driven support vehicle, the locking pin having a tapered surface; an elastic reset member, which connects the conveyor tray and the locking pin, the elastic reset member being used to give the locking pin a tendency to move toward the locking position; a pressure rod, which is slidably connected to the conveyor tray in a vertical direction, the lower side of the pressure rod slidingly contacting the tapered surface; the storage box is provided with a pressing protrusion, the pressing protrusion being configured such that when the storage position rotates with the conveyor tray to a position opposite to the pick-up / drop-off port, the pressing protrusion presses down on the pressure rod of the locking assembly corresponding to the storage position, pushing the locking pin to move to the unlocked position against the force of the elastic reset member, so that the locking pin disengages from the driven support vehicle.

[0012] According to one embodiment of the present invention, the cable includes a plurality of parallel sub-wires; the cable management reel is provided with a plurality of winding grooves, each winding groove being wound with one of the sub-wires; the clamping assembly includes a plurality of clamping units arranged side by side, each clamping unit being used to clamp one of the sub-wires; the tractor is simultaneously connected to one end of each of the sub-wires.

[0013] According to one embodiment of the present invention, the clutch assembly includes: a permanent magnet coupler, the permanent magnet coupler including a driving rotor and a driven rotor, the driving rotor being connected to the output end of the take-up power structure, the driven rotor being connected to the shaft of the cable winding reel, and the driving rotor and the driven rotor transmitting torque through magnetic coupling; a one-way bearing, disposed between the driven rotor and the shaft of the cable winding reel, the one-way bearing being configured such that: when the take-up power structure drives the winding, the one-way bearing is in a locked state, transmitting the torque of the driven rotor to the shaft of the cable winding reel; when the cable is pulled and unwound, the one-way bearing allows the shaft of the cable winding reel to rotate freely relative to the driven rotor.

[0014] According to one embodiment of the present invention, it further includes: a damping mechanism connected to the cable management disc for providing rotational damping to the cable management disc.

[0015] According to one embodiment of the present invention, the damping mechanism includes: a damping disk fixedly disposed on the rotating shaft of the cable management disk, the damping disk being made of a conductive material; a damping adjustment frame slidably disposed within the cable management cavity; a permanent magnet damping block mounted on the damping adjustment frame, the permanent magnet damping block having an air gap between it and the damping disk; and an adjustment drive connected to the damping adjustment frame for driving the damping adjustment frame to move and adjust the size of the air gap.

[0016] The bidirectional converter testing equipment provided by this invention winds cables onto a cable management reel, which is rotatably positioned within the cable management cavity of a container. A tractor unit, capable of accessing and exiting the cavity, connects one end of the cable. When cable deployment is required, the tractor unit moves towards the bidirectional converter under test, pulling the cable from the cable management cavity through the inlet and outlet. During this pulling process, the cable drives the cable management reel to rotate, achieving automatic unwinding. This eliminates the need for manual long-distance transport of heavy cables for cable deployment. When cable rewinding is required, the cable management reel is rotated via a rewinding drive mechanism, automatically rewinding the cable back onto the reel, avoiding manual winding. A clutch assembly connects or disconnects the rewinding drive mechanism from the cable management reel, ensuring the reel can rotate freely without interference from the rewinding drive mechanism during unwinding. Therefore, even if site limitations prevent the testing equipment and the bidirectional converter under test from being placed adjacently, long-distance cable deployment can be completed using a tractor unit, and cable rewinding can be achieved via the rewinding drive mechanism, significantly saving manpower and improving on-site debugging efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a bidirectional converter testing device provided by the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of a bidirectional converter testing device provided by the present invention.

[0020] Figure 3 This is a schematic diagram illustrating the application scenario of a tractor in a bidirectional converter testing device provided by the present invention.

[0021] Figure 4 This is a schematic diagram of the winding drive mechanism in a bidirectional converter testing device provided by the present invention.

[0022] Figure 5 This is a schematic diagram of the auxiliary heat dissipation mechanism in a bidirectional converter testing device provided by the present invention.

[0023] Figure 6 This is a top view of the storage box in a bidirectional converter testing device provided by the present invention.

[0024] Figure 7 This is a schematic diagram of the internal structure of the storage box in a bidirectional converter testing device provided by the present invention.

[0025] Figure 8 yes Figure 7 Enlarged view of point A in the image.

[0026] Figure 9 This is a schematic diagram of the damping mechanism in a bidirectional converter testing device provided by the present invention.

[0027] Figure label:

[0028] 100. Container; 110. Cable management cavity; 120. Inlet / outlet; 130. Door panel; 140. Test unit receiving cavity;

[0029] 200. Cable tray; 210. Cables;

[0030] 300. Take-up drive mechanism; 310. Take-up power structure; 320. Clutch assembly; 321. Driving rotor; 322. Driven rotor; 323. One-way bearing;

[0031] 400. Tractor;

[0032] 500. Auxiliary heat dissipation mechanism; 510. Transmission switching component; 520. Auxiliary cooling fan;

[0033] 600. Driven support vehicle; 610. Support vehicle body; 620. Clamping assembly;

[0034] 700. Storage box; 710. Retrieval port; 720. Extrusion protrusion;

[0035] 800. Conveying device; 810. Conveying disc; 820. Rotary drive assembly; 830. Locking assembly; 831. Locking pin; 832. Elastic reset element; 833. Pressure bar;

[0036] 900 Damping mechanism; 910 Damping disc; 920 Damping adjustment frame; 930 Permanent magnet damping block; 940 Adjustment drive component. Detailed Implementation

[0037] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0038] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0040] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Combination Figures 1-3An embodiment of the bidirectional converter testing equipment of the present invention includes a container 100, a cable tray 200, a cable winding drive mechanism 300, and a tractor 400. The container 100 has a cable tray cavity 110. An inlet / outlet 120 and a door 130 are provided on one side of the container 100. The inlet / outlet 120 connects the cable tray cavity 110 to the external space, and the door 130 is used to open and close the inlet / outlet 120. The cable tray 200 is rotatably disposed within the cable tray cavity 110, and a cable 210 is wound around its outer side. The cable winding drive mechanism 300 includes a cable winding power structure 310 and a clutch assembly 320. The cable winding power structure 310 is connected to the cable tray 200 through the clutch assembly 320. The cable winding power structure 310 is used to drive the cable tray 200 to rotate and wind up the cable 210. The clutch assembly 320 is used to connect or disconnect the output end of the cable winding power structure 310 from the cable tray 200. The tractor 400 is installed in the cable management cavity 110 and can enter and exit. The tractor 400 is connected to one end of the cable 210 and is used to pull the cable 210 toward the bidirectional converter under test.

[0043] For example, the tractor 400 can be a small cart with wheels and rollers at its bottom, allowing it to travel on the bottom surface of the cable management cavity 110 and the ground. When it is necessary to lay the cable 210, the door panel 130 is first opened to open the inlet and outlet 120, and the tractor 400 drives out of the cable management cavity 110 through the inlet and outlet 120 to the outside space. As the tractor 400 moves outward, it drags the cable 210 behind it, and the cable 210 is gradually pulled out from the cable management reel 200. The cable 210 drives the cable management reel 200 to rotate around its axis, thus unwinding the cable. During this process, the clutch assembly 320 is in the disengaged state, meaning there is no power transmission between the output end of the take-up power structure 310 and the cable tray 200. Therefore, the cable tray 200 will not be resisted by the take-up power structure 310 when it rotates and can rotate freely. The tractor 400 only needs to overcome the slight friction between the cable 210 and the cable tray 200 and the weight of the cable 210 itself to easily drag the cable 210 to the location of the bidirectional converter to be tested at a distance.

[0044] When the test is completed and cable 210 needs to be wound up, the clutch assembly 320 switches to the connected state, connecting the output end of the winding power structure 310 to the cable management reel 200. The winding power structure 310 starts, driving the cable management reel 200 to rotate in the opposite direction to the unwinding direction, winding cable 210 back onto the cable management reel 200 segment by segment. As cable 210 is wound up, the tractor 400 is pulled by cable 210 and gradually moves towards the inlet / outlet 120, eventually returning to the cable management cavity 110 along with cable 210, and then the door panel 130 is closed.

[0045] Through the above structure, the laying and winding of cable 210 are mechanized, eliminating the need for manual long-distance transport of heavy cable 210 and manual coiling, greatly saving manpower and time. Simultaneously, the door panel 130 can close the cable management chamber 110 when not in use, protecting the internal cable management reel 200, cable 210, and tractor 400 from external dust and rain. The entire device integrates the cable 210 winding and unwinding function into a transportable container 100, facilitating truck transport to various sites. Upon arrival, simply opening the door panel 130 is sufficient to begin operations, significantly improving the efficiency and flexibility of on-site commissioning.

[0046] Optionally, the tractor 400 includes a frame, a running gear, and a traction connector. The frame is the main load-bearing structure of the tractor 400 and can be a frame made of welded or bolted metal profiles and / or plates, possessing sufficient strength and rigidity to withstand the tensile force during traction. The running gear is installed at the bottom of the frame to support the frame and move on the bottom surface of the cable management cavity 110 and the ground. The running gear may include multiple wheels, at least some of which are swivel wheels for easy steering, and at least some of which are wheels with braking devices to ensure reliable parking of the tractor 400 after reaching the predetermined position. The traction connector is located at a suitable position such as the rear end or top of the frame and is used for fixed connection to one end of the cable 210. The traction connector can adopt structures such as quick hooks, threaded joints, flange clamps, or pin-type connectors to ensure a secure connection between the end of the cable 210 and the frame and facilitate assembly and disassembly. One end of the cable 210 is fixed to the frame via a traction connector. When the tractor 400 moves forward, the tension is directly transmitted to the cable 210 through the frame, causing the cable 210 to gradually unwind from the cable reel 200.

[0047] In an alternative embodiment, the tractor unit 400 may also include a power system for driving the traveling mechanism automatically. The power system may include a drive motor, a battery, and a control unit. The drive motor is connected to the traveling mechanism, the battery provides power to the drive motor, and the control unit controls the start, stop, speed, and steering of the drive motor. Operators can send commands to the control unit via a handheld remote control or an operating panel on the tractor unit 400 to achieve wireless remote control or manual driving of the tractor unit 400. This electric traction method can further reduce the labor intensity of personnel, and is particularly suitable for scenarios requiring long-distance traction or frequent back-and-forth wiring.

[0048] In another alternative, the tractor unit 400 can also be manually towed, meaning it lacks a power system and is moved by the operator directly pushing and pulling the frame. This method is simple in structure and low in cost, suitable for short towing distances or situations where automation requirements are not high. The manually towed tractor unit 400 can be equipped with a push handle for easy application of force by the operator.

[0049] The tractor 400 may also include a hub for gathering and securing the ends of multiple parallel sub-lines together. The hub may be a plate-like structure or a frame structure with multiple through holes, through which each sub-line passes and is secured to the traction connector, ensuring that the ends of all sub-lines are arranged in a neat order and have the same lead-out length, facilitating one-time connection to the various terminals of the bidirectional converter under test.

[0050] The tractor unit 400 may also include a position detection device for real-time detection of the position or travel distance of the tractor unit 400 and transmission of the detection signal to the control system. This allows the control system to automatically control the start / stop of the cable reel drive mechanism 300 or the operation of the damping mechanism 900 based on the position of the tractor unit 400. The position detection device may be a limit switch, proximity switch, laser rangefinder, or encoder, etc.

[0051] For example, the walking mechanism can employ a tracked walking device to enhance adaptability to complex terrain; or a rail-type walking device, i.e., laying tracks on the cable management cavity 110 and the site ground, with the tractor 400 traveling along the tracks to ensure the accuracy of the movement path. The power system can also employ an external power supply method, i.e., supplying power to the tractor 400 via a tow cable or sliding contact line to avoid battery power limitations.

[0052] Optionally, a locking device is provided inside the cable management cavity 110 to releasably lock the tractor 400. When the tractor 400 is in its storage position within the cable management cavity 110, the locking device can fix the tractor 400 relative to the container 100, preventing it from moving freely within the cable management cavity 110 due to bumps or vibrations during transportation or when the device is not in operation, thus avoiding collisions and damage to the cable reel 200, cables 210, or other equipment. When it is necessary to lay cables 210, the operator releases the locking device, allowing the tractor 400 to freely drive out of the cable management cavity 110. After the tractor 400 completes cable laying and returns to the cable management cavity 110, it is locked back into its storage position to ensure stability before transportation or the next use.

[0053] For example, the locking device includes a lock seat and a locking element. The lock seat is fixedly mounted on the bottom surface or side wall of the cable management cavity 110, and the locking element is mounted on the frame of the tractor 400. The locking element and the lock seat are detachably coupled. The locking element can be in the form of a hook, a latch, etc., and the lock seat is correspondingly provided with a pin hole, a hanging ring, a slot, etc. When the tractor 400 moves to the predetermined storage position, the locking element and the lock seat automatically align. The operator manually operates or pushes the locking element into the lock seat by spring force to achieve locking. When unlocking is required, the operator manually pulls or presses the locking element to disengage it from the lock seat.

[0054] Alternatively, the locking device includes a locking structure linked to the door panel 130. For example, the locking device includes a linkage rod and an elastic element. One end of the linkage rod is connected to the door panel 130, and the other end is equipped with a hook. When the door panel 130 is closed, the door panel 130 drives the linkage rod to move, causing the hook to automatically engage with the slot on the tractor 400, locking the tractor 400. When the door panel 130 is opened, the linkage rod moves in the opposite direction, causing the hook to disengage from the tractor 400, automatically unlocking it. This linkage structure requires no additional operation, automatically locking and unlocking the tractor 400 while the door is opening and closing, making operation more convenient.

[0055] The locking device can also employ an electromagnetic lock, which controls the movement of the locking element by energizing and de-energizing an electromagnet. When locking is required, the electromagnet is energized, generating magnetic force to attract the locking element into the lock seat; when unlocking is required, the electromagnet is de-energized, and the locking element automatically retracts under the action of a return spring. Electromagnetic locks can be centrally controlled through a control system, facilitating automated operation. Alternatively, the locking device can employ a friction-type locking structure, where a clamping block presses against the wheels or frame of the tractor 400, relying on friction to achieve locking.

[0056] In some embodiments, the container 100 has a test unit receiving cavity 140. The test unit receiving cavity 140 is arranged adjacent to or separated from the cable management cavity 110 by a partition. The test unit receiving cavity 140 is used to accommodate functional units required for testing, such as programmable power supplies, power grid simulation sources, battery simulation devices, power analyzers, data acquisition devices, control computers, etc.

[0057] Optionally, the test unit housing 140 is provided with an inspection door or ventilation opening that connects to the outside, facilitating equipment installation, maintenance, and heat dissipation. Each functional unit within the test unit housing 140 can be electrically connected to the cable 210 in the cable management cavity 110 via cables or busbars. After the tractor 400 lays the cable 210 to the bidirectional converter under test, the equipment within the test unit housing 140 can apply test signals to the device under test or receive feedback signals via the cable 210, thus achieving debugging and status verification functions.

[0058] Optionally, the test unit housing cavity 140 is also equipped with guide rails, brackets or shock absorption devices to fix and protect the internal equipment and adapt to vibration and impact during transportation.

[0059] Optionally, the test unit housing 140 includes multiple isolated sub-chambers for housing power equipment, measuring equipment, and auxiliary equipment, respectively, to reduce mutual interference; or the test unit housing 140 adopts a pull-out structure, allowing the internal equipment to be pulled out with the drawer for easy maintenance and replacement. The test unit housing 140 can also share the same space with the cable management cavity 110, achieving functional integration through partitioned arrangement.

[0060] Combination Figure 5 In one embodiment, the bidirectional converter test equipment further includes an auxiliary heat dissipation mechanism 500, which is connected to the winding power structure 310.

[0061] Optionally, the auxiliary heat dissipation mechanism 500 includes a transmission switching assembly 510 and an auxiliary cooling fan 520. The cable winding power structure 310 includes a first motor with a first output terminal and a second output terminal. The first output terminal is connected to the cable management reel 200 via a clutch assembly 320, and the second output terminal is connected to the auxiliary cooling fan 520 via the transmission switching assembly 510. The clutch assembly 320 is used to control the power transmission or disconnection between the first output terminal of the first motor and the cable management reel 200, and the transmission switching assembly 510 is used to control the power transmission or disconnection between the second output terminal of the first motor and the auxiliary cooling fan 520.

[0062] Specifically, the first motor can be a dual-shaft extension motor, with its front extension shaft serving as the first output end and its rear extension shaft serving as the second output end. The first output end is connected to the rotating shaft of the cable tray 200 via a clutch assembly 320. The clutch assembly 320 transmits the torque of the first motor to the cable tray 200 during winding and automatically disconnects during unwinding, allowing the cable tray 200 to rotate freely. The second output end is connected to the input shaft of the auxiliary cooling fan 520 via a transmission switching assembly 510. The transmission switching assembly 510 includes a driving wheel, a driven wheel, a transmission component, and a switching clutch. The driving wheel is fixedly mounted on the second output end of the first motor, and the driven wheel is fixedly mounted on the input shaft of the auxiliary cooling fan 520. The transmission component connects the driving wheel and the driven wheel; the transmission component can be a transmission belt, transmission chain, or transmission gear, etc. The switching clutch is located between the driving wheel and the second output end of the first motor, or between the driven wheel and the input shaft of the auxiliary cooling fan 520, and is used to control the engagement or disengagement of power. The auxiliary cooling fan 520 can be installed inside the cable management cavity 110 or the test unit housing cavity 140. The airflow generated by the auxiliary cooling fan 520 during operation can flow through the test unit housing cavity 140.

[0063] When the testing equipment is in the cable winding stage, the switching clutch is disengaged, cutting off the power transmission between the second output of the first motor and the auxiliary cooling fan 520. The full power of the first motor is transmitted to the cable management reel 200 through the first output and clutch assembly 320, driving the reel 200 to rotate and wind up the cable 210. When the cable 210 is wound up and the measurement stage begins, the clutch assembly 320 is disengaged, cutting off the power transmission between the first output of the first motor and the cable management reel 200, leaving the reel 200 in a free state. Simultaneously, the switching clutch engages, establishing power transmission between the second output of the first motor and the auxiliary cooling fan 520. The first motor drives the auxiliary cooling fan 520 to rotate, providing auxiliary cooling for the equipment within the testing unit's accommodating cavity 140.

[0064] The switching clutch can be controlled manually or automatically by the controller. For example, the switching clutch is signal-connected to the controller, which is connected to the main control system of the testing equipment or has a built-in timing function. When it detects that no wire reeling action has been performed and the measurement state has been entered, the controller sends an engagement command to the switching clutch. When the wire reeling operation is performed, the controller first sends a disengagement command to the switching clutch. After confirming that the auxiliary cooling fan 520 has stopped, it then controls the clutch assembly 320 to engage, ensuring the correct power switching sequence and avoiding overload or power interference of the first motor caused by driving two loads simultaneously.

[0065] In some embodiments, the transmission switching assembly 510 further includes a speed-changing mechanism for adjusting the rotational speed of the auxiliary cooling fan 520 to adapt to different cooling requirements. When a larger airflow is required, a speed-increasing transmission can be used to make the auxiliary cooling fan 520 rotate at high speed; when quiet operation is required, a speed-reducing transmission can be used to reduce fan noise.

[0066] For example, the transmission switching assembly 510 includes a driving wheel, a driven wheel, a transmission component, a switching clutch, and a speed change mechanism. The driving wheel is fixedly mounted on the second output end of the first motor, and the driven wheel is fixedly mounted on the input end of the speed change mechanism. The output end of the speed change mechanism is connected to the input shaft of the cooling fan, and the transmission component connects the driving wheel and the driven wheel. The speed change mechanism can be a gearbox, a belt-type continuously variable transmission (CVT), or an electromagnetic slip-ring transmission. The switching clutch is located between the driving wheel and the second output end of the first motor, or between the driven wheel and the input end of the speed change mechanism. The power output from the first motor is transmitted sequentially through the switching clutch, the driving wheel, the transmission component, and the driven wheel to the speed change mechanism. The speed change mechanism adjusts the speed and drives the cooling fan to rotate. The speed change mechanism can be a multi-speed gearbox, using a shift fork to switch different gear pairs to achieve gear shifting; it can also be a mechanical continuously variable transmission, achieving stepless speed regulation by changing the working radius of the transmission components; or it can be an electromagnetic slip-ring transmission, changing the output speed by adjusting the excitation current.

[0067] In some embodiments, the transmission switching assembly 510 includes a driving pulley, a driven pulley, a transmission component, and a switching clutch. The driving pulley is fixedly mounted on the second output end of the first motor, and the driven pulley is fixedly mounted on the input shaft of the cooling fan. The transmission component connects the driving pulley and the driven pulley, and the transmission component can be a transmission belt, transmission chain, or transmission gear. The driving pulley and the driven pulley have different pitch circle diameters, and the ratio of their diameters determines the transmission ratio between the cooling fan and the first motor. By selecting combinations of driving and driven pulleys with different diameters, the cooling fan can achieve a rotational speed higher or lower than the speed of the first motor. For example, when a larger airflow is required, a combination with a driving pulley diameter larger than the driven pulley diameter is selected to achieve speed-increasing transmission; when fan noise needs to be reduced, a combination with a driving pulley diameter smaller than the driven pulley diameter is selected to achieve speed-reducing transmission. The driving and driven pulleys can be interchangeable, that is, the transmission ratio can be changed by replacing pulleys or gears of different diameters to adapt to different heat dissipation requirements. The switching clutch can be located between the driving pulley and the second output end of the first motor, or between the driven pulley and the input shaft of the cooling fan.

[0068] In some embodiments, the auxiliary heat dissipation mechanism 500 further includes a temperature sensor and a controller. The temperature sensor is disposed within the test unit housing cavity 140 for real-time detection of the internal temperature. The controller is connected to the temperature sensor and a switching clutch, and controls the engagement state of the switching clutch and the speed of the first motor according to the detected temperature. When the temperature is higher than a first set value, the controller controls the switching clutch to engage, the first motor drives the auxiliary cooling fan 520 to run, and adjusts the speed of the first motor according to the temperature to regulate the airflow; when the temperature is lower than a second set value, the controller controls the switching clutch to disengage, the auxiliary cooling fan 520 stops running, and the first motor is in standby mode. This control method achieves on-demand heat dissipation, ensuring the operating temperature of the equipment while saving energy.

[0069] In some other embodiments, the transmission switching assembly 510 may also be manually controlled, i.e., the power switching is achieved by the operator manually moving the clutch handle.

[0070] By incorporating the auxiliary cooling mechanism 500, the first motor in the take-up power structure 310 is reused as the drive source for the auxiliary cooling fan 520 during the measurement phase, eliminating the need for a separate motor for the cooling system. This fully utilizes the motor's idle time, improving equipment utilization and saving cost and space. Furthermore, the motor's operation itself generates heat; using this heat to drive the auxiliary cooling fan 520 allows for timely dissipation of localized heat, preventing heat accumulation that could affect the motor itself and other equipment.

[0071] In some embodiments, the bidirectional converter test equipment further includes an adaptive heat dissipation mechanism, which is disposed in the heat dissipation channel on the top or side wall of the test unit housing cavity 140. The adaptive heat dissipation mechanism is used to adjust the opening of the heat dissipation channel according to the temperature inside the test unit housing cavity 140, so as to realize heat dissipation on demand, improve heat dissipation efficiency, and reduce heat loss and dust intrusion.

[0072] Exemplarily, the adaptive heat dissipation mechanism includes a fixed plate, a movable partition, a drive assembly, and a temperature sensing assembly. The fixed plate is fixedly disposed at the opening of the heat dissipation channel on the top or side wall of the test unit receiving cavity 140, and has multiple ventilation holes or a grid structure. The movable partition is slidably disposed on one side of the fixed plate, parallel and fitted to the fixed plate, and has through holes or closed surfaces corresponding to the ventilation holes of the fixed plate. The drive assembly is connected to the movable partition and drives the movable partition to slide relative to the fixed plate, thereby changing the area of ​​the ventilation holes of the fixed plate that are covered. The temperature sensing assembly is disposed within the test unit receiving cavity 140 and is connected to the drive assembly, used to control the operation of the drive assembly based on the detected temperature.

[0073] When the temperature inside the test unit cavity 140 is low, the temperature sensing component controls the drive component to move the movable partition to a position that covers most or all of the ventilation holes, reducing internal and external air convection and preventing dust from entering and heat loss. When the temperature rises, the temperature sensing component controls the drive component to move the movable partition, increasing the opening of the ventilation holes, increasing the heat dissipation channel area, and promoting the discharge of hot air. The higher the temperature, the larger the opening, until it reaches the maximum opening, achieving automatic matching of heat dissipation and heat generation.

[0074] Exemplarily, the temperature sensing component includes a temperature bulb and a piston, and the driving component includes a push rod. The temperature bulb is fixedly disposed within the test unit receiving cavity 140, and the interior of the temperature bulb is filled with a thermally expanding medium, such as paraffin, alcohol, or liquid mercury, which have a high coefficient of thermal expansion. The piston is slidably sealed within the temperature bulb, and one end of the piston is fixedly connected to the push rod. The end of the push rod away from the piston is connected to a movable partition. When the temperature inside the test unit receiving cavity 140 rises, the medium inside the temperature bulb expands due to heat, pushing the piston to move. The piston, through the push rod, pushes the movable partition to slide, increasing the opening of the ventilation hole. When the temperature decreases, the medium contracts, and the movable partition slides in the opposite direction under the action of a return spring, decreasing the opening of the ventilation hole.

[0075] Optionally, the drive assembly may also include a return spring and a guide mechanism. The return spring is disposed between the movable partition and the fixed plate, providing a force opposite to the pushing force of the temperature sensing component, allowing the movable partition to automatically reset when the temperature decreases. The guide mechanism includes a guide rail and a slider. The guide rail is fixedly disposed on the side wall or top of the test unit receiving cavity 140, and the slider is fixedly connected to the movable partition and slides on the guide rail, ensuring smooth and stable movement of the movable partition.

[0076] In some embodiments, the adaptive heat dissipation mechanism may further include a manual adjustment device connected to the movable partition, for manual adjustment of the opening by an operator when automatic adjustment fails or forced heat dissipation is required. The manual adjustment device may be a pull cable, knob, or handle, etc., and is connected to the movable partition via a linkage mechanism.

[0077] Alternatively, the adaptive heat dissipation mechanism can also adopt a louvered structure, in which multiple rotatable blades replace the fixed plate and movable partition. The blades are linked by a linkage mechanism, and the temperature sensing component and the drive component drive the blades to rotate synchronously, changing the size of the gap between the blades.

[0078] Alternatively, the temperature sensing component can also be electrically controlled, that is, the temperature sensor works with the controller and electric actuator to achieve more precise temperature control.

[0079] Combination Figure 3 In one embodiment, the bidirectional converter testing equipment further includes a driven support carriage 600, which includes a support carriage body 610 and a clamping assembly 620 disposed above the support carriage body 610. The clamping assembly 620 is used to clamp and fix the cable 210. Multiple driven support carriages 600 are provided. When the length of the portion of the cable 210 outside the cable management cavity 110 is greater than a preset value, at least a portion of the driven support carriages 600 are located outside the cable management cavity 110. When the length of the portion of the cable 210 outside the cable management cavity 110 is less than or equal to the preset value, all the driven support carriages 600 are located inside the cable management cavity 110. The clamping assemblies 620 of the driven support carriages 600 located outside the cable management cavity 110 are connected to the cable 210; the clamping assemblies 620 of the driven support carriages 600 located inside the cable management cavity 110 are detached from the cable 210.

[0080] For example, the support vehicle 610 is a small platform with wheels that can move on the bottom surface of the cable management cavity 110 and the ground. The clamping assembly 620 can be a clamp with elastic claws or bolt clamping structure, capable of clamping and fixing the cable 210 above the support vehicle 610. In the initial state, all the driven support vehicles 600 are stored in the cable management cavity 110, and their clamping assemblies 620 are all in a released state and not connected to the cable 210.

[0081] As the tractor 400 begins to pull the cable 210 outwards, the cable 210 is gradually pulled out of the cable management cavity 110. With the increase in the exposed length of the cable 210, its suspended portion becomes longer and heavier. When the length of the portion of the cable 210 outside the cable management cavity 110 exceeds a preset value, the operator can remove the driven support cart 600 from the cable management cavity 110, place it under the cable 210, and fix the clamping assembly 620 to the cable 210. As the length of the portion of the cable 210 outside the cable management cavity 110 increases, each driven support cart 600 can be removed one by one and connected to the cable 210, so that each driven support cart 600 supports a section of the cable 210. Multiple driven support carts 600 are spaced apart along the length of the cable 210, sharing the weight of the cable 210. This prevents the cable 210 from sag and dragging on the ground due to its own weight during long-distance deployment, thus avoiding wear on the cable sheath and reducing traction resistance.

[0082] The above preset values ​​can be set according to the stiffness of the cable 210 and the allowable sag. For example, the preset value is 5m, which means that when the exposed length of the cable 210 reaches 5m, the first driven support vehicle 600 needs to be placed, and a driven support vehicle 600 is arranged every 5m.

[0083] When the test is completed and the cable 210 is wound up, as the cable 210 is gradually pulled back into the cable management cavity 110, the driven support cart 600 sequentially reaches the vicinity of the inlet / outlet 120. The operator releases the clamping assembly 620 and pushes the driven support cart 600 back into the cable management cavity 110 for storage. By setting up multiple driven support carts 600, reliable support for the long-distance cable 210 is achieved, ensuring the safety and stability of the cable 210 during the laying process. At the same time, it avoids the fatigue of manually holding the cable 210 for a long time, making the cable 210 laying more standardized and professional.

[0084] Combination Figure 6 and Figure 7 ,in, Figure 6 The dashed lines represent internal lines. In one embodiment, the bidirectional converter test equipment further includes a storage box 700 and a conveying device 800. The storage box 700 is fixed to the container 100 and has a pick-and-place port 710 and a storage cavity, with the pick-and-place port 710 connecting the inside and outside of the storage cavity. The conveying device 800 is used to convey the driven support carts 600 located in the storage cavity one by one to the pick-and-place port 710, or to convey the driven support carts 600 located in the pick-and-place port 710 into the storage cavity.

[0085] For example, the storage box 700 can be fixed to the side wall or bottom plate of the cable management cavity 110, and its internal storage cavity is used to centrally store multiple driven support carts 600. The retrieval port 710 facilitates the operator's retrieval and placement of the driven support carts 600 within the cable management cavity 110. The conveying device 800 can use a chain conveyor, belt conveyor, or turntable conveyor to neatly arrange the driven support carts 600 within the storage cavity. When it is necessary to lay the cable 210 outward, the conveying device 800 delivers a driven support cart 600 to the retrieval port 710, where the operator retrieves it and secures it below and to the cable 210; when the cable 210 is retrieved, the operator returns the driven support cart 600 to the retrieval port 710, and the conveying device 800 transports it back to an empty space within the storage cavity.

[0086] By cooperating with the storage box 700 and the conveying device 800, the passive support cart 600 is centrally stored and supplied on demand, avoiding the chaos caused by the passive support cart 600 being randomly piled up in the cable management cavity 110. It also saves the trouble of manually carrying and searching for each one, further improving the automation level of cable 210 laying and recycling, reducing the auxiliary workload of on-site personnel, and making the operation process smoother.

[0087] In one embodiment, the conveying device 800 includes a conveying tray 810 and a rotary drive assembly 820. The conveying tray 810 is rotatably disposed within a storage box 700, and has multiple storage positions above it, which are evenly arranged along the circumference of the conveying tray 810. Each storage position is used to store a driven support cart 600. The rotary drive assembly 820 is connected to the conveying tray 810 and is used to drive the conveying tray 810 to rotate, so that the multiple storage positions are alternately moved one by one to a position opposite to the pick-up / drop-off port 710.

[0088] For example, the conveyor tray 810 is a horizontally positioned disc, its center rotatably connected to the bottom or top plate of the storage box 700 via bearings. Multiple grooves or positioning bosses are evenly distributed circumferentially on the upper surface of the conveyor tray 810, each groove or boss forming a storage position where the driven support cart 600 can be placed, its wheels embedded in the grooves to prevent slippage. The rotary drive assembly 820 includes a second motor and a reducer, the output shaft of the second motor being driven by a gear or friction wheel to the edge or central shaft of the conveyor tray 810. When the second motor drives the conveyor tray 810 to rotate, each storage position sequentially passes the position of the pick-up / drop-off port 710. For example, when the driven support cart 600 needs to be retrieved, the operator presses the start button, and the second motor drives the conveyor tray 810 to rotate by an angle, aligning the next storage position with the pick-up / drop-off port 710, placing the driven support cart 600 in a position easily accessible for retrieval. When storage is required, rotate the empty storage slot to the pick-up / drop-off port 710, place the driven support 600 in, and then rotate it again to align the next empty slot.

[0089] This rotary conveyor structure makes full use of the space inside the storage box 700, allowing multiple driven support cars 600 to be stored in an orderly manner with fixed positions for retrieval, making storage and retrieval convenient and quick, and also facilitating counting and management.

[0090] In one embodiment, the conveying device 800 further includes a locking component 830, and multiple locking components 830 are provided corresponding to the storage positions. The locking components 830 are used to releasably lock the driven support vehicle 600 in the corresponding storage position.

[0091] For example, each storage position is provided with a locking component 830. When the driven support cart 600 is placed in the storage position, the locking component 830 automatically or manually locks it to prevent the driven support cart 600 from slipping or shifting off the storage position due to vibration, bumps, or centrifugal force during the rotation of the conveyor tray 810 or during the transportation of the entire container 100. The locking component 830 may be in the form of a spring-driven latch, magnetic attraction, elastic gripper, etc. When the storage position rotates to the access port 710, the locking component 830 is unlocked, allowing the driven support cart 600 to be easily removed; when the driven support cart 600 is returned to the storage position, the locking component 830 locks again.

[0092] By setting the locking component 830, the position of the driven support vehicle 600 is ensured to be stable during storage and transportation, avoiding equipment damage, personal injury or operation interruption caused by accidental detachment, and improving the reliability and safety of the system.

[0093] Combination Figure 8In one embodiment, the locking assembly 830 includes a locking pin 831, a resilient reset member 832, and a pressure rod 833. The locking pin 831 is horizontally slidably connected to the conveyor tray 810, and one end of the locking pin 831 is used for locking into the driven support carriage 600. The locking pin 831 has a tapered surface. The resilient reset member 832 connects the conveyor tray 810 and the locking pin 831, and the resilient reset member 832 is used to tend to move the locking pin 831 toward the locked position. The pressure rod 833 is slidably connected to the conveyor tray 810 in a vertical direction, and the lower side of the pressure rod 833 is in sliding contact with the tapered surface. The storage box 700 is provided with a pressing protrusion 720. The pressing protrusion 720 is configured such that when the storage position rotates with the conveyor plate 810 to a position opposite to the pick-up and drop-out port 710, the pressing protrusion 720 presses down on the pressure rod 833 of the locking component 830 corresponding to the storage position, pushing the locking pin 831 to move to the unlocked position against the force of the elastic reset member 832, so that the locking pin 831 disengages from the driven support vehicle 600.

[0094] For example, the locking pin 831 is horizontally positioned above the conveyor tray 810 and is slidably connected to the conveyor tray 810 via a first slide block above the conveyor tray 810. One end of the locking pin 831 can be inserted into a locking hole in the bottom or side wall of the driven support vehicle 600. The locking pin 831 has a tapered shoulder in the middle, and the side of the shoulder near the driven support vehicle 600 forms a tapered surface. The elastic reset member 832 can be a compression spring fitted onto the locking pin 831. One end of the compression spring abuts against the first slide block on the conveyor tray 810, and the other end abuts against the shoulder end face on the locking pin 831, always providing elastic force to the locking pin 831 in the locking direction. The pressure rod 833 is vertically positioned and is slidably connected to the conveyor tray 810 via a second slide block above the conveyor tray 810. Its lower end fits against the tapered surface of the locking pin 831, and its upper end extends out of the upper surface of the second slide block. A downward protruding pressing protrusion 720 is fixedly installed on the inner wall of the storage box 700 near the retrieval port 710. The lower surface of the pressing protrusion 720 is arc-shaped, and the position of the pressing protrusion 720 corresponds exactly to the pressing rod 833 that reaches the storage position of the retrieval port 710.

[0095] When the storage position has not reached the retrieval port 710, the pressure rod 833 is not compressed, and the elastic reset member 832 pushes the locking pin 831 out, inserting it into the lock hole of the driven support carriage 600 to achieve locking. When the storage position rotates with the conveyor tray 810 to the retrieval port 710, the pressure rod 833 moves exactly below the pressing protrusion 720. The pressing protrusion 720 presses down on the pressure rod 833, causing the pressure rod 833 to move downwards in the vertical direction. During the downward movement of the pressure rod 833, its lower end pushes the shoulder of the locking pin 831, causing the locking pin 831 to overcome the elastic force of the elastic reset member 832 and retract backwards, thereby disengaging from the lock hole of the driven support carriage 600 and achieving automatic unlocking. At this time, the operator can remove the driven support carriage 600 without hindrance. When the storage position leaves the retrieval port 710, the pressure rod 833 separates from the pressing protrusion 720 and is no longer under pressure. The elastic reset member 832 pushes the locking pin 831 forward to reset, and at the same time, the locking pin 831 pushes the pressure rod 833 upward through the conical surface, so that the pressure rod 833 automatically rises and resets, waiting for the next locking.

[0096] The locking component 830 of this embodiment can automatically unlock at the pick-up / drop-off port 710 and automatically lock at other locations without the need for sensors, motors, or electromagnets. It has a simple and reliable structure, extremely low cost, and rapid response.

[0097] In one embodiment, the cable 210 includes multiple parallel sub-lines; the cable tray 200 is provided with multiple winding grooves, each winding groove is wound with one sub-line; the clamping assembly 620 includes multiple clamping units arranged side by side, each clamping unit is used to clamp one sub-line; the tractor 400 is connected to one end of each sub-line at the same time.

[0098] For testing high-power bidirectional converters, it is often necessary to connect multiple cables 210 with different functions at the same time, such as positive power line, negative power line, protective grounding line, signal control line, communication optical fiber, etc. These cables 210 are collectively referred to as sub-lines.

[0099] In this embodiment, multiple annular grooves, i.e., winding grooves, are formed on the circumferential surface of the cable management reel 200. These winding grooves are arranged sequentially along the axial direction of the cable management reel 200. Each winding groove is used to independently wind one sub-wire. The sub-wires are arranged in sections on the cable management reel 200, without contact or interference with each other. The clamping assembly 620 includes a clamping seat with multiple clamping units arranged side-by-side. Each clamping unit corresponds to one sub-wire. The clamping unit can be an independent elastic claw, a wire clamping bolt, or a quick-locking structure, etc. Each clamping unit clamps its corresponding sub-wire, maintaining a fixed relative position for each sub-wire on the supporting vehicle body 610, preventing them from tangling or crossing. A cable collector is provided at the rear end of the tractor 400, gathering and fixing the ends of all sub-wires together to form a single, integrated wire harness end. When the tractor 400 moves outward, all sub-wires are simultaneously pulled out of the cable management reel 200, neatly arranged, and directly corresponding to the terminals of the bidirectional converter under test, eliminating the need for on-site arrangement. During winding, the cable management reel 200 rotates, and each sub-cable is individually wound into its respective winding slot, preventing tangling and knotting. This multi-line parallel design meets the needs of high-power testing for multiple cables 210, combining the laying and retrieval of multiple cables 210 into a single operation, greatly improving efficiency while ensuring the standardization of cable arrangement and reducing the possibility of wiring errors.

[0100] Optionally, one end of the cable 210 is wound around the cable management reel 200 and fixedly connected to the reel 200. The cable management reel 200 is provided with terminals that are respectively connected to each cable 210. The terminals can be connected to the functional units required for testing via connecting wires. It is understood that when the cable management reel 200 rotates, the end of the cable 210 wound around the cable management reel 200 also rotates around the rotation axis of the cable management reel 200. Therefore, it is difficult to directly connect that end of the cable 210 to the functional units required for testing. However, this problem can be avoided by using terminals and connecting wires. Specifically, when winding or unwinding the cable 210, the connection between the connecting wire and the terminal can be disconnected to prevent the connecting wire from twisting and tangling due to the rotation of the cable management reel 200. When performing on-site debugging and status verification, the connecting wire can be connected to the terminal, thereby achieving an indirect connection between the cable 210 and the functional units required for testing.

[0101] Combination Figure 4In one embodiment, the clutch assembly 320 includes a permanent magnet coupler and a one-way bearing 323. The permanent magnet coupler includes a driving rotor 321 and a driven rotor 322. The driving rotor 321 is connected to the output end of the take-up power structure 310, and the driven rotor 322 is connected to the shaft of the cable reel 200. Torque is transmitted between the driving rotor 321 and the driven rotor 322 through magnetic coupling. The one-way bearing 323 is disposed between the driven rotor 322 and the shaft of the cable reel 200. The one-way bearing 323 is configured such that: when the take-up power structure 310 drives the winding, the one-way bearing 323 is in a locked state, transmitting the torque of the driven rotor 322 to the shaft of the cable reel 200; when the cable 210 is pulled and unwound, the one-way bearing 323 allows the shaft of the cable reel 200 to rotate freely relative to the driven rotor 322.

[0102] For example, the active rotor 321 of the permanent magnet coupler can be a copper or aluminum conductor disk, fixedly mounted on the output shaft of the take-up power structure 310 (such as a motor); the driven rotor 322 can be a steel disk embedded with permanent magnets, fixedly connected to the outer or inner ring of the one-way bearing 323. An air gap exists between the active rotor 321 and the driven rotor 322, with no direct mechanical contact. When the take-up power structure 310 drives the active rotor 321 to rotate, the active rotor 321 cuts the magnetic field of the driven rotor 322, generating eddy currents inside the active rotor 321. The induced magnetic field generated by the eddy currents interacts with the permanent magnetic field of the driven rotor 322, thereby driving the driven rotor 322 to rotate synchronously. This magnetic coupling method has soft-start and overload protection characteristics when transmitting torque: when the load is too large, slippage will occur between the active rotor 321 and the driven rotor 322, preventing damage to the motor. The one-way bearing 323 is a type of bearing that can only transmit torque in one direction. Its inner ring is fixed to the shaft of the cable reel 200, and its outer ring is fixed to the driven rotor 322. When the take-up power structure 310 drives the driven rotor 322 to rotate in the take-up direction, the inner and outer rings of the one-way bearing 323 are relatively stationary and in a locked state. The torque of the driven rotor 322 is transmitted to the shaft of the cable reel 200, causing the cable reel 200 to rotate and take up the cable. When the cable 210 is pulled and unwound, the shaft of the cable reel 200 rotates in the unwinding direction. At this time, the inner ring of the one-way bearing 323 rotates in the overrunning direction relative to the outer ring. The one-way bearing 323 is in an overrunning state, meaning that the inner ring can rotate freely without driving the outer ring. Therefore, the rotation of the shaft of the cable reel 200 is not transmitted to the driven rotor 322. The driven rotor 322 can remain stationary or rotate slowly with its own inertia, without generating resistance to unwinding.

[0103] This clutch assembly 320 enables automatic switching between winding and unwinding states: it automatically engages to transmit power during winding and automatically disengages to eliminate resistance during unwinding, requiring no manual operation or electronic control intervention. It has a simple structure, high reliability, and due to the non-contact characteristics of the permanent magnet coupler, the entire mechanism is almost wear-free and has a long service life.

[0104] In other embodiments, the clutch assembly 320 includes a sliding sleeve and a shift fork. The sliding sleeve is axially slidably mounted on the output shaft of the take-up power structure 310 via a keyway structure. The inner hole of the sliding sleeve is circumferentially fixed and axially slidably connected to the output shaft via a spline or flat key. An annular groove is provided on the outer circumference of the sliding sleeve. One end of the shift fork mates with the annular groove, and the middle part of the shift fork is rotatably mounted in the cable management cavity 110. The other end of the shift fork is connected to an operating handle or a drive device. The rotating shaft end of the cable management reel 200 is provided with engaging teeth that mate with the end of the sliding sleeve.

[0105] When cable 210 needs to be wound up, the operating handle or drive device drives the fork to swing. The fork pushes the sliding sleeve to slide along the output axis towards the cable management disc 200, so that the engaging teeth at the end of the sliding sleeve mesh with the engaging teeth at the end of the rotating shaft of the cable management disc 200. The output shaft of the winding power structure 310 is connected to the cable management disc 200. When unwinding or when the cable management disc 200 needs to rotate freely, the fork swings in the opposite direction, pulling the sliding sleeve away from the rotating shaft of the cable management disc 200, and the transmission between them is disconnected.

[0106] The engaging teeth can adopt an end-face tooth structure, where the end face of the sliding sleeve and the end face of the rotating shaft of the cable tray 200 are respectively provided with mutually mating end-face teeth. The tooth shape is rectangular or trapezoidal, which transmits large torque during engagement and has no interference during disengagement. Alternatively, a claw clutch structure can be used, with claw teeth at the end of the sliding sleeve and corresponding claw grooves at the end of the rotating shaft of the cable tray 200. The engaging teeth can also adopt a toothed clutch structure with helical teeth, which has a self-locking function to prevent automatic disengagement during torque transmission.

[0107] Optionally, the drive unit uses an electric push rod or a hydraulic cylinder, and the controller automatically controls the movement of the shift fork to achieve remote automated operation. The telescopic end of the electric push rod is connected to the shift fork. When a take-up command is received, the electric push rod extends to push the shift fork to engage the sliding sleeve; when a release command is received or power is cut off, the electric push rod retracts to disengage the sliding sleeve.

[0108] Optionally, a rolling bearing that mates with the shift fork is provided in the annular groove of the sliding sleeve to reduce friction and wear. The operating handle of the shift fork can extend to the outside of the cable management cavity 110 for easy manual operation on site.

[0109] The clutch assembly 320 in this embodiment has a simple and reliable structure, low manufacturing cost, and convenient maintenance. It can reliably connect and completely disconnect the cable reel power structure 310 and the cable management reel 200, meet the requirements of high torque transmission, and is suitable for testing devices of various power levels.

[0110] Combination Figure 9In one embodiment, the bidirectional converter test equipment further includes a damping mechanism 900, which is connected to the cable management disk 200 and is used to provide rotational damping to the cable management disk 200.

[0111] The rotational damping provided by the damping mechanism 900 to the cable tray 200 can reduce the over-rotation of the cable tray 200 due to inertia when the cable drive mechanism 300 stops driving the cable tray 200 to rotate and the tractor 400 stops pulling the cable tray 200 to rotate, thus preventing the cable 210 from coming loose when traction stops.

[0112] In one embodiment, the damping mechanism 900 includes a damping disk 910, a damping adjustment frame 920, a permanent magnet damping block 930, and an adjustment drive 940. The damping disk 910 is fixedly mounted on the rotating shaft of the cable management disk 200 and is made of a conductive material. The damping adjustment frame 920 is slidably disposed within the cable management cavity 110. The permanent magnet damping block 930 is mounted on the damping adjustment frame 920, and an air gap exists between the permanent magnet damping block 930 and the damping disk 910. The adjustment drive 940 is connected to the damping adjustment frame 920 and is used to drive the damping adjustment frame 920 to move and adjust the size of the air gap.

[0113] For example, the damping disc 910 is a copper or aluminum disc, coaxially fixed to the winding disc 200, and rotates together with the winding disc 200. The permanent magnet damping block 930 includes one or more permanent magnets, mounted on the damping adjustment frame 920, with its magnetic poles facing the damping disc 910. When the winding disc 200 rotates during unwinding, the damping disc 910 rotates accordingly, cutting the magnetic field lines generated by the permanent magnet damping block 930. According to the law of electromagnetic induction, eddy currents are generated inside the damping disc 910. These eddy currents are subjected to Lorentz force in the magnetic field, forming a damping torque opposite to the direction of rotation, which hinders the winding disc 200 from continuing to rotate. The magnitude of this damping torque is related to the magnetic induction intensity, the rotational speed of the damping disc 910, and the distance between the permanent magnet damping block 930 and the damping disc 910.

[0114] The adjusting drive component 940 can be a manually operated knob-driven lead screw mechanism or an electric push rod, etc. By changing the position of the damping adjustment bracket 920, the permanent magnet damping block 930 is moved closer to or further away from the damping disk 910, thereby changing the width of the air gap. The smaller the air gap, the stronger the magnetic induction intensity, and the greater the damping torque generated; the larger the air gap, the smaller the damping torque.

[0115] In practical applications, the appropriate air gap can be pre-adjusted according to factors such as the weight of the cable 210 and the unwinding speed, so that the damping torque can just offset the over-rotation of the cable reel 200 due to inertia, preventing the cable 210 from continuing to loosen when traction stops, which would cause the cable 210 to become loose, knotted, or piled up on the ground.

[0116] The non-contact design of the damping disc 910 and the permanent magnet damping block 930 avoids mechanical friction, preventing wear and dust. Furthermore, the damping torque is proportional to the rotational speed, meaning that the damping is greater at high speeds and less at low speeds. This characteristic perfectly meets the physical requirements of the unwinding process: providing sufficient damping to suppress inertia during rapid unwinding and less damping during slow unwinding or when stopped, without affecting traction and positioning.

[0117] Optionally, the damping mechanism 900 also includes a speed sensor and a controller. The speed sensor is located at the shaft of the cable tray 200 and is used to detect the real-time speed of the cable tray 200. The controller is connected to both the speed sensor and the adjustment drive 940, and is configured to adjust the action of the adjustment drive 940 according to the real-time speed.

[0118] For example, the speed sensor can be a rotary encoder or a Hall sensor to measure the angular velocity of the shaft of the cable tray 200 in real time and convert the speed signal into an electrical signal to be transmitted to the controller. The controller can be a PLC or a microcontroller with a built-in damping control algorithm. It can calculate the required target damping torque based on the real-time speed, determine the required air gap size based on the correspondence between the air gap and the damping torque, and then send a command to the adjustment drive 940 to drive the damping adjustment bracket 920 to move, change the air gap, and make the actual damping torque follow the target value in real time.

[0119] For example, the controller is configured to: when the speed of the cable tray 200 increases based on the detection results of the speed sensor, control the adjustment drive 940 to increase the air gap. Since the damping torque is proportional to the speed, the damping increases when the speed is high. Therefore, when the speed of the cable tray 200 is large, it is necessary to increase the air gap and reduce the damping torque to control the damping within a reasonable range, avoid excessive tension on the cable 210, prevent damage to the cable tray 200, cable 210 or tractor 400, and at the same time provide a certain damping torque to prevent loosening.

[0120] The controller is configured to: when the rotational speed of the cable tray 200 decreases based on the detection results of the speed sensor, control the adjustment drive 940 to reduce the air gap. Since the damping torque is proportional to the rotational speed, the damping is small when the rotational speed is low. Therefore, in order to avoid the cable 210 from becoming loose due to insufficient damping, the controller controls the adjustment drive 940 to reduce the air gap, thereby ensuring sufficient damping torque and preventing the cable 210 from becoming loose.

[0121] This closed-loop control enables dynamic adaptive adjustment of the damping torque. Regardless of the speed changes of the tractor 400, the cable 210 maintains a suitable tension, preventing excessive damping that could increase the traction load or damage the equipment, nor insufficient damping that could cause it to loosen. This intelligent control further enhances the automation level of the cable 210 deployment system, enabling it to better adapt to complex and changing field conditions and ensuring a smooth and reliable cable 210 deployment process.

[0122] In another embodiment, the damping mechanism 900 includes a friction disc, a friction block, an elastic clamping assembly, and an adjusting assembly; the friction disc is fixedly mounted on the rotating shaft of the cable management disc 200, and the friction disc has a friction surface; the friction block is movably mounted within the cable management cavity 110 and is positioned opposite to the friction surface; the elastic clamping assembly is connected to the friction block and is used to apply an elastic force toward the friction surface to the friction block so that the friction block and the friction surface make elastic contact; the adjusting assembly is connected to the elastic clamping assembly and is used to adjust the preload of the elastic clamping assembly to change the normal pressure between the friction block and the friction surface.

[0123] For example, the friction disc can be made of cast iron or hardened steel, and its friction surface is a finely machined smooth plane or a plane with a specific pattern to provide a stable coefficient of friction. The friction block can be made of wear-resistant materials, such as copper-based powder metallurgy friction materials, asbestos rubber friction materials, or semi-metallic friction materials, to ensure slow wear and a stable coefficient of friction during long-term friction. The friction block is mounted on the side wall or bracket of the cable management cavity 110 by a guiding mechanism such as a slide rail, and can slide in a direction perpendicular to the axis of the friction disc.

[0124] The elastic clamping assembly includes a clamping spring, a spring seat, and a guide rod. The clamping spring is a cylindrical helical compression spring, with one end abutting against the spring seat and the other end abutting against the back of the friction block. The spring seat is fixed to the output end of the adjusting assembly. One end of the guide rod is fixedly connected to the friction block, and the other end slides through the spring seat to ensure directional stability when the friction block moves and stability when the spring is compressed. The elastic clamping assembly converts the elastic force of the clamping spring into a normal force between the friction block and the friction disc, thereby generating a frictional torque when the two move relative to each other. This frictional torque is the damping torque acting on the rotating shaft of the cable tray 200.

[0125] The adjustment assembly can employ various structural forms to adjust the preload. For example, the adjustment assembly includes an adjusting screw, an adjusting nut, and an adjusting handle. The adjusting screw is rotatably mounted on the side wall or bracket of the cable handling cavity 110, with its axis parallel to the direction of movement of the friction block. The adjusting nut is threaded into the adjusting screw and fixedly connected to the spring seat. The adjusting handle is fixed to the outer end of the adjusting screw, extending to a position for easy operation. When the operator turns the adjusting handle, the adjusting screw rotates, causing the adjusting nut to move axially along the screw, thereby changing the position of the spring seat and thus changing the compression of the compression spring, achieving adjustment of the preload. The greater the preload, the greater the normal pressure between the friction block and the friction disc, and the greater the damping torque generated at the same rotational speed; conversely, the smaller the preload, the smaller the damping torque. This manual adjustment method is simple in structure and low in cost. Operators can flexibly adjust the damping magnitude according to the actual conditions such as the weight of the cable 210 and the unwinding speed to achieve a better damping effect.

[0126] In another alternative, the adjustment assembly can also employ an electric actuator. For example, the adjustment assembly may include a telescopic component, which can be a linear motor, an electric actuator, or a servo cylinder. The housing of the telescopic component is fixed to the side wall or bracket of the cable management cavity 110, and its telescopic end is fixedly connected to a spring seat. The magnitude of the preload can be adjusted by the telescopic movement of the component.

[0127] Optionally, the damping mechanism 900 also includes a controller and a damping torque sensor. The damping torque sensor is used to detect the damping torque between the friction block and the friction disc. For example, the damping torque sensor can be a strain gauge torque sensor, attached to the force-bearing part of the friction block or friction disc. The controller is electrically connected to both the damping torque sensor and the telescopic component. The controller controls the extension and retraction of the telescopic component based on the detection signal from the damping torque sensor. By controlling the extension and retraction of the telescopic component, the compression of the compression spring can be precisely adjusted, thereby automatically changing the preload. This electric adjustment method facilitates real-time adjustment of the actual damping torque based on the output signal of the damping torque sensor, achieving more precise damping control.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bidirectional converter testing device, characterized in that, include: The container (100) has a cable management cavity (110). The container (100) has an inlet / outlet (120) and a door (130) on one side. The inlet / outlet (120) connects the cable management cavity (110) to the outside space, and the door (130) is used to open and close the inlet / outlet (120). A cable tray (200) is rotatably disposed inside the cable cavity (110), and a cable (210) is wound around the outside of the cable tray (200). The take-up drive mechanism (300) includes a take-up power structure (310) and a clutch assembly (320). The take-up power structure (310) is connected to the cable tray (200) through the clutch assembly (320). The take-up power structure (310) is used to drive the cable tray (200) to rotate and take up the cable (210). The clutch assembly (320) is used to connect or disconnect the output end of the take-up power structure (310) from the cable tray (200). A tractor (400) is installed in the cable management cavity (110) and connected to one end of the cable (210). The tractor (400) is used to pull the cable (210) toward the bidirectional converter under test.

2. The bidirectional converter testing equipment according to claim 1, characterized in that, Also includes: Driven support vehicle (600), the driven support vehicle (600) includes a support vehicle body (610) and a clamping assembly (620) disposed above the support vehicle body (610), the clamping assembly (620) is used to clamp and fix the cable (210), and multiple driven support vehicles (600) are provided; Wherein, when the length of the portion of the cable (210) outside the cable management cavity (110) is greater than a preset value, at least a portion of the driven support vehicle (600) is located outside the cable management cavity (110); when the length of the portion of the cable (210) outside the cable management cavity (110) is less than or equal to the preset value, all of the driven support vehicles (600) are located inside the cable management cavity (110). The clamping assembly (620) of the driven support vehicle (600) located outside the cable management cavity (110) is connected to the cable (210); the clamping assembly (620) of the driven support vehicle (600) located inside the cable management cavity (110) is disconnected from the cable (210).

3. The bidirectional converter testing equipment according to claim 2, characterized in that, Also includes: A storage box (700) is fixed to the container (100). The storage box (700) has an access port (710) and a storage cavity. The access port (710) communicates with the inside and outside of the storage cavity. A conveying device (800) is used to convey the driven support carts (600) located in the storage cavity one by one to the pick-up and drop-off port (710), or to convey the driven support carts (600) located in the pick-up and drop-off port (710) into the storage cavity.

4. The bidirectional converter testing equipment according to claim 3, characterized in that, The conveying device (800) includes: A conveyor tray (810) is rotatably disposed within the storage box (700). The conveyor tray (810) has multiple storage positions above it, which are evenly arranged around the circumference of the conveyor tray (810). Each storage position is used to store one of the driven support vehicles (600). A rotary drive assembly (820) is connected to the conveyor disk (810). The rotary drive assembly (820) is used to drive the conveyor disk (810) to rotate so that the plurality of storage positions are alternately moved one by one to a position opposite to the pick-and-place port (710).

5. The bidirectional converter testing equipment according to claim 4, characterized in that, The conveying device (800) further includes: A locking component (830) is provided in multiple ways corresponding to the storage position. The locking component (830) is used to release the driven support vehicle (600) in the corresponding storage position.

6. The bidirectional converter testing equipment according to claim 5, characterized in that, The locking component (830) includes: A locking pin (831) is horizontally slidably connected to the conveyor plate (810), and one end of the locking pin (831) is used to be inserted and locked with the driven support vehicle (600). The locking pin (831) is provided with a tapered surface. An elastic reset member (832) connects the conveyor tray (810) and the locking pin (831), the elastic reset member (832) being used to give the locking pin (831) a tendency to move toward the locking position; The pressure rod (833) is slidably connected to the conveyor plate (810) in the vertical direction, and the lower side of the pressure rod (833) is in sliding contact with the conical surface; The storage box (700) is provided with a pressing protrusion (720). The pressing protrusion (720) is configured such that when the storage position rotates with the conveyor plate (810) to a position opposite to the pick-up and put-out port (710), the pressing protrusion (720) presses down on the pressure rod (833) of the locking component (830) corresponding to the storage position, pushing the locking pin (831) to move to the unlocked position against the force of the elastic reset member (832), so that the locking pin (831) disengages from the driven support vehicle (600).

7. The bidirectional converter testing equipment according to claim 2, characterized in that, The cable (210) includes multiple sub-wires arranged in parallel; The wire management disc (200) is provided with a plurality of winding grooves, and each winding groove is wound with one of the sub-wires; The clamping assembly (620) includes a plurality of clamping units arranged side by side, each clamping unit being used to clamp one of the sub-wires; The tractor (400) is simultaneously connected to one end of each of the sub-lines.

8. The bidirectional converter testing equipment according to any one of claims 1 to 7, characterized in that, The clutch assembly (320) includes: A permanent magnet coupler, comprising an active rotor (321) and a driven rotor (322), wherein the active rotor (321) is connected to the output end of the take-up power structure (310), and the driven rotor (322) is connected to the shaft of the wire feeding disc (200), and the active rotor (321) and the driven rotor (322) transmit torque through magnetic coupling; A one-way bearing (323) is disposed between the driven rotor (322) and the shaft of the cable tray (200). The one-way bearing (323) is configured such that when the take-up power structure (310) drives the winding, the one-way bearing (323) is locked and transmits the torque of the driven rotor (322) to the shaft of the cable tray (200); when the cable (210) is pulled and unwound, the one-way bearing (323) allows the shaft of the cable tray (200) to rotate freely relative to the driven rotor (322).

9. The bidirectional converter testing equipment according to claim 8, characterized in that, Also includes: A damping mechanism (900) is connected to the cable tray (200) and is used to provide rotational damping to the cable tray (200).

10. The bidirectional converter testing equipment according to claim 9, characterized in that, The damping mechanism (900) includes: A damping disc (910) is fixedly mounted on the rotating shaft of the cable management disc (200), and the damping disc (910) is made of conductive material; The damping adjustment bracket (920) is slidably disposed within the cable management cavity (110); A permanent magnet damping block (930) is installed on the damping adjustment frame (920), and there is an air gap between the permanent magnet damping block (930) and the damping disk (910); Adjustment drive (940) is connected to the damping adjustment frame (920) for driving the damping adjustment frame (920) to move and adjust the size of the air gap.

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