Power switch conversion device suitable for electromagnetic compatibility test of feed network equipment
By designing a power switching conversion device suitable for feeder equipment, the problems of insufficient power capacity and resource waste in electromagnetic compatibility testing of feeder equipment were solved, realizing safe and efficient power switching and testing, and improving power grid stability and equipment safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-03-03
AI Technical Summary
In existing technologies, bipolar power supplies are required for electromagnetic compatibility testing of grid feeder equipment. However, the reverse power capacity is small and cannot meet the power supply needs of high-power equipment. Furthermore, replacing unipolar power supplies with bipolar power supplies results in significant resource waste, high power supply replacement costs, and impacts grid stability and equipment safety.
A power switching conversion device is designed, which includes unipolar and bipolar power supplies. A thyristor detects reverse current and cuts off the circuit. A DC-DC converter stores the reverse current. A filter purifies the power supply. A moving rod and a commutator block realize power switching and cooling. A controller monitors and adjusts the circuit, reducing the risk of manual operation and resource waste.
This technology enables the connection of multiple power supplies without increasing cable laying, improving testing efficiency and safety, reducing circuit modification costs, ensuring circuit safety and power grid stability, saving resources, and enhancing automation and testing accuracy.
Smart Images
Figure CN223967797U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electromagnetic compatibility testing technology, specifically a power switch conversion device suitable for electromagnetic compatibility testing of feeder equipment. Background Technology
[0002] Electromagnetic compatibility (EMC) testing is a core component in ensuring the stable operation of electronic equipment in complex electromagnetic environments. This is especially true for feeder equipment directly connected to the power grid (such as charging piles and industrial frequency converters), where conducted interference, radiated emissions, and immunity performance directly affect the stability of the power grid and the reliability of the equipment.
[0003] However, electromagnetic compatibility (EMC) testing of feeder equipment typically requires the use of bipolar power supplies. Bipolar power supplies often have low reverse power capacity, which cannot meet the power supply needs of high-power equipment not connected to the feeder network. To meet the power supply needs of high-power equipment not connected to the feeder network, two power supplies are generally used: one unipolar and one bipolar, each using a separate circuit. This requires significant time and manpower for circuit replacement. Equipment operating in feeder network functions is often directly connected to mains power, and the purity of the power supply cannot be guaranteed to meet EMC testing requirements. Furthermore, this can affect the electrical safety of other equipment connected to mains power, and there are strict requirements for feeder power, which cannot reach the full power output level of the feeder equipment. Currently, most EMC laboratories lack dedicated power supply equipment for feeder devices. Using unipolar power supplies in feeder network testing can cause power supply errors or even damage the power supply, affecting the normal operation of the power grid. Replacing existing unipolar power supplies with bipolar power supplies leads to resource waste, low utilization of the unipolar power supplies in the original locations, and high costs associated with re-laying circuits for both power supplies. Therefore, this invention designs a power switch conversion device suitable for EMC testing of feeder equipment to solve the above problems. Utility Model Content
[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a power switch conversion device suitable for electromagnetic compatibility testing of feeder equipment, which effectively solves the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a power switch conversion device suitable for electromagnetic compatibility testing of feeder equipment, comprising a ground, a unipolar power supply fixed at the top of the ground, a bipolar power supply fixed at the front end of the unipolar power supply, a switch box fixedly connected to the ground at the right end of the bipolar power supply, a movable main rod at the front end of the switch box, a movable secondary rod at the rear end of the movable main rod, a commutator block at the left end of the movable secondary rod, a fan at the bottom of the commutator block, and a filter fixed inside the switch box. The device is equipped with a programmable switch box and is fixedly connected to the switch box. The programmable switch box contains a proximity block, and the left end of the proximity block has a proximity cavity. A bipolar power connection line is fixed to the left end of the programmable switch box. The left end of the bipolar power connection line is fixedly connected to the bipolar power supply. A wire is fixed to the rear end of the bipolar power connection line. A thyristor is fixed to the left end of the wire. A DC-DC converter is provided at the left end of the thyristor. A supercapacitor is provided at the front end of the DC-DC converter. A self-resetting electronic fuse is also provided at the left end of the thyristor.
[0006] Preferably, the right end of the unipolar power supply is fixedly connected to the self-resetting electronic fuse via a unipolar power supply connection line, the right end of the self-resetting electronic fuse is fixedly connected to the thyristor via a protective wire, the front end of the protective wire is fixedly connected to the DC-DC converter via a wire, the front end of the DC-DC converter is fixedly connected to the supercapacitor via a wire, and the programmable switch box is fixedly connected to the filter via a wire.
[0007] Preferably, a controller is fixed to the top of the switch box, a power supply is fixed to the right end of the controller, the front end of the switch box is fixedly connected to the fixed end of the moving main rod through a connecting strip, a temperature sensor is fixed inside the switch box, and a filter screen is fixed to the front end of the switch box.
[0008] Preferably, the main moving rod is fixedly connected to the secondary moving rod at its rear end, a reversing motor is fixedly fixed to the left end of the secondary moving rod, the reversing motor is rotatably connected to the reversing block at its left end, a camera is fixedly fixed to the left end of the reversing block, and a fan motor is fixedly fixed to the bottom of the reversing block, the fan motor is rotatably connected to the fan at its bottom.
[0009] Preferably, a switch box controller is fixed to the top of the programmable switch box, a proximity rod is fixed to the front end of the programmable switch box, a stabilizing block is fixed to the rear end of the proximity rod, a moving strip is slidably connected to the front end of the stabilizing block, the moving strip is fixedly connected to the proximity block at its left end, a proximity spring is provided on the outside of the moving strip, a connecting wire is fixed to the top of the proximity block, the right end of the connecting wire is fixedly connected to the inside of the programmable switch box, a proximity head is fixed to the right end of the bipolar power connection wire and the wire, and a switch box camera is also fixed inside the proximity spring.
[0010] Compared with the prior art, the beneficial effects of this utility model are:
[0011] This invention provides stable power to circuits or equipment requiring a single polarity voltage using a unipolar power supply, and stable power to circuits or equipment requiring bidirectional power supply using a bipolar power supply. When a unipolar power supply is mistakenly connected to the grid, the thyristor detects the reverse current and quickly conducts, triggering a self-resetting electronic fuse to cut off the circuit, thus ensuring circuit safety and operator safety. Simultaneously, a DC-DC converter converts the reverse current into electrical energy stored in a supercapacitor, which can then power auxiliary equipment or feed back to the grid, saving resources. The programmable switch box allows for circuit switching between bipolar and unipolar power supplies through both manual and programmable modes, reducing circuit modification costs, improving personnel safety, and increasing testing efficiency. This device is convenient and safe to use. The programmable switch unit enables remote selection of power cabinet access, avoiding electric shock accidents caused by direct operation of the switch. This device is highly versatile, has low modification costs, and can add multiple power supplies to the circuit without increasing cable laying, making it suitable for various power cabinet connections.
[0012] This invention utilizes the telescopic movement of the main moving rod to drive the secondary moving rod forward and backward. Simultaneously, the telescopic movement of the secondary moving rod drives the commutator motor, which in turn drives the commutator block to rotate. This ensures the accuracy and efficiency of cooling, thereby guaranteeing the cooling effect. Furthermore, the device uses a temperature sensor to monitor the internal temperature of the switch box, and a fan motor drives the fan to rotate, ensuring the cooling effect and the safety of the internal components of the switch box.
[0013] This invention uses the extension and retraction of the proximity rod to move the stabilizing block, which in turn moves the moving strip, which in turn moves the proximity block. At this time, due to the action of the proximity spring, the proximity cavity and the proximity head are tightly attached, thus ensuring replacement efficiency and accuracy of unipolar and bipolar power supply replacement, thereby improving the automation level of the entire device. Attached Figure Description
[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0015] In the attached diagram:
[0016] Figure 1 This is a schematic diagram of the overall design of this utility model;
[0017] Figure 2 This is a schematic diagram of the interior of the switch box of this utility model;
[0018] Figure 3 This is a schematic diagram of the bottom of the commutator block of this utility model;
[0019] Figure 4 This is a cross-sectional view of the switch box of this utility model;
[0020] Figure 5 This is a schematic diagram of the internal structure of the programmable switch box of this utility model;
[0021] Figure 6 This is a schematic diagram of the right end of the close-fitting block of this utility model.
[0022] In the diagram: 1-Ground; 2-Switch box; 3-Main moving rod; 4-Filter; 5-Programmable switch box; 6-Thyristor; 101-Unipolar power supply; 102-Bipolar power supply; 103-Unipolar power supply connection wire; 104-Bipolar power supply connection wire; 105-Wire; 201-Controller; 202-Power supply; 203-Filter screen; 301-Sub-moving rod; 302-Commutating motor; 303-Commutating block; 304-Camera; 305-Fan; 306-Fan motor; 307-Connecting bar; 501-Switch box controller; 502-Proximity rod; 503-Proximity block; 504-Proximity head; 505-Proximity spring; 506-Moving bar; 507-Stabilizing block; 508-Proximity cavity; 509-Connecting wire; 510-Switch box camera; 601-DC-DC converter; 602-Supercapacitor; 603-Self-resetting electronic fuse; 604-Temperature sensor; 605-Protective wire. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0024] Example 1, by Figures 1-2 , Figure 5 The present invention includes a ground surface 1, which supports the entire device. A unipolar power supply 101 is fixed to the top of the ground surface 1, providing stable power to circuits or devices requiring a single polarity voltage. A bipolar power supply 102 is fixed to the front end of the unipolar power supply 101, providing stable power to circuits or devices requiring bidirectional power supply. A switch box 2 is fixedly connected to the ground surface 1 at the right end of the bipolar power supply 102. The switch box 2 is made of plastic material and is used to house the main moving rod 3. The main moving rod 3 is telescopic, thereby driving the auxiliary moving rod 301 back and forth. The main moving rod 3 has a retractable secondary moving rod 301 at its rear end, which drives the commutator motor 302 to move left and right. A commutator block 303, made of alloy material, is located at the left end of the secondary moving rod 301. The commutator block 303 is used to position the camera 304. A fan 305 is located at the bottom of the commutator block 303, which reduces the internal temperature of the switch box 2 by rotating. A filter 4 is fixed inside the switch box 2 to purify the power quality, reduce electromagnetic interference, and ensure stable operation of the equipment. A programmable switch box 5 is fixedly connected to the switch box 2 at the left end of the filter 4. Box 5 is used to switch power between two power cabinets. The programmable switch box 5 contains a proximity block 503 made of ceramic material. The left end of the proximity block 503 has a proximity cavity 508 made of copper material, which facilitates power connection. A bipolar power connection cable 104 is fixed to the left end of the programmable switch box 5. The bipolar power connection cable 104 is used to power the bipolar power supply 102 and the programmable switch box 5. The left end of the bipolar power connection cable 104 is fixedly connected to the bipolar power supply 102. A wire 105 is fixed to the rear end of the bipolar power connection cable 104. The wire 105 is for the programmable switch box 5. The switch box 5 is energized with the thyristor 6. The left end of the conductor 105 is fixed with the thyristor 6. When the unipolar power supply is mistakenly connected to the feed grid circuit, the thyristor 6 detects the reverse current and quickly conducts, triggering the self-resetting electronic fuse 603 to cut off the circuit, thereby ensuring the safety of the circuit and the safety of the operator. The left end of the thyristor 6 is provided with a DC-DC converter 601. The front end of the DC-DC converter 601 is provided with a supercapacitor 602. The DC-DC converter 601 converts the reverse current into electrical energy and stores it inside the supercapacitor 602, thereby supplying power to auxiliary equipment or feeding back to the grid, thereby saving resources. The left end of the thyristor 6 is also provided with a self-resetting electronic fuse 603.
[0025] Example 2, based on Example 1, combined with... Figures 3-4 , Figure 6As shown, the right end of the unipolar power supply 101 is fixedly connected to the self-resetting electronic fuse 603 via a unipolar power supply connection line 103. The right end of the self-resetting electronic fuse 603 is fixedly connected to the thyristor 6 via a protective wire 605. The front end of the protective wire 605 is fixedly connected to the DC-DC converter 601 via a wire. The front end of the DC-DC converter 601 is fixedly connected to the supercapacitor 602 via a wire. The programmable switch box 5 is fixedly connected to the filter 4 via a wire. A controller 201 is fixedly fixed on the top of the switch box 5. The controller 201 is used to control the entire device. A power supply 202 is fixedly fixed on the right end of the controller 201. The power supply 202 provides power to the entire device. The switch box 2 is fixedly connected to the fixed end of the moving main rod 3 via a connecting strip 307 to provide the required electrical energy. A temperature sensor 604 is fixed inside the switch box 2 to monitor the internal temperature. A filter screen 203 is fixed at the front end of the switch box 2 to facilitate air circulation. The moving main rod 3 is fixedly connected to the moving auxiliary rod 301 at its rear end. A commutator motor 302 is fixed to the left end of the moving auxiliary rod 301, which drives the commutator block 303 to rotate. The commutator motor 302 is rotatably connected to the commutator block 303 at its left end. A camera 304 is fixed to the left end of the commutator block 303. 304 is used to monitor the position of the fan 305. A fan motor 306 is fixed to the bottom of the commutator block 303. The fan motor 306 can drive the fan 305 to rotate. The fan motor 306 is rotatably connected to the fan 305 at its bottom. A switch box controller 501 is fixed to the top of the programmable switch box 5. The switch box controller 501 is used to control the internal parts of the programmable switch box 5. A proximity rod 502 is fixed to the front end of the programmable switch box 5. The proximity rod 502 is telescopic, which can drive the stabilizing block 507 to move, thereby driving the moving bar 506 to move. A stabilizing block 507 is fixed to the rear end of the proximity rod 502. The moving bar 506 is slidably connected to the front end of the stabilizing block 507. A movable strip 506 is used to position the proximity block 503. The movable strip 506 is fixedly connected to the proximity block 503 at its left end. A proximity spring 505 is provided on the outside of the movable strip 506. The proximity spring 505 is elastic, so that the proximity block 503 is close to the left end of the programmable switch box 5. A connecting wire 509 is fixed to the top of the proximity block 503. The connecting wire 509 facilitates the electrical connection between the proximity cavity 508 and the programmable switch box 5. The right end of the connecting wire 509 is fixedly connected to the inside of the programmable switch box 5. A proximity head 504 is fixed to the right end of both the bipolar power connection line 104 and the wire 105. A switch box camera 510 is also fixed inside the proximity spring 505.The switch box camera 510 is used to monitor the position of the proximity block 503. The proximity head 504 is made of copper. The proximity head 504, by cooperating with the proximity cavity 508, facilitates the replacement of the unipolar power supply 101 and the bipolar power supply 102.
[0026] When using this device, the operator installs the entire device according to requirements. The operator then connects the unipolar power supply 101 and the bipolar power supply 102 to the mains power, and connects the filter 4 to the feeder network equipment under test. Testing then begins. When high-power equipment needs to be measured, the controller 201 controls the switch box camera 510 via the switch box controller 501 to monitor the position of the proximity block 503. At this time, the controller 201 controls the proximity rod 502 to move, thereby moving the proximity block 503 and ensuring the proximity... When cavity 508 moves, the proximity spring 505 and the moving bar 506 allow cavity 508 to be in close contact with the proximity head 504 at the right end of the conductor 105. When testing the electromagnetic compatibility of the feeder equipment, controller 201 controls the proximity rod 502 to retract, thereby moving the proximity block 503 forward, so that cavity 508 is in close contact with the proximity head 504 at the right end of the bipolar power connection 104, thus ensuring test accuracy. When testing high-power equipment, if a feeder current suddenly occurs in the circuit, the current flows along the... The thyristor 6 flows into the self-resetting electronic fuse 603. At this time, due to the action of the thyristor 6 and the self-resetting electronic fuse 603, the protective conductor 605 is disconnected. Current then enters the DC-DC converter 601. The DC-DC converter 601 converts the reverse current into electrical energy and stores it inside the supercapacitor 602, thereby supplying power to auxiliary equipment or feeding back into the grid, thus saving resources. When using this device, the temperature sensor 604 can monitor the internal temperature of the switch box 2. Furthermore, when the internal temperature of the switch box 2... At higher temperatures, the controller 201 controls the main moving rod 3 and the auxiliary moving rod 301 to work together, thereby moving the commutator block 303 to the desired position. Furthermore, the controller 201 controls the commutator motor 302 to drive the commutator block 303 to rotate, thereby adjusting the cooling angle. Furthermore, the controller 201 can monitor the position of the fan 305 through the camera 304. At this time, the controller 201 controls the fan motor 306 to make the fan 305 rotate, thereby cooling the internal parts of the switch box 2, thus ensuring the safety of the entire device.
[0027] The workflow of this utility model is as follows: When using this device, the operator installs the entire device according to requirements. The operator then connects the unipolar power supply 101 and the bipolar power supply 102 to the mains power, and connects the filter 4 to the feeder network equipment under test. Testing then begins. When high-power equipment needs to be measured, the controller 201 controls the switch box camera 510 via the switch box controller 501 to monitor the position of the proximity block 503. At this time, the controller 201 controls the proximity rod 502 to work, thereby moving the proximity block 503. This causes the proximity cavity 508 to move. At this time, the proximity spring 505 and the moving bar 506 allow the proximity cavity 508 to be tightly attached to the proximity head 504 at the right end of the conductor 105. When testing the electromagnetic compatibility of the feeder equipment, the controller 201 controls the proximity rod 502 to retract, thereby moving the proximity block 503 forward. This ensures that the proximity cavity 508 is tightly attached to the proximity head 504 at the right end of the bipolar power connection line 104, thus guaranteeing test accuracy. When testing high-power equipment, if a sudden feeder current is generated in the circuit... Current flows through the thyristor 6 into the self-resetting electronic fuse 603. At this time, due to the action of the thyristor 6 and the self-resetting electronic fuse 603, the protective conductor 605 is disconnected. The current then enters the DC-DC converter 601. The DC-DC converter 601 converts the reverse current into electrical energy, which is stored inside the supercapacitor 602, thereby supplying power to auxiliary equipment or feeding back into the grid, thus saving resources. When using this device, the temperature sensor 604 can monitor the internal temperature of the switch box 2. Furthermore, when the temperature inside the switch box 2... When the internal temperature is high, the controller 201 controls the moving main rod 3 and the moving auxiliary rod 301 to work together to move the commutator block 303 to the required position. Furthermore, the controller 201 controls the commutator motor 302 to drive the commutator block 303 to rotate, thereby adjusting the cooling angle. Furthermore, the controller 201 can monitor the position of the fan 305 through the camera 304. At this time, the controller 201 controls the fan motor 306 to make the fan 305 rotate, thereby cooling the internal parts of the switch box 2 and ensuring the safety of the entire device.
[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A power switch conversion device suitable for electromagnetic compatibility testing of feeder equipment, characterized in that: The system includes a ground (1), on the top of which is a unipolar power supply (101), and at the front end of which is a bipolar power supply (102). A switch box (2) is fixedly connected to the ground (1) at the right end of the bipolar power supply (102). A main moving rod (3) is located at the front end of the switch box (2), and a secondary moving rod (301) is located at the rear end of the main moving rod (3). A commutator (303) is located at the left end of the secondary moving rod (301), and a fan (305) is located at the bottom of the commutator (303). A filter (4) is fixed inside the switch box (2), and a programmable switch box (5) is fixedly connected to the switch box (2) at the left end of the filter (4). The programmable switch box (5) is provided with a proximity block (503) inside. The left end of the proximity block (503) is provided with a proximity cavity (508). The left end of the programmable switch box (5) is fixed with a bipolar power connection line (104). The left end of the bipolar power connection line (104) is fixedly connected to the bipolar power supply (102). The rear end of the bipolar power connection line (104) is fixed with a wire (105). The left end of the wire (105) is fixed with a thyristor (6). The left end of the thyristor (6) is provided with a DC-DC converter (601). The front end of the DC-DC converter (601) is provided with a supercapacitor (602). The left end of the thyristor (6) is also provided with a self-resetting electronic fuse (603).
2. A power switch conversion device suitable for electromagnetic compatibility testing of feeder equipment according to claim 1, characterized in that: The right end of the unipolar power supply (101) is fixedly connected to the self-resetting electronic fuse (603) via a unipolar power supply connection line (103). The right end of the self-resetting electronic fuse (603) is fixedly connected to the thyristor (6) via a protective wire (605). The front end of the protective wire (605) is fixedly connected to the DC-DC converter (601) via a wire. The front end of the DC-DC converter (601) is fixedly connected to the supercapacitor (602) via a wire. The programmable switch box (5) is fixedly connected to the filter (4) via a wire.
3. A power switch conversion device for electromagnetic compatibility testing of feeder equipment according to claim 1, characterized in that: The top of the switch box (2) is fixed with a controller (201), and the right end of the controller (201) is fixed with a power supply (202). The front end of the switch box (2) is fixedly connected to the fixed end of the moving main rod (3) through a connecting strip (307). The inside of the switch box (2) is fixed with a temperature sensor (604), and the front end of the switch box (2) is fixed with a filter screen (203).
4. A power switch conversion device suitable for electromagnetic compatibility testing of feeder equipment according to claim 3, characterized in that: The main moving rod (3) is fixedly connected to the secondary moving rod (301) at its rear end. A reversing motor (302) is fixed to the left end of the secondary moving rod (301). The reversing motor (302) is rotatably connected to the reversing block (303) at its left end. A camera (304) is fixed to the left end of the reversing block (303). A fan motor (306) is fixed to the bottom of the reversing block (303). The fan motor (306) is rotatably connected to the fan (305) at its bottom.
5. A power switch conversion device for electromagnetic compatibility testing of feeder equipment according to claim 2, characterized in that: The programmable switch box (5) is fixed with a switch box controller (501) on the top. The programmable switch box (5) is fixed with a proximity rod (502) at the front end. The proximity rod (502) is fixed with a stabilizing block (507) at the rear end. The stabilizing block (507) is slidably connected with a moving strip (506) at the front end. The moving strip (506) is fixedly connected with the proximity block (503) at its left end. The moving strip (506) is provided with a proximity spring (505) on the outside. The proximity block (503) is fixed with a connecting wire (509) at the top. The right end of the connecting wire (509) is fixedly connected to the inside of the programmable switch box (5). The right end of the bipolar power connection line (104) and the wire (105) are both fixed with a proximity head (504). The proximity spring (505) is also fixed with a switch box camera (510) inside.