Partial-discharge-free variable-frequency power supply device

Abstract

The utility model discloses a non-partial-discharge variable-frequency power supply device, which relates to the technical field of variable-frequency power supplies and comprises a power supply cabinet body, radiating screens are symmetrically arranged on two sides in the power supply cabinet body, radiating baffles are arranged outside the radiating screens, and a cabinet door is arranged at the upper end of the middle of the front of the power supply cabinet body. The front middle lower end of the power supply cabinet body is provided with an input end wiring cavity, and the rear middle lower end of the power supply cabinet body is provided with an output end wiring cavity. The cleaning assembly is arranged, the forward and reverse rotation motor is started, the forward and reverse rotation motor drives the threaded rod to rotate, the lead screw block moves up and down along with rotation of the threaded rod, the cleaning plate and the cleaning brush are driven to move up and down along with vertical movement of the lead screw block, and dust accumulated on the heat dissipation net plate is cleaned; through the arrangement of the output end wiring cavity, the isolation power supply output jack outputs a 220V isolation power supply, the synchronous power supply output jack provides a 50V / 100W synchronous power supply, and the optical fiber communication connection port is connected with an optical fiber port of a remote control box.

Description

Technical Field

[0001] The utility model relates to the technical field of variable frequency power supplies, in particular to a variable frequency power supply device without partial discharge. Background Art

[0002] A non-PD variable-frequency power supply, also known as a non-partial-discharge variable-frequency power supply device, is a crucial component of partial discharge and series resonance test systems. This non-PD variable-frequency power supply (non-partial-discharge variable-frequency power supply device) is widely used across various industries. It can be used for AC withstand voltage and partial discharge testing of all electrical equipment. An excitation transformer is used to excite a series or parallel resonant circuit. By adjusting the output frequency of the variable-frequency power supply, resonance occurs between the inductor L of the circuit and the capacitor C of the test specimen. The resonant voltage is the voltage applied to the test specimen. Alternatively, the voltage can be directly output to the primary of the transformer via an intermediate transformer for inductive withstand voltage testing.

[0003] Publication number: CN218938346U discloses a variable frequency power supply without partial discharge, comprising a cabinet and a rotating winding rod, a storage assembly disposed at the lower right side of the cabinet, the storage assembly comprising a support plate and a storage box, a storage box disposed on the right side of the support plate, the rotating winding rod disposed on the right side of the rotating shaft block, and a limiting arc plate disposed on the upper right side of the telescopic rod. The variable frequency power supply without partial discharge, through the storage assembly, the rotating shaft block, the telescopic rod, the limiting arc plate, the rotating winding rod and the fixing buckle, facilitates the operator to store optical fibers more conveniently and labor-savingly, avoids bending, twisting, squeezing and knotting of the optical fibers during placement, thereby extending the service life of the optical fibers, and the groove block, the support member, the limiting rectangular shell, the dust cover and the limiting assembly facilitate the operator to put the dust cover on the outside of the cabinet more labor-savingly to prevent dust from entering the interior of the device through the air duct.

[0004] However, when the above device is used, it is easy to stay in the same position for a long time, so that dust is easily accumulated on the heat dissipation mesh plate, affecting the heat dissipation effect of the device. Therefore, it is necessary to propose a variable frequency power supply device without partial discharge. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a variable frequency power supply device without partial discharge.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A variable frequency power supply device without partial discharge includes a power cabinet, wherein heat dissipation mesh panels are symmetrically arranged on both sides of the interior of the power cabinet, a heat dissipation baffle is arranged outside the heat dissipation mesh panels, a cabinet door is arranged at the upper middle end of the front of the power cabinet, an input terminal wiring cavity is opened at the lower middle end of the front of the power cabinet, an output terminal wiring cavity is opened at the lower middle end of the rear of the power cabinet, and a cleaning component for cleaning the heat dissipation mesh panels is symmetrically arranged inside the power cabinet.

[0008] Preferably, three wiring terminals are fixedly installed in the input terminal wiring cavity;

[0009] The three terminals are used for AC 3-phase input, regardless of phase sequence and without neutral line connection.

[0010] Preferably, an isolated power supply output jack is provided in the output terminal connection cavity, and a synchronous power supply output jack is provided in the output terminal connection cavity;

[0011] The isolated power output jack outputs isolated V isolated power, and the synchronous power output jack provides V / W synchronous power (for external synchronization of partial discharge tester).

[0012] Preferably, the output terminal connection cavity is provided with an optical fiber communication connection port, the output terminal connection cavity is provided with a high-voltage sampling port, and the output terminal connection cavity is provided with a power output copper busbar;

[0013] The optical fiber communication connection port is connected to the optical fiber port of the remote control box, the high-voltage sampling port is connected to the high-voltage sampling port of the voltage divider, and the power output copper busbar is strictly prohibited from being grounded.

[0014] Preferably, a ground wire is fixedly installed in the output terminal wiring cavity, and a power filter switch is provided in the output terminal wiring cavity;

[0015] When the power supply has a leakage protector, the power filter switch needs to be placed in the "filter off" state.

[0016] Preferably, the cleaning assembly includes a fixed mounting plate fixedly mounted in the power cabinet, a threaded rod is rotatably mounted between the top of the fixed mounting plate and the top of the power cabinet, and a plurality of limit rods are fixedly mounted between the top of the fixed mounting plate and the top of the power cabinet;

[0017] The limit rods are symmetrically arranged on both sides of the threaded rod, a forward and reverse motor is fixedly installed at the bottom end of the power cabinet, the output shaft of the forward and reverse motor is coaxially fixedly connected to the threaded rod, a screw block is threadedly sleeved on the threaded rod, and the screw block is slidably sleeved on the limit rod;

[0018] A cleaning plate is fixedly installed on the side of the lead screw block close to the heat dissipation mesh plate, and a plurality of cleaning brushes are fixedly installed on the side of the cleaning plate close to the heat dissipation mesh plate at equal intervals;

[0019] It is used to clean the dust accumulated on the heat dissipation mesh plate. Start the forward and reverse motors, which drive the threaded rod to rotate. As the threaded rod rotates, the screw block moves up and down. As the screw block moves up and down, the cleaning plate and the cleaning brush are driven up and down to clean the dust accumulated on the heat dissipation mesh plate.

[0020] The utility model has the following beneficial effects:

[0021] 1. By setting up the cleaning component and starting the forward and reverse motor, the forward and reverse motor drives the threaded rod to rotate. As the threaded rod rotates, the screw block moves up and down. As the screw block moves up and down, the cleaning plate and the cleaning brush move up and down to clean the dust accumulated on the heat dissipation mesh.

[0022] 2. By setting the output terminal wiring cavity, the isolated power supply output jack outputs an isolated 220V isolated power supply, the synchronous power supply output jack provides a 50V / 100W synchronous power supply (for external synchronization of the partial discharge tester), the optical fiber communication connection port is connected to the optical fiber port of the remote control box, the high-voltage sampling port is connected to the high-voltage sampling port of the voltage divider, and the power filter switch needs to be placed in the "filter disconnected" state when the power supply has a leakage protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the external structure of a variable frequency power supply device without partial discharge proposed by the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the heat dissipation screen of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the cleaning component of the utility model;

[0026] Figure 4 This is a schematic diagram of the back structure of the power cabinet of the utility model;

[0027] Figure 5 For this utility model Figure 4 A magnified view of the structure at point A.

[0028] In the figure: 1. Power cabinet; 2. Heat dissipation mesh plate; 3. Heat dissipation baffle; 4. Cabinet middle door; 5. Input terminal wiring cavity; 51. Wiring terminal; 6. Output terminal wiring cavity; 61. Isolation power output jack; 62. Synchronous power output jack; 63. Fiber optic communication connector; 64. High-voltage sampling port; 65. Power output copper bus; 66. Grounding wire; 67. Power filter switch; 7. Cleaning component; 71. Fixed mounting plate; 72. Threaded rod; 73. Limit rod; 74. Forward and reverse motor; 75. Screw block; 76. Cleaning plate; 77. Cleaning brush. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0031] Reference Figure 1-5 A variable frequency power supply device without partial discharge includes a power cabinet 1, a heat dissipation mesh plate 2 is symmetrically arranged on both sides of the power cabinet 1, a heat dissipation baffle 3 is arranged outside the heat dissipation mesh plate 2, a cabinet middle door 4 is arranged at the upper middle end of the front of the power cabinet 1, an input terminal wiring cavity 5 is opened at the lower middle end of the front of the power cabinet 1, an output terminal wiring cavity 6 is opened at the lower middle end of the rear of the power cabinet 1, and a cleaning component 7 for cleaning the heat dissipation mesh plate 2 is symmetrically arranged inside the power cabinet 1.

[0032] Three wiring terminals 51 are fixedly installed in the input terminal wiring cavity 5 .

[0033] An isolated power output jack 61 is provided in the output terminal connection cavity 6 , and a synchronous power output jack 62 is provided in the output terminal connection cavity 6 .

[0034] The output terminal connection cavity 6 is provided with an optical fiber communication connection port 63 , a high voltage sampling port 64 , and a power output copper bus 65 .

[0035] A grounding wire 66 is fixedly installed in the output terminal wiring cavity 6 , and a power supply filter switch 67 is provided in the output terminal wiring cavity 6 .

[0036] The cleaning assembly 7 includes a fixed mounting plate 71 fixedly installed in the power cabinet 1, a threaded rod 72 is rotatably installed between the top of the fixed mounting plate 71 and the top inside the power cabinet 1, and a plurality of limit rods 73 are fixedly installed between the top of the fixed mounting plate 71 and the top inside the power cabinet 1.

[0037] The limit rod 73 is symmetrically arranged on both sides of the threaded rod 72. A forward and reverse motor 74 is fixedly installed at the bottom end of the power cabinet 1. The output shaft of the forward and reverse motor 74 is coaxially fixedly connected to the threaded rod 72. A screw block 75 is threadedly sleeved on the threaded rod 72, and the screw block 75 is slidably sleeved on the limit rod 73.

[0038] A cleaning plate 76 is fixedly mounted on one side of the lead screw block 75 close to the heat dissipation mesh plate 2 , and a plurality of cleaning brushes 77 are fixedly mounted at equal intervals on one side of the cleaning plate 76 close to the heat dissipation mesh plate 2 .

[0039] In the present invention, when the device is in the same position for a long time and dust accumulates on the heat dissipation mesh plate 2, the forward and reverse motors 74 are started, and the forward and reverse motors 74 drive the threaded rod 72 to rotate. As the threaded rod 72 rotates, the screw block 75 moves up and down. As the screw block 75 moves up and down, the cleaning plate 76 and the cleaning brush 77 are driven to move up and down, thereby cleaning the dust accumulated on the heat dissipation mesh plate 2 to avoid affecting the heat dissipation effect of the device.

[0040] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A variable frequency power supply device without partial discharge, comprising a power cabinet (1), characterized in that: The power cabinet (1) has heat dissipation screens (2) symmetrically arranged on both sides thereof, and a heat dissipation baffle (3) arranged outside the heat dissipation screens (2). The power cabinet (1) has a cabinet door (4) arranged at the upper middle portion of the front, an input terminal connection cavity (5) opened at the lower middle portion of the front, and an output terminal connection cavity (6) opened at the lower middle portion of the rear, and a cleaning assembly (7) for cleaning the heat dissipation screens (2) symmetrically arranged inside the power cabinet (1).

2. The partial discharge-free variable frequency power supply device according to claim 1, characterized in that: Three wiring terminals (51) are fixedly installed in the input terminal wiring cavity (5).

3. The partial discharge-free variable frequency power supply device according to claim 1, characterized in that: An isolated power output jack (61) is provided in the output terminal connection cavity (6), and a synchronous power output jack (62) is provided in the output terminal connection cavity (6).

4. The partial discharge-free frequency conversion power supply device according to claim 3, characterized in that: The output terminal connection cavity (6) is provided with an optical fiber communication connection port (63), the output terminal connection cavity (6) is provided with a high-voltage sampling port (64), and the output terminal connection cavity (6) is provided with a power output copper busbar (65).

5. The partial discharge-free variable frequency power supply device according to claim 4, characterized in that: A grounding wire (66) is fixedly installed in the output terminal connection cavity (6), and a power supply filter switch (67) is provided in the output terminal connection cavity (6).

6. The partial discharge-free variable frequency power supply device according to claim 1, characterized in that: The cleaning assembly (7) comprises a fixed mounting plate (71) fixedly mounted in the power cabinet (1), a threaded rod (72) rotatably mounted between the top of the fixed mounting plate (71) and the top of the power cabinet (1), and a plurality of limiting rods (73) fixedly mounted between the top of the fixed mounting plate (71) and the top of the power cabinet (1).

7. The partial discharge-free variable frequency power supply device according to claim 6, characterized in that: The limiting rod (73) is symmetrically arranged on both sides of the threaded rod (72); a forward and reverse motor (74) is fixedly installed at the bottom end of the power cabinet (1); the output shaft of the forward and reverse motor (74) is coaxially fixedly connected to the threaded rod (72); a screw block (75) is threadedly sleeved on the threaded rod (72); and the screw block (75) is slidably sleeved on the limiting rod (73).

8. The partial discharge-free variable frequency power supply device according to claim 7, characterized in that: A cleaning plate (76) is fixedly installed on one side of the lead screw block (75) close to the heat dissipation mesh plate (2), and a plurality of cleaning brushes (77) are fixedly installed at equal intervals on one side of the cleaning plate (76) close to the heat dissipation mesh plate (2).

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