A tuning device for a high-power high-frequency power supply

Abstract

The utility model discloses a kind of tuning devices of high-power high-frequency power supply, including A side copper plate, B side copper plate, A side tuning mobile plate and B side tuning mobile plate, A side copper plate and B side copper plate are arranged opposite in front and back, A side copper plate and B side copper plate are clamped with isolation insulating layer between;A side copper plate, B side copper plate and the middle part of isolation insulating layer are provided with a magnetic field tuning round hole;A side tuning mobile plate is set in the front side of magnetic field tuning round hole and can move back and forth, B side tuning mobile plate is set in the back side of magnetic field tuning round hole and can move back and forth, and A side tuning mobile plate and B side tuning mobile plate are simultaneously close to or away from the magnetic field tuning round hole.The utility model discloses a kind of tuning devices of high-power high-frequency power supply, not dependent on winding coil, but directly utilize conductor plate current and movable magnetic yoke to generate and adjust magnetic field and equivalent inductance, can withstand 13000A~18000A current, frequency reaches 200KHz Large-power tuning function.

Description

Technical Field

[0001] This utility model belongs to the field of high-frequency power supply technology, specifically relating to a tuning device for a high-power high-frequency power supply. Background Technology

[0002] With the rapid development of domestic industry, many sectors, especially the automotive and petroleum industries, are experiencing rapid growth. As the demands on industrial products increase, manufacturing technologies are also constantly evolving. This is particularly true for power supplies used in high-frequency welding. On the one hand, the power output of individual equipment is increasing, and the frequency can reach very high ranges. In high-power, high-frequency equipment, the requirements for the tuning device of the power supply system are becoming increasingly stringent. It must ensure the normal operation of the equipment, as well as its long lifespan, high reliability, low failure rate, and high efficiency. The tuning device of a high-frequency power supply is a crucial and critical component.

[0003] Currently, tuning devices for high-frequency power supplies are in use, but traditionally they rely on transformers with wound coils, requiring manual adjustment of taps, which is inefficient. The fundamental bottleneck of traditional wound adjustable inductors in ultra-high power and ultra-high frequency applications is:

[0004] (1) Current capacity limit: At current levels of 13000A-18000A, traditional multi-turn wire-wound inductors will suffer catastrophic eddy current losses and overheating due to the "skin effect" and "proximity effect", and are extremely difficult to manufacture.

[0005] (2) High-frequency loss and parasitic parameters: At high power with a frequency of up to 200KHz, the loss of traditional magnetic core and winding increases dramatically, and the parasitic capacitance between windings will also cause poor resonance, affecting circuit stability. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tuning device for a high-power high-frequency power supply. It does not rely on a wound coil, but directly uses the conductor plate current and a movable magnetic yoke to generate and adjust the magnetic field and equivalent inductance. It can withstand high-power tuning functions with currents of 13000A to 18000A and frequencies up to 200KHz, thereby breaking through the loss and manufacturing bottleneck of traditional wound inductors under ultra-high frequency and ultra-high current conditions.

[0007] The technical solution to achieve the above objective is: a tuning device for a high-power high-frequency power supply, comprising a copper plate on side A, a copper plate on side B, a tuning moving plate on side A, and a tuning moving plate on side B, wherein:

[0008] The copper plate on side A and the copper plate on side B are arranged opposite each other, one in front of the other, and an insulating layer is sandwiched between the copper plate on side A and the copper plate on side B.

[0009] A magnetic field tuning circular hole is opened in the middle of the copper plate on side A, the copper plate on side B, and the insulating layer.

[0010] The A-side tuning moving plate is movable back and forth and is disposed on the front side of the magnetic field tuning circular hole. The B-side tuning moving plate is movable back and forth and is disposed on the rear side of the magnetic field tuning circular hole. The A-side tuning moving plate and the B-side tuning moving plate simultaneously move closer to or further away from the magnetic field tuning circular hole.

[0011] The copper plate on side A and the copper plate on side B are respectively provided with input copper busbars at one end and output copper busbars at the other end. When the input copper busbars of the copper plate on side A and the copper plate on side B receive high-frequency high current, an alternating magnetic field is generated at the magnetic field tuning hole. Tuning is achieved by the simultaneous movement of the tuning moving plate on side A and the tuning moving plate on side B.

[0012] The above-mentioned tuning device for a high-power high-frequency power supply, wherein both the A-side tuning moving plate and the B-side tuning moving plate include a middle plate and inclined wing plates connected to both sides thereof.

[0013] The magnetic field tuning holes of the copper plate on side A and side B are respectively provided with side wing copper plates corresponding to the inclined wing plates.

[0014] The tuning device for a high-power high-frequency power supply described above, wherein the copper plate on side A, the copper plate on side B, the tuning moving plate on side A, and the tuning moving plate on side B have cooling water channels inside, and each cooling water channel has a cooling water connector at its inlet and outlet.

[0015] The tuning device of this utility model for a high-power high-frequency power supply does not rely on a wound coil, but directly uses the conductor plate current and a movable magnetic yoke to generate and adjust the magnetic field and equivalent inductance. It can withstand high-power tuning functions with currents of 13000A to 18000A and frequencies up to 200KHz, thus breaking through the loss and manufacturing bottleneck of traditional wound inductors under ultra-high frequency and ultra-high current conditions. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram (front view) of the tuning device for the high-power high-frequency power supply of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram (side view) of the tuning device for the high-power high-frequency power supply of this utility model;

[0018] Figure 3 This is a top view of the tuning device for the high-power high-frequency power supply of this utility model. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, its specific embodiments are described in detail below with reference to the accompanying drawings:

[0020] Please see Figure 1 , Figure 2 and Figure 3 The preferred embodiment of this utility model is a tuning device for a high-power high-frequency power supply, comprising a copper plate 1 on side A, a copper plate 2 on side B, a tuning moving plate 3 on side A, and a tuning moving plate 4 on side B.

[0021] Copper plate 1 on side A and copper plate 2 on side B are arranged opposite each other, with an insulating layer sandwiched between them. A magnetic field tuning hole 5 is provided in the middle of copper plate 1 on side A, copper plate 2 on side B and the insulating layer.

[0022] The A-side tuning moving plate 3 can be moved back and forth and is set on the front side of the magnetic field tuning circular hole 5. The B-side tuning moving plate 4 can be moved back and forth and is set on the rear side of the magnetic field tuning circular hole 5. The A-side tuning moving plate 3 and the B-side tuning moving plate 4 simultaneously approach or move away from the magnetic field tuning circular hole 5 (hereinafter referred to as "entering and exiting at the same time").

[0023] A-side copper plate 1 has an A-side input copper busbar 11 at one end and an A-side output copper busbar 12 at the other end; B-side copper plate 2 has a B-side input copper busbar 21 at one end and a B-side output copper busbar 22 at the other end.

[0024] When the A-side input copper busbar 11 and the B-side input copper busbar 21 receive high-frequency large current, an alternating magnetic field is generated at the magnetic field tuning hole 5. Tuning is achieved by the simultaneous entry and exit of the A-side tuning moving plate 3 and the B-side tuning moving plate 4.

[0025] Both the A-side tuning moving plate 3 and the B-side tuning moving plate 4 include a middle plate 31 and inclined wing plates 32 connected to both sides thereon; a side wing copper plate 13 corresponding to the inclined wing plate 32 of the A-side tuning moving plate 1 is provided at the magnetic field tuning circular hole 5. A side wing copper plate 23 corresponding to the inclined wing plate of the B-side tuning moving plate 4 is provided at the magnetic field tuning circular hole 5.

[0026] The copper plate 1 on side A, the copper plate 2 on side B, the tuning moving plate 3 on side A, and the tuning moving plate 4 on side B have cooling water channels inside, and each cooling water channel has a cooling water connector 6 at its inlet and outlet.

[0027] The tuning device for the high-power high-frequency power supply of this invention generates a highly concentrated, unidirectional alternating magnetic field between the two plates, especially in the area of ​​the magnetic field tuning hole 5, when high-frequency high currents in opposite directions flow through parallel copper plates A 1 and B 2, according to the "right-hand screw rule". This magnetic field tuning hole 5 is the "core" window of the device.

[0028] The A-side tuning plate 3 and the B-side tuning plate 4 are typically made of stacked ferrite or silicon steel sheets with high permeability and low loss, serving as movable magnetic yokes. Their distance from the magnetic field tuning hole 5 (i.e., the air gap) determines the magnitude of the magnetic reluctance of the loop formed by the magnetic field lines flowing out of the magnetic field hole and passing through the tuning plate.

[0029] When the A-side tuning moving plate 3 and the B-side tuning moving plate 4 move forward simultaneously (approaching the magnetic field tuning hole 5 at the same time): the air gap decreases, the magnetic reluctance decreases, the magnetic circuit becomes more "unobstructed," and the equivalent inductance increases. When the A-side tuning moving plate 3 and the B-side tuning moving plate 4 move out simultaneously (moving away from the magnetic field tuning hole 5 at the same time), the air gap increases, the magnetic reluctance increases, and the equivalent inductance decreases.

[0030] The A-side tuning moving plate 3 and the B-side tuning moving plate 4 move in and out at the same time: This ensures the symmetry of the magnetic circuit, avoids unilateral magnetic pull, and ensures smooth adjustment and uniform magnetic field.

[0031] A twin-screw synchronous drive mechanism can be used to simultaneously move the A-side tuning plate 3 and the B-side tuning plate 4 closer to or further away from the magnetic field tuning hole 5. The twin-screw synchronous drive mechanism includes two precision screws and a drive shaft. The two precision screws are arranged in parallel and pass through threaded holes or connected nut seats on the A-side tuning plate 3 and the B-side tuning plate 4, respectively. The drive shaft is connected to the ends of the two precision screws via a pair of identical synchronous gears or synchronous pulleys. The drive shaft is driven by a motor. When the motor drives the drive shaft to rotate, the synchronous gears or pulleys force the two precision screws to rotate at the same angle and speed. Because the precision screws have the same pitch, they transmit identical linear displacement to the tuning plates on both sides, achieving simultaneous movement of the A-side tuning plate 3 and the B-side tuning plate 4.

[0032] The tuning device for this high-power high-frequency power supply features a plate-type structure with inherently very small parasitic capacitance, making it less prone to unnecessary resonance. The tuning moving plate is constructed from stacked high-permeability, low-loss ferrite or silicon steel sheets, maintaining low loss even at 200kHz. The magnetic field is confined within a low-resistivity path formed by the copper plate and the moving plate, resulting in minimal magnetic leakage, concentrated energy, and high efficiency. It can withstand high-power tuning functions with currents ranging from 13000A to 18000A and frequencies up to 200kHz.

[0033] In summary, the tuning device of this utility model for a high-power high-frequency power supply does not rely on a wound coil, but directly uses the conductor plate current and a movable magnetic yoke to generate and adjust the magnetic field and equivalent inductance. It can withstand high-power tuning functions with currents of 13000A to 18000A and frequencies up to 200KHz, thus breaking through the loss and manufacturing bottleneck of traditional wound inductors under ultra-high frequency and ultra-high current conditions.

[0034] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any changes or modifications to the above embodiments within the scope of the essential spirit of the present utility model will fall within the scope of the claims of the present utility model.

Claims

1. A tuning device for a high-power high-frequency power supply, characterized in that, Includes copper plate A, copper plate B, tuning sliding plate A, and tuning sliding plate B, wherein: The copper plate on side A and the copper plate on side B are arranged opposite each other, one in front of the other, and an insulating layer is sandwiched between the copper plate on side A and the copper plate on side B. A magnetic field tuning circular hole is opened in the middle of the copper plate on side A, the copper plate on side B, and the insulating layer. The A-side tuning moving plate is movable back and forth and is disposed on the front side of the magnetic field tuning circular hole. The B-side tuning moving plate is movable back and forth and is disposed on the rear side of the magnetic field tuning circular hole. The A-side tuning moving plate and the B-side tuning moving plate simultaneously move closer to or further away from the magnetic field tuning circular hole. The copper plate on side A and the copper plate on side B are respectively provided with input copper busbars at one end and output copper busbars at the other end. When the input copper busbars of the copper plate on side A and the copper plate on side B receive high-frequency high current, an alternating magnetic field is generated at the magnetic field tuning hole. Tuning is achieved by the simultaneous movement of the tuning moving plate on side A and the tuning moving plate on side B.

2. The tuning device for a high-power high-frequency power supply according to claim 1, characterized in that, Both the A-side tuning moving plate and the B-side tuning moving plate include a middle plate and inclined wing plates connected to both sides thereon. The magnetic field tuning holes of the copper plate on side A and side B are respectively provided with side wing copper plates corresponding to the inclined wing plates.

3. The tuning device for a high-power high-frequency power supply according to claim 1, characterized in that, The copper plate on side A, the copper plate on side B, the tuning moving plate on side A, and the tuning moving plate on side B have cooling water channels inside, and each cooling water channel has a cooling water connector at its inlet and outlet.

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