Three-phase intermediate-frequency large-current electronic switch structure

Abstract

The utility model discloses a three-phase intermediate-frequency large-current electronic switch structure, and relates to the technical field of power electronic switches. The three-phase intermediate-frequency large-current electronic switch structure comprises a three-phase intermediate-frequency large-current power electronic switch, a water-cooling heat dissipation component, a driving circuit, a heat dissipation protective cover, a fastening and insulating component, a wiring connecting terminal and the like. A heat dissipation stainless steel cover is installed on the top of the three-phase medium-frequency large-current power electronic switch through bolts, a driving circuit is arranged in the heat dissipation stainless steel cover, an upper insulating and fixed resin plate and a lower insulating and fixed resin plate are arranged below the driving circuit, two layers of aluminum bars integrating large current conduction and heat dissipation are clamped between the resin plates, and a fast thyristor is clamped between the aluminum bars. The resin plate, the aluminum bar and the fast thyristor are connected together through a screw fastener subjected to insulation treatment, and a Z-shaped take-up assembly is adopted in the wiring part. The three-phase intermediate-frequency large-current electronic power switch has the advantages of high working frequency (1-3kHz), large current (2kA), stable and reliable working and convenient installation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power electronic switch, especially relates to a three -phase medium frequency large current electronic switch structure. BACKGROUND

[0002] In the field of power electronics, three -phase medium frequency large current power electronic switch as key control element, is widely used in industrial automation, power transmission and distribution and many other aspects.

[0003] The existing three -phase medium frequency large current power electronic switch is mostly used in wiring design, adopts power electronic switch and installs composition in two rows, and the conduction and heat dissipation are divided into two parts, this design method is simple, but inconvenient for the work according to the field installation space, construction environment in practical application, when the field installation space is limited or the construction environment does not meet the requirement, three single -phase installation power electronic switch cannot be installed in two rows, or the heat dissipation device cannot be arranged, leading to installation difficulty, therefore, we propose a three -phase medium frequency large current electronic switch structure. UTILITY MODEL CONTENTS

[0004] The utility model discloses a three -phase medium frequency large current electronic switch structure can solve the existing three -phase medium frequency large current power electronic switch, mostly adopts power electronic switch and installs composition in two rows, and the conduction and heat dissipation are divided into two parts, this design method is simple, but inconvenient for the work according to the field installation space, construction environment in practical application, when the field installation space is limited or the construction environment does not meet the requirement, three single -phase installation power electronic switch cannot be installed in two rows, or the heat dissipation device cannot be arranged, leading to installation difficulty.

[0005] To realize the above -mentioned purpose, the utility model provides the following technical scheme: a three -phase medium frequency large current electronic switch structure, comprising: three -phase medium frequency large current power electronic switch, three -phase medium frequency large current power electronic switch upper part is control module lower part is main on-off conductor;

[0006] Control module includes heat dissipation stainless steel cover, take -up group, drive board, and heat dissipation stainless steel cover is divided into bottom plate and upper cover two parts, and drive board is located in the cover, and take -up group is located on heat dissipation stainless steel cover;

[0007] Heat dissipation stainless steel cover contains drive circuit, and drive circuit has the upper and lower two layers insulation and fixed resin plate, and two layers of aluminum row that pass large current and dissipate heat are clamped in resin plate middle;

[0008] The main on-off conductor comprises conductive water-cooled busbars, fast thyristors, fixed insulating plates and fixed insulating bolts, the fast thyristors are located in the middle of the two conductive water-cooled busbars and are installed in a positive and negative manner, the conductive water-cooled busbars are located in the middle of the two epoxy resin plates, and the above devices are fixed through special insulating bolts which are inserted into the elements to be fixed in a manner of sleeving into two layers of high-voltage insulating heat-shrinkable sleeves and a layer of glass fiber tubes;

[0009] The fast thyristors are clamped in the middle of the aluminum bars, and the resin plates, the aluminum bars and the fast thyristors are connected together through the insulating treated screw fasteners, and the wiring part adopts a "Z" shape wire collecting assembly.

[0010] Preferably, the three-phase medium-frequency large-current power electronic switch is designed as a whole module by three single-phase installed electronic switches, the three single-phase switches are connected through fixed insulating plates and fixed insulating bolts, and the driving plate is located above the three-phase medium-frequency large-current power electronic switch.

[0011] Preferably, the fixed insulating bolt is a special bolt which is insulated in a manner of sleeving into two layers of high-voltage insulating heat-shrinkable sleeves and a layer of glass fiber tubes.

[0012] Preferably, the conductive water-cooled busbar is made of six-system aluminum alloy, and two water nozzles of the conductive water-cooled busbar are connected to a cooling liquid water pipe.

[0013] Preferably, the conductive water-cooled busbar and the fast thyristor combination are a single fast thyristor.

[0014] Compared with the prior art, the three-phase medium-frequency large-current electronic switch structure has the beneficial effects that:

[0015] 1. The three-phase medium-frequency large-current electronic switch structure is composed of three single-phase installed power electronic switches, the installation of the three-phase medium-frequency large-current power electronic switch device is simple, the three single-phase installed power electronic switches are designed as a whole module, and the whole module can be used only after being fixed once, so that the convenience is improved.

[0016] 2. The three-phase medium-frequency large-current electronic switch structure adopts six-system aluminum profiles as current conductors and uses the six-system aluminum profiles as water-cooled heat dissipation devices, so that the volume and weight of the switch device are greatly reduced, and the installation space is saved and the weight is light.

[0017] 3. The three-phase medium-frequency large-current electronic switch structure adopts a 304 stainless steel heat dissipation stainless steel cover for the driving plate of the medium-frequency large-current power electronic switch device, so that the heat dissipation problem of the driving part is solved, the shielding and anti-interference effects are achieved, and the reliability is high and the service life is long. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model is further illustrated below in combination with the drawings and embodiments:

[0019] Figure 1 It is the radiating stainless steel cover structure schematic view of the utility model;

[0020] Figure 2 It is the take-up group structure schematic view of the utility model;

[0021] Figure 3 It is the conductive water-cooled busbar structure schematic view of the utility model;

[0022] Figure 4 It is the fixed insulating plate structure schematic view of the utility model;

[0023] Figure 5 It is the drive plate structure schematic view of the utility model.

[0024] Reference signs: 1, three-phase medium-frequency large-current power electronic switch;2, radiating stainless steel cover;3, take-up group;4, drive plate;5, conductive water-cooled busbar;6, fast thyristor;7, fixed insulating plate;8, fixed insulating bolt. Specific implementation

[0025] This part will describe the specific embodiments of the utility model in detail, the preferred embodiment of the utility model is shown in the drawings, the role of the drawings is to supplement the description of the written part with graphics, so that people can intuitively and visually understand each technical feature and overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0026] In the description of the utility model, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. based on the orientation or position relationship shown in the drawings, is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as the limitation of the utility model.

[0027] In the description of the utility model, greater than, less than, more than, etc. is understood as not including the number, above, below, etc. is understood as including the number. If it is described to the first, second, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0028] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection, etc. should be understood broadly, and the person skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0029] Referring to Figures 1-5 The utility model provides a technical scheme: a three -phase medium frequency large current electronic switch structure, including three -phase medium frequency large current power electronic switch 1, three -phase medium frequency large current power electronic switch 1 upper part is control module lower part is main on -off conductor,

[0030] Control module includes heat dissipation stainless steel cover 2, take -up group 3, drive board 4, heat dissipation stainless steel cover 2 is divided into bottom plate and upper cover two parts, drive board 4 is located in the cover, and take -up group is located on heat dissipation stainless steel cover 2;

[0031] Heat dissipation stainless steel cover contains drive circuit, and drive circuit has the upper and lower two layers of insulating and fixed resin plates, and two layers of aluminum bars that pass large current and dissipate heat are clamped in the resin plate;

[0032] Main on -off conductor includes conductive water -cooling busbar 5, fast thyristor 6, fixed insulating plate 7, fixed insulating bolt 8, fast thyristor 6 is located in the middle of two conductive water -cooling busbars 5, adopts two positive and negative installation mode, and conductive water -cooling busbar 5 is located in the middle of two epoxy resin plates, and the above devices are fixed through special insulating screw rod, and the special insulating screw rod is inserted into the element to be fixed in the mode of being sleeved into two layers of high-voltage insulating heat shrink sleeve and a layer of glass fiber tube;

[0033] The fast thyristor is clamped in the middle of the aluminum bar, and the resin plate, the aluminum bar and the fast thyristor are connected together by the insulating treated screw fastener, and the wiring part adopts the "Z" shape take -up assembly;

[0034] Three -phase medium frequency large current power electronic switch 1 is designed as a whole module by three single -phase installed electronic switches, and the three single -phase switches are connected by fixed insulating plate 7 and fixed insulating bolt 8, and drive board 4 is located above three -phase medium frequency large current power electronic switch.

[0035] Fixed insulating bolt 8 is a special bolt, and insulation is carried out in the mode of being sleeved into two layers of high-voltage insulating heat shrink sleeve and a layer of glass fiber tube.

[0036] Conductive water -cooling busbar 5 is made of six series aluminum alloy, and two water nozzles of conductive water -cooling busbar 5 are connected to one -in and one -out cooling liquid water pipe.

[0037] Conductive water -cooling busbar 5 and fast thyristor 6 combination, single fast thyristor 6.

[0038] In use of the device, through the ingenious collocation of the driving plate, the fast thyristor and the water-cooled conductive aluminum row, a large-current power electronic switch driving device with unique appearance and convenient use is designed, which has the characteristics of low cost, strong anti-interference performance, high reliability, small size and long service life. The three-phase medium-frequency large-current power electronic switch device is integrated with three power electronic switches, which is unique. The fixed part of the three-phase medium-frequency large-current power electronic switch device adopts 304 stainless steel screw, in order to ensure its insulation, two layers of high-voltage heat shrinkable sleeve and a layer of glass fiber tube are sleeved on the screw, which is also a unique fixed and insulated way. The three-phase medium-frequency large-current power electronic switch device adopts the design of three-phase three switches in one whole, which makes it more practical and convenient in installation and application. The three-phase medium-frequency large-current power electronic switch device has been running on more than 600 medium-frequency devices with hundreds of kVA for 173 sets, and has excellent running performance.

[0039] The traditional three-phase power electronic switch is composed of three single-phase installed power electronic switches. The three-phase medium-frequency large-current power electronic switch device solves the problem of complicated installation and designs three single-phase installed power electronic switches as a whole module, which can be used only by fixing once, improving the convenience.

[0040] The three-phase medium-frequency large-current power electronic switch device uses six-system aluminum profiles as current conductors and also as water-cooled heat dissipation devices, thereby greatly reducing the volume and weight of the switch device, saving installation space and reducing weight.

[0041] The medium-frequency large-current power electronic switch device driving plate uses 304 stainless steel heat dissipation stainless steel cover, which not only solves the heat dissipation problem of the driving part, but also has the functions of shielding and anti-interference, and has the advantages of high reliability and long service life.

[0042] Working principle: After the driving part of the three-phase medium-frequency large-current power electronic switch device is connected to the direct current power supply, it is driven and controlled by light control signals, and the driving part and the large-current part are isolated by using an epoxy resin plate with good insulation and high hardness. The large-current part adopts two unidirectional fast thyristors installed in opposite directions. Since the alternating current power supply is a current that changes periodically with time, in the positive direction, the current flows through the fast thyristor installed in the positive direction through the water-cooled aluminum row; in the reverse direction, the current flows through the fast thyristor installed in the reverse direction through the water-cooled aluminum row, thereby ensuring the integrity of the alternating current.

[0043] The utility model embodiment makes the detailed explanation in combination with the drawing, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range of ordinary skill in the art person who has possessed under the premise of not departing from the utility model tenet.

Claims

1. A three-phase medium frequency high current electronic switch structure, characterized in that, The three-phase medium-frequency large-current power electronic switch (1) includes a control module at the upper part and a main on-off conductor at the lower part. The control module includes a heat-dissipation stainless steel cover (2), a take-up group (3), and a drive board (4). The heat-dissipation stainless steel cover (2) is divided into a bottom plate and an upper cover. The drive board (4) is located in the cover, and the take-up group is located on the heat-dissipation stainless steel cover (2). The heat-dissipation stainless steel cover contains a drive circuit, and the drive circuit has two layers of insulating and fixed resin plates below. The two layers of aluminum bars for passing large current and dissipating heat are sandwiched in the resin plates. The main on-off conductor includes a conductive water-cooled busbar (5), a fast thyristor (6), a fixed insulating plate (7), and a fixed insulating bolt (8). The fast thyristor (6) is located between the two conductive water-cooled busbars (5) and is installed in a positive and negative manner. The conductive water-cooled busbar (5) is located between the two epoxy resin plates. The fast thyristor is sandwiched in the aluminum bar, and the screw fastener with insulation treatment connects the resin plate, the aluminum bar, and the fast thyristor together. The wiring part uses a "Z"-shaped take-up assembly.

2. The structure of a three-phase medium-frequency large-current electronic switch according to claim 1, characterized in that: The three-phase medium-frequency large-current power electronic switch (1) is designed as a whole module by three single-phase electronic switches. The three single-phase switches are connected by the fixed insulating plate (7) and the fixed insulating bolt (8). The drive board (4) is located above the three-phase medium-frequency large-current power electronic switch.

3. The three-phase medium-frequency large-current electronic switch structure according to claim 1, characterized in that: The fixed insulating bolt (8) is a special bolt, which is insulated by sleeving two layers of high-voltage insulating heat-shrinkable sleeves and a layer of glass fiber tube.

4. The three-phase medium-frequency large-current electronic switch structure according to claim 1, characterized in that: The conductive water-cooled busbar (5) is made of six-system aluminum alloy. The two water nozzles of the conductive water-cooled busbar (5) are connected to a one-in-one-out cooling liquid water pipe.

5. The three-phase medium frequency large current electronic switch structure according to claim 1, characterized in that: The conductive water-cooled busbar (5) and the fast thyristor (6) combination body are single fast thyristors (6).

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