CN216122226U

CN216122226U - IGBT double-unit transistor intermediate frequency power supply device

Info

Publication number: CN216122226U
Application number: CN202220274062.1U
Authority: CN
Inventors: 孙元磊
Original assignee: Shandong Huarui Electric Furnace Co ltd
Current assignee: Shandong Huarui Electric Furnace Co ltd
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-03-22
Anticipated expiration: 2032-02-11

Abstract

The utility model relates to the technical field of IGBT power equipment, and particularly discloses an IGBT double-unit transistor intermediate frequency power supply device which comprises a power supply box body, a silicon controlled rectifier, a self-cooling reactor, a module and a driving plate, wherein the side surface of the power supply box body is provided with a connecting end cover, the left side of the power supply box body is provided with a power supply controller, the upper part of the power supply controller is connected with a first connecting copper bar, the upper part of the first connecting copper bar is connected with a first current limiting mutual inductor, the middle part of the power supply box body is provided with a laminated bus bar, the rear part of the laminated bus bar is connected with a filter capacitor, the lower part of the laminated bus bar is connected with a strip plate, the upper part of the strip plate is provided with the driving plate, and the lower part of the driving plate is connected with the module. Meanwhile, the energy-saving performance of the medium-frequency power supply is improved, and the power consumption can be saved by 12% compared with that of a silicon controlled series electric furnace.

Description

IGBT double-unit transistor intermediate frequency power supply device

Technical Field

The utility model relates to the technical field of IGBT power equipment, in particular to an IGBT double-unit transistor intermediate-frequency power supply device.

Background

An IGBT intermediate frequency furnace is an induction melting furnace, applied to various nonferrous metals and various steels, utilizing an intermediate frequency power supply device to convert three-phase power frequency alternating current into direct current after rectification, then converting the direct current into adjustable intermediate frequency current to be supplied to intermediate frequency alternating current flowing through a capacitor and an induction coil, generating high-density magnetic lines in the induction coil and cutting metal materials contained in the induction coil to generate large eddy current in the metal materials, the eddy current also has some properties of the intermediate frequency current, free electrons of the metal flow in a metal body with resistance to generate heat, for example, a metal cylinder is placed in the induction coil with the alternating intermediate frequency current, the metal cylinder is not in direct contact with the induction coil, the temperature of the electrified coil is low, but the surface of the cylinder is heated or even melted, and the reddening and melting speed can be realized only by adjusting the frequency and the intensity of the current, the IGBT intermediate frequency power supply device can be a constant power output power supply, full power output can be achieved by adding a small amount of materials, and the full power output is always kept unchanged, so that the melting speed is high, series resonance is adopted in an inversion part, and the inversion voltage is high.

However, the existing power supply device still has some defects when in use, for example, the current-limiting inductor in the electric furnace is inverted by the thyristor, the electric furnace is easy to consume much power, and one driving plate is adopted to drive a plurality of modules, when the furnace body is short-circuited, ignited, penetrated by steel and burnt out by a water cable, the IGBT can be damaged, and a string of phenomenon appears, so that the maintenance cost is improved, and therefore, the intermediate frequency power supply device of the IGBT double-unit transistor is provided, and the problem provided in the above is solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an IGBT double-unit transistor intermediate frequency power supply device, which aims to solve the problem that the current-limiting inductor in the traditional silicon controlled rectifier series inverter electric furnace provided by the background technology is easy to cause large power consumption of the electric furnace, and a driving plate is adopted to drive a plurality of modules, so that when a furnace body is short-circuited, ignited, penetrated by steel and burnt out by a water cable, the IGBT can be damaged, and a string is exploded, thereby further improving the maintenance cost.

In order to achieve the purpose, the utility model provides the following technical scheme: an IGBT double-unit transistor intermediate frequency power supply device comprises a power supply box body, a power supply controller, a silicon controlled rectifier, a first current-limiting mutual inductor, a self-cooling reactor, a module and a drive plate, wherein connecting end covers are arranged on the side surfaces of the power supply box body, a display screen is arranged on the upper portions of the connecting end covers, a bottom connecting rod is arranged at the bottom of the power supply box body, the power supply controller is arranged on the left side of the power supply box body, a first connecting copper bar is connected to the upper portion of the power supply controller, the first current-limiting mutual inductor is connected to the upper portion of the first connecting copper bar, a supporting rod is connected to the left side of the power supply box body, the self-cooling reactor is arranged at the bottom of the supporting rod, a laminated bus bar is arranged in the middle of the power supply box body, a filter capacitor is connected to the rear portion of the laminated bus bar, a strip plate is connected to the lower portion of the laminated bus bar, a drive plate is arranged on the upper portion of the strip plate, and the lower portion of the drive plate is connected with the module, the power supply box is characterized in that a fixing frame is connected inside the power supply box, a second connecting copper bar is connected to the upper portion of the fixing frame, the lower end of the second connecting copper bar is connected with a resonant capacitor through a second current-limiting mutual inductor, and a first-stage conveying cooling water pipe is arranged at the bottom of the power supply box.

Preferably, base and lower base on the upper portion fixedly connected with of bracing piece, the middle part of base and lower base is connected with the silicon controlled rectifier on it, the upper portion of silicon controlled rectifier is connected with the second grade and carries the hose, and the inside of its silicon controlled rectifier is equipped with the basin, carries condenser tube and second grade through the one-level and carries the hose to cooperate, can realize cooling down the silicon controlled rectifier.

Preferably, the first connecting copper bar is connected with the second connecting copper bar through a fixing frame, and the upper parts of the first connecting copper bar and the second connecting copper bar are provided with mounting and fixing holes, so that the first connecting copper bar and the second connecting copper bar can be conveniently mounted and fixed.

Preferably, condenser tube is carried through embedded stainless steel installation pipe and fixed knot in the upper portion that condenser tube was carried to the one-level and the flexible water pipe is carried with the second grade to be connected, condenser tube is carried to the one-level and is divided into inlet tube and outlet pipe, can realize that water carries condenser tube and second grade at the one-level and carry the flexible water pipe and carry out the circulation flow.

Preferably, the drive plate and the module are connected with the strip plate through the fastening bolts, and the drive plate and the module adopt a one-to-one working mode, so that the drive plate and the module are convenient to replace, and meanwhile, the maintenance cost is reduced.

Preferably, the upper end of the resonant capacitor is connected with the controllable silicon, the front part of the resonant capacitor is connected with the fixing frame, the safety of the IGBT module can be improved by utilizing the resonant capacitor, and the operation of the whole capacitor bank is not influenced due to the damage of the individual resonant capacitor.

Preferably, the rear portion of mount is connected with second grade delivery hose through embedded installation pipe, can install second grade delivery hose on the mount to realize the purpose of cooling.

Compared with the prior art, the utility model has the beneficial effects that:

(1) the IGBT double-unit intermediate frequency power supply adopts a mode that one drive plate drives one module, the reliability greatly exceeds that of the traditional single-tube IGBT intermediate frequency power supply, even if a furnace body is short-circuited, ignited and penetrated by steel and a water cable is blown, the IGBT cannot be damaged, the defect that the traditional single-tube IGBT intermediate frequency power supply is one-string in explosion is overcome, and the maintenance cost is reduced.

(2) The IGBT double-unit medium-frequency power supply cancels the current-limiting inductance in the electric furnace for inversion by the thyristor, improves the energy-saving property of the medium-frequency power supply, and can save 12 percent of power consumption compared with the electric furnace in series by the thyristor.

(3) The device has the advantages of small sound, strong overload capacity, no special requirement on the use environment, simpler use and maintenance, lower cost, and greatly prolonged service life of the intermediate frequency power supply device due to the use of the novel anhydrous reactor.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of a front view of the power supply box of the present invention;

FIG. 3 is a rear view of the power box of the present invention;

fig. 4 is a schematic view of the structure of the driving plate of the present invention.

In the figure: 1. a power supply box body; 2. connecting an end cover; 3. a display screen; 4. a bottom connecting rod; 5. a power supply controller; 6. a first connecting copper bar; 7. a first current limiting transformer; 8. a support bar; 9. a fixed mount; 10. an upper base; 11. a second-stage conveying soft water pipe; 12. silicon controlled rectifier; 13. a lower base; 14. a self-cooled reactor; 15. a strip plate; 16. a drive plate; 17. a module; 18. a laminated busbar; 19. a second current limiting transformer; 20. a resonant capacitor; 21. a second connecting copper bar; 22. a primary conveying cooling water pipe; 23. and a filter capacitor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: an IGBT double-unit transistor intermediate frequency power supply device comprises a power supply box body 1, a power supply controller 5, a silicon controlled rectifier 12, a first current-limiting mutual inductor 7, a self-cooling reactor 14, a module 17 and a drive plate 16, wherein the side surface of the power supply box body 1 is provided with a connecting end cover 2, the upper part of the connecting end cover 2 is provided with a display screen 3, the bottom of the power supply box body 1 is provided with a bottom connecting rod 4, the integral strength of the power supply box body 1 can be improved through the bottom connecting rod 4, the left side of the power supply box body 1 is provided with the power supply controller 5, the upper part of the power supply controller 5 is connected with a first connecting copper bar 6, the upper part of the first connecting copper bar 6 is connected with the first current-limiting mutual inductor 7, the safety of a power supply circuit can be improved through the first current-limiting mutual inductor 7, the left side of the power supply box body 1 is connected with a support rod 8, the bottom of the support rod 8 is provided with the self-cooling reactor 14, alternating current clutter in direct current can be removed completely through the self-cooling reactor 14, so that the current is prevented from changing, the middle part of the power supply box body 1 is provided with a laminated busbar 18, the rear part of the laminated busbar 18 is connected with a filter capacitor 23, the lower part of the laminated busbar 18 is connected with a strip plate 15, the upper part of the strip plate 15 is provided with a drive plate 16, the lower part of the drive plate 16 is connected with a module 17, the direct current of a power supply can be changed into alternating current by utilizing the drive plate 16 and the module 17, the power supply box body 1 is internally connected with a fixing frame 9, the upper part of the fixing frame 9 is connected with a second connecting copper bar 21, the lower end of the second connecting copper bar 21 is connected with a resonance capacitor 20 through a second current limiting mutual inductor 19, the second current limiting mutual inductor 19 can play a role in protecting the strip plate 15, the bottom of the power supply box body 1 is provided with a primary conveying cooling water pipe 22, the primary transport cooling water pipe 22 can be used for accelerating the water circulation.

Further, base 10 and lower base 13 are gone up to the upper portion fixedly connected with of bracing piece 8, and the middle part of base 10 and lower base 13 is connected with silicon controlled rectifier 12 on it, the upper portion of silicon controlled rectifier 12 is connected with second grade delivery soft water pipe 11, and its silicon controlled rectifier 12's inside is equipped with the basin, carries condenser tube 22 and second grade delivery soft water pipe 11 through the one-level and cooperatees, can realize cooling down silicon controlled rectifier 12.

Further, the first connecting copper bar 6 is connected with the second connecting copper bar 21 through the fixing frame 9, and the upper portions of the first connecting copper bar 6 and the second connecting copper bar 21 are provided with mounting and fixing holes, so that the first connecting copper bar 6 and the second connecting copper bar 21 can be mounted and fixed conveniently.

Further, the upper portion that condenser tube 22 was carried to the one-level is connected with second grade delivery hose 11 through embedded stainless steel installation pipe and fixed knot, condenser tube 22 is carried to the one-level and is divided into inlet tube and outlet pipe, can realize that water carries condenser tube 22 and second grade delivery hose 11 at the one-level and carries out the circulation flow.

Furthermore, the driving plate 16 and the module 17 are connected with the strip plate 15 through fastening bolts, and the driving plate 16 and the module 17 adopt a one-to-one working mode, so that the driving plate 16 and the module 17 can be conveniently replaced, and meanwhile, the maintenance cost is reduced.

Further, the upper end of the resonant capacitor 20 is connected with the thyristor 12, the front part of the resonant capacitor 20 is connected with a fixed frame, the resonant capacitor 20 can improve the safety of the thyristor 12, and the operation of the whole capacitor bank is not affected due to the damage of the individual resonant capacitor 20.

Further, the rear portion of the fixing frame 9 is connected with the second-stage conveying soft water pipe 11 through an embedded mounting pipe, and the second-stage conveying soft water pipe 11 can be mounted on the fixing frame 9, so that the purpose of cooling is achieved.

The working principle is as follows: when the IGBT intermediate frequency power supply device is used, the power controller 5 is used for controlling the working state of the power supply device, the first connecting copper bar 6 and the second connecting copper bar 21 are used for realizing circuit mutual communication, the first current limiting mutual inductor 7 is used for improving the safety of a power supply circuit, the controllable silicon 12 can be installed and fixed on the upper base 10 and the lower base 13, the controllable silicon 12 is used for realizing the purpose of alternating current and direct current, the purpose of saving power consumption is realized, alternating noise in direct current can be completely removed through the self-cooling reactor 14, so that the current is prevented from changing, the driving plate 16 and the module 17 are fixed on the strip plate 15, a one-to-one working mode is adopted, the IGBT module is prevented from being exploded, the driving plate 16 and the module 17 are convenient to replace when being damaged, the maintenance cost is reduced, and the purpose of water circulation flowing can be realized through the primary conveying cooling water pipe 22 and the secondary soft water conveying pipe 11, the controllable silicon 12 can be cooled by the water tank, the service life of the power supply device can be prolonged, and the whole working process of the device is just the above, and the content which is not described in detail in the specification belongs to the prior art which is known by the professional technicians in the field.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a two unit transistor intermediate frequency power supply unit of IGBT, includes power supply box (1), power controller (5), silicon controlled rectifier (12), first current-limiting transformer (7), self-cooling reactor (14), module (17) and drive plate (16), its characterized in that: the power supply box is characterized in that connecting end covers (2) are arranged on the side faces of the power supply box body (1), a display screen (3) is arranged on the upper portions of the connecting end covers (2), a bottom connecting rod (4) is arranged at the bottom of the power supply box body (1), a power supply controller (5) is arranged on the left side of the power supply box body (1), a first connecting copper bar (6) is connected to the upper portion of the power supply controller (5), a first current-limiting mutual inductor (7) is connected to the upper portion of the first connecting copper bar (6), a supporting rod (8) is connected to the left side of the power supply box body (1), a self-cooling reactor (14) is arranged at the bottom of the supporting rod (8), a laminated busbar (18) is arranged in the middle of the power supply box body (1), a filter capacitor (23) is connected to the rear portion of the laminated busbar (18), a strip plate (15) is connected to the lower portion of the laminated busbar (18), and a drive plate (16) is arranged on the upper portion of the strip plate (15), the lower part of drive plate (16) is connected with module (17), the internal connection of power supply box (1) has mount (9), and the upper portion of its mount (9) is connected with second connection copper bar (21), the lower extreme of second connection copper bar (21) is connected with resonant capacitor (20) through second current-limiting transformer (19), the bottom of power supply box (1) is equipped with one-level transport cooling water pipe (22).

2. The intermediate frequency power supply device of an IGBT double-unit transistor according to claim 1, characterized in that: the upper portion fixedly connected with of bracing piece (8) goes up base (10) and lower base (13), and the middle part of base (10) and lower base (13) is connected with silicon controlled rectifier (12) on it, the upper portion of silicon controlled rectifier (12) is connected with second grade and carries soft water pipe (11), and the inside of its silicon controlled rectifier (12) is equipped with the basin.

3. The intermediate frequency power supply device of an IGBT double-unit transistor according to claim 1, characterized in that: the first connecting copper bar (6) is connected with the second connecting copper bar (21) through a fixing frame (9), and mounting fixing holes are formed in the upper portions of the first connecting copper bar (6) and the second connecting copper bar (21).

4. The intermediate frequency power supply device of an IGBT double-unit transistor according to claim 1, characterized in that: the upper portion that condenser tube (22) was carried to the one-level is connected with second grade delivery hose (11) through embedded stainless steel installation pipe and fixed knot, condenser tube (22) is carried to the one-level and is divided into inlet tube and outlet pipe.

5. The intermediate frequency power supply device of an IGBT double-unit transistor according to claim 1, characterized in that: the driving plate (16) and the module (17) are connected with the strip plate (15) through fastening bolts, and the driving plate (16) and the module (17) adopt a one-to-one working mode.

6. The intermediate frequency power supply device of an IGBT double-unit transistor according to claim 1, characterized in that: the upper end of the resonance capacitor (20) is connected with a controllable silicon (12), and the front part of the resonance capacitor (20) is connected with a fixing frame.

7. The intermediate frequency power supply device of an IGBT double-unit transistor according to claim 1, characterized in that: the rear part of the fixing frame (9) is connected with a second-stage conveying soft water pipe (11) through an embedded installation pipe.