CN219145270U - Silicon controlled series resonance power unit - Google Patents
Silicon controlled series resonance power unit Download PDFInfo
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- CN219145270U CN219145270U CN202223338238.4U CN202223338238U CN219145270U CN 219145270 U CN219145270 U CN 219145270U CN 202223338238 U CN202223338238 U CN 202223338238U CN 219145270 U CN219145270 U CN 219145270U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to the technical field of power electronics, in particular to a silicon controlled series resonance power unit which comprises a mounting frame, a diode component, a silicon controlled component, a current limiting component, a filtering component and two conductive copper plates, wherein the mounting frame comprises two fixing plates, a shell, a plurality of first connecting plates and six second connecting plates, and the current limiting component and the filtering component are packaged in the shell. The silicon controlled series resonance power unit provided by the utility model integrates the diode component, the silicon controlled component, the current limiting component, the filtering component and the conductive copper plate on an independent mounting frame, so that the inverter circuit is integrated into a modularized component, and one or more power units with the same inverter circuit power and the rectifying circuit can be loaded to form an intermediate frequency power supply device according to the heating power of the induction furnace body so as to match with induction furnace bodies with different heating powers, and the output power of the intermediate frequency power supply device can be flexibly prepared.
Description
Technical Field
The utility model relates to the technical field of power electronics, in particular to a silicon controlled series resonance power unit.
Background
The principle of the medium frequency induction furnace is electromagnetic induction, the current medium frequency induction furnace is generally composed of a medium frequency power supply device and an induction furnace body, the medium frequency power supply device comprises a rectifying circuit composed of a plurality of thyristors and an inverter circuit composed of a resonant capacitor and the thyristors, the rectifying circuit of the medium frequency power supply device rectifies 380V three-phase alternating current to obtain direct current with voltage of about 510V, the direct current is inverted by the inverter circuit to obtain single-phase alternating current, and the alternating current is input into an inductor to heat and melt metal in the induction furnace body. The inverter circuit power of the traditional intermediate frequency power supply device is fixed and cannot be matched with an induction furnace body with heating power larger than that of the inverter circuit power of the intermediate frequency power supply device.
Disclosure of Invention
The utility model aims to solve the problems and provide a silicon controlled series resonance power unit, which integrates an inverter circuit into a modularized assembly, and is convenient for flexibly preparing the output power of an intermediate frequency power supply device according to the heating power of an induction furnace body.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a silicon controlled rectifier series resonance power unit, includes mounting bracket, diode subassembly, silicon controlled rectifier subassembly, current limiting subassembly, filtering subassembly and two electrically conductive copper, and the mounting bracket includes two fixed plates, a casing, a plurality of first connecting plates and six second connecting plates, and two fixed plates set up in interval one by one, and the casing is fixed in the fixed plate rear side through first connecting plate, and current limiting subassembly and filtering subassembly encapsulation are in the casing; three second connecting plates are fixed on the front side of each fixing plate at intervals, two conductive copper plates are arranged on the front side of the fixing plate at intervals one by one, each diode component comprises a first diode and a second diode, each diode component comprises a first silicon controlled rectifier, a second silicon controlled rectifier, a third silicon controlled rectifier and a fourth silicon controlled rectifier, the first diode, the first silicon controlled rectifier and the second silicon controlled rectifier are connected in parallel, the second diode, the third silicon controlled rectifier and the fourth silicon controlled rectifier are connected in parallel, the first diode, the second diode, the first silicon controlled rectifier, the second silicon controlled rectifier, the third silicon controlled rectifier and the fourth silicon controlled rectifier form an inverter circuit and are correspondingly connected with the conductive copper plates in a conductive mode, the first diode and the second diode are arranged one by one at intervals, and the first diode and the second diode are respectively clamped between a pair of water cooling blocks; each of the first silicon controlled rectifier, the second silicon controlled rectifier, the third silicon controlled rectifier and the fourth silicon controlled rectifier is clamped between a pair of water cooling blocks, and each pair of water cooling blocks is correspondingly clamped between the conductive copper plate and the second connecting plate.
Based on the technical scheme, the utility model can also be improved as follows:
further, a plurality of mounting holes are formed in each fixing plate and used for allowing screws to penetrate through to mount the power unit, two first connecting plates are fixed on the rear side of each fixing plate at intervals through the screws, the shell is fixedly connected with the first connecting plates through the screws, and the current limiting component and the filtering component are packaged in the shell through polyurethane; the material of fixed plate is copper material, and the material of first connecting plate and second connecting plate is aluminium alloy.
Further, an insulating block is arranged between the two conductive copper plates in a clamping mode, and an insulating material layer is arranged between the water cooling block and the conductive copper plates.
Further, the mounting frame further comprises three vertical connecting frames, each vertical connecting frame comprises two connecting rods and two connecting blocks sleeved on the connecting rods, one connecting rod penetrates through the second connecting plates from top to bottom, threads are arranged at two ends of the connecting rod, nuts are screwed on two ends of the connecting rod, and the second connecting plates are vertically clamped between the two connecting blocks.
Further, the power unit is provided with a first input end and a second input end, the first input end and the second input end are correspondingly connected with the two conductive copper plates in a conductive mode, the filter assembly comprises a first resistor, a fourth capacitor and a fifth capacitor, and the fourth capacitor and the fifth capacitor are connected between the first input end and the second input end of the power unit in series.
Further, the current limiting component comprises a first inductor, a second inductor and a third inductor, wherein the cathode of the first controllable silicon is connected with one end of the third inductor through the first inductor, and the connecting end of the third inductor and the first inductor is connected with the anode of the third controllable silicon through the second inductor; the other end of the third inductor is connected with one end of the first resistor, and the other end of the first resistor is connected with the connecting ends of the fourth capacitor and the fifth capacitor.
Further, the silicon controlled series resonance power unit further comprises a current stabilizing circuit, the current stabilizing circuit comprises a first capacitor, a second capacitor and a third capacitor, one ends of the first capacitor and the second capacitor are connected, the connection ends of the first capacitor and the second capacitor are grounded to form a high-frequency filtering structure, the high-frequency filtering structure is connected with the first capacitor in parallel, one end of the high-frequency filtering structure is connected with the first input end of the power unit, and the other end of the high-frequency filtering structure is connected with the second input end of the power unit.
Further, the other end of the high-frequency filtering structure is connected with a smoothing reactor.
Further, the silicon controlled series resonance power unit further comprises two overvoltage protection circuit components connected with the diode components, the two overvoltage protection circuit components have the same circuit structure, one overvoltage protection circuit component comprises a second resistor, a third resistor, a sixth capacitor and a third diode, the second resistor, the third resistor and the third diode are connected in series, the connecting end of the second resistor and the third resistor is connected with the cathode of the first diode through the sixth capacitor, and the cathode of the third diode is connected with the anode of the first diode.
The beneficial effects of the utility model are as follows:
the silicon controlled series resonance power unit provided by the utility model integrates the diode component, the silicon controlled component, the current limiting component, the filtering component and the conductive copper plate on an independent mounting frame, so that the inverter circuit is integrated into a modularized component, and one or more power units with the same inverter circuit power and the rectifying circuit can be loaded to form an intermediate frequency power supply device according to the heating power of the induction furnace body so as to match with induction furnace bodies with different heating powers, and the output power of the intermediate frequency power supply device can be flexibly prepared.
Drawings
The utility model will be further described with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of a series resonant power cell of a silicon controlled rectifier according to a preferred embodiment of the present utility model;
fig. 2 is a schematic circuit diagram of an intermediate frequency power supply formed by a plurality of power units and a rectifying circuit in fig. 1;
FIG. 3 is a schematic circuit diagram of a rectifier circuit;
FIG. 4 is a schematic circuit diagram of the power cell of FIG. 1;
FIG. 5 is a schematic circuit diagram of a further modification of the power cell of FIG. 1;
in the figure: 100. a power unit; 101. a first input; 102. a second input terminal; 11. a fixing plate; 110. a mounting hole; 12. a housing; 13. a first connection plate; 14. a second connecting plate; 15. a vertical connecting frame; 151. a connecting rod; 152. a connecting block; 20. a diode assembly; 30. a thyristor assembly; 40. a conductive copper plate; 41. an insulating block; 50. a water cooling block; 51. a pipe; 60. a current stabilizing circuit; 70. an overvoltage protection circuit; 200. and a rectifying circuit.
Detailed Description
The utility model will now be described in further detail with reference to the drawings and examples, which are simplified schematic illustrations of the basic structure of the utility model, which are presented only by way of illustration, and thus show only the structures that are relevant to the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
As shown in fig. 1 and 4, a silicon controlled series resonant power unit 100 according to a preferred embodiment of the present utility model is configured to invert dc power, and includes a mounting frame, a diode assembly 20, a silicon controlled assembly 30, a current limiting assembly, a filtering assembly, and two conductive copper plates 40.
Fig. 2 is a schematic circuit diagram of an intermediate frequency power supply device formed by a plurality of power units 100 and a rectifying circuit 200 in fig. 1, wherein the output end of the rectifying circuit 200 is connected in parallel with a plurality of power units 100 with identical circuit structures, each power unit 100 has the same circuit structure, the rectifying circuit 200 comprises a plurality of thyristors G, the input end of the rectifying circuit 200 is connected with a three-phase ac power supply, and the three-phase ac power supply adopts a conventional 380V three-phase ac power supply. In addition, the rectifying circuit 200 is not modified in the present utility model, and the specific circuit structure thereof can be referred to the circuit diagram shown in fig. 3, so that no further discussion will be made herein.
The mounting frame comprises two fixing plates 11, a shell 12, four first connecting plates 13 and six second connecting plates 14, wherein the two fixing plates 11 are arranged at intervals one above the other, and each fixing plate 11 is provided with a plurality of mounting holes 110 for screws to penetrate through to mount the power unit 100; the shell 12 is fixed on the rear side of the fixed plates 11 through four first connecting plates 13, two first connecting plates 13 are fixed on the rear side of each fixed plate 11 at intervals through screws, and the shell 12 is fixedly connected with the first connecting plates 13 through screws; the material of the fixing plate 11 may be a copper plate, and the material of the first connecting plate 13 and the second connecting plate 14 may be an aluminum profile. Three second connecting plates 14 are fixed on the front side of each fixing plate 11 at intervals by screws, two conductive copper plates 40 are arranged on the front side of the fixing plate 11 at intervals one by one, and an insulating block 41 is arranged between the two conductive copper plates.
The diode assembly 20 includes a first diode D1 and a second diode D2, the thyristor assembly 30 includes a first thyristor G1, a second thyristor G2, a third thyristor G3 and a fourth thyristor G4, the first diode D1, the first thyristor G1, the second thyristor G2 are connected in parallel, the second diode D2, the third thyristor G3, the fourth thyristor G4 are connected in parallel, and the inverter circuit is composed of the first diode D1, the second diode D2, the first thyristor G1, the second thyristor G2, the third thyristor G3 and the fourth thyristor G4 and is correspondingly connected with the conductive copper plate 40 in a conductive manner, in this embodiment, the inverter circuit power of each power unit 100 is 500KW. It should be noted that the conversion process of the electrical signal by the thyristor assembly 30 in the present utility model is identical to the conversion process of the inverter circuit in the prior art, and thus, a description thereof will not be repeated herein. The first diode D1 and the second diode D2 are arranged at intervals one above the other, and the first diode D1 and the second diode D2 are respectively clamped between a pair of water cooling blocks 50; each of the first silicon controlled rectifier G1, the second silicon controlled rectifier G2, the third silicon controlled rectifier G3 and the fourth silicon controlled rectifier G4 is clamped between a pair of water cooling blocks 50, each pair of water cooling blocks 50 is correspondingly clamped between the conductive copper plate 40 and the second connecting plate 14, an insulating material layer is arranged between the water cooling blocks 50 and the conductive copper plate 40, and the water cooling blocks 50 are communicated with a water pump and a water tank (not shown) through pipelines 51 and are used for radiating heat of the first diode D1, the second diode D2, the first silicon controlled rectifier G1, the second silicon controlled rectifier G2, the third silicon controlled rectifier G3 and the fourth silicon controlled rectifier G4.
Preferably, the mounting rack further comprises three vertical connecting frames 15, each vertical connecting frame 15 comprises two connecting rods 151 and two connecting blocks 152 sleeved on the connecting rods 151, one connecting rod 151 penetrates through the second connecting plate 14 up and down, two ends of the connecting rod 151 are provided with threads and are in threaded connection with nuts, and the second connecting plate 14 is vertically clamped between the two connecting blocks 152 by arranging the vertical connecting frames 15.
The current limiting assembly and the filter assembly are encapsulated in the case 12 by polyurethane, and have excellent impact resistance, water resistance, heat resistance, and stable electrical properties. As shown in fig. 4, which is a schematic circuit diagram of the power unit 100 in fig. 1, the power unit 100 has a first input terminal 101 and a second input terminal 102 correspondingly connected to the output terminal of the rectifying circuit 200, the first input terminal 101 and the second input terminal 102 are correspondingly connected to the two conductive copper plates 40 in a conductive manner, the filtering component includes a first resistor R1, a fourth capacitor C4, and a fifth capacitor C5, and the fourth capacitor C4 and the fifth capacitor C5 are connected in series between the first input terminal 101 and the second input terminal 102 of the power unit 100; the first resistor R1 is a power resistor with a small resistance value, and the resistance value of the first resistor R1 can be 0-10Ω, and is used for absorbing the peak value of the power unit 100 in the process of converting the electrical signal, so as to play a role in smoothing the electrical signal.
The current limiting component comprises a first inductor L1, a second inductor L2 and a third inductor L3, wherein the cathode of the first controllable silicon G1 is connected with one end of the third inductor L3 through the first inductor L1, and the connecting end of the third inductor L3 and the first inductor L1 is connected with the anode of the third controllable silicon G3 through the second inductor L2; the other end of the third inductor L3 is connected with one end of the first resistor R1, and the other end of the first resistor R1 is connected with the connecting end of the fourth capacitor C4 and the fifth capacitor C5. The time of the current change of the thyristor assembly 30 can be limited to a safe level by arranging the first inductor L1, the second inductor L2 and the third inductor L3, and the voltage at two ends of the inverter thyristor is divided and reduced in the process of line fault, so that the damage of components is avoided.
Preferably, as shown in fig. 5, the power unit 100 further includes a current stabilizing circuit 60 connected between the rectifying circuit 200 and the power unit 100, the current stabilizing circuit 60 includes a first capacitor C1, a second capacitor C2 and a third capacitor C3, one ends of the first capacitor C2 and the second capacitor C3 are connected, and the connection ends of the first capacitor C2 and the second capacitor C3 are grounded to form a high-frequency filtering structure for filtering high-frequency ripple waves in the dc power obtained after rectification. The high-frequency filtering structure is connected in parallel with the first capacitor C1, and one end of the high-frequency filtering structure is connected with the first input end 101 of the power unit 100, and the other end of the high-frequency filtering structure is connected with the second input end 102 of the power unit 100.
Preferably, a smoothing reactor L4 is connected between the other end of the high-frequency filtering structure and the output end of the rectifying circuit 200, where the smoothing reactor L4 is used to filter the electric signal rectified by the rectifying thyristor, so as to effectively reduce clutter signals in the electric signal.
Preferably, as shown in fig. 5, the power unit 100 further includes two overvoltage protection circuit assemblies 70 connected to the diode assemblies 20, where the overvoltage protection circuit assemblies 70 are used to limit the voltage rising rate of the circuit to be too large, and the voltage rising rate is limited by utilizing the characteristic that the voltages at the two ends of the capacitor cannot be suddenly changed, so as to ensure safe operation of the thyristors. The two overvoltage protection circuit assemblies 70 have the same circuit structure, wherein one overvoltage protection circuit assembly 70 comprises a second resistor R2, a third resistor R3, a sixth capacitor C6 and a third diode D3, the second resistor R2, the third resistor R3 and the third diode D3 are connected in series, the connection end of the second resistor R2 and the third resistor R3 is connected with the cathode of the first diode D1 through the sixth capacitor C6, and the cathode of the third diode D3 is connected with the anode of the first diode D1.
The silicon controlled series resonant power unit 100 provided by the utility model integrates the diode component 20, the silicon controlled component 30, the current limiting component, the filtering component and the conductive copper plate 40 on an independent mounting frame, so that the inverter circuit is integrated into a modularized component, and one or more power units 100 with the same inverter circuit power and the rectifier circuit 200 can be loaded to form an intermediate frequency power supply device according to the heating power of the induction furnace body so as to match with the induction furnace body and flexibly prepare the output power of the intermediate frequency power supply device.
The above description of the embodiments of the present utility model, which is not related to the present utility model, belongs to the technology known in the art, and may be implemented with reference to the technology known in the art.
The above-described preferred embodiments according to the present utility model are intended to suggest that, from the above description, various changes and modifications can be made by the person skilled in the art without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (9)
1. The utility model provides a silicon controlled rectifier series resonance power unit, includes mounting bracket, diode subassembly, silicon controlled rectifier subassembly, its characterized in that: the installation frame comprises two fixing plates, a shell, a plurality of first connecting plates and six second connecting plates, the two fixing plates are arranged at intervals one above the other, the shell is fixed on the rear side of the fixing plates through the first connecting plates, and the current limiting assembly and the filtering assembly are packaged in the shell; three second connecting plates are fixed on the front side of each fixing plate at intervals, two conductive copper plates are arranged on the front side of the fixing plate at intervals one by one, each diode component comprises a first diode and a second diode, each diode component comprises a first silicon controlled rectifier, a second silicon controlled rectifier, a third silicon controlled rectifier and a fourth silicon controlled rectifier, the first diode, the first silicon controlled rectifier and the second silicon controlled rectifier are connected in parallel, the second diode, the third silicon controlled rectifier and the fourth silicon controlled rectifier are connected in parallel, the first diode, the second diode, the first silicon controlled rectifier, the second silicon controlled rectifier, the third silicon controlled rectifier and the fourth silicon controlled rectifier form an inverter circuit and are correspondingly connected with the conductive copper plates in a conductive mode, the first diode and the second diode are arranged one by one at intervals, and the first diode and the second diode are respectively clamped between a pair of water cooling blocks; each of the first silicon controlled rectifier, the second silicon controlled rectifier, the third silicon controlled rectifier and the fourth silicon controlled rectifier is clamped between a pair of water cooling blocks, and each pair of water cooling blocks is correspondingly clamped between the conductive copper plate and the second connecting plate.
2. The thyristor series resonant power cell according to claim 1, wherein: each fixing plate is provided with a plurality of mounting holes for screws to penetrate through to mount the power unit, two first connecting plates are fixed on the rear side of each fixing plate at intervals through the screws, the shell is fixedly connected with the first connecting plates through the screws, and the current limiting component and the filtering component are packaged in the shell through polyurethane; the material of fixed plate is copper material, and the material of first connecting plate and second connecting plate is aluminium alloy.
3. The thyristor series resonant power cell of claim 2, wherein: an insulating block is clamped between the two conductive copper plates, and an insulating material layer is arranged between the water cooling block and the conductive copper plates.
4. A thyristor series resonant power cell according to claim 3 wherein: the mounting frame further comprises three vertical connecting frames, each vertical connecting frame comprises two connecting rods and two connecting blocks sleeved on the connecting rods, one connecting rod penetrates through the second connecting plates from top to bottom, threads are arranged at two ends of the connecting rod, nuts are screwed on the two ends of the connecting rod, and the second connecting plates are vertically clamped between the two connecting blocks.
5. The thyristor series resonant power cell according to claim 1, wherein: the power unit is provided with a first input end and a second input end, the first input end and the second input end are correspondingly connected with the two conductive copper plates in a conductive mode, the filter assembly comprises a first resistor, a fourth capacitor and a fifth capacitor, and the fourth capacitor and the fifth capacitor are connected between the first input end and the second input end of the power unit in series.
6. The thyristor series resonant power cell according to claim 5, wherein: the current limiting assembly comprises a first inductor, a second inductor and a third inductor, wherein the cathode of the first controllable silicon is connected with one end of the third inductor through the first inductor, and the connecting end of the third inductor and the first inductor is connected with the anode of the third controllable silicon through the second inductor; the other end of the third inductor is connected with one end of the first resistor, and the other end of the first resistor is connected with the connecting ends of the fourth capacitor and the fifth capacitor.
7. The thyristor series resonant power cell according to claim 6, wherein: the high-frequency filter structure is connected with the first capacitor in parallel, one end of the high-frequency filter structure is connected with the first input end of the power unit, and the other end of the high-frequency filter structure is connected with the second input end of the power unit.
8. The thyristor series resonant power cell according to claim 7, wherein: and the other end of the high-frequency filtering structure is connected with a smoothing reactor.
9. The thyristor series resonant power cell according to claim 8, wherein: the overvoltage protection circuit assembly comprises a second resistor, a third resistor, a sixth capacitor and a third diode, wherein the second resistor, the third resistor and the third diode are connected in series, the connecting end of the second resistor and the third resistor is connected with the cathode of the first diode through the sixth capacitor, and the cathode of the third diode is connected with the anode of the first diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223338238.4U CN219145270U (en) | 2022-12-14 | 2022-12-14 | Silicon controlled series resonance power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223338238.4U CN219145270U (en) | 2022-12-14 | 2022-12-14 | Silicon controlled series resonance power unit |
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| Publication Number | Publication Date |
|---|---|
| CN219145270U true CN219145270U (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223338238.4U Active CN219145270U (en) | 2022-12-14 | 2022-12-14 | Silicon controlled series resonance power unit |
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| Country | Link |
|---|---|
| CN (1) | CN219145270U (en) |
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- 2022-12-14 CN CN202223338238.4U patent/CN219145270U/en active Active
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