CN217509096U - Integrated transformer power supply system for multiphase plasma generating device - Google Patents
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Abstract
The utility model provides an integrated transformer electrical power generating system for heterogeneous plasma generating device relates to the power field of high-power heterogeneous plasma generator. The device comprises a voltage-regulating and frequency-controlling unit, an integrated transformer unit and a plasma generator which are sequentially connected, and a multiphase output power supply can be obtained by changing the wiring mode of the integrated transformer unit so as to adapt to different frequency requirements, different voltage phase requirements, different steep drop characteristic requirements and the like of different multiphase plasma generators.
Description
Technical Field
The utility model relates to a high-power heterogeneous plasma generator's power field particularly, relates to an integrated transformer electrical power generating system for heterogeneous plasma generating device.
Background
Thermal plasma is widely used in various fields as a high-efficiency energy source. Since it not only possesses the specific abilities of high temperature, high enthalpy, enhancing reaction kinetics, fast reaction to form chemical non-equilibrium material, etc., but also can adjust the oxidizing or reducing atmosphere of chemical reaction according to different requirements, thermal plasma has attracted strong attention recently.
The ac arc generated by the ac power supply is one of the thermal plasmas. It is energy efficient mainly because it eliminates the AC to DC link. However, the existing single-phase or three-phase alternating current arc has the characteristic of intermittent discharge when the polarity is switched and has the problem of small discharge volume, so that the further development of the thermal plasma is limited, and the multi-phase alternating current arc is introduced. The multi-phase alternating current arc is generated between 4 or 6 or even more than 12 electrodes, has three characteristics of high energy efficiency, large plasma volume and low gas flow rate, can be applied to the fields of graphene manufacturing, alkali-free glass bead production, organic wastewater treatment, gas heating, waste gas treatment and the like, and can also be widely applied to the industries of thermal power generation, cement building materials, chemical industry, metallurgy and mines.
The power supply of the multi-phase plasma integrated transformer is used as the most core system in the plasma generating device, and the practical and engineered conditions of high efficiency, real property, durability and easy maintenance must be ensured. The existing multi-phase plasma integrated transformer power supply system needs to be designed separately according to the special requirements of different multi-phase plasma generating devices, for example, the output multi-phase power supply is usually 3-phase, 6-phase, 12-phase and 24-phase, while the multi-phase plasma generating device needing 9-phase and 15-phase is needed to be redesigned, the flexibility of the whole system is low, and the multi-phase plasma integrated transformer power supply system cannot be widely applied to different multi-phase plasma generating devices.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an integrated transformer electrical power generating system for many equal plasma generating device, it can obtain the heterogeneous power of different needs through the mode of connection that changes integrated transformer unit, reaches the practical engineering's of high-efficient skin reality, durable, easy to maintain necessary condition.
The embodiment of the utility model is realized like this:
the embodiment of the application provides an integrated transformer power supply system for a multi-phase plasma generating device, which comprises a voltage-regulating and frequency-controlling unit, an integrated transformer unit and a plasma generator, wherein the voltage-regulating and frequency-controlling unit, the integrated transformer unit and the plasma generator are sequentially connected;
the integrated transformer unit comprises at least one group of main transformers, the primary sides of the main transformers are connected in a star shape and are connected with the voltage-regulating and frequency-controlling unit, and the secondary sides of the main transformers are connected with the plasma generator.
In some embodiments of the present invention, the voltage-regulating and frequency-controlling unit includes a voltage-regulating circuit and an auxiliary transformer, an input end of the voltage-regulating circuit is used for being connected to an external ac power supply, and an output end of the voltage-regulating circuit is connected to a primary side of the main transformer;
one end of the primary side of the auxiliary transformer is connected with a star point of the primary side of the main transformer, the other end of the primary side of the auxiliary transformer is grounded, one end of the secondary side of the auxiliary transformer is connected with the secondary side of the main transformer, and the other end of the secondary side of the auxiliary transformer is connected with a firing electrode of the plasma generator and grounded.
In some embodiments of the present invention, the two ends of the secondary side of the main transformer are equally divided into two ends respectively connected to the electrodes of the plasma generator, the midpoint tap of the secondary side of the main transformer is connected to one end of the secondary side of the auxiliary transformer, and the other end of the secondary side of the auxiliary transformer is connected to the ignition electrode of the plasma generator and grounded.
In some embodiments of the present invention, the output frequency of the auxiliary transformer is 2-4 times the output frequency of the main transformer.
In some embodiments of the present invention, the integrated transformer unit includes a first set of main transformers and a second set of main transformers, wherein the primary side of the first set of main transformers is connected in a star shape, the primary side of the second set of main transformers is connected in a triangular shape, and the secondary sides of the first set of main transformers and the second set of main transformers are connected to the plasma generator.
In some embodiments of the present invention, one end of the secondary side of the first set of main transformer and the second set of main transformer is connected to the electrode of the plasma generator, and the other end is grounded.
In some embodiments of the present invention, two ends of the secondary sides of the first and second main transformers are respectively connected to the electrodes of the plasma generator, and the midpoint taps of the secondary sides of the first and second main transformers are grounded.
In some embodiments of the present invention, the number of primary side coil turns of the second set of main transformers is the number of primary side coil turns of the first set of main transformers
And (4) doubling.
In some embodiments of the present invention, the transformer further comprises n sets of main transformers connected in an extended triangle at the primary side, where n is an integer greater than or equal to 1.
In some embodiments of the present invention, the voltage-regulating and frequency-controlling unit is a three-phase frequency converter.
Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least:
the embodiment of the utility model provides an integrated transformer electrical power generating system for many equal plasma generating device, including the voltage regulation accuse frequency unit, integrated transformer unit and the plasma generator that connect gradually, wherein the voltage regulation accuse frequency unit can comprise regulating circuit + auxiliary transformer, also can comprise three-phase frequency converter, and integrated transformer unit includes a set of main transformer that adopts the star connection once at least. When the auxiliary transformer adopts a frequency tripler, the frequency of the auxiliary transformer is 3 times that of the main transformer, the high voltage output by the secondary side of the auxiliary transformer is superposed with the voltage output by each single-phase transformer in any group of main transformers and then is used as the input of a multiphase power supply of the plasma generator, so that arc extinction caused by the zero crossing point of the power supply in the process of generating alternating current arc is prevented, and the stability is prevented from being influenced. At this time, the multiple main transformers and the auxiliary transformers form an n +1 phase integrated transformer power supply (n is a multiple of 3), and different needed multiphase power supplies can be output.
In addition, when the voltage-regulating and frequency-controlling unit directly uses a three-phase frequency converter, the output end of the voltage-regulating and frequency-controlling unit can be directly connected with the primary sides of a plurality of groups of main transformers, and the connection mode of the primary sides of each group of main transformers, such as star connection, delta connection and extended delta connection, is changed, so that the number of phases with different phase differences on the secondary side is obtained, and further, the integrated transformer power supply of the plasma generator with more than 9 phases, such as 12, 15, 18 and 24 … … (multiple phases of 3), can be obtained.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an embodiment of an integrated transformer power supply system for a multi-phase plasma generator according to the present invention;
fig. 2 is a schematic structural diagram of another embodiment of an integrated transformer power supply system for a multi-phase plasma generator according to the present invention;
fig. 3 is a schematic diagram of an electrode arrangement of a plasma generator in an embodiment of an integrated transformer power supply system for a multi-phase plasma generator according to the present invention;
fig. 4 is a schematic structural diagram of an integrated transformer unit in an embodiment of an integrated transformer power system for a multi-phase plasma generator according to the present invention;
fig. 5 is a schematic structural diagram of an integrated transformer unit in another embodiment of an integrated transformer power system for a multi-phase plasma generator according to the present invention.
Icon: 1. a voltage and frequency regulating unit; 2. an integrated transformer unit; 21. a first set of main transformers; 22. a second set of main transformers; 3. a plasma generator; 31. a plasma generator housing; 32. an electrode; 33. and a firing electrode.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.
Examples
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the individual features of the embodiments can be combined with one another without conflict.
Referring to fig. 1, an embodiment of the present invention provides an integrated transformer power system for a multi-phase plasma generating device, which includes a voltage-regulating and frequency-controlling unit 1, an integrated transformer unit 2, and a plasma generator 3, which are connected in sequence, wherein an input end of the voltage-regulating and frequency-controlling unit 1 is used for being connected to an external ac power supply, and the plasma generator 3 is used for generating a multi-phase plasma by using a multi-phase voltage output by the integrated transformer unit 2;
the integrated transformer unit 2 comprises at least one group of main transformers, the primary sides of the main transformers are connected in a star shape and are connected with the voltage-regulating and frequency-controlling unit 1, and the secondary sides of the main transformers are connected with the plasma generator 3.
Furthermore, the voltage-regulating and frequency-controlling unit 1 comprises a voltage-regulating circuit and an auxiliary transformer, wherein the input end of the voltage-regulating circuit is used for being connected with an external alternating current power supply, and the output end of the voltage-regulating circuit is connected with the primary side of the main transformer;
one end of the primary side of the auxiliary transformer is connected to the star point of the primary side of the main transformer, the other end of the primary side of the auxiliary transformer is grounded, one end of the secondary side of the auxiliary transformer is connected to the secondary side of the main transformer, and the other end of the secondary side of the auxiliary transformer is connected to the ignition electrode 33 of the plasma generator 3 and grounded.
In the technical solution provided in this embodiment, the set of main transformers is composed of 3 single-phase transformers with the same specification, for example, when the integrated transformer unit 2 includes a set of main transformers, the 3 single-phase transformers are respectively a single-phase transformer T1, a single-phase transformer T2 and a single-phase transformer T3, primary sides of the three are connected in star connection and connected to the voltage regulating circuit, and secondary sides of the three are used for outputting a multi-phase power and are connected to the electrode 32 of the plasma generator 3, so as to provide the plasma generator 3 with a multi-phase power to generate an ac arc. However, since the alternating current passes through zero twice during a period of the current during discharging, which causes discharge instability and causes "arc extinction", this can be reduced by an auxiliary transformer T4. Specifically, one end of the primary side of the auxiliary transformer T4 is connected to the star point of the primary side of the main transformer, and the other end is grounded, one end of the secondary side of the auxiliary transformer T4 is connected to the secondary sides of the single-phase transformer T1, the single-phase transformer T2, and the single-phase transformer T3, respectively, and the other end is connected to the ignition electrode 33 of the plasma generator 3 and grounded, and the other ends of the secondary sides of the single-phase transformer T1, the single-phase transformer T2, and the single-phase transformer T3 are output to the plasma generator 3 as a three-phase power. At this time, the frequency of the auxiliary transformer T4 may be 2-4 times, preferably 3 times, the frequency of the single-phase transformer T1, the single-phase transformer T2 and the single-phase transformer T3, and a phase difference exists between two transformers, so that the high voltage output from the secondary side thereof may be used to be superimposed with the voltage output from any one single-phase transformer, and then used as the input of the multi-phase power supply of the plasma generator 3, so as to achieve the purpose of stably generating the ac arc. That is to say the auxiliary transformer T4 actually acts as an arc start. In a whole, the single-phase transformer T1, the single-phase transformer T2, the single-phase transformer T3 and the auxiliary transformer T4 can be regarded as forming a "3 +1 phase" self-ignition integrated transformer power supply, which can be used for outputting a three-phase power supply. In addition, by increasing the number of main transformer sets, multi-phase output can be achieved, for example, 9-phase and 12-phase are equal.
Illustratively, the whole system can be provided with basic power by an external three-phase alternating current power supply, wherein the phase voltage of the three-phase alternating current power supply can be 220-2500V, the frequency can be 50-5000Hz, the no-load output phase voltage of the whole system can be 200-120 KV, and the load output phase voltage can be 50-20 KV. In addition, the auxiliary transformer T4 may be a small single-phase transformer with a steep drop characteristic, the capacity of which is only 10% of the total system capacity, and the primary side voltage of which is 0.3 times the main transformer rail voltage.
Referring to fig. 2 and 3, in some embodiments of the present invention, two ends of the secondary side of the main transformer are respectively connected to the electrodes 32 of the plasma generator 3, a midpoint tap of the secondary side of the main transformer is connected to one end of the secondary side of the auxiliary transformer, and the other end of the secondary side of the auxiliary transformer is connected to the ignition electrode 33 of the plasma generator 3 and grounded.
In the technical solution provided in this embodiment, one end of the secondary side of the auxiliary transformer T4 is connected to the midpoint taps of the single-phase transformer T1, the single-phase transformer T2 and the single-phase transformer T3, respectively, the other end is connected to the ignition electrode 33 of the plasma generator 3 and grounded, and the ignition electrode 33 and the plasma generator housing 31 are connected together. At this time, both ends of the single-phase transformer T1, the single-phase transformer T2, and the single-phase transformer T3 are connected to the electrode 32 of the plasma generator 3, and output to the plasma generator 3 as a 6-phase power supply to stably generate an ac arc. In a whole, the single-phase transformer T1, the single-phase transformer T2, the single-phase transformer T3 and the auxiliary transformer T4 can be regarded as forming a "6 +1 phase" self-ignition integrated transformer power supply, which can be used for outputting a 6 phase power supply. In addition, by increasing the number of main transformer sets, multi-phase output, e.g., 12-phase and 24-phase equalization, can be achieved.
Referring to fig. 4, in some embodiments of the present invention, the voltage-regulating and frequency-controlling unit 1 may directly adopt a three-phase converter, and the integrated transformer unit 2 includes a first group of main transformers 21 and a second group of main transformers 22, a primary side of the first group of main transformers 21 adopts a star connection, a primary side of the second group of main transformers 22 adopts a delta connection, and secondary sides of the first group of main transformers 21 and the second group of main transformers 22 are connected to the plasma generator 3.
Further, one end of the secondary side of the first group main transformer 21 and the second group main transformer 22 is connected to the electrode 32 of the plasma generator 3, and the other end is grounded.
In the technical solution provided in this embodiment, the voltage-regulating and frequency-controlling unit 1 may directly adopt a three-phase frequency converter, and the three-phase frequency converter provides basic power to the integrated transformer unit 2, for example, three-phase alternating current with 380V output phase voltage and 3000Hz frequency. Illustratively, the integrated transformer unit 2 includes a first set of main transformers 21 and a second set of main transformers 22, which have 6 single-phase transformers, and the secondary side has 12 total terminals, which are numbered 1-12. The primary sides of the first main transformer 21 are connected in star shape, the primary sides of the second main transformer 22 are connected in delta shape, and then the terminals 2, 4, 6, 8, 10 and 12 on the secondary sides are grounded after being short-circuited, and the terminals 1, 3, 5, 7, 9 and 11 are used as 6-phase output and connected with the electrode 32 of the plasma generator 3 to generate 6-phase alternating current arc.
Referring to fig. 5, in some embodiments of the present invention, two ends of the secondary sides of the first main transformer 21 and the second main transformer 22 are respectively connected to the electrode 32 of the plasma generator 3, and the midpoint taps of the secondary sides of the first main transformer 21 and the second main transformer 22 are grounded.
In the technical solution provided in this embodiment, first, the primary sides of the first main transformer 21 are still connected in star shape, and the primary sides of the second main transformer 22 are still connected in delta shape, and then the neutral point taps of the 6 single-phase transformers are shorted and grounded, and the terminals 1-12 are used as 12-phase output and connected to the electrode 32 of the plasma generator 3, so as to generate 12-phase ac arc.
In some embodiments of the present invention, the number of primary side coil turns of the second main transformer 22 is the number of primary side coil turns of the first main transformer 21
And (4) doubling.
In the technical solution provided in this embodiment, when the integrated transformer unit 2 includes two main transformers, in order to avoid the occurrence of circulating currents between the single-phase transformers and reduce the efficiency, the number of primary side coil turns of the second main transformer 22 whose primary side is delta-connected may be set to the number of primary side coil turns of the first main transformer 21 whose primary side is star-connected
And (4) doubling.
In some embodiments of the present invention, the transformer further comprises a main transformer having a set of sides connected by an extended triangle, wherein n is an integer greater than or equal to 1.
Referring to fig. 4 and 5, two sets of main transformers (the primary side of the first set of main transformers 21 is connected in a star shape, and the primary side of the second set of main transformers 22 is connected in a delta shape) are used to output 6-phase and 12-phase power supplies, and on the basis, a set of main transformers is added to obtain 9-phase high-voltage intermediate-frequency output power supplies, and the added primary sides of the set of main transformers can be connected in a delta shape to obtain 9-phase output power supplies with different phase differences on the secondary side. Furthermore, if n sets of main transformers with the primary sides connected in an extended delta manner are added, multiphase output power supplies, such as 12, 15, 18, 24 … … (multiple phases of 3) and the like, can be obtained on the secondary sides to meet different frequency requirements, different voltage phase requirements, different steep drop characteristic requirements and the like of different multiphase plasma generators. And different phase differences exist among the phases, wherein when the phase 1 is at the zero crossing point, other phases 5 do not pass through the zero crossing point, namely the zero crossing point is alternated every phase, so that the arc can be ensured to be continuous and stable.
To sum up, the integrated transformer power supply system for multi-phase plasma generating device that this application embodiment provided, including voltage regulation accuse frequency unit 1, integrated transformer unit 2 and the plasma generator 3 that connect gradually, wherein voltage regulation accuse frequency unit 1 can constitute by voltage regulating circuit + auxiliary transformer, also can constitute by three-phase frequency converter, and integrated transformer unit 2 includes a set of main transformer that once inclines and adopts star connection at least. When the auxiliary transformer adopts a frequency tripler, the frequency of the auxiliary transformer is 3 times that of the main transformer, the high voltage output by the secondary side of the auxiliary transformer is superposed with the voltage output by each single-phase transformer in any group of main transformers and then is input as a multi-phase power supply of the plasma generator 3, so that arc extinction caused by the zero crossing point of the power supply in the process of generating alternating current arc is prevented, and the stability is prevented from being influenced. At this time, the multiple main transformers and the auxiliary transformers form an n +1 phase integrated transformer power supply (n is a multiple of 3), and different needed multiphase power supplies can be output.
In addition, when the voltage-regulating and frequency-controlling unit 1 directly uses a three-phase frequency converter, the output end thereof can be directly connected with the primary sides of a plurality of main transformers, and the connection mode of the primary sides of each main transformer, such as star connection, delta connection, and edge-extended delta connection, is changed, so that the number of phases with different phase differences on the secondary side is obtained, and further, the integrated transformer power supply of the plasma generator 3 with more than 9 phases, such as 12, 15, 18, and 24 … … (multiple phases of 3) can be obtained.
Overall, the system is composed of a basic power supply and a plurality of single-phase transformers. Through the integrated modular multiple mode of connection of transformer, can obtain the heterogeneous power of different needs, realized high-efficient real, durable, the practical engineering's that maintains essential condition easily smoothly.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. An integrated transformer power supply system for a multiphase plasma generating device is characterized by comprising a voltage-regulating and frequency-controlling unit, an integrated transformer unit and a plasma generator which are sequentially connected, wherein the input end of the voltage-regulating and frequency-controlling unit is used for being connected with an external alternating current power supply, and the plasma generator is used for generating multiphase plasma by utilizing multiphase voltage output by the integrated transformer unit;
the integrated transformer unit comprises at least one group of main transformers, the primary sides of the main transformers are connected in a star shape and are connected with the voltage-regulating and frequency-controlling unit, and the secondary sides of the main transformers are connected with the plasma generator.
2. The integrated transformer power supply system for a multi-phase plasma generator according to claim 1, wherein the voltage-regulating and frequency-controlling unit comprises a voltage-regulating circuit and an auxiliary transformer, the input end of the voltage-regulating circuit is used for connecting with an external alternating current power supply, and the output end of the voltage-regulating circuit is connected with the primary side of the main transformer;
one end of the primary side of the auxiliary transformer is connected with a star point of the primary side of the main transformer, the other end of the primary side of the auxiliary transformer is grounded, one end of the secondary side of the auxiliary transformer is connected with the secondary side of the main transformer, and the other end of the secondary side of the auxiliary transformer is connected with a firing electrode of the plasma generator and grounded.
3. The integrated transformer power supply system for a multi-phase plasma generator according to claim 2, wherein both ends of the secondary side of the main transformer are connected to the electrodes of the plasma generator, respectively, the midpoint tap of the secondary side of the main transformer is connected to one end of the secondary side of the auxiliary transformer, and the other end of the secondary side of the auxiliary transformer is connected to the ignition electrode of the plasma generator and grounded.
4. An integrated transformer power supply system for a multiphase plasma generating device in accordance with claim 2, wherein the output frequency of said auxiliary transformer is 2-4 times the output frequency of said main transformer.
5. The integrated transformer power supply system of claim 1, wherein the integrated transformer unit comprises a first set of main transformers and a second set of main transformers, the primary sides of the first set of main transformers are connected in a star shape, the primary sides of the second set of main transformers are connected in a delta shape, and the secondary sides of the first set of main transformers and the second set of main transformers are connected to the plasma generator.
6. An integrated transformer power supply system for a multi-phase plasma generator as claimed in claim 5 wherein one side of the secondary side of said first and second sets of main transformers is connected to the electrode of said plasma generator and the other side is grounded.
7. The integrated transformer power supply system according to claim 5, wherein the two ends of the secondary sides of the first and second main transformers are respectively connected to the electrodes of the plasma generator, and the midpoint taps of the secondary sides of the first and second main transformers are grounded.
8. The integrated transformer power supply system for a multiphase plasma generator of claim 5, wherein the number of primary side coil turns of the second set of main transformers is the number of primary side coil turns of the first set of main transformers
And (4) doubling.
9. The integrated transformer power supply system for a multiphase plasma generator as recited in claim 5, further comprising n sets of main transformers having their primary sides connected in delta, wherein n is an integer greater than or equal to 1.
10. An integrated transformer power supply system for a multi-phase plasma generating device according to claim 5, wherein said voltage-regulating frequency-controlling unit is a three-phase inverter.
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| WO2023231789A1 (en) * | 2022-06-01 | 2023-12-07 | 北京东方燕中实业发展集团有限公司 | Integrated transformer power source system for multi-phase plasma generation apparatus |
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| WO2023231789A1 (en) * | 2022-06-01 | 2023-12-07 | 北京东方燕中实业发展集团有限公司 | Integrated transformer power source system for multi-phase plasma generation apparatus |
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