CN216216578U - Plasma power supply device for supplying power to plasma torch - Google Patents
Plasma power supply device for supplying power to plasma torch Download PDFInfo
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- CN216216578U CN216216578U CN202122298651.1U CN202122298651U CN216216578U CN 216216578 U CN216216578 U CN 216216578U CN 202122298651 U CN202122298651 U CN 202122298651U CN 216216578 U CN216216578 U CN 216216578U
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- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 6
- 239000010409 thin film Substances 0.000 claims description 5
- 230000009466 transformation Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
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Abstract
The utility model discloses a plasma power supply device for supplying power to a plasma torch, which comprises a three-phase power supply input end, a voltage conversion module connected with the three-phase power supply input end, a rectification module connected with the voltage conversion module, a filter capacitor module connected with the rectification module, a plurality of chopping unit modules connected with the filter capacitor module in parallel and arranged in parallel, and a filter inductor module connected with the corresponding chopping unit modules in series, wherein the power supply output end is arranged between the filter inductor module and the rectification module output end. The input voltage is changed into the desired alternating current voltage through the transformation action of the transformer and then is rectified into the direct current bus voltage required by chopper control, and the effect that the direct current voltage required to be output finally is supplied to the plasma torch to achieve the ignition of the plasma generator can be achieved through the strategy.
Description
Technical Field
The utility model relates to a power supply circuit, in particular to a plasma power supply device for supplying power to a plasma torch.
Background
The plasma power supply control system is used for supplying power to the plasma torch of the plasma ignition system of the industrial waste treatment incinerator. The industrial waste can pollute the environment without being treated, and the environment pollution can be reduced after the waste is subjected to plasma incineration treatment by constructing a high-temperature incinerator through plasma flame; the plasma ignition system needs a plasma generator, namely a plasma torch, and a power supply system to jointly form the plasma ignition system.
The high-power plasma power supply system is generally an AC/DC direct-current power supply system, namely three-phase alternating-current industrial electricity is rectified into direct-current high-voltage electricity through full-wave rectification, then the direct-current high-frequency electricity is converted into alternating current through a full-bridge circuit high-frequency transformer, then the alternating current is converted into pulsating direct current through a full-bridge high-frequency rectifier diode at the later stage, the pulsating direct current is converted into smooth direct-current voltage through an L, C filter circuit, the direct-current voltage is supplied to a plasma torch, and when the torch is ignited, the power supply continuously works at a constant current.
In the power supply structure, a complete power section circuit uses 4 IGBTs as a full bridge circuit, 1 pair of high-frequency transformers, 4 high-frequency rectifier diodes and L, C filter circuits; the selected semiconductor devices are more, the control circuit is more complex, the economy is not high, the stability and reliability level is certain, and the defect that the power distribution circuit cannot work in a 10KV input power distribution line is overcome.
At present, a 150KW plasma generation power supply system supplies power to a plasma generation system through the power supply system and is used for a dangerous waste treatment system for production. The existing problem is that the high-voltage input power distribution system of 10Kv cannot be well met, and secondly, aiming at the problem of high-power output, a power supply circuit is relatively complex and long.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a plasma power supply device for supplying power to a plasma torch, which has the characteristics that the applicable occasions of changing 10KV into 690V or changing 10KV into 380V are met, a chopper circuit of a single IGBT in a unit performs chopping control, and the chopper circuit is connected in parallel and outputs high power.
In order to solve the technical problems, the technical scheme of the utility model is as follows: a plasma power supply device for supplying power to a plasma torch is characterized in that: the plasma power supply device for supplying power to the plasma torch comprises a three-phase power supply input end, a voltage conversion module connected with the three-phase power supply input end, a rectification module connected with the voltage conversion module, a filter capacitor module connected with the rectification module, a plurality of chopping unit modules connected with the filter capacitor module in parallel and arranged in parallel, and a filter inductor module connected with the corresponding chopping unit modules in series, wherein the power supply output end is arranged between the filter inductor module and the rectification module output end.
Preferably, the three-phase power input end is connected with a three-phase input high voltage of 10Kv or a three-phase industrial 380V.
Preferably, the voltage conversion module is an inductor of an external step-down transformer.
Preferably, the step-down transformer is a three-phase main power isolation step-down transformer.
Preferably, the rectifier module is a full-bridge rectifier circuit composed of 6 three-phase rectifier diodes.
Preferably, the filter capacitor modules are formed by connecting thin film filter capacitor modules with the same number as the chopping unit modules in parallel, and the thin film filter capacitor modules are respectively connected with the corresponding chopping unit modules.
Preferably, the chopper unit module is formed by connecting a main power semiconductor device IGBT and a freewheeling diode in series, one end of the filter inductor module is connected to a connection between the main power semiconductor device IGBT and the freewheeling diode, and the other end of the filter inductor module is one end of the power output end.
Preferably, the filter inductor module is a dc filter inductor.
Preferably, a contactor is arranged between the voltage conversion module and the rectification module in series.
Preferably, a linked switch is arranged on the contactor in parallel.
The utility model has the advantages that: by adopting the structure, the input voltage is changed into the desired alternating current voltage through the transformation action of the transformer and then is rectified into the direct current bus voltage required by chopper control, and the effect that the direct current voltage which is finally required to be output is supplied to the plasma torch to achieve the ignition of the plasma generator can be achieved through the strategy.
Drawings
The utility model is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic block diagram of a plasma power supply apparatus for plasma torch powering of the present invention;
FIG. 2 is a schematic electrical circuit diagram of a plasma power supply apparatus for supplying power to a plasma torch in accordance with the present invention;
in the figure: the power supply comprises a 1-three-phase power supply input end, a 2-inductor, a 3-rectifier module, a 4-filter capacitor module, a 5-chopper unit module, a 51-main power semiconductor device IGBT, a 52-freewheeling diode, a 6-power supply output end, a 7-contactor, an 8-linkage switch, a 9-filter inductor module and a 10-external step-down transformer.
Detailed Description
The plasma power supply device for supplying power to the plasma torch comprises a three-phase power supply input end 1, a voltage conversion module connected with the three-phase power supply input end, a rectification module 3 connected with the voltage conversion module, a filter capacitor module 4 connected with the rectification module, a plurality of chopping unit modules 5 connected with the filter capacitor module in parallel and arranged between the chopping unit modules in parallel, and a filter inductor module 9 connected with the corresponding chopping unit modules in series, wherein a power supply output end 6 is arranged between the filter inductor module and the rectification module output end. The input voltage is changed into the desired alternating current voltage through the transformation action of the transformer and then is rectified into the direct current bus voltage required by chopper control, and the effect that the direct current voltage required to be output finally is supplied to the plasma torch to achieve the ignition of the plasma generator can be achieved through the strategy. The method comprises the scheme idea of voltage transformation control of the transformer and the subsequent chopping control topology scheme. The utility model can be used for manufacturing the power supply equipment of the plasma generator which needs to convert alternating current into direct current.
The three-phase power input end is connected with a three-phase input high voltage of 10Kv or a three-phase industrial 380V. The voltage conversion module is an inductor 2 of an external step-down transformer 10, the step-down transformer is a three-phase main power isolation step-down transformer, and the direct current pulsating voltage value after selected rectification can be achieved by configuring a proper transformer transformation ratio. The rectification module is a full-bridge rectification circuit consisting of 6 three-phase rectification diodes. The filter capacitor module is formed by connecting film filter capacitor modules with the same number as the chopping unit modules in parallel, and the film filter capacitor modules are respectively connected with the corresponding chopping unit modules. The chopping unit module is formed by connecting a main power semiconductor device IGBT51 and a freewheeling diode 52 in series, one end of a filter inductance module is connected at the joint of the main power semiconductor device IGBT and the freewheeling diode, the other end of the filter inductance module is one end of the output end of a power supply, the voltage value or the current value of direct-current voltage output can be set through the control of the chopping unit, and in addition, the power grade can be improved through the parallel connection of a plurality of chopping units. The filter inductor module is a direct current filter inductor. A contactor 7 is arranged between the voltage conversion module and the rectification module in series, and a linked switch 8 is arranged on the contactor in parallel.
The three-phase input high-voltage 10KV or three-phase industrial 380V alternating current is rectified and filtered by a rectifier to be converted into pulsating direct current voltage, and then the pulsating direct current voltage is converted into direct current voltage through a chopping unit at the later stage and is output. Voltage conversion is carried out by a high-voltage transformer from 10KV to 690V or from 10KV to 380V, and then the voltage is input into a power input end; three-phase alternating current after transformer transformation enters the unit after full-bridge rectification, and the chopper circuit of a single IGBT in the unit performs chopping control. The output of the chopping unit is filtered by an inductor and then output in parallel, and the redundancy design of power is increased. The plasma torch can realize three-phase 10KV input or three-phase 380V alternating current input, direct current voltage output is supplied to the plasma torch to generate plasma flame, and finally establishment of a plasma ignition system is realized.
FIG. 2 is an electrical principle general diagram after modules are connected in parallel, four groups of chopping unit modules are adopted to output in parallel, and a single power module is 60-70 kW, so that the maximum power of stable operation is ensured to be more than 250 kW. The equipment main power raw material list comprises: the three-phase main power isolation step-down transformer comprises 1 three-phase main power isolation step-down transformer, 6 three-phase rectifier diodes, 1 contactor, 4 thin film filter capacitors, a main power semiconductor device IGBT, a freewheeling diode and a direct current filter inductor. The isolation step-down transformer, the rectifier diode, the contactor and the filter inductor are a common unit, and other components are sub-module main power devices.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (10)
1. A plasma power supply apparatus for supplying power to a plasma torch, comprising: the plasma power supply device for supplying power to the plasma torch comprises a three-phase power supply input end, a voltage conversion module connected with the three-phase power supply input end, a rectification module connected with the voltage conversion module, a filter capacitor module connected with the rectification module, a plurality of chopping unit modules connected with the filter capacitor module in parallel and arranged in parallel, and a filter inductor module connected with the corresponding chopping unit modules in series, wherein the power supply output end is arranged between the filter inductor module and the rectification module output end.
2. A plasma power supply apparatus for powering a plasma torch as in claim 1 wherein: and the input end of the three-phase power supply is connected with a three-phase input high voltage of 10Kv or a three-phase industrial 380V.
3. A plasma power supply apparatus for powering a plasma torch as in claim 1 wherein: the voltage conversion module is an inductor of an external step-down transformer.
4. A plasma power supply apparatus for powering a plasma torch as in claim 3 wherein: the step-down transformer is a three-phase main power isolation step-down transformer.
5. A plasma power supply apparatus for powering a plasma torch as in claim 1 wherein: the rectification module is a full-bridge rectification circuit consisting of 6 three-phase rectification diodes.
6. A plasma power supply apparatus for powering a plasma torch as in claim 1 wherein: the filter capacitor modules are formed by connecting thin film filter capacitor modules with the same number as the chopping unit modules in parallel, and the thin film filter capacitor modules are respectively connected with the corresponding chopping unit modules.
7. A plasma power supply apparatus for powering a plasma torch as in claim 1 wherein: the chopping unit module is formed by connecting a main power semiconductor device IGBT and a freewheeling diode in series, one end of the filter inductance module is connected to the connection position of the main power semiconductor device IGBT and the freewheeling diode, and the other end of the filter inductance module is one end of the power output end.
8. A plasma power supply apparatus for powering a plasma torch as in claim 7 wherein: the filter inductor module is a direct current filter inductor.
9. A plasma power supply apparatus for powering a plasma torch as in claim 1 wherein: and a contactor is arranged between the voltage conversion module and the rectification module in series.
10. A plasma power supply apparatus for powering a plasma torch as in claim 9 wherein: and the contactor is provided with a linked switch in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122298651.1U CN216216578U (en) | 2021-09-23 | 2021-09-23 | Plasma power supply device for supplying power to plasma torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122298651.1U CN216216578U (en) | 2021-09-23 | 2021-09-23 | Plasma power supply device for supplying power to plasma torch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216216578U true CN216216578U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122298651.1U Active CN216216578U (en) | 2021-09-23 | 2021-09-23 | Plasma power supply device for supplying power to plasma torch |
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| Country | Link |
|---|---|
| CN (1) | CN216216578U (en) |
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2021
- 2021-09-23 CN CN202122298651.1U patent/CN216216578U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20240116 Address after: No. 1515 Gangfeng Road, Yangzijiang International Chemical Industry Park, Suzhou City, Jiangsu Province, 215600 Patentee after: Jiangsu Meidong Environmental Technology Co.,Ltd. Address before: 215300 No. 1515 Gangfeng Road, Jiangsu Yangzi River International Chemical Industrial Park, Suzhou, Jiangsu Patentee before: Shixing plasma technology (Jiangsu) Co.,Ltd. |