CN218734247U - Arc voltage proportional circuit suitable for selection of arc voltage lifting device of numerical control cutting machine - Google Patents
Arc voltage proportional circuit suitable for selection of arc voltage lifting device of numerical control cutting machine Download PDFInfo
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- CN218734247U CN218734247U CN202123155107.8U CN202123155107U CN218734247U CN 218734247 U CN218734247 U CN 218734247U CN 202123155107 U CN202123155107 U CN 202123155107U CN 218734247 U CN218734247 U CN 218734247U
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Abstract
The application relates to an arc voltage proportional circuit suitable for numerical control cutting machine arc voltage is raised the ware and is selected, and it includes: the input unit is used for connecting an external circuit and outputting an original arc voltage; the first filtering unit is connected with the input unit to carry out low-pass filtering on the original arc voltage; a fixed load connected to the first filter unit to generate a supply arc voltage at both ends; the fixed output unit is connected to two ends of the fixed load to output fixed arc voltage; the voltage dividing branch circuit is connected to two ends of the fixed load and comprises a plurality of voltage dividing devices connected in series, and a voltage dividing output interface is arranged between every two adjacent voltage dividing devices to output proportional arc voltage. The application has the advantages of improving the convenience and the reliability of integral matching.
Description
Technical Field
The application relates to the field of cutting machines, in particular to an arc voltage proportional circuit suitable for selection of an arc voltage raising device of a numerical control cutting machine.
Background
When the existing domestic popular plasma cutting power supply inverter plasma cutting machine matched robot is matched with the arc voltage regulator of the CNC (computerized numerical control) lathe, because one option of the output original arc voltage of the inverter power supply is adopted, and other optional voltage reduction arc voltage proportional circuits are not available, when the matched robot is matched with the arc voltage regulator of the CNC lathe, an electric iron needs to be repaired or a separation pressure division plate needs to be added, and the arc voltage regulator plate also becomes an arc voltage regulating plate to regulate and output arc voltage. However, the problem needs to be solved on the spot by professional staff, which brings certain difficulty for integral matching and is very inconvenient. Because the original arc voltage of the inverter is too high, if the output arc voltage is not processed properly, the inverter is extremely dangerous, and when the matched robot is matched with an arc voltage regulator of a CNC (computerized numerical control) lathe, certain hidden danger also exists in the reliability.
SUMMERY OF THE UTILITY MODEL
In order to improve the convenience and the reliability of integral matching, the application provides an arc voltage proportional circuit suitable for the selection of an arc voltage lifting device of a numerical control cutting machine.
First aspect, the application provides a be applicable to numerical control cutting machine arc voltage and raise arc voltage proportional circuit that ware selected adopts following technical scheme:
an arc voltage proportional circuit suitable for selection of an arc voltage lifter of a numerical control cutting machine comprises:
the input unit is used for connecting an external circuit and outputting an original arc voltage;
the first filtering unit is connected to the input unit and used for low-pass filtering the original arc voltage;
a fixed load connected to the first filter unit to generate a supply arc voltage at both ends;
the fixed output unit is connected to two ends of the fixed load to output fixed arc voltage;
the voltage dividing branch circuit is connected to two ends of the fixed load and comprises a plurality of voltage dividing devices connected in series, and a voltage dividing output interface is arranged between every two adjacent voltage dividing devices to output proportional arc voltage.
By adopting the technical scheme, the input unit is used for being connected with an external circuit, and the external circuit generally adopts an IGBT high-frequency switch inversion technology to invert alternating current into direct current. The first filtering unit performs low-pass filtering on the direct current to filter out the fluctuating part in the direct current after inversion, so that the voltage and the current are more stable. The filtered original arc voltage forms a supply arc voltage at two ends of the fixed load so as to be output at the fixed output unit. When the arc voltage lifting device is integrally matched, the lower arc voltage can be selected to be output by selecting different voltage division output interfaces according to the configuration requirement of the arc voltage lifting device. The arc voltage proportional circuit is adopted to control the arc voltage booster, so that high-voltage interference is reduced, and the cutting system, the numerical control lathe and the robot control system are prevented from being interfered by electromagnetism and high voltage to achieve the effect of normal cutting. Meanwhile, a plurality of optional arc voltage proportional circuits are provided, the matching voltage of the arc voltage booster of the market robot and the numerical control lathe is met, and the convenience and the reliability of integral matching are improved.
Optionally, the first filtering unit includes a first capacitor C1, a second capacitor C2, a first inductor L1 and a second inductor L2, two ends of the first capacitor C1 are respectively used for connecting a positive input end and a negative input end of an external circuit, the first inductor L1 is connected to the positive input end of the external circuit, the second inductor L2 is connected to the negative input end of an external point, two ends of the second capacitor C2 are respectively connected to one end of the first inductor L1 far away from the first capacitor C1 and one end of the second inductor L2 far away from the first capacitor C1, and two ends of the second capacitor C2 are used for inputting the original arc voltage after filtering.
By adopting the technical scheme, because the external current input into the input unit is usually the input of a power frequency power supply, the external current is directly rectified and then sent to an inverter consisting of devices such as IGBT (insulated gate bipolar transistor) and the like to be changed into high-frequency alternating current, and the high-frequency alternating current is subjected to voltage reduction by a high-frequency transformer, rectification by a high-frequency rectifier and filtering and then outputs direct current suitable for cutting, certain fluctuation components exist, and the first inductor L1 and the second inductor L2 are coupled to prevent the fluctuation of the flowing current. The first capacitor C1 and the second capacitor C2 allow the alternating current component to pass, also resulting in a filtering effect. In summary, the first capacitor C1, the second capacitor C2, the first inductor L1 and the second inductor L2 form an LC filter.
Optionally, the fixed load includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a fourth capacitor C4, the seventh resistor R7 and the ninth resistor R9 are sequentially connected to the positive output end and the negative output end of the first filtering unit, the eighth resistor R8 and the fourth capacitor C4 are sequentially connected to the positive output end and the negative output end of the first filtering unit, and a node between the seventh resistor R7 and the ninth resistor R9 is connected to a node between the eighth resistor R8 and the fourth resistor R4.
Through adopting above-mentioned technical scheme, fixed load sets up the both ends at first filtering unit, and the arc is pressed and is added on fixed load so that the electric current passes through fixed load, and seventh resistance R7, eighth resistance R8, ninth resistance R9 and fourth electric capacity C4 pass through the parameter setting in order to have the characteristic of big impedance to make fixed load's both ends produce big supply arc and press. That is to say, the fixed load absorbs the virtual voltage and outputs the fixed arc voltage to the arc voltage lifter of the plasma cutting machine for the numerical control machine at two ends for matching use.
Optionally, the voltage division branch includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5, which are sequentially connected between the positive output end and the negative output end of the first filtering unit, and a node of the fifth resistor R5, which is far away from the fourth resistor R4, is a fixed voltage division negative interface; the node between the first resistor R1 and the second resistor R2 is a first voltage-dividing positive electrode interface, and/or the node between the second resistor R2 and the third resistor R3 is a second voltage-dividing positive electrode interface, and/or the node between the third resistor R3 and the fourth resistor R4 is a third voltage-dividing positive electrode interface.
Through adopting above-mentioned technical scheme, the virtual voltage is absorbed to the fixed load to at both ends output fixed arc voltage, fixed arc voltage is after the partial pressure in proper order of first resistance R1, second resistance R2, third resistance R3, in order to output first proportion arc voltage at first partial pressure positive pole interface, outputs second proportion arc voltage at second partial pressure positive pole interface, outputs third proportion arc voltage at third partial pressure positive pole interface.
Optionally, the output arc voltage between the first voltage-dividing positive electrode interface and the fixed voltage-dividing negative electrode interface is: original arc voltage = 1.
By adopting the technical scheme, 1.
Optionally, the output arc voltage between the second voltage-dividing positive electrode interface and the fixed voltage-dividing negative electrode interface is: original arc voltage = 1.
By adopting the technical scheme, 1.
Optionally, the output arc voltage between the third voltage-dividing positive electrode interface and the fixed voltage-dividing negative electrode interface is: original arc voltage = 1.
By adopting the technical scheme, 1.
Optionally, the power supply system further comprises a second filtering unit, wherein the second filtering unit is connected to the voltage dividing branch to perform secondary filtering on the power supply arc voltage entering the voltage dividing branch.
Optionally, the second filtering unit includes a third capacitor and a first diode, the third capacitor is connected in parallel to the first diode, a cathode of the first diode is connected to the first voltage-dividing positive interface, and an anode of the first diode is connected to the negative output terminal of the first filtering unit.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the four partial pressure proportional relations, a plurality of optional arc voltage proportional circuits are provided to meet the matching voltage of the arc voltage increaser of a market robot and a CNC (computer numerical control) lathe, and the convenience and the reliability of integral matching are also improved.
2. The arc voltage proportional circuit is adopted to control the arc voltage booster, so that high-voltage interference is reduced, the voltage division proportion is selective, and the cutting system, the numerical control lathe and the robot control system are prevented from being interfered by electromagnetism and high voltage to achieve the effect of normal cutting.
Drawings
Fig. 1 is a circuit for proportional arc voltage selection suitable for an arc voltage raising device of a numerical control cutting machine according to an embodiment of the present application.
Description of reference numerals:
1. an input unit; 2. a first filtering unit; 3. fixing a load; 4. a fixed output unit; 5. a voltage dividing circuit; 6. and a second filtering unit.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the inventive concepts. Some of the figures in the present disclosure show structures and devices in block diagram form as part of this specification to avoid obscuring the disclosed principles. In the interest of clarity, not all features of an actual implementation are described in this specification. Moreover, the language used in the present disclosure has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter, resort to the claims being necessary to determine such inventive subject matter. Reference in the present disclosure to "one implementation" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the implementation is included in at least one implementation, and references to "one implementation" or "an implementation" are not to be understood as necessarily all referring to the same implementation.
At present, the cutting process quality of a numerical control cutting machine and a robot cutting machine is the best cutting effect realized by comprehensively controlling cutting arc pressure, current and air flow, wherein accurate and clean arc pressure is an important factor of numerical control cutting. The cutting arc voltage is the working voltage between the cutting torch and the cutting workpiece during cutting, generally, after the current is input by a power frequency power supply, the current is directly rectified and sent to an inverter composed of devices such as Insulated Gate Bipolar Transistor (IGBT) and the like to be changed into high-frequency alternating current, and then the direct current suitable for cutting is output after the voltage is reduced by a high-frequency transformer, rectified by a high-frequency rectifier and filtered, namely the cutting arc voltage. Because inverter's original arc is pressed too high, if output arc is pressed and is handled improperly, draw it and will be extremely dangerous, simultaneously, when carrying out the arc voltage of robot and numerical control lathe CNC and transferring the high ware to supporting, the reliability also has certain hidden danger.
The embodiment of the application discloses arc voltage proportional circuit suitable for selection of numerical control cutting machine arc voltage raising device. Referring to fig. 1, the arc voltage proportional circuit includes an input unit, a first filter unit, a second filter unit, a fixed load, a fixed output unit and a voltage dividing branch, the input unit is used for connecting an external circuit and outputting an original arc voltage, the first filter unit is connected to the input unit to perform low pass filtering on the original arc voltage, the fixed load is connected to the first filter unit to generate a supply arc voltage at both ends, the fixed output unit is connected to both ends of the fixed load to output the fixed arc voltage, the voltage dividing branch is connected to both ends of the fixed load to divide and output the fixed arc voltage, and the second filter unit is used for performing secondary filtering on the supply arc voltage entering the voltage dividing branch.
The input unit may be a device such as a plug or a socket that can be detachably connected to an external circuit, or may be a device such as a post that can be soldered to an external circuit. In one embodiment, the external circuit includes a power frequency power supply, an inverter, a transformer, a rectifier, and a filter, and specifically, the power frequency power supply inputs power current, directly rectifies the power current, and then sends the power current to an inverter composed of IGBTs and other devices to convert the power current into high-frequency alternating current, and then steps down the high-frequency alternating current through a high-frequency transformer, rectifies the power current through a high-frequency rectifier, and filters the high-frequency alternating current into direct current suitable for cutting.
The first filtering unit comprises a first capacitor C1, a second capacitor C2, a first inductor L1 and a second inductor L2, two ends of the first capacitor C1 are respectively used for being connected with a positive input end and a negative input end of an external circuit, the first inductor L1 is connected with the positive input end of the external circuit, the second inductor L2 is connected with the negative input end of an external point, two ends of the second capacitor C2 are respectively connected with one end of the first inductor L1 far away from the first capacitor C1 and one end of the second inductor L2 far away from the first capacitor C1, and two ends of the second capacitor C2 are used for inputting original arc voltage after filtering. Optionally, the first inductor L1 and the second inductor L2 are coupled.
The fixed load comprises a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a fourth capacitor C4, the seventh resistor R7 and the ninth resistor R9 are sequentially connected with the positive output end and the negative output end of the first filtering unit, the eighth resistor R8 and the fourth capacitor C4 are sequentially connected with the positive output end and the negative output end of the first filtering unit, and a node between the seventh resistor R7 and the ninth resistor R9 is connected with a node between the eighth resistor R8 and the fourth resistor R4.
The voltage dividing branch circuit is connected to two ends of the fixed load and comprises a plurality of voltage dividing devices connected in series, and a voltage dividing output interface is arranged between every two adjacent voltage dividing devices to output proportional arc voltage. Specifically, in a certain embodiment, the voltage dividing branch includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5 sequentially connected between the positive output end and the negative output end of the first filtering unit, and a node of the fifth resistor R5 far away from the fourth resistor R4 is a fixed voltage dividing negative electrode interface. Optionally, a node between the first resistor R1 and the second resistor R2 is a first voltage-dividing positive electrode interface, and an output arc voltage between the first voltage-dividing positive electrode interface and the fixed voltage-dividing negative electrode interface is: original arc voltage = 1. Optionally, a node between the second resistor R2 and the third resistor R3 is a second voltage-dividing positive electrode interface, and an output arc voltage between the second voltage-dividing positive electrode interface and the fixed voltage-dividing negative electrode interface is: original arc voltage = 1. Optionally, a node between the third resistor R3 and the fourth resistor R4 is a third voltage division positive electrode interface, and an output arc voltage between the third voltage division positive electrode interface and the fixed voltage division negative electrode interface: original arc voltage = 1.
The second filtering unit is connected with the voltage division branch circuit to carry out secondary filtering on the power supply arc voltage entering the voltage division branch circuit. Specifically, the second filter unit comprises a third capacitor and a first diode, the third capacitor is connected in parallel with the first diode, the cathode of the first diode is connected to the first voltage division anode interface, and the anode of the first diode is connected to the negative output end of the first filter unit.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides an arc voltage proportional circuit suitable for numerical control cutting machine arc voltage raises ware and selects which characterized in that includes:
the input unit is used for connecting an external circuit and outputting an original arc voltage;
the first filtering unit is connected to the input unit and used for low-pass filtering the original arc voltage;
a fixed load connected to the first filter unit to generate a supply arc voltage at both ends;
the fixed output unit is connected to two ends of the fixed load to output fixed arc voltage;
the voltage dividing branch circuit is connected to two ends of the fixed load and comprises a plurality of voltage dividing devices connected in series, and a voltage dividing output interface is arranged between every two adjacent voltage dividing devices to output proportional arc voltage.
2. The arc voltage proportion circuit of claim 1, wherein the first filtering unit comprises a first capacitor C1, a second capacitor C2, a first inductor L1 and a second inductor L2, two ends of the first capacitor C1 are respectively used for connecting a positive input end and a negative input end of an external circuit, the first inductor L1 is connected to the positive input end of the external circuit, the second inductor L2 is connected to the negative input end of an external point, two ends of the second capacitor C2 are respectively connected to one end of the first inductor L1 far away from the first capacitor C1 and one end of the second inductor L2 far away from the first capacitor C1, and two ends of the second capacitor C2 are used for inputting the filtered original arc voltage.
3. The arc voltage proportion circuit of claim 1, wherein the fixed load comprises a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a fourth capacitor C4, the seventh resistor R7 and the ninth resistor R9 are sequentially connected to the positive output end and the negative output end of the first filtering unit, the eighth resistor R8 and the fourth capacitor C4 are sequentially connected to the positive output end and the negative output end of the first filtering unit, and a node between the seventh resistor R7 and the ninth resistor R9 is connected to a node between the eighth resistor R8 and the fourth resistor R4.
4. The arc voltage proportion circuit according to claim 1, wherein the voltage division branch comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a fifth resistor R5 which are sequentially connected between the positive output end and the negative output end of the first filtering unit, and a node of the fifth resistor R5, which is far away from the fourth resistor R4, is a fixed voltage division negative electrode interface; the node between the first resistor R1 and the second resistor R2 is a first voltage-dividing positive electrode interface, and/or the node between the second resistor R2 and the third resistor R3 is a second voltage-dividing positive electrode interface, and/or the node between the third resistor R3 and the fourth resistor R4 is a third voltage-dividing positive electrode interface.
5. The arc voltage ratio circuit of claim 4, wherein the output arc voltage between the first divided voltage positive interface and the fixed divided voltage negative interface is: original arc voltage = 1.
6. The arc voltage proportional circuit of claim 4, wherein the output arc voltage between the second divided voltage positive interface and the fixed divided voltage negative interface: original arc voltage = 1.
7. The arc voltage proportional circuit of claim 4, wherein the output arc voltage between the third divided voltage positive interface and the fixed divided voltage negative interface: original arc voltage = 1.
8. The arc voltage proportional circuit of claim 1, further comprising a second filter unit coupled to the voltage divider circuit for secondary filtering of the supply arc voltage into the voltage divider circuit.
9. The arc voltage proportional circuit of claim 8, wherein the second filter unit comprises a third capacitor and a first diode, the third capacitor is connected in parallel with the first diode, the cathode of the first diode is connected to the first voltage-dividing positive terminal, and the anode of the first diode is connected to the negative output terminal of the first filter unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123155107.8U CN218734247U (en) | 2021-12-15 | 2021-12-15 | Arc voltage proportional circuit suitable for selection of arc voltage lifting device of numerical control cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123155107.8U CN218734247U (en) | 2021-12-15 | 2021-12-15 | Arc voltage proportional circuit suitable for selection of arc voltage lifting device of numerical control cutting machine |
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| Publication Number | Publication Date |
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| CN218734247U true CN218734247U (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123155107.8U Active CN218734247U (en) | 2021-12-15 | 2021-12-15 | Arc voltage proportional circuit suitable for selection of arc voltage lifting device of numerical control cutting machine |
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- 2021-12-15 CN CN202123155107.8U patent/CN218734247U/en active Active
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