CN212019705U - Interface circuit and welding power supply - Google Patents
Interface circuit and welding power supply Download PDFInfo
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- CN212019705U CN212019705U CN202020020467.3U CN202020020467U CN212019705U CN 212019705 U CN212019705 U CN 212019705U CN 202020020467 U CN202020020467 U CN 202020020467U CN 212019705 U CN212019705 U CN 212019705U
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Abstract
The present disclosure relates to an interface circuit and a welding power supply, comprising: a plurality of first input ports for receiving a first control signal; a plurality of second input ports for receiving power signals; a control sub-circuit connected to the first input port for outputting a second control signal in response to the first control signal; the selection sub-circuit is respectively connected with the plurality of second input ports and the control sub-circuit and is used for responding to the second control signal to transmit the power supply signal received by one or more first input ports in the plurality of first input ports to the control sub-circuit, and the control sub-circuit processes the power supply signal; the output sub-circuit is connected with the control sub-circuit and used for outputting the processed power supply signal. The interface circuit can realize the functions of receiving, transmitting and processing different power signals by using the same circuit.
Description
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to an interface circuit and a welding power supply.
Background
At present, in the field of electronic technology, multiple paths of identical circuits and multiple paths of a/D interface circuits are generally adopted to receive and transmit multiple paths of different signals, and the adoption of the method can cause repeated arrangement of the identical circuits, thereby occupying a large amount of wiring space, causing resource waste and further increasing the cost.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
An object of the present disclosure is to provide an interface circuit and a welding power supply, which can realize the function of receiving, transmitting and processing different power signals by using the same circuit.
A first aspect of the present disclosure provides an interface circuit, comprising:
a plurality of first input ports for receiving a first control signal;
a plurality of second input ports for receiving power signals;
a control sub-circuit connected to a plurality of said first input ports for outputting a second control signal in response to said first control signal;
the selection sub-circuit is respectively connected with the plurality of second input ports and the control sub-circuit and is used for responding to the second control signal and transmitting a power supply signal received by one or more second input ports in the plurality of second input ports to the control sub-circuit, and the control sub-circuit processes the power supply signal;
and the output sub-circuit is connected with the control sub-circuit and is used for outputting the processed power supply signal.
In an exemplary embodiment of the present disclosure, the plurality of second input ports includes:
a welding current input port connected to the selection sub-circuit for receiving a welding current signal;
the arc-extinguishing current input port is connected with the selection sub-circuit and used for receiving arc-extinguishing current signals;
the pulse peak value input port is connected with the selection sub-circuit and used for receiving a pulse peak value signal;
the pulse duty ratio input port is connected with the selection sub-circuit and used for receiving a pulse duty ratio signal;
and the pulse frequency input port is connected with the selection sub-circuit and used for receiving a pulse frequency signal.
In an exemplary embodiment of the present disclosure, the selection sub-circuit includes: a first selection switch, a second selection switch, a third selection switch, a fourth selection switch and a fifth selection switch,
the first input end of the first selection switch is connected with the welding current input port, the second input end of the first selection switch is connected with the arc-extinguishing current input port, the control end of the first selection switch is connected with the control sub-circuit, and the first selection switch is used for responding to the second control signal and conducting the welding current input port and/or the arc-extinguishing current input port;
a first input end of a second selection switch is connected with the pulse peak value input port, a second input end of the second selection switch is connected with the pulse duty ratio input port, a control end of the second selection switch is connected with the control sub-circuit, and the second selection switch is used for responding to the second control signal to conduct the pulse peak value input port and/or the pulse duty ratio input port;
the input end of a third selection switch is connected with the pulse frequency input port, the control end of the third selection switch is connected with the control sub-circuit, and the third selection switch is used for responding to the second control signal and conducting the pulse frequency input port;
a first input end of a fourth selection switch is connected with the output end of the first selection switch, a second input end of the fourth selection switch is connected with the output end of the second selection switch, a control end of the fourth selection switch is connected with the control sub-circuit, and the fourth selection switch is used for responding to the second control signal to turn on the first selection switch and/or the second selection switch;
the first input end of the fifth selection switch is connected with the output end of the fourth selection switch, the second input end of the fifth selection switch is connected with the output end of the third selection switch, the control end of the fifth selection switch is connected with the control sub-circuit, the output end of the fifth selection switch is connected with the control sub-circuit, and the fifth selection switch is used for responding to the second control signal to conduct the third selection switch and/or the fourth selection switch.
In an exemplary embodiment of the present disclosure, the selection sub-circuit further includes:
and the input end of the switch controller is connected with the control sub-circuit, the first output end of the switch controller is connected with the input end of the first selection switch, the second output end of the switch controller is connected with the input end of the second selection switch, the third output end of the switch controller is connected with the input end of the third selection switch, the fourth output end of the switch controller is connected with the input end of the fourth selection switch, and the fifth output end of the switch controller is connected with the input end of the fifth selection switch, and the switch controller is used for responding to the second control signal to control the on or off of the first selection switch, the second selection switch, the third selection switch, the fourth selection switch and the fifth selection switch.
In an exemplary embodiment of the present disclosure, the interface circuit further includes:
and the first amplifying sub-circuit is connected with the selection sub-circuit and the control sub-circuit and is used for amplifying the power supply signal output by the selection sub-circuit and transmitting the power supply signal to the control sub-circuit.
In an exemplary embodiment of the present disclosure, the interface circuit further includes:
and the first signal isolation sub-circuit is connected with the selection sub-circuit and the control sub-circuit and is used for transmitting the power supply signal output by the selection sub-circuit to the control sub-circuit in a single direction.
In an exemplary embodiment of the present disclosure, the interface circuit further includes:
and the second signal isolation sub-circuit is connected with the plurality of first input ports and the control sub-circuit and is used for outputting the first control signal to the control sub-circuit in a single direction.
In an exemplary embodiment of the present disclosure, the interface circuit further includes:
and the second amplification sub-circuit is connected with the selection sub-circuit and the first signal isolation sub-circuit and is used for increasing the level of the power supply signal output by the selection sub-circuit.
In an exemplary embodiment of the present disclosure, the interface circuit further includes:
a subtraction sub-circuit connected with the first signal isolation sub-circuit and the control sub-circuit for reducing a level of a power supply signal passing through the first signal isolation sub-circuit.
A second aspect of the present disclosure provides a welding power supply comprising any of the interface circuits described above.
The technical scheme provided by the disclosure can achieve the following beneficial effects:
the interface circuit provided by the present disclosure receives different first control signals through a plurality of first input ports, and responds to the first control signals received by the first input ports and outputs second control signals through the control sub-circuit. The selection sub-circuit responds to the second control signal so as to transmit different power supply signals received by one or more second input ports of the plurality of second input ports to the control sub-circuit, and the power supply signals output from the selection sub-circuit are processed by the control sub-circuit and then output by the output sub-circuit. The interface circuit can realize the function of receiving, transmitting and processing different power signals by using the same circuit, and can avoid the repeated arrangement of the same circuit compared with a plurality of paths of the same circuit and a plurality of paths of A/D (analog/digital) port circuits, thereby saving a large amount of wiring space, easily realizing the miniaturization of the circuit, and reducing the waste of resources so as to reduce the manufacturing cost.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
FIG. 1 shows a schematic diagram of an interface circuit according to an embodiment of the present disclosure;
FIG. 2 shows a schematic diagram of an interface circuit according to another embodiment of the present disclosure;
FIG. 3 shows a schematic diagram of an interface circuit board according to an embodiment of the present disclosure;
fig. 4 illustrates a schematic diagram of a welding power supply in accordance with an embodiment of the present disclosure.
Description of reference numerals:
1. a first input port; 2. a second input port; 3. a control sub-circuit; 4. a selection sub-circuit; 5. an output sub-circuit; 6. a first amplification sub-circuit; 7. a first signal isolation sub-circuit; 8. A second amplification sub-circuit; 9. a subtraction sub-circuit; 10. a second signal isolation subcircuit; 11. an interface circuit board; 21. welding a current input port; 22. an arc-extinguishing current input port; 23. a pulse peak input port; 24. a pulse duty cycle input port; 25. a pulse frequency input port; 41. A first selection switch; 42. a second selection switch; 43. a third selection switch; 44. a fourth selection switch; 45. a fifth selection switch; 46. a switch controller.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
The terms "a," "an," "the," "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first" and "second", etc. are used merely as labels, and are not limiting on the number of their objects.
The present disclosure provides first of all an interface circuit, as shown in fig. 1, comprising a plurality of first input ports 1, a plurality of second input ports 2, a control sub-circuit 3, a selection sub-circuit 4 and an output sub-circuit 5. The interface circuit can realize the functions of receiving, transmitting and processing different power signals by using the same circuit.
In detail, the first input ports 1 may be configured to receive a first control signal, and for example, the interface circuit may include two first input ports 1, which are respectively configured to receive control signals from a remote control box (an external device for controlling output of the welding power supply) and a dedicated machine (an external device for controlling output of the welding power supply).
The above-mentioned control sub-circuit 3 may be connected to a plurality of first input ports 1 for outputting a second control signal in response to a first control signal. Specifically, the control sub-circuit 3 may be a central processing unit, but is not limited thereto, and may also be an element capable of performing data logic control, such as a single chip microcomputer.
When the first control signal is sent by the remote control box, the central processing unit responds to the first control signal sent by the remote control box and sends a second control signal corresponding to the remote control box according to corresponding logic control in the central processing unit; when the first control signal is sent by the special machine, the central processing unit responds to the first control signal sent by the special machine and sends a second control signal corresponding to the special machine according to the corresponding logic control of the central processing unit.
As shown in fig. 2, the second input ports 2 can be used for receiving a power signal, for example, the power signal can include a plurality of power sub-signals, such as a welding current signal, an arc-extinguishing current signal, a pulse peak signal, a pulse duty cycle signal, and a pulse frequency signal. The plurality of second input ports 2 may include: a welding current input port 21, the welding current input port 21 operable to receive a welding current signal; an arcing current input port 22, the arcing current input port 22 operable to receive an arcing current signal; a pulse peak input port 23, the pulse peak input port 23 operable to receive a pulse peak signal; a pulse duty cycle input port 24, the pulse duty cycle input port 24 operable to receive a pulse duty cycle signal; a pulse frequency input port 25, the pulse frequency input port 25 may be used to receive a pulse frequency signal.
The selection sub-circuit 4 in the interface circuit is respectively connected to the plurality of second input ports 2 and the control sub-circuit 3, and is configured to transmit the power signal received by one or more first input ports 1 in the plurality of first input ports 1 to the control sub-circuit 3 in response to the second control signal, and process the power signal through the control sub-circuit 3. It will be appreciated that the selection sub-circuit 4 may be connected to the welding current input port 21, the arc discharge current input port 22, the pulse peak input port 23, the pulse duty cycle input port 24, and the pulse frequency input port 25, respectively, for transmitting and processing the corresponding power supply sub-signals received at one or more of the above input ports to the control sub-circuit 3.
For example, when the second control signal sent by the control sub-circuit 3 is the second control signal corresponding to the remote control box, the selection sub-circuit 4 responds to the second control signal to transmit the welding current signal and the arc-extinguishing current signal received by the welding current input port 21 and the arc-extinguishing current input port 22 to the control sub-circuit 3 and process the signals.
When the second control signal sent by the control sub-circuit 3 is a second control signal corresponding to a special plane, the selection sub-circuit 4 responds to the second control signal, and transmits the arc-extinguishing current signal, the pulse peak value signal, the pulse duty ratio signal and the pulse frequency signal received by the arc-extinguishing current input port 22, the pulse peak value input port 23, the pulse duty ratio input port 24 and the pulse frequency input port 25 to the control sub-circuit 3 for processing.
Further, the selection sub-circuit 4 may include a first selection switch 41, a second selection switch 42, a third selection switch 43, a fourth selection switch 44, and a fifth selection switch 45, which may be electronic switches, but is not limited thereto, and may also be transistors, single-pole double-throw switches, and the like, and all fall within the protection scope of the present disclosure.
Wherein a first input terminal of the first selection switch 41 may be connected to the welding current input port 21, a second input terminal may be connected to the arcing current input port 22, and a control terminal may be connected to the control sub-circuit 3, the first selection switch 41 being operable to switch on the welding current input port 21 and/or the arcing current input port 22 in response to a second control signal.
A first input terminal of the second selection switch 42 may be connected to the pulse peak input port 23, a second input terminal may be connected to the pulse duty cycle input port 24, and a control terminal may be connected to the control sub-circuit 3, and the second selection switch 42 may be configured to turn on the pulse peak input port 23 and/or the pulse duty cycle input port 24 in response to the second control signal;
an input end of the third selection switch 43 may be connected to the pulse frequency input port 25, a control end may be connected to the control sub-circuit 3, and the third selection switch 43 may be configured to turn on the pulse frequency input port 25 in response to the second control signal;
a fourth selection switch 44 may have a first input terminal connected to the output terminal of the first selection switch 41, a second input terminal connected to the output terminal of the second selection switch 42, and a control terminal connected to the control sub-circuit 3, wherein the fourth selection switch 44 may be configured to turn on the first selection switch 41 and/or the second selection switch 42 in response to a second control signal;
a fifth selection switch 45 may have a first input coupled to the output of the fourth selection switch 44, a second input coupled to the output of the third selection switch 43, a control coupled to the control sub-circuit 3, and an output coupled to the control sub-circuit 3, the fifth selection switch 45 being operable to turn on the third selection switch 43 and/or the fourth selection switch 44 in response to a second control signal.
When the second control signal is the second control signal corresponding to the remote control box, the fifth selection switch 45 may turn on the third selection switch 43, the third selection switch 43 may turn on the first selection switch 41, and the first selection switch 41 may turn on the welding current input port 21 and the arcing current input port 22.
The interface circuit can be used for a welding device, before the welding device performs welding work, the first selection switch 41 receives a second control signal relative to the remote control box, the welding current input port 21 and the arc-extinguishing current input port 22 can be conducted periodically and circularly, so that the welding current signal and the arc-extinguishing current signal are periodically and circularly received by the first selection switch and are transmitted to the control sub-circuit 3, and the control sub-circuit 3 respectively calculates the average value of the periodically received welding current signal and the periodically received arc-extinguishing current signal. The mode of periodic cycle conduction is used, so that the stability of transmitted data is higher. In the process of welding operation of the welding device, the first selection switch 41 may only turn on the welding current input port 21 to receive the welding current signal in real time, and in this way, the delay of signal transmission can be reduced, thereby increasing the response speed.
When the second control signal is the second control signal corresponding to the special plane, the fifth selection switch 45 may periodically and cyclically turn on the third selection switch 43 and the fourth selection switch 44, the third selection switch 44 may turn on the pulse frequency input port 25 to receive the pulse frequency signal, the fourth selection switch 43 may periodically and cyclically turn on the first selection switch 41 and the second selection switch 42, the first selection switch 41 may turn on the welding current input port 21, and the second selection switch 42 may periodically and cyclically turn on the pulse peak value input port 23 and the pulse duty ratio input port 24. The input ports are periodically and circularly conducted through the switches, and the average value of the received power supply sub-signals is respectively obtained, so that the periodic and circular receiving of the power supply sub-signals corresponding to the special machine can be realized, and the stability of the signals is improved.
According to the requirements of different welding works, before the welding device performs the welding work, the power supply sub-signals corresponding to the special machine can be received, and are not received any more in the welding process. However, the power supply sub-signals corresponding to the special machine may be received before the welding device performs the welding operation, and may be received in real time during the welding process. When only one of the power subsignals is required for a welding operation, it may also be received in real time.
Preferably, the selection sub-circuit 4 may further include a switch controller 46, and the switch controller 46 may be an element composed of a transistor and a photo-coupler, but is not limited thereto. The switch controller 46 has an input connected to the control sub-circuit 3, a first output connected to an input of the first selection switch 41, a second output connected to an input of the second selection switch 42, a third output connected to an input of the third selection switch 43, a fourth output connected to an input of the fourth selection switch 44, and a fifth output connected to an input of the fifth selection switch 45, and the switch controller 46 can be configured to respond to a second control signal to control on or off of the first selection switch 41, the second selection switch 42, the third selection switch 43, the fourth selection switch 44, and the fifth selection switch 45.
Furthermore, the interface circuit may further include a first amplifying sub-circuit 6, and the first amplifying sub-circuit 6 may be an operational amplifier, but is not limited thereto, and may also be a proportional amplifier, and the like, which are within the protection scope of the present disclosure. The first amplification sub-circuit 6 may be connected to the selection sub-circuit 4 and the control sub-circuit 3 for amplifying the power supply signal output from the selection sub-circuit 4 and transmitting to the control sub-circuit 3. The first amplification sub-circuit 6 can amplify the power supply signal, thereby ensuring good transmission effect of the power supply signal.
The interface circuit may further comprise a first signal isolation sub-circuit 7, the first signal isolation sub-circuit 7 being connected to the selection sub-circuit 4 and the control sub-circuit 3 for unidirectionally transmitting the power supply signal output by the selection sub-circuit 4 to the control sub-circuit 3. The first signal isolation sub-circuit 7 may be an optical coupler, but is not limited thereto, and may also be other elements having a unidirectional transmission function, which are within the protection scope of the present disclosure.
In addition, the interface circuit may further include a second signal isolation sub-circuit 10, where the second signal isolation sub-circuit 10 is connected to the plurality of first input ports 1 and the control sub-circuit 3, and is configured to output the first control signal to the control sub-circuit 3 in a single direction. The second signal isolation sub-circuit 10 may also be an optical coupler, but is not limited thereto, and may also be other elements having a unidirectional transmission function, which is within the protection scope of the present disclosure.
In addition to this, the interface circuit may further comprise a second amplification sub-circuit 8 and a subtraction sub-circuit 9, wherein the second amplification sub-circuit 8 is connected to the selection sub-circuit 4 and the first signal isolation sub-circuit 7 for increasing the level of the power supply signal output by the selection sub-circuit 4, thereby enabling the first signal isolation sub-circuit 7 to be better conducted. A subtraction sub-circuit 9 may be connected to the first signal isolation sub-circuit 7 and the control sub-circuit 3 for reducing the level of the power supply signal passing through the first signal isolation sub-circuit 7, preventing damage to the control sub-circuit 3 due to excessive signal levels.
Preferably, as shown in fig. 3, the interface circuit may be disposed on a circuit board to form an interface circuit board 11, wherein the first signal isolation sub-circuit 7 may be disposed between the control sub-circuit 3 and the selection sub-circuit 4, and the second signal isolation sub-circuit 10 may be disposed between the control sub-circuit 3 and the selection sub-circuit 4 and may be disposed adjacent to the first signal isolation sub-circuit 7.
Another aspect of the present disclosure provides a welding power supply, as shown in fig. 4, which may include the above-mentioned interface circuit, i.e., the above-mentioned interface circuit board 11 may be disposed in the welding power supply, so that the welding power supply may realize the functions of a plurality of different signal inputs through only one interface circuit.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. An interface circuit, comprising:
a plurality of first input ports for receiving a first control signal;
a plurality of second input ports for receiving power signals;
a control sub-circuit connected to a plurality of said first input ports for outputting a second control signal in response to said first control signal;
the selection sub-circuit is respectively connected with the plurality of second input ports and the control sub-circuit and is used for responding to the second control signal to transmit the power supply signal received by one or more first input ports in the plurality of first input ports to the control sub-circuit, and the control sub-circuit processes the power supply signal;
and the output sub-circuit is connected with the control sub-circuit and is used for outputting the processed power supply signal.
2. The interface circuit of claim 1, wherein the plurality of second input ports comprises:
a welding current input port connected to the selection sub-circuit for receiving a welding current signal;
the arc-extinguishing current input port is connected with the selection sub-circuit and used for receiving arc-extinguishing current signals;
the pulse peak value input port is connected with the selection sub-circuit and used for receiving a pulse peak value signal;
the pulse duty ratio input port is connected with the selection sub-circuit and used for receiving a pulse duty ratio signal;
and the pulse frequency input port is connected with the selection sub-circuit and used for receiving a pulse frequency signal.
3. The interface circuit of claim 2, wherein the selection sub-circuit comprises: a first selection switch, a second selection switch, a third selection switch, a fourth selection switch and a fifth selection switch,
the first input end of the first selection switch is connected with the welding current input port, the second input end of the first selection switch is connected with the arc-extinguishing current input port, the control end of the first selection switch is connected with the control sub-circuit, and the first selection switch is used for responding to the second control signal and conducting the welding current input port and/or the arc-extinguishing current input port;
a first input end of a second selection switch is connected with the pulse peak value input port, a second input end of the second selection switch is connected with the pulse duty ratio input port, a control end of the second selection switch is connected with the control sub-circuit, and the second selection switch is used for responding to the second control signal to conduct the pulse peak value input port and/or the pulse duty ratio input port;
the input end of a third selection switch is connected with the pulse frequency input port, the control end of the third selection switch is connected with the control sub-circuit, and the third selection switch is used for responding to the second control signal and conducting the pulse frequency input port;
a first input end of a fourth selection switch is connected with the output end of the first selection switch, a second input end of the fourth selection switch is connected with the output end of the second selection switch, a control end of the fourth selection switch is connected with the control sub-circuit, and the fourth selection switch is used for responding to the second control signal to turn on the first selection switch and/or the second selection switch;
the first input end of the fifth selection switch is connected with the output end of the fourth selection switch, the second input end of the fifth selection switch is connected with the output end of the third selection switch, the control end of the fifth selection switch is connected with the control sub-circuit, the output end of the fifth selection switch is connected with the control sub-circuit, and the fifth selection switch is used for responding to the second control signal to conduct the third selection switch and/or the fourth selection switch.
4. The interface circuit of claim 3, wherein the selection sub-circuit further comprises:
and the input end of the switch controller is connected with the control sub-circuit, the first output end of the switch controller is connected with the input end of the first selection switch, the second output end of the switch controller is connected with the input end of the second selection switch, the third output end of the switch controller is connected with the input end of the third selection switch, the fourth output end of the switch controller is connected with the input end of the fourth selection switch, and the fifth output end of the switch controller is connected with the input end of the fifth selection switch, and the switch controller is used for responding to the second control signal to control the on or off of the first selection switch, the second selection switch, the third selection switch, the fourth selection switch and the fifth selection switch.
5. The interface circuit of claim 1, wherein the interface circuit further comprises:
and the first amplifying sub-circuit is connected with the selection sub-circuit and the control sub-circuit and is used for amplifying the power supply signal output by the selection sub-circuit and transmitting the power supply signal to the control sub-circuit.
6. The interface circuit of claim 1, wherein the interface circuit further comprises:
and the first signal isolation sub-circuit is connected with the selection sub-circuit and the control sub-circuit and is used for transmitting the power supply signal output by the selection sub-circuit to the control sub-circuit in a single direction.
7. The interface circuit of claim 1, wherein the interface circuit further comprises:
and the second signal isolation sub-circuit is connected with the plurality of first input ports and the control sub-circuit and is used for outputting the first control signal to the control sub-circuit in a single direction.
8. The interface circuit of claim 6, further comprising:
and the second amplification sub-circuit is connected with the selection sub-circuit and the first signal isolation sub-circuit and is used for increasing the level of the power supply signal output by the selection sub-circuit.
9. The interface circuit of claim 8, wherein the interface circuit further comprises:
a subtraction sub-circuit connected with the first signal isolation sub-circuit and the control sub-circuit for reducing a level of a power supply signal passing through the first signal isolation sub-circuit.
10. A welding power supply comprising the interface circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020020467.3U CN212019705U (en) | 2020-01-06 | 2020-01-06 | Interface circuit and welding power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020020467.3U CN212019705U (en) | 2020-01-06 | 2020-01-06 | Interface circuit and welding power supply |
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| Publication Number | Publication Date |
|---|---|
| CN212019705U true CN212019705U (en) | 2020-11-27 |
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| CN202020020467.3U Active CN212019705U (en) | 2020-01-06 | 2020-01-06 | Interface circuit and welding power supply |
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| CN (1) | CN212019705U (en) |
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