CN117650618A - Arc welding power supply system and control method thereof - Google Patents
Arc welding power supply system and control method thereof Download PDFInfo
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Abstract
The invention discloses an arc welding power supply system and a control method thereof, wherein the system comprises: the power supply system comprises a power grid power supply, a battery power supply, a power supply mode setting unit, an input power supply conversion unit, a first boosting unit, a second boosting unit, a first driving unit, a second driving unit and a power output unit; the power supply mode setting unit is used for setting a power supply mode according to the power supply state, wherein the power supply mode comprises a hybrid power supply mode, a power grid power supply mode and a battery power supply mode; the input power supply conversion unit is used for controlling the connection states of the power grid power supply and the battery power supply with the first boosting unit and the second boosting unit according to the power supply mode set by the power supply mode setting unit; the first driving unit and the second driving unit generate complementary timing driving signals or synchronous timing driving signals for driving the first boosting unit and the second boosting unit, respectively. The scheme can improve the power supply capacity of the arc welding power supply and expand the application range of the arc welding power supply.
Description
Technical Field
The invention relates to the technical field of arc welding power supplies, in particular to an arc welding power supply system and a control method thereof.
Background
The portable arc welding power supply system adopting the combination of the power grid power supply and the battery power supply is a flexible and reliable power supply mode. The power supply of the power grid can be connected with the mains supply through the socket to provide stable alternating current power supply, the battery power supply can be used as a standby power supply to store electric energy and provide direct current power supply when the power supply of the power grid is not available, and then the direct current power supply is converted into alternating current power supply through the inverter.
In the existing portable arc welding power supply, the capacity of the battery power supply can only meet the short-time welding requirement in a battery power supply mode, and in a power grid power supply mode, the power grid power supply capacity is low, so that the output capacity of the arc welding power supply is limited.
Disclosure of Invention
In order to improve the supply capacity of the portable arc welding power supply, the scheme provides an arc welding power supply system and a control method, which can adjust the power supply according to the power capacity requirement and expand the application range of the arc welding power supply.
According to an aspect of the present invention, there is provided an arc welding power supply system including: the power supply system comprises a power grid power supply, a battery power supply, a power supply mode setting unit, an input power supply conversion unit, a first boosting unit, a second boosting unit, a first driving unit, a second driving unit and a power output unit;
the power grid power supply, the battery power supply, the first boosting unit, the second boosting unit and the power supply mode setting unit are respectively connected with the input power supply conversion unit; the first driving unit is connected with the first boosting unit, and the second driving unit is connected with the second boosting unit; the first boosting unit and the second boosting unit are respectively connected to the power output unit;
the power supply mode setting unit is used for setting a power supply mode according to the power supply state, wherein the power supply mode comprises a hybrid power supply mode, a power grid power supply mode and a battery power supply mode; the input power supply conversion unit is used for determining the connection states of the power grid power supply and the battery power supply with the first boosting unit and the second boosting unit according to the power supply mode set by the power supply mode setting unit; the first driving unit and the second driving unit are used for generating complementary time sequence driving signals or synchronous time sequence driving signals for respectively driving the first boosting unit and the second boosting unit.
Through the technical scheme, the power supply mode is set according to the power supply state, the connection states of the power grid power supply and the battery power supply with the first boosting unit and the second boosting unit and the output driving signal time sequence states of the first driving unit and the second driving unit are controlled according to the set power supply mode, and the overall power supply capacity of the power supply can be improved.
Optionally, in the arc welding power supply system provided by the invention, the first boost unit and the second boost unit comprise power switch devices, energy storage elements and filtering elements, and the first drive unit and the second drive unit are used for controlling the on and off states of the power switch devices by outputting time sequence synchronous drive signals or time sequence complementary drive signals so as to realize the rise of the power supply voltage.
Optionally, in the arc welding power supply system provided by the invention, the first driving unit and the second driving unit are used for triggering the response at the same time on the rising edge or the falling edge of the clock to obtain the driving signal with synchronous time sequence, or when the first driving unit outputs a high level, the second driving unit outputs a low level to obtain the driving signal with complementary time sequence.
Optionally, in the arc welding power supply system provided by the invention, the power supply mode selecting unit is used for selecting the power supply mode under the condition that the power supply of the power supply network exists and the power supply capacity of the power supply network meets the welding capacity requirement; when the power is supplied by the power grid but the power capacity of the power grid does not meet the welding capacity requirement, a hybrid power supply mode is selected; and when the power grid is not connected with the mains supply, selecting a battery power supply mode.
Optionally, in the arc welding power supply system provided by the invention, in a hybrid power supply mode, the input power supply conversion unit is used for controlling the power grid to be connected with the first boost unit, and the battery power is connected with the second boost unit; the first driving unit and the second driving unit output time sequence complementary driving signals so as to control the output power of the power grid power supply and the battery power supply.
Optionally, in the arc welding power supply system provided by the invention, in a power grid power supply mode, the input power supply conversion unit is used for controlling the power grid power supply to be connected with the first boost unit and the second boost unit simultaneously, and the first drive unit and the second drive unit output synchronous time sequence drive signals.
Optionally, in the arc welding power supply system provided by the invention, in the battery power supply mode, the input power supply conversion unit is used for controlling the battery power supply to be connected with the first boost unit and the second boost unit simultaneously, and the first drive unit and the second drive unit output synchronous time sequence drive signals.
According to another aspect of the present invention, there is provided a control method of an arc welding power supply system, including: detecting power supply states of a power grid power supply and a battery power supply, and selecting a power supply mode according to the power supply states, wherein the power supply mode comprises a hybrid power supply mode, a power grid power supply mode and a battery power supply mode;
in a hybrid power supply mode, connecting a power grid power supply to the first boosting unit, connecting a battery power supply to the second boosting unit, and controlling the first driving unit and the second driving unit to output complementary time sequence driving signals;
in a power grid power supply mode, connecting a power grid power supply to the first boosting unit and the second boosting unit, and controlling the first driving unit and the second driving unit to output synchronous time sequence driving signals;
in the battery power supply mode, a battery power supply is connected to the first boosting unit and the second boosting unit, and the first driving unit and the second driving unit are controlled to output synchronous time sequence driving signals.
Optionally, in the arc welding power supply control method provided by the invention, under the condition that the power supply of the power grid is available and the capacity of the power supply of the power grid meets the welding capacity requirement, a power supply mode of the power grid is selected; when the power is supplied by the power grid but the power capacity of the power grid does not meet the welding capacity requirement, a hybrid power supply mode is selected; and when the power grid is not connected with the mains supply, selecting a battery power supply mode.
Optionally, in the arc welding power supply control method provided by the invention, in the hybrid power supply mode, the power supply distribution ratio of the power grid power supply and the battery power supply is adjusted by adjusting the time interval and the duty ratio between the output driving signals of the first driving unit and the output driving signal of the second driving unit.
According to the technical scheme, the power grid power supply and the battery power supply are combined, so that the power grid power supply can be directly used for supplying power under the condition that the power grid power supply has power supply and the capacity of the power grid power supply meets the welding capacity requirement; when the power is supplied by the power grid but the capacity of the power grid does not meet the welding capacity requirement, the power grid and the battery power are used for supplying power simultaneously; in the absence of mains power, battery power is used alone. The scheme can control the power supply mode of the power supply according to different power supply states, meets different capacity supply requirements, and expands the application range of the arc welding power supply.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 illustrates a schematic diagram of an arc welding power system in accordance with one embodiment of the present invention;
FIG. 2 illustrates a schematic diagram of complementary timing drive signals output by a first drive unit and a second drive unit according to one embodiment of the invention;
FIG. 3 illustrates a schematic diagram of synchronized timing drive signals output by a first drive unit and a second drive unit according to one embodiment of the present invention;
fig. 4 shows a flow chart of a control method of an arc welding power supply system according to an embodiment of the present invention.
Detailed Description
The portable arc welding power supply system provided by the scheme can directly use the power supply to supply power under the conditions that the power supply of the power grid exists and the capacity of the power supply of the power grid meets the welding capacity requirement by adopting a mode of combining the power supply of the power grid and the battery power supply; when the power is supplied by the power grid but the capacity of the power grid does not meet the welding capacity requirement, the power grid and the battery power are used for supplying power simultaneously; in the absence of mains power, battery power is used alone. The scheme can control the power supply mode of the power supply according to different power supply states, meets different capacity supply requirements, and expands the application range of the arc welding power supply.
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be 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 scope of the disclosure to those skilled in the art.
Fig. 1 illustrates a schematic diagram of an arc welding power supply system according to an embodiment of the present invention. As shown in fig. 1, the arc welding power supply system includes a grid power supply, a battery power supply, a power supply mode setting unit, an input power conversion unit, a first boosting unit, a second boosting unit, a first driving unit, a second driving unit and a power output unit,
the power grid power supply, the battery power supply, the first boosting unit, the second boosting unit and the power supply mode setting unit are respectively connected with the input power supply conversion unit. The first driving unit is connected with the first boosting unit, and the second driving unit is connected with the second boosting unit. The first boosting unit and the second boosting unit are respectively connected to the power output unit.
The first and second boost units typically include power switching devices (MOSFETs, IGBTs, etc.), energy storage elements (inductors, transformers, etc.), and filtering elements (capacitors). The first driving unit and the second driving unit are used for controlling the on and off states of the power switch device by outputting a time sequence synchronous driving signal or a time sequence complementary driving signal so as to realize the rising of the power supply voltage. Accurate control of the output voltage can be achieved by varying the duty cycle and duty cycle of the switching device.
The first driving unit and the second driving unit are used for triggering a response at the same time of the rising edge or the falling edge of the clock so as to obtain a driving signal with synchronous time sequence. That is, in a specific period, the first driving unit and the second driving unit operate according to a uniform timing, and timing synchronization of the driving units can be controlled by means of timing signal synchronization, signal trigger synchronization, master-slave mode synchronization, and the like.
Alternatively, when the first driving unit outputs a high level, the second driving unit outputs a low level to obtain a driving signal with complementary timing. That is, the second driving unit is in the non-operating state for a certain period of time in which the first driving unit generates a signal, and is switched to the operating state after the period of time is ended. The timing complementation of the driving units can be realized by a microcontroller, an interlocking circuit, software programming and the like.
Fig. 2 shows a schematic diagram of complementary timing drive signals output by a first drive unit and a second drive unit according to one embodiment of the invention. As shown in fig. 2, the complementary timing driving signal includes two consecutive periodic signals whose timings are in complementary relation. The power supply distribution ratio of the power grid power supply and the battery power supply can be adjusted by adjusting the time interval and the duty ratio between the two driving signals, so that the output power of the power supply is accurately controlled.
Fig. 3 shows a schematic diagram of synchronous timing drive signals output by a first drive unit and a second drive unit according to one embodiment of the present invention. As shown in fig. 3, two driving signals included in the synchronous timing driving signals are triggered at the same clock edge, and are at high level or at low level.
The power supply mode setting unit is used for setting a power supply mode according to the power supply state, wherein the power supply mode comprises a hybrid power supply mode, a power grid power supply mode and a battery power supply mode; the input power supply conversion unit is used for determining the connection states of the power grid power supply and the battery power supply with the first boosting unit and the second boosting unit according to the power supply mode set by the power supply mode setting unit; the first driving unit and the second driving unit are respectively used for generating complementary time sequence driving signals or synchronous time sequence driving signals for driving the first boosting unit and the second boosting unit.
Specifically, the power supply mode selection unit may select the power supply mode when there is power supplied by the power supply network and the power supply capacity of the power supply network meets the welding capacity requirement; when the power is supplied by the power grid but the power capacity of the power grid does not meet the welding capacity requirement, a hybrid power supply mode is selected; and when the power grid is not connected with the mains supply, selecting a battery power supply mode.
In the hybrid power supply mode, the input power supply conversion unit is used for controlling the power supply of the power grid to be connected with the first boost unit, and the battery power supply is connected with the second boost unit; the first driving unit and the second driving unit output time sequence complementary driving signals so as to control the output power of the power grid power supply and the battery power supply.
In the power grid power supply mode, the input power supply conversion unit is used for controlling the power grid power supply to be connected with the first boosting unit and the second boosting unit simultaneously, and the first driving unit and the second driving unit output synchronous time sequence driving signals.
In the battery power supply mode, the input power supply conversion unit is used for controlling the battery power supply to be connected with the first boosting unit and the second boosting unit simultaneously, and the first driving unit and the second driving unit output synchronous time sequence driving signals.
Fig. 4 shows a flow chart of a control method of an arc welding power supply system according to an embodiment of the present invention. As shown in fig. 4, first, the power supply states of the grid power supply and the battery power supply are detected, and the power supply mode is selected according to the power supply states, and the power supply mode includes a hybrid power supply mode, a grid power supply mode, and a battery power supply mode. The power state comprises power capacity, whether a power grid power supply is connected with mains supply or not, and the like.
Specifically, under the condition that a power grid power supply supplies power and the power grid power supply capacity meets the welding capacity requirement, selecting a power grid power supply mode; when the power is supplied by the power grid but the power capacity of the power grid does not meet the welding capacity requirement, a hybrid power supply mode is selected; and when the power grid is not connected with the mains supply, selecting a battery power supply mode.
In the hybrid power supply mode, a power grid power supply is connected to the first boosting unit, a battery power supply is connected to the second boosting unit, and the first driving unit and the second driving unit are controlled to output complementary time sequence driving signals.
The power supply distribution ratio of the power grid power supply and the battery power supply can be adjusted by adjusting the time interval and the duty ratio between the output driving signals of the first driving unit and the output driving signal of the second driving unit.
In a power grid power supply mode, connecting a power grid power supply to the first boosting unit and the second boosting unit, and controlling the first driving unit and the second driving unit to output synchronous time sequence driving signals; in the battery power supply mode, a battery power supply is connected to the first boosting unit and the second boosting unit, and the first driving unit and the second driving unit are controlled to output synchronous time sequence driving signals.
In the non-hybrid power supply mode, the power supply capacity of the single power supply can be improved by boosting the power grid power supply or the battery power supply, and the requirements of various welding application scenes can be met.
According to the arc welding power supply system and the control method thereof, corresponding power supply modes can be selected according to different power supply states, in the mixed power supply mode, a power grid power supply and a battery power supply are respectively connected to respective booster units, the two booster units work in complementary modes, and the output power of the power supply can be flexibly adjusted according to welding capacity requirements; in the non-hybrid power supply mode, a power grid power supply mode is selected preferentially, and a battery power supply mode is selected under the condition that a power grid power supply is not connected with mains supply, and the power grid power supply or the battery power supply is connected to two booster units simultaneously, and the two booster units work in a synchronous mode so as to ensure that the output power of the power supply meets the capacity requirement of the welding power supply.
Therefore, the scheme can expand the power supply capacity of the arc welding power supply and expand the application range of the arc welding power supply.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules or units or components of the devices in the examples disclosed herein may be arranged in a device as described in this embodiment, or alternatively may be located in one or more devices different from the devices in this example. The modules in the foregoing examples may be combined into one module or may be further divided into a plurality of sub-modules.
Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.
Furthermore, some of the embodiments are described herein as methods or combinations of method elements that may be implemented by a processor of a computer system or by other means of performing the functions. Thus, a processor with the necessary instructions for implementing the described method or method element forms a means for implementing the method or method element. Furthermore, the elements of the apparatus embodiments described herein are examples of the following apparatus: the apparatus is for carrying out the functions performed by the elements for carrying out the objects of the invention.
As used herein, unless otherwise specified the use of the ordinal terms "first," "second," "third," etc., to describe a general object merely denote different instances of like objects, and are not intended to imply that the objects so described must have a given order, either temporally, spatially, in ranking, or in any other manner.
While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of the above description, will appreciate that other embodiments are contemplated within the scope of the invention as described herein. Furthermore, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter.
Accordingly, many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the appended claims. The disclosure of the present invention is intended to be illustrative, but not limiting, of the scope of the invention, which is defined by the appended claims.
Claims (10)
1. An arc welding power supply system, comprising: the power supply system comprises a power grid power supply, a battery power supply, a power supply mode setting unit, an input power supply conversion unit, a first boosting unit, a second boosting unit, a first driving unit, a second driving unit and a power output unit; the power grid power supply, the battery power supply, the first boosting unit, the second boosting unit and the power supply mode setting unit are respectively connected with the input power supply conversion unit; the first driving unit is connected with the first boosting unit, and the second driving unit is connected with the second boosting unit; the first boosting unit and the second boosting unit are respectively connected to the power output unit;
the power supply mode setting unit is used for setting a power supply mode according to the power supply state, and the power supply mode comprises a hybrid power supply mode, a power grid power supply mode and a battery power supply mode;
the input power supply conversion unit is used for determining the connection states of the power grid power supply and the battery power supply with the first boosting unit and the second boosting unit according to the power supply mode set by the power supply mode setting unit;
the first driving unit and the second driving unit are used for generating complementary time sequence driving signals or synchronous time sequence driving signals for respectively driving the first boosting unit and the second boosting unit.
2. The arc welding power supply system according to claim 1, wherein the first and second boost units include power switching devices, energy storage elements, and filter elements therein, and the first and second drive units are configured to control on and off states of the power switching devices by outputting timing synchronous drive signals or timing complementary drive signals, thereby achieving a rise in power supply voltage.
3. The arc welding power supply system according to claim 1, wherein the first driving unit and the second driving unit are configured to trigger a response at the same time as a rising edge or a falling edge of a clock to obtain a driving signal of timing synchronization, or when the first driving unit outputs a high level, the second driving unit outputs a low level to obtain a driving signal of timing complementation.
4. The arc welding power supply system according to claim 1, wherein the power supply mode selection unit is configured to select a power supply mode in a case where there is a power supply of the power grid and a power supply capacity of the power grid meets a welding capacity requirement; when the power is supplied by the power grid but the power capacity of the power grid does not meet the welding capacity requirement, a hybrid power supply mode is selected; and when the power grid is not connected with the mains supply, selecting a battery power supply mode.
5. The arc welding power supply system according to claim 1, wherein in the hybrid power supply mode, the input power conversion unit is configured to control the grid power supply to be connected to the first voltage boosting unit, and the battery power supply to be connected to the second voltage boosting unit; the first driving unit and the second driving unit output time sequence complementary driving signals so as to control the output power of the power grid power supply and the battery power supply.
6. The arc welding power supply system according to claim 1, wherein in the grid power supply mode, the input power conversion unit is configured to control the grid power supply to connect the first voltage boosting unit and the second voltage boosting unit simultaneously, and the first driving unit and the second driving unit output synchronous timing driving signals.
7. The arc welding power supply system according to claim 1, wherein in the battery power supply mode, the input power conversion unit is configured to control the battery power supply to connect the first voltage boosting unit and the second voltage boosting unit simultaneously, and the first driving unit and the second driving unit output synchronous timing driving signals.
8. A control method of an arc welding power supply system, comprising:
detecting power supply states of a power grid power supply and a battery power supply, and selecting a power supply mode according to the power supply states, wherein the power supply mode comprises a hybrid power supply mode, a power grid power supply mode and a battery power supply mode;
in the hybrid power supply mode, connecting a power grid power supply to a first boosting unit, connecting a battery power supply to a second boosting unit, and controlling a first driving unit and a second driving unit to output complementary time sequence driving signals;
in a power grid power supply mode, connecting a power grid power supply to the first boosting unit and the second boosting unit, and controlling the first driving unit and the second driving unit to output synchronous time sequence driving signals;
in the battery power supply mode, a battery power supply is connected to the first boosting unit and the second boosting unit, and the first driving unit and the second driving unit are controlled to output synchronous time sequence driving signals.
9. The arc welding power supply control method according to claim 8, wherein the step of detecting power supply states of the grid power supply and the battery power supply and selecting the power supply mode according to the power supply states includes:
under the condition that a power grid power supply supplies power and the power grid power supply capacity meets the welding capacity requirement, selecting a power grid power supply mode;
when the power is supplied by the power grid but the power capacity of the power grid does not meet the welding capacity requirement, a hybrid power supply mode is selected;
and when the power grid is not connected with the mains supply, selecting a battery power supply mode.
10. The control method of arc welding power supply according to claim 8, characterized in that the method comprises:
in the hybrid power supply mode, the power supply distribution proportion of the power grid power supply and the battery power supply is adjusted by adjusting the time interval and the duty ratio between the output driving signals of the first driving unit and the output driving signals of the second driving unit.
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| CN202311496330.XA CN117650618A (en) | 2023-11-10 | 2023-11-10 | Arc welding power supply system and control method thereof |
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| CN202311496330.XA CN117650618A (en) | 2023-11-10 | 2023-11-10 | Arc welding power supply system and control method thereof |
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