CN215545667U - General multi-functional welding machine of whole net - Google Patents
General multi-functional welding machine of whole net Download PDFInfo
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- CN215545667U CN215545667U CN202023016564.4U CN202023016564U CN215545667U CN 215545667 U CN215545667 U CN 215545667U CN 202023016564 U CN202023016564 U CN 202023016564U CN 215545667 U CN215545667 U CN 215545667U
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Abstract
The utility model relates to a general multi-functional welding machine of whole net, including power input, two sets of rectification inverter circuit, relay K2 and relay K3, relay K2 and relay K3 are used for controlling the series connection, the parallel connection of two sets of rectification inverter circuit, still include the power supply control module, relay K2 and relay K3 are series connection in order to form series circuit, and the power supply control module supplies, cuts off the power supply to series circuit according to the voltage size. Any one relay in relay K2 or relay K3 breaks down, all can make series circuit open circuit, leads to relay K2 and relay K3 all not work for two sets of rectification inverter circuit can keep the tandem state, avoids appearing singly organizing rectification inverter circuit when the power input is high voltage alternating current and is bearing the excess voltage, reduces the possibility that rectification inverter circuit appears damaging. The welding machine has at least two welding functions, such as contact argon arc welding and manual welding.
Description
Technical Field
The application relates to the field of welding circuit technology, in particular to a general multifunctional welding machine for a whole network.
Background
The power grid voltages of different countries are often different, and a common electric welding machine can only be suitable for one power grid voltage. In order to work normally under different power grid environments, a certain transformation needs to be carried out on the electric welding machine.
At present, chinese patent with publication number CN211018671U discloses a single-phase full-grid-through inverter welding machine, which includes a power input and two independent input rectification circuits, where the power input is connected with a power controller and a switching relay, the switching controller and a comparison circuit are connected between the power controller and the switching relay, the switching relay is connected with the two independent input rectification circuits respectively, the voltage of the power input is divided by resistors R2 and R3 through the power controller and then compared and judged with the reference voltage of a comparator U1 of the comparison circuit, the compared signal is transmitted to the switching controller, the switching controller transmits the judged signal to relays K2 and K3, and the series-parallel connection of the two input rectification circuits B1 and B2 is controlled by K2 and K3.
The relays K2 and K3 are connected in parallel, and when the switching controller is controlled, the relays K2 and K3 may be simultaneously activated or not activated. However, once one of the switching relays fails and cannot be controlled by the switching controller, the other switching relay is not affected and continues to be controlled by the switching controller. This may cause the single-group input rectifying circuit to be connected to the power input when the power input is high voltage, which may cause the single-group input rectifying circuit to be loaded with voltage exceeding its bearing capacity, thereby easily causing the input rectifying circuit to be damaged.
SUMMERY OF THE UTILITY MODEL
In order to reduce the probability that the rectifier inverter circuit takes place to damage, this application provides a general multi-functional welding machine of whole net.
The application provides a general multi-functional welding machine of whole network adopts following technical scheme:
the utility model provides a general multi-functional welding machine of whole net, includes power input, two sets of rectification inverter circuit, relay K2 and relay K3, relay K2 and relay K3 are used for controlling the series connection, the parallel connection of two sets of rectification inverter circuit, still includes the power supply control module, relay K2 and relay K3 are series connection in order to form series circuit, the one end of power supply control module is coupled in power input, with the voltage that receives power input, and supply, cut off the power supply to series circuit according to the voltage size.
Through adopting above-mentioned technical scheme, arbitrary relay in relay K2 or relay K3 breaks down, all can make series circuit open circuit, leads to relay K2 and relay K3 all not work for two sets of rectification inverter circuit can keep the series connection state, avoids appearing singly organizing rectification inverter circuit when the power input is high voltage alternating current and is bearing the excess voltage, reduces the possibility that rectification inverter circuit appears damaging.
Optionally, the power supply control module includes a power supply controller, a comparison circuit and a conversion controller, the power supply controller is coupled to the power supply input to receive the voltage of the power grid and convert the voltage into a direct current, the comparison circuit is coupled to the power supply controller to receive the direct current and compare the direct current with a preset value to output a corresponding comparison signal, and the conversion controller is coupled to the comparison circuit to receive the comparison signal and respond to the comparison signal to control the power supply and the power cut of the series circuit.
By adopting the technical scheme, after the alternating current input by the power supply is converted into the direct current by the power supply controller, the direct current is compared with the preset value by the comparison circuit to obtain the comparison signal, and the switching controller controls the power supply and the power off of the series circuit according to the level of the comparison signal, so that the purpose of controlling the relay K2 and the relay K3 to be started is achieved.
Optionally, the rectification inverter circuit comprises an input rectification circuit, a filter circuit, an inverter circuit, a main transformer voltage reduction circuit, an output rectification circuit and a welding output, and the input rectification circuit, the filter circuit, the inverter circuit, the main transformer voltage reduction circuit, the output rectification circuit and the welding output are electrically connected together in sequence.
By adopting the technical scheme, alternating current input by the power supply sequentially passes through rectification, filtering, inversion and rectification again so as to meet the use requirement of the argon arc welding machine.
Optionally, the inverter circuit adopts an IGBT of DC 650V.
By adopting the technical scheme, the IGBT can change the threshold value according to actual needs, so that the output of the inverter circuit more meets the requirements of a welding machine.
Optionally, the welding power supply system further comprises a driving controller, a PWM controller and a current detector, wherein the power supply control module is configured to control the PWM controller to start, the current detector is coupled to the welding output to detect the current of the welding output and output a current signal, the PWM controller is coupled to the current detector to receive the current signal and output a corresponding adjustment signal, and the driving controller is coupled to the PWM controller to receive the adjustment signal and adjust the operation of the inverter circuit.
By adopting the technical scheme, the PWM controller adopts current feedback, so that the output impedance can be reduced, and the influence on circuit power supply is reduced.
Optionally, a first delay circuit is connected between the PWM controller and the driving controller.
Through adopting above-mentioned technical scheme, the power gain of PWM controller and series circuit is all by power supply control module control, and sets up first delay circuit and can make the series circuit gain the electricity earlier than the PWM controller, just carries out the regulation of PWM controller after accomplishing the series-parallel switch of input rectifier circuit, makes circuit output more stable.
Optionally, the power supply control module further comprises a sliding rheostat RP1 and a relay K1, the sliding rheostat RP1 is connected in series between the series circuit and the power supply input, a normally open contact K1-1 of the relay K1 is connected in parallel to two ends of the sliding rheostat RP1, and the power supply control module controls the on and off of the relay K1 according to whether the power supply input provides voltage or not.
By adopting the technical scheme, when the resistance value of the slide rheostat RP1 is adjusted to be large, the series slide rheostat RP1 is equivalent to disconnecting the series circuit and the power input, when the relay K1 is started, the normally open contact K1-1 is closed and the power input is equivalent to being directly connected with the series circuit, so that the power input can normally supply power to the rectification inverter circuit through the series circuit, and the switching of the two connection modes is controlled by the power supply control module.
Optionally, a second delay circuit is connected between the power supply control module and the relay K1.
By adopting the technical scheme, the relay K1 is started after the series-parallel switching of the input rectifying circuit is completed, so that the situation of electric sparks occurring in the switching process of the input rectifying circuit is avoided, and the switching work of the input rectifying circuit is safer.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the relay K2 and the relay K3 are connected in series, so that the possibility of action of a single relay is avoided, and the rectification inverter circuit is protected;
2. by arranging the first time delay circuit, after the series-parallel connection switching of the input rectifying circuit is completed, the rectifying inverter circuit is adjusted by the PWM controller, so that the adjusting result is more accurate;
3. by arranging the second delay circuit, after the series-parallel connection switching of the input rectifying circuit is completed, the power input is connected to the input rectifying circuit, so that the switching of the input rectifying circuit is safer.
Drawings
Fig. 1 is an overall schematic block diagram of embodiment 1 of the present application.
Fig. 2 is an overall circuit diagram of embodiment 1 of the present application.
Fig. 3 is a circuit diagram of a power supply control module according to embodiment 1 of the present application.
Fig. 4 is a circuit diagram of a second delay circuit according to embodiment 1 of the present application.
Fig. 5 is a circuit diagram of a first delay circuit according to embodiment 1 of the present application.
Fig. 6 is a circuit diagram of a power supply input in embodiment 2 of the present application.
Description of reference numerals: 1. a power supply control module; 11. a power supply controller; 12. a comparison circuit; 13. a conversion controller; 2. inputting a power supply; 31. an input rectification circuit; 32. a filter circuit; 33. an inverter circuit; 34. reducing the pressure by a main transformer; 35. an output rectifying circuit; 36. welding output; 4. a second delay circuit; 5. a PWM controller; 6. a first delay circuit; 7. a drive controller; 8. detecting current; 9. and switching the relay.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
Example 1: the embodiment of the application discloses general multi-functional welding machine of full net, this welding machine have two at least welding functions, for example contact argon arc weld, the function of manual welding. Referring to fig. 1, the general multifunctional welder for the whole network comprises a power input 2, a switching relay 9, a power supply control module 1 and two groups of rectification and inversion circuits, wherein each rectification and inversion circuit comprises an input rectification circuit 31, a filter circuit 32, an inversion circuit 33, a main transformer voltage reduction circuit 34, an output rectification circuit 35 and a welding output 36, the two input rectification circuits 31 are connected together through a series circuit and a parallel circuit, and a selection switch is arranged between the series circuit and the parallel circuit. In general, only the series circuit is conducted between the two input rectifying circuits 31. The welding output 36 is formed by two groups of rectification inverter circuits which share the same circuit. The power supply input 2 is used for being connected with a single-phase power supply and providing alternating current for the two groups of rectification inverter circuits, the power supply control module 1 judges the alternating current voltage provided by the power supply input 2, and if the voltage is overlarge, the power supply control module 1 supplies power to the switching relay 9. After the switching relay 9 is powered on, the two input rectifying circuits 31 are controlled to be switched from the series connection to the parallel connection.
Referring to fig. 1 and 2, the power supply control module 1 includes a power controller 11, a comparison circuit 12, and a conversion controller 13. The power controller 11 is coupled to the power input 2 to receive the grid voltage and convert the ac power into dc power, the dc power output by the power controller 11 has various voltages to satisfy the normal operation of the comparing circuit 12, the converting controller 13, the series circuit, and the like, and the power controller 11 further provides a dc power corresponding to the grid voltage provided by the power input 2. The comparison circuit 12 is coupled to the power controller 11 to receive the dc power corresponding to the grid voltage provided by the power input 2 and output a corresponding comparison signal, and the conversion controller 13 is coupled to the comparison circuit 12 to receive the comparison signal and control the power controller 11 to power on and off the series circuit in response to the comparison signal.
Referring to fig. 3, the power controller 11 rectifies a single-phase ac power into a dc power using a rectifier bridge, and then voltage-converts the dc power to provide a more diverse dc power having voltages of 15V and 24V. The comparator circuit 12 comprises a comparator, the type of the comparator is LM358, a positive input end of the comparator is connected with a voltage dividing circuit, an end of the voltage dividing circuit far away from the comparator is connected to the power supply controller 11 to receive direct current corresponding to the voltage of the power grid, and a negative input end of the comparator is connected with constant 5V direct current through a resistor. The comparator circuit 12 and the conversion controller 13 are connected by a photocoupler. When the comparator outputs a low level signal, the light source in the photoelectric coupler cannot generate a light signal, and the conversion controller 13 cannot be started; when the comparator outputs a high level signal, the light source in the photoelectric coupler generates a light signal, the light receiver in the conversion controller 13 is switched on, the red light emits light, then the polar capacitor E9 is charged and switched on, the relay K4 is powered on, the normally open contact J2 of the relay K4 is closed, so that the power controller 11 provides 24V direct current for the series circuit, and the indicator light emits light at the same time. The charging time is short because the capacity of the polar capacitor E9 is only 47 uF.
Referring to fig. 1 and 2, the switching relay 9 includes a slide rheostat RP1, a relay K1, a relay K2, and a relay K3. The rated operating voltage of relay K2 and relay K3 are both 12V. The power supply interface of the relay K2 and the power supply interface of the relay K3 are connected in series, so that the power controller 11 provides 24V direct current to enable the series circuit to work normally. And the normally open contact K2-1 of the relay K2 and the normally open contact K3-1 of the relay K3 are selection switches, and when the relay K2 and the relay K3 are not electrified, the normally open contact K2-1 and the normally open contact K3-1 of the relay K3 are connected with a series loop. When the relay K2 and the relay K3 are electrified, the normally open contact K2-1 and the normally open contact K3-1 of the relay K3 jump simultaneously, so that the parallel loop is conducted.
Referring to fig. 4, the normally open contact K1-1 of the relay K1 is connected in parallel with the sliding varistor RP 1. The slide rheostat RP1 is connected in series between the series circuit and the power supply input 2, and the second delay circuit 4 is connected between the relay K1 and the power supply controller 11. The second delay circuit 4 mainly plays a role in delaying time and is a polar capacitor E10, and when the polar capacitor E10 is fully charged, the power controller 11 can directly supply power to the relay K1. The capacity of the polar capacitor E10 is 100uF, which is larger than that of the polar capacitor E9, so that the charging time of the polar capacitor E10 is longer than that of the polar capacitor E9, and therefore the starting time of the relay K1 is later than that of the relay K2 and the relay K3.
Referring to fig. 1 and 2, the all-network universal multifunctional welder further comprises a driving controller 7, a PWM controller 5, a current detection 8 and a first delay circuit 6. The current detector 8 is coupled to the welding output 36 to detect the current of the welding output 36 and output a current signal, the PWM controller 5 is coupled to the current detector 8 to receive the current signal and output a corresponding adjustment signal, and the driving controller 7 is coupled to the PWM controller 5 to receive the adjustment signal and adjust the operation of the inverter circuit 33. The first delay circuit 6 is connected between the power controller 11 and the PWM controller 5, and is configured to delay a time when the PWM controller 5 transmits the adjustment signal.
Referring to fig. 5, the first delay circuit 6 controls the start of the trigger terminal of the PWM controller 5, and the second delay circuit 4 mainly functions as a polarity capacitor E11, when the polarity capacitor E11 is not fully charged, the trigger terminal of the PWM controller 5 is always grounded, and even if the power controller 11 simultaneously supplies power to the PWM controller 5, the PWM controller 5 cannot send out the adjustment signal. When the polarity capacitor E11 is fully charged, the trigger terminal of the PWM controller 5 receives a high signal, so that the PWM controller 5 can send an adjustment signal to the driving controller 7. The capacity of the polar capacitor E11 is 220uF, which is larger than that of the polar capacitor E10, so that the charging time of the polar capacitor E11 is longer than that of the polar capacitor E10, and therefore the regulated start time of the PWM controller 5 is later than that of the relay K1.
The capacities of the polar capacitors E9, E10, and E11 in the embodiment of the present application may also be adjusted according to actual use conditions, but it is to be ensured that the charging time of the polar capacitor E11 is longer than that of the polar capacitor E10, and the charging time of the polar capacitor E10 is longer than that of the polar capacitor E9.
The implementation principle of the general multifunctional welder for the whole network in the embodiment of the application is as follows:
when the alternating current voltage provided by the power input 2 is 85-280V, the power controller 11 converts the alternating current into the direct current and provides the direct current for the comparison circuit 12, the relay K1 and the PWM controller 5 at the same time, the voltage division circuit 12 receives the direct current and outputs a corresponding voltage division signal to the comparator, the comparator outputs a high level signal to enable the relay K4 to be powered on, the normally open contact J2 of the relay K4 is closed, the power controller 11 supplies power for the relay K2 and the relay K3, and the two input rectification circuits 31 are connected in parallel. The normally open contact K1-1 of the relay K1 is then closed again, causing the power input 2 to provide AC power to the input rectifier circuit 31. Then the first delay circuit ends the delay so that the PWM controller 5 can be put into operation. When the two groups of rectifying and inverting circuits work in parallel, the alternating current voltages received by the two input rectifying circuits 31 are the same, and the alternating current voltages are within the bearable range of the input rectifying circuits 31.
When the ac voltage provided by the power input 2 is 280-560V, the power controller 11 still converts the ac power into dc power and simultaneously provides dc power to the voltage divider 12, the relay K1 and the PWM controller 5. At this time, the comparator outputs a low signal, and relay K4 does not operate. The two input rectification circuits 31 are kept in series. The normally open contact K1-1 of relay K1 is then closed, causing the power input 2 to provide AC power to the input rectifier circuit 31. Then the first delay circuit ends the delay so that the PWM controller 5 can be put into operation. When the two groups of rectification inverter circuits work in series, the two input rectification circuits 31 divide the input voltage, and the voltages of the two input rectification circuits 31 are the same, that is, the alternating voltage born by each input rectification circuit 31 is 140 plus 280V, so that the input rectification circuit 31 can still work normally.
Example 2: the difference from embodiment 1 is that the power input 2 of the present embodiment can be connected not only to a single-phase power supply but also to a three-phase power supply. Referring to fig. 6, the power input 2 includes three rectifier bridges and three input nodes a1-A3, the three input nodes respectively correspond to the three rectifier bridges, each input node is electrically connected to two input terminals of the corresponding rectifier bridge, the positive output terminals of the three rectifier bridges are connected together, and the negative output terminals of the three rectifier bridges are connected together. A switch SB1 is connected in series between each input node and the corresponding rectifier bridge, a switch SB1 is a linked switch, and when the switch SB1 is closed, the three input nodes can be simultaneously communicated with the three rectifier bridges; conversely, the three input nodes can be disconnected from the rectifier bridge simultaneously.
When the welder is connected with a three-phase power supply, the three input nodes are respectively connected with three phase lines of the power supply. When the welder is connected to a single phase power source, any two of the three input nodes are selected to connect to the positive and negative lines of the power source.
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 (7)
1. The utility model provides a general multi-functional welding machine of whole net, includes power input (2), two sets of rectification inverter circuit (33), relay K2 and relay K3, relay K2 and relay K3 are used for controlling the series connection, the parallel connection of two sets of rectification inverter circuit, its characterized in that: the power supply control module (1) is characterized in that the relay K2 and the relay K3 are connected in series to form a series circuit, one end of the power supply control module (1) is coupled to the power input (2) to receive the voltage of the power input (2) and supply and cut off power to the series circuit according to the voltage;
the rectifying and inverting circuit comprises an input rectifying circuit (31), a filter circuit (32), an inverting circuit (33), a main transformer voltage reduction (34), an output rectifying circuit (35) and a welding output (36), wherein the input rectifying circuit (31), the filter circuit (32), the inverting circuit (33), the main transformer voltage reduction (34), the output rectifying circuit (35) and the welding output (36) are sequentially and electrically connected together.
2. The full-network general multifunctional welding machine according to claim 1, characterized in that: the power supply control module (1) comprises a power supply controller (11), a comparison circuit (12) and a conversion controller (13), wherein the power supply controller (11) is coupled to the power supply input (2) to receive the power grid voltage and convert the power grid voltage into direct current, the comparison circuit (12) is coupled to the power supply controller (11) to receive the direct current and compare the direct current with a preset value to output a corresponding comparison signal, and the conversion controller (13) is coupled to the comparison circuit (12) to receive the comparison signal and respond to the comparison signal to control the power supply and the power cut-off of the series circuit.
3. The full-network general multifunctional welding machine according to claim 1, characterized in that: the inverter circuit (33) employs an IGBT of DC 650V.
4. The full-network general multifunctional welding machine according to claim 1, characterized in that: the welding power supply control device comprises a power supply control module (1), a drive controller (7), a PWM controller (5) and a current detection module (8), wherein the power supply control module (1) is used for controlling starting of the PWM controller (5), the current detection module (8) is coupled to a welding output (36) to detect current of the welding output (36) and output a current signal, the PWM controller (5) is coupled to the current detection module (8) to receive the current signal and output a corresponding regulating signal, and the drive controller (7) is coupled to the PWM controller (5) to receive the regulating signal and adjust working of an inverter circuit (33).
5. The full-network universal multifunctional welding machine as claimed in claim 4, wherein: and a first time delay circuit (6) is connected between the PWM controller (5) and the drive controller (7).
6. The full-network general multifunctional welding machine according to claim 1, characterized in that: the power supply control module further comprises a slide rheostat RP1 and a relay K1, the slide rheostat RP1 is connected between the series circuit and the power supply input (2) in series, a normally open contact K1-1 of the relay K1 is connected to two ends of the slide rheostat RP1 in parallel, and the power supply control module (1) controls the opening and closing of the relay K1 according to whether the power supply input (2) provides voltage or not.
7. The full-network universal multifunctional welding machine according to claim 6, characterized in that: and a second delay circuit (4) is connected between the power supply control module (1) and the relay K1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023016564.4U CN215545667U (en) | 2020-12-14 | 2020-12-14 | General multi-functional welding machine of whole net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023016564.4U CN215545667U (en) | 2020-12-14 | 2020-12-14 | General multi-functional welding machine of whole net |
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| Publication Number | Publication Date |
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| CN215545667U true CN215545667U (en) | 2022-01-18 |
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| CN202023016564.4U Active CN215545667U (en) | 2020-12-14 | 2020-12-14 | General multi-functional welding machine of whole net |
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Denomination of utility model: A multifunctional welding machine for all networks Effective date of registration: 20220929 Granted publication date: 20220118 Pledgee: Zhejiang Tyrone commercial bank Limited by Share Ltd. Taizhou Wenling branch Pledgor: WENLING AVATAR ELECTROMECHANICS MANUFACTURE Co.,Ltd. Registration number: Y2022980017164 |