CN208836009U - A kind of control circuit and device of the inversion welding/cutting power supply for Width funtion input - Google Patents
A kind of control circuit and device of the inversion welding/cutting power supply for Width funtion input Download PDFInfo
- Publication number
- CN208836009U CN208836009U CN201821301477.3U CN201821301477U CN208836009U CN 208836009 U CN208836009 U CN 208836009U CN 201821301477 U CN201821301477 U CN 201821301477U CN 208836009 U CN208836009 U CN 208836009U
- Authority
- CN
- China
- Prior art keywords
- switch
- output end
- module
- input
- change
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model belongs to electronic circuit technology field, provide the control circuit and device of a kind of inversion welding/cutting power supply for Width funtion input, by sequentially being rectified to the input signal of three phase mains, inversion, voltage transformation, secondary rectification and filtering rear-guard dynamic load, wherein, it whether is more than preset threshold according to the voltage value of the input signal after rectification, automatically switch to carry out inversion to it using semi-bridge inversion or full-bridge inverting, and the phase of corresponding bridge arm is set as consistent, it is thus achieved that can be according to the height of network pressure under the premise of not changing transformer device structure, automatically switched between full-bridge inverting and semi-bridge inversion, and corresponding adjustment phase place relationship, reduce transformer cost and difficulty of processing；The control circuit applies also for three-phase, large-power occasions simultaneously, and applicability is wider.
Description
Technical field
The utility model belongs to electronic circuit technology field more particularly to a kind of inversion welding electricity for Width funtion input
The control circuit and device in source.
Background technique
It is increasingly progressive with welding/cutting power supply technology with the development of modern industry, the application field of domestic welding/cutting power supply also by
Domestic market gradually extends to overseas market.However, new opportunity can bring about new challenge, due to the power grid of every country
Voltage difference is larger, and it is not applicable abroad to encounter input voltage according to the welding/cutting power supply sale of domestic network pressure standard design
The case where.Therefore, it is necessary to the welding/cutting power supplies that the network pressure according to country variant designs different input voltage ranges.Application is universal at present
For three-phase input mainly tapped transformer scheme, for single-phase input mainly voltage multiplying rectifier scheme.
It is following that tapped transformer scheme is illustrated by taking full-bridge inverting as an example, as shown in Figure 1, VT1~VT4 and transformation in figure
Device T1 collectively constitutes full bridge inverter, and K1 is transformer tapping switching switch.Network voltage is detected first, according to what is detected
Voltage value determine 1 foot of change-over switch K1 and 2 feet connect still 1 foot and 3 feet are connected.It is connect when work is in high voltage input
Enter the turn ratio of the transformer primary winding of circuit when work accesses the transformer primary winding of circuit when low-voltage inputs
The number of turns is more.Assuming that the input range that welding/cutting power supply allows is V1~V3 (V1 < V3), and between V2 between V1 and V3, i.e. V1 < V2 < V3.
When the voltage detected between vl and v 2 when, it is believed that welding machine is work in low input state, control system control conversion
1 foot of switch K1 and 2 feet are connected, and the winding between 6 feet and 8 feet of transformer T1 has electric current to flow through, between 8 feet and 9 feet around
The no electric current of group flows through.When the voltage detected is between V2 and V3, it is believed that welding machine is work in high input voltage state, control
1 foot and 3 feet of system control change-over switch K1 processed is connected, and the entire winding between 6 feet and 9 feet of transformer T1 has electric current stream
It crosses.
In single-phase input, low power welding/cutting power supply, voltage multiplying rectifier scheme is also used, as shown in Figure 2.With above-mentioned tap
Transformer scheme is the same, and control circuit is needed to be monitored network pressure, when detecting input is high voltage, controls change-over switch
The 1 of K1 is connected with 2, and at this moment, M and N are disconnected, and as common current rectifying and wave filtering circuit does not have multiplication of voltage function；When detecting that input is
When low-voltage, the 1 of control change-over switch K1 is connected with 3, and at this moment, M is connected with N, realizes voltage multiplying rectifier.The charge path of C1 is A
The charge path of → D1 → C1 → N → M → B, C2 are B → M → N → C2 → D3 → A, C1, and the voltage at the both ends C2 is equal to input
Voltage, so the input voltage that output voltage is twice, that is, realize multiplication of voltage function.
Therefore, the existing control technology for welding/cutting power supply is there is using the then more windings of tapped transformer,
Transformer increased costs and coiling difficulty are caused to become larger；Single-phase, weak machine, Wu Faying are then only used for using voltage multiplying rectifier
The problem of for three-phase, large-power occasions.
Utility model content
The purpose of this utility model is to provide it is a kind of for Width funtion input inversion welding/cutting power supply control circuit and
Device, it is intended to solve the existing control technology for welding/cutting power supply there is using the then more windings of tapped transformer,
Transformer increased costs and coiling difficulty are caused to become larger；Single-phase, weak machine, Wu Faying are then only used for using voltage multiplying rectifier
The problem of for three-phase, large-power occasions.
The utility model first aspect provides a kind of control circuit of inversion welding/cutting power supply for Width funtion input, institute
Stating control circuit includes:
For receiving the input signal of three phase mains, and to the first rectification module that the input signal is rectified；
It is connected with the rectification module, for carrying out the inverter module of inversion to the input signal after rectification；
It is connected with the inverter module, for carrying out the transformation mould of voltage transformation to the input signal after inversion
Block；
It is connected with the voltage changing module, for carrying out the second of secondary rectification to the input signal after voltage transformation
Rectification module；
It is connected with the secondary rectification module, for being filtered to the input signal after secondary rectification, and drives
The filter module of dynamic load；
It is connected with first rectification module and the inverter module, for according to the input signal after rectification
Voltage value whether be more than preset threshold, controlling the inverter module is carried out by the way of semi-bridge inversion or full-bridge inverting
The control module of inversion；And
It is connected with the inverter module, for driving the consistent driving mould of phase for corresponding to bridge arm in the inverter module
Block.
The utility model second aspect provides a kind of control device of inversion welding/cutting power supply for Width funtion input, packet
Control circuit, and the three phase mains being connected with the control circuit and load are included, the control circuit includes:
For receiving the input signal of the three phase mains, and to the first rectification mould that the input signal is rectified
Block；
It is connected with the rectification module, for carrying out the inverter module of inversion to the input signal after rectification；
It is connected with the inverter module, for carrying out the transformation mould of voltage transformation to the input signal after inversion
Block；
It is connected with the voltage changing module, for carrying out the second of secondary rectification to the input signal after voltage transformation
Rectification module；
It is connected with the secondary rectification module, for being filtered to the input signal after secondary rectification, and drives
Move the filter module of the load；
It is connected with first rectification module and the inverter module, for according to the input signal after rectification
Voltage value whether be more than preset threshold, controlling the inverter module is carried out by the way of semi-bridge inversion or full-bridge inverting
The control module of inversion；And
It is connected with the inverter module, for driving the consistent driving mould of phase for corresponding to bridge arm in the inverter module
Block.
The control circuit and device of a kind of inversion welding/cutting power supply for Width funtion input provided by the utility model, pass through
Sequentially the input signal of three phase mains is rectified, inversion, voltage transformation, it is secondary rectification and filtering rear-guard dynamic load,
In, whether it is more than preset threshold according to the voltage value of the input signal after rectification, automatically switches to use semi-bridge inversion or full-bridge
Inversion carries out inversion to it, and the phase of corresponding bridge arm is set as unanimously, it is thus achieved that before not changing transformer device structure
Putting can be automatically switched between full-bridge inverting and semi-bridge inversion according to the height of network pressure, and corresponding adjustment phase place relationship,
Reduce transformer cost and difficulty of processing；The control circuit applies also for three-phase, large-power occasions simultaneously, applicability compared with
Extensively, it solves the existing control technology for welding/cutting power supply there is using the then more windings of tapped transformer, causes
Transformer increased costs and coiling difficulty become larger；It is then only used for single-phase, weak machine using voltage multiplying rectifier, can not be applied to
The problem of three-phase, large-power occasions.
Detailed description of the invention
Fig. 1 is the exemplary circuit figure for the tapped transformer scheme that the prior art is related to.
Fig. 2 is the exemplary circuit figure for the voltage multiplying rectifier scheme that the prior art is related to.
Fig. 3 is a kind of control circuit of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
Modular structure schematic diagram.
Fig. 4 is a kind of control circuit of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
Exemplary circuit figure.
Fig. 5 is a kind of control circuit of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
The exemplary circuit figure of middle drive module.
Fig. 6 is a kind of control circuit of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
The physical circuit connection schematic diagram of inverter module when three phase mains exports low voltage signal.
Fig. 7 is a kind of control circuit of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
The physical circuit connection schematic diagram of inverter module when three phase mains output HIGH voltage signal.
Fig. 8 is a kind of control circuit of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
The physical circuit connection schematic diagram of drive module when middle inverter module uses full-bridge inverting.
Fig. 9 is a kind of control circuit of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
The waveform diagram of each switching tube output signal when middle inverter module is using full-bridge inverting.
Figure 10 is a kind of control electricity of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
The physical circuit connection schematic diagram of drive module when inverter module uses semi-bridge inversion in road.
Figure 11 is a kind of control electricity of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
The waveform diagram of each switching tube output signal when inverter module is using semi-bridge inversion in road.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
The control circuit and device of a kind of above-mentioned inversion welding/cutting power supply for Width funtion input, are not changing transformer
Can be according to the height of network pressure under the premise of structure, the opening up of inverter circuit mends structure can automatically switch between full-bridge and half-bridge
Circuit arrangement.When input is low-voltage, using full bridge inverter；When input is high voltage, using semi-bridge inversion electricity
Road.The scheme that benefit mode can automatically switch is opened up due to using inverter circuit, needs to change main transformer knot to solve
The problem of structure and adjustment switching tube capacity, reduction transformer cost and difficulty of processing are reached, transformer and switching tube can be with
The general effect with conventional type, and the control circuit can be applied to three-phase, large-power occasions.
Fig. 3 shows a kind of control of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
The modular structure of circuit, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
A kind of control circuit of above-mentioned inversion welding/cutting power supply for Width funtion input, the control circuit include the first rectification
Module 102, inverter module 103, voltage changing module 104, the second rectification module 105, filter module 106, control module 108 and drive
Dynamic model block 109.
First rectification module 102 is used to receive the input signal of three phase mains 101, and carries out to the input signal whole
Stream.
Inverter module 103 is connected with rectification module 102, for carrying out inversion to the input signal after rectification.
Voltage changing module 104 is connected with inverter module 103, for carrying out voltage change to the input signal after inversion
It changes.
Second rectification module 105 is connected with voltage changing module 104, for carrying out to the input signal after voltage transformation
Secondary rectification.
Filter module 106 is connected with secondary rectification module 105, for carrying out to the input signal after secondary rectification
Filtering, and drive load 107.
Control module 108 is connected with the first rectification module 102 and inverter module 103, for according to the institute after rectification
Whether the voltage value for stating input signal is more than preset threshold, and control inverter module 103 is using semi-bridge inversion or full-bridge inverting
Mode carry out inversion.
Drive module 109 is connected with inverter module 103, for driving the phase one for corresponding to bridge arm in inverter module 103
It causes.
As an embodiment of the present invention, the benefit structure of opening up of inverter module 103 can be automatic between full-bridge and half-bridge
Switching.When input is low-voltage, using full bridge inverter；When input is high voltage, using half-bridge inversion circuit.Thus
Achieve the effect that automatic adaptation input voltage, meanwhile, by drive module 109 to the power device in inverter module 103
Phase relation adjusts accordingly, so that the phase of corresponding bridge arm is consistent.
Fig. 4 shows a kind of control of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
The exemplary circuit of circuit, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
As an embodiment of the present invention, above-mentioned control module 108 includes:
For obtaining the voltage isolation detection unit 1081 of the voltage value of the input signal after rectifying；With
Detection unit 1081 is isolated from voltage to be connected, when for judging that the voltage value is more than the preset threshold, control
Inverter module 103 processed is controlled inverse by the way of semi-bridge inversion, and when judging that the voltage value is less than the preset threshold
Become change-over switch control unit 1082 of the module 103 by the way of full-bridge inverting.
As an embodiment of the present invention, above-mentioned inverter module 103 includes first switch tube (Fig. 4 is indicated using VT1),
Second switch (Fig. 4 is indicated using VT2), third switching tube (Fig. 4 is indicated using VT3), (Fig. 4 uses VT4 table to the 4th switching tube
Show), the first change-over switch K1, the second change-over switch K2, first capacitor C1 and the second capacitor C2.
The first end of the input terminal of first switch tube VT1 and the input terminal of third switching tube VT3 and first capacitor C1 is total
It connects, the output end of first switch tube VT1, the input terminal of second switch VT2, the third pin of the first change-over switch K1 and
The second pin of two change-over switch K2 connects altogether, the first end and the second conversion of the second end of first capacitor C1 and the second capacitor C2
The third pin of switch K2 connects altogether, and the input terminal of the output end and the 4th switching tube VT4 of third switching tube VT3 connects altogether, the second electricity
The second end for holding C2 connects altogether with the output end of second switch VT2 and the output end of the 4th switching tube VT4, the first change-over switch
The second pin of K1 is hanging, and the first pin of the first pin of the first change-over switch K1 and the second change-over switch K2 connect voltage changing module
104, the controlled end of first switch tube VT1, the controlled end of second switch VT2, third switching tube VT3 controlled end and the 4th
The controlled termination drive module 109 of switching tube VT4.
Specifically, above-mentioned first switch tube VT1 is specially the first field-effect tube,
Drain electrode, source electrode and the grid of first field-effect tube are respectively the input terminal, defeated of the first switch tube VT1
Outlet and controlled end；
Above-mentioned second switch VT2 is specially the second field-effect tube,
Drain electrode, source electrode and the grid of second field-effect tube are respectively the input terminal, defeated of the second switch VT2
Outlet and controlled end；
Above-mentioned third switching tube VT3 is specially third field-effect tube,
Drain electrode, source electrode and the grid of the third field-effect tube are respectively the input terminal, defeated of the third switching tube VT3
Outlet and controlled end；
Above-mentioned 4th switching tube VT4 is specially the 4th field-effect tube,
Drain electrode, source electrode and the grid of 4th field-effect tube are respectively the input terminal, defeated of the 4th switching tube VT4
Outlet and controlled end.
Certainly, above-mentioned inverter module 103 may also include third capacitor C3, the first end and third switching tube of third capacitor C3
The input terminal of the output end of VT3 and the 4th switching tube VT4 connect altogether, and the second end of third capacitor C3 is with the first change-over switch K1's
The input terminal of the primary coil of first pin and transformer T1 connects altogether.Also, above-mentioned first capacitor C1 and the second capacitor C2 are
Filter capacitor, third capacitor C3 are capacitance.
As an embodiment of the present invention, above-mentioned first rectification module 102 includes three-phase rectification bridge, the three phase rectifier
Bridge respectively rectifies A phase electricity, B phase electricity and the C phase electricity of three phase mains 101.
As an embodiment of the present invention, above-mentioned voltage changing module 104 include transformer T1, the transformer T1 for pair
The AC signal that inverter module 103 exports carries out voltage transformation (including boost and be depressured) and is exported afterwards to the second rectification module 105.
The first pin of the first change-over switch K1 of input termination of the primary coil of transformer T1, the output of the primary coil of transformer T1
Terminate the first pin of the second change-over switch K2, the input terminal and output the second rectification module of termination of the secondary coil of transformer T1
105。
As an embodiment of the present invention, above-mentioned secondary rectification module 105 is realized using existing rectification circuit, above-mentioned
Filter module 106 is also realized using existing filter circuit.
Fig. 5 shows a kind of control of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
The exemplary circuit of drive module in circuit, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
As an embodiment of the present invention, above-mentioned drive module 109 includes PWM driving unit 1091, the first power list
First 1092, second power cell 1093, third change-over switch K3 and the 4th change-over switch K4.
The first input end and the 4th conversion of first output end of PWM driving unit 1091 and the first power cell 1092
The first pin of switch K4 connects altogether, the second input of the second output terminal of PWM driving unit 1091 and the first power cell 1092
The first pin of end and third change-over switch K3 connect altogether, and the second pin of third change-over switch K3 is with the 4th change-over switch K4's
The first input end of third pin and the second power cell 1093 connects altogether, the third pin of third change-over switch K3 and the 4th turn
Second input terminal of the second pin and the second power cell 1093 of changing switch K4 connects altogether, and the first of the first power cell 1092
Output end and second output terminal connect the controlled end and output end of first switch tube VT1, the third of the first power cell 1092 respectively
Output end and the 4th output end connect the output end and controlled end of second switch VT2 respectively, and the first of the second power cell 1093
Output end and second output terminal connect the controlled end and output end of third switching tube VT3, the third of the second power cell 1093 respectively
Output end and the 4th output end connect the output end and controlled end of the 4th switching tube VT4 respectively.
Fig. 6 and Fig. 7 respectively illustrates a kind of inversion welding for Width funtion input provided by the embodiment of the utility model
The control circuit of power supply when three phase mains export low voltage signal when inverter module physical circuit and when three phase mains export
The physical circuit of inverter module when high voltage signal, for ease of description, only the parts related to this embodiment are shown, is described in detail
It is as follows:
Turn as an embodiment of the present invention when voltage isolation detection unit 1081 detects that input is low-voltage
The first pin for changing first change-over switch K1 of the control of switch control unit 1082 is connected with second pin, and the second conversion of control
The first pin of switch K2 is connected with second pin, forms a typical full bridge inverter, as shown in Figure 6.
When voltage isolation detection unit 1081 detects that input is high voltage, the control of change-over switch control unit 1,082 the
The first pin of one change-over switch K1 is connected with third pin, and the first pin and third of the second change-over switch K2 of control draw
Foot is connected, and at this moment first switch tube VT1 and third switching tube VT3 are in parallel, and second switch VT2 and the 4th switching tube VT4 are in parallel,
With regard to forming a typical half-bridge inversion circuit, as shown in Figure 7.
Fig. 8 and Figure 10 respectively illustrates a kind of inversion welding for Width funtion input provided by the embodiment of the utility model
The physical circuit and inverter module of drive module are inverse using half-bridge when inverter module uses full-bridge inverting in the control circuit of power supply
It is defeated using each switching tube when full-bridge inverting that the physical circuit of drive module when change, Fig. 9 and Figure 11 respectively illustrate inverter module
The waveform of each switching tube output signal when the waveform of signal and inverter module are using semi-bridge inversion out, for ease of description, only
Part related to the present embodiment is shown, details are as follows:
First power cell 1092 exports two-way driving signal G1E1 and G2E2, respectively drives first switch tube VT1 and the
Two switching tube VT2；Second power cell 1093 exports two-way driving signal G3E3 and G4E4, respectively drives third switching tube VT3
With the 4th switching tube VT4.180 ° of G1E1 and G2E2 phase difference, 180 ° of G3E3 and G4E4 phase difference, guarantee two on same bridge arm
Straight-through phenomenon will not occur for a power tube.When the work of inverter module 103 is in full-bridge mode, it is desirable that first switch tube VT1 and the
Four switching tube VT4 same-phases, second switch VT2 and third switching tube VT3 same-phase, as shown in Figure 9.
It is assumed that the first power cell 1092 and the second power cell 1093 are just the same, this phase relation is realized, need
The first pin of control circuit control third change-over switch K3 is wanted to connect with second pin, and the 4th change-over switch K4 of control
First pin is connected with second pin, i.e., by the first input end A of the first power cell 1092 and the second power cell 1093
Second input terminal B is connected to together, defeated by the first of the second input terminal B of the first power cell 1092 and the second power cell 1093
Enter to hold A to be connected to together, as shown in Figure 8.
When the work of inverter module 103 is in half-bridge mode, first switch tube VT1 and third switching tube VT3 are in parallel, and second opens
It closes pipe VT2 and the 4th switching tube VT4 is in parallel, at this moment require first switch tube VT1 and third switching tube VT3 same-phase, second opens
Pipe VT2 and the 4th switching tube VT4 same-phase are closed, as shown in figure 11.Need the first of control circuit control third change-over switch K3
Pin is connected with third pin, and the first pin of the 4th change-over switch K4 of control is connected with third pin, i.e., by the first function
The first input end A of the first input end A of rate unit 1092 and the second power cell 1093 is connected to together, by the first power cell
1092 the second input terminal B and the second input terminal B of the second power cell 1093 are connected to together, as shown in Figure 10.
The utility model additionally provides a kind of control device of inversion welding/cutting power supply for Width funtion input, including control
Circuit, and the three phase mains being connected with the control circuit and load, the control circuit are as described above.
Below in conjunction with Fig. 3-Figure 11, to the above-mentioned a kind of control circuit and dress of the inversion welding/cutting power supply for Width funtion input
The working principle set is described as follows:
Firstly, being monitored to network pressure, and logic analysis is carried out to the voltage value detected and then change-over switch is made
Corresponding control.When voltage isolation detection unit 1081 detects that input is low-voltage, change-over switch control unit 1082 is controlled
The first pin for making the first change-over switch K1 is connected with second pin, and the first pin and the of the second change-over switch K2 of control
Two pins are connected, and a typical full bridge inverter is formed；When voltage isolation detection unit 1081 detects input for high electricity
When pressure, the first pin that change-over switch control unit 1082 controls the first change-over switch K1 is connected with third pin, and control
The first pin of second change-over switch K2 is connected with third pin, and at this moment first switch tube VT1 and third switching tube VT3 are in parallel,
Second switch VT2 and the 4th switching tube VT4 are in parallel, just form a typical half-bridge inversion circuit.
Secondly, having achieved the purpose that automatic adaptation input voltage by the connection type for changing power device.Certainly, power
The phase relation of device drive will also do corresponding adjustment.
First power cell 1092 exports two-way driving signal G1E1 and G2E2, respectively drives first switch tube VT1 and the
Two switching tube VT2；Second power cell 1093 exports two-way driving signal G3E3 and G4E4, respectively drives third switching tube VT3
With the 4th switching tube VT4.180 ° of G1E1 and G2E2 phase difference, 180 ° of G3E3 and G4E4 phase difference, guarantee two on same bridge arm
Straight-through phenomenon will not occur for a power tube.When the work of inverter module 103 is in full-bridge mode, it is desirable that first switch tube VT1 and the
Four switching tube VT4 same-phases, second switch VT2 and third switching tube VT3 same-phase.
It is assumed that the first power cell 1092 and the second power cell 1093 are just the same, this phase relation is realized, need
The first pin of control circuit control third change-over switch K3 is wanted to connect with second pin, and the 4th change-over switch K4 of control
First pin is connected with second pin, i.e., by the first input end A of the first power cell 1092 and the second power cell 1093
Second input terminal B is connected to together, defeated by the first of the second input terminal B of the first power cell 1092 and the second power cell 1093
Enter A is held to be connected to together.
When the work of inverter module 103 is in half-bridge mode, first switch tube VT1 and third switching tube VT3 are in parallel, and second opens
It closes pipe VT2 and the 4th switching tube VT4 is in parallel, at this moment require first switch tube VT1 and third switching tube VT3 same-phase, second opens
Close pipe VT2 and the 4th switching tube VT4 same-phase.The first pin and third for needing control circuit control third change-over switch K3 draw
Foot is connected, and the first pin of the 4th change-over switch K4 of control is connected with third pin, i.e., by the first power cell 1092
The first input end A of first input end A and the second power cell 1093 is connected to together, defeated by the second of the first power cell 1092
Enter to hold the second input terminal B of B and the second power cell 1093 to be connected to together.
Above scheme is to increase four under the premise of not changing basic type main transformer structure and circuit structure and turn
It changes switch and changes control strategy to realize the transformation inputted from single voltage input to gamut Width funtion.To design width later
Voltage input welding/cutting power supply provides a convenient, modular design architecture.
To sum up, the control circuit of a kind of inversion welding/cutting power supply for Width funtion input provided by the embodiment of the utility model
And device, by sequentially being rectified to the input signal of three phase mains, after inversion, voltage transformation, secondary rectification and filtering
Driving load, wherein according to the voltage value of the input signal after rectification whether be more than preset threshold, automatically switch inverse using half-bridge
Become or full-bridge inverting carries out inversion to it, and the phase of corresponding bridge arm is set as unanimously, it is thus achieved that not changing transformation
It can be automatically switched between full-bridge inverting and semi-bridge inversion according to the height of network pressure under the premise of device structure, and accordingly be adjusted
Whole phase relation reduces transformer cost and difficulty of processing；The control circuit applies also for three-phase, high-power field simultaneously
Close, applicability is wider, solve the existing control technology for welding/cutting power supply there is using tapped transformer then more than one
A winding causes transformer increased costs and coiling difficulty to become larger；Single-phase, small-power machine is then only used for using voltage multiplying rectifier
Device, can not be applied to three-phase, large-power occasions the problem of.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of control circuit of the inversion welding/cutting power supply for Width funtion input, which is characterized in that the control circuit includes:
For receiving the input signal of three phase mains, and to the first rectification module that the input signal is rectified；
It is connected with the rectification module, for carrying out the inverter module of inversion to the input signal after rectification；
It is connected with the inverter module, for carrying out the voltage changing module of voltage transformation to the input signal after inversion；
It is connected with the voltage changing module, for carrying out the second rectification of secondary rectification to the input signal after voltage transformation
Module；
It is connected with the secondary rectification module, for being filtered to the input signal after secondary rectification, and drives negative
The filter module of load；
It is connected with first rectification module and the inverter module, for the electricity according to the input signal after rectification
Whether pressure value is more than preset threshold, and controlling the inverter module is that inversion is carried out by the way of semi-bridge inversion or full-bridge inverting
Control module；And
It is connected with the inverter module, for driving the consistent drive module of phase for corresponding to bridge arm in the inverter module.
2. control circuit as described in claim 1, which is characterized in that the control module includes:
For obtaining the voltage isolation detection unit of the voltage value of the input signal after rectifying；With
Being connected with the voltage isolation detection unit, when for judging that the voltage value is more than the preset threshold, controlling institute
When stating inverter module by the way of semi-bridge inversion, and judging that the voltage value is less than the preset threshold, described in control
Change-over switch control unit of the inverter module by the way of full-bridge inverting.
3. control circuit as described in claim 1, which is characterized in that the inverter module includes:
First switch tube, second switch, third switching tube, the 4th switching tube, the first change-over switch, the second change-over switch,
One capacitor and the second capacitor；
The first end of the input terminal and the first capacitor of the input terminal of the first switch tube and the third switching tube is total
Connect, the output end of the first switch tube, the input terminal of the second switch, first change-over switch third pin with
And the second pin of second change-over switch connects altogether, the first end of the second end of the first capacitor and second capacitor with
And the third pin of second change-over switch connects altogether, the input of the output end of the third switching tube and the 4th switching tube
End connects altogether, the output end of the second end of second capacitor and the output end of the second switch and the 4th switching tube
It connects altogether, the second pin of first change-over switch is hanging, the first pin of first change-over switch and second conversion
First pin of switch connects the voltage changing module, the controlled end of the first switch tube, the controlled end of the second switch, institute
State the controlled end of third switching tube and the controlled termination drive module of the 4th switching tube.
4. control circuit as claimed in claim 3, which is characterized in that the drive module includes:
PWM driving unit, the first power cell, the second power cell, third change-over switch and the 4th change-over switch；
The first input end and the 4th conversion of first output end of the PWM driving unit and first power cell
First pin of switch connects altogether, the second input terminal of the second output terminal of the PWM driving unit and first power cell
And the first pin of the third change-over switch connects altogether, the second pin of the third change-over switch is opened with the 4th conversion
The first input end of the third pin of pass and second power cell connects altogether, the third pin of the third change-over switch with
The second pin of 4th change-over switch and the second input terminal of second power cell connect altogether, the first power list
The first output end and second output terminal of member connect the controlled end and output end of the first switch tube, the first power list respectively
The third output end and the 4th output end of member connect the output end and controlled end of the second switch, the second power list respectively
The first output end and second output terminal of member connect the controlled end and output end of the third switching tube, the second power list respectively
The third output end and the 4th output end of member connect the output end and controlled end of the 4th switching tube respectively.
5. control circuit as claimed in claim 3, which is characterized in that the first switch tube is specially the first field-effect tube,
Drain electrode, source electrode and the grid of first field-effect tube be respectively the input, output end of the first switch tube with
And controlled end；
The second switch is specially the second field-effect tube,
Drain electrode, source electrode and the grid of second field-effect tube be respectively the input, output end of the second switch with
And controlled end；
The third switching tube is specially third field-effect tube,
Drain electrode, source electrode and the grid of the third field-effect tube be respectively the input, output end of the third switching tube with
And controlled end；
4th switching tube is specially the 4th field-effect tube,
Drain electrode, source electrode and the grid of 4th field-effect tube be respectively the input, output end of the 4th switching tube with
And controlled end.
6. a kind of control device of the inversion welding/cutting power supply for Width funtion input, including control circuit, and with the control
The three phase mains and load that circuit is connected, which is characterized in that the control circuit includes:
For receiving the input signal of the three phase mains, and to the first rectification module that the input signal is rectified；
It is connected with the rectification module, for carrying out the inverter module of inversion to the input signal after rectification；
It is connected with the inverter module, for carrying out the voltage changing module of voltage transformation to the input signal after inversion；
It is connected with the voltage changing module, for carrying out the second rectification of secondary rectification to the input signal after voltage transformation
Module；
It is connected with the secondary rectification module, for being filtered to the input signal after secondary rectification, and drives institute
State the filter module of load；
It is connected with first rectification module and the inverter module, for the electricity according to the input signal after rectification
Whether pressure value is more than preset threshold, and controlling the inverter module is that inversion is carried out by the way of semi-bridge inversion or full-bridge inverting
Control module；And
It is connected with the inverter module, for driving the consistent drive module of phase for corresponding to bridge arm in the inverter module.
7. control device as claimed in claim 6, which is characterized in that the control module includes:
For obtaining the voltage isolation detection unit of the voltage value of the input signal after rectifying；With
Being connected with the voltage isolation detection unit, when for judging that the voltage value is more than the preset threshold, controlling institute
When stating inverter module by the way of semi-bridge inversion, and judging that the voltage value is less than the preset threshold, described in control
Change-over switch control unit of the inverter module by the way of full-bridge inverting.
8. control device as claimed in claim 6, which is characterized in that the inverter module includes:
First switch tube, second switch, third switching tube, the 4th switching tube, the first change-over switch, the second change-over switch,
One capacitor and the second capacitor；
The first end of the input terminal and the first capacitor of the input terminal of the first switch tube and the third switching tube is total
Connect, the output end of the first switch tube, the input terminal of the second switch, first change-over switch third pin with
And the second pin of second change-over switch connects altogether, the first end of the second end of the first capacitor and second capacitor with
And the third pin of second change-over switch connects altogether, the input of the output end of the third switching tube and the 4th switching tube
End connects altogether, the output end of the second end of second capacitor and the output end of the second switch and the 4th switching tube
It connects altogether, the second pin of first change-over switch is hanging, the first pin of first change-over switch and second conversion
First pin of switch connects the voltage changing module, the controlled end of the first switch tube, the controlled end of the second switch, institute
State the controlled end of third switching tube and the controlled termination drive module of the 4th switching tube.
9. control device as claimed in claim 8, which is characterized in that the drive module includes:
PWM driving unit, the first power cell, the second power cell, third change-over switch and the 4th change-over switch；
The first input end and the 4th conversion of first output end of the PWM driving unit and first power cell
First pin of switch connects altogether, the second input terminal of the second output terminal of the PWM driving unit and first power cell
And the first pin of the third change-over switch connects altogether, the second pin of the third change-over switch is opened with the 4th conversion
The first input end of the third pin of pass and second power cell connects altogether, the third pin of the third change-over switch with
The second pin of 4th change-over switch and the second input terminal of second power cell connect altogether, the first power list
The first output end and second output terminal of member connect the controlled end and output end of the first switch tube, the first power list respectively
The third output end and the 4th output end of member connect the output end and controlled end of the second switch, the second power list respectively
The first output end and second output terminal of member connect the controlled end and output end of the third switching tube, the second power list respectively
The third output end and the 4th output end of member connect the output end and controlled end of the 4th switching tube respectively.
10. control device as claimed in claim 8, which is characterized in that the first switch tube is specially the first field-effect tube,
Drain electrode, source electrode and the grid of first field-effect tube be respectively the input, output end of the first switch tube with
And controlled end；
The second switch is specially the second field-effect tube,
Drain electrode, source electrode and the grid of second field-effect tube be respectively the input, output end of the second switch with
And controlled end；
The third switching tube is specially third field-effect tube,
Drain electrode, source electrode and the grid of the third field-effect tube be respectively the input, output end of the third switching tube with
And controlled end；
4th switching tube is specially the 4th field-effect tube,
Drain electrode, source electrode and the grid of 4th field-effect tube be respectively the input, output end of the 4th switching tube with
And controlled end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821301477.3U CN208836009U (en) | 2018-08-13 | 2018-08-13 | A kind of control circuit and device of the inversion welding/cutting power supply for Width funtion input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821301477.3U CN208836009U (en) | 2018-08-13 | 2018-08-13 | A kind of control circuit and device of the inversion welding/cutting power supply for Width funtion input |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208836009U true CN208836009U (en) | 2019-05-07 |
Family
ID=66309083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821301477.3U Active CN208836009U (en) | 2018-08-13 | 2018-08-13 | A kind of control circuit and device of the inversion welding/cutting power supply for Width funtion input |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208836009U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067192A (en) * | 2018-08-13 | 2018-12-21 | 深圳市佳士科技股份有限公司 | A kind of control circuit and device of the inversion welding/cutting power supply for Width funtion input |
-
2018
- 2018-08-13 CN CN201821301477.3U patent/CN208836009U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067192A (en) * | 2018-08-13 | 2018-12-21 | 深圳市佳士科技股份有限公司 | A kind of control circuit and device of the inversion welding/cutting power supply for Width funtion input |
| CN109067192B (en) * | 2018-08-13 | 2024-02-06 | 深圳市佳士科技股份有限公司 | Control circuit and device for wide-voltage input inverter welding and cutting power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109067192A (en) | A kind of control circuit and device of the inversion welding/cutting power supply for Width funtion input | |
| CN107846151A (en) | A kind of efficient vehicle-mounted charge converter | |
| CN107733236B (en) | A kind of two-way Sofe Switch DC transfer circuit of wide scope and its control method | |
| CN110365205A (en) | A kind of high efficiency totem non-bridge PFC Rectifier | |
| CN107733245B (en) | A kind of efficient amplitude modulation perseverance high-frequency electric dust removal power circuit | |
| CN201805362U (en) | Step current limiting circuit used for aviation AC/DC conversion | |
| CN106026749B (en) | Topology variable micro- inverter and its numerical control device | |
| CN109327147A (en) | A kind of power regulation device of High Frequency Solid State induction heating power | |
| CN102437752A (en) | Grading limiting circuit for aerospace alternative-current/direct-current (AC/DC) converter | |
| CN106993348A (en) | A kind of microwave oven magnetic power control method with pull-up active clamp branch road | |
| CN207460027U (en) | Isolation type bidirectional DC/AC power supplys | |
| CN104578820B (en) | A kind of high power density AC great current generator | |
| CN205490225U (en) | Two -way ACDC circuit of high -frequency chopper isolated form | |
| CN208836009U (en) | A kind of control circuit and device of the inversion welding/cutting power supply for Width funtion input | |
| CN107645160A (en) | A kind of remote seabed HVDC electric power system | |
| CN208675121U (en) | Alternating current-direct current input adaptive switching power circuit | |
| CN104852560B (en) | The optimization method of stress equilibrium and the Switching Power Supply of this method is applicable in Switching Power Supply | |
| CN108173270B (en) | Low-voltage compensation device and method for energy-saving power distribution network | |
| CN106230282A (en) | Unity power factor isolated form AC DC changer | |
| CN208508805U (en) | Intelligent full-bridge sine voltage conversion circuit based on PFC Yu LLC resonance | |
| CN206620058U (en) | Intelligent half-bridge sine voltage change-over circuit based on PFC Yu LLC resonance | |
| CN106533192B (en) | Sine wave intelligent voltage reduction and conversion device | |
| CN108667323A (en) | Alternating current-direct current input adaptive switching power circuit | |
| CN106159965A (en) | A kind of minimal form compensates power supply | |
| CN106329699B (en) | A kind of uninterruptible power supply and its control method, control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |