CN109239451A - A kind of the input voltage test method and its circuit of Dual-power automatic switching welding machine - Google Patents
A kind of the input voltage test method and its circuit of Dual-power automatic switching welding machine Download PDFInfo
- Publication number
- CN109239451A CN109239451A CN201810975285.9A CN201810975285A CN109239451A CN 109239451 A CN109239451 A CN 109239451A CN 201810975285 A CN201810975285 A CN 201810975285A CN 109239451 A CN109239451 A CN 109239451A
- Authority
- CN
- China
- Prior art keywords
- electrically connected
- pin
- cathode
- diode
- voltage
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dc-Dc Converters (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention relates to dual power supply welding machines, disclose the input voltage test method and its circuit of a kind of Dual-power automatic switching welding machine, and method includes: acquisition input voltage；Rectification forms rectification output；Switching Power Supply is formed using switch transformer, switch transformer has an armature winding and two secondary windings；Armature winding is electrically connected with rectification output, two secondary windings form positive supplies, earthing pole and negative supply, Same Name of Ends each other between one end that one end that one end that armature winding is electrically connected with rectification output cathode, secondary windings are electrically connected with earthing pole, another secondary windings are electrically connected with negative supply；Voltage detecting line is picked out on one end that another secondary windings is electrically connected with negative electricity source circuit, uses the voltage value of the peak computational input voltage on voltage detecting line；Using the isolated buck relationship of switch transformer, the positive potential breadths voltage of Same Name of Ends is that input voltage value can be calculated than column relationship, is not necessarily to additional step-down transformer.
Description
Technical field
The present invention relates to dual power supply welding machines, more specifically, it relates to a kind of input electricity of Dual-power automatic switching welding machine
Press test method and its circuit.
Background technique
Due to the demand of actual production operation, twin voltage welding machine is favored by more and more users；Dual power supply welding machine electricity
Press the scope of application wider.
Double power-supply system welding machine in the prior art includes the supply voltage identification circuit of circuit connection, accessory power supply electricity
Road, inversion major loop, given value of current circuit and control circuit, the supply voltage identification circuit include the voltage of circuit connection
Sample circuit, voltage identification circuit and relay circuit, the auxiliary power circuit include the rectification circuit of circuit connection, standby piezoelectricity
Voltage signal is input to voltage identification circuit by road, power circuit, voltage sampling circuit sampled input voltage signal, and identification is
High pressure or low pressure, if high pressure, then relay is failure to actuate, and if low pressure, then relay is attracted, and standby volt circuit works, whole
Galvanic electricity pressure is increased to the rectified voltage of high voltage power supply.
But the voltage identification circuit of welding machine is that a step-down transformer is added at welding machine input power in the prior art
Measure the voltage value of input power, and auxiliary power circuit uses Switching Power Supply, also have step-down transformer in Switching Power Supply,
Therefore the circuit board volume in welding machine is big.
Summary of the invention
Voltage identification circuit for existing welding machine is that a step-down transformer is added at welding machine input power to survey
The voltage value of input power is measured, and auxiliary power circuit uses Switching Power Supply, also has step-down transformer in Switching Power Supply, therefore
The big technical problem of circuit board volume in welding machine, the present invention provide a kind of input voltage test of Dual-power automatic switching welding machine
Method and its circuit are not necessarily to additional step-down transformer, voltage identification circuit and accessory power supply with voltage identification circuit
Circuit shares the advantages of transformer.
To achieve the above object one, the present invention provides the following technical scheme that
A kind of input voltage test method of Dual-power automatic switching welding machine, comprising:
Obtain input voltage；
DC rectifier is carried out to input voltage and forms rectification output；
It is depressured and is formed Switching Power Supply to rectification output using switch transformer, switch transformer has an armature winding
And two secondary windings；
The armature winding of switch transformer is electrically connected through a diode with rectification output cathode, and two secondary windings, which are formed, to be had just
The accessory power supply of power supply, earthing pole and negative supply exports, wherein armature winding with rectify one end that output cathode is electrically connected,
One end that one end that secondary windings is electrically connected with earthing pole, another secondary windings are electrically connected with negative supply, between three ends
Same Name of Ends each other；
Voltage detecting line is picked out on one end that another secondary windings is electrically connected with negative electricity source circuit, using on voltage detecting line
The voltage value of input voltage is calculated according to the step-down turns ratio of switch transformer for peak value.
Through the above technical solutions, being isolation signals using switch transformer primary and secondary winding, and voltage is that decompression is closed
System, does not need secondary treatment again, utilizes primary and secondary turn ratio relationship in Switching Power Supply, when Switching Power Supply works, the positive electricity of Same Name of Ends
Position breadths voltage is that input voltage value can be calculated than column relationship, is not necessarily to additional step-down transformer, voltage identification electricity
Road and auxiliary power circuit share a transformer.
Further, voltage detecting line is picked out on one end that another described secondary windings is electrically connected with negative electricity source circuit,
Further include:
Keep the peak-to-peak value on voltage detecting line；
The voltage value of input voltage is calculated according to the step-down turns ratio of switch transformer using peak-to-peak value.
Further, one end of armature winding rectification output cathode electrical connection and the secondary windings are electrically connected with earthing pole
One end between be provided with filter capacitor.
Through the above technical solutions, filter capacitor can filter off in Switching Power Supply between armature winding and secondary windings
Clutter is exchanged, the output quality of Switching Power Supply is improved.
To achieve the above object two, the present invention provides the following technical scheme that
A kind of input voltage test circuit of Dual-power automatic switching welding machine, comprising: include:
Input voltage module, for accessing input voltage to welding machine, wherein input voltage is divided into multiple gears, the shelves of input voltage
Position is divided into low pressure shelves and high pressure shelves, and low pressure shelves are multiplication of voltage input pattern, and high pressure shelves are normal input pattern；
The input voltage module include for extraneous power electric connection one-phase power source plug, for the power supply of Switching power
Switch control unit and for input voltage carry out DC rectifier formed rectification output rectification filtering unit；
Input voltage measurement module is arranged in welding machine, for being electrically connected with input voltage module, for detecting input voltage mould
The input voltage that block provides, and generate voltage detection signal；
Input voltage measurement module includes the interior switching power supply and voltage detection unit for setting switch transformer, switch transformer
With an armature winding and two secondary windings；The armature winding and rectification output cathode of switch transformer pass through diode
Electrical connection, two secondary windings are formed, and there is the accessory power supply of positive supply, earthing pole and negative supply to export, wherein it is primary around
It organizes the one end being electrically connected with rectification output cathode, one end that secondary windings is electrically connected with earthing pole, another secondary windings and bears
One end of power electric connection, Same Name of Ends each other between three ends；
Voltage detecting line is picked out on one end that another secondary windings is electrically connected with negative electricity source circuit, exports electricity on voltage detecting line
Pressure detection signal, voltage detection signal are the peak value on voltage detecting line；
The control module of built-in A/D AD conversion unit is arranged in welding machine, connects with the input voltage measurement module by signal
It connects, the electricity that input voltage is calculated for receiving and converting the step-down turns ratio after voltage detection signal according to switch transformer
Pressure value.
Further, the input voltage measurement module further include:
Peak-to-peak value holding unit, for keeping the peak-to-peak value on voltage detecting line.
Further, the power supply switch control unit includes the switch SW1 being electrically connected with the one-phase power source plug, is opened
It closes and has been sequentially connected in series rectification filtering unit and thermistor PTC1 on SW1, rectification filtering unit includes rectifier bridge B1, rectifier bridge
The first pin of B1 is the first exchange end, and third pin is the second exchange end, and second pin is cathode output end, and the 4th pin is
Negative input is electrically connected with the resistance R13 and resistance R14 being serially connected, anode between cathode output end and negative input
The electrolytic capacitor C15 and electrolytic capacitor C16 being serially connected, electrolytic capacitor are also electrically connected between output end and negative input
The anode of C15 is electrically connected with cathode output end, and the cathode of electrolytic capacitor C15 is electrically connected with the anode of electrolytic capacitor C16, electrolysis electricity
The cathode for holding C16 is electrically connected with negative input, the tie point and electrolytic capacitor C15 between resistance R13 and resistance R14 and electrolysis
Tie point between capacitor C16 is shorted.
Further, the switching power supply includes the diode D1 and electrolytic capacitor C1, diode D1 being sequentially connected in series
Anode be electrically connected with cathode output end, diode D1 cathode is electrically connected with electrolytic capacitor C1 anode, electrolytic capacitor C1 cathode with bear
Pole input terminal is electrically connected, and is parallel with capacitor C2 on electrolytic capacitor C1；
Diode D1 cathode is electrically connected with resistance R1, capacitor C3 and switch transformer T1, and resistance R1 is located at diode D1 cathode
One end of connection is electrically connected with the first pin of switching power source chip U1, and switching power source chip U1 uses TOP246GN, switch electricity
Second pin, third pin, the 7th pin and the 8th pin of source chip U1 is electrically connected with negative input, and capacitor C3
It is electrically connected with resistance R3 in one end of diode D1 electrical connection, one end that resistance R3 is not electrically connected with capacitor C3 passes through diode D2
Be electrically connected with the 5th pin of switching power source chip U1, diode D2 cathode is electrically connected with resistance R3, diode D2 anode with open
Powered-down the 5th pin of source chip U1 is electrically connected, and is connected in parallel to resistance R4 on capacitor C3；
The first pin of switch transformer T1 is electrically connected with diode D1 cathode, and third pin is electrically connected with diode D2 anode,
4th pin is electrically connected with negative input, and the 5th pin is electrically connected with the anode of diode D3, the electrical connection of diode D3 cathode
There is the anode of electrolytic capacitor C6, the cathode of electrolytic capacitor C6 is electrically connected with negative input；6th pin is electrically connected with diode
The cathode of D6, the anode of diode D6 are negative supply pole；7th pin is earthing pole；8th pin is being electrically connected with diode D4 just
Pole and diode D5 anode, diode D4 cathode are electrically connected with diode D5 cathode and are positive supply pole；Diode D4 anode with
The resistance R6 and capacitor C9 being sequentially connected in series are electrically connected between cathode；Diode D4 cathode is being electrically connected with electrolytic capacitor C7 just
Pole, electrolytic capacitor C7 cathode are electrically connected with earthing pole；Capacitor C11 is parallel on electrolytic capacitor C7；The electrical connection of diode D6 anode
There is the cathode of electrolytic capacitor C8, electrolytic capacitor C8 anode is electrically connected with earthing pole；Capacitor C10 is parallel on electrolytic capacitor C8；Electricity
Solution capacitor C6 anode is electrically connected with photoelectrical coupler U2；It include light emitting diode and phototriode in photoelectrical coupler U2,
The A pin of photoelectrical coupler U2 is the anode of light emitting diode, and K pin is the cathode of light emitting diode, and C pin is photosensitive three pole
The collector of pipe, E pin are the emitter of phototriode；C pin is electrically connected with the anode of electrolytic capacitor C6, E pin and electricity
The 4th pin electrical connection of R5, capacitor C4 and switching power source chip U1 are hindered, one end that resistance R5 is not electrically connected with E pin is electrically connected
It is connected to the anode of electrolytic capacitor C5, electrolytic capacitor C5 cathode is electrically connected with negative input；
It is provided with armature winding between the first pin of switch transformer T1 and third pin, is set between the 4th pin and the 5th pin
It is equipped with control winding, positive supply winding is provided between the 8th pin and the 7th pin, is set between the 6th pin and the 7th pin
It is equipped with negative supply winding, positive supply winding and negative supply winding are secondary windings, the first pin, the 4th pin, the 6th pin
And the 7th Same Name of Ends each other between pin.
Further, peak-to-peak value holding unit include the diode D7 being sequentially connected in series in voltage detection unit, inductance L1 with
And resistance R11；Diode D7 anode is electrically connected with the 6th pin of switch transformer T1, and cathode and inductance L1 are electrolysed；Resistance R11
Tertiary voltage signal end is not electrically connected with the one end being electrically connected inductance L1；The tie point of inductance L1 and resistance R11 passes through capacitor
C13 is electrically connected earthing pole, and tertiary voltage signal end is electrically connected earthing pole by resistance R12, and tertiary voltage signal end also passes through electricity
Hold C14 and is electrically connected earthing pole, tertiary voltage signal end voltage sense signal.
Further, capacitor CY1 is electrically connected between the first pin and the 7th pin of switch transformer T1.
Compared with prior art, the beneficial effects of the present invention are: switching power supply and voltage detection unit, utilize switch
Switch transformer T1 primary and secondary winding in power supply unit is isolation signals, and voltage is decompression relationship, switch transformer T1
First pin, the 4th pin, the 6th pin and the 7th pin are Same Name of Ends, do not need secondary treatment again, recycle switch electricity
Primary and secondary turn ratio relationship in source unit, when switching power supply works, the breadths positive potential voltage of Same Name of Ends be than column relationship,
Such as: the first turn ratio of switch transformer T1 is 100:10, then this group of both ends pulsewidth Same Name of Ends positive potential volt threshold voltage of 10 circle is exactly just
1/10 relationship of grade coil both ends pulsewidth Same Name of Ends positive potential volt threshold voltage, and armature winding both ends pulsewidth Same Name of Ends positive potential lies prostrate
Threshold voltage, which is equal to capacitor C1 both end voltage, can be calculated input voltage value using this relationship mechanism, to detect defeated
Enter network pressure value, rectify to obtain Same Name of Ends positive potential signal by diode D7, passes through inductance L1, capacitor C13, capacitor C14, electricity
R11 is hindered, the peak-to-peak value holding circuit method of resistance R12 composition obtains detectable voltage signals, feeds back to tertiary voltage signal end,
Without additional step-down transformer, voltage identification circuit and auxiliary power circuit share a transformer.
Detailed description of the invention
Fig. 1 is the method flow diagram of the embodiment of the present invention one；
Fig. 2 is the entire block diagram of the embodiment of the present invention two；
Fig. 3 is the circuit diagram of two input voltage module of the embodiment of the present invention；
Fig. 4 is the circuit diagram of two input voltage measurement module of the embodiment of the present invention；
Fig. 5 is the block diagram of two welding machine of the embodiment of the present invention.
Appended drawing reference: 100, input voltage module；110, one-phase power source plug；120, power supply switch control unit；130,
Rectification filtering unit；200, input voltage measurement module；210, switching power supply；220, voltage detection unit；300, it controls
Module；310, delay unit；320, lock cell；330, compare Alarm Unit；400, gear module is inputted.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
Embodiment one
A kind of input voltage test method of Dual-power automatic switching welding machine, as shown in Figure 1, comprising:
Input voltage is obtained, input voltage is accessed to welding machine, welding machine is allowed to be switched on, and maintain the setting duration, wherein input electricity
Pressure is divided into multiple input voltage gears；For example, the gear of input voltage is divided into 120Vac grades and 240Vac grades, 120Vac grades is again
Input pattern is pressed, 240Vac grades are normal input pattern, set voltage range as 90Vac~135Vac.
DC rectifier is carried out to input voltage and forms rectification output.
It reuses switch transformer and is depressured and is formed Switching Power Supply to rectification output, switch transformer has at the beginning of one
Grade winding and two secondary windings.
The armature winding of switch transformer is electrically connected through a diode with rectification output cathode, and two secondary windings form tool
Have positive supply, earthing pole and negative supply accessory power supply export, wherein armature winding with rectify output cathode be electrically connected one
One end that end, one end for being electrically connected with earthing pole of secondary windings, another secondary windings are electrically connected with negative supply, three ends it
Between Same Name of Ends each other；Armature winding rectifies one end that output cathode the is electrically connected and secondary windings is electrically connected with earthing pole one
Filter capacitor is provided between end.Filter capacitor can filter off exchanging in Switching Power Supply between armature winding and secondary windings
Clutter improves the output quality of Switching Power Supply.
Voltage detecting line is picked out on one end that another secondary windings is electrically connected with negative electricity source circuit, keeps voltage detecting line
On peak-to-peak value, input voltage is calculated according to the step-down turns ratio of switch transformer using the peak-to-peak value on voltage detecting line
Voltage value.
Welding machine is locked to times pressure condition of input voltage, for example, pressure condition is that welding machine will input electricity using voltage-multiplying circuit again
The voltage value of pressure doubles.
The working principle of the input voltage test method of Dual-power automatic switching welding machine are as follows: welding machine uses Switching Power Supply, to
Welding machine accesses input voltage, is isolation signals using switch transformer primary and secondary winding, and voltage is decompression relationship, is not needed
Secondary treatment again utilizes primary and secondary turn ratio relationship in Switching Power Supply, when Switching Power Supply works, the breadths positive potential voltage of Same Name of Ends
For input voltage value can be calculated than column relationship, it is not necessarily to additional step-down transformer, voltage identification circuit and auxiliary electricity
Source circuit shares a transformer.
Embodiment two
A kind of input voltage test circuit of Dual-power automatic switching welding machine, as shown in Figure 2 and Figure 3, comprising:
Input voltage module 100, for accessing input voltage to welding machine, wherein input voltage is divided into multiple gears；Input voltage
Gear be divided into 120Vac grades and 240Vac grades, 120Vac grades are multiplication of voltage input pattern, and 240Vac grade are normal input pattern.
Input voltage module 100 includes one-phase power source plug 110, power supply switch control unit 120 and rectifying and wave-filtering list
Member 130.
Power supply switch control unit 120 includes the switch SW1 being electrically connected with one-phase power source plug 110, on switch SW1 successively
It is in series with rectification filtering unit 130 and thermistor PTC1.Rectification filtering unit 130 includes rectifier bridge B1, rectifier bridge B1's
First pin is the first exchange end, and third pin is the second exchange end, and second pin is cathode output end, and the 4th pin is cathode
Input terminal is electrically connected with the resistance R13 and resistance R14 being serially connected, anode output between cathode output end and negative input
The electrolytic capacitor C15 and electrolytic capacitor C16 being serially connected also are electrically connected between end and negative input, electrolytic capacitor C15's
Anode is electrically connected with cathode output end, and the cathode of electrolytic capacitor C15 is electrically connected with the anode of electrolytic capacitor C16, electrolytic capacitor C16
Cathode be electrically connected with negative input.Tie point and electrolytic capacitor C15 and electrolytic capacitor between resistance R13 and resistance R14
Tie point between C16 is shorted.
Power supply switch control unit 120 further includes the first electromagnetic switch DK1 and the second electromagnetic switch DK2, and the first electromagnetism is opened
DK1 is closed as the second electromagnetic switch DK2.It is provided with solenoid winding DL and coil switch LK in first electromagnetic switch DK1,
First the first pin of electromagnetic switch DK1 and second pin are respectively the both ends of solenoid winding DL, third pin and the 4th
Crimping is respectively the both ends of coil switch LK.In the state of being not powered on, coil switch LK is disconnected first electromagnetic switch DK1.
Tie point between the third pin and resistance R13 and resistance R14 of first electromagnetic switch DK1 is electrically connected, and the 4th draws
Foot is electrically connected with the first pin of rectifier bridge B1, is parallel with two between the first pin and second pin of the first electromagnetic switch DK1
Pole pipe D9.The anode of diode D9 is electrically connected with the first pin and is electrically connected with the first power supply signal end, the cathode of diode D9
It is electrically connected with second pin and is electrically connected with positive pole.
The third pin and the 4th pins in parallel of second electromagnetic switch DK2 at the both ends thermistor PTC1, open by the second electromagnetism
It closes and is parallel with diode D8 between the first pin and second pin of DK1.Diode D8 anode be electrically connected with the first pin and
It is electrically connected with second source signal end, the cathode of diode D8 is electrically connected with second pin and is electrically connected with positive electricity source electrode.
When the first electromagnetic switch DK1 be powered when, the voltage difference between cathode output end and cathode output end is double, i.e., into
Enter a times pressure condition.
Input voltage measurement module 200 is arranged in welding machine, for being electrically connected with input voltage module 100, for detecting
The input voltage that input voltage module 100 provides, and generate voltage detection signal.
As shown in figure 4, input voltage measurement module 200 includes switching power supply 210 and voltage detection unit 220.
Switching power supply 210 includes the diode D1 and electrolytic capacitor C1 being sequentially connected in series, diode D1 anode and anode
Output end electrical connection, diode D1 cathode are electrically connected with electrolytic capacitor C1 anode, electrolytic capacitor C1 cathode and negative input electricity
Connection.Capacitor C2 is parallel on electrolytic capacitor C1.Diode D1 cathode is electrically connected with resistance R1, capacitor C3 and switch transformer
T1.One end that resistance R1 is located at the connection of diode D1 cathode is electrically connected with the first pin of switching power source chip U1.Switching Power Supply
TOP246GN can be used in chip U1.The second pin of switching power source chip U1, third pin, the 7th pin and the 8th pin are equal
It is electrically connected with negative input.One end that capacitor C3 is located at diode D1 electrical connection is electrically connected with resistance R3, resistance R3 not with electricity
The one end for holding C3 electrical connection is electrically connected by diode D2 with the 5th pin of switching power source chip U1, diode D2 cathode and electricity
R3 electrical connection is hindered, diode D2 anode is electrically connected with the 5th pin of switching power source chip U1.Resistance is connected in parallel on capacitor C3
R4。
The first pin of switch transformer T1 is electrically connected with diode D1 cathode, and third pin is electrically connected with diode D2 anode
It connects, the 4th pin is electrically connected with negative input, and the 5th pin is electrically connected with the anode of diode D3, and diode D3 cathode is electrically connected
It is connected to the anode of electrolytic capacitor C6, the cathode of electrolytic capacitor C6 is electrically connected with negative input.6th pin is electrically connected with two poles
The cathode of pipe D6, the anode of diode D6 are negative supply pole.7th pin is earthing pole.8th pin is electrically connected with diode D4
Anode and diode D5 anode, diode D4 cathode are electrically connected with diode D5 cathode and are positive supply pole.Diode D4 anode
The resistance R6 and capacitor C9 being sequentially connected in series are electrically connected between cathode.Diode D4 cathode is being electrically connected with electrolytic capacitor C7 just
Pole, electrolytic capacitor C7 cathode are electrically connected with earthing pole.Capacitor C11 is parallel on electrolytic capacitor C7.The electrical connection of diode D6 anode
There is the cathode of electrolytic capacitor C8, electrolytic capacitor C8 anode is electrically connected with earthing pole.Capacitor C10 is parallel on electrolytic capacitor C8.It opens
It closes and is electrically connected with capacitor CY1 between the first pin and the 7th pin of transformer T1.
Electrolytic capacitor C6 anode is electrically connected with photoelectrical coupler U2.It include light emitting diode and light in photoelectrical coupler U2
Quick triode, the A pin of photoelectrical coupler U2 are the anode of light emitting diode, and K pin is the cathode of light emitting diode, C pin
For the collector of phototriode, E pin is the emitter of phototriode.C pin is electrically connected with the anode of electrolytic capacitor C6,
E pin is electrically connected with the 4th pin of resistance R5, capacitor C4 and switching power source chip U1, and resistance R5 is not electrically connected with E pin
One end be electrically connected with the anode of electrolytic capacitor C5, electrolytic capacitor C5 cathode is electrically connected with negative input.
Voltage detection unit 220 includes diode D7, inductance L1 and the resistance R11 being sequentially connected in series.Diode D7 anode
It is electrically connected with the 6th pin of switch transformer T1, cathode and inductance L1 are electrolysed.One end that resistance R11 is not electrically connected with inductance L1
It is electrically connected with tertiary voltage signal end.Inductance L1 is electrically connected earthing pole, third electricity by capacitor C13 with the tie point of resistance R11
Signal end is pressed to be electrically connected earthing pole by resistance R12, tertiary voltage signal end also passes through capacitor C14 electrical connection earthing pole.First
Power supply signal end, second source signal end, tertiary voltage signal end and the 4th ground terminal form terminal block CN1.
Wherein, armature winding, the 4th pin and the 5th are provided between the first pin of switch transformer T1 and third pin
It is provided with control winding between pin, positive supply winding, the 6th pin and the 7th are provided between the 8th pin and the 7th pin
Negative supply winding is provided between pin, it is of the same name each other between the first pin, the 4th pin, the 6th pin and the 7th pin
End.
By switching power supply 210 and voltage detection unit 220, the switch transformation in switching power supply 210 is utilized
Device T1 primary and secondary winding is isolation signals, and voltage is decompression relationship, the first pin of switch transformer T1, the 4th pin, the
Six pins and the 7th pin are Same Name of Ends, do not need secondary treatment again, recycle the primary and secondary turn ratio in switching power supply 210
Relationship, when switching power supply 210 works, the breadths voltage of Same Name of Ends is than column relationship, such as: the first turn ratio of switch transformer T1
For 100:10, then this group of both ends pulsewidth Same Name of Ends positive potential volt threshold voltage of 10 circle is exactly primary coil both ends pulsewidth Same Name of Ends positive electricity
1/10 relationship of position volt threshold voltage, and pulsewidth Same Name of Ends positive potential volt threshold voltage in armature winding both ends is equal to the both ends capacitor C1 electricity
Pressure, using this relationship mechanism, can be calculated input voltage value, to detect input network pressure value.Pass through diode D7
Rectification obtains Same Name of Ends positive potential signal, is passing through inductance L1, capacitor C13, capacitor C14, resistance R11, the peak of resistance R12 composition
Peak holding circuit obtains detectable voltage signals, feeds back to tertiary voltage signal end.
Control module 300 with delay unit 310 is arranged in welding machine, and control module 300 is to have switch power module
STMicw Electronics STM32 series monolithic and its common peripheral operating circuit can be selected in the one-chip computer module of power supply, single-chip microcontroller, or
Person's Freescale K60 series monolithic and its common peripheral operating circuit, delay unit 310 is using timing built-in in single-chip microcontroller
Device module or clock module, to export the pulse of persistently setting duration length.When can store setting in delay unit 310
Between, and issued and the associated time signal of setting time to input voltage measurement module 200.
Four pins in control module 300 are connect with terminal block CN1 signal.Four pin packets in control module 300
Include two control pins, a built-in A/D AD conversion unit input pin, a grounding pin.Wherein, two control pins
It is electrically connected respectively with the first power supply signal end, second source signal end, the original levels state for controlling pin is high level, control
A/D AD conversion unit input pin is electrically connected with tertiary voltage signal end built in module 300, grounding pin and the 4th ground terminal
Electrical connection.Built-in A/D AD conversion unit input pin reads the voltage analog on tertiary voltage signal end, and is converted to number
Word amount, the corresponding voltage value for representing input voltage module 100 of digital quantity.300 innernal CPU of control module by digital quantity with set
Voltage value be compared, set voltage range as 90Vac~135Vac.Control module 300 compares the voltage detecting letter of receiving
After number in the setting voltage range set in advance, then input voltage module 100 is in multiplication of voltage input pattern, generates and exports
Voltage signal, otherwise input voltage module 100 is in normal input pattern, does not export voltage signal.
Times die block is arranged in welding machine, be electrically connected with input voltage module 100, with the letter of input voltage measurement module 200
Number connection, receives the voltage that doubles to output voltage values after input voltage multiplication of voltage after voltage signal.At input voltage module 100
When multiplication of voltage input pattern, the control pin of control module 300 makes the first power supply signal end become low level, opens the first electromagnetism
DK1 conducting is closed, so that rectification filtering unit 130 be made to become a times die block.Make the electricity between cathode output end and negative input
Pressure difference is double.
Input gear module 400, be arranged on welding machine, connect with 300 signal of control module, for generate and to control mould
Block 300 sends the signal for representing input pattern gear, and input pattern gear includes normal input pattern and multiplication of voltage input pattern, weldering
Machine have with the one-to-one output mode gear of input voltage gear, output mode gear includes NORMAL output mode and multiplication of voltage
Output mode, NORMAL output mode is corresponding with normal input pattern, and multiplication of voltage output mode is corresponding with multiplication of voltage input pattern.Input shelves
Position module 400 can there are two the knobs of gear for tool, or are made of two interlocking buttons.
It further include having Alarm Unit 330 compared with of lock cell 320 in control module 300.
For locking the voltage signal that control module 300 is sent to die block again, lock cell 320 is lock cell 320
Allow control module 300 that the control pin being electrically connected with second source signal end is kept to be kept for low level single-chip microcontroller pin assignment generation
Code.
Compare Alarm Unit 330 using warning lamp perhaps liquid crystal display panel liquid crystal display panel can for LCD1602 or
LCD12864, the warning lamp pin additional with control module 300 are electrically connected, and control module 300 can control the light on and off shape of warning lamp
State is to carry out warning note；If liquid crystal display panel, control module 300 is by the timing of liquid crystal display panel to show on liquid crystal display panel
Character is to carry out warning note.If control module 300 judges welding machine present input voltage gear and its current output mode gear
For corresponding relationship, then keep the working condition of welding machine constant；If judging welding machine present input voltage gear and its current output mould
Formula gear is not corresponding relationship, then carries out warning note.
One-phase power source plug 110 accesses single phase poaer supply, and closure switch SW1 input voltage module 100 works, thermistor
PTC1 is that electrolytic capacitor C15 and electrolytic capacitor C16 charges, and is powered on switch power module and control module 300, controls
It, which controls pin, after molding block 300 works is connected the second electromagnetic switch DK2, and the second electromagnetic switch DK2 makes thermistor PTC1
Short circuit makes the voltage on electrode input end keep stablizing.At the reading of control module 300 detectable voltage signals, comparison operation
Reason, obtains input voltage value, to control power supply switch control unit 120, realizes Dual-power automatic switching.
In conjunction with Fig. 5, common inverter circuit frequency conversion in inverter type welder, output rectification are connected by rectification filtering unit 130
Circuit, while control module 300 makes according to corresponding power input value to control the PWM pulse-width signal of inverter circuit needs
Output electric current controlled, to limit input power, prevent because input current is excessive, caused by input cable line fever,
Fire risk and machine breakdown, play the role of protection, and panel instruction is shown in relevant parameter information when different input voltages.
Inverter circuit frequency conversion, output rectification circuit and the control module 300 using single-chip microcontroller export PWM pulse-width signal and control
Output electric current is all made of conventional means disclosed in the prior art, and and will not be described here in detail.It is all in addition to electrolytic capacitor herein
The terminal of capacitor is regardless of positive and negative anodes.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of input voltage test method of Dual-power automatic switching welding machine characterized by comprising
Obtain input voltage；
DC rectifier is carried out to input voltage and forms rectification output；
It is depressured and is formed Switching Power Supply to rectification output using switch transformer, switch transformer has an armature winding
And two secondary windings；
The armature winding of switch transformer is electrically connected through a diode with rectification output cathode, and two secondary windings, which are formed, to be had just
The accessory power supply of power supply, earthing pole and negative supply exports, wherein armature winding with rectify one end that output cathode is electrically connected,
One end that one end that secondary windings is electrically connected with earthing pole, another secondary windings are electrically connected with negative supply, between three ends
Same Name of Ends each other；
Voltage detecting line is picked out on one end that another secondary windings is electrically connected with negative electricity source circuit, using on voltage detecting line
The voltage value of input voltage is calculated according to the step-down turns ratio of switch transformer for peak value.
2. the method according to claim 1, wherein another described secondary windings is electrically connected with negative electricity source circuit
One end on pick out voltage detecting line, further includes:
Keep the peak-to-peak value on voltage detecting line；
The voltage value of input voltage is calculated according to the step-down turns ratio of switch transformer using peak-to-peak value.
3. the method according to claim 1, wherein one end and the institute of armature winding rectification output cathode electrical connection
It states and is provided with filter capacitor between one end that secondary windings is electrically connected with earthing pole.
4. a kind of input voltage of Dual-power automatic switching welding machine tests circuit characterized by comprising
Input voltage module (100), for accessing input voltage to welding machine, wherein input voltage is divided into multiple gears, input electricity
The gear of pressure is divided into low pressure shelves and high pressure shelves, and low pressure shelves are multiplication of voltage input pattern, and high pressure shelves are normal input pattern；
The input voltage module (100) include for extraneous power electric connection one-phase power source plug (110), for switching
The power supply switch control unit (120) of power supply and for input voltage carry out DC rectifier formed rectification output rectification filter
Wave unit (130)；
Input voltage measurement module (200) is arranged in welding machine, for being electrically connected with input voltage module (100), for detecting
The input voltage that input voltage module (100) provides, and generate voltage detection signal；
Input voltage measurement module (200) includes the interior switching power supply (210) and voltage detection unit for setting switch transformer
(220), switch transformer has an armature winding and two secondary windings；The armature winding of switch transformer and rectification are defeated
Anode is electrically connected through a diode out, and two secondary windings form the accessory power supply with positive supply, earthing pole and negative supply
Output, wherein one end that armature winding is electrically connected with one end for being electrically connected of rectification output cathode, secondary windings with earthing pole, separately
One end that one secondary windings is electrically connected with negative supply, Same Name of Ends each other between three ends；
Voltage detecting line is picked out on one end that another secondary windings is electrically connected with negative electricity source circuit, exports electricity on voltage detecting line
Pressure detection signal, voltage detection signal are the peak value on voltage detecting line；The control module of built-in A/D AD conversion unit
(300), it is arranged in welding machine, is connect with input voltage measurement module (200) signal, for receiving and converting voltage detecting
The voltage value of input voltage is calculated in step-down turns ratio after signal according to switch transformer.
5. circuit according to claim 4, which is characterized in that the input voltage measurement module (200) further include:
Peak-to-peak value holding unit, for keeping the peak-to-peak value on voltage detecting line.
6. circuit according to claim 5, which is characterized in that the power supply switch control unit (120) include with it is described
Rectification filtering unit (130) and temperature-sensitive have been sequentially connected in series on the switch SW1 of one-phase power source plug (110) electrical connection, switch SW1
Resistance PTC1, rectification filtering unit (130) include rectifier bridge B1, and the first pin of rectifier bridge B1 is the first exchange end, and third is drawn
Foot is the second exchange end, and second pin is cathode output end, and the 4th pin is negative input, and cathode output end and cathode input
It is electrically connected with the resistance R13 and resistance R14 being serially connected between end, is also electrically connected between cathode output end and negative input
The anode of the electrolytic capacitor C15 and electrolytic capacitor C16 being serially connected, electrolytic capacitor C15 are electrically connected with cathode output end, electrolysis electricity
The cathode for holding C15 is electrically connected with the anode of electrolytic capacitor C16, and the cathode of electrolytic capacitor C16 is electrically connected with negative input, resistance
Tie point between tie point between R13 and resistance R14 and electrolytic capacitor C15 and electrolytic capacitor C16 is shorted.
7. circuit according to claim 6, which is characterized in that the switching power supply (210) includes being sequentially connected in series
Diode D1 and electrolytic capacitor C1, diode D1 anode are electrically connected with cathode output end, diode D1 cathode and electrolytic capacitor C1
Anode electrical connection, electrolytic capacitor C1 cathode are electrically connected with negative input, and capacitor C2 is parallel on electrolytic capacitor C1；
Diode D1 cathode is electrically connected with resistance R1, capacitor C3 and switch transformer T1, and resistance R1 is located at diode D1 cathode
One end of connection is electrically connected with the first pin of switching power source chip U1, and switching power source chip U1 uses TOP246GN, switch electricity
Second pin, third pin, the 7th pin and the 8th pin of source chip U1 is electrically connected with negative input, and capacitor C3
It is electrically connected with resistance R3 in one end of diode D1 electrical connection, one end that resistance R3 is not electrically connected with capacitor C3 passes through diode D2
Be electrically connected with the 5th pin of switching power source chip U1, diode D2 cathode is electrically connected with resistance R3, diode D2 anode with open
Powered-down the 5th pin of source chip U1 is electrically connected, and is connected in parallel to resistance R4 on capacitor C3；
The first pin of switch transformer T1 is electrically connected with diode D1 cathode, and third pin is electrically connected with diode D2 anode,
4th pin is electrically connected with negative input, and the 5th pin is electrically connected with the anode of diode D3, the electrical connection of diode D3 cathode
There is the anode of electrolytic capacitor C6, the cathode of electrolytic capacitor C6 is electrically connected with negative input；6th pin is electrically connected with diode
The cathode of D6, the anode of diode D6 are negative supply pole；7th pin is earthing pole；8th pin is being electrically connected with diode D4 just
Pole and diode D5 anode, diode D4 cathode are electrically connected with diode D5 cathode and are positive supply pole；Diode D4 anode with
The resistance R6 and capacitor C9 being sequentially connected in series are electrically connected between cathode；Diode D4 cathode is being electrically connected with electrolytic capacitor C7 just
Pole, electrolytic capacitor C7 cathode are electrically connected with earthing pole；Capacitor C11 is parallel on electrolytic capacitor C7；The electrical connection of diode D6 anode
There is the cathode of electrolytic capacitor C8, electrolytic capacitor C8 anode is electrically connected with earthing pole；Capacitor C10 is parallel on electrolytic capacitor C8；Electricity
Solution capacitor C6 anode is electrically connected with photoelectrical coupler U2；It include light emitting diode and phototriode in photoelectrical coupler U2,
The A pin of photoelectrical coupler U2 is the anode of light emitting diode, and K pin is the cathode of light emitting diode, and C pin is photosensitive three pole
The collector of pipe, E pin are the emitter of phototriode；C pin is electrically connected with the anode of electrolytic capacitor C6, E pin and electricity
The 4th pin electrical connection of R5, capacitor C4 and switching power source chip U1 are hindered, one end that resistance R5 is not electrically connected with E pin is electrically connected
It is connected to the anode of electrolytic capacitor C5, electrolytic capacitor C5 cathode is electrically connected with negative input；
It is provided with armature winding between the first pin of switch transformer T1 and third pin, is set between the 4th pin and the 5th pin
It is equipped with control winding, positive supply winding is provided between the 8th pin and the 7th pin, is set between the 6th pin and the 7th pin
It is equipped with negative supply winding, positive supply winding and negative supply winding are secondary windings, the first pin, the 4th pin, the 6th pin
And the 7th Same Name of Ends each other between pin.
8. circuit according to claim 7, which is characterized in that peak-to-peak value holding unit includes voltage detection unit (220)
In the diode D7, inductance L1 and the resistance R11 that are sequentially connected in series；The 6th pin of diode D7 anode and switch transformer T1 electricity
Connection, cathode and inductance L1 are electrolysed；Resistance R11 is not electrically connected with tertiary voltage signal end with the one end being electrically connected inductance L1；Electricity
Feel L1 and earthing pole is electrically connected by capacitor C13 with the tie point of resistance R11, tertiary voltage signal end is electrically connected by resistance R12
Earthing pole, tertiary voltage signal end also pass through capacitor C14 electrical connection earthing pole, tertiary voltage signal end output voltage detection letter
Number.
9. circuit according to claim 8, which is characterized in that between the first pin and the 7th pin of switch transformer T1
It is electrically connected with capacitor CY1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810975285.9A CN109239451B (en) | 2018-08-24 | 2018-08-24 | Input voltage test method and circuit of dual-power automatic switching welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810975285.9A CN109239451B (en) | 2018-08-24 | 2018-08-24 | Input voltage test method and circuit of dual-power automatic switching welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109239451A true CN109239451A (en) | 2019-01-18 |
| CN109239451B CN109239451B (en) | 2020-09-04 |
Family
ID=65067975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810975285.9A Active CN109239451B (en) | 2018-08-24 | 2018-08-24 | Input voltage test method and circuit of dual-power automatic switching welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109239451B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202817892U (en) * | 2012-10-11 | 2013-03-20 | 浙江颐顿机电有限公司 | Double power switching circuit of inverter welding machine |
| CN103616548A (en) * | 2013-11-26 | 2014-03-05 | 上海通用重工集团有限公司 | Inverter welder output current detecting circuit and detecting method based on direct current signals |
| US20170072498A1 (en) * | 2013-01-31 | 2017-03-16 | Illinois Tool Works Inc. | Waveform compensation systems and methods for secondary weld component response |
| CN206992945U (en) * | 2017-07-07 | 2018-02-09 | 吴忠市中心电焊机有限公司 | The anti-fluctuation locking device of dual power supply welding machine input voltage measurement |
-
2018
- 2018-08-24 CN CN201810975285.9A patent/CN109239451B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202817892U (en) * | 2012-10-11 | 2013-03-20 | 浙江颐顿机电有限公司 | Double power switching circuit of inverter welding machine |
| US20170072498A1 (en) * | 2013-01-31 | 2017-03-16 | Illinois Tool Works Inc. | Waveform compensation systems and methods for secondary weld component response |
| CN103616548A (en) * | 2013-11-26 | 2014-03-05 | 上海通用重工集团有限公司 | Inverter welder output current detecting circuit and detecting method based on direct current signals |
| CN206992945U (en) * | 2017-07-07 | 2018-02-09 | 吴忠市中心电焊机有限公司 | The anti-fluctuation locking device of dual power supply welding machine input voltage measurement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109239451B (en) | 2020-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103311984A (en) | Alternating current charging post for electric automobile | |
| CN102890170B (en) | Three-phase electric energy meter false wiring automated conversion system | |
| CN102901883B (en) | Trigger test device for thyristor unit of converter valve | |
| CN111007313A (en) | Electricity stealing identification circuit and method and electricity meter | |
| CN110346671A (en) | Failure based reminding method, device and the electrical equipment of electrical equipment | |
| CN207719887U (en) | Electric tool for electric installation and with this for electric installation | |
| CN107310418B (en) | Integral type electricity phenotype fills electric pile | |
| CN207173323U (en) | Integral type ammeter type charging pile | |
| CN109239451A (en) | A kind of the input voltage test method and its circuit of Dual-power automatic switching welding machine | |
| CN208937942U (en) | Time switching device and timing system | |
| CN110492558A (en) | A kind of energy storage charge and discharge control module | |
| CN216670111U (en) | Multi-loop AC/DC integrated wide area measurement terminal | |
| CN109755819A (en) | A kind of intelligent socket hardware circuit based on ONENET cloud platform | |
| CN213069001U (en) | Alternating current transmitter | |
| CN207753477U (en) | A kind of portable intelligent charging box | |
| CN102175903A (en) | Passive isolated direct current (DC) voltage detection device for urban railway vehicle | |
| CN106443227A (en) | Detection device and method of detecting electrical parameters in driving card loop of nuclear class equipment | |
| CN217787226U (en) | Isolated alternating voltage detection circuit | |
| CN219247520U (en) | Electric heater device based on battery power supply | |
| CN216927061U (en) | Electricity testing device and system based on wireless carrier power supply communication | |
| CN216747972U (en) | Aging detection system for circuit control board of induction cooker | |
| CN215990575U (en) | Dual-voltage output power supply circuit for charging pile | |
| CN214755579U (en) | Multifunctional integrated household energy storage power supply circuit | |
| CN216134285U (en) | Charger capable of detecting power consumption | |
| CN207184073U (en) | Induction type energy-saving DC electric source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |