CN204122901U - The secondary inverting control circuit of inverter type welder - Google Patents
The secondary inverting control circuit of inverter type welder Download PDFInfo
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- CN204122901U CN204122901U CN201420568966.0U CN201420568966U CN204122901U CN 204122901 U CN204122901 U CN 204122901U CN 201420568966 U CN201420568966 U CN 201420568966U CN 204122901 U CN204122901 U CN 204122901U
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Abstract
The utility model discloses a kind of secondary inverting control circuit of inverter type welder, comprising the sine wave generator circuit for generating sine wave signal, for providing the first current rectifying and wave filtering circuit of given value of current signal to the main power control plate in inverter type welder and for providing the secondary inverting drive circuit of secondary inverting drive singal to the main power control plate in inverter type welder.Given value of current signal and secondary inverting drive singal are Synchronization Control, effectively improving the IGBT module duty of secondary inverting, guaranteeing IGBT module when turning on and off close to zero current.Be zero or close to zero because inverter type welder is operated in the instantaneous given electric current of zero passage, so it is zero or almost nil that IGBT module turns on and off instantaneous heating, avoids overcurrent damage device and produce the noise of high-decibel.The utility model can improve inverter type welder welding performance, improve its reliability effectively reduce noise.
Description
Technical field
The utility model relates to the secondary inverting technical field of inverter type welder, particularly relates to a kind of secondary inverting control circuit of inverter type welder.
Background technology
Welding machine is the visual plant in production and processing field, across multiple technical fields such as welding procedure, electric arc and power electronics.Increasingly mature along with inverted gas protective welder power technology, due to its little, lightweight relative to traditional welding machine volume and energy-conservation etc. plurality of advantages, its scope of application is also more and more wider.Secondary inverter circuit in inverter type welder is when output AC voltage, due to not through Synchronization Control or control effects bad, cause inverter type welder the instantaneous operating current of zero passage and operating voltage excessive, IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) to turn on and off instantaneous caloric value large for module, easy overcurrent damage device.Meanwhile, inverter type welder in use produces the noise of high-decibel, also have impact on the healthy of welder.
Utility model content
Based on this, be necessary, for the excessive problem of the zero passage transient current of secondary inverter circuit in inverter type welder, voltage, to provide a kind of secondary inverting control circuit of inverter type welder.
Its technical scheme is as follows.
A secondary inverting control circuit for inverter type welder, comprises the sine wave generator circuit for generating sine wave signal, for providing the first current rectifying and wave filtering circuit of given value of current signal to the main power control plate in inverter type welder and for providing the secondary inverting drive circuit of secondary inverting drive singal to the main power control plate in inverter type welder;
Described given value of current signal is the fluctuating signal formed after described first current rectifying and wave filtering circuit carries out full-wave rectification to described sine wave signal, described secondary inverting drive singal to comprise on secondary inverting pipe drive singal under pipe drive singal and secondary inverting, on described secondary inverting, under pipe drive singal and described secondary inverting, pipe drive singal is described secondary inverting drive circuit processes rear formation pulse signal to described sine wave signal, and on described secondary inverting, under pipe drive singal and described secondary inverting, the phase place of pipe drive singal is contrary;
Described sine wave generator circuit connects described first current rectifying and wave filtering circuit and described secondary inverting drive circuit, and described first current rectifying and wave filtering circuit connects described secondary inverting drive circuit.
Wherein in an embodiment, described sine wave generator circuit comprises ICL8038 chip, the first dc source, the second dc source, the first electric capacity, the second electric capacity, the 3rd electric capacity, the second resistance, the 3rd resistance, the 4th resistance and the 5th resistance;
Described first dc source connects one end of described second electric capacity respectively, one end of described second resistance, one end of described 3rd resistance, one end of described 5th resistance and the 6th pin of described ICL8038 chip, the other end ground connection of described second electric capacity, the other end of described second resistance connects the 4th pin of described ICL8038 chip, the other end of described 3rd resistance connects the 5th pin of described ICL8038 chip, the other end of described 5th resistance connects the 9th pin of described ICL8038 chip, described second dc source connects one end of described 3rd electric capacity respectively, one end of described first electric capacity, one end of described 4th resistance and the 11 pin of described ICL8038 chip, the other end ground connection of described 3rd electric capacity, the other end of described first electric capacity connects the tenth pin of described ICL8038 chip, the other end of described 4th resistance connects the 12 pin of described ICL8038 chip, the crus secunda of described ICL8038 chip connects described first current rectifying and wave filtering circuit and described secondary inverting drive circuit.
Wherein in an embodiment, the 7th pin of described ICL8038 chip is connected with octal.
Wherein in an embodiment, described first dc source is positive 15V, and described second dc source is negative 15V.
Wherein in an embodiment, described first current rectifying and wave filtering circuit comprises the 3rd dc source, the 4th dc source, the first variable resistor, the first Zener diode, the first diode, the second diode, the 5th electric capacity, the 6th electric capacity, the first resistance, the 6th resistance, the 8th resistance, the 9th resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the first operational amplifier, the second operational amplifier and the 3rd operational amplifier;
One end of described first resistance connects one end of described 6th resistance, and connect described sine wave generator circuit and described secondary inverting drive circuit simultaneously, the other end of described 6th resistance connects the inverting input of described second operational amplifier, one end of described 9th resistance and the negative pole of described first diode, the positive pole of described first diode connects the output of described second operational amplifier and the negative pole of described second diode, the positive pole of described second diode connects the other end of described 9th resistance and one end of described 11 resistance, the in-phase input end of described second operational amplifier connects one end of described 8th resistance, the other end ground connection of described 8th resistance, the other end of described 11 resistance connects the other end of described first resistance, one end of described 13 resistance and the inverting input of described first operational amplifier, the in-phase input end of described first operational amplifier connects one end of described 12 resistance, the other end ground connection of described 12 resistance, the negative power end of described first operational amplifier connects one end of described 4th dc source and described 5th electric capacity, the other end ground connection of described 5th electric capacity, the positive power source terminal of described first operational amplifier connects one end of described 3rd dc source and described 6th electric capacity, the other end ground connection of described 6th electric capacity, the output of described first operational amplifier connects the other end of described 13 resistance and one end of described 14 resistance, the other end of described 14 resistance connects the negative pole of described first Zener diode and described first variable-resistance first stiff end, the plus earth of described first Zener diode, described first variable-resistance second stiff end connects one end of described 15 resistance, the other end ground connection of described 15 resistance, described first variable-resistance sliding end connects the in-phase input end of described 3rd operational amplifier, the inverting input of described 3rd operational amplifier connects the output of described 3rd operational amplifier, the output of described 3rd operational amplifier provides given value of current signal to the main power control plate in inverter type welder.
Wherein in an embodiment, described first operational amplifier, described second operational amplifier and described 3rd operational amplifier are integrated in LM324N.
Wherein in an embodiment, described 3rd dc source is positive 15V, and described 4th dc source is negative 15V.
Wherein in an embodiment, described first diode and described second diode are IN4148 type diode.
Wherein in an embodiment, described secondary inverting drive circuit comprises the 5th dc source, the 4th electric capacity, the 7th resistance, the tenth resistance, four-operational amplifier, the 5th operational amplifier and 4011 type NAND gate circuits;
One end of described 7th resistance connects described sine wave generator circuit and described first current rectifying and wave filtering circuit, the other end of described 7th resistance connects the in-phase input end of described four-operational amplifier, the inverting input of described four-operational amplifier and negative power end ground connection, the positive power source terminal of described four-operational amplifier connects one end of described 5th dc source and described 4th electric capacity, the other end ground connection of described 4th electric capacity, the output of described four-operational amplifier connects one end of described tenth resistance, the other end of described tenth resistance connects the in-phase input end of described 5th operational amplifier, the inverting input of described 5th operational amplifier connects the output of described 5th operational amplifier, the output of described 5th operational amplifier connects the first pin of described 4011 type NAND gate circuits, crus secunda, 12 pin and the tenth tripod, 14 pin of described 4011 type NAND gate circuits connects described 5th dc source, 7th pin ground connection, 11 pin connects described tripod, the output of described 5th operational amplifier and the tripod of described 4011 type NAND gate circuits provide secondary inverting drive singal to the main power control plate in inverter type welder.
Wherein in an embodiment, described four-operational amplifier and described 5th operational amplifier are integrated in LM358.
Below the advantage of the technical program or principle are described.
Welding current Setting signal is become sine wave signal and synchronous with the drive singal of secondary inverting IGBT module from direct current signal, IGBT upper pipe conducting during positive half-wave work, pipe conducting under IGBT during negative half-wave, the conducting while of preventing.Given value of current signal and secondary inverting drive singal are Synchronization Control, effectively improving the IGBT module duty of secondary inverting, guaranteeing IGBT module when turning on and off close to zero current.Be zero or close to zero because inverter type welder is operated in the instantaneous given electric current of zero passage, so it is zero or almost nil that IGBT module turns on and off instantaneous heating, avoids overcurrent damage device and produce the noise of high-decibel.The utility model can improve inverter type welder welding performance, improve its reliability effectively reduce noise.
Accompanying drawing explanation
Fig. 1 is the structural representation of the secondary inverting control circuit of inverter type welder in the utility model detailed description of the invention;
Fig. 2 is the circuit diagram that the utility model is installed on a detailed description of the invention in inverter type welder;
The control circuit waveform schematic diagram that Fig. 3 is circuit shown in Fig. 2.
Description of reference numerals: 10, sine wave generator circuit, the 20, first current rectifying and wave filtering circuit, 30, secondary inverting drive circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model embodiment is described in detail.
Referring to Fig. 1, is the structural representation of the secondary inverting control circuit of inverter type welder in the utility model detailed description of the invention.
The secondary inverting control circuit of the utility model inverter type welder, comprises the sine wave generator circuit 10 for generating sine wave signal, for providing the first current rectifying and wave filtering circuit 20 of given value of current signal to the main power control plate in inverter type welder and for providing the secondary inverting drive circuit 30 of secondary inverting drive singal to the main power control plate in inverter type welder;
Described given value of current signal is the fluctuating signal formed after described first current rectifying and wave filtering circuit 20 carries out full-wave rectification to described sine wave signal, described secondary inverting drive singal to comprise on secondary inverting pipe drive singal under pipe drive singal and secondary inverting, on described secondary inverting, under pipe drive singal and described secondary inverting, pipe drive singal is described secondary inverting drive circuit 30 processes rear formation pulse signal to described sine wave signal, and on described secondary inverting, under pipe drive singal and described secondary inverting, the phase place of pipe drive singal is contrary;
Described sine wave generator circuit 10 connects described first current rectifying and wave filtering circuit 20 and described secondary inverting drive circuit 30, and described first current rectifying and wave filtering circuit 20 connects described secondary inverting drive circuit 30.
Particularly, refer to Fig. 2, for the utility model is installed on the circuit diagram of a detailed description of the invention in inverter type welder.
Host work process is: switch on power, through rectifier bridge rectification, capacitor filtering, medium frequency inversion, rectifying and wave-filtering, the inversion of secondary low frequency, closed feedback loop, export AC (the Alternating Current meeting welding requirements, exchange) or DC (Direct Current, direct current) voltage, electric current;
The secondary inverting control circuit course of work of inverter type welder: processed with synchronous by Waveform Control, high reliability, low noise when realizing exchanging 0 point (commutation position), export the interchange or the direct current that meet welding requirements.Wherein, it is also welding machine ac zero-crossing point that welding machine exchanged at 0, repeats no more.
Wherein in an embodiment, described sine wave generator circuit comprises ICL8038 chip, the first dc source+15V, the second dc source-15V, the first electric capacity C
1, the second electric capacity C
2, the 3rd electric capacity C
3, the second resistance R
2, the 3rd resistance R
3, the 4th resistance R
4with the 5th resistance R
5; 7th pin (be also pin 7 in Fig. 2, the marking class of other pin seemingly) of described ICL8038 chip is connected with octal.Described first dc source is positive 15V (being also+15V), and described second dc source is negative 15V (being also-15V).
Referring to Fig. 3, is the control circuit waveform schematic diagram of circuit shown in Fig. 2.
The waveform that described sine wave generator circuit produces is as " U4-2 is sinusoidal wave " in Fig. 3, and preferably, frequency is 50HZ.Those skilled in the art can learn, this sinusoidal wave frequency also can be other numerical value, can change according to the actual requirements.
Described first dc source+15V connects described second electric capacity C respectively
2one end, described second resistance R
2one end, described 3rd resistance R
3one end, described 5th resistance R
5one end and the 6th pin (also i.e. pin 6 in Fig. 2, the marking class of other pin seemingly, hereafter repeats no more) of described ICL8038 chip, described second electric capacity C
2other end ground connection, described second resistance R
2the other end connect the 4th pin of described ICL8038 chip, described 3rd resistance R
3the other end connect the 5th pin of described ICL8038 chip, described 5th resistance R
5the other end connect the 9th pin of described ICL8038 chip, described second dc source-15V connects described 3rd electric capacity C respectively
3one end, described first electric capacity C
1one end, described 4th resistance R
4one end and the 11 pin of described ICL8038 chip, described 3rd electric capacity C
3other end ground connection, described first electric capacity C
1the other end connect the tenth pin of described ICL8038 chip, described 4th resistance R
4the other end connect the 12 pin of described ICL8038 chip, the crus secunda of described ICL8038 chip connects described first current rectifying and wave filtering circuit and described secondary inverting drive circuit.
In Fig. 2, the crus secunda of described ICL8038 chip connects the 6th resistance R in described first current rectifying and wave filtering circuit
6one end (also i.e. the first resistance R
1one end) and described secondary inverting drive circuit in the 7th resistance R
7one end.
Wherein in an embodiment, described first current rectifying and wave filtering circuit comprises the 3rd dc source+15V, the 4th dc source-15V, the first variable resistor RP
1, the first Zener diode Z
1, the first diode V
1, the second diode V
2, the 5th electric capacity C
5, the 6th electric capacity C
6, the first resistance R
1, the 6th resistance R
6, the 8th resistance R
8, the 9th resistance R
9, the 11 resistance R
11, the 12 resistance R
12, the 13 resistance R
13, the 14 resistance R
14, the 15 resistance R
15, the first operational amplifier U
1A, the second operational amplifier U
1Bwith the 3rd operational amplifier U
1C; Described first operational amplifier U
1A, described second operational amplifier U
1Bwith described 3rd operational amplifier U
1Cbe integrated in LM324N.Described 3rd dc source is positive 15V, and described 4th dc source is negative 15V.Described first diode V
1with described second diode V
2for IN4148 type diode.
The sine wave signal that described sine wave generator circuit produces is converted to fluctuating signal by the first current rectifying and wave filtering circuit, and as given value of current signal (being also " the AC given value of current " in Fig. 2), by A point to the process of main power control plate.The waveform of the fluctuating signal that the first current rectifying and wave filtering circuit exports can see shown in " the AC given value of current signal " in Fig. 3.Preferably, frequency is 100HZ.Those skilled in the art can learn, frequency can change according to the actual requirements.
Described first resistance R
1one end connect described 6th resistance R
6one end, and connect described sine wave generator circuit and described secondary inverting drive circuit (described first resistance R simultaneously
1one end and described 6th resistance R
6one end connect the crus secunda of ICL8038 chip described in described sine wave generator circuit, the pin 2 also namely in Fig. 2, and connect R in described secondary inverting drive circuit
7one end), described 6th resistance R
6the other end connect described second operational amplifier U
1Binverting input, described 9th resistance R
9one end and described first diode V
1negative pole, described first diode V
1positive pole connect described second operational amplifier U
1Boutput and described second diode V
2negative pole, described second diode V
2positive pole connect described 9th resistance R
9the other end and described 11 resistance R
11one end, described second operational amplifier U
1Bin-phase input end connect described 8th resistance R
8one end, described 8th resistance R
8other end ground connection, described 11 resistance R
11the other end connect described first resistance R
1the other end, described 13 resistance R
13one end and described first operational amplifier U
1Ainverting input, described first operational amplifier U
1Ain-phase input end connect described 12 resistance R
12one end, described 12 resistance R
12other end ground connection, described first operational amplifier U
1Anegative power end connect described 4th dc source-15V and described 5th electric capacity C
5one end, described 5th electric capacity C
5other end ground connection, described first operational amplifier U
1Apositive power source terminal connect described 3rd dc source+15V and described 6th electric capacity C
6one end, described 6th electric capacity C
6other end ground connection, described first operational amplifier U
1Aoutput connect described 13 resistance R
13the other end and described 14 resistance R
14one end, described 14 resistance R
14the other end connect described first Zener diode Z
1negative pole and described first variable resistor RP
1the first stiff end, described first Zener diode Z
1plus earth, described first variable resistor RP
1second stiff end connect described 15 resistance R
15one end, described 15 resistance R
15other end ground connection, described first variable resistor RP
1sliding end connect described 3rd operational amplifier U
1Cin-phase input end, described 3rd operational amplifier U
1Cinverting input connect described 3rd operational amplifier U
1Coutput, described 3rd operational amplifier U
1Coutput provide given value of current signal to the main power control plate in inverter type welder.
Wherein in an embodiment, described secondary inverting drive circuit comprises the 5th dc source+15V, the 4th electric capacity C
4, the 7th resistance R
7, the tenth resistance R
10, four-operational amplifier U
2A, the 5th operational amplifier U
2Bwith the 4011 type NAND gate circuit (U in Fig. 2
3Aand U
3D); Described four-operational amplifier U
2Awith described 5th operational amplifier U
2Bbe integrated in LM358.
Described secondary inverting drive circuit production burst signal, and as secondary inverting drive singal, respectively from B, C point Fig. 2 to master board process; The waveform of the pulse signal that described secondary inverting drive circuit exports can see shown in " on secondary inverting the pipe drive singal " and " under secondary inverting pipe drive singal " in Fig. 3.Can draw from the waveform Fig. 3, given value of current signal and secondary inverting drive singal achieve synchronously, also when namely on secondary inverting, under pipe drive singal and secondary inverting, pipe drive singal switches (also during inverter type welder zero passage), given value of current signal is zero (or close to zero), thus so it is zero or almost nil that IGBT module turns on and off instantaneous heating, avoids overcurrent damage device and produce the noise of high-decibel.In addition, can draw from the waveform Fig. 3, on secondary inverting, under pipe drive singal and secondary inverting, the phase place of pipe drive singal is contrary.On secondary inverting, pipe drive singal is identical with the maximum amplitude of pipe drive singal under secondary inverting, and the cycle is identical, the pulse signal (being also square-wave signal) of phase place contrary (phase place means that phase difference is half period on the contrary).Preferably, frequency is 50HZ.Those skilled in the art can learn, frequency can change according to the actual requirements.
Described 7th resistance R
7one end connect described sine wave generator circuit and described first current rectifying and wave filtering circuit (described 7th resistance R
7one end connect the crus secunda of ICL8038 chip described in described sine wave generator circuit, the pin 2 also namely in Fig. 2; And connect the first resistance R described in described first current rectifying and wave filtering circuit
1one end and described 6th resistance R
6one end), described 7th resistance R
7the other end connect described four-operational amplifier U
2Ain-phase input end, described four-operational amplifier U
2Ainverting input and negative power end ground connection, described four-operational amplifier U
2Apositive power source terminal connect described 5th dc source+15V and described 4th electric capacity C
4one end, described 4th electric capacity C
4other end ground connection, described four-operational amplifier U
2Aoutput connect described tenth resistance R
10one end, described tenth resistance R
10the other end connect described 5th operational amplifier U
2Bin-phase input end, described 5th operational amplifier U
2Binverting input connect described 5th operational amplifier U
2Boutput, described 5th operational amplifier U
2Boutput connect the first pin (U of described 4011 type NAND gate circuits
3Ain pin 1), crus secunda (U
3Ain pin 2), the 12 pin (U
3Din pin 12) and the tenth tripod (U
3Din pin 13), 14 pin (pin 14) of described 4011 type NAND gate circuits connects described 5th dc source+15V, 7th pin (pin 7) ground connection, 11 pin (pin 11) connects described tripod (pin 3), described 5th operational amplifier U
2Boutput and the tripod (U of described 4011 type NAND gate circuits
3Ain pin 3) provide secondary inverting drive singal to the main power control plate in inverter type welder.
According to Fig. 2, current feedback signal is by the IGBT module of mainboard process by a F point control inversion (being also " medium frequency inverter " in Fig. 2), control the size of output current, the IGBT module (secondary inverting upper, lower tube drive singal) of E point control secondary inverting simultaneously, realizes exchanging or direct current output.
Below advantage of the present utility model or principle are described.
Welding current Setting signal is become sine wave signal and synchronous with the drive singal of secondary inverting IGBT module from direct current signal, IGBT upper pipe conducting during positive half-wave work, pipe conducting under IGBT during negative half-wave, the conducting while of preventing.Given value of current signal and secondary inverting drive singal are Synchronization Control, effectively improving the IGBT module duty of secondary inverting, guaranteeing IGBT module when turning on and off close to zero current.Be zero or close to zero because inverter type welder is operated in the instantaneous given electric current of zero passage, so it is zero or almost nil that IGBT module turns on and off instantaneous heating, avoids overcurrent damage device and produce the noise of high-decibel.The utility model can improve inverter type welder welding performance, improve its reliability effectively reduce noise.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (10)
1. the secondary inverting control circuit of an inverter type welder, it is characterized in that, comprising the sine wave generator circuit for generating sine wave signal, for providing the first current rectifying and wave filtering circuit of given value of current signal to the main power control plate in inverter type welder and for providing the secondary inverting drive circuit of secondary inverting drive singal to the main power control plate in inverter type welder;
Described given value of current signal is the fluctuating signal formed after described first current rectifying and wave filtering circuit carries out full-wave rectification to described sine wave signal, described secondary inverting drive singal to comprise on secondary inverting pipe drive singal under pipe drive singal and secondary inverting, on described secondary inverting, under pipe drive singal and described secondary inverting, pipe drive singal is described secondary inverting drive circuit processes rear formation pulse signal to described sine wave signal, and on described secondary inverting, under pipe drive singal and described secondary inverting, the phase place of pipe drive singal is contrary;
Described sine wave generator circuit connects described first current rectifying and wave filtering circuit and described secondary inverting drive circuit, and described first current rectifying and wave filtering circuit connects described secondary inverting drive circuit.
2. the secondary inverting control circuit of inverter type welder according to claim 1, it is characterized in that, described sine wave generator circuit comprises ICL8038 chip, the first dc source, the second dc source, the first electric capacity, the second electric capacity, the 3rd electric capacity, the second resistance, the 3rd resistance, the 4th resistance and the 5th resistance;
Described first dc source connects one end of described second electric capacity respectively, one end of described second resistance, one end of described 3rd resistance, one end of described 5th resistance and the 6th pin of described ICL8038 chip, the other end ground connection of described second electric capacity, the other end of described second resistance connects the 4th pin of described ICL8038 chip, the other end of described 3rd resistance connects the 5th pin of described ICL8038 chip, the other end of described 5th resistance connects the 9th pin of described ICL8038 chip, described second dc source connects one end of described 3rd electric capacity respectively, one end of described first electric capacity, one end of described 4th resistance and the 11 pin of described ICL8038 chip, the other end ground connection of described 3rd electric capacity, the other end of described first electric capacity connects the tenth pin of described ICL8038 chip, the other end of described 4th resistance connects the 12 pin of described ICL8038 chip, the crus secunda of described ICL8038 chip connects described first current rectifying and wave filtering circuit and described secondary inverting drive circuit.
3. the secondary inverting control circuit of inverter type welder according to claim 2, is characterized in that, the 7th pin of described ICL8038 chip is connected with octal.
4. the secondary inverting control circuit of inverter type welder according to claim 2, is characterized in that, described first dc source is positive 15V, and described second dc source is negative 15V.
5. the secondary inverting control circuit of inverter type welder according to claim 1, it is characterized in that, described first current rectifying and wave filtering circuit comprises the 3rd dc source, the 4th dc source, the first variable resistor, the first Zener diode, the first diode, the second diode, the 5th electric capacity, the 6th electric capacity, the first resistance, the 6th resistance, the 8th resistance, the 9th resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the first operational amplifier, the second operational amplifier and the 3rd operational amplifier;
One end of described first resistance connects one end of described 6th resistance, and connect described sine wave generator circuit and described secondary inverting drive circuit simultaneously, the other end of described 6th resistance connects the inverting input of described second operational amplifier, one end of described 9th resistance and the negative pole of described first diode, the positive pole of described first diode connects the output of described second operational amplifier and the negative pole of described second diode, the positive pole of described second diode connects the other end of described 9th resistance and one end of described 11 resistance, the in-phase input end of described second operational amplifier connects one end of described 8th resistance, the other end ground connection of described 8th resistance, the other end of described 11 resistance connects the other end of described first resistance, one end of described 13 resistance and the inverting input of described first operational amplifier, the in-phase input end of described first operational amplifier connects one end of described 12 resistance, the other end ground connection of described 12 resistance, the negative power end of described first operational amplifier connects one end of described 4th dc source and described 5th electric capacity, the other end ground connection of described 5th electric capacity, the positive power source terminal of described first operational amplifier connects one end of described 3rd dc source and described 6th electric capacity, the other end ground connection of described 6th electric capacity, the output of described first operational amplifier connects the other end of described 13 resistance and one end of described 14 resistance, the other end of described 14 resistance connects the negative pole of described first Zener diode and described first variable-resistance first stiff end, the plus earth of described first Zener diode, described first variable-resistance second stiff end connects one end of described 15 resistance, the other end ground connection of described 15 resistance, described first variable-resistance sliding end connects the in-phase input end of described 3rd operational amplifier, the inverting input of described 3rd operational amplifier connects the output of described 3rd operational amplifier, the output of described 3rd operational amplifier provides given value of current signal to the main power control plate in inverter type welder.
6. the secondary inverting control circuit of inverter type welder according to claim 5, is characterized in that, described first operational amplifier, described second operational amplifier and described 3rd operational amplifier are integrated in LM324N.
7. the secondary inverting control circuit of inverter type welder according to claim 5, is characterized in that, described 3rd dc source is positive 15V, and described 4th dc source is negative 15V.
8. the secondary inverting control circuit of inverter type welder according to claim 5, is characterized in that, described first diode and described second diode are IN4148 type diode.
9. the secondary inverting control circuit of inverter type welder according to claim 1, it is characterized in that, described secondary inverting drive circuit comprises the 5th dc source, the 4th electric capacity, the 7th resistance, the tenth resistance, four-operational amplifier, the 5th operational amplifier and 4011 type NAND gate circuits;
One end of described 7th resistance connects described sine wave generator circuit and described first current rectifying and wave filtering circuit, the other end of described 7th resistance connects the in-phase input end of described four-operational amplifier, the inverting input of described four-operational amplifier and negative power end ground connection, the positive power source terminal of described four-operational amplifier connects one end of described 5th dc source and described 4th electric capacity, the other end ground connection of described 4th electric capacity, the output of described four-operational amplifier connects one end of described tenth resistance, the other end of described tenth resistance connects the in-phase input end of described 5th operational amplifier, the inverting input of described 5th operational amplifier connects the output of described 5th operational amplifier, the output of described 5th operational amplifier connects the first pin of described 4011 type NAND gate circuits, crus secunda, 12 pin and the tenth tripod, 14 pin of described 4011 type NAND gate circuits connects described 5th dc source, 7th pin ground connection, 11 pin connects described tripod, the output of described 5th operational amplifier and the tripod of described 4011 type NAND gate circuits provide secondary inverting drive singal to the main power control plate in inverter type welder.
10. the secondary inverting control circuit of inverter type welder according to claim 9, is characterized in that, described four-operational amplifier and described 5th operational amplifier are integrated in LM358.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420568966.0U CN204122901U (en) | 2014-09-29 | 2014-09-29 | The secondary inverting control circuit of inverter type welder |
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|---|---|---|---|
| CN201420568966.0U CN204122901U (en) | 2014-09-29 | 2014-09-29 | The secondary inverting control circuit of inverter type welder |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420568966.0U Expired - Fee Related CN204122901U (en) | 2014-09-29 | 2014-09-29 | The secondary inverting control circuit of inverter type welder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204122901U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105728901A (en) * | 2016-01-25 | 2016-07-06 | 上海威特力焊接设备制造股份有限公司 | Secondary inverter driving circuit for alternating current-direct current argon arc welding machine |
-
2014
- 2014-09-29 CN CN201420568966.0U patent/CN204122901U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105728901A (en) * | 2016-01-25 | 2016-07-06 | 上海威特力焊接设备制造股份有限公司 | Secondary inverter driving circuit for alternating current-direct current argon arc welding machine |
| CN105728901B (en) * | 2016-01-25 | 2017-08-01 | 上海威特力焊接设备制造股份有限公司 | One kind is used for AC-DC argon arc welding machine secondary inverting drive circuit |
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