CN203636178U - Inverter welder - Google Patents

Inverter welder Download PDF

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Publication number
CN203636178U
CN203636178U CN201320857852.3U CN201320857852U CN203636178U CN 203636178 U CN203636178 U CN 203636178U CN 201320857852 U CN201320857852 U CN 201320857852U CN 203636178 U CN203636178 U CN 203636178U
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China
Prior art keywords
capacitor
circuit
resistance
pin
ground connection
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Withdrawn - After Issue
Application number
CN201320857852.3U
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Chinese (zh)
Inventor
谭军
林胜利
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Zhejiang Edon Mechanical & Electrical Co Ltd
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Zhejiang Edon Mechanical & Electrical Co Ltd
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Priority to CN201320857852.3U priority Critical patent/CN203636178U/en
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Abstract

The utility model provides an inverter welder, and belongs to the technical field of welders. The inverter welder solves the problems that an existing inverter welder needs sinusoidal input currents, and input voltages are narrow in width. The inverter welder comprises a PWM control circuit, a rectification filter circuit, an inverter circuit and a voltage-reduction rectifying circuit. The rectification filter circuit, the inverter circuit and the voltage-reduction rectifying circuit are sequentially connected. The rectification filter circuit is connected with an external power source, the voltage-reduction rectifying circuit is connected with the output end of the welder, the rectification filter circuit is connected with the PWM control circuit through an input voltage feedback circuit, and the voltage-reduction rectifying circuit is connected with the PWM control circuit through an output current feedback circuit. The inverter welder further comprises a boost main circuit and a PFC control circuit connected with the boost main circuit. The boost main circuit is connected between the rectification filter circuit and the inverter circuit, and the rectification filter circuit is connected with the PFC control circuit through an input current feedback circuit. The inverter welder has the advantages that sinusoidal input currents are not needed, and wide voltage input can be achieved.

Description

A kind of inversion welding machine
Technical field
The utility model belongs to welding machine technical field, relates to a kind of inversion welding machine.
Background technology
Existing inversion welding machine is three-phase alternating current to be obtained after rectification, filtering to a more level and smooth direct current, (be generally IGBT or FET by power switch component, down together) inverter circuit of composition becomes this direct current in 15 to 100kHz alternating current, after the step-down of intermediate frequency main transformer, again rectifying and wave-filtering obtain the output welding current of direct current stably or again inversion export the alternating current of required frequency.
Traditional inversion welding machine front end diode rectifier, seriously distorts input current, not only electrical network is produced serious harmonic pollution but also causes the power factor of Switching Power Supply low.Simultaneously, the active pfc controller of traditional CCM, as UC3854, in this traditional controller, error amplifier input voltage U need be multiplied by sinusoidal wave with reference to model I, obtain Sinusoidal Input Currents, this traditional CCM pfc circuit control, must introduce sinusoidal reference signal, and due to Voltage loop and two control loops of electric current loop, control device peripheral components is various, and design is complicated.
Summary of the invention
The purpose of this utility model is to have the problems referred to above for existing technology, thereby has proposed a kind of inversion welding machine without Sinusoidal Input Currents and the more wider input voltage environment of energy wide voltage input adaptation.
The purpose of this utility model can realize by following technical proposal: a kind of inversion welding machine, comprise pwm control circuit and the current rectifying and wave filtering circuit being connected successively, inverter circuit and step-down rectifying circuit, described current rectifying and wave filtering circuit is connected with extraneous power supply, step-down rectifying circuit is connected with welding terminal, current rectifying and wave filtering circuit is connected with pwm control circuit by input voltage feedback circuit, step-down rectifying circuit is connected with pwm control circuit by output current feedback circuit, it is characterized in that: also comprise boost main circuit and the PFC control circuit being connected with the main circuit that boosts, the described main circuit that boosts is connected between current rectifying and wave filtering circuit and inverter circuit, described current rectifying and wave filtering circuit is connected with PFC control circuit by input current feedback circuit.
In above-mentioned a kind of inversion welding machine, the described main circuit that boosts mainly comprises inductor L2, triode Q1, capacitor C 2, diode VD1, diode VD2, inductor L1, capacitor C X1, capacitor C X2, capacitor C Y1, capacitor C Y2, rectifier PD, socket VH-07, drive light lotus root A3120, variable resistor RV1 and variable resistor RT1, capacitor C X1 and capacitor C X2 are connected to inductor L1 two ends, input current is by the input of capacitor C X1 two ends, after capacitor C Y1 and capacitor C Y2 series connection, connect capacitor C X2 two ends, the link ground connection of capacitor C Y1 and capacitor C Y2, described variable resistor RV1 is in parallel with capacitor C X2, an input of one termination rectifier PD and meet power supply VCC2, the other end connects another input of rectifier PD by variable resistor RT1 and K switch, two output one end combination hub VH-07 of rectifier PD, the other end connects respectively the positive pole of inductor L2 one end and diode VD2, another terminating diode VD1 positive pole of inductor L2 and the colelctor electrode of triode Q1, the base stage of triode Q1 is connected with driving light lotus root A3120 with emitter stage, diode VD2 negative pole combination hub VH-07, diode VD1 negative pole and capacitor C 2 positive poles, the negative pole of capacitor C 2 is by resistance R and capacitor C 3 ground connection.
In above-mentioned a kind of inversion welding machine, described PFC control circuit comprises control chip ICE2PCS01, 1 pin ground connection in control chip ICE2PCS01D, 2 pin are by capacitor C 5 ground connection, 3 pin are met above-mentioned socket VH-07 and are passed through capacity earth by resistance R 4, 4 pin are by two parallel resistance ground connection, on 5 pin, be connected with resistance R 7, capacitor C 3 and capacitor C 4, and ground connection in parallel with capacitor C 4 after capacitor C 3 and resistance R 7 series connection, on 6 pin, be connected with resistance R 4, resistance R 5, resistance R 6, resistance R 8, resistance R 9, resistance R 10 and capacitor C 8, resistance R 5, a terminating resistor R4 after resistance R 6 and capacitor C 8 connection parallel with one another, resistance R 8 and 6 pin, other end ground connection, resistance R 4 other ends meet above-mentioned socket VH-07, resistance R 8 is by resistance R 9 and resistance R 10 meet above-mentioned socket VH-07 successively, 7 pin meet above-mentioned socket VH-07, by capacitor C 10 ground connection with by capacitor C 9 ground connection, the positive pole of capacitor C 9 connects power supply VCC and 7 above-mentioned pin, minus earth, 8 pin meet above-mentioned socket VH-07 and pass through diode D1 ground connection.
Prior art is compared, and this inversion welding machine has following a little several:
1, adopt the control mode of current average, therefore without the direct sinusoidal reference signal of feed-in chip;
2, be suitable for the wide region AC circuit input from 85V to 265V, thereby adapt to more wider voltage environment inputs;
3, control circuit is simple, controls stable.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is the circuit diagram of main circuit of boosting.
Fig. 3 is the circuit diagram of PFC control circuit.
Detailed description of the invention
Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
As Fig. 1, shown in 2 and 3, this inversion welding machine comprises pwm control circuit and the current rectifying and wave filtering circuit being connected successively, inverter circuit and step-down rectifying circuit, current rectifying and wave filtering circuit is connected with extraneous power supply, step-down rectifying circuit is connected with welding terminal, current rectifying and wave filtering circuit is connected with pwm control circuit by input voltage feedback circuit, step-down rectifying circuit is connected with pwm control circuit by output current feedback circuit, also comprise boost main circuit and the PFC control circuit being connected with the main circuit that boosts, the main circuit that boosts is connected between current rectifying and wave filtering circuit and inverter circuit, current rectifying and wave filtering circuit is connected with PFC control circuit by input current feedback circuit.
The main circuit that boosts mainly comprises inductor L2, triode Q1, capacitor C 2, diode VD1, diode VD2, inductor L1, capacitor C X1, capacitor C X2, capacitor C Y1, capacitor C Y2, rectifier PD, socket VH-07, drive light lotus root A3120, variable resistor RV1 and variable resistor RT1, capacitor C X1 and capacitor C X2 are connected to inductor L1 two ends, input current is by the input of capacitor C X1 two ends, after capacitor C Y1 and capacitor C Y2 series connection, connect capacitor C X2 two ends, the link ground connection of capacitor C Y1 and capacitor C Y2, variable resistor RV1 is in parallel with capacitor C X2, an input of one termination rectifier PD and meet power supply VCC2, the other end connects another input of rectifier PD by variable resistor RT1 and K switch, two output one end combination hub VH-07 of rectifier PD, the other end connects respectively the positive pole of inductor L2 one end and diode VD2, another terminating diode VD1 positive pole of inductor L2 and the colelctor electrode of triode Q1, the base stage of triode Q1 is connected with driving light lotus root A3120 with emitter stage, diode VD2 negative pole combination hub VH-07, diode VD1 negative pole and capacitor C 2 positive poles, the negative pole of capacitor C 2 is by resistance R and capacitor C 3 ground connection.At circuit input side, RV1 is overvoltage protection element, and RT1 is used for limiting the surge current between the welding machine starting period, L1 and CX1, and CX2 and CY1, CY2 suppresses as radio frequency.High frequency electric ripple in inductor L2 is by electromagnetic interface filter and capacitor C 1 filtering.
PFC control circuit comprises control chip ICE2PCS01, 1 pin ground connection in control chip ICE2PCS01D, 2 pin are by capacitor C 5 ground connection, 3 pin are met above-mentioned socket VH-07 and are passed through capacity earth by resistance R 4, 4 pin are by two parallel resistance ground connection, on 5 pin, be connected with resistance R 7, capacitor C 3 and capacitor C 4, and ground connection in parallel with capacitor C 4 after capacitor C 3 and resistance R 7 series connection, on 6 pin, be connected with resistance R 4, resistance R 5, resistance R 6, resistance R 8, resistance R 9, resistance R 10 and capacitor C 8, resistance R 5, a terminating resistor R4 after resistance R 6 and capacitor C 8 connection parallel with one another, resistance R 8 and 6 pin, other end ground connection, resistance R 4 other ends meet above-mentioned socket VH-07, resistance R 8 is by resistance R 9 and resistance R 10 meet above-mentioned socket VH-07 successively, 7 pin meet above-mentioned socket VH-07, by capacitor C 10 ground connection with by capacitor C 9 ground connection, the positive pole of capacitor C 9 connects power supply VCC and 7 above-mentioned pin, minus earth, 8 pin meet above-mentioned socket VH-07 and pass through diode D1 ground connection.This chip pin effect, 1 pin GND ground; 2 pin ICOMP are the output of the inner operational transconductance amplifier of electric current loop; The input that 3 pin ISENSE are electric current loop; 4 pin FPEQ outer meeting resistances, adjustable frequency within the scope of 50KHz~250KHz; 5 pin VCOMP external voltage ring compensating element,s; 6 pin VSENCE are Voltage loop input, and when rated output voltage, this pin voltage should be 5V; The external chip power of 7 pin VCC, operating voltage is at 10V~21V; 8 pin GATE pulse output ends.PFC switch is selected high-frequency I GBT, and booster diode adopts silicon carbide schottky diode.The non-essential resistance of the pin 4 of ICE2PCS01 is as switching frequency is set, and the capacitor C 5 on pin 2 compensates as current loop, C3, R7 and C4 composition voltage circuit compensating network.The VCC voltage of ICE2PCS01 is by TOP244YN(AC85V~260V) accessory power supply that forms provides.Blow-up flow point enters input filter circuit, after rectification, flows to the main circuit that boosts.
This welding machine adopts a kind of novel CCM-PFC controller IEC2PCS01 to be applicable to the pfc circuit of BOOST structure, adopt the control mode of current average, and without the sinusoidal reference signal of direct feed-in chip, and adopt electric current average control method, power factor can have been reached and approach 1.IEC2PCS01 is suitable for the wide region AC circuit input from 85V to 265V, supports step-up transformer topology, under Average Current Control CCM, works.IEC2PCS01 contains electric current current controlled circuit and Control of Voltage loop.Inner current loops control average current input is followed input voltage, keeps sinusoidal profile.Under light condition, boost inductor inductance can make IEC2PCS01 and system enter discontinuous conduction mode, and causes average current input wave distortion.But the harmonic current producing is still very low, can meet the D generic request of IEC1000-3-2 standard.Voltage loop control output bus voltage, does not have multiplier in IEC2PCS01 inside, and replaces it with non-linear gain circuit, thereby has reduced the pin number of IEC2PCS01.
PFC controls operation principle: this circuit is made up of two parts: L2, and Q1, C2, the devices such as VD1 and VD2 form the main circuit that boosts.ICE2PCS01 and peripheral components form PFC control circuit, realize the control to net side input current and output voltage.
The course of work of circuit is as follows: after the main circuit that boosts powers on, give the power supply of PFC control circuit by accessory power supply (Switching Power Supply forming taking TOP244YN as core).In the time that the voltage on the power supply pin (the 7th pin) of control chip ICE2PCS01 reaches 15V, ICE2PCS01 chip is started working.Now, the dutycycle maximum of the driving model of PFC part output.
Along with the increase of inductive current in the main circuit that boosts, in the time that electric current reaches the limit value of peak point current, the output of PFCOUT will be closed by the internal comparator of ICE2PCS01, thereby switching tube Q1 is also turned off, now the magnetic energy in inductance L 2 will change the polarity of voltage at inductance two ends, inductive drop VL and supply voltage VS (voltage after rectification) are added, its magnitude of voltage is higher than the voltage in capacitor C 2, high-frequency rectification diode VD1 conducting, the electric current of inductance L 2 starts linear decline, to capacitor C 2 and load supplying.In the time that switching tube drives conducting again, high-frequency rectification diode VD1 is in cut-off state, and capacitor C 2 is to load discharge.
PFC control circuit is made up of dicyclo, an electric current loop (interior ring) and a Voltage loop (outer shroud).In converter, the mean value of electric current loop (interior ring) control inputs electric current, has higher speed control.Like this, the electric current of the switching tube of flowing through can be both continuous current mode (CCM), can be also discontinuous current-mode (DCM).Electric current in inductance L 2 flows through and detects resistance R 1, detects ohmically average voltage and be input to the pin 3 (ISENSE) of ICE2PCS01.It is average that current detection voltage on the pin 3 of ICE2PCS01 is cross over amplifier OTA2 by internal arithmetic, and the capacitor C 5 that the OTA2 output (pin 2) of ICE2PCS01 connects completes current loop compensation.Under normal mode of operation, the charging and discharging of capacitor C 5 is realized the average of signal, and the voltage on pin 2 is directly proportional to average inductor current.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendments or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Claims (3)

1. an inversion welding machine, comprise pwm control circuit and the current rectifying and wave filtering circuit being connected successively, inverter circuit and step-down rectifying circuit, described current rectifying and wave filtering circuit is connected with extraneous power supply, step-down rectifying circuit is connected with welding terminal, current rectifying and wave filtering circuit is connected with pwm control circuit by input voltage feedback circuit, step-down rectifying circuit is connected with pwm control circuit by output current feedback circuit, it is characterized in that: also comprise boost main circuit and the PFC control circuit being connected with the main circuit that boosts, the described main circuit that boosts is connected between current rectifying and wave filtering circuit and inverter circuit, described current rectifying and wave filtering circuit is connected with PFC control circuit by input current feedback circuit.
2. a kind of inversion welding machine according to claim 1, is characterized in that, the described main circuit that boosts mainly comprises inductor L2, triode Q1, capacitor C 2, diode VD1, diode VD2, inductor L1, capacitor C X1, capacitor C X2, capacitor C Y1, capacitor C Y2, rectifier PD, socket VH-07, drive light lotus root A3120, variable resistor RV1 and variable resistor RT1, capacitor C X1 and capacitor C X2 are connected to inductor L1 two ends, input current is by the input of capacitor C X1 two ends, after capacitor C Y1 and capacitor C Y2 series connection, connect capacitor C X2 two ends, the link ground connection of capacitor C Y1 and capacitor C Y2, described variable resistor RV1 is in parallel with capacitor C X2, an input of one termination rectifier PD and meet power supply VCC2, the other end connects another input of rectifier PD by variable resistor RT1 and K switch, two output one end combination hub VH-07 of rectifier PD, the other end connects respectively the positive pole of inductor L2 one end and diode VD2, another terminating diode VD1 positive pole of inductor L2 and the colelctor electrode of triode Q1, the base stage of triode Q1 is connected with driving light lotus root A3120 with emitter stage, diode VD2 negative pole combination hub VH-07, diode VD1 negative pole and capacitor C 2 positive poles, the negative pole of capacitor C 2 is by resistance R and capacitor C 3 ground connection.
3. a kind of inversion welding machine according to claim 2, it is characterized in that, described PFC control circuit comprises control chip ICE2PCS01, 1 pin ground connection in control chip ICE2PCS01D, 2 pin are by capacitor C 5 ground connection, 3 pin are met above-mentioned socket VH-07 and are passed through capacity earth by resistance R 4, 4 pin are by two parallel resistance ground connection, on 5 pin, be connected with resistance R 7, capacitor C 3 and capacitor C 4, and ground connection in parallel with capacitor C 4 after capacitor C 3 and resistance R 7 series connection, on 6 pin, be connected with resistance R 4, resistance R 5, resistance R 6, resistance R 8, resistance R 9, resistance R 10 and capacitor C 8, resistance R 5, a terminating resistor R4 after resistance R 6 and capacitor C 8 connection parallel with one another, resistance R 8 and 6 pin, other end ground connection, resistance R 4 other ends meet above-mentioned socket VH-07, resistance R 8 is by resistance R 9 and resistance R 10 meet above-mentioned socket VH-07 successively, 7 pin meet above-mentioned socket VH-07, by capacitor C 10 ground connection with by capacitor C 9 ground connection, the positive pole of capacitor C 9 connects power supply VCC and 7 above-mentioned pin, minus earth, 8 pin meet above-mentioned socket VH-07 and pass through diode D1 ground connection.
CN201320857852.3U 2013-12-24 2013-12-24 Inverter welder Withdrawn - After Issue CN203636178U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103706923A (en) * 2013-12-24 2014-04-09 浙江颐顿机电有限公司 Inverter welder
CN105186853A (en) * 2015-08-17 2015-12-23 深圳华意隆电气股份有限公司 Three-phase staggered active PFC welding and cutting machine power supply
CN106425027A (en) * 2016-07-13 2017-02-22 苏州新逸喆电子科技有限公司 Current control module applied to wireless electric welding machine
CN107414252A (en) * 2017-09-21 2017-12-01 浙江雅创机电科技有限公司 A kind of inversion manual welding machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103706923A (en) * 2013-12-24 2014-04-09 浙江颐顿机电有限公司 Inverter welder
CN103706923B (en) * 2013-12-24 2015-09-09 浙江颐顿机电有限公司 A kind of inversion welding machine
CN105186853A (en) * 2015-08-17 2015-12-23 深圳华意隆电气股份有限公司 Three-phase staggered active PFC welding and cutting machine power supply
CN105186853B (en) * 2015-08-17 2018-01-26 深圳华意隆电气股份有限公司 A kind of active PFC weldings electromechanical source of three phase cross-over formulas
CN106425027A (en) * 2016-07-13 2017-02-22 苏州新逸喆电子科技有限公司 Current control module applied to wireless electric welding machine
CN106425027B (en) * 2016-07-13 2018-08-10 苏州新逸喆电子科技有限公司 A kind of current control module for wireless electric welding machine
CN107414252A (en) * 2017-09-21 2017-12-01 浙江雅创机电科技有限公司 A kind of inversion manual welding machine
CN107414252B (en) * 2017-09-21 2019-10-29 浙江雅创机电科技有限公司 A kind of inversion manual welding machine

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Granted publication date: 20140611

Effective date of abandoning: 20150909

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