CN101056062A - Power device of arc device - Google Patents
Power device of arc device Download PDFInfo
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- CN101056062A CN101056062A CN 200610075358 CN200610075358A CN101056062A CN 101056062 A CN101056062 A CN 101056062A CN 200610075358 CN200610075358 CN 200610075358 CN 200610075358 A CN200610075358 A CN 200610075358A CN 101056062 A CN101056062 A CN 101056062A
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- 238000006243 chemical reaction Methods 0.000 claims description 14
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims 1
- 238000010891 electric arc Methods 0.000 abstract description 8
- 238000003466 welding Methods 0.000 description 14
- 238000004804 winding Methods 0.000 description 12
- 230000001360 synchronised effect Effects 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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Abstract
The present invention relates to a power supply device that is used together with an electric arc device, and the power supply device includes a plurality of electrical power packages (2a, 2b) that has a same capability. Each power supply package (2a, 2b) includes a rectification (4a, 4b) circuit at the input side, an inverter (10a, 10b), a transformer (12a, 12b) and a rectification circuit (18a, 18b) at the output side. A control circuit (30a, 30b) controls the inverter (10a, 10b) by inosculating itself with the reference signals provided by a reference signal generator (34a, 34b) through the high-efficiency current flowing through the inverter (10a, 10b) or the current flowing through the rectification circuit (18a, 18b) at the output side. The output ends of the rectification circuit (18a, 18b) at the output side of the electrical power packages are connected in parallel. And the values of the reference signals generated by the reference signal generator (34a, 34b) are always equal by the function of the equipotential circuits (40, 42).
Description
Technical field
The present invention relates to be used for the power-supply device of device of arc such as picture arc welding machine and arc cutting machine.
Background technology
The user sometimes requires to be provided for having with electric arc equipment manufacturers the power-supply device with device of arc of various output capacities.A kind of embodiment that openly addresses these problems among the open Japan patent applicant announce JP08-001350A that announces on January 9th, 1996.
According to disclosed the present invention in this announcement, use a kind of inverter style resistance welding machine with normal capacity.The normal capacity resistance welding machine uses the DC power supply that obtains by the industrial AC power supplies of conversion in converter circuit.Then, the DC power supply of institute's conversion transforms to high frequency electric source in inverter, and high frequency electric source is couple in the secondary winding side again has a winding in the bonding machine transformer of rectification circuit.And provide the inverter control unit of control inverter, produce synchronous signal generating circuit and communicator from the synchronizing signal of industrial AC power supplies.Inverter control unit is controlled to inverter with synchronous from the synchronizing signal of synchronous signal generating circuit.
Provide a plurality of set output capacities consistent such normal capacity inverter style resistance welding machine, and the secondary winding side output of the bonding machine transformer in each bonding machine is parallel the connection with the desired output capacity of user.Communicator is connected with communicator in other inverter style resistance welding machine by communication line.
Wherein inverter style resistance welding machine is with the bonding machine of deciding, and other inverter style resistance welding machines are as driven bonding machine.Main bonding machine sends and the synchronous signal of driven bonding machine by communicator.Be controlled to the inverter of main bonding machine and driven bonding machine with the synchronizing signal of main inverter type resistance welding machine synchronous.
Owing to producing electromagnetic noise with arc discharge in the device of arc.Therefore, if disclosed technology is applied to use device of arc in JP08-001350, then electromagnetic noise may cause the faulty operation of communicator, so the device that prevents this faulty operation must be provided, this needs some expenses.
The purpose of this invention is to provide a kind of power-supply device that is used for device of arc, this power-supply device adopts into the normal capacity power pack of unit form so that satisfy the desired various output capacities of user, but, do not comprise the communicator as above-described communicator in order to obtain this effect.
Summary of the invention
According to one embodiment of the present invention, be used for comprising a plurality of power pack (power blocks) with same capability with the power-supply device of device of arc.Power pack has identical structure, each power pack comprises and is used for industrial AC power supplies is transformed to the AC of DC power supply to the DC converting means, be used for resulting DC power conversion to the DC of high frequency electric source being used to make resulting high frequency electric source to change the transformer of voltage and be used to make the high frequency electric source that has changed voltage to transform to the high frequency of DC power supply to the DC converting means to the high frequency conversion device.Control device is to flow through DC to the electric current of high frequency conversion device or flow through this sample loading mode control DC that high frequency can be complementary with the reference signal that reference signal generator is carried to the electric current of DC converting means to the high frequency conversion device.For desirable output capacity is provided, a plurality of such a power pack are to use under the situation that high frequency is connected in parallel mutually to the output of DC converting means.The reference signal generator of each power pack makes each reference signal keep equivalent during equivalent holding device works.
Concerning the reference signal generator that a terminal is respectively arranged on the side in each its reference potential and output, equivalent holding device can comprise first circuit of the reference potential side terminal that is used to connect each reference generator and be used to be connected second circuit that reference generator is exported side terminal.
A plurality of power pack can be at least one pair of power pack.Power pack applies the power supply terminal of AC voltage and the 2nd AC voltage to having a pair of selection.The 2nd AC voltage can have the about two times numerical value of an AC voltage value.(switching) device is switched in configuration, the AC that switching device shifter is handled when an AC voltage is applied between the power supply terminal in the power pack is connected in parallel between the power supply terminal to the input of DC converting means, and AC is connected in series between the power supply terminal and the switching device shifter of action to the input of DC converting means when the 2nd AC voltage is applied between the power supply terminal.
With a kind of replacement execution mode, switching device shifter puts on the DC that can handle when wherein that AC is to the DC converting means in the power pack at first voltage and is connected in that AC in the power pack in parallel to the output of DC converting means to the input of high frequency conversion device, is connected in series in that AC in the power pack and can handle DC when second voltage puts on that AC to the DC converting means to the output of DC converting means to the input of high frequency conversion device.
Description of drawings
Fig. 1 is the block diagram according to the power-supply device that is used for device of arc of first embodiment of the invention.
Fig. 2 is the block diagram of the reference signal generation part in Fig. 1 power-supply device.
Fig. 3 is the block diagram according to the power-supply device that is used for device of arc of second embodiment of the invention.
Embodiment
As shown in Figure 1, comprise according to first embodiment of the invention and a kind of power-supply device that uses simultaneously with device of arc a plurality of, for example two, power pack 2a and 2b.These two power pack 2a have identical output capacity and have identical structure with 2b.Therefore, only describe one of them power pack in the following description in detail, i.e. power pack 2a, and another power pack 2b is not described in detail.
Should be noted that letter " a " and " b " add the reference numerals that is used for power pack 2a and 2b part respectively to.Thereby the part that has the reference numerals that is attached to reference numerals back a is the part of a power pack 2a, and the part that has a reference numerals that is attached to reference numerals back b is the part of a power supply 2b.
The high frequency voltage of inverter 10a output is applied to transformer, for example on high frequency transformer 12a winding 14a two ends.High frequency is to the DC converting means, and for example outlet side rectification circuit 18a is connected with the secondary winding 16a of high frequency transformer 12a.Specifically, the negative pole of the rectifier diode 20a among the outlet side rectification circuit 18a is connected with the end of secondary winding 16a, and the negative pole of rectifier diode 22a is connected with another end of secondary winding 16a.The positive pole of diode 20a and 22a together with load, for example first of arc discharge lamp 24 terminal the connection.Secondary winding 16a has a centre tap 26a in the above, and centre tap 26a is connected to another end, second end of arc discharge lamp 24.
Detect the high-frequency current that flows through a winding 14a among the high frequency transformer 12a with current detector 28a.The representative current signal of representing the electric current that current detector 28a is detected is sent to control device, control circuit 30a for example, and more precisely, send the error amplifier 32a among the control circuit 30a to, and also the base value value signal from the benchmark numerical value generation circuit 34a among the control circuit 30a is flowed to error amplifier 32a.Error amplifier 32a produces and to be illustrated in the error signal of representing difference between current signal and the base value value signal, and this error signal is transported to pwm control signal generation circuit 36a among the control circuit 30a.Pwm control signal generation circuit 36a produces the pwm control signal based on error signal.Pwm control signal is flowed to drive signal generator 38a, from drive signal generator 38a drive signal is flowed to each semiconductor switch device the inverter 10a, so that the numerical value of high-frequency current and the corresponding mode of base value value signal are controlled the turn-on cycle of each semiconductor switch device.
As mentioned above, two power pack, the power pack 2a and the 2b that promptly have identical structure and capacity are connected in parallel with load 24 for supplying electric power to load 24.
As mentioned above, in order to satisfy the power capacity requirement that the user proposes, a plurality of power pack with same capacity are to use under the situation that its output is connected in parallel.In such connection, the power magnitude that must balanced each power pack be produced.Usually, detect power magnitude that each power pack exports and the inverter of controlling that power pack so that the power magnitude that is detected equals to pre-determine the power magnitude that power pack will produce.Yet, in present case, owing to have the power pack 2a of same structure and the electrical characteristics of 2b can think it is consistent basically, therefore prepare to detect the current values that inverter 10a and 10b are exported, and control inverter 10a and 10b are so that the current values that is detected equals predetermined reference value, and predetermined reference value is identical to power pack 2a and 2b.
So in such connection, between power pack 2a and 2b, do not need for control inverter 10a and 10b sends and received signal.Further, if one of them power pack of power pack 2a and 2b breaks down, so by just can recover the power-supply device operation with the out of order power pack of new replacement.
In such a case, if having different numerical value from benchmark numerical value generation circuit 34a among power pack 2a and the 2b and the fiducial value signal of 34b, the power output amplitude of power pack 2a and 2b will have nothing in common with each other so.In order to prevent this situation,, equivalent holding device is connected between benchmark numerical value generation circuit 34a and the 34b according to present embodiment.Equivalent holding device can comprise first and second circuits, for example equipotential circuit 40 and 42.
Specifically, as shown in Figure 2, benchmark numerical value generation circuit 34at and 34b comprise Zener diode 56a and 56b respectively, and its negative pole is for one+VccDC voltage is arranged and its positive pole couples reference potential, for example earthing potential.Negative pole-cathode voltage puts on error amplifier 32a and 32b as the fiducial value signal.The negative pole of Zener diode 56a and 56b is coupled in together via equipotential circuit 40, and positive pole is coupled in together via equipotential circuit 42.
Because such connection, negative pole-cathode voltage of the negative pole-cathode voltage of Zener diode 56a and Zener diode 56b is equal fully each other.Therefore, power pack 2a and the identical power amplitude-frequency of 2b output.
In described execution mode, detect the numerical value of the high-frequency current of inverter 10a and 10b.We can consider to detect the DC electric current from outlet side rectification circuit 18a and 18b, but such DC electric current has very significantly, so must use big current detector in order to detect such electric current.On the contrary, be smaller from the high-frequency current of each inverter 10a and 10b, so AC current detector 28a and 28b can be than low capacities.
The industrial AC voltage that puts on input side rectification circuit 4a and 4b can be the first industrial AC voltage and be any industrial AC voltage in the second about two times industrial AC voltage of the first industrial AC voltage.In some areas of using this power-supply device, the first industrial AC voltage can be 100V for example, and the second industrial AC voltage can be 200V.For power-supply device, any voltage in its two kinds of voltages that apply is connected voltage switch circuit 44 between input terminal 5a, 6a and input terminal 5b, the 6b (Fig. 1) according to the present invention in order to handle.
Specifically, input terminal 5a is via the switch of often opening 46 of a string combination in the voltage switch circuit 44, normally closed switch 48 and the switch 50 often opened and be connected to input terminal 6b.The contact of normally closed switch 48 and the switch of often opening 50 is connected with input terminal 6a, and the contact of normally closed switch 48 and the switch of often opening 46 is connected with input terminal 5b.Make switch 46,48 and 50 opening the switch 46 often opened and 50 o'clock closed normally closed switches 48, and the closed switch of often opening 46 and opened normally closed switch 48 such modes at 50 o'clock and move together.
When between power supply terminal 52 and 54, applying the industrial AC voltage of 200V, open the switch 46 often opened and 50 and closed normally closed switch 46.So just cause input side rectification circuit 4a and 4b to be connected in series between power supply terminal 52 and 54, therefore each circuit among input side rectification circuit 4a and the 4b is applied 100V voltage.When the voltage that applies between power supply terminal 52 and 54 is 100V, the closed switch of often opening 46 and 50, and open normally closed switch 48.Therefore so just cause input side rectification circuit 4a and 4b to be connected in parallel between power supply terminal 52 and 54, two voltages that input side rectification circuit 4a and 4b are applied all are 100V.
Under the situation of working voltage switching circuit 44, or in the area of using the industrial AC voltage of 100V amplitude, or can both use this power-supply device in the area of using the industrial AC voltage of 200V amplitude.
Fig. 3 represents the power-supply device according to second execution mode.Power-supply device and the arc welding machine of Fig. 3 use simultaneously.This power-supply device has and the structure the same basically according to the power-supply device of first execution mode.Therefore, for first execution mode in element and function is identical or similar elements or function adopt identical reference numerals and subscript, and they are not described in detail.
Power-supply device is in order to use simultaneously with arc welding machine, so secondary winding 16a in high frequency transformer 12a and 12b and the centre tap 26a on the 16b and 26b are connected respectively to workpiece 24W.Rectifier diode 20b among rectifier diode 20a among the outlet side rectification circuit 18a and the contact of 22a and the outlet side rectification circuit 18b and the contact of 22b are connected to the welding gun 24t of bonding machine together.In ripple device circuit 62 gradually, make the voltage increases on rectifier diode 20a and the 20b contact, and the voltage that is increased is applied to around the ozzle 24n of bonding machine welding gun 24t pilot arc can be produced between welding gun 24t and ozzle 24n, therefore can successfully begin arc discharge.
Should be noted that on the anodal joint of two rectifier diodes of outlet side rectification circuit in each power pack to be provided for connecting gradually ripple device circuit and some terminals that are connected welding gun, so chopper circuit 62 can be connected with any one power pack.
DC current detector 280a and 280b are configured between centre tap 26a and the workpiece 24W respectively and between centre tap 26b and the workpiece 24W, and the DC electric current representation signal of the DC electric current that expression DC current detector 280a and 280b are detected is sent to error amplifier 32a and 32b respectively.
When industrial AC voltage is 100V, inverter 10a and 10b are connected in parallel between the lead-out terminal of input side rectification circuit 4a, and when industrial AC voltage was 200V, inverter 10a and 10b were connected in series between the lead-out terminal of input side rectification circuit 4a.Thereby, can be configured to rectification or 100V or the voltage of 200V to input side rectification circuit 4a.
When applying the industrial AC voltage of 100V, because inverter 10a and 10b are connected in parallel, so the input voltage of inverter 10a and 10b equates.Therefore, the voltage by detecting inverter 10a and 10b and equate it is impossible according to the power output amplitude that the voltage control inverter 10a that is detected and 10b are provided power pack 2a and 2b.In such a case, give full play to current detector 280a and 280b and detect secondary winding 16a and the electric current of 16b and cooperating that flows through among high frequency transformer 12a and the 12b according to Current Control inverter 10a that is detected and 10b.
Two kinds of execution modes have used two power pack according to the present invention as described hereinbefore, but can use the power pack more than two, decide on the desired power capacity of user.Under these circumstances, prepare the even number power pack to form as the power subsystem of the power subsystem in the above-described execution mode with two above-mentioned power pack, the power pack that can move according to the effect of any industrial AC voltage in two kinds of different industrial AC voltage by voltage switch circuit 44 and 440 is connected in these power subsystems between the power supply terminal in parallel then.
Claims (4)
- One kind with the power-supply device that uses simultaneously with device of arc, comprising:A plurality of power pack with same capability, each above-mentioned power pack comprises:Be used for industrial AC power supplies is transformed to the AC of DC power supply to the DC converting means; Be used for resulting DC power conversion to the DC of high frequency electric source to the high frequency conversion device; Be used to make resulting high frequency electric source to change the transformer of voltage; Be used to make the high frequency electric source that obtains transformation to transform to the high frequency of DC power supply to the DC converting means; Be used for so that electric current with cross above-mentioned DC from this consistent sample loading mode control flows of the reference signal of reference signal generator to the electric current of high frequency conversion device or flow through the control device of above-mentioned high frequency to the electric current of DC converting means;Above-mentioned high frequency in above-mentioned each power pack is equipped with their output that is connected in parallel to the DC converting means; Make the said reference signal that reference signal generator provided in above-mentioned each power pack keep equating mutually by equivalent holding device.
- 2. according to the power-supply device of claim 1, wherein each said reference signal generation apparatus is equipped with reference potential side terminal and outlet side terminal, and above-mentioned equivalent holding device comprises first circuit that said reference current potential side terminal is linked together and second circuit that above-mentioned outlet side terminal is linked together.
- 3. according to the power-supply device of claim 1, wherein use at least one pair of above-mentioned power pack, above-mentioned at least one pair of power pack is equipped with and applies or an AC voltage or amplitude are approximately the pair of power source terminals of the 2nd AC voltage of two times of above-mentioned AC voltage amplitudes; Above-mentioned power-supply device further comprise be used for an above-mentioned AC voltage be applied to above-mentioned power supply terminal between the time, make in above-mentioned at least one pair of power pack above-mentioned AC to the input side of DC converting means be connected in parallel above-mentioned power supply terminal between, and above-mentioned the 2nd AC voltage be applied to above-mentioned power supply terminal between the time, make in above-mentioned at least one pair of power pack above-mentioned AC to the input side of DC converting means be connected in series in above-mentioned power supply terminal between switching device shifter.
- 4. according to the power-supply device of claim 1, wherein use at least one pair of power pack; When above-mentioned power-supply device comprises that further the above-mentioned AC that is used for putting on one of above-mentioned power pack at first voltage is to the DC converting means, make the above-mentioned DC in above-mentioned at least one pair of power pack be connected in above-mentioned AC above-mentioned in the above-mentioned power pack in parallel to the output of DC converting means to the input side of high frequency conversion device, and when second voltage that is approximately two times of above-mentioned first voltages puts on above-mentioned AC above-mentioned in the above-mentioned power pack to the DC converting means, make above-mentioned DC in above-mentioned at least one pair of power pack is connected in series in an above-mentioned power pack in the above-mentioned power pack to the input side of high frequency conversion device the above-mentioned AC switching device shifter to the DC converting means output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610075358 CN101056062A (en) | 2006-04-10 | 2006-04-10 | Power device of arc device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610075358 CN101056062A (en) | 2006-04-10 | 2006-04-10 | Power device of arc device |
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| Publication Number | Publication Date |
|---|---|
| CN101056062A true CN101056062A (en) | 2007-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610075358 Pending CN101056062A (en) | 2006-04-10 | 2006-04-10 | Power device of arc device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439669A (en) * | 2013-09-13 | 2015-03-25 | 罗伯特·博世有限公司 | Arrangement for operation of welding system |
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2006
- 2006-04-10 CN CN 200610075358 patent/CN101056062A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439669A (en) * | 2013-09-13 | 2015-03-25 | 罗伯特·博世有限公司 | Arrangement for operation of welding system |
| CN104439669B (en) * | 2013-09-13 | 2019-10-25 | 罗伯特·博世有限公司 | For running the device of welding system |
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