TW434084B - AC/DC welding machine - Google Patents

Abstract

An AC/DC welding machine has a primary coil and a secondary coil which has an additional lead in the middle. The first series circuit has the first and the second controlled rectifiers connected in the same polarity, and their junction is connected to the first end of the secondary coil. The second series circuit has the third and the fourth controlled rectifiers connected in the same polarity, and their junction is connected to the middle lead of the secondary coil through the welding load. The first series circuit and the second series circuit are parallel with the same polarity, and they are parallel with a reactance component. The second end of the secondary coil is connected to the junction of the first and the third controlled rectifiers through the fifth controlled rectifier. The five controlled rectifiers are controlled by a control circuit. The AC or DC welding modes are selected by a switch. In the AC welding mode, when the first end of the secondary coil induces a polarity of the voltage, the current will flow through the first controlled rectifier, the reactance component, the fourth controlled rectifier and the welding load in order; when the first end of the secondary coil induces the opposite polarity of the voltage, the current will flow through the welding load, the third rectifier, the reactance component and the second controlled rectifier in order. In the DC welding mode, when the first end of the secondary coil induces a polarity of the voltage, the current will flow through the first controlled rectifier, the reactance component, the fourth controlled rectifier and the welding load; when the first end of the secondary coil induces the opposite polarity of the voltage, the current will flow through the fifth controlled rectifier, the reactance component, the fourth controlled rectifier and the welding load.

Description

4 3 4 Π 8 4 V. Description of the invention (1) The present invention relates to a welding machine that can be used for both AC welding machines and DC welding machines. ^ m is said to be found in the official Shi Gong Zhao 5 Bu 43 218, a part of which is shown in the welding machine of the j-th figure. In FIG. 1, the AC voltage of the commercial AC power source 2 is applied to the primary coil 6P of the transformer 6 via the power switch 4 and the transformer 6 has a secondary coil 6S. In addition to the transformer 6, the fusion splicer is provided with a sluice fluid bridge g circuit 8, a reactor i 0, 4 changeover switches 1 2, H, 1 and a base material 22. Item 20, the bridge circuit 8 is provided with gate fluids 8a and 8 connected in series with the same polarity, and gate fluids 8c and 8d connected in series with the same polarity. Cathode connection of closed fluid 8 grade 8c Z fluid core and 8 (1 anode are connected together. The gate fluid point is connected to the secondary coil & one end 6a. The gate fluid "and the cathode connection point of 8c 'is connected at One end of the reactor 10 and the other end of the reactor 10 are connected to the contactors 12a of the changeover switch 12. The contact 1 2b of the knife-change switch 12 is connected to the interconnection point of the brake fluids 8b and 8d. The switch i 2 is also provided with a contact 丨 2c, and this contact 丨 2 is connected to the switch 1 4 of the contact 1 4 c. The switch 1 4 of the contact 1 4b is connected to the brake fluid 8 to 8 Point, the contact 1 of the switch 1 4 is connected to the base material 2 2. The torch 2 0 is connected to the contact 16 of the switch 16 6 a 〇 The contact 16 of the switch 16 is connected to the switch The contact 8 of 18 is connected to the other end 6b of the secondary coil 6S at the same time. The contact 16C of the changeover switch 16 is connected to the connection point of the brake fluids 8b and 8d. The contact of the changeover switch 18 is 1 8b Open, contact 1 § c connected to gate fluid 8 c

4340 84 V. Interconnection point of invention description (2) and 8d. Transfer switches 1 2, 1 4, 16 and 18 are mechanically linked. 'When contact 12 2a of transfer switch 12 contacts contact 1 2b, contacts of other transfer switches 1 4, 16 and 18 14a, 16aA, 18a are in contact with contacts 14b, 16b, and 18b. Similarly, when the contact 12a of the changeover switch 12 contacts the contact 12c, the contacts 14a, 16a, and 18a of the other changeover switches 14, 16 and 18 also contact the contacts 14c, 16c, and 18c. The gate fluids 8a, 8b, 8c and 8d are controlled by gate fluid control circuits (not shown). When this welding machine is used as an AC welding machine, the contacts 12a, 14a, 16a, and 18aii of the diverter switches 1, 2, 14, 16 and 18 are connected to the contacts 12b, 14b, 16b, and 18b. When a positive voltage is induced at one end 6a of the secondary coil 6S, the control circuit conducts the gate fluids 8a and 8d, and the current flows from one end 6a through the gate fluid 8a, the reactor 10, the switch 12, the gate fluid 8d, and the switch 1 4. The base material 22, the torch 20 and the switch 16 are flowed to the other end 6b of the primary coil 6 of the transformer 6. When a positive voltage is induced at the other end 6 b of the secondary coil 6k, the control circuit turns on the gate fluids 8b and 8c, and the current flows from the other end 6b through the cut μ μ 16, torch 20, base material 22, and switch 14 , Closed fluid, closed 10, switch 12 and gate fluid 8b flow to one of the secondary coils 6S ^ 6a. When this welding machine is used as a DC welding machine, the contacts 12a, 14a, 16aA, 18ait of the changeover switches 2, 14, and 18 are connected to the contacts 12c, Hc, 16c, and 18c. When a positive voltage is induced at one end 6a of the secondary coil 6S, the sluice fluid control circuit conducts the sluice fluids 83 and 8d, and a current flows from one end 6a 'of the secondary coil through the sluice fluid 8a, the reactor 10, the switch ι2, i4, mother

--- *-* 4 3 4-0 84 V. Description of the invention (3) Material 22, torch 20, switch u, go to the other end of secondary coil 6S. The gate fluid switch 1 8 ′ oozes a + t surface, and a positive voltage is induced at the other end 6 b of the secondary coil 6S. The gate & body control circuit causes the gate fluid 8 (; and 8d to conduct current from the other end. Through the switch i 8, the brake fluid 8 c, and the reactor! 〇, the switch 1, 1, 4, the base material 2 2, the lamp 20, the switch 16 and the brake fluid 8 b, flow to the primary coil 6 S One end 6 a. As mentioned above, the AC and DC actions of this refining machine are switched using the switches 12, 14, 16 and 18, so if you use the switches of this welding machine for a long time, 1, 2, 14 , 16 and 18 will be switched countless times' and these contacts will be damaged. At the same time, these switches 12, 12, 4, 16 and 18 will be supplied with torches 20 and base materials 2 2 has a large main current, so it is necessary to use a large switch with a large current capacity. Therefore, when the switch 12, 14, 16 and 18 are installed on the operation panel of the welding machine casing, the panel will be large. The fusion splicer will also be very large β The AC / DC fusion splicer of the present invention has a transformer. The secondary coil. The primary coil is connected to a commercial AC power supply. Here, the fusion machine is equipped with a first series circuit of first and second control rectifiers connected in series with the same polarity. Phases of the first and second control rectifiers & quot The interconnection point is connected to the first end of the first secondary coil. Here, the welding machine is equipped with a second series of ° -connected circuits of the third and the beryllium-type rectifiers with the same polarity. The interconnecting points of the forged rectifier are connected to the second end of the first secondary coil through a fusion load. The first and second series circuits are connected in the same connection. Current circuits are connected in parallel to the first and second series circuits.

C: \ Program Files \ patent \ FCP-9055.ptd Page 7 Γ '43 40 8 4 V. Description of the invention (4) The flow path is controlled by the control component. The first to the other complete transformers also have a second secondary coil. The 1st end of the 2nd end of the short 1 secondary coil. When the secondary line is connected to the second end and induces a voltage of -square polarity, the voltage of the same polarity can be induced in the i: th part of the secondary coil. This mode selects the Z-mode mode selection switch in the first-end mode of the second line and the DC-connector mode. Please note that the type selection switch i pendulum: t has a large current value through which the main current passes. When the voltage of the first polarity should be output from the terminal 模 1, the control system ί ί flows through the current path in sequence from the first control rectifier, and welds the load to the fourth rectifier. Conversely, when a voltage of the second polarity is induced at the first end of the first secondary coil, the current flows from the fusion load in order, through the first male rectifier, the current path, and the second control rectifier. When the DC fusion splicer mode is selected by the mode selection switch, if a voltage of the first polarity is induced at the first end of the first secondary coil, the control member controls the first to fifth control-type rectifiers so that the current flows from The first control type rectifier 'sequentially flows a current path, a first rectifier type rectifier, and a fusion load. Conversely, when a voltage of the second polarity is induced at the first end of the first secondary coil, the current flows from the first rectifier, the current path in sequence, the first rectifier, and the welding load. The control component may contain the first drive for the first and fourth control rectifiers C: \ Pf〇gram Files \ patent \ FCP-9055.ptd Page 8- '4340 84 V. Description of the invention (5) actuator, The second driver for the second and the second running rectifiers, and the third driver for the fifth control rectifier. In AC fusion splicer mode, the first and second mediators are operational. In the DC grafting machine mode, the first and third mediators are enabled. In the two modes of AC fusion splicer and DC splicer, when a voltage of the first polarity is induced at the first end of the second line, the first driver turns on the fourth and fourth control rectifiers. In the fusion splicer mode, when a voltage of the second polarity is induced at the first end of the secondary coil, the first-type rectifier is turned on. The second driver is in the AC fusion splicer mode. When a voltage of the second polarity is induced at the end of the first secondary line, the second and third controls are turned on. When the third driver is in the DC fusion splicer mode, when a voltage of the second polarity is induced at the first end and the second end, the fifth control type is adjusted. Introduction FIG. 2 shows that an AC / DC fusion splicer according to an embodiment of the present invention is provided with commercial AC power supplied from a commercial AC power source 30, and voltage supply terminals 32a to 32b of a commercial AC voltage of a Z tower. Single-phase these voltage supply terminals 32 stages 32b # 'via the primary coil 36P of the power switching transformer 36 »This transformer 36 also has a secondary ^ This secondary coil 36S has an intermediate tap T» When it is at the first end of the secondary coil 36S When 36a senses a positive voltage, the second end 36b senses the lowest voltage, and the middle tap τ senses the voltage between the two. When negative electricity is induced at the first end 36a of the secondary coil 36fe ^

Γ 'Λ3 4.0BΛ V. Description of the Invention (6)-When ′, the highest positive voltage is induced at the second end 3 6 b, and the middle tap τ senses the voltage between the two. Therefore, the secondary wire S36S is equivalent to two secondary coils 36S1 and 36S2 wound with the same polarity in series. This AC / DC fusion splicer is provided with a bridge circuit 38. This bridge circuit 38 is provided with first and second control type rectifiers connected together with the same polarity, for example, the first by the brake fluids 38a and 38! The series circuit β, that is, the anode of the gate fluid 38a is connected to the cathode of the gate fluid 38b. This bridge circuit 38 is also provided with third and third-type rectifiers connected to the same polarity, for example, a second series circuit composed of thyristors 38c and 38d. That is, the anode of the gate fluid 38c is connected to the cathode of the gate fluid 38d, and the first and second gate fluid series circuits are connected in parallel with the same polarity. That is, the cathodes of the closed-flow 38-level gate fluid 38c are connected together, and the anodes of the gate fluid 38b and the gate fluid 38d are connected to the first and second gate fluid circuits, and a current f plate is connected in parallel, for example, reactance器 40。 40. That is, the reactor 40 is connected between the anodes of the closed circuit / 3838 '. This reactor 40 makes each thyristor Ϊ3 easier to be turned off, and also has a smoothing effect. It is also possible to arrange a line through which a current can flow between the cathode of the gate fluid 38c and the anode of the closed fluid chamber. The first end n 381 and Ming 3 are connected to each other at the secondary coil 36s ^ the first end portion 36a. The gate fluid 38 and iodine 38d are connected to each other to the base material 4 which constitutes a welding load. The point is that when the torch 44 is connected to the secondary coil and the negative Λ% base material 42 is asked, the torch 44 is connected and the second control 36 is connected to the second end 36b of the fifth control type.

434084 V. Description of the invention (7) Rectifier, for example, anode of brake fluid 46. This gate fluid is at the cathode of the gate fluids 38a and 38c. The cathode connection is preferably an insulating type. The insulating type sluice fluid includes a metal base surrounded by a frame-shaped shell, and a sluice wafer disposed on the metal base. Insulation type sluice; J 38-3, 8-stage 4 6 can be placed together in a cooling fan device (not shown, which can reduce the overall volume of the welding machine. '' 38d and 46 of these sluice fluid 38a Gate fluid control circuit 48 Two gate driving signals “0, = flow 8 = and 38d” which constitute a part of control circuit 48, such as trigger signals. Similarly, the gates of gate fluids 38b and 38c are composed of The control unit 48, which is a part of the control circuit 48, supplies control signals, such as a trigger signal. The gate of the gate fluid 46 is supplied by the drive unit 54 in the control circuit 48, such as a trigger signal. The commercial AC power supply supplying the trigger signal is synchronized, and a synchronization signal is supplied from the synchronization circuit 56 constituting a part of the control circuit 48 to each drive unit 50, 52, and 54. The input side of the synchronization circuit 56 is connected to the voltage supply terminals 32a and 32b. To generate a synchronization signal synchronized with the input commercial AC voltage. In order to make the main current of a predetermined value circulate in the base material 42 of the torch 44, the current setting device 58 'to a part of the control circuit 48- Each drive unit 50, 52, and 54 supplies a main current setting signal. The main current setting signal can be operated by a user to make it a desired value. The specific structure of each drive unit 50, 52, and 54 is well known, so it is explained in detail be omitted.

4 3 4- ^ 84 V. Description of the invention (8) Each drive unit 50, 5 2 and 5 4 can respond to the signals from the AC fusion splicer and the DC fusion splicer sent by the switching device 60 that constitutes the control circuit 4 8-part. . The drive unit 50 'for the brake fluids 38a and 38d can be used to drive the brake fluids 38a and 38d when either one of the AC welding signal and the DC welding signal is supplied from the switching device 60. On the other hand, the drive unit 52 can act only when the AC welding machine signal is supplied, and can drive the brake fluid 38 to 38d. Similarly, the 'driving unit 54 is only activated when a DC welding machine signal is supplied' and can drive the brake fluid 46. Switching device 60 is equipped with a splicer mode selection switch 6. This mode selection switch 62 can be selected, the splicer becomes the AC fusion splicer mode of the AC splicer operation, and the splicer becomes the DC melt splicer type of the DC splicer operation. The switch 62 is provided with a movable contactor 62a and a fixed connection 62c. The switching device 60 generates an AC fusion splicer signal when the contactor 62a contacts the contact 62b, and generates a DC fusion splice when the contactor 62a contacts the contact 62c. Machine signal. This welding machine mode selection switch 62 is only to generate an AC welding machine signal and a DC welding machine signal at the switching device 60, and is not used to control the main current flowing through the base material 42 and the torch 44. Therefore, a small switch with a smaller current capacity can be used for the welding machine mold switch 62. Here, as the panel is equipped with a mode selection switch 62, the overall size of the welding machine will also be J =. At the same time, 'in the AC fusion splicer mode and the DC fusion splicer mode selection switch 62, there will not be any abrasion: the door is frequently cut ^ this configuration of fusion splicing' can make the movable contact ir of the mode selection switch 62 fixed by the / Select t to select the AC melting splicer mode and use it as an AC custom splicer. Due to the choice of the school alumni, the switching device 60 will switch

C: \ Program Fi Ies \ £ jatent \ FCP-905yptd 5. Description of the invention (9) The signal of the AC fusion splicer is supplied to the drive units 50 and 52. Because the drive unit 50 should have a fusion splicer signal, the brake fluid can be triggered in 38 stages 38d of the brake fluid at the input AC voltage phase angle of the main current of the required magnitude at the positive standby half cycle of the input AC voltage. As a result, the sluice fluid 38a is turned on in the interval shown by diagonal lines in Fig. 5 (a), and the sluice fluid 38d is turned on in the interval between (d) of this figure. Because the non-driving unit 52 is supplied with an AC fusion splicer signal, the gate fluid 38bA 38ce is triggered by the phase difference of the current at each half cycle of the negative AC voltage, and the gate current is shown in FIG. 5 (b ) Is turned on in the interval shown by the diagonal line, and the gate Λ is turned on in the interval shown by the diagonal line. Flying the picture (c) Lansuo also has a circuit operation that is not shown in the third picture when the AC welding machine is selected. The secondary coil 36S ^ is the third tap τ is positive potential, and the gate fluid 38 level 38 (1 is located in the middle of the first end 36a, through the gate fluid 38a, the reactor 40, and the current 42 and the torch 44 flow to the middle tap τ. And the middle ^ f body 38 ^: when the potential of the first end 36a of the secondary coil 36S is a positive potential, the current is triggered by the middle tap τ flows through the '7 fluid 38b and the gate fluid 38c, the reactor 40 and the gate fluid 38b to the lamp / forming base material 42 and the first end portion 36a. Therefore, the base material 42 and the torch "fj = 36 'AC welding can be performed. When the AC current flows in the waveform mode of the gate fluid 46 in Figure 5 (e), the gate fluid 46 does not conduct. Therefore, ^ is not added to the diagonal line of the AC fusion f. Mujia indicates the gate fluid conduction.

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Page 13

434084 V. Description of the invention (10) '1 When the ϋsolvent m splicer operates as a DC splicer, the contact of the switch 62 ί contact 62C' selects the DC glare splicer mode. Thereby, the switching f is set to 60 to supply the DC splicer signal to the drive units 50 and 54. The driving single 2 I inputs the positive half-cycle of the AC voltage and triggers the sluice fluid 38 stages 38d through the required phase angle of the current = current. As a result, the positive half cycles of 2 t / graph s (a) are shown by diagonal lines, and the gate ΐ is turned on by the gate fluid 38d between the positive half diagrams of (d) and half-cycles. The driving unit 50 also triggers the gate fluids 38aA38d at a phase angle that can pass the required current during the negative half cycle, but the gate fluid 38a will not conduct as described later. At each negative input AC voltage i ΐ ΐ ^, the moving unit 54 contacts at a phase angle at which a desired main current can flow, and closes 46. Therefore, for example, in the interval shown by oblique lines in each negative half cycle shown in FIG. 6 (i), the closed fluid 38d is turned on, and the interval shown by oblique lines in each half cycle not negative in (e) The gate fluid a is turned on. Therefore, when the DC welding machine mode is selected, this welding operation is shown in the figure. When the secondary line 圏 3 is the i-th end of the heart, the position is the fourth. The middle tap τ is the positive potential, and when the sluice fluid 38 level 38d is triggered, the current Φ of the first end 36a of the coil 36S passes through the brake. Fluid 38a, electrical appliance '1: The body 38d, the base material 42 and the torch 44 flow to the middle tap τ 二 二 Ϊ ^ The potential of the first end _ is higher than that of the middle tap T and the first end 36a fj the second end The portion 36b is in a state of a lower potential on the anode side than on the cathode side by asking the fluid clang, 〇, and the current 疋. Therefore, when the fluid H is closed,

43AO 8 4 V. Description of the invention (11) The trigger will not be conducted. In this way, during the half cycle of the DC welding machine or the drawing and the negative half cycle, the electricity of the base material 42. The positive half cycle of the AC voltage becomes the DC welding machine operation. The torch 44 has a positive potential. Welding again, the turbidity of Figure 6 (b) and Figure 6 (c) is reported, but the waveforms of these gate fluids in the DC gate fluids 38b and 38c are not marked with oblique lines. . The M machine will not be turned on at the time of M '. Therefore, as explained above, the dazzle and DC welding machines of the present invention are used. In addition, as an AC welding machine, a small, small-capacity mode in: current flow path, pigs can be used. Yundong can reduce the overall volume of the welding machine by using the "$ 关". If insulated gate fluids are used, & equal gates ::: But fan device ’can therefore further weld the welding machine Ή :. In addition, the above embodiment can be modified in various ways. For example, the anode of the gate fluid 38a and the cathode of the gate fluid 38b are connected, but the anode of the 接 阳极 Ϊ 抓 fluid grasp can also be connected. At this time, the fluid 38c should be connected to the anode of the gate fluid and connected to the gate fluid, and the anode of 38c and the gate of the fluid 38 iodine 38 (1. The anode of the body 46 is connected to the anode of the gate fluid 38a The cathode is connected to the second end 36 b of the secondary coil 36s. At the same time, the middle tap τ is formed on the secondary coil 36s in the above embodiment, but the second coil 36 and the second coil 36 may be connected with the same polarity. §1 and 36s2 (Figure 2) are replaced in series. In this way, when a voltage of a certain polarity is induced in one of the terminals of the second secondary coil 36 ^, the second secondary coil

C: \ Program Fi Ies \ patent \ FCP-9055.pttl Page 15 434084 V. Description of the invention (12) "-~ · _____ = 6S2 is connected to the voltage of the second secondary coil "" 之 山 the same polarity voltage . At this time, the terminal of the terminal senses the positive and negative half cycles, and the second line 疋 f 流 stream dazzle machine mode, in the stream fusion machine mode 'only in the negative coil: there will be "pass , There will be a current through. Therefore, in the second phase ^ 2 secondary coil 36S2 ® 36sm fe Λ Λ f ^ ^, this point can be eliminated in the AC welding machine mode and the second attack sgrqftCMt »” Star stream pick-up mode, change the connection method of the first ^ first-person line 圏 36S1 and 36S2, with the same polarity Jiang Bu, n and the common pick-up mode together two and two coils 36S1 and 36S2 When the above 1st and 2nd & f AC fusion splicer modes are connected in series, the two coils 36S1 and 36S2 of 乩 笫 1 and 2 are connected in parallel with the same polarity, so that the current of the Ϊpositive flute flows through the second and half cycles. 2 secondary coil 36s2. So connected: When the second two coils 36SI and 36S2 use the same thick wire, the utilization efficiency of the second secondary coil 36S2 can also be improved. At the same time, the reactor 40 may also be provided between the interconnection point of the gate fluids 38c and 38d and the base material 42 instead of being connected in parallel with the series circuit of the gate fluids 38c and 38d. At this time, a current path is formed between the cathode of the gate fluid 38c and the anode of the gate fluid 38 (1. Circle

C: \ Program Files \ patent \ FCP-9055.ptd Page 16! 434084 Brief Description of Drawings Figure 1 is a block diagram of a conventional AC / DC welding machine. Fig. 2 is a block diagram of an AC / DC welding machine according to an embodiment of the present invention. Fig. 3 is an operation explanatory diagram when the welding machine of Fig. 2 is used as an AC welding machine. Fig. 4 is an operation explanatory diagram when the welding machine of Fig. 2 is used as a DC welding machine. Figures 5 (a) to 5 (e) show the voltage between the anode and cathode of each sluice fluid used in the welding machine of Figure 2 when the welding machine of Figure 2 is used as an AC welding machine. Illustration. Figures 6 (a) to 6 (e) show the voltage between the anode and cathode of each sluice fluid used in the welding machine of Figure 2 when the welding machine of Figure 2 is used as a DC welding machine. Illustration. Explanation of symbols 2 '30 ----- Commercial AC power supply 4, 34 ----- Power switch 6, 36 ----- Transformer 6P' 36P ----- Secondary coil 6S, 36S ---- Two Secondary coil 6a -------- one end of the secondary coil 6 b --------- the other end of the secondary coil 8 ---------- closed fluid bridge 8a , 8b, 8c, 8d ----- Brake fluid 10 --------- Reactor

C: \ Program Files \ patent \ FCP-9055.ptd Page 17 434084 Brief description of the diagram 12, 14, 16, 18 ----- Switch 12a, 14a, 16a '18a ----Contactor 12b, 14b, 16b, 18b ---- contacts 12c, 14c, 16c, 18c --- _contacts 20------ torch 22------ base material 3 2a, 32b-- --- Voltage supply terminal 36S1 ------ First secondary coil 36S2 ------ Second secondary coil 36a- ------ First end 36b of secondary coil --- ---- Second end of the secondary coil T --------- Intermediate tap 38 ---------- Bridge circuit 3 8a, 3 8b '38c, 3 8 d --- --Brake fluid 40------- Reactor 42------- Base material 44------- Blowtorch 46------- Brake fluid 48- -Control circuit 50 '5 2' 54 Drive unit 56------- Synchronization circuit 58------- Current setting member 60-Switching device 62-~ ------ Mode selection switch

C: \ Program Fi1es \ patent \ FCP-9055.ptd Page 18 434084 Simple illustration of the diagram 62a ------- contactor 62b, 62c ---- contact

IIHH C: \ Program Files \ patent \ FCP-9055.ptd Page 19

Claims (1)

Sixth, the scope of patent application ~ "--1. Two types of AC / DC fusion splicing machine, which are equipped with: A primary coil for supplying commercial AC power is provided, and the first and second terminals are provided. Transformer of the first secondary coil of P; constituted by first and first dimensioned rectifiers connected to the same polarity, and the mutual connection point of f is connected to the first series of the first end of the first secondary coil in the first series Circuit; consists of the third and silver-type rectifiers connected to the same polarity, the second series circuit connected to the second end of the first secondary coil through a welding load at the mutual connection point; The first and second series circuits are connected together in parallel with the same polarity, and are connected in parallel to the current path of the second series circuit; and a control circuit for controlling the first to the first system-type rectifiers; Ϊ t terminal device: It is provided that there is a second secondary coil connected to one end of the first secondary coil. When the second secondary coil has a voltage above the first end of the secondary coil, When a certain voltage is induced, a voltage of the same polarity will be induced. In the second-secondary coil, the end spot t-sulfur S 1 Λ04 04 A · i i i * «» Mite Xing 1 and 3 above 'Connected' between the connection points of the control rectifier The fifth control type rectifier is provided with the above control circuit, which is used to select the mode of the AC splicer mode and the first switch, the mode selection opener of the wind-type and direct / melon splicer mode, and the above-mentioned control circuit controls the above-mentioned 5th Controlled Rectification 434084 VI. Scope of patent application When the mode selection switch selects the AC welding machine mode, if a voltage of one polarity is induced at the first end of the first secondary coil, the current is sequentially controlled in the first control. Type rectifier, the current path, the fourth ^ -type rectifier, and the welding load flow, and when the other end of the first secondary coil induces a voltage of the other polarity, the current is sequentially connected to the welding When the load passes through the third rectifier, the current path, and the first rectifier, and the mode selection switch selects the DC welding machine mode, if the first end of the first secondary coil is When a voltage of one polarity is induced, the current is caused to flow through the first control rectifier, the current path, the forged rectifier, and the welding load in order, and the first When the terminal senses the voltage of the other polarity, the current is sequentially passed through the fifth control rectifier, the current path, the fourth rectifier, and The above-mentioned welding load flows. 2. The AC / DC fusion splicer as described in item 1 of the scope of the patent application, the control member includes: the first driver for the first and third silver-type rectifiers; the second driver for the second and third control-type rectifiers. 2 drives; and "the third mediator for the 5th control rectifier: in the AC fusion splicer mode" to make the first and second actuators operable, and in the DC and melter modes, The first and third drivers are operable. AC / DC fusion splicer as described in item 1 of patent application ’ Page 21: 434084 6. Scope of patent application When the first driver is in the two modes of the AC fusion splicer mode and the DC fusion splicer mode, if the first polarity of the first secondary coil is detected, the above-mentioned polarity is induced. When the voltage of the first and fourth ^ -type rectifiers is turned on, in the DC welding mode, if the voltage of the other polarity is induced at the first end of the first secondary coil, When the fourth rectifier is turned on, and when the second driver is in the AC welding machine mode, if a voltage of the other polarity is induced at the first end of the first secondary coil, the first The 2 and 3 control rectifiers are turned on. When the third driver is in the DC welding machine mode, if a voltage of the other polarity is induced at the first end of the first secondary coil, the first 5 The control rectifier is turned on. C: \ ProgramFiles \ patent \ FCP-9055.ptd page 22