CN209006863U - A kind of straight-through protective device of the thyristor applied to industrial frequency electric resistance controller of spot welder - Google Patents
A kind of straight-through protective device of the thyristor applied to industrial frequency electric resistance controller of spot welder Download PDFInfo
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- CN209006863U CN209006863U CN201821085221.3U CN201821085221U CN209006863U CN 209006863 U CN209006863 U CN 209006863U CN 201821085221 U CN201821085221 U CN 201821085221U CN 209006863 U CN209006863 U CN 209006863U
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Abstract
The utility model discloses a kind of thyristors applied to industrial frequency electric resistance controller of spot welder to lead directly to protective device; including control panel, Current Transmit, DC power supply, silicon controlled rectifier (SCR) SCR and breaker NFB with shunt opening trip coil; the DC power supply is connect with control panel; the Current Transmit is linked into 1 side of welding transformer, and sampled signal accesses the simulation input mouth of control panel；The one end the silicon controlled rectifier (SCR) SCR is connect with breaker NFB, and the other end is connect with welding transformer；The shunt opening coil of the control panel output signal access breaker NFB.This protective device can effectively protect AC resistance mash welder because the half of thyristor breakdown, full breakdown, persistently the abnormal failures such as lead directly to due to further burn out welding transformer or even cause injury to personnel the case where, reduce the risk of equipment damage, save enterprise's production cost；Present apparatus structure is simple, high reliablity, at low cost.
Description
Technical field
The thyristor that the utility model relates to a kind of for protecting industrial frequency electric resistance controller of spot welder and welding transformer
Device belongs to welding field.
Background technique
1, the working principle of industrial frequency AC resistance mash welder traditional at present is by two thyristors of reverse parallel connection and welding
The primary windings connected in series of transformer is followed by, using trigger control device, making two thyristors respectively in the positive and negative of alternating current in power grid
Half cycle powers on, and changes the controlling angled a of thyristor, realizes the adjusting to the secondary output current of welding transformer.
2, industrial frequency AC electric resistance welding during the welding process, since abnormal conditions cause thyristor out of control straight-through or short circuit,
Although master control set can detecte short-circuit condition and alarm, thyristor, which is under constant conduction state, cannot be played effectively
It protects and cuts off breaker in time.
Utility model content
Purpose of utility model: in order to overcome the deficiencies in the prior art, the utility model provide a kind of design rationally,
Reliable performance, significant effect lead directly to protective device using the easy thyristor applied to industrial frequency electric resistance controller of spot welder.
Technical solution: to achieve the above object, the technical solution adopted in the utility model are as follows:
A kind of straight-through protective device of the thyristor applied to industrial frequency electric resistance controller of spot welder, including control panel, electric current are mutual
Sensor CT, DC power supply, silicon controlled rectifier (SCR) SCR and the breaker NFB with shunt opening trip coil, the DC power supply and control panel
Connection, the Current Transmit are linked into 1 side of welding transformer, and sampled signal accesses the simulation input mouth of control panel；
The one end the silicon controlled rectifier (SCR) SCR is connect with breaker NFB, and the other end is connect with welding transformer；The control panel output
The shunt opening coil of signal access breaker NFB.
Preferred: the control panel includes power supply processing unit, analogy signal processing unit, display unit, CPU processing list
Member and I/O-unit, the power supply processing unit are connect with analogy signal processing unit, CPU processing unit respectively, the CPU processing
Unit is connect with power supply processing unit, analogy signal processing unit, display unit and I/O-unit respectively；The current transformer
The sampled signal of CT is linked into analogy signal processing unit.
Preferred: the I/O-unit includes temperature detect switch (TDS) input one, temperature detect switch (TDS) input two, temperature detect switch (TDS) output one, temperature
Control switch output two, straight-through protection output, the temperature detect switch (TDS) input one, temperature detect switch (TDS) input two, temperature detect switch (TDS) output one, temperature
Control switch output two, straight-through protection output are arranged on CPU processing unit.
The utility model compared with prior art, has the advantages that
This protective device can effectively protect AC resistance mash welder because of half breakdown of thyristor, full breakdown, persistently lead directly to etc.
Abnormal failure and further burn out welding transformer or even the case where cause injury to personnel, reduce the risk of equipment damage, save
Enterprise's production cost；Present apparatus structure is simple, high reliablity, at low cost.
Detailed description of the invention
Fig. 1 is protective device systematic schematic diagram；
Fig. 2 control panel functional block diagram；
Fig. 3 IGBT group and current acquisition waveform diagram.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the utility model is furtherd elucidate, it should be understood that these examples are only used for
Bright the utility model rather than limitation the scope of the utility model, after having read the utility model, those skilled in the art
Member falls within the application range as defined in the appended claims to the modification of the various equivalent forms of the utility model.
A kind of straight-through protective device of the thyristor applied to industrial frequency electric resistance controller of spot welder, as shown in Figs. 1-2, including control
Making sheet, Current Transmit, DC power supply, silicon controlled rectifier (SCR) SCR and the breaker NFB with shunt opening trip coil, the DC electricity
Source is connect with control panel, and the Current Transmit is linked into 1 side of welding transformer, and sampled signal accesses the mould of control panel
Quasi- input port；The one end the silicon controlled rectifier (SCR) SCR is connect with breaker NFB, and the other end is connect with welding transformer；The control
The shunt opening coil of making sheet output signal access breaker NFB.
As shown in Fig. 2, the control panel include power supply processing unit, analogy signal processing unit, display unit, at CPU
Reason unit and I/O-unit, the power supply processing unit are connect with analogy signal processing unit, CPU processing unit respectively, the CPU
Processing unit is connect with power supply processing unit, analogy signal processing unit, display unit and I/O-unit respectively；The Current Mutual Inductance
The sampled signal of device CT is linked into analogy signal processing unit.The I/O-unit include temperature detect switch (TDS) input one, temperature detect switch (TDS) it is defeated
Enter two, temperature detect switch (TDS) output one, temperature detect switch (TDS) output two, straight-through protection output, the temperature detect switch (TDS) input one, temperature detect switch (TDS) are defeated
Enter two, temperature detect switch (TDS) output one, temperature detect switch (TDS) output two, lead directly to and output is protected to be arranged on CPU processing unit.In the mistake of welding
The current signal of 1 side of welding transformer is acquired in journey by Current Transmit, while this current signal is transmitted to control panel
Analog channel, current signal is transmitted to CPU element after analogue unit is handled and is further processed；In addition master control borad is settable
Operating time of protection, the two issue decision instruction by CPU after the logical operation of CPU element, determine whether control panel exports guarantor
Protect signal.
A kind of thyristor applied to industrial frequency electric resistance controller of spot welder leads directly to the detection method of protective device, and DC power supply connects
It is connected to the power input of control panel, provides power supply for control panel；Current Transmit is linked into 1 side of welding transformer,
Sampled signal accesses the simulation input mouth of control panel, and output signal accesses the shunt opening coil of breaker, for controlling cutting power frequency
The input power of AC resistance mash welder.1 side of welding transformer is acquired by Current Transmit during the welding process
Current signal, while this current signal being transmitted to the analog channel of control panel, current signal is transmitted to after analogue unit is handled
CPU element is further processed；In addition the settable operating time of protection of master control borad, the two after the logical operation of CPU element by
CPU issue decision instruction, determine control panel whether output protection signal.
Fig. 3 shows IGBT group and current acquisition waveform, using the trigger control device of welding machine, makes two thyristors point
Do not power in the positive-negative half-cycle of alternating current, change the controlling angled a of thyristor, realizes the control to thyristor output different wave
System.For Current Transmit by the acquisition to 1 side current signal of welding transformer, the analog signal for sending control panel to is logical
Road, after analogue unit is handled, the positive-negative half-cycle of AC signal respectively forms one group of rectangular pulse signal, does logic for CPU element
Calculation process.
Present apparatus operating time of protection can be arranged by keyboard and pass through display unit real-time display, and CPU element passes through reading
It takes the setting value of display unit to be further processed, and issues and sentence after CPU element calculation process with collected pulse signal
Severed finger enables, and determines whether output protection signal cuts off welding machine electric power to control panel in time.
The above is only the preferred embodiment of the utility model, it should be pointed out that: for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (3)
1. a kind of thyristor applied to industrial frequency electric resistance controller of spot welder leads directly to protective device, it is characterised in that: including control
Plate, Current Transmit, DC power supply, silicon controlled rectifier (SCR) SCR and the breaker NFB with shunt opening trip coil, the DC power supply
It is connect with control panel, the Current Transmit is linked into 1 side of welding transformer, and sampled signal accesses the simulation of control panel
Input port；The one end the silicon controlled rectifier (SCR) SCR is connect with breaker NFB, and the other end is connect with welding transformer；The control
The shunt opening coil of plate output signal access breaker NFB.
2. leading directly to protective device, feature applied to the thyristor of industrial frequency electric resistance controller of spot welder according to claim 1
Be: the control panel includes power supply processing unit, analogy signal processing unit, display unit, CPU processing unit and IO mono-
Member, the power supply processing unit are connect with analogy signal processing unit, CPU processing unit respectively, the CPU processing unit difference
It is connect with power supply processing unit, analogy signal processing unit, display unit and I/O-unit；The sampling of the Current Transmit is believed
Number it is linked into analogy signal processing unit.
3. leading directly to protective device, feature applied to the thyristor of industrial frequency electric resistance controller of spot welder according to claim 2
Be: the I/O-unit includes temperature detect switch (TDS) input one, temperature detect switch (TDS) input two, temperature detect switch (TDS) output one, temperature detect switch (TDS) output
Two, protection output, the temperature detect switch (TDS) input one, temperature detect switch (TDS) input two, temperature detect switch (TDS) output one, temperature detect switch (TDS) output are led directly to
Two, protection output is led directly to be arranged on CPU processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821085221.3U CN209006863U (en) | 2018-07-10 | 2018-07-10 | A kind of straight-through protective device of the thyristor applied to industrial frequency electric resistance controller of spot welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821085221.3U CN209006863U (en) | 2018-07-10 | 2018-07-10 | A kind of straight-through protective device of the thyristor applied to industrial frequency electric resistance controller of spot welder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209006863U true CN209006863U (en) | 2019-06-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821085221.3U Active CN209006863U (en) | 2018-07-10 | 2018-07-10 | A kind of straight-through protective device of the thyristor applied to industrial frequency electric resistance controller of spot welder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209006863U (en) |
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2018
- 2018-07-10 CN CN201821085221.3U patent/CN209006863U/en active Active
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