CN203696217U - Structure of inverter air plasma cutting machine adopting single IGBT (Insulated Gate Bipolar Transistor) - Google Patents
Structure of inverter air plasma cutting machine adopting single IGBT (Insulated Gate Bipolar Transistor) Download PDFInfo
- Publication number
- CN203696217U CN203696217U CN201320785960.4U CN201320785960U CN203696217U CN 203696217 U CN203696217 U CN 203696217U CN 201320785960 U CN201320785960 U CN 201320785960U CN 203696217 U CN203696217 U CN 203696217U
- Authority
- CN
- China
- Prior art keywords
- cutting machine
- circuit board
- igbt
- cabinet
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model relates to an inverter plasma arc cutting machine adopting a single IGBT (Insulated Gate Bipolar Transistor). The cutting machine is divided into an upper-layer inner structure and a lower-layer inner structure on the whole, and three circuit board assemblies are adopted. An output fast recovery rectifying circuit board assembly and a single-IGBT circuit board assembly are opposite to each other in the horizontal direction and are positioned in front of a cooling fan, and thus the cooling and heat-dissipation requirements of high-power devices on the two circuit boards are met. Circuits, the circuit boards and the whole machine are reasonable in structural design and convenient to mount, so that the production efficiency is high, and the manufacture cost is low. The circuits and the whole cutting machine are unique in structural design, the cutting machine is small in size, light in weight and very convenient to carry, and the duty cycle of the cutting machine is higher when compared with other small inverter cutting machines.
Description
Technical field
The utility model relates to a kind of small-sized IGBT contravariant Air Plasma Arc Cutting Machine product, specifically a kind of direct current air Plasma Are Cutting Machine that adopts single tube IGBT inverter circuit and control circuit thereof to form.
Technical background
Current, the competition of CUT produce market is very fierce, not only be embodied in the advance and advantage of technology, also depend on to a great extent the outward appearance of cutting machine and structural design, the advance of manufacturing process, the height of production efficiency, the number of production cost, the aspect such as uniformity and reliability of product.
At present, on domestic and international market, the rated current of small-sized contravariant Air Plasma Arc Cutting Machine is normally designed to the level of 20 ~ 40A, domestic many this type of cutting machines adopt MOSFET pipe reverse control technology to make, MOSFET pipe inversion cutting machine, need to adopt a lot of MOSFET pipe electric currents that expands device in parallel, this just makes the circuit board size of cutting machine large, circuit board and complete machine structure complexity, also exists the problems such as product reliability is low, cost of manufacture is high simultaneously, over closer year, adopt the invert plasma cutter of single tube IGBT to become gradually the emphasis of this type of product development, because the current class of single tube IGBT is large, manage unlike MOSFET, need to adopt the mode of multitube parallel to expand the electric current of its device, therefore, the reliability of product is improved, simultaneously, the minimizing of this inversion electronic switching device quantity can make the circuit board size decreases of cutting machine, it is simple that circuit board and complete machine structure become, cost of manufacture and the technological level of product are also improved simultaneously, the problems that MOSFET multitube parallel technology exists are solved, advantage and the development prospect of single tube IGBT reverse control technology are embodied, although the CUT of small-sized single tube IGBT reverse control technology also has many products, but, different product manufacturing enterprises, due to the difference of design level, also there is larger difference in the performance such as structure and reliability of product.
For the CUT of MOSFET multitube parallel, its inner upper, middle and lower three control panels and complete machine layout structure of adopting, seems complicated and backward in technique; Adopt the cutting machine of single tube IGBT inversion, the internal structure design form of some employing single circuit boards, some employing upper and lower control panels of two plates and complete machine layout structure, compared with the CUT of MOSFET multitube parallel, obviously had larger technological progress; But, above-mentioned these inversion air plasma cutting machines, be subject to the restriction of the factor such as cutter circuit and internal structure design, power device radiating condition and cooling effect thereof, what make them its cyclic duration factor is difficult to do when compared with High-current output (as 40A) is very large, the shorter working time just there will be the protection of cutting machine heat, as the cyclic duration factor of many cutting machines only has 20 ~ 40%, so short clipping time, make many clients quite dissatisfied, the rated operational current of even a lot of machine 40A does not all reach; In addition, the inversion cutting machine of some single tube IGBT single circuit plate structures, because high power device heating is serious, even can burn out circuit board, and circuit board cannot be repaired, and causes producer or user's larger economic loss; Secondly; the cutting machine manufacturing enterprise quantity of China is many, and presents small and scattered feature, a little less than the strength due to enterprise; the production quantity of product is little; do not have ability to adopt automatic insertion device to realize automation or the large-scale production of cutting machine product, therefore, the production efficiency of product is low; technological level handwork level often; seeming backward, meanwhile, is also the unreliable hidden danger of having buried of product.
Although the Air Plasma Arc Cutting Machine kind that adopts single tube IGBT inverter control circuit to form is many, their circuit and cutting machine internal structure external structure form are also diversified, but, different circuit and structural design thinking thereof, the physical circuit form adopting and the mode of whole circuit arrangement are different, moreover, the performance indications of cutting machine comprise current/voltage scope and the corresponding cyclic duration factor thereof of output, the class of insulation, temperature rise, manufacture craft level, product reliability etc. also can show some obvious gaps, even under identical product parameters performance indications, due to the difference of physical circuit and cutting machine structure design aspect thereof, or the packing forms difference of the electronic devices and components that adopt, thereby the assembling of the components and parts such as circuit board, welding and characterization processes level, automaticities etc. also can be obviously different, this will make the size of this electronic product circuit board of contravariant Air Plasma Arc Cutting Machine, the convenience of installing when production, production efficiency, production cost, the costs of product etc. also can be significantly different, for example, if adopt the cutting machine of a large amount of automatic insertion devices and integrated circuit, these devices of welding equipment circuit board can adopt advanced person, efficiently, be suitable for automated production equipment in enormous quantities, so, can greatly improve the production efficiency of circuit board or product, reduce production costs, increase the competitiveness of product in market.
That is to say, the cutting machine that structure is different with circuit design, its technical parameter, serviceability, production efficiency, even product appearance and reliability and the market competitiveness etc. are that difference is larger.
Utility model content
It is a kind of that the purpose of this utility model is to provide
adopt the structure of the contravariant air plasma cutter of single tube IGBTaccording to the difference of current class, can be designed to 40A/96V(40%), 30A/92V(60%), 20A/88V(80%) etc. the product of multiple current class and specifications and models, not only volume is little, and lightweight, carry very convenient, the control circuit board of cutting machine is designed to three, and circuit board has all adopted plug-in unit device and automatic technology method to produce, the reasonable in design of the circuit of cutting machine and circuit board and complete machine, easy for installation, therefore production efficiency is high, cost of manufacture is low.
For achieving the above object by the following technical solutions:
A kind of
adopt the structure of the contravariant air plasma cutter of single tube IGBT, it is characterized in that: comprise rectification circuit plate, IGBT circuit board, master board, inversion main transformer, electric current output filtering reactor, cabinet, control transformer, baroswitch and electromagnetic gas valve, between various piece, carry out circuit connection by some pilots, cabinet inside is divided into, lower two-layer, wherein inversion main transformer, filter reactor, control transformer, compressed air baroswitch, electromagnetic gas valve is arranged on lower floor, rectification circuit plate, IGBT circuit board, master control circuit board is arranged on upper strata, rectification circuit plate and an IGBT circuit board left side, right positioned opposite, be positioned at the rear portion on upper strata the front in cabinet rear portion cooling fan, be convenient to fan coolling device, master control circuit board is positioned at the front portion on upper strata, master control circuit board below is provided with median septum and the isolation of lower layer elements device.
The parts of installing on the front panel of cabinet have: plastics front panel, work and power supply and hot guard mode indicator lamp, gas testing detect/cut change-over switch, output current regulator potentiometer, the quick out splice going splice assembly of gas-electricity one formula, workpiece clamp fast cable joint assembly, aviation socket; The parts of installing on the rear board of cabinet have: power supply line, power switch, compressed air intake interface, plastics rear board, cooling blower.
The utility model cutting machine adopts modular design concept, and main modular has: rectification circuit plate; IGBT circuit board; Master board; Inversion main transformer; Electric current output filtering reactor; Striking high frequency coupling reactor, cabinet etc., to the cutting machine of different current classes and cyclic duration factor requirement, can be by the different module specifications parameter of configuration, form the product of different output rated current and cyclic duration factor, make product seriation, for example, adopt IGBT devices little or different current classes and heat sink size thereof, can form the assembly that another is applicable to little electric current (as 20A, 30A) output; Change model and the parameter of fast recovery diode, coordinate and change corresponding radiator, can form other fast quick-recovery commutation diode and heat spreader module etc. thereof, certainly, the variation of these modules and parts, object is that the cost of manufacture of product and the specifications parameter of corresponding machine and performance indications are matched, and like this, the cutting machine of every kind of specifications and models could be realized optimized Cost Control Model.Meanwhile, also can make the cutting machine of different size have different costs, this has just promoted the market competitiveness of institute's development.
The utility model has not only adopted advanced reverse control technology, and has the advantages such as simple in structure, volume is little, lightweight, cost is low, production efficiency is high, manufacturing technology is advanced; By changing configuration specification and the parameter of disparate modules, can change the size of output current or power and the cyclic duration factor of cutting machine, easily form the tandem product that meets country and international standard, good circuit and structure thereof, layout designs are advantage of the present utility model places, are also the important leverages that meets efficient and low-cost production, high reliability, manufacturing technology advance.
Accompanying drawing explanation
Fig. 1 is the structural design schematic diagram of the utility model cutting machine
Fig. 2 is the components and parts layout designs schematic diagram of the utility model cutting machine rectification (circuit) plate
Fig. 3 is the utility model cutting machine IGBT(circuit) the components and parts layout designs schematic diagram of plate
Fig. 4 is the components and parts layout designs schematic diagram of the utility model cutting machine master board
In figure, the title of each parts is as follows: 1, braces; 2, plastics rear board; 3, the shell of cutting machine; 4, plastics front panel; 5, left overarm brace; 6, rectification circuit plate; 7, IGBT circuit board; 8, right overarm brace; 9, inversion main transformer; 10, median septum; 11, master control circuit board; 12, main transformer mounting bracket system; 13, filter reactor; 14, filter reactor mounting bracket system; 15, control transformer; 16, foundation of incision machine plate; 17, power switch; 18, compressed air inlet port; 19, power supply linear system; 20, cooling fan; 21, compressed air baroswitch; 22, electromagnetic gas valve; 23, cutting machine rubber lower margin system; 24, the quick out splice going splice assembly of gas-electricity one formula; 25, aviation plug; 26, workpiece clamp fast cable joint assembly; 27, output current regulator potentiometer; 28, gas testing detects/cuts change-over switch; 29, power supply, work, heat protection indicator lamp.
The specific embodiment
As shown in Figure 1, one
adopt the structure of the contravariant air plasma cutter of single tube IGBTexcept a small amount of parts such as the shell 2,3,4 and 16 of cutting machine, cooling fan 20, power switch 17, power line 19, the internal main of cutting machine will be divided into two part of upper and lower layer, rectification circuit plate 6 and the left and right positioned opposite of IGBT circuit board 7, be positioned at the front of rear portion cooling fan 20, be convenient to fan coolling device, the function aspects of circuit, its upper strata circuit part effect is power supply, input rectifying and filtering and output parameter control section; Its lower circuit partial action is the parts such as inversion conversion, output rectification and current filtering, current signal detection and air pressure detection.Between each several part, carry out circuit connection by some pilots.
Described top section, mainly comprise: the parts such as rectification circuit plate 6, IGBT circuit board 7, master control circuit board 11, power supply line 19, power switch 17, compressed air intake interface 18, master control circuit board 11 is positioned at the front on cutting machine upper strata, away from other parts of large electric current strong electromagnetic, to improve the functional reliability of product, the Main Function of rectification circuit plate 6 is: 1) complete from the conversion of electrical network AC-to DC output; 2) conversion that DC operation is exported is arrived in the interchange that completes tens KHz of inversion generation again, and the Main Function of IGBT circuit board 7 is: the 1) filtering after the rectification of rectification circuit plate; 2), under the effect of control circuit, complete the exchange conversion from HVDC to tens KHz with the circuit of the common composition of other parts.
Described lower circuit plate portion, mainly contains the parts such as inversion main transformer 9, filter reactor 13, control transformer 15, compressed air baroswitch 21, electromagnetic gas valve 22.
The parts of installing on the front panel of cutting machine mainly contain: plastics front panel 4, work and power supply and hot guard mode indicator lamp 29(are divided into three, and green is the indication of cutting machine output services; White is power supply indication; Yellow is superheat state indication), gas testing detects/cuts the parts such as change-over switch 28, output current regulator potentiometer 27, the quick out splice going splice assembly 24 of gas-electricity one formula, workpiece clamp fast cable joint assembly 26, aviation socket 25.
The parts of installing on the rear board of cutting machine mainly contain: the parts such as power supply line 19, power switch 17, compressed air intake interface 18, plastics rear board 2, cooling fan 20.
As shown in Figure 2, on the rectification circuit plate 6 of top section, be furnished with: single-phase rectifier Q2 and radiator, 30A/24V DC relay K1, fast quick-recovery commutation diode and radiator D11 thereof and D12,50A/75mv current divider, also have electronic device and the parts such as a lot of resistance R, capacitor C, connector, the effect of relay be cutting machine power on buffering control, prevent that starting up's dash current is excessive, the effect of fast quick-recovery commutation diode is to be average anode current by the AC rectification of tens KHz, and current divider is realized the sampling of current output signal.
As shown in Figure 3, on IGBT circuit board 7, be furnished with: the electrolytic capacitor filter of three 470 μ F/400V, 4 single tube IGBT and electronic device and the parts such as radiator, resistance, electric capacity and connector, electrochemical capacitor has been mainly the filtering control of waveform after the conversion of electrical network AC-to DC, and IGBT is the electronic switch of inversion control.
As shown in Figure 4, upper in master board (11), be furnished with a large amount of electronic devices and components.The functions such as the circuit of these device compositions is realized inversion conversion, output constant current Characteristics Control, the buffering that powers on control, air-flow control, overtemperature protection control.
the utility modelthree circuit board assemblies adopt that high efficiency inserter and bonding machine complete that device is installed automatically, welding, therefore, circuit board highly efficient in productivity, error rate is low, makes quality all higher, and the first-time qualification rate finally can make cutting machine production time is very high.Reduce production cost, improved the competitiveness of product in market.
The utility model cutting machine adopts modular design concept, and main modular has: rectification circuit plate 6; IGBT circuit board 7; Master board 11; Inversion main transformer 9; Electric current output filtering reactor 13; Striking high frequency coupling reactor, cabinet etc.To the cutting machine of different current classes and cyclic duration factor requirement, can be by the different module specifications parameter of configuration, form the product of different output rated current and cyclic duration factor, make product seriation, for example, adopt IGBT device and heat sink size thereof little or different current classes, can form the assembly that another is applicable to little electric current (as 20A, 30A) output; Change model and the parameter of fast recovery diode, coordinate and change corresponding radiator, can form other fast quick-recovery commutation diode and heat spreader module etc. thereof, certainly, the variation of these modules and parts, object is that the cost of manufacture of product and the specifications parameter of corresponding machine and performance indications are matched, like this, the cutting machine of every kind of specifications and models could be realized optimized Cost Control Model, simultaneously, also can make the cutting machine of different size have different costs, this has just promoted the market competitiveness of institute's development.
Cooling fan 20 is positioned at the rear portion of cutting machine bottom cabinet 16, and cold wind enters from the air admission hole at cutting machine cabinet rear portion, can make some heater members of upper and lower layer segment or parts (as IGBT and radiator thereof; Fast recovery diode and radiator thereof; Main transformer 9; Out put reactor 13 grades have good cooling effect, and such air channel and type of cooling design are also one of major reasons of the utility model Air Plasma Arc Cutting Machine larger electric current of realization and high capacity water holdup.
The operation principle of the utility model cutting machine is summarized as follows: after energising, power switch (17) is connected electric network source.The charged work such as corresponding control transformer (15) and control panel (6,7,11).The alternating current coming from electrical network becomes direct current after the rectifier bridge rectification on circuit board (6).Pass through again IGBT(circuit) filtering of three 470 μ F/400V electrochemical capacitors on plate (7), become comparatively galvanic current, supply with the inverter circuit being formed by IGBT assembly (7), contravariant transformer (9), fast recovery diode assembly etc.Detect/cut change-over switch (28) by the gas testing on cutting machine front panel (16), whether the gas pressure that can detect cutting machine is normal, the phenomenon such as whether leak gas.If detect normally, be transformed into by this switch (28) duty of preparing cutting.Compressed-air actuated air pressure and flow can be set by pressure-reducing valve.In the time that air pressure is enough, air pressure sense switch (21) could move, and just can make cutting machine carry out work, prevents that compressed-air actuated air pressure or underfed from burning out plasma cutting gun.When cutting, press the switch on plasma cutting gun, can realize the pilot arc igniting of the little electric current of plasma, without contact workpiece.In the time that cutting gun goes cut workpiece, between the electrode of cutting gun and workpiece, can form the cutting plasma arc of large electric current, realize the cutting operation to workpiece.Striking high frequency need to could form under the effects such as control circuit, striking high frequency coupling reactor and striking reactor.If cutting machine has electric current output, could move near the magnetic-control switch of dry-reed of striking high frequency coupling reactor, just can send the control enforcement state conversion of signal to circuit.The control of inversion and cutting machine output current parameter is to realize by the current divider (50A/75mv) of the control circuit of circuit board (11), given value of current potentiometer (27), current detecting etc.The output external characteristic of cutting machine power supply is for vertically suddenly falling or constant current output characteristic.This output characteristics is to realize by the cut-off negative-feedback of output current and the pwm pulse width adjusting of inverter circuit IGBT.The size of electric current output is regulated and is set by potentiometer (27).Current divider (50A/75mv) is sampled to output current.Under the control action of circuit board, in the time that the output current size detecting exceedes the setting value of potentiometer (27), the width of the pwm pulse that master board (11) produces can reduce.Along with the small increase of output current, pwm pulse width significantly reduces, and has so just realized the small increase of electric current, output voltage fast-descending, and cutting machine produces and vertically suddenly falls or constant current output characteristic.Regulator potentiometer (27) is the output current size of adjustable cutting machine, realizes the cutting operation to different-thickness workpiece.About feedback and PWM and output characteristics control procedure, can understand referring to relevant control principle explanation.In addition, in the time that superheating phenomenon occurs main parts size in cutting machine (as IGBT, transformer), control circuit can cut out pwm pulse output, and meanwhile, cutting machine stops electric current output, and overheating indicator lamp (yellow) is lighted.Under the effect of cooling blower, when main parts size (as IGBT, transformer) is after temperature dropped to a certain extent, control circuit could produce pwm pulse output.Meanwhile, cutting machine just may have electric current output, and overheating indicator lamp (yellow) extinguishes simultaneously.
Good circuit and structure thereof, layout designs are advantage of the present utility model places, are also the important leverages that meets efficient and low-cost production, high reliability, manufacturing technology advance.The content of the utility model patent application protection is just to protect the structure and layout design of this cutting machine.
The utility model has not only adopted advanced reverse control technology, and has the advantages such as simple in structure, volume is little, lightweight, production efficiency is high, manufacturing process is advanced.By changing configuration specification and the parameter of disparate modules, can change the size of output current or power and the cyclic duration factor of cutting machine, easily form the tandem product that meets country and international standard.For example, make the cutting machine product of 40A, 30A, 20A current class, can make the power output of cutting machine large, output-current rating is up to 40A/96V(40% cyclic duration factor)～20A/88V(80% cyclic duration factor) level.
Above content is in conjunction with concrete cutting machine structure, layout and circuit board and controls the detailed description that function is done the utility model, can not assert that concrete enforcement of the present utility model is only limited to these explanations.Concerning the others skilled in the art of technical field described in the utility model, without departing from the inventive concept of the premise, can also make some simple deductions and replacement, these all should be considered as belonging to the category of the utility model protection.
Claims (2)
1. one kind
adopt the structure of the contravariant air plasma cutter of single tube IGBT, it is characterized in that: comprise rectification circuit plate, IGBT circuit board, master board, inversion main transformer, electric current output filtering reactor, cabinet, control transformer, baroswitch and electromagnetic gas valve, between various piece, carry out circuit connection by some pilots, cabinet inside is divided into, lower two-layer, wherein inversion main transformer, filter reactor, control transformer, compressed air baroswitch, electromagnetic gas valve is arranged on lower floor, rectification circuit plate, IGBT circuit board, master control circuit board is arranged on upper strata, rectification circuit plate and an IGBT circuit board left side, right positioned opposite, be positioned at the rear portion on upper strata the front in cabinet rear portion cooling fan, be convenient to fan coolling device, master control circuit board is positioned at the front portion on upper strata, master control circuit board below is provided with median septum and the isolation of lower layer elements device.
2. one as claimed in claim 1
adopt the structure of the contravariant air plasma cutter of single tube IGBT, it is characterized in that: the parts of installing on the front panel of cabinet have: plastics front panel, work and power supply and hot guard mode indicator lamp, gas testing detect/cut change-over switch, output current regulator potentiometer, the quick out splice going splice assembly of gas-electricity one formula, workpiece clamp fast cable joint assembly, aviation socket; The parts of installing on the rear board of cabinet have: power supply line, power switch, compressed air intake interface, plastics rear board, cooling fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320785960.4U CN203696217U (en) | 2013-12-04 | 2013-12-04 | Structure of inverter air plasma cutting machine adopting single IGBT (Insulated Gate Bipolar Transistor) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320785960.4U CN203696217U (en) | 2013-12-04 | 2013-12-04 | Structure of inverter air plasma cutting machine adopting single IGBT (Insulated Gate Bipolar Transistor) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203696217U true CN203696217U (en) | 2014-07-09 |
Family
ID=51046716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320785960.4U Expired - Fee Related CN203696217U (en) | 2013-12-04 | 2013-12-04 | Structure of inverter air plasma cutting machine adopting single IGBT (Insulated Gate Bipolar Transistor) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203696217U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105478966A (en) * | 2016-01-14 | 2016-04-13 | 浙江肯得机电股份有限公司 | 220 V and 380 V double-power-source IGBT inversion multifunctional welding machine |
| CN109644548A (en) * | 2016-05-02 | 2019-04-16 | 海别得公司 | Cooling plasma cutting system and relevant system and method |
-
2013
- 2013-12-04 CN CN201320785960.4U patent/CN203696217U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105478966A (en) * | 2016-01-14 | 2016-04-13 | 浙江肯得机电股份有限公司 | 220 V and 380 V double-power-source IGBT inversion multifunctional welding machine |
| CN105478966B (en) * | 2016-01-14 | 2017-03-08 | 浙江肯得机电股份有限公司 | A kind of 220V and 380V dual power supply IGBT inversion multifunctional welding machine |
| CN109644548A (en) * | 2016-05-02 | 2019-04-16 | 海别得公司 | Cooling plasma cutting system and relevant system and method |
| CN109644548B (en) * | 2016-05-02 | 2021-04-30 | 海别得公司 | Cooled plasma cutting systems and related systems and methods |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205324961U (en) | Single tube IGBT industrial grade contravariant air plasma arc cutting machine | |
| CN102163926B (en) | High-power converter based on parallel IGBT (Insulated Gate Bipolar Transistor) modules | |
| CN201862897U (en) | Multifunctional inverter type welding and cutting machine | |
| CN201900364U (en) | Circuit of inversion shielded ace welding machine of single-tube IGBT (insulated gate bipolar transistor) and circuit board structure of circuit | |
| CN103051208B (en) | Frequency conversion power module of all-in-one machine of explosive-proof frequency conversion motor | |
| CN202135044U (en) | Composite power module of intelligent frequency conversion | |
| CN204430530U (en) | A kind of structure of the gas shield inverter type welder with manual electric arc welding function | |
| CN204290687U (en) | Frequency converter | |
| CN102785005A (en) | MOSFET (metal-oxide-semiconductor field effect transistor)-based inverter type welding equipment by sdie inlet air | |
| CN203696217U (en) | Structure of inverter air plasma cutting machine adopting single IGBT (Insulated Gate Bipolar Transistor) | |
| CN203817607U (en) | Structure of inverter type air plasma arc cutting machine | |
| CN204231177U (en) | Integrated chassis frequency converter | |
| CN201075821Y (en) | Power factor corrector for frequency converting air conditioner | |
| CN201499093U (en) | High-frequency switch power supply | |
| CN205464760U (en) | Igbt module 100a industrial grade plasma arc cutting machine | |
| CN203883664U (en) | A modular large power induction heating power supply and heat dissipation device thereof | |
| CN202856646U (en) | Inverter cabinet with great heat exchanging capability | |
| CN202043029U (en) | Miniature frequency converter with large power | |
| CN202997906U (en) | High frequency switching power supply for electrostatic dust removal | |
| CN203454344U (en) | Temperature adjusting system of elevator control chamber | |
| CN208445287U (en) | A kind of power quality controlling device of included feedback compensation function | |
| CN207150178U (en) | Dynamic svg modules and intelligent capacitor hybrid reactive power compensation device | |
| CN202877690U (en) | Structure of subminiature high-duty-cycle IGBT (Insulated Gate Bipolar Translator) inverted arc welding machine | |
| CN205657354U (en) | GGD AC low voltage power switch board cabinet | |
| CN201752811U (en) | Inverter type manual arc welding machine of insulated gate type field effect transistor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20211204 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |