CN202447800U - Arc ignition circuit of plasma cutting machine - Google Patents
Arc ignition circuit of plasma cutting machine Download PDFInfo
- Publication number
- CN202447800U CN202447800U CN2012200905289U CN201220090528U CN202447800U CN 202447800 U CN202447800 U CN 202447800U CN 2012200905289 U CN2012200905289 U CN 2012200905289U CN 201220090528 U CN201220090528 U CN 201220090528U CN 202447800 U CN202447800 U CN 202447800U
- Authority
- CN
- China
- Prior art keywords
- circuit
- arc ignition
- current feedback
- feedback circuit
- bridge rectifier
- 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 - Lifetime
Links
Images
Landscapes
- Arc Welding Control (AREA)
Abstract
The utility model discloses an arc ignition circuit of a plasma cutting machine, which has the advantages of high arc ignition success rate and high reliability. The arc ignition circuit comprises a full-bridge rectifier circuit and a transformer, wherein the transformer is directly connected with an input terminal of the full-bridge rectifier circuit; an output terminal of the full-bridge rectifier circuit is connected with a current feedback circuit; meanwhile, a switching device is also arranged on the current feedback circuit; the current feedback circuit comprises a current sensor B1 and a current sensor B2 which are connected in series; the current sensor B1 serves as a connecting terminal; the current sensor B2 is simultaneously connected with the switching device; and the switching device is a normally open contact of a relay K1 and serves as another connecting terminal. The arc ignition circuit has the advantages that the relay is adopted to replace a contactor in the conventional arc ignition circuit, and the current feedback circuit is adopted to replace a power resistor, so that the arc ignition success rate is increased and the reliability is high.
Description
Technical field
The utility model relates to the arc ignition circuit of the CUT that is used to cut in a kind of industry.
Background technology
The arc ignition circuit of existing CUT mainly contains two kinds: the one, adopt contactor and power resistor polyphone; This mode poor reliability is damaged easily.The 2nd, adopt IGBT copped wave; This mode is controlled complicacy, and cost is high.
Publication number is that 201042104 Chinese patent provides a kind of novel plasma cutting machine arc ignition circuit; This arc ignition circuit comprises transformer, magnetic control inductance, full bridge rectifier and current feedback circuit, and transformer, magnetic control inductance, full bridge rectifier and current feedback circuit are cascaded successively.Transformer and full bridge rectifier provide the striking energy, and the magnetic control inductance is as electronic switch, and current feedback circuit limits the striking electric current.The utility model adopts the magnetic control inductance to replace the contactor in the existing arc ignition circuit, adopts current feedback circuit to replace power resistor, has improved arcing initiation success rate, good reliability.
But this patent will be provided with the magnetic control inductance at the input of rectification circuit; The current feedback circuit of output is a current sensor that has winding; There is certain problem in the use in it: the control circuit complex structure; The magnetic control inductance is loaded down with trivial details with the current sensor manufacture craft that has winding, and cost is high, the rectification circuit poor reliability.
The utility model content
The utility model provides the CUT arc ignition circuit of a kind of arcing initiation success rate height, good reliability to the deficiency of prior art.
The technical solution that the utility model adopts is:
A kind of CUT arc ignition circuit; It comprises full bridge rectifier and transformer; Transformer directly is connected with the input of full bridge rectifier, and the output of full bridge rectifier is connected with current feedback circuit, on current feedback circuit, also is provided with a switching device simultaneously.
Said current feedback circuit is current sensor B1, the B2 of serial connection, and current sensor B1 is as a link, and current sensor B2 also is connected with switching device simultaneously.
Said switching device is the normally opened contact of relay K 1, and as another link.
The CUT arc ignition circuit of the utility model mainly comprises transformer, full bridge rectifier, relay and current feedback circuit.
After the transformer work, electric current is through the full bridge rectifier full-bridge rectification, and through current feedback circuit, the switching device of flowing through is again realized transferred arc output.Transformer and full bridge rectifier provide the striking energy, and switching device has or not as switch control electric current, and current feedback circuit then limits the size of striking electric current.
The beneficial effect of the utility model is: adopt relay to replace the contactor in the existing arc ignition circuit, adopt current feedback circuit to replace power resistor, improved arcing initiation success rate, good reliability.
The utility model and publication number are that 201042104 Chinese patent provides a kind of novel plasma cutting machine arc ignition circuit to compare; The magnetic control inductance that has saved rectification circuit input end in the utility model; A current sensor that has winding of output; Control circuit is simple in structure, and manufacture craft is convenient, and cost is low.The output of full bridge rectifier is connected with current feedback circuit, and switching device is located on the current feedback circuit simultaneously, and the rectification circuit reliability is high.
Description of drawings
Accompanying drawing 1 is the circuit theory diagrams of the utility model.
Wherein: 1, current feedback circuit, 2, full bridge rectifier, 3, switching device, 4, transformer.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
The circuit theory diagrams of the utility model comprise transformer 4, full bridge rectifier 2, relay 3 and current feedback circuit 1 shown in accompanying drawing 1.After transformer 4 work, current i is through full bridge rectifier 2 full-bridge rectification, and the B2 in the current feedback circuit 1 of flowing through again through switching device 3, realizes transferred arc output.Switching device 3 is normally opened contacts of relay K 1.The having or not of electric current is through 3 controls of the B1 feedback signal enable switch device in the current feedback circuit 1, and the size of electric current is through the restriction of the B2 in the current feedback circuit 1.Transformer 4 provides the striking energy with full bridge rectifier 2, and switching device 3 is as gauge tap, and the B2 in the current feedback circuit 1 limits the striking electric current.The utility model adopts switching device 3 to replace the contactor in the existing arc ignition circuit, adopts the B2 in the current feedback circuit 1 to replace power resistor.
Claims (3)
1. CUT arc ignition circuit; It comprises full bridge rectifier and transformer, it is characterized in that, transformer directly is connected with the input of full bridge rectifier; The output of full bridge rectifier is connected with current feedback circuit, on current feedback circuit, also is provided with a switching device simultaneously.
2. CUT arc ignition circuit as claimed in claim 1 is characterized in that, said current feedback circuit is current sensor B1, the B2 of serial connection, and current sensor B1 is as a link, and current sensor B2 also is connected with switching device simultaneously.
3. according to claim 1 or claim 2 CUT arc ignition circuit is characterized in that said switching device is the normally opened contact of relay K 1, and as another link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200905289U CN202447800U (en) | 2012-03-12 | 2012-03-12 | Arc ignition circuit of plasma cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200905289U CN202447800U (en) | 2012-03-12 | 2012-03-12 | Arc ignition circuit of plasma cutting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202447800U true CN202447800U (en) | 2012-09-26 |
Family
ID=46863694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200905289U Expired - Lifetime CN202447800U (en) | 2012-03-12 | 2012-03-12 | Arc ignition circuit of plasma cutting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202447800U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103350273A (en) * | 2013-06-18 | 2013-10-16 | 嘉兴力德数控科技有限公司 | Arc strike starting circuit of plasma cutting machine |
-
2012
- 2012-03-12 CN CN2012200905289U patent/CN202447800U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103350273A (en) * | 2013-06-18 | 2013-10-16 | 嘉兴力德数控科技有限公司 | Arc strike starting circuit of plasma cutting machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202447800U (en) | Arc ignition circuit of plasma cutting machine | |
| CN203026386U (en) | Safe high-voltage current direction converter | |
| CN203013470U (en) | Novel transformer coil shunting connecting structure | |
| CN202940184U (en) | Single pressure switch incapable of being automatically reset | |
| CN203118876U (en) | Energy-saving type double-coil tripolar direct-current contactor | |
| CN201985532U (en) | Intelligent composite integrated switch | |
| CN202333789U (en) | Switch current limiter for heat tracing transformer | |
| CN205407592U (en) | No -voltage quasi -resonance boost circuit | |
| CN201283463Y (en) | Intelligent energy-saving electricshock-proof electric welding machine | |
| CN203689040U (en) | Novel circuit control switch | |
| CN202334407U (en) | Self-coupling voltage-reducing starting cabinet | |
| CN204102016U (en) | A kind of rotary-connecting AC voltage regulator | |
| CN204102834U (en) | Residual current circuit breaker after a kind of improvement | |
| CN203312185U (en) | Electromagnetic type alternating current contactor | |
| CN201728464U (en) | Capacitor energy-storage type spot/projection welding machine | |
| CN203522563U (en) | Device and system for pulse isolation | |
| CN203774197U (en) | Intermediate relay with protective function | |
| CN201117544Y (en) | Intelligent control device adopting IGBT device | |
| CN201889568U (en) | Energy-saving electric iron | |
| CN203398794U (en) | Capacitor switching synchronization switch | |
| CN201042104Y (en) | Arc leading circuit for novel plasm cutter | |
| CN204416886U (en) | A kind of magnet control system based on 6RA70 DC driver | |
| CN204927006U (en) | Miniature transformer economizer | |
| CN201975792U (en) | Power saver of glue producing device | |
| CN201886883U (en) | Transformer with universal switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |