CN206524756U - Laser power supply controls circuit and laser - Google Patents
Laser power supply controls circuit and laser Download PDFInfo
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- CN206524756U CN206524756U CN201720182332.5U CN201720182332U CN206524756U CN 206524756 U CN206524756 U CN 206524756U CN 201720182332 U CN201720182332 U CN 201720182332U CN 206524756 U CN206524756 U CN 206524756U
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Abstract
The utility model is related to a kind of laser power supply control circuit and laser.A kind of laser power supply controls circuit, including：Main control unit, first switch pipe, second switch pipe and sampling unit；The input of first switch pipe is connected with Switching Power Supply, and the output end of first switch pipe is connected with the input of second switch pipe, and the output end of second switch pipe is connected with load；Sampling unit is connected with main control unit, load respectively, the current signal for gathering load；Control end, the control end of second switch pipe of main control unit respectively with first switch pipe are connected, for the switching frequency and the output current of second switch pipe according to current signal feedback control first switch pipe.The output current of second switch pipe is controlled by main control unit, also the switching frequency of Synchronization Control first switch pipe, and then the driving current of control and semiconductor laser modulation, semiconductor laser is obtained required welding energy, effectively carry out micron, the precision welding of nanometer scale.
Description
Technical field
The utility model is related to power technique fields, more particularly to laser power supply control circuit and laser.
Background technology
Laser welding is a kind of emerging welding procedure, and its maximum advantage of relatively various traditional weldings is exactly welding energy
Density is high, and heated effluent field is small, deforms small, weld seam fineness.Laser welding technology has molten bath clean-up effect, can pure welding material
Material, it is particularly advantageous to the welding of of the same race or different materials, it is adaptable to identical between different metal material, the weldering of plastic or other material
Connect.
Current laser processing technology has had been applied to many aspects of production and life, especially miniature IT product, electricity
Precision welding on sub- member device structural member needs advanced equipment, hand work and is accurately controlled mode.Long pulse (ms)
Laser is used for more than 0.2mm cut deal welding, and for below 0.1mm light sheet materials, high anti-material (such as copper alloy,
Aluminium alloy class) welding usually hang back, therefore long-pulse laser be difficult to realize micron, the spy of the precision welding of nanometer scale
Point.Optical fiber laser is when welding thin plate, and the low pulse welding of peak value can cause to puncture, and be difficult to below 0.1mm weldering
Point.
Utility model content
Based on this, it is necessary in view of the above-mentioned problems, offer is a kind of can to realize micron, the precision welding requirement of nanometer scale
Laser power supply control circuit and laser.
A kind of laser power supply controls circuit, including：Main control unit, first switch pipe, second switch pipe and sampling unit；
The input of the first switch pipe is connected with Switching Power Supply, the output end of the first switch pipe and described second
The input connection of switching tube, the output end of the second switch pipe is connected with load；
The sampling unit is connected with the main control unit, load respectively, the current signal for gathering the load；
Control end, the control end of second switch pipe of the main control unit respectively with the first switch pipe are connected, and are used for
The output current of the switching frequency of first switch pipe and second switch pipe according to the current signal feedback control.
Above-mentioned laser power supply controls circuit, and the output current of second switch pipe is controlled by main control unit, also synchronous control
The switching frequency of first switch pipe processed, and then the driving current with semiconductor laser modulation is controlled, obtain semiconductor laser
Required welding energy is taken, micron, the precision welding of nanometer scale is effectively carried out.
In one of the embodiments, the main control unit includes fpga chip, and the fpga chip is used for according to described
The switches switching frequency of current signal feedback control first switch pipe, is additionally operable to control the output current of second switch pipe.
In one of the embodiments, the first switch pipe is metal-oxide-semiconductor or igbt；Described second opens
It is metal-oxide-semiconductor or igbt to close pipe.
In one of the embodiments, the first switch pipe is metal-oxide-semiconductor, and the second switch pipe is metal-oxide-semiconductor；
The source electrode of first metal-oxide-semiconductor is connected with Switching Power Supply, the drain electrode of first metal-oxide-semiconductor and second metal-oxide-semiconductor
Drain electrode connection, the source electrode of second metal-oxide-semiconductor is connected with loading；Grid, the grid of the second metal-oxide-semiconductor of first metal-oxide-semiconductor
It is connected respectively with the main control unit.
In one of the embodiments, first metal-oxide-semiconductor is p-type metal-oxide-semiconductor, and second metal-oxide-semiconductor is N-type metal-oxide-semiconductor.
In one of the embodiments, in addition to filter unit, the filter unit is serially connected in Switching Power Supply and first and opened
Between the pipe of pass.
In one of the embodiments, the filter unit includes the first electric capacity and the second electric capacity, first electric capacity
One end is connected with Switching Power Supply, the other end ground connection of first electric capacity；One end of second electric capacity is connected with Switching Power Supply,
The other end ground connection of second electric capacity.
In addition, a kind of laser is also provided, including Switching Power Supply, in addition to above-mentioned laser power supply control circuit.
Brief description of the drawings
Fig. 1 is the structural framing figure of laser power supply control circuit in one embodiment；
Fig. 2 is the circuit diagram of laser power supply control circuit in one embodiment；
Fig. 3 is the drive waveforms figure of first switch pipe and second switch pipe 130 in one embodiment.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain this
Utility model, is not used to limit the utility model.
Fig. 1 is the structural framing figure that a kind of laser power supply controls circuit.In one embodiment, laser power supply is controlled
Circuit, including：Main control unit 110, first switch pipe 120, second switch pipe 130 and sampling unit 140.Wherein, first switch
The input of pipe 120 is connected with Switching Power Supply, and the output end of first switch pipe 120 is connected with the input of second switch pipe 130,
The output end of second switch pipe 130 is connected with load；Sampling unit 140 is connected with main control unit 110, load respectively, for adopting
Collect the current signal of load；Control end, the control end of second switch pipe 130 of main control unit 110 respectively with first switch pipe 120
Connection, the output electricity for the switching frequency according to current signal feedback control first switch pipe 120 and second switch pipe 130
Stream.
In one embodiment, load as semiconductor laser.Main control unit 110 controls second switch pipe 130 in advance
Grid voltage, and then control the current value of semiconductor laser, the current signal constantly modulation the gathered according to sampling unit 140
The switches switching frequency of one switching tube 120, switching frequency scope is in 500~8000Hz, by controlling first switch pipe 120 continuous
Switch switching, can play accumulation semiconductor laser goes out light energy, so as to adjust the by main control unit 110
The switching frequency of one switching tube 120 meets micro-member welding demand, the welding energy required for obtaining, and effectively carries out micro-
Rice, the precision welding of nanometer scale.Meanwhile, the current signal of the noise spectra of semiconductor lasers of sampling unit 140 is sampled, fed back,
Main control unit 110 is controlled first switch pipe 120, second switch pipe 130, it is ensured that semiconductor in real time according to current signal
Laser exports the stabilization of energy.
In one embodiment, main control unit 110 includes fpga chip, and fpga chip, which is used to be fed back according to current signal, to be controlled
The switches switching frequency of first switch pipe 120 processed, is additionally operable to control the output current of second switch pipe 130.Field-programmable is patrolled
Gate array (Field Programmable Gate Array, FPGA) is collected, it is in programming devices such as PAL, GAL, CPLD
On the basis of the product that further develops.It is that occur as a kind of semi-custom circuit in application specific integrated circuit (ASIC) field
, the deficiency of custom circuit had both been solved, the limited shortcoming of original programming device gate circuit number is overcome again.
In one embodiment, main control unit 110 also includes frequency adjustment unit and current regulation unit, fpga chip hair
Go out frequency error factor control instruction, frequency adjustment unit adjusts cutting for first switch pipe 120 according to the frequency error factor control instruction
Change frequency.Fpga chip sends current regulation control instruction, and current regulation unit is instructed according to the current regulation control and adjusted
The output current of second switch pipe 130.
In one embodiment, first switch pipe 120 is high frequency conversion switching tube.The square wave control that main control unit 110 is sent
Signal processed as high frequency conversion switching tube Trig control signal, for being switched fast for HF switch pipe.High frequency conversion is switched
Pipe can be with metal-oxide-semiconductor (mos field effect transistor), with electric current is big, high pressure and small from stray inductance
Encapsulating structure.HF switch pipe can also be igbt (Insulate-Gate Bipolar
Transistor, IGBT), it is MOS structure bipolar device, belongs to high speed performance and bipolar low resistance with power MOSFET
The power device of performance.
Accordingly, second switch pipe 130 can be metal-oxide-semiconductor, or igbt.
In one embodiment, first switch pipe 120, second switch pipe 130 are metal-oxide-semiconductor, wherein, the first metal-oxide-semiconductor Q1
For p-type metal-oxide-semiconductor, the second metal-oxide-semiconductor Q2 is N-type metal-oxide-semiconductor.First metal-oxide-semiconductor Q1 source electrode is connected with Switching Power Supply, the first metal-oxide-semiconductor Q1
Drain electrode be connected with the second metal-oxide-semiconductor Q2 drain electrode, the second metal-oxide-semiconductor Q2 source electrode is connected with load；First metal-oxide-semiconductor Q1 grid,
Second metal-oxide-semiconductor Q2 grid is connected with main control unit 110 respectively.Fig. 3 is the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 driving ripple
Shape figure.Main control unit 110 controls the second metal-oxide-semiconductor Q2 grid voltage, also the first metal-oxide-semiconductor of the Synchronization Control Q1 of main control unit 110
Switching frequency, controls the driving current of semiconductor laser, and then semiconductor laser can be made to obtain required welding energy,
Effectively carry out micron, the precision welding of nanometer scale.
In one embodiment, laser power supply control circuit also includes filter unit 150, and filter unit 150 is serially connected in
Between Switching Power Supply and first switch pipe 120.Filter unit 150 can be realized to be filtered to Head switches power supply output energy
Ripple, because late-class circuit needs quick change, then level power supply can not be by outside excessive interference before needing.
Filter unit 150 includes the first electric capacity C1 and the second electric capacity C2, wherein, the first electric capacity C1 is electrochemical capacitor.First
Electric capacity C1 one end is connected with Switching Power Supply, the first electric capacity C1 other end ground connection；Second electric capacity C2 one end and Switching Power Supply
Connection, the second electric capacity C2 other end ground connection.
In addition, the utility model embodiment also provides a kind of laser, including mentioned in Switching Power Supply, and above-described embodiment
Laser power supply control circuit.Due to being built-in with laser power supply control circuit in laser, controlled by main control unit 110
The switching frequency of the output current of second switch pipe 130, also Synchronization Control first switch pipe 120, and then control and modulate partly to lead
The driving current of body laser, makes semiconductor laser obtain required welding energy, effectively carries out micron, the essence of nanometer scale
Close welding.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and it describes more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (8)
1. a kind of laser power supply controls circuit, it is characterised in that including：Main control unit, first switch pipe, second switch pipe and
Sampling unit；
The input of the first switch pipe is connected with Switching Power Supply, output end and the second switch of the first switch pipe
The input connection of pipe, the output end of the second switch pipe is connected with load；
The sampling unit is connected with the main control unit, load respectively, the current signal for gathering the load；
Control end, the control end of second switch pipe of the main control unit respectively with the first switch pipe are connected, for basis
The output current of the switching frequency of first switch pipe and second switch pipe described in the current signal feedback control.
2. laser power supply according to claim 1 controls circuit, it is characterised in that the main control unit includes FPGA cores
Piece, the fpga chip is used for the switches switching frequency according to the current signal feedback control first switch pipe, is additionally operable to control
The output current of second switch pipe processed.
3. laser power supply according to claim 1 controls circuit, it is characterised in that the first switch pipe is metal-oxide-semiconductor
Or igbt；The second switch pipe is metal-oxide-semiconductor or igbt.
4. laser power supply according to claim 3 controls circuit, it is characterised in that the first switch pipe is metal-oxide-semiconductor,
The second switch pipe is metal-oxide-semiconductor；
The source electrode of first metal-oxide-semiconductor is connected with Switching Power Supply, the drain electrode and the leakage of second metal-oxide-semiconductor of first metal-oxide-semiconductor
Pole is connected, and the source electrode of second metal-oxide-semiconductor is connected with load；The grid of first metal-oxide-semiconductor, the grid difference of the second metal-oxide-semiconductor
It is connected with the main control unit.
5. laser power supply according to claim 4 controls circuit, it is characterised in that first metal-oxide-semiconductor is p-type MOS
Pipe, second metal-oxide-semiconductor is N-type metal-oxide-semiconductor.
6. laser power supply according to claim 1 controls circuit, it is characterised in that also including filter unit, the filter
Ripple unit is serially connected between Switching Power Supply and first switch pipe.
7. laser power supply according to claim 6 controls circuit, it is characterised in that the filter unit includes the first electricity
Hold and the second electric capacity, one end of first electric capacity is connected with Switching Power Supply, the other end ground connection of first electric capacity；Described
One end of two electric capacity is connected with Switching Power Supply, the other end of second electric capacity ground connection.
8. a kind of laser, including Switching Power Supply, it is characterised in that also including the laser as described in any one of claim 1~7
Device power control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720182332.5U CN206524756U (en) | 2017-02-27 | 2017-02-27 | Laser power supply controls circuit and laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720182332.5U CN206524756U (en) | 2017-02-27 | 2017-02-27 | Laser power supply controls circuit and laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206524756U true CN206524756U (en) | 2017-09-26 |
Family
ID=59893078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720182332.5U Active CN206524756U (en) | 2017-02-27 | 2017-02-27 | Laser power supply controls circuit and laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769360A (en) * | 2019-11-28 | 2020-02-07 | 陕西铁路工程职业技术学院 | Laser welding power control system and method for welding headset contact pin |
| CN112532219A (en) * | 2020-11-27 | 2021-03-19 | 广州极飞科技有限公司 | Bidirectional current control method and circuit |
-
2017
- 2017-02-27 CN CN201720182332.5U patent/CN206524756U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769360A (en) * | 2019-11-28 | 2020-02-07 | 陕西铁路工程职业技术学院 | Laser welding power control system and method for welding headset contact pin |
| CN112532219A (en) * | 2020-11-27 | 2021-03-19 | 广州极飞科技有限公司 | Bidirectional current control method and circuit |
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