A co2 laser power supply with sinusoidal conversion of inductance and capacitance
A sine transformation, inductance and capacitance technology, applied in lasers, laser parts, circuits, etc., can solve the problems of unstable output, damage, power supply damage, etc., and achieve the effect of fast response speed, high control accuracy and good stability
Inactive Publication Date: 2011-12-14
NO 709 RES INST OF CHINA SHIPBUILDING IND CORP
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Problems solved by technology
[0002] At present, China's laser industry is developing rapidly, and lasers are widely used in various fields such as welding, cutting, marking, scribing, and film engraving; however, the development of laser power supplies has become an important bottleneck restricting the development of the laser industry, and the work reliability is not high enough. Insufficient output stability is a common problem with common laser power supplies on the market
The main reason is that the main circuit topology and CO 2 The load characteristics of the laser tube are not suitable, resulting in easy damage to the power supply and affecting the normal operation of the system
At the same time, due to the load CO 2 The laser tube is prone to abnormal problems such as air leakage and damage, and it is also easy to cause damage to the power supply
In addition, its products are basically controlled by analog circuits, and its control accuracy and response speed are difficult to meet the high-precision requirements of the system.
Method used
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[0024] according to Figure 1-6 As shown, an inductor-capacitor sinusoidal transformation CO 2 The laser power supply includes: a drive circuit, a laser output control circuit, a current sampling circuit, and a DSP controller that digitally processes current feedback signals using an inductance-capacitance sine conversion circuit in the main circuit unit.
[0025] The main circuit unit includes: rectification and filtering circuit, half-bridge inverter circuit, inductance-capacitance sinusoidal conversion circuit and high-voltage conversion circuit.
[0026] The inductance-capacitance sine conversion circuit is composed of inductor L3, capacitor C10, and high-voltage package T7; the two taps on the primary side of the high-voltage package T7 are respectively connected to the two pins of the capacitor C10, and the first tap on the primary side of the high-voltage package T7 is connected to the inductor L3 at the same time. The 2nd tap is connected.
[0027] DSP controller, th...
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An inductance-capacitance sinusoidal conversion CO2 laser power supply, including: a drive circuit, a laser output control circuit, a current sampling circuit, and a main circuit and a DSP controller circuit. The main circuit unit adopts an inductance-capacitance sinusoidal conversion circuit to digitally process current feedback signals DSP controller. Its advantages are: the sinusoidal conversion circuit of the inductance and capacitance enables the output terminal to obtain a current that is proportional to the input terminal voltage and has nothing to do with the load impedance change, which can well meet the load characteristics of the CO2 laser tube and provide a phase for the normal operation of the laser tube. Matching energy supply; through the monitoring of the load current by the DSP controller, timely discover whether the CO2 laser tube is abnormal, and prevent damage to the laser power supply due to its abnormality; full digital control ensures high control precision, fast response speed and stability of the power supply it is good.
Description
technical field [0001] The invention relates to a control chip with DSP as the core, and utilizes the sinusoidal transformation of inductance and capacitance to generate 2 The technical field of excitation power supply for laser tube load characteristics, specifically an inductance-capacitance sinusoidal conversion CO 2 Laser power. Background technique [0002] At present, China's laser industry is developing rapidly, and lasers are widely used in various fields such as welding, cutting, marking, scribing, and film engraving; however, the development of laser power supplies has become an important bottleneck restricting the development of the laser industry, and the work reliability is not high enough. Insufficient output stability is a common problem with common laser power supplies on the market today. The main reason is that the main circuit topology and CO 2 The load characteristics of the laser tube are not suitable, resulting in easy damage to the power supply and ...
Claims
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IPC IPC(8): H01S3/223H01S3/09
Inventor 李勇曹敏王震肖刚
Owner NO 709 RES INST OF CHINA SHIPBUILDING IND CORP