CN202663603U - Pre-ignition circuit of pumping lamp of laser equipment - Google Patents
Pre-ignition circuit of pumping lamp of laser equipment Download PDFInfo
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- CN202663603U CN202663603U CN 201220199351 CN201220199351U CN202663603U CN 202663603 U CN202663603 U CN 202663603U CN 201220199351 CN201220199351 CN 201220199351 CN 201220199351 U CN201220199351 U CN 201220199351U CN 202663603 U CN202663603 U CN 202663603U
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- pumping lamp
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Abstract
The utility model discloses a pre-ignition circuit of a pumping lamp of laser equipment, comprising a high-voltage triggering arc ignition circuit and a low-current arc light holding circuit, wherein the high-voltage triggering arc ignition circuit is additionally provided with a small-power medium-voltage power supply, of which a control end is connected with a start-up signal output end of the laser equipment; and the low-current arc light holding circuit is a BUCK constant-current circuit including a pulse width modulation PWM controller. With the pre-ignition circuit, gas inside a pumping lamp with arc length greater than 140mm can be broken down instantly, the arc ignition is reliable, and the problem of poor pre-ignition of the laser equipment caused by unsuccessful arc ignition can be effectively solved. The pre-ignition circuit can also meet the requirements of the pumping lamp with arc length greater than 140mm on holding current; the circuit is low in loss and the power consumption is 25% of that of an original circuit under the same current; and no cooling structure needs to be designed separately so that the circuit is small in volume. In addition, no high-voltage protection circuit needs to be configured in a main circuit part so that the cost of the laser equipment can be greatly reduced and the reliability and safety of the laser equipment can be further improved.
Description
Technical field
The utility model relates to pumping lamp, particularly relates to a kind of laser equipment pumping lamp pre-burning circuit.
Background technology
Pulsed operation electric current during the pumping lamp regular picture of existing laser equipment is generally tens amperes to the hundreds of ampere.For prolonging the pumping lamp life-span, outside the work loop of its large electric current, mostly be provided with pre-burning circuit as shown in Figure 1, it comprises that the high pressure when pumping lamp powers on triggers arc ignition circuit, and the little electric current arc light holding circuit during the pumping lamp standby.After laser equipment powered on, input A, the B of pre-burning circuit got electric, and its voltage is about 540V, and one the tunnel is the capacitor C charging after divider resistance R1, R2, R3 dividing potential drop, and another road is added on the two poles of the earth of pumping lamp L through the inferior limit of current-limiting resistance R4, triggering transformer T.When laser equipment sends the pre-burning signal, contactor normally opened contact KM adhesive conducting, capacitor C is by the former limit instantaneous discharge of contactor KM, triggering transformer T, at the high pressure that triggers about transformer time two ends, limit generation 15KV, moment punctures the gas striking of pumping lamp inside, and the input A of pre-burning circuit, the terminal voltage of B, after current-limiting resistance R4 and inferior margin that triggers transformer T flow, in time keep pumping lamp arc light state, wait for that output C, the D of main circuit sends into pulse high current.There is following defective in the shortcoming of this circuit: resistance was at most 2 ohm after 1) pumping lamp punctured striking, the loss power of current-limiting resistance R4 is very large, need many high-power resistance connection in series-parallel to use, not only volume is large, also need to configure cooling structure, especially keep electric current and generally can only be arranged in the 500mA, this electric current is difficult to keep arc length greater than the arc light state of the pumping lamp of 140mm; 2) high pressure of high pressure triggering arc ignition circuit generation is loaded into output C, the D of main circuit simultaneously; the main circuit part must configuration be prevented high tension protection circuit; to guarantee that each circuit of laser equipment is not damaged by high pressure; and; high pressure about the 15KV that high pressure triggering arc ignition circuit produces is difficult to puncture arc length greater than the gas striking of the pumping lamp inside of 140mm, causes laser equipment to occur by the bad problem of the unsuccessful pre-burning that causes of striking.
Summary of the invention
Technical problem to be solved in the utility model is the defective that remedies above-mentioned prior art, and a kind of laser equipment pumping lamp pre-burning circuit is provided.
Technical problem of the present utility model is solved by the following technical programs.
This laser equipment pumping lamp pre-burning circuit comprises that high pressure triggers arc ignition circuit and little electric current arc light holding circuit.
The characteristics of this laser equipment pumping lamp pre-burning circuit are:
It is that the high pressure that has additional voltage source in the small-power triggers arc ignition circuit that described high pressure triggers arc ignition circuit, is connected with following three road circuit in the described small-power between the positive output end of voltage source and the negative output terminal:
One tunnel charging circuit that is formed by the first divider resistance, the second divider resistance, the 3rd divider resistance and the electric capacity in parallel with the 3rd divider resistance that connect successively, the two ends of described electric capacity are connected with the series arm that is comprised of contactor normally opened contact and the former limit of triggering transformer, one end on described triggering transformer time limit is arranged on the periphery of pumping lamp, and the other end is connected with the earth;
The charging circuit that another road is comprised of the first divider resistance that connects successively and series capacitance group;
One tunnel arc ignition circuit that is formed by the first divider resistance, current-limiting resistance and the pumping lamp that connect successively again, the pumping lamp negative pole connects publicly, and described current-limiting resistance is to guarantee to discharge the current-limiting resistance of immediate current greater than 20A;
The negative output terminal of voltage source namely is connected publicly with the negative input end of pre-burning circuit in the described small-power, and the control end of voltage source connects laser equipment starting-up signal output in the described small-power.
Described little electric current arc light holding circuit is the BUCK constant-current circuit that comprises pulse-width modulation (Pulse Width Modulation, initialism are PWM) controller.
In the described small-power voltage source its be controlled by the laser equipment starting-up signal, when laser equipment sends starting-up signal, voltage source work in the small-power, be the capacitor charging in parallel with the 3rd divider resistance after first divider resistance of voltage source one tunnel through connecting successively, the second divider resistance, the 3rd divider resistance dividing potential drop in the small-power, another road first divider resistance charges to the series capacitance group, and be connected to the pumping lamp positive pole by current-limiting resistance, one the tunnel to be connected pumping lamp with current-limiting resistance through the first divider resistance anodal again, and the pumping lamp negative pole connects publicly.When laser equipment sends the pre-burning signal, contactor normally opened contact adhesive conducting, moment produces high voltage electric field on the inferior limit of triggering transformer, be applied between pumping lamp periphery and the earth, can puncture arc length moment greater than the gas of the pumping lamp inside of 140mm, reliable striking effectively solves laser equipment and occurs by the bad problem of the unsuccessful pre-burning that causes of striking.Because the middle pressure that the series capacitance group is full of is applied to the positive pole of pumping lamp already by current-limiting resistance, when aura produces, because two electrode resistance moments of pumping lamp diminish, electric energy in the series capacitance group forms arc light by current-limiting resistance moment acceleration pumping lamp gas ionization, kept afterwards the arc light state of pumping lamp by the BUCK constant-current circuit that comprises the PWM controller, finish pre-burning.
Technical problem of the present utility model is solved by following further technical scheme.
The described BUCK constant-current circuit that comprises the PWM controller, formed by PWM controller, switching tube, inductance, anti-high-voltage diode, fly-wheel diode and current sensor, the magnitude of voltage of the reference point by regulating the PWM controller, can conveniently regulate pumping lamp and keep current value, the adjusting current range is 0.1A ~ 5.5A, and circuit loss is low, and caloric value is little, and switching tube only need configure the small heat-dissipating device.
Voltage source in the described small-power is a kind of in Switching Power Supply, DC Module power supply and the AC transformer rectifier power source.Described middle pressure is 1.0KV ~ 1.6KV.Described small-power is 5 watts at the most.
Described series capacitance group is that total capacity is the series capacitance group of at least 20 μ F.
Described series capacitance group is the series capacitance group that the electrochemical capacitor by three withstand voltage 450V of being at least is composed in series, and the series capacitance group can not damaged when pressing as 1.6KV in to guarantee.
The utility model beneficial effect compared with prior art is: owing to having additional voltage source in the small-power, can puncture arc length moment greater than the gas of the pumping lamp inside of 140mm, reliable striking effectively solves laser equipment and occurs by the bad problem of the unsuccessful pre-burning that causes of striking.Keep electric current, can keep current value by Set arbitrarily and adopt the BUCK constant-current circuit to provide to pumping lamp, can satisfy arc length greater than the pumping lamp of 140mm to keeping the requirement of electric current, and loss is little, power consumption is 25% of primary circuit under the same current, does not need to design separately cooling structure, and volume is little.Also owing to directly being connected with the output of main circuit without high-tension circuit, the main circuit part needn't configure anti-high tension protection circuit, can significantly reduce the cost of laser equipment, further improves reliability and the fail safe of laser equipment.
Description of drawings
Fig. 1 is existing laser equipment pumping lamp pre-burning circuit diagram;
Fig. 2 is the circuit diagram of the utility model embodiment.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the utility model is described.
A kind of as shown in Figure 2 be used for the laser equipment arc length greater than the pre-burning circuit of the pumping lamp of 140mm, comprise that high pressure triggers arc ignition circuit and little electric current arc light holding circuit.
It is to have additional the high pressure of pressing the 1KV Switching Power Supply in 5 watts to trigger arc ignition circuit that high pressure triggers arc ignition circuit, presses in 5 watts and is connected with following three road circuit between the positive output end of 1KV Switching Power Supply and the negative output terminal:
One tunnel charging circuit that is comprised of the first divider resistance R1, the second divider resistance R3, the 3rd divider resistance R4 and the capacitor C 4 in parallel with the 3rd divider resistance R4 that connect successively charges to capacitor C 4.The two ends of capacitor C 4 are connected with the series arm that is comprised of contactor normally opened contact and the former limit of triggering transformer T2, and an end that triggers T2 limit of transformer is arranged on the periphery of pumping lamp L, and the other end is connected with the earth PE;
Another road is by the first divider resistance R1 that connects successively and to form total capacity by electrochemical capacitor C1, the C2 of three withstand voltage 450V of being at least and C3 be the charging circuit that the series capacitance group of at least 20 μ F forms, and charges to the series capacitance group;
One tunnel arc ignition circuit that is formed by the first divider resistance R1, the current-limiting resistance R2 that connect successively and pumping lamp L again, pumping lamp L negative pole connects publicly, and current-limiting resistance R2 guarantees to discharge the current-limiting resistance of immediate current greater than 20A;
Press the negative output terminal of 1KV Switching Power Supply namely to be connected publicly with the negative input end of pre-burning circuit in 5 watts, the control end connection laser equipment starting-up signal output of pressure 1KV Switching Power Supply in 5 watts.
Little electric current arc light holding circuit is the BUCK constant-current circuit that comprises the PWM controller, it is comprised of PWM controller U1, switching tube Q, inductance T1, anti-high-voltage diode D1, sustained diode 2 and current sensor U3, the magnitude of voltage of the reference point by regulating PWM controller U1, can conveniently regulate pumping lamp and keep current value, the adjusting current range is 0.1A ~ 5.5A, and its circuit loss is low, and caloric value is little, and switching tube Q only need configure the small heat-dissipating device.
When laser equipment sends starting-up signal, press the work of 1KV Switching Power Supply in 5 watts.When laser equipment sends the pre-burning signal, contactor normally opened contact KM adhesive conducting, moment produces high voltage electric field on the inferior limit of triggering transformer T2, it is applied between pumping lamp periphery and the earth PE, can puncture the gas of pumping lamp inside moment, reliable striking effectively solves laser equipment and occurs by the bad problem of the unsuccessful pre-burning that causes of striking.Because the middle pressure 1KV that the series capacitance group is full of is applied to the positive pole of pumping lamp L already by current-limiting resistance R2, when aura produces, because two electrode resistance moments of pumping lamp L diminish, electric energy in the series capacitance group accelerates pumping lamp L gas ionization formation arc light by current-limiting resistance R2 moment, kept afterwards the arc light state of pumping lamp L by the BUCK constant-current circuit that comprises the PWM controller, finish pre-burning.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; make without departing from the concept of the premise utility some alternative or obvious modification that are equal to; and performance or purposes are identical, all should be considered as belonging to the scope of patent protection that the utility model is determined by claims of submitting to.
Claims (7)
1. a laser equipment pumping lamp pre-burning circuit comprises high pressure triggering arc ignition circuit and little electric current arc light holding circuit, it is characterized in that:
It is that the high pressure that has additional voltage source in the small-power triggers arc ignition circuit that described high pressure triggers arc ignition circuit, is connected with following three road circuit in the described small-power between the positive output end of voltage source and the negative output terminal:
One tunnel charging circuit that is formed by the first divider resistance, the second divider resistance, the 3rd divider resistance and the electric capacity in parallel with the 3rd divider resistance that connect successively, the two ends of described electric capacity are connected with the series arm that is comprised of contactor normally opened contact and the former limit of triggering transformer, one end on described triggering transformer time limit is arranged on the periphery of pumping lamp, and the other end is connected with the earth;
The charging circuit that another road is comprised of the first divider resistance that connects successively and series capacitance group;
One tunnel arc ignition circuit that is formed by the first divider resistance, current-limiting resistance and the pumping lamp that connect successively again, the pumping lamp negative pole connects publicly, and described current-limiting resistance is to guarantee to discharge the current-limiting resistance of immediate current greater than 20A;
The negative output terminal of voltage source namely is connected publicly with the negative input end of pre-burning circuit in the described small-power, and the control end of voltage source connects laser equipment starting-up signal output in the described small-power;
Described little electric current arc light holding circuit is the BUCK constant-current circuit that comprises the pulse-width modulation PWM controller.
2. laser equipment pumping lamp pre-burning circuit as claimed in claim 1 is characterized in that:
The described BUCK constant-current circuit that comprises the PWM controller is comprised of PWM controller, switching tube, inductance, anti-high-voltage diode, fly-wheel diode and current sensor.
3. laser equipment pumping lamp pre-burning circuit as claimed in claim 1 is characterized in that:
Voltage source in the described small-power is a kind of in Switching Power Supply, DC Module power supply and the AC transformer rectifier power source.
4. laser equipment pumping lamp pre-burning circuit as claimed in claim 1 or 2 is characterized in that:
Described middle pressure is 1.0KV ~ 1.6KV.
5. laser equipment pumping lamp pre-burning circuit as claimed in claim 3 is characterized in that:
Described small-power is 5 watts at the most.
6. laser equipment pumping lamp pre-burning circuit as claimed in claim 4 is characterized in that:
Described series capacitance group is that total capacity is the series capacitance group of at least 20 μ F.
7. laser equipment pumping lamp pre-burning circuit as claimed in claim 5 is characterized in that:
Described series capacitance group is the series capacitance group that the electrochemical capacitor by three withstand voltage 450V of being at least is composed in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220199351 CN202663603U (en) | 2012-05-04 | 2012-05-04 | Pre-ignition circuit of pumping lamp of laser equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220199351 CN202663603U (en) | 2012-05-04 | 2012-05-04 | Pre-ignition circuit of pumping lamp of laser equipment |
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| Publication Number | Publication Date |
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| CN202663603U true CN202663603U (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220199351 Expired - Lifetime CN202663603U (en) | 2012-05-04 | 2012-05-04 | Pre-ignition circuit of pumping lamp of laser equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104244545A (en) * | 2014-09-15 | 2014-12-24 | 中国科学院上海光学精密机械研究所 | Triggering pre-burning device with xenon lamp |
-
2012
- 2012-05-04 CN CN 201220199351 patent/CN202663603U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104244545A (en) * | 2014-09-15 | 2014-12-24 | 中国科学院上海光学精密机械研究所 | Triggering pre-burning device with xenon lamp |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |
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| CX01 | Expiry of patent term |