CN203071393U

CN203071393U - Laser power supply

Info

Publication number: CN203071393U
Application number: CN 201220733374
Authority: CN
Inventors: 游利兵; 余吟山; 王庆胜; 厉彦超; 方晓东
Original assignee: Anhui Institute of Optics and Fine Mechanics of CAS
Current assignee: Anhui Institute of Optics and Fine Mechanics of CAS
Priority date: 2012-12-27
Filing date: 2012-12-27
Publication date: 2013-07-17
Anticipated expiration: 2022-12-27

Abstract

The utility model discloses a laser power supply, which is composed of a direct current source, a resonance charging circuit, a silicon controlled rectifier switch, energy-storage capacitors, a pulse transformer and magnistors. The direct current source is connected with a filtering capacitor. The energy-storage capacitors are charged in a dual-voltage way through the resonance charging circuit. Low-voltage broad pulses are formed after electric discharge is performed through the silicon controlled rectifier switch. The low-voltage broad pulses have the voltage boosted through the pulse transformer. The high-voltage broad pulses are compressed through one or two-stage magnetic pulse compression switches. Then high-voltage narrow pulses are formed and output to the two ends of a laser discharge electrode. Thus discharge excitation on laser light working gas is achieved. The power supply can work within a range between 1Hz to 300Hz. The laser power supply can be widely applied to high-voltage quick-discharge excitation gas lasers. High-voltage switch parts such as thyratrons, etc. are not used. The laser power supply which has the characteristics of simple structure, low manufacture cost and long service lifetime adopts the silicon controlled rectifier as the main switch and only costs about 2 thousand to 3 thousand RMB. Furthermore, the laser power supply has a service lifetime about 10 (11). Therefore, the cost is significantly lowered while the service lifetime of the laser power supply is significantly prolonged.

Description

A kind of Laser Power Devices

Technical field

The utility model relates to a kind of power supply, relates in particular to a kind of Laser Power Devices.

Background technology

The fast electric discharge excited gaseous lasers of high pressure such as carbon dioxide laser, excimer laser, nitrogen molecular laser need be exported the high-voltage pulse power source of about 10kV-30kV, and need high-voltage switch gears such as thyratron, gap as high-voltage discharging switch.This class high-voltage laser power supply uses more high pressure components and parts, and cost is higher, and high-voltage switch gear component lifes such as thyratron, gap are shorter, the steady operation limited time.

The utility model content

The utility model purpose is exactly in order to remedy the defective of prior art, a kind of low cost, long-life Laser Power Devices to be provided.

The utility model is achieved through the following technical solutions:

A kind of Laser Power Devices, include DC power supply U, the input of described DC power supply U connects civil power, filter capacitor C0, inductance L, small-power reverse-blocking tetrode thyristor S1, diode D1 and capacitor C 1 are composed in series LC resonant charging loop, described filter capacitor C0 is in parallel with DC power supply U, filter capacitor C0 be connected with capacitor C 1, one end of capacitor C 1 connects an end of the primary side of pulse transformer T, the other end of the primary side of pulse transformer T connects high-power silicon controlled rectifier switch S 2, high-power silicon controlled rectifier switch S 2 is connected with the other end of capacitor C 1, one end of the secondary side of pulse transformer T connects the negative pole of non-return diode D2, the positive pole of non-return diode D2 connects an end of capacitor C 2, the other end of capacitor C 2 connects the other end of the secondary side of pulse transformer T, capacitor C 3 is connected in parallel on the two ends of capacitor C 2, capacitor C d is connected in parallel on the two ends of capacitor C 3, between capacitor C 2 and capacitor C 3, be connected with magnetic switch MS1, be connected with magnetic switch MS2 between capacitor C 3 and the capacitor C d, the end ground connection of capacitor C d, the two ends of capacitor C d are high-voltage output end, closure by control small-power reverse-blocking tetrode thyristor S1, capacitor C 1 is charged to the highest nearly 1400V, 2 conductings of high-power silicon controlled rectifier switch S, capacitor C 1 is by capacitor C 2 chargings of pulse transformer T, at capacitor C 2 voltages gradually in the elevation process, magnetic switch MS1 is in unsaturated state, is approximately and opens circuit; When capacitor C 2 voltages reached the highest, magnetic switch MS1 was just in time saturated, and this moment, MS1 was approximately a hollow small inductor, and capacitor C 2 is fast to capacitor C 3 discharges; Through the compression process of magnetic switch MS2, the voltage rise time on the capacitor C d reaches about 100ns, and the working gas discharge pumped is produced laser.

The modes of emplacement of the iron core of described pulse transformer T be primary coil around the centre, two secondary coils are around both sides, this modes of emplacement can have bigger space to place winding coil, is conducive to insulation and heat radiation.Because only about 5 μ s, the electric current skin effect is remarkable for the pulse transformer energy transfer time, peak current is bigger in addition, and therefore general lead loss is bigger.In the utility model, primary adopts the sheet copper coiling, and the coiling of secondary employing litz wire can effectively reduce the loss that skin effect is brought, and the transformer energy transmission efficiency reaches more than 90%.

The magnetic core of described magnetic switch and skeleton structure are that magnetic core is the nanocrystalline material magnet ring of high squareness ratio, each magnetic switch uses 3 magnet rings to pile up, three magnet rings are fixed on the fixed mount, the middle plastics pillar that adopts passes, and each magnet ring outside is with insulation and protects box, and two makes clamping plate and clamps magnet ring, middle plastic column subcenter is opened an aperture, magnetic core resetting current lead therefrom passes, such magnetic switch compact conformation, good insulation preformance.

The first order switch leads number of turns of described magnetic switch is at the 30-40 circle, two groups of two groups of coil symmetries around both sides, compare the coiling mode of single winding, can effectively reduce magnetic switch resistance like this, reduce loss, also be conducive to the even use of magnetic core; The second level switch leads number of turn is at the 4-6 circle, two groups of two groups of coil symmetries around both sides, if the number of turn is less, the words that the space allows, can also improve the mode of 4 groups of parallel connections of title and carry out coiling, so more can reduce magnetic switch resistance, also be more conducive to the even use of core material.

The capacitance of filter capacitor C0 is C0=200uF, the capacitance of capacitor C 1 is C1=2.5uF, and the capacitance of capacitor C 2, C3 is C2=C3=10nF, and the capacitance of capacitor C d is Cd=8nF, the output voltage of DC power supply U is 500-700V, and pulse transformer T is that no-load voltage ratio is the step-up transformer of 1:16.

The utility model has the advantages that: the utility model has designed a kind of low cost, long-life Laser Power Devices, can be widely used in the fast electric discharge excited gaseous laser of high pressure, do not use high-voltage switch gear parts such as thyratron, power supply architecture is simple, cost of manufacture is low, long service life, use controllable silicon as main switch, price has only thousand yuan of 2-3, and the life-span about 10 ¹¹, therefore become instinct to reduce greatly, the life-span can also be greatly improved.

Description of drawings

Fig. 1 is laser power supply circuit structural representation of the present utility model.

Fig. 2 is capacitor C 1 two ends charge waveforms schematic diagram.

Fig. 3 is the pulse transformer T schematic diagram of placing unshakable in one's determination.

Fig. 4 is the magnetic switch sectional structure chart.

Fig. 5 is first order magnetic switch switch leads schematic diagram.

Fig. 6 is second level magnetic switch switch leads schematic diagram.

Fig. 7 is capacitor C 2, C3, Cd both end voltage waveform.

Embodiment

As shown in Figure 1, a kind of Laser Power Devices, include DC power supply U, the input of described DC power supply U connects civil power, filter capacitor C0, inductance L, small-power reverse-blocking tetrode thyristor S1, diode D1 and capacitor C 1 are composed in series LC resonant charging loop, described filter capacitor C0 is in parallel with DC power supply U, filter capacitor C0 be connected with capacitor C 1, one end of capacitor C 1 connects an end of the primary side of pulse transformer T, the other end of the primary side of pulse transformer T connects high-power silicon controlled rectifier switch S 2, high-power silicon controlled rectifier switch S 2 is connected with the other end of capacitor C 1, one end of the secondary side of pulse transformer T connects the negative pole of non-return diode D2, the positive pole of non-return diode D2 connects an end of capacitor C 2, the other end of capacitor C 2 connects the other end of the secondary side of pulse transformer T, capacitor C 3 is connected in parallel on the two ends of capacitor C 2, capacitor C d is connected in parallel on the two ends of capacitor C 3, between capacitor C 2 and capacitor C 3, be connected with magnetic switch MS1, be connected with magnetic switch MS2 between capacitor C 3 and the capacitor C d, the end ground connection of capacitor C d, the two ends of capacitor C d are high-voltage output end, closure by control small-power reverse-blocking tetrode thyristor S1, capacitor C 1 is charged to the highest nearly 1400V, 2 conductings of high-power silicon controlled rectifier switch S, capacitor C 1 is by capacitor C 2 chargings of pulse transformer T, at capacitor C 2 voltages gradually in the elevation process, magnetic switch MS1 is in unsaturated state, is approximately and opens circuit; When capacitor C 2 voltages reached the highest, magnetic switch MS1 was just in time saturated, and this moment, MS1 was approximately a hollow small inductor, and capacitor C 2 is fast to capacitor C 3 discharges; Through the compression process of magnetic switch MS2, the voltage rise time on the capacitor C d reaches about 100ns, and the working gas discharge pumped is produced laser.

As shown in Figure 3, the modes of emplacement of the iron core of described pulse transformer T be primary coil 1 around the centre, two secondary coils 2 are around both sides, this modes of emplacement can have bigger space to place winding coil, is conducive to insulation and heat radiation.Because only about 5 μ s, the electric current skin effect is remarkable for pulse transformer T energy transfer time, peak current is bigger in addition, and therefore general lead loss is bigger.In the utility model, the coiling of the elementary employing sheet copper of pulse transformer T, the coiling of secondary employing litz wire can effectively reduce the loss that skin effect is brought, and the transformer energy transmission efficiency reaches more than 90%.

As shown in Figure 4, the magnetic core of described magnetic switch and skeleton structure are that magnetic core is the nanocrystalline material magnet ring 3 of high squareness ratio, each magnetic switch uses 3 magnet rings 3 to pile up, and three magnet rings 3 are fixed on the fixed mount 6, and the middle plastics pillar 4 that adopts passes, each magnet ring 3 outside is with insulation and protects box 7, two makes clamping plate 5 and clamps magnet ring 3, and an aperture is opened at middle plastics pillar 4 centers, and magnetic core resetting current lead therefrom passes, such magnetic switch compact conformation, good insulation preformance.

As shown in Figure 5, first order switch leads 8 number of turns of described magnetic switch are at the 30-40 circle, two groups of two groups of coil symmetries around both sides, compare the coiling mode of single winding, can effectively reduce magnetic switch resistance like this, reduce loss, also be conducive to the even use of magnetic core; As shown in Figure 6, switch leads 8 numbers of turn in the second level are at the 4-6 circle, two groups of two groups of coil symmetries around both sides, if the number of turn is less, the space allows, and can also improve to claim the mode of 4 groups of parallel connections to carry out coiling, so more can reduce magnetic switch resistance, also be more conducive to the even use of core material.

As shown in Figure 7, capacitor C 2, C3, Cd both end voltage waveform, after the compression of two-stage magnetic switch, when high-voltage pulse arrived the sparking electrode two ends, the rise time was compressed to about 100 ns, the about 14-17kV of voltage magnitude.

Claims

1. Laser Power Devices, it is characterized in that: include DC power supply U, the input of described DC power supply U connects civil power, filter capacitor C0, inductance L, small-power reverse-blocking tetrode thyristor S1, diode D1 and capacitor C 1 are composed in series LC resonant charging loop, described filter capacitor C0 is in parallel with DC power supply U, filter capacitor C0 be connected with capacitor C 1, one end of capacitor C 1 connects an end of the primary side of pulse transformer T, the other end of the primary side of pulse transformer T connects high-power silicon controlled rectifier switch S 2, high-power silicon controlled rectifier switch S 2 is connected with the other end of capacitor C 1, one end of the secondary side of pulse transformer T connects the negative pole of non-return diode D2, the positive pole of non-return diode D2 connects an end of capacitor C 2, the other end of capacitor C 2 connects the other end of the secondary side of pulse transformer T, capacitor C 3 is connected in parallel on the two ends of capacitor C 2, capacitor C d is connected in parallel on the two ends of capacitor C 3, between capacitor C 2 and capacitor C 3, be connected with magnetic switch MS1, be connected with magnetic switch MS2 between capacitor C 3 and the capacitor C d, the end ground connection of capacitor C d, the two ends of capacitor C d are high-voltage output end, closure by control small-power reverse-blocking tetrode thyristor S1, capacitor C 1 is charged to the highest nearly 1400V, 2 conductings of high-power silicon controlled rectifier switch S, capacitor C 1 is by capacitor C 2 chargings of pulse transformer T, at capacitor C 2 voltages gradually in the elevation process, magnetic switch MS1 is in unsaturated state, is approximately and opens circuit; When capacitor C 2 voltages reached the highest, magnetic switch MS1 was just in time saturated, and this moment, MS1 was approximately a hollow small inductor, and capacitor C 2 is fast to capacitor C 3 discharges; Through the compression process of magnetic switch MS2, the voltage rise time on the capacitor C d reaches about 100ns, and the working gas discharge pumped is produced laser.

2. a kind of Laser Power Devices according to claim 1 is characterized in that: the modes of emplacement of the iron core of described pulse transformer T be primary coil around the centre, two secondary coils are around both sides.

3. a kind of Laser Power Devices according to claim 1, it is characterized in that: the magnetic core of described magnetic switch and skeleton structure are that magnetic core is the nanocrystalline material magnet ring of high squareness ratio, each magnetic switch uses 3 magnet rings to pile up, three magnet rings are fixed on the fixed mount, the middle plastics pillar that adopts passes, and each magnet ring outside is with insulation and protects box, and two makes clamping plate and clamps magnet ring, middle plastic column subcenter is opened an aperture, and magnetic core resetting current lead therefrom passes.

4. a kind of Laser Power Devices according to claim 1 is characterized in that: the first order switch leads number of turns of described magnetic switch is at the 30-40 circle, two groups of two groups of coil symmetries around both sides; The second level switch leads number of turn is at the 4-6 circle, two groups of two groups of coil symmetries around both sides.

5. a kind of Laser Power Devices according to claim 1, it is characterized in that: the capacitance of filter capacitor C0 is C0=200uF, the capacitance of capacitor C 1 is C1=2.5uF, the capacitance of capacitor C 2, C3 is C2=C3=10nF, the capacitance of capacitor C d is Cd=8nF, the output voltage of DC power supply U is 500-700V, and pulse transformer T is that no-load voltage ratio is the step-up transformer of 1:16.