CN211132737U

CN211132737U - OPT discharge control system capable of outputting uniform square waves

Info

Publication number: CN211132737U
Application number: CN201921514248.4U
Authority: CN
Inventors: 吴成顺; 王金录; 董家佐
Original assignee: Jilin Province King Laser Co ltd
Current assignee: Jilin Province King Laser Co ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-07-31
Anticipated expiration: 2029-09-11

Abstract

An OPT discharge control system capable of outputting uniform square waves relates to a discharge control system, and solves the problems in a strong pulse light control system in the prior art, and comprises a power supply, a control system, a xenon lamp, a pre-burning circuit component, an OPT module component, a charging function component, an energy storage circuit, a power switch driving circuit and a discharge component; the utility model discloses a set up OPT module subassembly and power tube in strong pulse light control system circuit, the power tube switches on and closes and goes on alternately, because the existence of inductance, the luminous intensity that flows through the xenon lamp slowly increases and reduces, after opening the power tube once more, this process appears repeatedly, the xenon lamp can be sent out light always; in addition, due to the existence of the inductor, the voltage loaded to two ends of the xenon lamp is reduced, in order to meet the requirement of outputting energy, the energy of the energy bank is increased by increasing the voltage of the energy bank, and when the same energy is released, the higher the energy of the energy bank is, the smaller the voltage drop is, and the closer the output light waveform is to the square wave.

Description

OPT discharge control system capable of outputting uniform square waves

Technical Field

The utility model relates to a discharge control system, concretely relates to OPT discharge control system of exportable even square wave.

Background

The medical intense pulse light therapeutic apparatus can realize the treatment of different pathological changes clinically by emitting a high-intensity and large-energy incoherent light source with a specific wavelength range. In the continuous discharging process, because the discharging energy of the capacitor is very large each time, the voltage drop of the capacitor is serious, and the capacitor energy cannot be charged to a set value in a short time in the subsequent discharging process, so that the consistency of the discharging energy is very poor. The consequence of this is that the first emitted pulse energy is often too large to burn the skin and the subsequent pulse energy is too low to render the treatment ineffective.

In order to solve the above technical problems, the medical company first proposed an OPT technique, which is also called perfect Pulse technique (Optimal Pulse Technology), and actually the OPT technique changes the light waveform into a very uniform square wave, so that the whole treatment process can be effectively controlled, and the energy peak exceeding the treatment energy at the beginning part is eliminated, thereby improving the safety. In the existing intense pulse light therapeutic apparatus, because the inductance is added in the loop, the leading edge of the light waveform is very slow, in order to overcome the problem, the common technical means is to increase the initial conducting pulse width of the pulse, and because the pulse width is certain, the leading edge has a peak, and the smaller the energy is, the higher the peak is, so that the hidden danger of treatment can be increased. In addition, the technical principle of the structure of the control system is extremely complex, the cost of circuit devices is very high, and the waveform of the intense pulse light can be ensured to form approximately uniform square waves by the complex control system.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a strong pulse light control system of exportable even square wave solves the problem that exists among the strong pulse light control system among the prior art, guarantees that the output light wave is even square wave, and its forward position does not have the peak back edge and does not have the decay.

A strong pulse light control system capable of outputting uniform square waves comprises a power supply, a control system, a xenon lamp, a pre-burning circuit component, an OPT module component, a charging function component, an energy storage circuit, a power switch driving circuit and a discharging component;

the control system pre-combusts the xenon lamp through the pre-combustion circuit component, and after the pre-combustion is successful, the pre-combustion circuit component sends a pre-combustion feedback signal to the control system;

the power supply charges the energy storage circuit through the charging functional assembly, the control system controls the energy storage circuit to stop charging after the charging reaches a preset value, and the charging is finished when the charging voltage of the energy storage circuit reaches the preset value;

the control system sends a driving signal to the power switch driving circuit, the power switch driving circuit controls the on and off of the discharge assembly, and the light-emitting intensity of the xenon lamp changes along with the current flowing through the main loop of the OPT module assembly.

The utility model has the advantages that:

1. the utility model discloses a set up OPT module subassembly and power tube in strong pulse light control system circuit, the power tube switches on and closes and goes on alternately, because the existence of inductance, the luminous intensity that flows through the xenon lamp slowly increases and reduces, after opening the power tube once more, this process appears repeatedly, the xenon lamp can be sent out light always; in addition, due to the existence of the inductor, the voltage loaded to two ends of the xenon lamp is reduced, in order to meet the requirement of outputting energy, the energy of the energy bank is increased by increasing the voltage of the energy bank, and when the same energy is released, the higher the energy of the energy bank is, the smaller the voltage drop is, and the closer the output light waveform is to the square wave.

2. The utility model discloses a set up the OPT protection circuit for the major loop and the xenon lamp can be protected rapidly to the sudden failure in the discharge process, when the electric current exceeded the permission upper limit, the OPT protection circuit can convey control signal to control system rapidly, and control system makes power tube drive circuit stop rapidly, protects the major loop.

3. The utility model discloses a set up discharge circuit protection circuit, adopted passive harmless buffering absorption circuit form, can make voltage and current waveform stagger during power switch work, make the two area of overlapping reduce, show and reduce switching loss, compare in the circuit of other modes, this kind of scheme does not increase the loss in main return circuit, so under the condition that same switching loss efficiency reduces, can obtain higher efficiency.

4. The utility model discloses a set up power switch protection circuit, parallelly connected bleeder resistor between power switch's grid and projecting pole prevents to add main power high voltage accidentally under the condition of not connecting the drive lead wire, burns out power switch through the miller effect.

Drawings

Fig. 1 is a schematic block diagram of an OPT discharge control system capable of outputting uniform square waves according to the present invention;

fig. 2 is an electrical diagram of a main circuit of an OPT discharge control system capable of outputting uniform square waves according to the present invention;

fig. 3 is a schematic diagram of electrical connection between the power switch driving circuit and the discharging component of the OPT discharging control system capable of outputting uniform square waves.

Detailed Description

First, the embodiment is described with reference to fig. 1 to 3, please refer to fig. 1, which is a schematic block diagram of an OPT discharge control system capable of outputting uniform square waves, as a key control part for realizing the conversion from electricity to light in a strong pulse light therapy apparatus, the light pulse waveform output by the control system is uniform square waves, the front edge of the light pulse waveform has no peak and the rear edge of the light pulse waveform has no attenuation, and the circuit principle has a simple structure and can be realized without a complex control system. The utility model relates to a strong pulse light control system of exportable even square wave comprises power 1, control system 2, xenon lamp 3, precombustion circuit subassembly 4, OPT module subassembly 5, the functional component that charges 6, tank circuit 7, power switch drive circuit 8, discharge assembly 9. The power supply 1 is electrically connected with the control system 2, the pre-burning circuit component 4 and the charging functional component 6 respectively and supplies power to the systems or the components; the control system 2 is in bidirectional connection with the pre-burning circuit component 4, the pre-burning circuit component 4 is electrically connected with one end of the xenon lamp 3, and the other end of the xenon lamp 3 is connected with one end of the OPT module component 5; the control system 2 is also electrically connected with the charging functional component 6, the charging functional component 6 is electrically connected with the energy storage circuit 7, and the energy storage circuit 7 is electrically connected with the other end of the OPT module component 5 and provides energy for the OPT module component 5; the control system 2 is electrically connected with the power switch driving circuit 8, the power switch driving circuit 8 is connected with the discharging assembly 9, and the discharging assembly 9 is electrically connected with the OPT module assembly 5. The control system 2 is a control board STM 32.

The discharge control system in this embodiment further includes a power switch protection circuit 10 electrically connected to the power switch drive circuit 8 and the discharge unit 9, and a discharge circuit protection circuit 11 electrically connected to the discharge unit.

In this embodiment, the OPT module assembly is comprised of an OPT regulation circuit with an OPT protection circuit.

The specific working process of the discharge control system according to the embodiment is as follows: firstly, a power supply 1 is electrified, and a control system 2 checks whether all circuits are in a normal state after being started to carry out power-on self-test; after self-checking is completed, the control system 2 controls the pre-burning circuit component 4 to work, so that the xenon lamp 3 pre-burns, and feeds back a pre-burning success signal of the control system 2, after the xenon lamp 3 successfully pre-burns, the control system 2 controls the charging function component 6 to work, so as to charge the energy storage circuit 7, when the charging voltage of the energy storage circuit 7 reaches a set value, charging is completed, at the moment, the OPT circuit 5 enters a preparation state, the control system 2 controls the power switch driving circuit 8 to output a driving signal, the discharging component 9 and the OPT module component 5 work simultaneously, the xenon lamp 3 emits light, and in the light emitting process, the power switch protection circuit 10 and the discharging protection circuit 11 also work simultaneously. The charging functional component 6 is a laser power supply.

Referring to fig. 2, the embodiment is described, where the pre-burning circuit assembly 4 includes a transformer T1, a rectifier diode D6, and an inductor L3, an anode of the transformer T1 is connected to the rectifier diode D6, another end of the rectifier diode D6 is connected to one end of the inductor L3, another end of the inductor L3 is connected to an anode of the xenon lamp 3 and the power VCC, a cathode of the xenon lamp is connected to a cathode of the transformer T1 and an OPT module assembly, and the OPT module assembly includes a regulating circuit with an OPT protection circuit, where the OPT protection circuit is a current transformer (not shown in the figure), the OPT regulating circuit includes a reverse diode D4 and a first L C oscillating circuit, the first L C oscillating circuit includes a first inductor L1 and an acceleration capacitor C3, which are arranged in parallel, and another end of the OPT module assembly is electrically connected to a collector of the power switch.

The discharge circuit protection circuit comprises a resistor R1 and a resistor R2 connected with a point B of the power switch, a diode D3 connected with the other end of the resistor R1, a capacitor C1 and a diode C5 respectively connected with a point C of an output end 3 of the diode D3, an inductor L connected with an output end of the diode C5, a resistor R3 connected with the other end of the inductor L, a capacitor C2 and a diode D2 respectively connected with a point D of the other end of the resistor R2, the other end of the capacitor C2 is connected with the other end of the resistor R968 and an input end of a diode D collector D6, an output end of the diode D1 is connected with the other end of the resistor R2 and an input end of the diode D collector D6, and an output end of the diode D1 is connected with a source VCC, a negative electrode of a power source is connected with a positive electrode of the power source, a positive electrode of the capacitor C3 7 is connected with a high-voltage storage capacitor C1 and a positive electrode of the power switch 3673727.

Referring to fig. 3 to explain the present embodiment, fig. 3 is a schematic diagram of electrical connection between a power switch driving circuit and a discharging component, the power switch driving circuit is composed of a driving chip (KA962) and a corresponding peripheral control circuit, the discharging component is an IGBT or an IPM switching device, and the specific connection relationship is as follows: a Detect pin of the driving chip is connected with one end of a resistor Rj, the other end of the resistor Rj is sequentially connected with two high-voltage isolation diodes Dhv, the high-voltage isolation diode Dhv is connected with a collector C of the power switch,

the output end VO of the driving chip is connected with one end of a resistor Rg, the other end of the resistor Rg is connected with a base electrode of the power switch and one end of a bleeder resistor Rge, and the other end of the bleeder resistor Rge is connected with an emitter electrode E of the power switch;

a reference end Com of the driving chip is connected with one end of the resistor Re, and a reverse voltage stabilizing diode Df is arranged between a detection end Detect of the driving chip and an emitter E of the power switch; the other end of the resistor Re is connected with the middle points of the two electrolytic capacitors CC and Ce, is connected with the voltage stabilizing diode Df, and is finally connected with the emitting electrode E and the discharging resistor Rge of the power switch.

In the present embodiment, the power switch protection circuit 10 is composed of a bleeder resistor Rge connected in parallel between the gate and the emitter of the IGBT.

Claims

1. An OPT discharge control system capable of outputting uniform square waves comprises a power supply (1), a control system (2), a xenon lamp (3), a pre-burning circuit component (4), an OPT module component (5), a charging function component (6), an energy storage circuit (7), a power switch driving circuit (8) and a discharge component (9); the method is characterized in that:

the control system (2) pre-combusts the xenon lamp (3) through the pre-combustion circuit component (4), and after the pre-combustion is successful, the pre-combustion circuit component (4) sends a pre-combustion feedback signal to the control system (2);

the power supply (1) charges the energy storage circuit (7) through the charging functional component (6), meanwhile, the control system (2) controls the energy storage circuit (7) to stop charging after the charging reaches a preset value, and when the charging voltage of the energy storage circuit (7) reaches the preset value, the charging is finished;

the control system (2) sends a driving signal to the power switch driving circuit (8), the power switch driving circuit (8) controls the on and off of the discharge assembly (9), and the light emitting intensity of the xenon lamp (3) changes along with the current flowing through the main loop of the OPT module assembly (5).

2. The OPT discharge control system capable of outputting the uniform square wave according to claim 1, further comprising a power switch protection circuit (10) and a discharge loop protection circuit (11); the power switch protection circuit (10) and the discharge loop protection circuit (11) are connected with the discharge assembly (9).

3. The OPT discharge control system capable of outputting the uniform square wave as claimed in claim 2, wherein the power switch protection circuit (10) is a bleeder resistor connected between the grid and the emitter of the discharge assembly (9).

4. The OPT discharge control system capable of outputting the uniform square wave according to claim 2, wherein the discharge loop protection circuit (11) comprises a resistor R1, a resistor R2, a resistor R3, a diode D1, a diode D2, a diode D3, a diode D5, a capacitor C1, a capacitor C2, an inductor L2 and a high voltage source VCC;

one end of the resistor R1 is connected with the collector terminal of the power switch and one end of the resistor R2, the other end of the resistor R1 is connected with the input end of the diode D3, the output end of the diode D3 is connected with the input ends of the capacitors C1 and the diode D5, the output end of the diode D5 is connected with one end of the inductor L2, the other end of the inductor L2 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with one end of the capacitor C2 and the input end of the diode D2, the other end of the capacitor C2 is connected with the other end of the resistor R2 and the input end of the diode D1, the output end of the diode D1 is connected with the high-voltage source VCC, the output end of the diode D2 is connected with the positive electrodes of the high-voltage power source VCC and the energy storage capacitor, and the other end of the capacitor C1.

5. The OPT discharge control system capable of outputting uniform square waves as claimed in claim 1, wherein the pre-burning circuit component (4) is composed of a transformer T1, a rectifier diode D6 and an inductor L3, the anode of the transformer T1 is connected with the rectifier diode D6, the other end of the rectifier diode D6 is connected with one end of the inductor L3, the other end of the inductor L3 is connected with the anode of the xenon lamp (3) and a high-voltage power supply VCC, and the cathode of the xenon lamp is connected with the cathode of the transformer T1 and the OPT module component.

6. The OPT discharge control system capable of outputting uniform square waves as claimed in claim 1, wherein the power switch driving circuit (8) is composed of a driving chip and a peripheral control circuit connected with pins of the driving chip.

7. The OPT discharge control system capable of outputting uniform square waves according to claim 6, wherein the specific connection relationship between the driving chip and the peripheral control circuit is as follows: a Detect pin of the driving chip is connected with one end of a resistor Rj, the other end of the resistor Rj is sequentially connected with two high-voltage isolation diodes Dhv, the high-voltage isolation diode Dhv is connected with a collector C of the power switch,

8. The OPT discharge control system capable of outputting the uniform square wave as claimed in claim 1, characterized in that the OPT module assembly (5) is composed of an OPT regulating circuit with an OPT protection circuit.

9. The OPT discharge control system capable of outputting uniform square waves of claim 8, wherein the OPT regulating circuit comprises series reverse diodes D4 and L C oscillating circuit, and the L C oscillating circuit comprises parallel inductor L1 and accelerating capacitor C3.

10. The OPT discharge control system capable of outputting uniform square waves according to any one of claims 1-9, characterized in that the discharge component (9) is an IGBT or IPM switching device.