CN220209963U - Laser galvanometer protection circuit, laser galvanometer protection device and processing equipment - Google Patents
Laser galvanometer protection circuit, laser galvanometer protection device and processing equipment Download PDFInfo
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- CN220209963U CN220209963U CN202321565056.2U CN202321565056U CN220209963U CN 220209963 U CN220209963 U CN 220209963U CN 202321565056 U CN202321565056 U CN 202321565056U CN 220209963 U CN220209963 U CN 220209963U
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Abstract
The application relates to a laser galvanometer protection circuit, laser galvanometer protection device and processing equipment, wherein the circuit includes: the charging and discharging module comprises a first power supply voltage receiving end and a discharging voltage output end, and the first power supply voltage receiving end is connected with the output end of the power supply; the front-stage switch module comprises a discharge voltage receiving end and a driving voltage output end, and the discharge voltage receiving end is connected with the discharge voltage output end of the charge-discharge module; the rear-stage switch module comprises a driving voltage receiving end, a second power supply voltage receiving end and a power supply voltage output end, wherein the driving voltage receiving end is connected with the driving voltage output end of the front-stage switch module, the second power supply voltage receiving end is connected with the output end of the power supply, and the power supply voltage output end is connected with the power supply input end of the laser galvanometer. The circuit realizes slow power-on of the front-stage switch module and the rear-stage switch module based on the charging and discharging characteristics of the charging and discharging module at the moment of power-on of the laser galvanometer, thereby inhibiting the occurrence of peak current.
Description
Technical Field
The application relates to the field of laser processing, in particular to a laser galvanometer protection circuit, a laser galvanometer protection device and processing equipment.
Background
Along with the continuous development of laser processing technology and the continuous and abundant application scenes of laser processing products, the requirements on laser processing precision are higher and higher. The laser galvanometer driver is used as an important driving component for laser processing and is important to ensure the laser processing precision.
The conventional laser galvanometer driver can generate peak current at the moment of power-on, so that the laser galvanometer is impacted greatly, and the laser processing precision is seriously affected.
Disclosure of Invention
In view of the above, it is necessary to provide a laser galvanometer protection circuit, a laser galvanometer protection device, and a processing apparatus.
A laser galvanometer protection circuit comprising:
the charging and discharging module comprises a first power supply voltage receiving end and a discharging voltage output end, wherein the first power supply voltage receiving end is used for being connected with the output end of the power supply;
the front-stage switch module comprises a discharge voltage receiving end and a driving voltage output end, and the discharge voltage receiving end is connected with the discharge voltage output end of the charge-discharge module;
the rear-stage switch module comprises a driving voltage receiving end, a second power supply voltage receiving end and a power supply voltage output end, wherein the driving voltage receiving end is connected with the driving voltage output end of the front-stage switch module, the second power supply voltage receiving end is used for being connected with the output end of the power supply, and the power supply voltage output end is used for being connected with the power supply input end of the laser galvanometer.
In one embodiment, the charge and discharge module includes:
the first voltage dividing unit is used for outputting divided power supply voltage through the connection of the first power supply voltage receiving end and the output end of the power supply;
and the charge-discharge unit is connected with the first voltage division unit and is connected with the discharge voltage receiving end of the front-stage switch module through the discharge voltage output end.
In one embodiment, the first voltage dividing unit includes a first resistor, a first end of the first resistor is connected to the output end of the power supply, and a second end of the first resistor is connected to the charge and discharge unit.
In one embodiment, the charge-discharge unit includes a second resistor and a first capacitor, a first end of the second resistor is connected to the first voltage dividing unit, a second end of the second resistor is connected to a first end of the first capacitor and a discharge voltage receiving end of the pre-stage switch module, and a second end of the first capacitor is grounded.
In one embodiment, the pre-stage switch module includes:
the front-stage switch unit is connected with the discharge voltage output end of the charge-discharge module through the discharge voltage receiving end, is connected with the drive voltage receiving end of the rear-stage switch module through the drive voltage output end, and is used for receiving the discharge voltage, and outputting the drive voltage to the drive voltage output end when the discharge voltage is larger than the first conduction voltage.
In one embodiment, the pre-stage switching unit includes a third resistor and a first switching tube, a first end of the first switching tube is connected with a discharge voltage output end of the charge-discharge module, a second end of the first switching tube is connected with a first end of the third resistor, a second end of the third resistor is grounded, and a third end of the first switching tube is connected with a driving voltage receiving end of the post-stage switching module.
In one embodiment, the post-stage switch module includes:
the second voltage division unit is connected with the driving voltage output end of the front-stage switch module through a driving voltage receiving end and outputs divided driving voltage;
the rear-stage switch unit is used for being connected with the second voltage division unit, being connected with the output end of the power supply through the second power supply voltage receiving end, being connected with the power supply input end of the laser galvanometer through the power supply voltage output end, receiving the divided driving voltage and the power supply voltage, and outputting the power supply voltage to the laser galvanometer when the difference value between the divided driving voltage and the power supply voltage is larger than a second conducting voltage.
In one embodiment, the second voltage division unit includes a fourth resistor, a first end of the fourth resistor is connected to the driving voltage output end of the preceding stage switch module, and a second end of the fourth resistor is connected to the output end of the power supply.
In one embodiment, the rear-stage switching unit includes a second switching tube, a first pin, a second pin and a third pin of the second switching tube are all connected with the output end of the power supply, a fourth pin of the second switching tube is connected with the second voltage division unit, and a fifth pin, a sixth pin, a seventh pin and an eighth pin of the second switching tube are all connected with the power input end of the laser galvanometer.
A laser galvanometer protection device comprising:
such as the laser galvanometer protection circuit described above.
A processing apparatus comprising:
such as the laser galvanometer protection circuit described above.
Above-mentioned laser galvanometer protection circuit, laser galvanometer protection device and processing equipment, wherein laser galvanometer protection circuit includes: the charging and discharging module comprises a first power supply voltage receiving end and a discharging voltage output end, wherein the first power supply voltage receiving end is used for being connected with the output end of the power supply; the front-stage switch module comprises a discharge voltage receiving end and a driving voltage output end, and the discharge voltage receiving end is connected with the discharge voltage output end of the charge-discharge module; the rear-stage switch module comprises a driving voltage receiving end, a second power supply voltage receiving end and a power supply voltage output end, wherein the driving voltage receiving end is connected with the driving voltage output end of the front-stage switch module, the second power supply voltage receiving end is used for being connected with the output end of the power supply, and the power supply voltage output end is used for being connected with the power supply input end of the laser galvanometer. According to the laser galvanometer protection circuit, when the laser galvanometer is powered on, on the basis of the charging and discharging characteristics of the charging and discharging module, the front-stage switch module and the rear-stage switch module are electrified slowly and are gradually opened, so that the current trunk impedance can be effectively controlled, the occurrence of peak current is restrained, the running stability of the laser galvanometer is improved, and the laser machining precision and the safety stability are further improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a laser galvanometer protection circuit in one embodiment;
FIG. 2 is a schematic block diagram showing a specific configuration of the charge/discharge module 20 according to one embodiment;
FIG. 3 is a schematic block diagram showing a specific configuration of the pre-stage switch module 40 in one embodiment;
FIG. 4 is a schematic block diagram showing the structure of the post-stage switch module 60 according to one embodiment;
FIG. 5 is a schematic diagram showing a specific structure of a laser galvanometer protection circuit according to an embodiment;
fig. 6 is a schematic diagram of a specific structure of a laser galvanometer protection circuit according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
FIG. 1 is a schematic block diagram of a laser galvanometer protection circuit in one embodiment.
In this embodiment, as shown in fig. 1, the laser galvanometer protection circuit includes a charge and discharge module 20, a front stage switch module 40, and a rear stage switch module 60.
The charge-discharge module 20 includes a first power supply voltage receiving terminal for connection with an output terminal of the power supply, and a discharge voltage output terminal.
The charge-discharge module 20 may be a component module that is connected to the output terminal of the power supply through the first power supply voltage receiving terminal, and connected to the discharge voltage receiving terminal of the front-stage switch module 40 through the discharge voltage output terminal, and is configured to charge according to the power supply voltage output by the power supply, and output the discharge voltage to the discharge voltage output terminal.
The discharge voltage may be an electrical signal that the charge-discharge module 20 generates according to a power supply voltage output from a power supply and outputs via a discharge voltage output terminal connected to the pre-stage switching module 40.
The pre-stage switching module 40 includes a discharge voltage receiving terminal connected with the discharge voltage output terminal of the charge-discharge module 20, and a driving voltage output terminal.
The front-stage switch module 40 may be a component module that is connected to the discharge voltage output terminal of the charge-discharge module 20 through the discharge voltage receiving terminal, is connected to the driving voltage receiving terminal of the rear-stage switch module 60 through the driving voltage output terminal, and is configured to receive the discharge voltage output by the charge-discharge module 20, and output the driving voltage to the driving voltage output terminal when the discharge voltage is greater than the first turn-on voltage.
The first turn-on voltage may be a minimum voltage that drives the pre-stage switching module 40 to switch to a turned-on state.
The rear-stage switch module 60 includes a driving voltage receiving end, a second power supply voltage receiving end and a power supply voltage output end, where the driving voltage receiving end is connected with the driving voltage output end of the front-stage switch module 40, the second power supply voltage receiving end is used to be connected with the output end of the power supply, and the power supply voltage output end is used to be connected with the power supply input end of the laser galvanometer.
The rear-stage switch module 60 may be a component module that is connected to the driving voltage output end of the front-stage switch module 40 through a driving voltage receiving end, is connected to the output end of the power supply through a second power voltage receiving end, is connected to the power input end of the laser galvanometer through a power voltage output end, is used for receiving the driving voltage output by the front-stage switch module 40 and the power voltage output by the power supply, and turns on the power output branch when the difference between the driving voltage and the power voltage is greater than the second turn-on voltage, so as to output the power voltage to the power voltage output end.
The second conduction voltage may be a minimum voltage that drives the post-stage switching module 60 to switch to the on state; the power output branch circuit may be connected to the output end of the power supply and the power input end of the laser galvanometer, and the post-stage switch module 60 determines the conducting condition according to the driving voltage and the power voltage to control the power voltage to be output to the circuit of the laser galvanometer.
The power output branch is connected with the output end of the power supply and the power input end of the laser galvanometer respectively, and comprises: the second power supply voltage receiving end of the rear-stage switch module 60 is connected with the output end of the power supply, and the power supply voltage output end is connected with the power supply input end of the laser galvanometer.
The power input end of the laser galvanometer comprises a positive power input end and a negative power input end of the laser galvanometer, wherein the positive power input end is used for receiving positive power voltage output by the rear-stage switch module 60, and the negative power input end is used for receiving negative power voltage output by the rear-stage switch module 60.
Specifically, when the laser galvanometer is powered on, the charge and discharge module 20 in the laser galvanometer protection circuit receives the power supply voltage output by the power supply through the output end through the first power supply voltage receiving end, charges according to the power supply voltage output by the power supply, and outputs the discharge voltage to the discharge voltage output end; the pre-stage switch module 40 receives the discharge voltage output by the charge-discharge module 20 through the discharge voltage output terminal through the discharge voltage receiving terminal, and outputs the driving voltage to the driving voltage output terminal when the discharge voltage is greater than the first on voltage; the rear stage switching module 60 receives the driving voltage output through the driving voltage output terminal of the front stage switching module 40 through the driving voltage receiving terminal, receives the power voltage output through the output terminal of the power supply through the second power voltage receiving terminal, and turns on the power output branch when the difference between the driving voltage and the power voltage is greater than the second turn-on voltage, so as to output the power voltage to the power voltage output terminal connected to the power input terminal of the laser galvanometer.
According to the laser galvanometer protection circuit provided by the embodiment, when the laser galvanometer is powered on, on the basis of the charging and discharging characteristics of the charging and discharging module, the front-stage switch module and the rear-stage switch module are slowly powered on and gradually turned on, so that the current trunk impedance can be effectively controlled, the occurrence of peak current is restrained, the running stability of the laser galvanometer is improved, and the laser machining precision and the safety stability are further improved.
Fig. 2 is a schematic block diagram showing a specific structure of the charge and discharge module 20 in one embodiment.
In the present embodiment, as shown in fig. 2, the charge and discharge module 20 includes a first voltage dividing unit 220 and a charge and discharge unit 240.
The first voltage dividing unit 220 is configured to output the divided power supply voltage through the connection between the first power supply voltage receiving end and the output end of the power supply.
The first voltage dividing unit 220 may be a component unit that is connected to the output end of the power supply through the first power supply voltage receiving end of the charge and discharge module 20, and is configured to receive the power supply voltage output by the power supply, and perform voltage dividing processing on the power supply voltage to output the divided power supply voltage.
Alternatively, the first voltage dividing unit 220 may be a voltage dividing resistor.
The charge-discharge unit 240 is connected to the first voltage dividing unit 220, and connected to a discharge voltage receiving end of the front-stage switch module 40 through a discharge voltage output end, and is configured to receive the divided power supply voltage, charge based on the divided power supply voltage, and output the discharge voltage to the discharge voltage output end.
The charge and discharge unit 240 may be a constituent unit connected to the first voltage division unit 220, connected to a discharge voltage receiving terminal of the front stage switch module 40 through a discharge voltage output terminal of the charge and discharge module 20, and configured to receive the divided power supply voltage output by the first voltage division unit 220, charge and generate a charge storage voltage based on the divided power supply voltage, and output the discharge voltage to the discharge voltage output terminal according to the charge storage voltage.
Alternatively, the charge and discharge unit 240 may be a capacitive-resistive charge and discharge circuit.
The charging may be a process in which the charging and discharging unit 240 receives the divided power voltage outputted from the first voltage dividing unit 220 and performs electric energy storage; the charge storage voltage may be a voltage formed when the charge and discharge unit 240 performs charge and energy storage; the discharge voltage may be a voltage discharged during the discharging of the charge and discharge unit 240 according to the charge storage voltage.
Specifically, when the laser galvanometer is powered on, the first voltage dividing unit 220 in the charge and discharge module 20 receives the power supply voltage output by the power supply through a first power supply voltage receiving end connected with the output end of the power supply, and performs voltage dividing processing on the power supply voltage to output the divided power supply voltage; the charge and discharge unit 240 connected to the first voltage division unit 220 receives the divided power supply voltage output by the first voltage division unit 220, charges and generates a charge storage voltage based on the divided power supply voltage, generates a discharge voltage according to the charge storage voltage, and outputs the discharge voltage to the discharge voltage receiving terminal of the front-stage switch module 40 through the discharge voltage output terminal.
In the laser galvanometer protection circuit provided in this embodiment, the first voltage division unit 220 and the charge and discharge unit 240 in the charge and discharge module 20 are used in cooperation, and when the laser galvanometer is powered on, slow power-on can be realized for the front-stage switch module and the rear-stage switch module based on the charge and discharge characteristics of the charge and discharge module.
Fig. 3 is a schematic block diagram illustrating a specific structure of the pre-stage switch module 40 in one embodiment.
In the present embodiment, as shown in fig. 3, the pre-stage switching module 40 includes a pre-stage switching unit 420.
The pre-stage switch unit 420 is connected to the discharge voltage output terminal of the charge-discharge module 20 through the discharge voltage receiving terminal, and connected to the driving voltage receiving terminal of the post-stage switch module 60 through the driving voltage output terminal, and is configured to receive the discharge voltage, and output the driving voltage to the driving voltage output terminal when the discharge voltage is greater than the first turn-on voltage.
The front stage switching unit 420 may be a constituent unit that is connected to the discharge voltage output terminal of the charge and discharge module 20 through the discharge voltage receiving terminal of the front stage switching module 40 and connected to the drive voltage receiving terminal of the rear stage switching module 60 through the drive voltage output terminal, and is configured to receive the discharge voltage output from the charge and discharge module 20 and output the drive voltage to the drive voltage output terminal when the discharge voltage is greater than the first turn-on voltage.
Alternatively, the pre-stage switching unit 420 may be a circuit including a switching tube.
The first turn-on voltage may be a minimum voltage driving the pre-stage switching unit 420 to be switched to a turned-on state.
Specifically, when the laser galvanometer is powered on, the front stage switching unit 420 in the front stage switching module 40 receives the discharge voltage output by the charge and discharge module 20 through a discharge voltage receiving terminal connected to the discharge voltage output terminal of the charge and discharge module 20, and outputs a driving voltage to the driving voltage receiving terminal of the rear stage switching module 60 through the driving voltage output terminal when the discharge voltage is greater than the first on voltage.
According to the laser galvanometer protection circuit provided by the embodiment, the on condition of the circuit in the pre-stage switch module 40 is determined by utilizing the pre-stage switch unit 420 in the pre-stage switch module 40, slow power-up is realized on the pre-stage switch module 40, the current trunk impedance is effectively controlled, the occurrence of peak current is restrained, the running stability of the laser galvanometer is improved, and the laser processing precision and the safety stability are further improved.
Fig. 4 is a schematic block diagram showing a specific structure of the post-stage switch module 60 in one embodiment.
In the present embodiment, as shown in fig. 4, the rear stage switching module 60 includes a second voltage dividing unit 620 and a rear stage switching unit 640.
The second voltage dividing unit 620 outputs the divided driving voltage through the driving voltage receiving terminal connected to the driving voltage output terminal of the pre-stage switching module 40.
The second voltage dividing unit 620 may be a component unit that is connected to the driving voltage output terminal of the preceding stage switching module 40 through the driving voltage receiving terminal of the following stage switching module 60, and is configured to receive the driving voltage output by the preceding stage switching module 40, and perform voltage dividing processing on the driving voltage to output the divided driving voltage.
Alternatively, the second voltage dividing unit 620 may be a voltage dividing resistor.
The rear stage switching unit 640 is configured to be connected to the second voltage division unit 620, connect to an output terminal of a power supply through the second power supply voltage receiving terminal, connect to a power supply input terminal of the laser galvanometer through the power supply voltage output terminal, receive the divided driving voltage and the power supply voltage, and output the power supply voltage to the laser galvanometer when a difference between the divided driving voltage and the power supply voltage is greater than a second conducting voltage.
The post-stage switching unit 640 may be a constituent unit connected to the second voltage dividing unit 620, connected to the output terminal of the power supply through the second power supply voltage receiving terminal of the post-stage switching module 60, and connected to the power supply input terminal of the laser galvanometer through the power supply voltage output terminal, for receiving the divided driving voltage outputted by the second voltage dividing unit 620 and the power supply voltage outputted by the power supply, and switching on the power supply output branch when the voltage difference between the divided driving voltage and the power supply voltage is greater than the second switching-on voltage.
Alternatively, the post-stage switching unit 640 may be a circuit including a switching tube.
The second conductive voltage may be a minimum voltage that drives the switching unit 640 at the subsequent stage to be switched to the conductive state.
Specifically, when the laser galvanometer is powered on, the second voltage dividing unit 620 in the rear-stage switch module 60 receives the driving voltage output by the front-stage switch module 40 through a driving voltage receiving end connected with the driving voltage output end of the front-stage switch module 40, and performs voltage dividing processing on the driving voltage to output a divided driving voltage; the rear stage switching unit 640 is connected to the second voltage division unit 620, receives the divided driving voltage outputted from the second voltage division unit 620, receives the power voltage outputted from the power supply through a second power voltage receiving terminal connected to the output terminal of the power supply, and turns on the power output branch when the voltage difference between the divided driving voltage and the power voltage is greater than the second turn-on voltage, so that the power voltage is outputted to the power input terminal of the laser oscillator through the power voltage output terminal.
According to the laser galvanometer protection circuit provided in the embodiment, the conduction condition of the circuit in the rear-stage switch module 60 is determined through the second voltage division unit 620 and the rear-stage switch unit 640 in the rear-stage switch module 60, and the rear-stage switch module 60 is electrified slowly so as to control the time of outputting the power supply voltage to the laser galvanometer, and effectively control the current trunk impedance, so that the occurrence of peak current is restrained, the operation stability of the laser galvanometer is improved, and the laser processing precision and the safety stability are further improved.
Fig. 5 and fig. 6 are schematic diagrams of specific structures of a laser galvanometer protection circuit in an embodiment.
In this embodiment, as shown in fig. 5 and 6, the laser galvanometer protection circuit includes a charge and discharge module 20, a front stage switch module 40, and a rear stage switch module 60.
The charge and discharge module 20 includes a first voltage division unit 220 and a charge and discharge unit 240.
The first voltage dividing unit 220 includes a first resistor R1, a first end of the first resistor R1 is connected to an output end of the power supply, and a second end of the first resistor R1 is connected to the charge and discharge unit 240.
The charge-discharge unit 240 includes a second resistor R2 and a first capacitor C1, wherein a first end of the second resistor R2 is connected to the first voltage dividing unit 220, a second end of the second resistor R2 is connected to a first end of the first capacitor and a discharge voltage receiving end of the front-stage switch module 40, and a second end of the first capacitor C1 is grounded.
Further, the pre-stage switching module 40 includes a pre-stage switching unit 420.
The pre-stage switching unit 420 includes a third resistor R3 and a first switching tube Q1, a first end of the first switching tube Q1 is connected to a discharge voltage output end of the charge-discharge module 20, a second end of the first switching tube Q1 is connected to a first end of the third resistor R3, a second end of the third resistor R3 is grounded, and a third end of the first switching tube Q1 is connected to a driving voltage receiving end of the post-stage switching module 60.
Alternatively, the first switch Q1 may be an N-channel MOS transistor, the first end, the second end and the third end of the first switch Q1 may be a gate, a source and a drain of the N-channel MOS transistor, respectively, and the first turn-on voltage of the pre-stage switch unit 420 may be a gate-source withstand voltage of the N-channel MOS transistor.
The first switching transistor Q1 may be a P-channel MOS transistor, and the first, second and third ends of the first switching transistor Q1 may be the source, gate and drain of the P-channel MOS transistor, respectively, and the first turn-on voltage of the drain pre-stage switching unit 420 may be the gate-source withstand voltage of the P-channel MOS transistor.
Meanwhile, the rear stage switching module 60 includes a second voltage division unit 620 and a rear stage switching unit 640.
The second voltage dividing unit 620 includes a fourth resistor R4, a first end of the fourth resistor R4 is connected to the driving voltage output end of the pre-stage switching module 40, and a second end of the fourth resistor R4 is connected to the output end of the power supply.
The rear-stage switching unit comprises a second switching tube Q2, wherein a first pin, a second pin and a third pin of the second switching tube Q2 are all connected with the output end of the power supply, a fourth pin of the second switching tube Q2 is connected with a second voltage division unit 620, and a fifth pin, a sixth pin, a seventh pin and an eighth pin of the second switching tube Q2 are all connected with the power input end of the laser galvanometer.
Optionally, the second switching transistor Q2 may be a P-channel MOS transistor, the first pin, the second pin and the third pin of the second switching transistor Q2 may be pins connected to the source of the P-channel MOS transistor, the fourth pin of the second switching transistor Q2 may be a pin connected to the gate of the P-channel MOS transistor, and the fifth pin, the sixth pin, the seventh pin and the eighth pin of the second switching transistor Q2 may be pins connected to the drain of the P-channel MOS transistor; the second turn-on voltage of the post-stage switching unit 640 may be a gate-source withstand voltage value of the P-channel MOS transistor.
Optionally, the second switching transistor Q2 may be an N-channel MOS transistor, the first pin, the second pin, and the third pin of the fourth switching transistor Q4 may be pins connected to the source of the N-channel MOS transistor, the fourth pin of the second switching transistor Q2 may be pins connected to the gate of the N-channel MOS transistor, and the fifth pin, the sixth pin, the seventh pin, and the eighth pin of the second switching transistor Q2 may be pins connected to the drain of the N-channel MOS transistor; the second turn-on voltage of the rear stage switching unit 640 may be a gate-source withstand voltage value of the N-channel MOS transistor.
As shown in fig. 5, when the power supply voltage received by the laser galvanometer protection circuit is positive, that is, the charge-discharge module 20 and the post-stage switch module 60 both receive the positive power supply voltage output by the power supply, the first switch transistor Q1 is an N-channel MOS transistor, and the second switch transistor Q2 is a P-channel MOS transistor.
Specifically, when the laser galvanometer is electrified, the positive power supply voltage output by the power supply is divided by the first resistor R1, and the divided positive power supply voltage is output; the second resistor and the first capacitor C1 receive the divided positive power supply voltage, charge and store energy based on the divided positive power supply voltage to output a discharge voltage, and when the discharge voltage is greater than a gate-source withstand voltage value of the first switching tube Q1, the first switching tube Q1 is switched to a conducting state to output a driving voltage; the fourth resistor R4 receives the driving voltage and performs voltage division processing to output the divided driving voltage, the second switching tube Q2 receives the divided driving voltage and the positive power supply voltage output by the power supply, and when the voltage difference between the divided driving voltage and the positive power supply voltage is larger than the voltage withstand value of the grid electrode-source electrode of the second switching tube Q2, the second switching tube Q2 is switched to a conducting state to conduct the power supply output branch circuit so that the positive power supply voltage is output to the positive power supply input end of the laser galvanometer.
Similarly, as shown in fig. 6, when the power supply voltage received by the laser galvanometer protection circuit is negative, that is, the charge-discharge module 20 and the post-stage switch module 60 both receive the negative power supply voltage output by the power supply, the first switch transistor Q1 is a P-channel MOS transistor, and the second switch transistor Q2 is an N-channel MOS transistor.
The first switching tube Q1 and the second switching tube Q2 are required to have low dc resistance and high gate-source withstand voltage, and the first switching tube Q1 is required to pass a small operating current, and the second switching tube Q2 is required to pass a large operating current.
Specifically, when the laser galvanometer is electrified, the negative power supply voltage output by the power supply is divided by the first resistor R1, and the divided negative power supply voltage is output; the second resistor and the first capacitor C1 receive the divided negative power supply voltage, charge and store energy based on the divided negative power supply voltage to output a discharge voltage, and when the discharge voltage is greater than a gate-source withstand voltage value of the first switching tube Q1, the first switching tube Q1 is switched to a conducting state to output a driving voltage; the fourth resistor R4 receives the driving voltage and performs voltage division processing to output the divided driving voltage, the second switching tube Q2 receives the divided driving voltage and the negative power supply voltage output by the power supply, and when the voltage difference between the divided driving voltage and the negative power supply voltage is larger than the voltage withstand value of the grid electrode and the source electrode of the second switching tube Q2, the second switching tube Q2 is switched to a conducting state to conduct the power supply output branch circuit so that the negative power supply voltage is output to the negative power supply input end of the laser galvanometer.
According to the laser vibrating mirror protection circuit provided by the embodiment, when the laser vibrating mirror is powered on, on the basis of the charging and discharging characteristics of the charging and discharging module, the pre-stage switch module and the post-stage switch module are electrified slowly, so that the current trunk impedance is effectively controlled, the peak current is restrained, the operation stability of the laser vibrating mirror is improved, the laser processing precision and the safety stability are further improved, meanwhile, the excessive requirements on a power supply source are reduced, the possibility of damage to the back-end circuits such as the laser vibrating mirror is reduced, the safety level and the reliability of products are improved, and the safety protection to equipment and users is also enhanced.
The application also provides a laser galvanometer protection device, which comprises the laser galvanometer protection circuit in the embodiment.
The application also provides a laser galvanometer, which comprises the laser galvanometer protection circuit in the embodiment.
The application also provides processing equipment which comprises the laser galvanometer protection circuit in the embodiment. The aforementioned processing device may be a laser processing device.
The above-mentioned division of each module in the laser galvanometer protection circuit is only for illustration, and in other embodiments, the laser galvanometer protection circuit may be divided into different modules as needed to complete all or part of the functions of the laser galvanometer protection circuit.
According to the laser galvanometer protection circuit, the laser galvanometer protection device and the processing equipment provided by the embodiment, when the laser galvanometer is powered on, the front-stage switch module and the rear-stage switch module are electrified slowly based on the charging and discharging characteristics of the charging and discharging module, so that the current trunk impedance is effectively controlled, the peak current is restrained, the operation stability of the laser galvanometer is improved, the laser processing precision and the safety stability are further improved, and the laser galvanometer protection circuit has important economic value and popularization and practice value.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (11)
1. A laser galvanometer protection circuit, comprising:
the charging and discharging module comprises a first power supply voltage receiving end and a discharging voltage output end, wherein the first power supply voltage receiving end is used for being connected with the output end of the power supply;
the front-stage switch module comprises a discharge voltage receiving end and a driving voltage output end, and the discharge voltage receiving end is connected with the discharge voltage output end of the charge-discharge module;
the rear-stage switch module comprises a driving voltage receiving end, a second power supply voltage receiving end and a power supply voltage output end, wherein the driving voltage receiving end is connected with the driving voltage output end of the front-stage switch module, the second power supply voltage receiving end is used for being connected with the output end of the power supply, and the power supply voltage output end is used for being connected with the power supply input end of the laser galvanometer.
2. The laser galvanometer protection circuit of claim 1, wherein the charge and discharge module comprises:
the first voltage dividing unit is used for outputting divided power supply voltage through the connection of the first power supply voltage receiving end and the output end of the power supply;
and the charge-discharge unit is connected with the first voltage division unit and is connected with the discharge voltage receiving end of the front-stage switch module through the discharge voltage output end.
3. The laser galvanometer protection circuit of claim 2, wherein the first voltage divider unit comprises a first resistor, a first end of the first resistor is connected to the output of the power supply, and a second end of the first resistor is connected to the charge and discharge unit.
4. The laser galvanometer protection circuit of claim 2, wherein the charge and discharge unit comprises a second resistor and a first capacitor, a first end of the second resistor is connected to the first voltage dividing unit, a second end of the second resistor is connected to the first end of the first capacitor and a discharge voltage receiving end of the pre-stage switch module, and a second end of the first capacitor is grounded.
5. The laser galvanometer protection circuit of any one of claims 1 to 4, wherein the pre-switch module comprises:
the front-stage switch unit is connected with the discharge voltage output end of the charge-discharge module through the discharge voltage receiving end, is connected with the drive voltage receiving end of the rear-stage switch module through the drive voltage output end, and is used for receiving the discharge voltage, and outputting the drive voltage to the drive voltage output end when the discharge voltage is larger than the first conduction voltage.
6. The laser galvanometer protection circuit of claim 5, wherein the pre-stage switching unit comprises a third resistor and a first switching tube, a first end of the first switching tube is connected with a discharge voltage output end of the charge-discharge module, a second end of the first switching tube is connected with a first end of the third resistor, a second end of the third resistor is grounded, and a third end of the first switching tube is connected with a driving voltage receiving end of the post-stage switching module.
7. The laser galvanometer protection circuit of any one of claims 1 to 4, wherein the post-stage switching module comprises:
the second voltage division unit is connected with the driving voltage output end of the front-stage switch module through a driving voltage receiving end and outputs divided driving voltage;
the rear-stage switch unit is used for being connected with the second voltage division unit, being connected with the output end of the power supply through the second power supply voltage receiving end, being connected with the power supply input end of the laser galvanometer through the power supply voltage output end, receiving the divided driving voltage and the power supply voltage, and outputting the power supply voltage to the laser galvanometer when the difference value between the divided driving voltage and the power supply voltage is larger than a second conducting voltage.
8. The laser galvanometer protection circuit of claim 7, wherein the second voltage divider unit comprises a fourth resistor, a first end of the fourth resistor is connected to the driving voltage output of the pre-stage switch module, and a second end of the fourth resistor is connected to the output of the power supply.
9. The laser oscillator protection circuit according to claim 7, wherein the post-stage switching unit comprises a second switching tube, the first pin, the second pin and the third pin of the second switching tube are all connected with the output end of the power supply, the fourth pin of the second switching tube is connected with the second voltage division unit, and the fifth pin, the sixth pin, the seventh pin and the eighth pin of the second switching tube are all connected with the power input end of the laser oscillator.
10. A laser galvanometer protection device, comprising:
the laser galvanometer protection set forth in any one of claims 1 through 9.
11. A processing apparatus, comprising:
the laser galvanometer protection set forth in any one of claims 1 through 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321565056.2U CN220209963U (en) | 2023-06-19 | 2023-06-19 | Laser galvanometer protection circuit, laser galvanometer protection device and processing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321565056.2U CN220209963U (en) | 2023-06-19 | 2023-06-19 | Laser galvanometer protection circuit, laser galvanometer protection device and processing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220209963U true CN220209963U (en) | 2023-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321565056.2U Active CN220209963U (en) | 2023-06-19 | 2023-06-19 | Laser galvanometer protection circuit, laser galvanometer protection device and processing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220209963U (en) |
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2023
- 2023-06-19 CN CN202321565056.2U patent/CN220209963U/en active Active
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