A control method and system for controllable pulse power supply triggered internally and externally

Abstract

To meet different application requirements, the present invention provides a control method and system for an internally and externally triggered controllable pulse power supply. The present invention mainly comprises a power supply module, a host computer, a trigger module, a control module, a drive module, and a constant current output module; the power supply module provides constant voltage power supply to the control module, the drive module, and the constant current output module to ensure the working stability of each module, the host computer displays the working status of the entire system, the trigger module controls the pulse output mode of the system, the internal trigger realizes continuous output of high-frequency pulses, and the external trigger realizes point control; the control module monitors the working status of the power supply module, the drive module, and the constant current module, and cuts off the output in time when an abnormality occurs to ensure the reliability and safety of the system, the drive module separates the control module from the constant current output module, realizes strong and weak electrical isolation and improves the anti-interference ability of the system, the constant current output module is controlled by the drive module to output a current of corresponding pulse width, can adaptively adjust the output voltage, realize effective utilization of the input power, and can realize controllable output pulse width, controllable output frequency, controllable output current, and controllable trigger mode, and has high flexibility.

Description

Technical Field

[0001] The present invention relates to the field of pulse power supply control and power supply system design, and in particular to an internally and externally triggered controllable pulse power supply control method and system. Background Art

[0002] As a special power supply device, the main design goal of pulse power supply is to provide high energy and specific current output in a short time, which makes it of great value in many applications requiring precise energy release and short-term high power output. Pulse power supply is not limited to outputting simple voltage or current waveforms, but more importantly, it can accurately adjust the output waveform shape, amplitude, duration and repetition frequency according to application requirements to achieve different power requirements and operation modes.

[0003] In the industrial field, pulse power supplies are often used in laser processing, arc welding, material surface treatment and other processes, which require precise current pulses to achieve specific effects. For example, the pulse power supply in the laser system can provide high peak current to drive the laser to generate high-intensity light pulses, which has a wide range of applications in material cutting, marking and other aspects.

[0004] In the medical field, pulse power supplies are widely used in medical imaging equipment, laser therapy equipment, and certain types of physical therapy equipment. Especially in pulse laser therapy, pulse power supplies need to provide very short, high-energy pulses to ensure that energy can be precisely controlled to be delivered to the target area, such as tissue removal or lesion repair.

[0005] In the field of scientific research, pulse power supplies are used in high-energy physics experiments such as particle accelerators, nuclear fusion experiments, and electron beam equipment. By providing precise and high-power pulses, they can meet the strict requirements of the experiment in terms of time domain, power density, etc.

[0006] The application scope of pulse power supply is constantly expanding with the development of technology, and it plays a vital role in many high-precision and high-power density applications. Pulse power supply is developing towards more efficient, more precise and more reliable directions.

[0007] The variable pulse width and triggering mode of the pulse power supply make the control system of the pulse power supply more complicated. In order to accurately adjust the pulse width and triggering mode, the control system requires higher precision and complex algorithms, which may include multi-layer feedback loops and high-frequency digital signal processing. This increases the design difficulty and development cycle of the system, and may cause control errors and instability. Moreover, due to the variability of pulse width and triggering mode, the working conditions of the pulse power supply are more variable than those of the power supply with fixed pulse width. If the control system or circuit design is improper, it may cause unstable output, or overload, overheating and other faults in certain working modes. Summary of the invention

[0008] To meet different application requirements, the present invention provides a control method and system for an internally and externally triggered controllable pulse power supply. The present invention mainly comprises a power supply module, a host computer, a trigger module, a control module, a drive module, and a constant current output module; the power supply module provides constant voltage power supply to the control module, the drive module, and the constant current output module to ensure the working stability of each module, the host computer displays the working status of the entire system, the trigger module controls the pulse output mode of the system, the internal trigger realizes continuous output of high-frequency pulses, and the external trigger realizes point control; the control module monitors the working status of the power supply module, the drive module, and the constant current module, and cuts off the output in time when an abnormality occurs to ensure the reliability and safety of the system, the drive module separates the control module from the constant current output module, realizes strong and weak electrical isolation and improves the anti-interference ability of the system, the constant current output module is controlled by the drive module to output a current of corresponding pulse width, can adaptively adjust the output voltage, realize effective utilization of the input power, and can realize controllable output pulse width, controllable output frequency, controllable output current, and controllable trigger mode, and has high flexibility.

[0009] The present invention provides a control method for an internally and externally triggered controllable pulse power supply, and the specific working steps are as follows:

[0010] S1: Parameter setting stage.

[0011] S2: Power allocation stage.

[0012] S3: Pulse output stage.

[0013] To realize the control method proposed in the present invention, the present invention provides a controllable pulse power supply control system with internal and external triggering. The system consists of a power supply module, a host computer, a trigger module, a control module, a drive module, and a constant current output module. The power supply module is divided into a main control power supply and a drive power supply module. The main control power supply is realized by a step-down circuit, and the drive power supply realizes constant voltage power supply through a capacitor group; the host computer provides a parameter setting interface and a state feedback interface, and the parameter setting includes necessary parameters such as pulse intensity, output frequency, pulse width, trigger mode, etc., and the state feedback includes working state feedback, alarm feedback, waveform feedback, etc.; the trigger module is realized by a photoelectric conversion circuit, which converts an external trigger signal into an internal identifiable signal; the control module is controlled by an embedded chip, and the control module includes an MCU, a power supply end sampling circuit, a constant current output end sampling circuit, a drive control circuit, an internal and external trigger control circuit, a system working state monitoring circuit, and a host computer communication circuit; the drive module is composed of an embedded chip and a programmable logic device. The drive module is controlled by the control module and is responsible for allocating the current of the constant current output module. The programmable logic device controls the output time of the constant current output module; the constant current output module is directly connected to the above-mentioned power supply module, and outputs current according to the trigger instruction issued by the embedded chip in the above-mentioned drive module.

[0014] In step S1, specifically:

[0015] S101: Query the current system working status in the above-mentioned host computer.

[0016] S102: Under normal working conditions, set the pulse width, output frequency, trigger mode, pulse intensity and other parameters in the above parameter setting interface.

[0017] S103: After the instruction is issued, the setting is successful when the above status display interface is consistent with the parameter setting interface.

[0018] In step S2, specifically:

[0019] S201: After receiving the parameter setting instruction, the control module obtains the voltage and current provided by the current power supply module through sampling and calculates the input power.

[0020] S202: Calculate the voltage required by the constant current output module according to the set pulse intensity, and send it to the above-mentioned driving module. The driving module adaptively adjusts the output voltage of the above-mentioned constant current module. The driving module adopts a distributed current distribution method to evenly distribute the current to K outputs.

[0021] S203: Calculate the single pulse output period according to the set pulse width, and send it to the above-mentioned driving module. The driving module sets the output time of the constant current module through the programmable logic device.

[0022] S204: According to the set trigger mode, when the trigger mode is set to external trigger, the control module transfers the start and stop authority of the drive module to the trigger module. When the trigger module receives an external valid signal, it starts to output pulses. When the external valid signal stops, the pulse output stops. When the trigger mode is set to internal trigger, the control module controls the start and stop authority of the drive module. When the main control module receives the output command of the host computer, it outputs pulses according to the set output frequency.

[0023] In step S3, specifically:

[0024] S301: The driving module monitors the output status of each channel of the constant current output module in real time, monitors the temperature and humidity of the output hardware, and feeds back the monitoring information to the control module in real time.

[0025] S302: The control module samples the voltage and current of the power supply module in real time to monitor the output status of the power supply module.

[0026] S303: The control module samples the output voltage and current of the constant current output module in real time, and feeds back the sampled waveform to the status display interface in the host computer in real time.

[0027] S304: The control module receives the driving information in real time, monitors the downstream working status, and feeds back to the host computer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a flow chart of the control method of the present invention.

[0029] Figure 2 This is a system framework diagram of the present invention.

[0030] Figure 3 This is a control module framework diagram of the present invention. DETAILED DESCRIPTION

[0031] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0032] The invention provides a control method and system for an internally and externally triggered controllable pulse power supply.

[0033] Further, see Attachment Figure 1 The specific working steps of the control method of the present invention are as follows:

[0034] S1: Parameter setting stage.

[0035] S2: Power allocation stage.

[0036] S3: Pulse output stage.

[0037] In order to realize the control method proposed by the present invention, the present invention provides a controllable pulse power supply control system with internal and external triggering, as shown in the attached Figure 2 As shown, the system consists of a power supply module, a host computer, a trigger module, a control module, a drive module, and a constant current output module.

[0038] The power supply module is divided into a main control power supply and a drive power supply module. The main control power supply is realized by a step-down circuit, and the drive power supply realizes constant voltage power supply through a capacitor group.

[0039] As an optional implementation, the host computer is developed through winform, the parameter setting interface and the status feedback interface use GroupBox controls, the necessary parameters such as pulse intensity, output frequency, pulse width, trigger mode, etc. use Button controls, and the status feedback includes working status feedback, alarm feedback, waveform feedback, etc. using label and chart controls.

[0040] As an optional implementation, when the trigger module is implemented by a photoelectric conversion circuit, an external optical trigger signal can be converted into an internally identifiable level signal.

[0041] As an optional implementation, the control module is controlled by an embedded chip. Figure 3 The control module includes MCU, power supply end sampling circuit, constant current output end sampling circuit, drive control circuit, internal and external trigger control circuit, system working status monitoring circuit, and host computer communication circuit; MCU is responsible for sending and receiving instructions of the control module and processing feedback information of other modules; according to the power supply end sampling circuit, the input end voltage and current sampling values ​​are obtained, according to the constant current output end sampling circuit, the current system output state is obtained, according to the drive control circuit, the constant current output module is controlled to start and stop, according to the system working status monitoring circuit, the current system working environment state, such as temperature, humidity, etc., is obtained; according to the host computer communication circuit, the human-computer interaction instructions are obtained, and the working state is fed back to the host computer.

[0042] As an optional implementation, the driving module is composed of an embedded chip and a programmable logic device. The driving module is controlled by the control module and is responsible for allocating current to the constant current output module. The programmable logic device controls the output time of the constant current output module.

[0043] As an optional implementation, the constant current output module is directly connected to the power supply module, and outputs current according to a trigger instruction issued by the embedded chip in the driving module.

[0044] Furthermore, in step S1, specifically:

[0045] S101: Query the current system working status in the above-mentioned host computer.

[0046] S102: Under normal working conditions, set the pulse width, output frequency, trigger mode, pulse intensity and other parameters in the above parameter setting interface.

[0047] S103: After the instruction is issued, the setting is successful when the above status display interface is consistent with the parameter setting interface.

[0048] Furthermore, in step S2, specifically:

[0049] S201: After receiving the parameter setting instruction, the control module obtains the voltage and current provided by the current power supply module through sampling and calculates the input power.

[0050] S202: According to the set pulse intensity, the voltage required by the constant current output module is calculated and sent to the above-mentioned driving module. The driving module adaptively adjusts the output voltage of the above-mentioned constant current module. The driving module adopts a distributed current distribution method to evenly distribute the current to K outputs to ensure that power loss is reduced and the heat dissipation capacity of the system is increased.

[0051] S203: Calculate the single pulse output period according to the set pulse width, and send it to the above-mentioned driving module. The driving module sets the output time of the constant current module through the programmable logic device.

[0052] S204: According to the set trigger mode, when the trigger mode is set to external trigger, the control module transfers the start and stop authority of the drive module to the trigger module. When the trigger module receives an external valid signal, it starts to output pulses. When the external valid signal stops, the pulse output stops. When the trigger mode is set to internal trigger, the control module controls the start and stop authority of the drive module. When the main control module receives the output command of the host computer, it outputs pulses according to the set output frequency.

[0053] Furthermore, in step S3, specifically:

[0054] S301: The driving module monitors the output status of each channel of the constant current output module in real time, monitors the temperature and humidity of the output hardware, and feeds back the monitoring information to the control module in real time.

[0055] S302: The control module samples the voltage and current of the power supply module in real time to monitor the output status of the power supply module.

[0056] S303: The control module samples the output voltage and current of the constant current output module in real time, and feeds back the sampled waveform to the status display interface in the host computer in real time.

[0057] S304: The control module receives the driving information in real time, monitors the downstream working status, and feeds back to the host computer.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that various modifications may be made to the present invention, or some of the technical features may be replaced by equivalents. However, these modifications and replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the present invention.

Claims

1. A control method and system for an internally and externally triggered controllable pulse power supply, characterized in that: The specific working steps of the control method of the controllable pulse power supply triggered internally and externally are as follows: S1: parameter setting stage; S2: power allocation stage; S3: Pulse output stage.

2. The control method and system of an internally and externally triggered controllable pulse power supply according to claim 1, characterized in that: The system consists of a power supply module, a host computer, a trigger module, a control module, a drive module, and a constant current output module; the power supply module is divided into a main control power supply and a drive power supply module, the main control power supply is realized by a step-down circuit, and the drive power supply realizes constant voltage power supply through a capacitor group; the host computer provides a parameter setting interface and a state feedback interface, the parameter setting includes pulse intensity, output frequency, pulse width, and trigger mode, and the state feedback includes working state feedback, alarm feedback, and waveform feedback; the trigger module is realized by a photoelectric conversion circuit, and converts an external trigger signal into an internally recognizable electrical signal; the control module is controlled by an embedded chip, and the control module includes an MCU, a power supply end sampling circuit, a constant current output end sampling circuit, a drive control circuit, an internal and external trigger control circuit, a system working state monitoring circuit, and a host computer communication circuit; the drive module is composed of an embedded chip and a programmable logic device, the drive module is controlled by the control module, and is responsible for allocating the current of the constant current output module, and the programmable logic device controls the output time of the constant current output module; the constant current output module is directly connected to the above-mentioned power supply module, and outputs current according to the trigger instruction issued by the embedded chip in the above-mentioned drive module.

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