Titanium metal smelting power supply device and control method

Abstract

The invention relates to the technical field of power supply management, and discloses a titanium metal smelting power supply device, which comprises an information acquisition module used for acquiring load feedback information, and the load feedback information comprises current and voltage; the judgment module is used for judging whether the current and the voltage are out of limit or not according to the load feedback information, if the current and the voltage are not out of limit, the output loop takes effect, the current and the voltage are output, if the current is out of limit, the current loop takes effect, the current loop is used for limiting the output current, and if the voltage is out of limit, the voltage loop takes effect, and the voltage loop is used for limiting the output voltage; the impedance matching module performs impedance matching calculation on the output current and voltage through a selector, corrects the output current and voltage, and ensures stable output of the current and voltage; and the output module is used for outputting the corrected output current and voltage to a load through the output ring.

Description

Technical Field

[0001] The present invention relates to the technical field of power management, and in particular to a titanium metal smelting power supply device and a control method. Background Art

[0002] Titanium metal smelting process: It is mainly divided into three stages, arc starting stage, melting stage, and capping stage. There will be sudden load changes in all three stages, and they are very frequent, with several small mutations basically every minute. The process adopts the form of short-circuit arc starting, that is, the processed metal rod and the base are directly short-circuited. After the current is running, the processed metal rod is slowly pulled up by the inverter servo motor. In this process, an arc will appear. If the metal rod is abnormally adjusted, the load fluctuation will be very violent. In this process, the transient response speed of the system is crucial. Transient response refers to the process of the system output changing from the initial state to the stable state under the action of a typical signal input.

[0003] At present, the power supply device for titanium metal smelting usually adopts high-frequency switching power supply. In order to improve the power of the system and ensure the power margin and maintainability, the industry generally adopts the method of using multiple high-frequency switching power supplies in parallel. However, the existing technology generally uses a host to cooperate with multiple slaves. Although this method can achieve a certain degree of coordination, it also brings many problems. The host not only needs to control the start and stop of the slave, but also needs to provide given signals and synchronization signals, etc. This requires multiple groups of signal lines to be connected, resulting in a large number of signal lines, increasing the complexity of the system and the risk of failure. If communication is used for coordination, there is a certain delay in the signal transmission of the communication, which will directly affect the transient response speed and reduce the reliability of the entire power supply system. Summary of the invention

[0004] The technical problem to be solved by the present invention is to solve the problem of low transient response speed of the existing titanium metal smelting power supply device.

[0005] In order to solve the above technical problems, the present invention provides a titanium metal smelting power supply device, the titanium metal smelting power supply device comprising:

[0006] An information acquisition module, wherein the information acquisition module is used to acquire load feedback information, wherein the load feedback information includes current and voltage;

[0007] A judgment module, the judgment module is used to judge whether the current and voltage exceed the limit according to the load feedback information. If both the current and voltage are within the limit, the output loop takes effect and outputs the current and voltage. If the current exceeds the limit, the current loop takes effect and the current loop is used to limit the output current. If the voltage exceeds the limit, the voltage loop takes effect and the voltage loop is used to limit the output voltage.

[0008] An impedance matching module, wherein the impedance matching module performs impedance matching calculation on the output current and voltage through a selector, corrects the output current and voltage, and ensures stable output of the current and voltage;

[0009] The output module is used to output the corrected output current and voltage to the load through the output loop.

[0010] Furthermore, the power supply device is configured as a plurality of power supply units, and a bus is provided to connect the plurality of power supply units in parallel to supply power to the load.

[0011] Furthermore, the plurality of power supply units connected in parallel are provided with a backup function. When one of the power supply units is damaged, the other power supply units can automatically back up to ensure the normal operation of the power supply device.

[0012] Furthermore, the titanium metal smelting power supply device comprises:

[0013] A main control module, the main control module is used to coordinate the output of multiple parallel power supply units.

[0014] Furthermore, the main control module is provided with sensors for monitoring the output voltage and output current of each of the power supply units, and determines the output allocation of each of the power supply units according to the current output state.

[0015] Furthermore, the main control module is provided with an outer constant voltage ring, which is used to maintain voltage stability and coordinate the given values ​​of the output voltages of each of the power supply devices so that the voltage outputs of each of the power supply units are the same.

[0016] Furthermore, the power supply device comprises:

[0017] An uncontrolled rectifier module, wherein the uncontrolled rectifier module rectifies the alternating current into direct current through uncontrolled rectification;

[0018] A high-frequency positive and negative pulse sequence module, which inverts the direct current through a modulation technology to output a high-frequency positive and negative pulse sequence;

[0019] A high-frequency transformer module, wherein the high-frequency transformer module determines the maximum voltage output by the power supply device through the primary-secondary winding ratio;

[0020] A unidirectional power module is used to rectify the high-frequency positive and negative pulse sequence to generate a DC power output.

[0021] According to another aspect of the present invention, a control method for a titanium metal smelting power supply device is provided, wherein the control method for a titanium metal smelting power supply device comprises:

[0022] S100, collecting load feedback information, where the load feedback information includes current and voltage;

[0023] S200, judging whether the current and voltage exceed the limit according to the load feedback information, if both the current and voltage do not exceed the limit, the output loop takes effect, and the output current and voltage are output; if the current exceeds the limit, the current loop takes effect, and the current loop is used to limit the output current; if the voltage exceeds the limit, the voltage loop takes effect, and the voltage loop is used to limit the output voltage;

[0024] S300, performing impedance matching calculation on the output current and voltage through a selector, correcting the output current and voltage, and ensuring that the current and voltage are output stably;

[0025] S400, outputting the corrected output current and voltage to a load through the output loop.

[0026] Furthermore, the control method of the titanium metal smelting power supply device includes:

[0027] S500, configuring the power supply device to include multiple power supply units, and connecting the multiple power supply units in parallel by configuring a bus to supply power to the load.

[0028] Furthermore, the control method of the titanium metal smelting power supply device includes:

[0029] The outputs of the plurality of parallel-connected power supply units are coordinated by setting a main control module.

[0030] Compared with the prior art, the titanium metal smelting power supply device according to the embodiment of the present invention has the following beneficial effects:

[0031] The power supply device in the embodiment of the present invention collects feedback information of the load, and determines whether the load current or voltage exceeds the limit, whether it is in constant current or constant voltage operation. When the current exceeds the limit, the current is limited by the current loop, and when the voltage exceeds the limit, the voltage is limited by the voltage loop, so as to ensure that both the current and voltage are operating within the safe range. The current loop and the voltage loop are tracked with each other, and when the load changes drastically, it is ensured that any output does not exceed the limit value. The embodiment of the present invention can effectively suppress the influence of the load mutation on the output voltage by adopting the control strategy of the current loop plus the voltage loop, and shorten the stabilization time of the output voltage. When the load suddenly changes, the power supply device is adjusted by using the current loop and the voltage loop, which can not only effectively reduce the fluctuation of the output voltage, but also shorten the time for the output voltage to stabilize, and improve the reliability of the power supply device. The embodiment of the present invention adopts the strategy of combining the current loop and the voltage loop. When the voltage or current of the load suddenly changes, the current loop and the voltage loop can respond quickly, stabilize the output voltage and output current of the power supply device within a reasonable range, and effectively improve the transient response speed of the power supply device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the flow of various modules of a titanium metal smelting power supply device provided in an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of multiple power supply units connected in parallel in a titanium metal smelting power supply device provided by an embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of controlling multiple power supply units through a main control module in a titanium metal smelting power supply device provided by an embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of processing alternating current by various modules in a titanium metal smelting power supply device provided by another embodiment of the present invention;

[0036] Figure 5 It is a flow chart of a control method of a titanium metal smelting power supply device provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0037] The following is a description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope of the present invention. Similarly, for clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0038] like Figure 1 As shown, in an optional embodiment of the present invention, a titanium metal smelting power supply device comprises:

[0039] An information acquisition module, wherein the information acquisition module is used to acquire load feedback information, wherein the load feedback information includes current and voltage;

[0040] A judgment module, the judgment module is used to judge whether the current and voltage exceed the limit according to the load feedback information. If both the current and voltage are within the limit, the output loop takes effect and outputs the current and voltage. If the current exceeds the limit, the current loop takes effect and the current loop is used to limit the output current. If the voltage exceeds the limit, the voltage loop takes effect and the voltage loop is used to limit the output voltage.

[0041] An impedance matching module, wherein the impedance matching module performs impedance matching calculation on the output current and voltage through a selector, corrects the output current and voltage, and ensures stable output of the current and voltage;

[0042] The output module is used to output the corrected output current and voltage to the load through the output loop.

[0043] Among them, the information acquisition module is responsible for real-time monitoring of the current and voltage feedback information of the load, which can be achieved by installing current sensors and voltage sensors, or by using a microcontroller (such as Arduino, Raspberry Pi, etc.) or a dedicated data acquisition card to collect current and voltage data in real time; Among them, the judgment module judges whether the current and voltage exceed the safety range based on the collected load feedback information. If they exceed the limit, the corresponding control loop (current loop or voltage loop) will be activated to limit it to ensure the safe operation of the equipment; Among them, the impedance matching module matches the output current and voltage through a selector to maintain the stability of the output of the power supply device.

[0044] Specifically, transient response refers to the dynamic behavior of the system after being subjected to a sudden input signal or load change, that is, the transition process of the system from the initial state to the stable state. A faster transient response speed enables the power supply system to quickly adjust its output to maintain stability when the load undergoes a sudden change (such as an increase or decrease in load). A faster transient response speed can reduce voltage fluctuations and ensure that the power supply can meet the needs of the load in a timely manner. Good impedance matching can reduce the reflection of the signal during transmission, thereby improving the overall response speed of the power supply device. Reflection will cause unnecessary signal fluctuations and affect transient response. Impedance matching can be achieved through circuit loop calculation and real-time adjustment of the switching frequency and switching duty cycle of the load. The power supply device only needs to achieve the purpose of impedance matching based on its own feedback voltage and current.

[0045] The embodiment of the present invention can effectively suppress the influence of sudden load changes on the output voltage by adopting a control strategy of current loop plus voltage loop, shorten the stabilization time of the output voltage, and use the current loop and voltage loop to adjust the power supply device when the load suddenly changes, which can not only effectively reduce the fluctuation of the output voltage, but also shorten the time for the output voltage to stabilize, thereby improving the reliability of the power supply device. The embodiment of the present invention adopts a strategy of combining the current loop and the voltage loop. When the voltage or current of the load suddenly changes, the current loop and the voltage loop can respond quickly, stabilize the output voltage and output current of the power supply device within a reasonable range, and effectively improve the transient response speed of the power supply device. The embodiment of the present invention also sets an impedance matching module, and by matching the impedance of the load and the power supply device, it can maximize the power transmission efficiency, ensure that when the load changes, the current and voltage can be quickly adjusted to a new stable state, thereby improving the transient response capability.

[0046] like Figure 2As shown, in an optional embodiment of the present invention, the power supply device is configured as a plurality of power supply units, and a bus is provided to connect the plurality of power supply units in parallel to supply power to the load.

[0047] Among them, the power required for titanium metal smelting power supply is relatively large, generally between 5MW and 10MW, mainly determined by the capacity of the manufacturer's smelting furnace. A single high-frequency switching power supply cannot achieve high-power output, and generally multiple units are connected in parallel, usually up to 20 to 50 units in parallel; by setting up a bus to connect multiple power supply units in parallel into a power supply device, each power supply unit is regarded as an independent system, which not only greatly increases the power of the power supply device, but also solves the defects of the traditional method of using one host and multiple slaves to coordinate multiple slaves. Both the host and multiple slaves require the host to control the start and stop of multiple slaves and the given signals, synchronization signals, etc., and generally use multiple groups of signal lines to connect, resulting in numerous signal lines and poor reliability, or using communication methods, there is a certain delay in communication, resulting in limited transient response and reduced reliability of the entire power supply system. Connecting multiple power supply units in parallel through a bus reduces the number of signal line connections, and each power supply unit does not affect each other, and the bus can control the power supply unit separately.

[0048] In the embodiment of the present invention, the number of signal lines can be significantly reduced by connecting multiple power supply units in parallel using a bus, and the power supply units do not interfere with each other. At the same time, the bus can independently control each power supply unit, thereby improving the flexibility and reliability of the power supply device and improving the transient response speed of the power supply device during operation.

[0049] In an optional embodiment of the present invention, the plurality of power supply units connected in parallel are provided with a backup function, and when one of the power supply units is damaged, the other power supply units can automatically back up to ensure the normal operation of the power supply device.

[0050] The backup function here refers to monitoring the operating status of each power supply unit to ensure that when any unit fails, the power supply device can quickly identify and automatically adjust the operating parameters so that the remaining power supply units can bear the additional load. This backup mechanism not only improves the stability of the power supply device, but also reduces the downtime caused by single point failures.

[0051] In the embodiment of the present invention, the stability and reliability of the power supply device are improved by arranging a backup function in each power supply unit.

[0052] like Figure 3 As shown, in an optional embodiment of the present invention, the titanium metal smelting power supply device includes:

[0053] A main control module, the main control module is used to coordinate the output of multiple parallel power supply units.

[0054] Among them, the main control module can coordinate the output of multiple parallel power supply units. In order to achieve efficient and stable power supply, the main control module adopts a variety of communication methods, such as serial communication, parallel communication and digital signal transmission, to ensure that the information transmission between each power supply unit and the main control module is timely and accurate.

[0055] Specifically, the main control module can collect relevant data, including current, voltage, power factor, and temperature, by monitoring the working status of each power supply unit in real time. These data are sent back to the main control module for analysis and processing. By analyzing this information, the main control module can determine which power supply units are in the best working state and whether there is a risk of overload or failure. When the power supply device is running, each power supply unit may bear different loads due to changes in the production process. The main control module adjusts the output power of each unit in real time to ensure that the load distribution of the entire system is reasonable.

[0056] In the embodiment of the present invention, the main control module coordinates the output of each power supply unit, ensures load balance and stability, and improves the reliability and safety of the power supply device.

[0057] like Figure 4 As shown, in an optional embodiment of the present invention, the power supply device includes:

[0058] An uncontrolled rectifier module, wherein the uncontrolled rectifier module rectifies the alternating current into direct current through uncontrolled rectification;

[0059] A high-frequency positive and negative pulse sequence module, which inverts the direct current through a modulation technology to output a high-frequency positive and negative pulse sequence;

[0060] A high-frequency transformer module, wherein the high-frequency transformer module determines the maximum voltage output by the power supply device through the primary-secondary winding ratio;

[0061] A unidirectional power module is used to rectify the high-frequency positive and negative pulse sequence to generate a DC power output.

[0062] Among them, uncontrolled rectification refers to the rectification process using non-controlled elements such as diodes. In this way, the rectifier only allows current to flow in one direction without controlling the conduction state of the current. Uncontrolled rectification usually uses the unidirectional conductivity of the diode to convert alternating current (AC) into direct current (DC). When the positive half cycle of the alternating current arrives, the diode is turned on and the current passes; while in the negative half cycle, the diode is turned off and the current does not flow. High-frequency positive and negative pulse sequence refers to a fast alternating positive and negative pulse signal generated in power electronics technology. It can achieve high-efficiency power conversion and control, and greatly improve the performance and response speed of the power supply system. The high-frequency transformer module contains windings on the primary side (input side) and the secondary side (output side), and uses the principle of the transformer for voltage conversion. The transformation ratio determines the relationship between the input voltage and the output voltage. The maximum output voltage can be set by the turns ratio of the primary and secondary windings. The unidirectional power module can convert the alternating current (AC) signal into a direct current (DC) signal through a rectifier. During the rectification process, only the positive voltage can pass, while the negative voltage is blocked, thereby generating a unidirectional DC power output.

[0063] Specifically, the high-frequency positive and negative pulse sequence module adopts high-frequency power devices, not limited to IGBT\MOS\S IC\GAN and other high-frequency power devices, and performs inversion through modulation to output high-frequency positive and negative pulse sequences; the high-frequency transformer module determines the maximum output voltage through the primary and secondary winding ratio. The transformer usually adopts amorphous magnetic cores or nanocrystalline magnetic cores. In this process, attention should be paid to the anti-saturation magnetic density design to ensure the stable operation of the transformer; the unidirectional power module adopts unidirectional power devices, not limited to fast recovery diodes\Schottky and other devices, to rectify the high-frequency pulse sequence and generate a DC power output.

[0064] In an embodiment of the present invention, by setting an uncontrolled rectifier module, a high-frequency positive and negative pulse sequence module, a high-frequency transformer module, and a unidirectional power module to process the alternating current, the output of the power supply device can be adjusted in time to cope with load changes and meet instantaneous load requirements.

[0065] According to another aspect of the present invention, a control method for a titanium metal smelting power supply device is provided, and the control method for titanium metal smelting power supply comprises:

[0066] S100, collecting load feedback information, where the load feedback information includes current and voltage;

[0067] S200, judging whether the current and voltage exceed the limit according to the load feedback information, if both the current and voltage do not exceed the limit, the output loop takes effect, and the output current and voltage are output; if the current exceeds the limit, the current loop takes effect, and the current loop is used to limit the output current; if the voltage exceeds the limit, the voltage loop takes effect, and the voltage loop is used to limit the output voltage;

[0068] S300, performing impedance matching calculation on the output current and voltage through a selector, correcting the output current and voltage, and ensuring that the current and voltage are output stably;

[0069] S400, outputting the corrected output current and voltage to a load through the output loop.

[0070] Among them, step S100 is responsible for real-time monitoring of the feedback information of the current and voltage of the load, which can be achieved by installing current sensors and voltage sensors, or by using a microcontroller (such as Arduino, Raspberry Pi, etc.) or a dedicated data acquisition card to collect current and voltage data in real time; wherein, step S200 is used to determine whether the current and voltage exceed the safety range based on the collected load feedback information. If they exceed the limit, the corresponding control loop (current loop or voltage loop) will be activated to limit them to ensure the safe operation of the equipment; wherein, the impedance matching performs matching calculations on the output current and voltage through a selector to maintain the stability of the output of the power supply device.

[0071] Specifically, transient response refers to the dynamic behavior of the system after being subjected to a sudden input signal or load change, that is, the transition process of the system from the initial state to the stable state. A faster transient response speed enables the power supply system to quickly adjust its output to maintain stability when the load undergoes a sudden change (such as an increase or decrease in load). A faster transient response speed can reduce voltage fluctuations and ensure that the power supply can meet the needs of the load in a timely manner. Good impedance matching can reduce the reflection of the signal during transmission, thereby improving the overall response speed of the power supply device. Reflection will cause unnecessary signal fluctuations and affect transient response. Impedance matching can be achieved through circuit loop calculation and real-time adjustment of the switching frequency and switching duty cycle of the load. The power supply device only needs to achieve the purpose of impedance matching based on its own feedback voltage and current.

[0072] In the embodiment of the present invention, the embodiment of the present invention can effectively suppress the influence of sudden load changes on the output voltage by adopting a control strategy of a current loop plus a voltage loop, shorten the stabilization time of the output voltage, and use the current loop and the voltage loop to adjust the power supply device when the load suddenly changes, which can not only effectively reduce the fluctuation of the output voltage, but also shorten the time for the output voltage to stabilize, thereby improving the reliability of the power supply device. The embodiment of the present invention adopts a strategy of combining a current loop and a voltage loop. When the voltage or current of the load suddenly changes, the current loop and the voltage loop can respond quickly, stabilize the output voltage and output current of the power supply device within a reasonable range, and effectively improve the transient response speed of the power supply device. The embodiment of the present invention also performs impedance matching calculations on the output current and voltage through a selector. By matching the impedance of the load and the power supply device, the power transmission efficiency can be maximized, ensuring that when the load changes, the current and voltage can be quickly adjusted to a new stable state, thereby improving the transient response capability.

[0073] In an optional embodiment of the present invention, the control method of the titanium metal smelting power supply device includes:

[0074] S500, configuring the power supply device to include multiple power supply units, and connecting the multiple power supply units in parallel by configuring a bus to supply power to the load.

[0075] Among them, the power required for titanium metal smelting power supply is relatively large, generally between 5MW and 10MW, mainly determined by the capacity of the manufacturer's smelting furnace. A single high-frequency switching power supply cannot achieve high-power output, and generally multiple units are connected in parallel, usually up to 20 to 50 units in parallel; by setting up a bus to connect multiple power supply units in parallel into a power supply device, each power supply unit is regarded as an independent system, which not only greatly increases the power of the power supply device, but also solves the defects of the traditional method of using one host and multiple slaves to coordinate multiple slaves. Both the host and multiple slaves require the host to control the start and stop of multiple slaves and the given signals, synchronization signals, etc., and generally use multiple groups of signal lines to connect, resulting in numerous signal lines and poor reliability, or using communication methods, there is a certain delay in communication, resulting in limited transient response and reduced reliability of the entire power supply system. Connecting multiple power supply units in parallel through a bus reduces the number of signal line connections, and each power supply unit does not affect each other, and the bus can control the power supply unit separately.

[0076] In the embodiment of the present invention, the number of signal lines can be significantly reduced by connecting multiple power supply units in parallel using a bus, and the power supply units do not interfere with each other. At the same time, the bus can independently control each power supply unit, thereby improving the flexibility and reliability of the power supply device and improving the transient response speed of the power supply device during operation.

[0077] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution disclosed in the present invention can be achieved, and this document does not limit this.

[0078] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A titanium metal smelting power supply device, characterized in that: The titanium metal smelting power supply device comprises: An information acquisition module, wherein the information acquisition module is used to acquire load feedback information, wherein the load feedback information includes current and voltage; A judgment module, the judgment module is used to judge whether the current and voltage exceed the limit according to the load feedback information. If both the current and voltage are within the limit, the output loop takes effect and outputs the current and voltage. If the current exceeds the limit, the current loop takes effect and the current loop is used to limit the output current. If the voltage exceeds the limit, the voltage loop takes effect and the voltage loop is used to limit the output voltage. An impedance matching module, wherein the impedance matching module performs impedance matching calculation on the output current and voltage through a selector, corrects the output current and voltage, and ensures stable output of the current and voltage; The output module is used to output the corrected output current and voltage to the load through the output loop.

2. The titanium metal smelting power supply device according to claim 1, characterized in that: The power supply device is configured as a plurality of power supply units, and a bus is provided to connect the plurality of power supply units in parallel to supply power to the load.

3. The titanium metal smelting power supply device according to claim 2, characterized in that: The multiple power supply units connected in parallel are provided with a backup function. When one of the power supply units is damaged, the other power supply units can automatically back up to ensure the normal operation of the power supply device.

4. The titanium metal smelting power supply device according to claim 2, characterized in that: The titanium metal smelting power supply device comprises: A main control module, the main control module is used to coordinate the output of multiple parallel power supply units.

5. The titanium metal smelting power supply device according to claim 4, characterized in that: The main control module is provided with sensors for monitoring the output voltage and output current of each of the power supply units, and determines the output allocation of each of the power supply units according to the current output state.

6. The titanium metal smelting power supply device according to claim 5, characterized in that: The main control module is provided with an outer constant voltage ring, which is used to maintain voltage stability and coordinate the given values ​​of the output voltages of the various power supply devices so that the voltage outputs of the various power supply units are the same.

7. The titanium metal smelting power supply device according to claim 1, characterized in that: The power supply device comprises: An uncontrolled rectifier module, wherein the uncontrolled rectifier module rectifies the alternating current into direct current through uncontrolled rectification; A high-frequency positive and negative pulse sequence module, which inverts the direct current through a modulation technology to output a high-frequency positive and negative pulse sequence; A high-frequency transformer module, wherein the high-frequency transformer module determines the maximum voltage output by the power supply device through the primary-secondary winding ratio; A unidirectional power module is used to rectify the high-frequency positive and negative pulse sequence to generate a DC power output.

8. A control method for a titanium metal smelting power supply device, characterized in that: The control method for power supply for titanium metal smelting comprises: S100, collecting load feedback information, where the load feedback information includes current and voltage; S200, judging whether the current and voltage exceed the limit according to the load feedback information, if both the current and voltage do not exceed the limit, the output loop takes effect, and the output current and voltage are output; if the current exceeds the limit, the current loop takes effect, and the current loop is used to limit the output current; if the voltage exceeds the limit, the voltage loop takes effect, and the voltage loop is used to limit the output voltage; S300, performing impedance matching calculation on the output current and voltage through a selector, correcting the output current and voltage, and ensuring that the current and voltage are output stably; S400, outputting the corrected output current and voltage to a load through the output loop.

9. The control method of the titanium metal smelting power supply device according to claim 8, characterized in that: The control method of the titanium metal smelting power supply device includes: S500, configuring the power supply device to include multiple power supply units, and connecting the multiple power supply units in parallel by configuring a bus to supply power to the load.

10. The control method of the titanium metal smelting power supply device according to claim 9, characterized in that: The control method of the titanium metal smelting power supply device includes: The outputs of the plurality of parallel-connected power supply units are coordinated by setting a main control module.

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