Driving power supply, driving method and system of central solenoid, and fusion reaction system

Abstract

The invention provides a driving power supply, a driving method and a driving system of a central solenoid, and a fusion reaction system. In the power supply module of the driving power supply, the anode of a capacitor unit is connected with the first end of a first power unit, the second end of the first power unit and the first end of a second power unit are connected with an auxiliary node, and the second end of the second power unit is connected with the cathode of the capacitor unit; the second end of the second power unit in any power supply module is connected with the second end of the second power unit in the other power supply module; an auxiliary node in one power supply module set is connected with the output ends of a current-limiting resistor, a third power unit and an auxiliary diode, the other ends of the current-limiting resistor and the third power unit and the input end of the auxiliary diode are connected with one end of a central solenoid, and an auxiliary node in the other power supply module set is connected with the other end of the central solenoid; the power unit is controlled, so that the capacitor unit for transmitting current is switched among different power supply module sets; the driving power supply can transmit current with a relatively high change rate.

Description

[0001] This application claims the priority of a Chinese patent application titled "Drive Power Supply, Drive Method and System for Central Solenoid, and Fusion Reaction System" with the application number "202311827556.3" and filed with the Chinese Patent Office on December 27, 2023. The entire content of which is incorporated herein by reference. Technical Field

[0002] This application relates to the field of power electronics technology, and particularly to a drive power supply, a drive method and system for a central solenoid, and a fusion reaction system. Background Art

[0003] With the development of electronic technology, there are more and more electronic devices with various functions, and different functional electronic devices have different requirements for current.

[0004] Exemplarily, in a nuclear fusion reaction device, a pulsed current with a relatively high rate of change needs to be transmitted to the central solenoid to cause a rapid change in the surrounding electromagnetic field, so as to ionize and break down around the coil to form an initial plasma ring. Then, the plasma in the initial plasma ring can be heated to the fusion reaction temperature to generate a fusion reaction.

[0005] However, the current rate of change of the current transmitted to the central solenoid is relatively low, which is difficult to meet the requirements of the nuclear fusion reaction device. Therefore, there is an urgent need for a power supply to transmit a pulsed current with a relatively high rate of change to the central solenoid. Summary of the Invention

[0006] In view of this, this application provides a drive power supply, a drive method and system for a central solenoid, and a fusion reaction system, which can transmit a pulsed current with a relatively high rate of change to the central solenoid to meet the requirements of the nuclear fusion reaction.

[0007] According to one aspect of this application, a drive power supply is provided. The drive power supply includes: two power supply module sets, each power supply module set includes at least one power supply module; each power supply module includes a capacitor unit, a first power unit and a second power unit; the positive pole of the capacitor unit is connected to the first end of the first power unit, the second end of the first power unit and the first end of the second power unit are both connected to an auxiliary node, and the second end of the second power unit is connected to the negative pole of the capacitor unit; the second end of the second power unit in any power supply module of any power supply module set is connected to the second end of the second power unit in a power supply module of the other power supply module set;

[0008] The driving power supply further includes a current-limiting resistor, a third power unit, and an auxiliary diode; the two power supply modules are concentrated, and the auxiliary node of one concentrated power supply module is connected to the first end of the current-limiting resistor, the first end of the third power unit, and the output end of the auxiliary diode. The second end of the current-limiting resistor, the second end of the third power unit, and the input end of the auxiliary diode are connected to one end of the central solenoid, and the auxiliary node of the other concentrated power supply module is connected to the other end of the central solenoid;

[0009] Each power unit is controlled to turn on or off, so that the capacitor unit for transmitting current to the central solenoid switches between the capacitor units in the first power supply module and the capacitor units in the second power supply module; wherein, the first power supply module and the second power supply module belong to different power supply module sets respectively.

[0010] According to another aspect of the present application, a driving system for a central solenoid is provided, and the driving system includes: a host computer, a serial port server, a driving unit of a power unit, and the above-mentioned driving power supply;

[0011] The host computer is connected to the serial port server, and the host computer is configured to send control instructions to the driving unit of the power unit through the serial port server;

[0012] The driving unit of the power unit is configured to control the power unit in the driving power supply to turn on or off based on the received control instructions.

[0013] According to still another aspect of the present application, a driving method for a central solenoid is provided, which is applied to the above-mentioned driving system, and the method includes:

[0014] Turn on the first power unit group and the third power unit in the driving power supply included in the driving system, so that the capacitor unit in the first power supply module in the driving power supply supplies power to the central solenoid; wherein, the first power unit group includes the first power unit in the first power supply module and the second power unit in the second power supply module;

[0015] When the current transmitted in the central solenoid reaches the first current value, turn off the first power unit group and the third power unit, so that the capacitor unit in the first power supply module stops supplying power to the central solenoid;

[0016] Turn on the second power unit group and the third power unit in the driving power supply, so that the capacitor unit in the second power supply module supplies power to the central solenoid, and the current direction on the central solenoid is reversed; wherein, the second power unit group includes the first power unit in the second power supply module and the second power unit in the first power supply module;

[0017] When the current flowing through the central solenoid reaches the second current value, turn off the second power unit group and the third power unit, so that the capacitor unit in the second power supply module stops supplying power to the central solenoid.

[0018] According to another aspect of the present application, a fusion reaction system is provided, which includes: a nuclear fusion reaction device and the above-mentioned drive system;

[0019] The drive power supply in the drive system is connected to the central solenoid of the nuclear fusion reaction device, and is used to transmit pulsed current to the central solenoid;

[0020] The central solenoid is used to generate a magnetic field based on the pulsed current, and use the magnetic field to generate an initial plasma ring, and the plasma in the initial plasma ring is used to be heated to the fusion reaction temperature to generate a fusion reaction.

[0021] In the drive power supply provided by the present application, there are two power supply module sets respectively connected to both ends of the central solenoid. Each power supply module in each power supply module set includes a capacitor unit, a first power unit and a second power unit connected in sequence, and the auxiliary node between the two power units is connected to the central solenoid. The second ends of each second power unit in any one power supply module set are connected to the second ends of a second power unit in the other power supply module set. The drive power supply can turn on or off each power unit, so that the capacitor unit that supplies current to the central solenoid switches between the capacitor units in different power supply module sets. The switching of the capacitor unit can reverse the direction of the current flowing through the central solenoid, and thus can alternately transmit positive and negative pulsed currents to the central solenoid, ensuring a relatively high change rate of the current transmitted to the central solenoid. Description of the Drawings

[0022] Figure 1 is a schematic circuit structure diagram of a drive power supply for a central solenoid provided by an embodiment of the present application;

[0023] Figure 2 is a schematic circuit structure diagram of another drive power supply for a central solenoid provided by an embodiment of the present application;

[0024] Figure 3 is a schematic circuit structure diagram of yet another drive power supply for a central solenoid provided by an embodiment of the present application;

[0025] Figure 4 is a schematic circuit structure diagram of still another drive power supply for a central solenoid provided by an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of the current change situation on a central solenoid provided by an embodiment of the present application;

[0027] Figure 6 It is a schematic diagram of a partial circuit structure in a driving power supply for a central solenoid provided by an embodiment of the present application;

[0028] Figure 7 It is a schematic diagram of the structure of a control system provided by an embodiment of the present application;

[0029] Figure 8 It is a flowchart of a driving method for a central solenoid provided by an embodiment of the present application;

[0030] Figure 9 It is a flowchart of another driving method for a central solenoid provided by an embodiment of the present application;

[0031] Figure 10 It is a simple working flowchart of a driving system for a central solenoid provided by an embodiment of the present application. Detailed implementation manners

[0032] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementations disclosed below.

[0033] The terms used in one or more embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit one or more embodiments of the present application. The singular forms "a", "the", and "said" used in one or more embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of the present application refers to and includes any or all possible combinations of one or more of the associated listed items. The term "at least one" in one or more embodiments of the present application refers to "one or more", and "a plurality" refers to "two or more". The term "comprising" is an open-ended description and should be understood as "including but not limited to", and other contents may also be included on the basis of the described contents.

[0034] It should be understood that although the terms "first", "second", etc. may be used in one or more embodiments of the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of the present application, "first" may also be referred to as "second", and similarly, "second" may also be referred to as "first". Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0035] In the field of electronic technology, various electronic devices require a power supply device for power supply, and the power supplies required by different electronic devices may vary. The power supply required for a nuclear fusion reaction device is different from that required for ordinary electronic devices. By way of example, a spherical tokamak (ST) device is a type of nuclear fusion reaction device. The ST device includes a center solenoid (CS) coil stacked vertically. The CS coil needs to transmit a strong current pulse, causing a rapid change in the surrounding electromagnetic field to generate a strong electric field, so that the gas surrounding the coil is ionized and broken down to form an initial plasma ring. Then, by heating the plasma in the initial plasma ring to the fusion reaction temperature, nuclear fusion reaction is achieved. The CS coil plays a key role in the induction generation, shaping, and stabilization of the plasma current in the ST device. To enable the CS coil to generate a stable strong electric field to produce plasma, the current change rate (di / dt) transmitted to the CS coil needs to be relatively high, and periodic positive and negative current pulses are formed within a short time. However, the current change rate of the power supply output at present is still relatively low, making it difficult to meet this requirement.

[0036] The following embodiments of the present application provide a drive power supply for a center solenoid, which can supply a current with periodic positive and negative pulses to the center solenoid of a nuclear fusion reaction device. Its current change rate is relatively high, which can enable the center solenoid to generate the required strong electric field, thereby ensuring the generation effect of the plasma. In the embodiments of the present application, the center solenoid mentioned all refers to the center solenoid coil. The embodiments of the present application also relate to a drive method and a drive system for a center solenoid, as well as a fusion reaction system.

[0037] Figure 1 It is a schematic circuit structure diagram of a drive power supply for a center solenoid provided by an embodiment of the present application. As Figure 1 shown, the drive power supply 10 includes two power supply module sets. For example, the two power supply module sets include a first power supply module set 101 and a second power supply module set 102. The two power supply module sets are used to connect to both ends of the load respectively. In the embodiments of the present application, the load targeted is the center solenoid L in the nuclear fusion reaction device. Hereinafter, an example is given where the first power supply module set 101 is connected to the first end of the center solenoid L, and the second power supply module set 102 is connected to the second end of the center solenoid L.

[0038] The driving power supply 10 further includes: a current-limiting resistor R3, a third power unit G3, and an auxiliary diode D3. The current-limiting resistor R3 can be connected in series with the center solenoid L, the third power unit G3 is connected in parallel with the current-limiting resistor R3, and the auxiliary diode D3 is connected in parallel with the third power unit G3. For example, the first end of the current-limiting resistor R3, the first end of the third power unit G3, and the output end of the auxiliary diode D3 are connected, and the second end of the current-limiting resistor R3, the second end of the third power unit G3, and the input end of the auxiliary diode D3 are connected. The structure composed of the current-limiting resistor R3, the third power unit G3, and the auxiliary diode D3 can be called a switching resistor. Here, taking the connection between the first power supply module set 101 and the first end of the center solenoid L through the switching resistor as an example.

[0039] Each of the two power supply module sets includes at least one power supply module. Figure 1 Only one power supply module in each of the two power supply module sets is shown. Each power supply module in the two power supply module sets may include a capacitor unit, a first power unit, and a second power unit. In each power supply module, the positive electrode of the capacitor unit is connected to the first end of the first power unit; the second end of the first power unit is connected to the first end of the second power unit and both are connected to the auxiliary node J, and the auxiliary node J is located between the first power unit and the second power unit; the second end of the second power unit is connected to the negative electrode of the capacitor unit.

[0040] In the embodiment of the present application, the capacitor unit included in the power supply module in the first power supply module set 101 is called the first capacitor unit C1, and the capacitor unit included in the power supply module in the second power supply module set 102 is called the second capacitor unit C2. In the first power supply module set 101, the first power unit included in the power supply module is represented by the power unit G11, and the second power unit is represented by the power unit G12. In the second power supply module set, the first power unit included in the power supply module is represented by the power unit G21, and the second power unit is represented by the power unit G22.

[0041] In the two power supply module sets, the second end of the second power unit in any power supply module of any power supply module set is connected to the second end of the second power unit in a power supply module of the other power supply module set. For example, Figure 1 in the case where each of the two power supply module sets includes one power supply module, the second ends of the two second power units in the two power supply modules are connected. For the convenience of description, hereinafter, the connection of the second ends of the two second power units is simply referred to as the connection of the two second power units.

[0042] In some embodiments, a power supply module set includes multiple power supply modules. It is only necessary to ensure that each second power unit is connected to a second power unit in another power supply module set. The embodiments of the present application do not limit how the second power units of each power supply module are specifically connected. For example, each second power unit can be connected to only one second power unit, or there can be a second power unit connected to multiple second power units in another power supply module set.

[0043] The auxiliary nodes J in the two power supply module sets are used to connect the two ends of the central solenoid L respectively. That is, each power supply module set uses the auxiliary nodes J in its respective power supply modules to connect the end of the central solenoid L that needs to be connected by this power supply module set. For example Figure 1 in, the auxiliary node J in the first power supply module set 101 is connected to the first end of the central solenoid L through a switching resistor, and the auxiliary node J in the second power supply module set 102 is connected to the second end of the central solenoid L. Specifically, the auxiliary node J in the first power supply module set 101 is connected to the first end of the current-limiting resistor R3, the first end of the third power unit G3, and the output end of the auxiliary diode D3. The second end of the current-limiting resistor R3, the second end of the third power unit G3, and the input end of the auxiliary diode D3 are connected to the first end of the central solenoid L. If the first power supply module set 101 includes multiple power supply modules, then the auxiliary nodes J between the two power units in each power supply module in the multiple power supply modules are all connected to the first end of the central solenoid L through a switching resistor. Similarly, for the second power supply module set 102, the auxiliary nodes J in its respective power supply modules are all connected to the second end of the central solenoid L.

[0044] In the drive power supply 10, each power unit (including the first power unit and the second power unit in the power supply module, and the third power unit) can be controlled to be turned on or off, so that the capacitor unit for transmitting current to the central solenoid L can be switched between the capacitor unit in the first power supply module and the capacitor unit in the second power supply module. The first power supply module and the second power supply module belong to different power supply module sets respectively. In the embodiments of the present application, the so-called first power supply module and second power supply module are only used to distinguish that they belong to different power supply module sets. The first power supply module and the second power supply module can be replaced with each other. The control methods for the first power supply module and the second power supply module can be the same, and the introductions to the first power supply module and the second power supply module can refer to each other. For example, the first power supply module is a power supply module in the first power supply module set 101, and the second power supply module is a power supply module in the second power supply module set 102. Therefore, the capacitor unit for transmitting current to the central solenoid L is switched between the first capacitor unit C1 and the second capacitor unit C2. As the capacitor unit for power supply is switched, the direction of the current on the central solenoid L will change, and positive and negative currents will be alternately transmitted in the central solenoid L, that is, it is equivalent to transmitting positive and negative current pulses with a relatively large rate of change of the transmitted current.

[0045] In the target stage of transmitting current from the capacitor unit of the first power supply module to the central solenoid, the first power unit in the first power supply module can be controlled to turn on and the second power unit can be controlled to turn off, and the first power unit in the second power supply module can be controlled to turn off and the second power unit can be controlled to turn on. By swapping the first power supply module and the second power supply module, the control method of the power unit in the target stage of transmitting current from the capacitor unit of the second power supply module to the central solenoid can be obtained, which will not be elaborated here.

[0046] Exemplarily, for Figure 1 the shown power supply module set, the power units G11 and G22 can be controlled to turn on, and the power units G12 and G21 can be controlled to turn off. In this way, the first capacitor unit C1, the power unit G11, the power unit G22, and the central solenoid L form a current loop, and the first capacitor unit C1 transmits current to the central solenoid L. Also exemplarily, the power units G12 and G21 can be controlled to turn on, and the power units G11 and G22 can be controlled to turn off. In this way, the second capacitor unit C2, the power unit G21, the power unit G12, and the central solenoid L form a current loop, and the second capacitor unit C2 transmits current to the central solenoid L.

[0047] In the embodiments of the present application, the first capacitor unit C1 can be first used to supply power to the central solenoid L, and then it can be switched to supply power to the central solenoid L by the second capacitor unit C2. In this case, a positive current is first transmitted on the central solenoid L and then switched to transmit a negative current. Or, the second capacitor unit C2 can be first used to supply power to the central solenoid L, and then it can be switched to supply power to the central solenoid L by the first capacitor unit C1. In this case, a negative current is first transmitted on the central solenoid L and then switched to transmit a positive current.

[0048] After the first capacitor unit C1 and the second capacitor unit C2 alternately transmit current to the central solenoid L for one power supply cycle, the first capacitor unit C1 and the second capacitor unit C2 can be charged, and after the charging is completed, current is transmitted to the central solenoid L again. In some embodiments, if the capacity of the capacitor unit is large, the first capacitor unit C1 and the second capacitor unit C2 can be alternately used to transmit current to the central solenoid L for multiple power supply cycles before charging. The capacitor unit can be obtained by connecting multiple capacitors in parallel. In the embodiments of the present application, one power supply cycle includes the process of the first capacitor unit C1 and the second capacitor unit C2 respectively supplying power to the central solenoid L once.

[0049] In the embodiments of the present application, by controlling the turning on or off of the third power unit G3, it can be controlled whether the current-limiting resistor R3 functions in the circuit. The current-limiting resistor R3 can play a current-limiting role in the freewheeling stage of the central solenoid L.

[0050] During the process of the capacitor unit supplying power to the central solenoid L, the third power unit G3 can be kept turned on. In this way, it can be ensured that the current does not flow through the current-limiting resistor R3 during this process, but flows through the third power unit G3 and is transmitted to the central solenoid L, avoiding waste of electric energy and ensuring that the current on the central solenoid L reaches the required value more quickly. Exemplarily, the third power unit G3 is kept turned on when the power units G11 and G22 are turned on, and the third power unit G3 is also kept turned on when the power units G12 and G21 are turned on.

[0051] In one implementation manner, the third power unit G3 can be turned on first and then the power units G11 and G22 (or the power units G12 and G21) can be turned on. In this way, it can be avoided that the current transmitted by the capacitor unit passes through the current-limiting resistor R3, ensuring a relatively high power supply efficiency for the central solenoid L. In one embodiment, the third power unit G3 and the power units G11 and G22 can also be turned on simultaneously, or the power units G11 and G22 can be turned on first. The power units G11 and G22 do not necessarily need to be turned on simultaneously.

[0052] During the process when the capacitor unit does not need to supply power to the central solenoid L, the third power unit G3 can be kept turned off. In this way, it can be ensured that the current flows through the current-limiting resistor R3 during the freewheeling process of the central solenoid L, increasing the rate at which the current in the circuit decreases and improving the current change rate. Exemplarily, the third power unit G3 can be turned off simultaneously when the power units G11 and G22 (or the power units G12 and G21) are turned off.

[0053] By adopting the above-mentioned switching resistor in the driving power supply 10 of the embodiment of the present application, without increasing the power of the power supply, the driving power supply 10 can be made to have a higher current change ability, making it easier to achieve ionization breakdown of the gas and significantly increasing the steady-state value of the plasma current.

[0054] The following combines Figure 2 and Figure 3 to give an exemplary illustration of the case where the power supply module set in the driving power supply 10 includes multiple power supply modules. Figure 2 FIG. is a schematic circuit structure diagram of another driving power supply for a central solenoid provided by an embodiment of the present application. Figure 2 Taking the second power supply module set 102 including two power supply modules as an example for illustration. As Figure 2 shown, the auxiliary nodes J in the two power supply modules in the second power supply module set 102 are both connected to the second end of the central solenoid L, and the second ends of the two second power units G22 in the two power supply modules are both connected to the second end of the second power unit G12 in the first power supply module set 101.

[0055] The capacitive unit that powers the central solenoid L can be switched between the first capacitive unit C1 and any one of the second capacitive units C2 in the second power supply module set 102. For example, in two power supply cycles, the capacitive unit that powers the central solenoid L can be switched from the first capacitive unit C1 to two different second capacitive units C2 in the second power supply module set 102 respectively. During one power supply cycle, when the first capacitive unit C1 powers the central solenoid L, the second power unit G22 through which the current flows can belong to the same power supply module as the second capacitive unit C2 used in this power supply cycle, or can be the second power unit G22 in other power supply modules in the second power supply module set 102.

[0056] In the embodiments of the present application, only the case where the second power supply module set 102 includes multiple power supply modules is introduced by way of example. The case where the first power supply module set 101 includes multiple power supply modules can be analogized accordingly and will not be elaborated here. For the case where both the first power supply module set 101 and the second power supply module set 102 include multiple power supply modules, each second power unit can be connected to multiple other second power units. For example, each second power unit in the first power supply module set 101 and each second power unit in the second power supply module set 102 are all connected. This way can also be analogized based on Figure 2 the introduction; or, each second power unit can also be connected to only one other second power unit. The following will introduce this way in combination with Figure 3 this.

[0057] Figure 3 FIG. is a schematic circuit structure diagram of another driving power supply for a central solenoid provided by an embodiment of the present application, and Figure 3 is schematically shown taking the case where both the first power supply module set 101 and the second power supply module set 102 include two power supply modules as an example. As Figure 3 shown, the number of second power units in the first power supply module set 101 and the second power supply module set 102 is the same, and each second power unit in the first power supply module set 101 is connected to each second power unit in the second power supply module set 102 in a one-to-one correspondence.

[0058] Exemplarily, two power supply modules belonging to the first power supply module set 101 and the second power supply module set 102 respectively form a power supply module pair, and the second ends of the two second power units in a power supply module pair are connected. The two capacitor units in a power supply module pair can switch to supply power to the central solenoid L in one power supply cycle. As described above, the first power supply module and the second power supply module form a power supply module pair. Different power supply module pairs can be replaced with each other. For example, after the power of the capacitor unit in a power supply module pair is lower than the specified value, the power units in this power supply module pair can be turned off, and the capacitor unit in other power supply modules can be replaced to supply power to the central solenoid L. In this way, continuous power supply to the central solenoid L for multiple cycles can be achieved.

[0059] Figure 1 The two power supply modules in also form a power supply module pair. It can be in Figure 1 On the basis of the driving power supply 10 shown, at least one power supply module pair with the same structure and connection relationship as the two power supply modules shown in Figure 1 is added to obtain a driving power supply 10 in which each power supply module set includes multiple power supply modules (such as the driving power supply 10 shown in Figure 3 ).

[0060] In the embodiments of the present application, by switching the first capacitor unit C1 and the second capacitor unit C2 to transmit current to the central solenoid L, multiple positive and negative current pulses can be generated within a short time. When the positive current transmitted by the first capacitor unit C1 to the central solenoid L suddenly decreases after reaching a predetermined value, a strong electric field is generated around the central solenoid L, and then a plasma current is generated. After the first capacitor unit C1 stops supplying power, the current on the central solenoid L will gradually decrease, and the plasma current can still exist during this process. In the embodiments of the present application, during this process, the second capacitor unit C2 is made to transmit negative current to the central solenoid L, so that the duration of the plasma current can be increased and the maintenance time of the breakdown electric field can be extended.

[0061] In the embodiments of the present application, by setting a switching resistor, the current change rate in the circuit is increased, ensuring that gas breakdown is more easily achieved to obtain plasma. For example, before the switching resistor is added, the current change rate in the circuit can reach 700 A / ms (amperes per millisecond), and after the switching resistor is set, the current change rate can reach 1000 A / ms. In some embodiments, different value current limiting resistors R3 can be replaced in the switching resistor according to requirements.

[0062] In the embodiments of the present application, the power supply module set may include a plurality of power supply modules. Thus, the capacitor unit for supplying power to the central solenoid can be switched among the plurality of power supply modules, and a plurality of current pulses can be continuously provided to the central solenoid. Furthermore, multiple gas breakdowns can be achieved in a short time to form plasma, which is beneficial to extending the duration of the nuclear fusion reaction. In some embodiments, a capacitor unit with a relatively large capacitance can be used to achieve multiple power supplies to the central solenoid and multiple gas breakdowns. For example, the capacitance of the capacitor unit can be 8.4 farads. The specific value of this capacitance can also be changed based on actual requirements and is not limited herein.

[0063] In the embodiments of the present application, the voltage value when the capacitor unit outputs a pulsed current can reach 400 volts, and the current value can reach 20 kA, enabling a large current pulse to be achieved at a relatively low voltage. Based on the power supply of this capacitor unit, the maintenance time of the plasma can reach 100 milliseconds. Since this voltage value is relatively low, the insulation requirements and insulation distances at various parts of the circuit can be reduced, resulting in a lower manufacturing cost and making it easier to miniaturize the drive power supply. In the embodiments of the present application, the capacitances, output voltages, and output currents of the capacitor units in each power supply module may be the same, or some power supply modules may use different capacitor units, which is not limited herein.

[0064] In summary, the drive power supply provided by the embodiments of the present application includes two power supply module sets respectively connected to both ends of the central solenoid. Each power supply module in each power supply module set includes a capacitor unit, a first power unit, and a second power unit connected in sequence, and the auxiliary node between the two power units is connected to the central solenoid. The second end of each second power unit in any one power supply module set is connected to the second end of a second power unit in the other power supply module set. The drive power supply can turn on or off each power unit to cause the capacitor unit that transmits current to the central solenoid to switch between the capacitor units in different power supply module sets. The switching of the capacitor unit can reverse the direction of the current transmitted on the central solenoid, and thus can alternately transmit positive and negative pulsed currents to the central solenoid, ensuring a relatively high change rate of the current transmitted to the central solenoid.

[0065] In some embodiments, the voltage across the center solenoid L can be controlled by pulse width modulation (PWM) to control the rate of change of the current in the center solenoid L, thereby controlling the driving ability of the plasma current. During the target stage when the capacitor unit of each power supply module transfers current to the center solenoid (hereinafter referred to as the power supply stage of this capacitor unit), the on-duty ratio of the power unit turned on during this target stage can also be controlled to control the turn-on and turn-off of the power unit based on the on-duty ratio and adjust the current value in the circuit. For example, during the power supply stage of the first capacitor unit C1, the on-duty ratios of the power units G12 and G21 can be controlled to adjust the current value transferred to the center solenoid L. During the power supply stage of the second capacitor unit C2, the on-duty ratios of the power units G11 and G22 can be controlled.

[0066] During the power supply stage of the capacitor unit of any one of the first power supply module and the second power supply module, the on-duty ratio of the first power unit in this power supply module is less than 1, and the on-duty ratio of the second power unit in the other power supply module is equal to 1. The on-duty ratio can be obtained based on the target voltage corresponding to the center solenoid and the output voltage of this capacitor unit. The target voltage is the operating voltage required for the center solenoid to excite the plasma.

[0067] Exemplarily, during the power supply stage of the first capacitor unit C1 in the drive power supply 10, the current on the center solenoid L climbs positively. During this stage, the on-duty ratio of the power unit G11 is less than 1, and the power unit G11 turns on and off alternately; the on-duty ratio of the power unit G22 is 1, and the power unit G22 remains in the on state continuously. During the power supply stage of the second capacitor unit C2, the current on the center solenoid is transmitted reversely. During this stage, the on-duty ratio of the power unit G21 is less than 1, and the power unit G21 turns on and off alternately; the on-duty ratio of the power unit G12 is 1, and the power unit G12 remains in the on state continuously.

[0068] In some embodiments, during the power supply phase of the capacitor unit in any power supply module, the sum of the on-duty ratios of the first power unit and the second power unit in the power supply module may be equal to 1, and the first power unit and the second power unit may be turned on alternately. For example, during the power supply phase of the first capacitor unit C1, the power units G11 and G12 may be turned on periodically and alternately. When the power unit G11 is turned on, the power unit G12 is turned off, and the first capacitor unit C1 discharges to the central solenoid L; when the power unit G12 is turned on, the power unit G11 is turned off, and the current on the central solenoid L continues to flow through the power units G22 and G12. Another example is that during the power supply phase of the second capacitor unit C2, the power units G21 and G22 may be turned on periodically and alternately. When the power unit G21 is turned on, the power unit G22 is turned off, and the second capacitor unit C2 discharges to the central solenoid L; when the power unit G22 is turned on, the power unit G21 is turned off, and the current on the central solenoid L continues to flow through the power units G12 and G22.

[0069] In the embodiments of the present application, during the power supply phase of the capacitor unit in any power supply module, the on-duty ratio of the first power unit in the power supply module may be obtained based on the target voltage corresponding to the central solenoid and the output voltage of the capacitor unit. The target voltage may be the voltage required for the central solenoid to excite the plasma. By way of example, assume that the current-limiting resistor R3 is not considered. During the power supply phase of the first capacitor unit C1, the target voltage corresponding to the central solenoid L is U1, and the output voltage of the first capacitor unit C1 is U0. Then the on-duty ratio of the power unit G11 may be U0 / U1, and the on-duty ratio of the power unit G12 may be 1 - U0 / U1. During the power supply phase of the second capacitor unit C2, the target voltage corresponding to the central solenoid L is -U2, and the output voltage of the second capacitor unit C2 is U0. Then the on-duty ratio of the power unit G21 may be -U0 / U2, and the on-duty ratio of the power unit G22 may be 1 + U0 / U2.

[0070] In the embodiments of the present application, by controlling the on-duty ratios of the respective power units, the plasma maintenance duration can reach 500 milliseconds, extending the plasma maintenance duration and enhancing the effect of the plasma generating a fusion reaction.

[0071] In some embodiments, after the power supply stage of the capacitor unit in any power supply module, there may also be a freewheeling stage of the central solenoid L. In this freewheeling stage, the two power units in this power supply module may both be turned off, while the two power units in another power supply module may be alternately turned on. For example, after the power supply stage of the first capacitor unit C1, the central solenoid L may be in a freewheeling stage for a certain period of time. In this stage, the power units G11 and G12 remain off, and the power units G21 and G22 may be periodically and alternately turned on. After the power supply stage of the second capacitor unit C2, the central solenoid L may also be in a freewheeling stage for a certain period of time. In this stage, the power units G21 and G22 remain off, and the power units G11 and G12 may be periodically and alternately turned on.

[0072] Figure 5 FIG. 4 is a schematic diagram showing the current change situation on the central solenoid provided by an embodiment of the present application. Among them, the curve Q1 represents the current change situation on the central solenoid brought by the natural discharge of the capacitor unit and the central solenoid without controlling the on-duty ratio of the power unit; the curve Q2 represents the current change situation on the central solenoid in the embodiment of the present application when the on-duty ratio of the power unit is controlled. It can be seen from the comparison of the curves Q1 and Q2 that in the embodiment of the present application, by controlling the on-duty ratio, the current change rate in the current drop stage of the central solenoid can be controlled. For example, the current change rate can be kept decreasing at a fixed rate, and the duration of this drop stage can be extended, so as to improve the maintenance duration of the plasma.

[0073] The foregoing content only introduces the drive power supply 10 of the central solenoid for some essential components. On the basis of the foregoing components, the drive power supply 10 may further include other additional components. Figure 4 FIG. 5 is a schematic circuit structure diagram of another drive power supply of the central solenoid provided by an embodiment of the present application. The following combines Figure 4 to introduce the situation where the drive power supply 10 includes other additional components.

[0074] Each power supply module of the drive power supply 10 may further include: two freewheeling diodes, and the two freewheeling diodes are respectively connected in parallel with the two power units in the power supply module. For each of the first power unit and the second power unit, the first end of the power unit is also connected to the output end of a freewheeling diode, and the second end of the power unit is also connected to the input end of the freewheeling diode. As Figure 4 shown, the first power unit G11 in the first power supply module set 101 is connected in parallel with the first freewheeling diode D11, and the second power unit G12 is connected in parallel with the second freewheeling diode D12; the first power unit G21 in the second power supply module set 102 is connected in parallel with the third freewheeling diode D21, and the second power unit G22 is connected in parallel with the fourth freewheeling diode D22.

[0075] The freewheeling diode is used to provide a freewheeling effect for the central solenoid L when the capacitor unit stops supplying power to the central solenoid L. In this way, it can ensure that when the current in the circuit changes suddenly, the current on the central solenoid L still flows in the original direction, avoiding the situation where the central solenoid L is damaged due to excessive voltage across its two ends.

[0076] Exemplarily, for Figure 4 the driving power supply 10 shown, the power units G11 and G22 can be controlled to be turned on first, and the power units G12 and G21 can be controlled to be turned off, so that the first capacitor unit C1 supplies power to the central solenoid L. At this time, the power supply stage of the first capacitor unit C1 starts. After the current transmitted in the central solenoid L reaches the first current value, the power units G11 and G22 can be turned off so that the first capacitor unit C1 stops supplying power to the central solenoid L. At this time, the power supply stage of the first capacitor unit C1 ends. Thereafter, the current in the central solenoid L can be freewheeled through the third freewheeling diode D21, the second capacitor unit C2, and the second freewheeling diode D12. This stage is also the above-mentioned freewheeling stage. The first current value can be the current peak value of the required pulsed current. In this freewheeling stage, the power units G21 and G22 can be alternately turned on.

[0077] After that, the power units G12 and G21 can be controlled to be turned on, and the power units G11 and G22 can be controlled to be turned off, so that the second capacitor unit C2 supplies power to the central solenoid L and reverses the current direction on the central solenoid L. At this time, the power supply stage of the second capacitor unit C2 starts. After the current transmitted in the central solenoid L reaches the second current value, the power units G12 and G21 can be turned off so that the second capacitor unit C2 stops supplying power to the central solenoid L. At this time, the power supply stage of the second capacitor unit C2 ends. Thereafter, the current in the central solenoid L can be freewheeled through the first freewheeling diode D11, the first capacitor unit C1, and the fourth freewheeling diode D22. This stage is also the above-mentioned freewheeling stage. In some embodiments, the second current value can be equal to the first current value. In this freewheeling stage, the power units G11 and G12 can be alternately turned on.

[0078] Please continue to refer to Figure 4, each power supply module in the drive power supply 10 may further include: a DC power supply U, a first reverse protection diode D1, and a second reverse protection diode D2. In each power supply module, the first reverse protection diode D1 is connected in series with the DC power supply U, and the second reverse protection diode D2 is connected in parallel with the capacitor unit. For example, the positive electrode of the DC power supply U is connected to the positive electrode of the capacitor unit through the first reverse protection diode D1. The positive electrode of the DC power supply U is connected to the input end of the first reverse protection diode D1, the output end of the first reverse protection diode D1 is connected to the positive electrode of the capacitor unit, the positive electrode of the capacitor unit is further connected to the output end of the second reverse protection diode D2, and the negative electrode of the capacitor unit is further connected to the input end of the second reverse protection diode D2. In some embodiments, the DC power supplies U in different power supply modules may also be shared.

[0079] In each power supply module, the DC power supply U is used to charge the capacitor unit, and after the charging is completed, the capacitor unit controls the turning on and off of the power unit to realize the transmission of current from the capacitor unit to the central solenoid L. The first reverse protection diode D1 can prevent the capacitor unit from charging the DC power supply U reversely, and can also prevent the situation that the DC power supply U charges the capacitor unit in the reverse direction. If the circuit connection between the DC power supply U and the capacitor unit is incorrect, the capacitor unit cannot be charged. The second reverse protection diode D2 is used to prevent the circuit from charging the capacitor unit reversely.

[0080] Please continue to refer to Figure 4 , each power supply module in the drive power supply 10 may further include: a relay LB and a discharge resistor R1. In each power supply module, the relay LB and the discharge resistor R1 may be connected in series and are connected in parallel with the capacitor unit. For example, the positive electrode of the capacitor unit is further connected to the first end of the relay LB, the second end of the relay LB is connected to the first end of the discharge resistor R1, and the negative electrode of the capacitor unit is further connected to the second end of the discharge resistor R1. The discharge resistor R1 may be a wire-wound resistor.

[0081] The discharge resistor R1 can be used to discharge the voltage of the capacitor unit in parallel with it. During the process of the capacitor unit supplying power to the load, the relay LB may be in the off state. When the capacitor unit stops supplying power to the load (such as when the voltage on the capacitor unit drops to 0), there may still be some residual electrical energy in the capacitor unit. At this time, the relay LB can be closed to enable the discharge resistor R1 to discharge the residual voltage in the capacitor unit. During the process of the DC power supply charging the capacitor unit, the relay LB may also be in the off state.

[0082] Exemplarily, after turning off the power units G11 and G22, the relay LB in the first power supply module set 101 can be closed to enable the discharge resistor R1 in the first power supply module set 101 to discharge the residual voltage in the first capacitor unit C1. After turning off the power units G12 and G21, the relay LB in the second power supply module set 102 can be closed to enable the discharge resistor R1 in the second power supply module set 102 to discharge the residual voltage in the second capacitor unit C2.

[0083] If the first capacitor unit C1 and the second capacitor unit C2 supply power to the center solenoid L for multiple power supply cycles, then after the end of the multiple power supply cycles, the relay LB in the first power supply module set 101 and the second power supply module set 102 can be closed to discharge the residual voltage in the first capacitor unit C1 and the second capacitor unit C2.

[0084] Please continue to refer to Figure 4 , the drive power supply 10 may further include an auxiliary resistor R4, and the auxiliary resistor R4 is grounded. The second end of the second power unit in each power supply module of the drive power supply 10 is also connected to the auxiliary resistor R4.

[0085] In the embodiments of the present application, the power units (such as the above-mentioned first power unit, second power unit, and third power unit) in the drive power supply 10 can be full-power type devices, and the switching time can be at the microsecond level. Exemplarily, the power unit may include an insulated-gate bipolar transistor (IGBT, insulated-gate bipolar transistor). The first end of the power unit is the collector, and the second end of the power unit is the emitter. In some embodiments, the power unit may also include an integrated gate-commutated thyristor (IGCT, Integrated gate converter thyristor) or a gate turn-off thyristor (GTO, gate turn off thyristor). In these cases, the first end of the power unit is the anode, and the second end of the power unit is the cathode. In the drawings of the embodiments of the present application, the power unit is taken as an IGBT as an example for illustration.

[0086] In one embodiment, the operating current of each power unit can reach 20 kA. Exemplarily, each power unit can be obtained by paralleling multiple power sub-units, and each power sub-unit can be an IGBT, an IGCT, or a GTO. For example, a power unit can be obtained by paralleling 10 IGBTs, and the operating current of each IGBT can reach 2 kA.

[0087] In summary, the drive power supply provided by the embodiment of the present application includes two power supply module sets respectively connected to both ends of the central solenoid. Each power supply module in each power supply module set includes a capacitor unit, a first power unit, and a second power unit connected in sequence, and an auxiliary node between the two power units is connected to the central solenoid. The second ends of each second power unit in any one power supply module set are connected to the second ends of a second power unit in the other power supply module set. The drive power supply can turn on or off each power unit to cause the capacitor unit that transmits current to the central solenoid to switch between the capacitor units in different power supply module sets. The switching of the capacitor unit can reverse the direction of the current transmitted on the central solenoid, and thus alternately transmit positive and negative pulse currents to the central solenoid, ensuring a relatively high change rate of the current transmitted to the central solenoid.

[0088] In the embodiment of the present application, each capacitor unit in the drive power supply 10 can be an energy storage capacitor bank obtained by paralleling a plurality of capacitor branches. Each capacitor branch includes at least one capacitor. In some embodiments, each capacitor branch includes a capacitor and a circuit protection component connected in series. Exemplarily, the circuit protection component can include a fuse, or can also include a fuse and a protection resistor connected in parallel. In some embodiments, the protection resistor is a high-resistance resistor, such as the resistance value of the protection resistor can be greater than or equal to 1 megohm. Each capacitor in the embodiment of the present application can be an aluminum electrolytic capacitor, a film capacitor, or other forms of capacitors. In the embodiment of the present application, the capacitor unit can be a pulse power supply, such as the pulse power that can be released can be as high as 8 megavolt-amperes (MVA). The number of capacitor branches is also relatively large, such as it can reach hundreds.

[0089] Figure 6 is a schematic diagram of a partial circuit structure in a drive power supply for a central solenoid provided by an embodiment of the present application. Figure 6 Taking Figure 1 the shown drive power supply 10 as a basis, the first power supply module set 101 in the drive power supply 10 is taken as an example for illustration. For the second power supply module set 102 and the structures of the power supply module sets in other structures of the drive power supply 10, they can all be the same as or similar to the structure of the first power supply module set 101 shown in Figure 6 and can be correspondingly referred to the introduction for Figure 6 .

[0090] Such as Figure 6As shown, the first capacitor unit C1 in the first power supply module set 101 includes n parallel capacitor branches, where n ≥ 2. There are a total of n capacitors (C11, C12,..., C1n), n fuses (F11, F12,..., F1n), and n protection resistors (R11, R12,..., R1n) in these n capacitor branches. Each capacitor branch includes a capacitor, a fuse, and a protection resistor. For example, capacitor C11, fuse F11, and protection resistor R11 are located in the same capacitor branch. The fuse and the protection resistor in each capacitor branch are in parallel to form a circuit protection component, and this circuit protection component is in series with the resistor in the capacitor branch. For example, this circuit protection component is in series with the positive electrode of the capacitor.

[0091] If the drive power supply only includes the first power supply module, the charging power supply of the first power supply module charges the capacitor unit composed of capacitors C11 to C1n to the required voltage, and then turns on the first power unit G11. The current flows from the positive electrode of the capacitor unit through fuses F11 to F1n, the first power unit, and the load back to the negative electrode of the capacitor unit. When the first power unit is turned off, the current on the load continues to flow through the diode in the second power unit until the current drops to 0.

[0092] In the embodiments of the present application, the positive output terminal of the capacitor in the capacitor unit is connected to the circuit protection component. During the charging and discharging stages of the capacitor unit, the current flows through the fuse and does not pass through the protection resistor. When the charging and discharging current of any capacitor in the capacitor unit exceeds the specified value, the fuse connected to this capacitor will be blown, thereby limiting the input or output current of this capacitor, avoiding the influence of this capacitor on other components in the circuit, avoiding the charging and discharging of the entire capacitor unit caused by a single capacitor short circuit or failure, and avoiding explosion accidents caused by excessive instantaneous current or voltage of a single capacitor. When the circuit protection component also includes a protection resistor, after the fuse is blown, the capacitor is connected in parallel with other capacitors through the protection resistor. The setting of this protection resistor can ensure that after the fuse is blown, the residual voltage on the capacitor can be released through this protection resistor, avoiding the influence on the capacitor itself and the potential safety hazard to maintenance personnel caused by the faulty capacitor. Through this circuit protection component, when a single capacitor in the capacitor unit fails, the overall circuit can be protected, ensuring the safe and stable operation of the nuclear fusion reaction device.

[0093] Please continue to refer to Figure 6 , in some embodiments, the positive electrode of the first capacitor unit C1 is connected to the first end of the first power unit G11 through a fuse F. In this way, when the current or voltage output by the entire first capacitor unit C1 is too large, this fuse F can be disconnected to avoid affecting the load.

[0094] Please continue to refer to Figure 6, in some embodiments, an overvoltage protection component is further connected in parallel to the output terminal of the first capacitor unit C1 to provide passive overvoltage protection for the first capacitor unit C1. The overvoltage protection component may include an overvoltage protection capacitor Cr and an overvoltage protection resistor Rv. During the turn-off phase of the first power unit G11, the stray inductance on the first capacitor unit C1 will generate a high voltage spike, which may cause overvoltage damage to the first capacitor unit C1. The overvoltage protection capacitor Cr can absorb this voltage spike. For example, the overvoltage protection capacitor Cr can be a thin-film capacitor, and the overvoltage protection resistor Rv can be an overvoltage protector.

[0095] In the embodiments of the present application, the voltage and current at various locations in the drive power supply can also be monitored to determine the health status of the capacitor unit, and an early warning can be given when a fault may occur to prevent situations such as the explosion of the capacitor unit. Exemplarily, a voltage acquisition unit can be set to acquire the voltage across the capacitor unit, and a current acquisition unit can be set to acquire the total current flowing through the load, and then based on this voltage and current for analysis to determine the health status of the capacitor unit.

[0096] In some embodiments, the capacitance value of the capacitor unit can be detected during the charging process of the capacitor unit, and by determining whether this capacitance value meets the requirements, it can be determined whether there is a problem with the capacitor unit. In some embodiments, after the capacitor unit discharges, by determining whether the voltage value across the capacitor unit meets the requirements, it can be determined whether there is a problem with the capacitor unit.

[0097] In the embodiments of the present application, the above drive power supply 10 is used to drive the central solenoid L. The drive power supply 10 can also be connected to a control system for the staff to control the drive power supply 10 through this control system, thereby realizing the drive of the central solenoid L. The embodiments of the present application also provide a drive system for the central solenoid. The drive power supply 10 can be the main power part in the drive system for the central solenoid. On the basis of including this drive power supply 10, this drive system further includes a control system 20. The following introduces this control system 20 with reference to the accompanying drawings.

[0098] Figure 7 is a schematic structural diagram of a control system provided by an embodiment of the present application. As Figure 7 shown, the control system 20 can include a host computer and a serial server. The host computer is connected to the serial server, and the serial server is also connected to other functional units. The staff can interact with this host computer to realize the monitoring and control of the drive power supply 10 and each component in the control system 20. The host computer can send control instructions to other functional units through the serial server so that these other functional units can realize corresponding functions. The serial server can also feedback the status information of the functional units it is connected to, as well as the information obtained by the functional units, to the host computer.

[0099] Exemplarily, the serial port server can serve as the controller of the drive power supply 10, and the other functional units connected to the serial port server can be the functional units related to the drive power supply 10. The other functional units can include the drive unit of the power unit. The serial port server is connected to the drive unit of the power unit, and the drive unit of the power unit is also connected to each power unit in the drive power supply 10. For example, the drive unit can be connected to the gates of each power unit. For example, the host computer can send control instructions to the drive unit of the power unit through the serial port server. The drive unit of the power unit can control the corresponding power unit in the drive power supply 10 to turn on or off based on the received control instructions, thereby realizing the working process of the above-mentioned drive power supply 10.

[0100] In some embodiments, the staff can set the turn-on time and turn-on duration of each power unit through the host computer and transmit an instruction carrying the time information to the serial port server. Then, the serial port server can send a turn-on instruction or a turn-off instruction for the corresponding power unit to the drive unit of the power unit at the corresponding time for the drive unit to control the power unit to turn on or off.

[0101] For example, based on the received control instructions, the drive unit of the power unit first controls Figure 4 the power units G3, G11, and G22 in the shown drive power supply to turn on, and after a certain duration, controls the power units G3, G11, and G22 to turn off. Then, it controls the power units G3, G12, and G21 to turn on, and after a certain duration, controls the power units G3, G12, and G21 to turn off.

[0102] Please continue to refer to Figure 7 , the control system 20 can further include a DC power supply control unit. The DC power supply control unit is connected to the serial port server and is also connected to the DC power supply in the drive power supply 10. The host computer can send control instructions to the DC power supply control unit through the serial port server, and the DC power supply control unit controls the DC power supply in the drive power supply 10 to charge the capacitor unit of the drive power supply 10 or turn off the charging of the capacitor unit based on the received control instructions. The DC power supply control unit can also feedback the output state of the DC power supply to the host computer.

[0103] In some embodiments, the staff can set the voltage value and current value that the DC power supply should output through the host computer. The host computer can transmit the voltage value and current value to the DC power supply control unit in advance through the serial port server for the DC power supply control unit to directly send control instructions to the DC power supply based on the values, so that the DC power supply transmits a current that meets the voltage value and current value to the capacitor unit.

[0104] Please continue to refer to Figure 7, the control system 20 may further include a discharge circuit control unit for controlling the discharge circuit in the drive power supply 10. The discharge circuit includes a relay LB and a discharge resistor R1 in the drive power supply 10. The discharge circuit control unit may be connected to the serial server and also connected to the relay LB in the drive power supply 10.

[0105] The host computer may send a control instruction to the discharge circuit control unit through the serial server. The discharge circuit control unit controls the relay to turn on or off based on the received control instruction. The discharge circuit control unit may also feedback the on / off state of the relay to the serial server, and then the serial server may feedback the on / off state to the host computer to realize the monitoring of the component state in the drive power supply 10 by the host computer.

[0106] Please continue to refer to Figure 7 , the control system 20 may further include a monitoring unit and a data acquisition and processing unit. The monitoring unit is connected to the data acquisition and processing unit, and the data acquisition and processing unit is also connected to the host computer. The monitoring unit may monitor voltage data and / or current data in the circuit of the drive power supply 10 and transmit the acquired data to the data acquisition and processing unit. The data acquisition and processing unit may process the received data and transmit the processed data to the host computer for the host computer to monitor the state of the drive power supply 10. In some embodiments, the control system 20 may not include the data acquisition and processing unit, and the host computer directly processes the data acquired by the monitoring unit. In some embodiments, the detection unit may be connected to the host computer through the serial server.

[0107] Exemplarily, the host computer may determine the on-duty ratio of each power unit in the drive power supply 10 based on the data monitored by the monitoring unit, and then may generate a control instruction for each power unit based on the on-duty ratio and send the control instruction to the drive unit of the power unit through the serial server. The drive unit may respond to the control instruction to realize the on and off control of each power unit based on the on-duty ratio. Another example is that the host computer may determine whether there are faults or safety hazards in each capacitor unit in the drive power supply based on the data monitored by the monitoring unit, and then issue a warning when it is determined that a certain capacitor unit may have a safety hazard or a fault. For example, the warning information may be sent to the corresponding display screen of the host computer or to the terminal device of the staff.

[0108] The monitoring unit may include a current sampling unit (i.e., the aforementioned current acquisition unit) and / or a voltage sampling unit (i.e., the aforementioned voltage acquisition unit). Figure 7Taking the monitoring unit including a current sampling unit and a voltage sampling unit as an example for illustration. The current sampling unit is used to collect current data in the circuit of the drive power supply 10, such as the current flowing through the load; the voltage sampling unit is used to collect voltage data in the circuit of the drive power supply 10, such as the voltage across the capacitor unit. The data acquisition and processing unit can collect and record data such as the total output current of the drive power supply 10, the current of each bridge arm branch, and the voltage of the capacitor unit. The bridge arm branch refers to the branch where the power unit is located in the power supply module. The data acquisition and processing unit can also judge whether the current in the circuit reaches the required current value based on the current data, and judge whether the voltage in the circuit reaches the required voltage value based on the voltage data.

[0109] The current sampling unit can be used to detect the current output by each capacitor unit in the drive power supply 10, the current transmitted in the central solenoid L, and the current at each power unit. The voltage sampling unit can be used to detect the voltage across each capacitor unit in the drive power supply 10 and the voltage across the DC power supply.

[0110] In the embodiment of the present application, the convenient and efficient monitoring and remote operation of the drive power supply 10 can be realized through the control system 20, and the remote drive of the central solenoid L can be realized. For example, the staff can use the control system 20 to perform manual or automatic charge and discharge operations on the capacitor unit in the drive power supply 10, and monitor the voltage and current status in the drive power supply 10 in real time, determine the health status of the drive power supply 10, and intervene in time when problems occur in the drive power supply 10.

[0111] Figure 8 It is a flowchart of a driving method for a central solenoid provided by an embodiment of the present application. This method can be applied to the above-mentioned driving system of the central solenoid, and is specifically used to control the drive power supply 10 in the drive system. For example, the drive power supply can be controlled through the control system in the drive system, thereby realizing the drive of the central solenoid. This method can be mutually referred to with the introduction of Figures 1 to 6 the drive power supply 10. Figure 8 The provided method can be executed by the drive unit of the power unit in the control system 20, such as executed by the drive unit based on the control instruction sent by the upper computer through the serial server. As Figure 8 shown, this method can include:

[0112] Step 602, turn on the first power unit group and the third power unit in the drive power supply, so that the capacitor unit in the first power supply module in the drive power supply supplies power to the central solenoid; wherein, the first power unit group includes the first power unit in the first power supply module and the second power unit in the second power supply module.

[0113] In the embodiments of the present application, the first power unit group may include a first power unit and a second power unit that respectively belong to two power supply module sets in the drive power supply. The second power unit is connected to the second power unit in the power supply module to which the first power unit belongs. Here, an example is given where the first power unit group includes the first power unit in the first power supply module and the second power unit in the second power supply module. For the first power supply module and the second power supply module, reference may be made to the previous introduction. During the process of turning on the first power unit group in the drive power supply, other power units belonging to the same power supply module as the power units in the first power unit group are in the off state. In the embodiments of the present application, turning on or off a certain power unit group refers to turning on or off each power unit in the power unit group.

[0114] Such as for reference Figure 1 , the first power supply module may be a power supply module in the first power supply module set 101. The first power unit group may include the first power unit G11 in the first power supply module set 101 and the second power unit G22 in the second power supply module set 102. Turning on the power units G11 and G22 and keeping the power units G12 and G21 in the off state can enable the first capacitor unit C1 to supply power to the central solenoid L. In one embodiment, the first power unit group may also include the second power unit G12 in the first power supply module set 101 and the first power unit G21 in the second power supply module set.

[0115] Step 604, when the current flowing through the central solenoid reaches the first current value, turn off the first power unit group and the third power unit, so that the capacitor unit in the first power supply module stops supplying power to the central solenoid.

[0116] In one embodiment, the host computer in the control system 20 may preset the turn-on duration of the power units in the first power unit group in advance. When the turn-on duration is reached, it is considered that the current flowing through the central solenoid reaches the first current value. The drive unit of the power unit can start timing after triggering the power unit to turn on. When the timing reaches the turn-on duration, the drive unit turns off the power units in the first power unit group.

[0117] In another embodiment, the current flowing through the central solenoid is detected by the current sampling unit in the control system 20. When the data acquisition and processing unit determines that the current reaches the first current value, it feeds back this information to the host computer. After receiving the feedback information, the host computer can send a control instruction to the drive unit of the power unit through the serial port server, so that the drive unit turns off the power units in the first power unit group.

[0118] Step 606: Turn on the second power unit group and the third power unit in the drive power supply, so that the capacitor unit in the second power supply module supplies power to the central solenoid, and the current direction on the central solenoid is reversed; wherein, the second power unit group includes the first power unit in the second power supply module and the second power unit in the first power supply module.

[0119] In the embodiment of the present application, the second power unit group may include another first power unit and another second power unit belonging to two power supply module sets respectively, wherein the second power unit in the power supply module to which the other first power unit belongs is connected to the other second power unit. In one embodiment, the first power unit in the second power unit group may belong to the same power supply module as the second power unit in the first power unit group, and the second power unit in the second power unit group may belong to the same power supply module as the first power unit in the first power unit group. Here, an example is given that the second power unit group includes the first power unit in the second power supply module and the second power unit in the first power supply module. For the first power supply module and the second power supply module, reference may be made to the previous introduction. During the process of turning on the second power unit group, other power units belonging to the same power supply module as the power units in the second power unit group are in the off state.

[0120] Such as please refer to Figure 1 , the second power supply module may be a power supply module in the second power supply module set 102. The second power unit group may include the second power unit G12 in the first power supply module set 101 and the first power unit G21 in the second power supply module set 102. Turning on the units G12 and G21 and keeping the power units G11 and G22 in the off state can enable the second capacitor unit C2 to supply power to the central solenoid L.

[0121] After turning on the second power unit group in the drive power supply, the on-duty ratio of the power units in the second power unit group can be adjusted to adjust the current transmitted from the capacitor unit in the second power supply module to the central solenoid. For example, the power units in the second power unit group can be turned on intermittently to adjust the on-duty ratio of the power units in the second power unit group.

[0122] Step 608: When the current transmitted in the central solenoid reaches the second current value, turn off the second power unit group and the third power unit, so that the capacitor unit in the second power supply module stops supplying power to the central solenoid.

[0123] Step 608 is similar to Step 604, and will not be elaborated here in the embodiment of the present application.

[0124] In summary, in the driving method of the central solenoid provided by the embodiments of the present application, the first power unit group and the second power unit group can be alternately turned on, so that the capacitor units in the first power supply module and the capacitor units in the second power supply module alternately supply power to the central solenoid, and the current direction on the central solenoid is reversed after the capacitor units for power supply are switched. In this way, positive and negative pulse currents can be alternately transmitted to the central solenoid, ensuring a relatively high rate of change of the current transmitted to the central solenoid.

[0125] The embodiments of the present application take Figure 4 the driving power supply 10 shown as an example to further introduce the driving method of the central solenoid. This method can be mutually referred to with the above introduction based on Figures 1 to 6 the introduction of the driving power supply 10 and the introduction of Figure 8 . Figure 9 FIG. is a flowchart of another driving method of the central solenoid provided by an embodiment of the present application. As Figure 9 shown, this method may include:

[0126] Step 702: For each power supply module in the driving power supply, control the relay in the power supply module to disconnect, and control the DC power supply in the power supply module to charge the capacitor unit.

[0127] In the embodiments of the present application, the relay disconnection can be controlled by the discharge circuit control unit in the control system 20, and the DC power supply is controlled by the DC power supply control unit to charge the capacitor unit. For example, the host computer sends a control instruction to the discharge circuit control unit through the serial port server to enable the discharge circuit control unit to execute step 702.

[0128] Step 704: When the voltage on the capacitor unit rises to the target voltage value, control the DC power supply to stop charging the capacitor unit.

[0129] Exemplarily, the target voltage value can be the maximum voltage value that the capacitor unit needs to store, and the target voltage value can be preset. The target voltage values corresponding to different capacitor units in the driving power supply can be the same or different.

[0130] In the embodiments of the present application, the voltage sampling unit can be used to determine whether the voltage on the capacitor unit reaches the target voltage value, and then when the target voltage value is reached, the DC power supply control unit is enabled to control the DC power supply to stop charging the capacitor unit. In one implementation manner, the voltage sampling unit can send the voltage value collected at both ends of the capacitor unit to the host computer through the serial port server, and the host computer determines whether the voltage value reaches the target voltage value, and then issues a control instruction to stop charging the capacitor unit to the DC power supply control unit to trigger the DC power supply control unit to control the DC power supply to stop charging the capacitor unit.

[0131] Step 706: Turn on the third power unit and the first power unit group, and based on the on-duty ratios of the power units in the first power unit group, control the power units in the first power unit group to turn on and off, so that the first capacitor unit supplies power to the central solenoid.

[0132] In the embodiment of the present application, the drive unit of the power unit in the control system 20 can be used to control the third power unit G3 and the power units in the first power unit group to turn on.

[0133] As Figure 4 shown, the first power unit group may include power units G11 and G22. And, the power units in the second power unit group can be kept in the off state, and the second power unit group may include power units G12 and G21. In this way, the first capacitor unit C1 can supply power to the central solenoid L. The current output from the positive electrode of the first capacitor unit C1 can be transmitted to the central solenoid L through the power unit G11 and the third power unit G3. The current output from the central solenoid L then flows through the power unit G22 to the negative electrode of the first capacitor unit C1.

[0134] In some embodiments, the on-duty ratio of the first power unit (such as G11) in the first power unit group is less than 1, and the on-duty ratio of the second power unit (such as G22) in the first power unit group is equal to 1. During the stage when the first capacitor unit C1 supplies power to the central solenoid L, based on the on-duty ratio of the first power unit G11 in the first power supply module, the first power unit G11 and the second power unit G12 in the first power supply module can be controlled to turn on alternately, and the first power unit G21 in the second power supply module can be controlled to remain off continuously, and the second power unit G22 in the second power supply module can be controlled to remain on continuously. The sum of the on-duty ratio of the power unit G11 and the on-duty ratio of the power unit G12 can be equal to 1.

[0135] Step 708: When the current transmitted in the central solenoid reaches the first current value, turn off the third power unit and the first power unit group, so that the first capacitor unit stops supplying power to the central solenoid, and the current transmitted in the central solenoid continues to flow through the freewheeling diode and the current-limiting resistor connected to the second capacitor unit and the second power unit group.

[0136] In the embodiment of the present application, after the first capacitor unit starts to supply power to the central solenoid, the current sampling unit in the control system 20 can determine whether the current transmitted in the central solenoid reaches the first current value. When the first current value is reached, the driving unit of the power unit in the control system 20 can control the third power unit G3 and the power units G11 and G22 in the first power unit group to turn off. In one implementation, the current sampling unit can send the collected current value in the central solenoid to the host computer through the serial server, and the host computer determines whether the current value reaches the first current value, and then issues a control instruction to the driving unit of the power unit to trigger it to control the third power unit G3 and the power units G11 and G22 in the first power unit group to turn off.

[0137] After the third power unit G3 and the power units G11 and G22 are turned off, the central solenoid L can still output current, and at this time, the transmission direction of the current is still the original direction. Therefore, the current output by the central solenoid L can sequentially pass through the third freewheeling diode D21 connected in parallel with the power unit G21, the second capacitor unit C2, the second freewheeling diode D12 connected in parallel with the power unit G12, and the current limiting resistor R3 to realize freewheeling. During this freewheeling stage, the first power unit G21 and the second power unit G22 in the second power supply module can be alternately turned on.

[0138] Step 710: Turn on the third power unit and the second power unit group at a specified moment, and based on the on-duty ratio of each power unit in the second power unit group, control the power units in the second power unit group to turn on and off, so that the second capacitor unit supplies power to the central solenoid.

[0139] In the embodiment of the present application, the driving unit of the power unit in the control system 20 can be used to control the third power unit G3 and the power units G12 and G21 in the second power unit group to turn on.

[0140] During the freewheeling process, the current can continue to be transmitted for a period of time. In the embodiment of the present application, the specified moment can be determined according to the breakdown condition of the gas in the nuclear fusion reaction chamber caused by the current during the freewheeling process and the required holding time of the generated plasma. The specified moment can be the moment when the current during the freewheeling process is about to drop to 0. For example, if the freewheeling can be maintained for 10 milliseconds after the first capacitor unit C1 stops supplying power, then the third power unit and the first power unit group can be turned on again 10 milliseconds after they are turned off, so that the second capacitor unit C2 starts to supply power.

[0141] In some embodiments, the on-duty cycle of the first power unit (such as G21) in the second power unit group is less than 1, and the on-duty cycle of the second power unit (such as G12) is equal to 1. During the stage when the second capacitor unit C2 powers the central solenoid L, based on the on-duty cycle of the first power unit G21 in the second power supply module, the first power unit G21 and the second power unit G22 in the second power supply module can be controlled to alternately turn on, and the first power unit G11 in the first power supply module can be controlled to continuously turn off and the second power unit G12 to continuously turn on. The sum of the on-duty cycle of the power unit G21 and the on-duty cycle of the power unit G22 can be equal to 1.

[0142] Step 712: When the current transmitted in the central solenoid reaches the second current value, turn off the third power unit and the second power unit group, so that the second capacitor unit stops powering the central solenoid, and the current transmitted in the central solenoid continues to flow through the first capacitor unit, the freewheeling diode connected to the first power unit group, and the auxiliary diode.

[0143] In the embodiments of the present application, when the second capacitor unit starts to power the central solenoid, the current sampling unit in the control system 20 can be used to determine whether the current transmitted in the central solenoid reaches the second current value. When the second current value is reached, the driving unit of the power unit in the control system 20 can control the third power unit G3 and the power units G12 and G21 in the second power unit group to turn off. This current value can also be judged by the host computer, and specific reference can be made to the relevant introduction in the foregoing step 708.

[0144] After the third power unit G3 and the power units G12 and G21 are turned off, the central solenoid L can still output current, and at this time, the transmission direction of the current is still the original direction. Therefore, the current output by the central solenoid L can sequentially pass through the auxiliary diode D3 connected in parallel with the third power unit G3, the first freewheeling diode D11 connected in parallel with the power unit G11, the first capacitor unit C1, and the fourth freewheeling diode D22 connected in parallel with the power unit G22 for freewheeling. This freewheeling stage can continue until the current on the central solenoid L drops to 0 A. During this freewheeling stage, the first power unit G11 and the second power unit G12 in the first power supply module can be alternately turned on.

[0145] In some embodiments, the third power unit G3 may not be turned on in step 710, and correspondingly, the third power unit G3 may not be turned off in step 712. Since the direction of the current changes during the power supply process of the second capacitor unit C2, even if the third power unit G3 is not turned on, the current transmitted by the second capacitor unit C2 will be normally transmitted through the auxiliary diode D3.

[0146] The above steps 706 to 712 are the control process of the driving power supply 10 in one power supply cycle of the central solenoid L. After step 712, steps 706 to 712 may be repeatedly performed to repeatedly power the central solenoid L. After at least one power supply cycle ends, step 714 may be performed.

[0147] Step 714: When the current on the central solenoid drops to the auxiliary current value, the relay in the driving power supply is turned on to discharge the voltage on the capacitor unit.

[0148] The auxiliary current value may be 0 A. A current sampling unit in the control system 20 may be used to detect whether the current on the central solenoid drops to the auxiliary current value.

[0149] In the embodiment of the present application, the relays in one or more power supply modules in the driving power supply can be turned on to discharge the voltage on the capacitor unit in the corresponding power supply module through the discharge circuit control unit in the control system 20. For example, the relay in the first power supply module can be turned on to discharge the voltage on the first capacitor unit C1; the relay in the second power supply module can be turned on to discharge the voltage on the second capacitor unit C2.

[0150] Figure 10 is a simplified working flow chart of a driving system of a central solenoid provided in one embodiment of the present application, and the driving system includes Figure 4 The driving power supply 10 shown in the figure is taken as an example. Figure 10 As shown, after the drive system is powered on, each device in the drive system can be initialized, and each device includes the above-mentioned host computer, serial port server, data acquisition processing unit, current sampling unit, drive unit of the power unit, voltage sampling unit, DC power supply control unit and discharge circuit control unit.

[0151] Afterwards, the discharge parameters required for powering the central solenoid can be set in the host computer. For example, the discharge parameters may include the triggering opening moment of each power unit in the driving power supply and the duration of maintaining the opening state, and may also include the output voltage value and current value of the DC power supply. Then, the DC power supply control unit may output a charging instruction to the DC power supply to charge the first capacitor unit C1 and the second capacitor unit C2 based on the set target voltage value. When the voltage value of the first capacitor unit C1 and the second capacitor unit C2 is consistent with the target voltage value, stop charging the capacitor unit.

[0152] Then, the driving unit of the power unit can output a trigger instruction to each power unit so that each power unit is turned on and off according to the set time. For example, first trigger the power units G11, G22 and G3 to turn on, and then trigger the power units G11, G22 and G3 to turn off at a specified time; then trigger the power units G12, G21 and G3 to turn on, and then trigger the power units G12, G21 and G3 to turn off at a specified time. After the power supply of at least one power supply cycle of the central solenoid L is realized in this way, the discharge circuit in the driving power supply 10 can be opened by the discharge circuit control unit to discharge the residual voltage of the first capacitor unit C1 and the second capacitor unit C2.

[0153] In the embodiment of the present application, when the capacitor unit in the driving power supply is formed by connecting a plurality of capacitor branches in parallel, and a fuse is provided on each capacitor branch, the above Figure 9 and Figure 10 The driving method of the central solenoid shown may further include a step of monitoring the state of the capacitor unit.

[0154] In one embodiment, the DC power supply in any power supply module included in the driving power supply can be used to charge the corresponding capacitor unit to determine whether the capacitance of the capacitor unit meets the requirements (such as during the execution of the above step 702). During the charging and discharging process of the capacitor unit, if the fuse of any capacitor is disconnected, the capacitor will exit the charging and discharging circuit, and the capacity of the capacitor unit will decrease. When the capacity of the capacitor unit is reduced to a certain value, the normal drive of the load (such as the central solenoid) cannot be achieved, and maintenance is required at this time. In the embodiment of the present application, the capacitance of the capacitor unit can be determined based on the voltage across the capacitor unit at each moment during the charging process; after the charging of the capacitor unit is completed, when it is determined that the capacitance of the capacitor unit is lower than the capacitance threshold, a warning message for the capacitor unit is issued.

[0155] For example, before the DC power supply discharges to the corresponding capacitor unit each time, the host computer presets the charging voltage and current for the DC power supply so that the DC power supply uses a constant current I to charge the capacitor unit. During the charging process, the voltage acquisition unit can detect the voltage across the capacitor unit once at a certain interval Δti, and the host computer can determine the capacitance of the capacitor unit after charging based on the current I and the n voltage values ​​detected during the charging process. For example, the host computer can determine the voltage difference Δvi between each two adjacent moments based on the voltage values ​​received at each moment, 1≤i≤n. Based on the formula Determine the capacitance value Ci at each moment, obtain n capacitance values, and then calculate the mean of these n capacitance values Obtain the capacitance value of the capacitor unit after charging. The voltage acquisition unit can directly upload the detected voltage value to the host computer each time, and the host computer calculates the capacitance value at that moment after receiving the voltage. In this way, n capacitance values are obtained after charging ends, and then the average value can be directly calculated. In some embodiments, the time interval between every two adjacent detected voltages is equal.

[0156] After that, the host computer can compare the average value C with a preset capacitance threshold. If the average value is lower than the capacitance threshold, the host computer issues a warning to indicate whether components such as the fuse and capacitor in the capacitor unit are normal for the staff to check. Exemplarily, the capacitance threshold can be 80%, 85% or other ratios of the capacitance value when the capacitor unit is normal.

[0157] After determining that the capacitor unit meets the requirements based on the voltage value detected during the charging process, the capacitor unit is then put into actual use, that is, the capacitor unit supplies power to the load. Correspondingly, in steps 602 and 706 above, the steps of turning on the first power unit group and the third power unit in the drive power supply include: turning on the first power unit group and the third power unit in the drive power supply when the charging of the capacitor unit in the drive power supply is completed and it is determined that the capacitance value of the capacitor unit is greater than or equal to the capacitance threshold.

[0158] In one embodiment, it is possible to determine whether the capacitance value of the capacitor unit meets the requirements after the capacitor unit has completed power supply to the load. When the capacitor unit is normal, the voltage across its two ends should quickly drop to a lower value, such as below the second voltage threshold, after the power supply to the load is completed. If the voltage across the two ends of the capacitor unit is still large after the power supply, it can be considered that there may be certain problems with the capacitor unit. In the embodiments of the present application, the health state of the capacitor unit can be judged based on this.

[0159] Correspondingly, after turning off the first power unit group and the third power unit in step 604 or step 706, the driving method for the central solenoid can further include: sending a warning message for the capacitor unit in the first power supply module when the voltage across the two ends of the capacitor unit in the first power supply module is greater than the voltage threshold. After turning off the second power unit group and the third power unit in step 608 or step 710, the driving method can further include: sending a warning message for the capacitor unit in the second power supply module when the voltage across the two ends of the capacitor unit in the second power supply module is greater than the voltage threshold.

[0160] After turning off the first power unit group and the third power unit, the voltage acquisition unit can acquire the voltage across the capacitor unit in the first power supply module and send the acquired voltage value to the host computer. The host computer can determine whether the voltage value is greater than the voltage threshold. If it is greater than the voltage threshold, a warning message is issued to trigger the staff to repair the capacitor unit. Similarly, after turning off the second power unit group and the third power unit, the voltage acquisition unit can acquire the voltage across the capacitor unit in the second power supply module and send the acquired voltage value to the host computer, and the host computer determines whether the voltage value meets the requirements.

[0161] In the embodiment of the present application, during a single overall driving process of the central solenoid, the driving power supply needs to perform multiple pulsed discharges to the load. During this multiple pulsed discharge process, it is necessary to perform multiple processes of starting and ending the discharge of the capacitor unit in each power supply module. After each discharge ends, the voltage value can be detected to determine whether the capacitor unit fails at this time. For different discharge processes, the corresponding voltage thresholds may be different. For example, the voltage threshold corresponding to the later discharge process decreases.

[0162] In the embodiment of the present application, the health status of the capacitor unit can be actively monitored, early warnings can be given for possible problems, and explosions can be prevented. Moreover, a single capacitor in the capacitor unit is protected by a circuit protection component, ensuring that any number of capacitors can be connected in parallel in the capacitor unit, and avoiding the impact on the overall capacitor unit or circuit caused by the failure of a single capacitor.

[0163] In summary, in the driving method of the central solenoid provided by the embodiment of the present application, the first power unit group and the second power unit group can be alternately turned on, so that the capacitor units in the first power supply module and the second power supply module alternately supply power to the central solenoid, and the current direction on the central solenoid is reversed after the capacitor units for power supply are switched. In this way, it is possible to alternately transmit positive and negative pulsed currents to the central solenoid, ensuring a relatively high rate of change of the current transmitted to the central solenoid.

[0164] The embodiment of the present application also provides a fusion reaction system, which may include: a nuclear fusion reaction device and the driving system of the above-mentioned central solenoid. The driving power supply in the driving system can be connected to the central solenoid of the nuclear fusion reaction device for transmitting pulsed current to the central solenoid. The central solenoid in the nuclear fusion reaction device is used to generate a magnetic field based on the pulsed current and use the magnetic field to generate an initial plasma ring, and the plasma in the initial plasma ring is used to be heated to the fusion reaction temperature to undergo a fusion reaction.

[0165] Since the rate of change of the pulsed current transmitted by the drive power supply to the central solenoid is relatively high, it can better meet the working requirements of the central solenoid, ensure that the central solenoid generates a relatively stable magnetic field, and then generate a plasma current with better stability, improving the stability of the nuclear fusion reaction. Moreover, since the control system in the drive system can be used to achieve flexible and efficient control of the drive power supply, the driving process of the central solenoid can be simplified, and accordingly, the process of the nuclear fusion reaction device for carrying out the nuclear fusion reaction can be simplified.

[0166] The above describes specific embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve the desired result. Additionally, the processes depicted in the figures do not necessarily require the particular order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0167] Those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present application. In the above embodiments, each embodiment is described with its own emphasis. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0168] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The alternative embodiments do not elaborate on all the details and do not limit the present application to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of the present application. The present application selects and specifically describes these embodiments to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application.

Claims

1. A driving power supply for a central solenoid, characterized in that: The driving power supply includes: two power supply module sets, each of which includes at least one power supply module; each power supply module includes a capacitor unit, a first power unit, and a second power unit; the positive electrode of the capacitor unit is connected to the first end of the first power unit, the second end of the first power unit and the first end of the second power unit are both connected to the auxiliary node, and the second end of the second power unit is connected to the negative electrode of the capacitor unit; the second end of the second power unit in any power supply module of any power supply module set is connected to the second end of the second power unit in a power supply module of another power supply module set; The driving power supply further includes a current limiting resistor, a third power unit and an auxiliary diode; the two power supply module sets, an auxiliary node in one power supply module set is connected to the first end of the current limiting resistor, the first end of the third power unit and the output end of the auxiliary diode, the second end of the current limiting resistor, the second end of the third power unit and the input end of the auxiliary diode are connected to one end of the central solenoid, and the auxiliary node in the other power supply module set is connected to the other end of the central solenoid; Each power unit is controlled to be turned on or off so that the capacitor unit transmitting current to the central solenoid switches between the capacitor unit in the first power supply module and the capacitor unit in the second power supply module; wherein the first power supply module and the second power supply module belong to different power supply module sets respectively.

2. The driving power supply according to claim 1, characterized in that: Each of the power supply module sets includes a plurality of power supply modules; The second ends of the second power units in the two power supply modules are connected; Alternatively, among the two power supply module sets, the second end of each second power unit in one power supply module set is connected one-to-one with the second end of each second power unit in the other power supply module set; the second end of the second power unit in the first power supply module is connected with the second end of the second power unit in the second power supply module.

3. The driving power supply according to claim 1, characterized in that: In a target phase in which the capacitor unit of the first power supply module transmits current to the central solenoid, the first power unit in the first power supply module is controlled to be turned on and the second power unit is controlled to be turned off, and the first power unit in the second power supply module is controlled to be turned off and the second power unit is controlled to be turned on; In the target stage, the on-duty cycle of the first power unit in the first power supply module is less than 1, and the on-duty cycle of the second power unit in the second power supply module is equal to 1, wherein the on-duty cycle is obtained based on the target voltage corresponding to the central solenoid and the output voltage of the capacitor unit in the first power supply module.

4. The driving power supply according to claim 3, characterized in that: In the target phase, the first power unit and the second power unit in the first power supply module are controlled to be turned on alternately, and the first power unit in the second power supply module is controlled to be turned off continuously and the second power unit is controlled to be turned on continuously.

5. The driving power supply according to claim 3 or 4, characterized in that: After the target stage, the first power unit and the second power unit in the first power supply module are both controlled to be turned off, and the first power unit and the second power unit in the second power supply module are controlled to be turned on alternately.

6. The driving power supply according to any one of claims 1 to 4, characterized in that: The driving power source meets at least one of the following conditions: Each power supply module further includes: two freewheeling diodes; for each of the first power unit and the second power unit, the first end of the power unit is further connected to the output end of a freewheeling diode, and the second end of the power unit is further connected to the input end of the freewheeling diode; Each power supply module further includes: a DC power supply, a first anti-reverse diode and a second anti-reverse diode; in each power supply module, the positive electrode of the DC power supply is connected to the positive electrode of the capacitor unit through the first anti-reverse diode, the positive electrode of the DC power supply is connected to the input end of the first anti-reverse diode, the output end of the first anti-reverse diode is connected to the positive electrode of the capacitor unit, the positive electrode of the capacitor unit is also connected to the output end of the second anti-reverse diode, and the negative electrode of the capacitor unit is also connected to the input end of the second anti-reverse diode; Each power supply module further includes: a relay and a discharge resistor; in each power supply module, the positive electrode of the capacitor unit is also connected to the first end of the relay, the second end of the relay is connected to the first end of the discharge resistor, and the negative electrode of the capacitor unit is also connected to the second end of the discharge resistor; Furthermore, each power unit in the driving power supply includes an insulated gate bipolar transistor IGBT, the first end of each power unit is the collector, and the second end of each power unit is the emitter; or, each power unit includes an integrated gate-commutated thyristor IGCT or a gate turn-off thyristor GTO, the first end of each power unit is the anode, and the second end of each power unit is the cathode.

7. The driving power supply according to any one of claims 1 to 4, characterized in that: The capacitor unit includes a plurality of capacitor branches connected in parallel, and the capacitor branches include capacitors and circuit protection components connected in series; the circuit protection component includes a fuse, or includes a fuse and a protection resistor connected in parallel; And / or, the positive electrode of the capacitor unit is connected to the first end of the first power unit through a fuse; And / or, an overvoltage protection component is connected in parallel to the output end of the capacitor unit.

8. A central solenoid drive system, characterized in that: The driving system comprises: a host computer, a serial port server, a driving unit of a power unit, and a driving power supply according to any one of claims 1 to 7; The host computer is used to send a control instruction to the drive unit of the power unit through the serial port server; The driving unit of the power unit is used to control the power unit in the driving power supply to turn on or off based on the received control instruction.

9. The drive system according to claim 8, characterized in that: The driving power supply further includes a DC power supply, and the DC power supply is connected to a capacitor unit in the driving power supply; the driving system further includes: a DC power supply control unit; The host computer is also used to send control instructions to the DC power supply control unit through the serial port server; The DC power supply control unit is used to: control the DC power supply in the driving power supply based on the received control instruction to charge the capacitor unit or disconnect the charging of the capacitor unit; and / or, Each power supply module in the driving power supply further includes a relay and a discharge resistor, and the driving system further includes a discharge circuit control unit; The host computer is also used to send a control instruction to the discharge circuit control unit through the serial port server; The discharge circuit control unit is used to control the relay to be turned on or off based on the received control instruction, and to feed back the on / off state of the relay to the serial port server.

10. The drive system according to claim 8, characterized in that: The driving system also includes: a monitoring unit and a data acquisition and processing unit; The monitoring unit is used to monitor the voltage data and / or current data in the circuit of the driving power supply, and transmit the monitored data to the data acquisition and processing unit; The data acquisition and processing unit is used to process the received data and transmit the processed data to the host computer; The host computer is also used to determine the on-duty ratio of each power unit in the driving power supply based on the processed data, and generate the control instruction based on the on-duty ratio.

11. A method for driving a central solenoid, characterized in that: Applied to the drive system according to any one of claims 8 to 10, the method comprises: Turning on the first power unit group and the third power unit in the driving power supply included in the driving system, so that the capacitor unit in the first power supply module in the driving power supply supplies power to the central solenoid; wherein the first power unit group includes the first power unit in the first power supply module and the second power unit in the second power supply module; When the current transmitted in the central solenoid reaches a first current value, the first power unit group and the third power unit are turned off, so that the capacitor unit in the first power supply module stops supplying power to the central solenoid; Turning on the second power unit group and the third power unit in the driving power supply, so that the capacitor unit in the second power supply module supplies power to the central solenoid, and the current direction on the central solenoid is reversed; wherein the second power unit group includes the first power unit in the second power supply module and the second power unit in the first power supply module; When the current transmitted in the central solenoid reaches a second current value, the second power unit group and the third power unit are turned off, so that the capacitor unit in the second power supply module stops supplying power to the central solenoid.

12. The method according to claim 11, characterized in that The step of turning on the first power unit group and the third power unit in the driving power supply included in the driving system so that the capacitor unit in the first power supply module in the driving power supply supplies power to the central solenoid includes: Turning on a first power unit group and a third power unit in a driving power supply included in the driving system, and based on the turn-on duty ratio of each power unit in the first power unit group, controlling the turn-on and turn-off of the power units in the first power unit group, so that the capacitor unit in the first power supply module in the driving power supply supplies power to the central solenoid; wherein the turn-on duty ratio of the first power unit in the first power unit group is less than 1, and the turn-on duty ratio of the second power unit is equal to 1; The step of turning on the second power unit group and the third power unit in the driving power supply so that the capacitor unit in the second power supply module in the driving power supply supplies power to the central solenoid includes: The second power unit group and the third power unit in the driving power supply are turned on, and based on the on-duty cycle of each power unit in the second power unit group, the power units in the second power unit group are controlled to be turned on and off, so that the capacitor unit in the second power supply module in the driving power supply supplies power to the central solenoid; wherein the on-duty cycle of the first power unit in the second power unit group is less than 1, and the on-duty cycle of the second power unit is equal to 1.

13. The method according to claim 12, characterized in that The controlling the power units in the first power unit group to be turned on and off based on the on duty ratio of each power unit in the first power unit group includes: Based on the on-duty cycle of the first power unit in the first power supply module, control the first power unit and the second power unit in the first power supply module to be turned on alternately, and control the first power unit in the second power supply module to be continuously turned off and the second power unit to be continuously turned on; The controlling the power units in the second power unit group to be turned on and off based on the on duty ratio of each power unit in the second power unit group includes: Based on the on-duty cycle of the first power unit in the second power supply module, the first power unit and the second power unit in the second power supply module are controlled to be turned on alternately, and the first power unit in the first power supply module is controlled to be continuously turned off and the second power unit is continuously turned on.

14. The method according to any one of claims 11 to 13, characterized in that: The method further comprises: After the first power unit group and the third power unit are turned off so that the capacitor unit in the first power supply module stops supplying power to the central solenoid, the first power unit and the second power unit in the second power supply module are controlled to be turned on alternately; After shutting down the second power unit group and the third power unit so that the capacitor unit in the second power supply module stops supplying power to the central solenoid, the first power unit and the second power unit in the first power supply module are controlled to be turned on alternately.

15. The method according to any one of claims 11 to 13, characterized in that: The step of turning on the first power unit group and the third power unit in the driving power supply included in the driving system includes: Firstly, a third power unit in a driving power supply included in the driving system is turned on, and then a first power unit group in the driving power supply is turned on; The step of turning on the second power unit group and the third power unit in the driving power supply includes: The third power unit is turned on first, and then the second power unit group in the driving power supply is turned on.

16. The method according to any one of claims 11 to 13, characterized in that: Each power supply module in the driving power supply further includes: a DC power supply connected in parallel with the capacitor unit, two freewheeling diodes connected in parallel with the first power unit and the second power unit respectively, and a relay and a discharge resistor connected in parallel with the capacitor unit after being connected in series; the method further includes: Before turning on the first power unit group and the third power unit in the driving power supply included in the driving system, for each power supply module, disconnecting the relay, and controlling the DC power supply in the power supply module to charge the capacitor unit to a target voltage value; After turning off the first power unit group and the third power unit, turning on the relay in the first power supply module to discharge the voltage on the capacitor unit in the first power supply module; wherein the current transmitted in the central solenoid is freewheeled through the capacitor unit in the second power supply module, the freewheeling diode connected to the second power unit group and the current limiting resistor; After turning off the second power unit group and the third power unit, the relay in the second power supply module is turned on to discharge the voltage on the capacitor unit in the second power supply module; wherein the current transmitted in the central solenoid is freewheeled through the auxiliary diode, the capacitor unit in the first power supply module and the freewheeling diode connected to the first power unit group.

17. The method according to any one of claims 11 to 13, characterized in that: Each power supply module in the driving power supply further includes: a DC power supply connected in parallel with a capacitor unit, wherein the capacitor unit includes a plurality of capacitor branches connected in parallel, and the capacitor branches include capacitors and circuit protection components connected in series; the method further includes: In a process in which the DC power supply in any power supply module charges the capacitor unit, the capacitance of the capacitor unit is determined based on the voltage across the capacitor unit at each moment in the charging process; After the capacitor unit is fully charged, if it is determined that the capacitance of the capacitor unit is lower than a capacitance threshold, a warning message for the capacitor unit is issued.

18. The method according to claim 17, characterized in that The step of turning on the first power unit group and the third power unit in the driving power supply included in the driving system includes: When the capacitor unit in the driving power supply is fully charged and it is determined that the capacitance of the capacitor unit is greater than or equal to the capacitance threshold, the first power unit group and the third power unit in the driving power supply are turned on.

19. The method according to any one of claims 11 to 13, characterized in that: After shutting down the first power unit group and the third power unit, the method further includes: When the voltage across the capacitor unit in the first power supply module is greater than a voltage threshold, issuing a warning message for the capacitor unit in the first power supply module; After shutting down the second power unit group and the third power unit, the method further includes: When the voltage across the capacitor unit in the second power supply module is greater than the voltage threshold, a warning message for the capacitor unit in the second power supply module is issued.

20. A fusion reaction system, characterized in that: The fusion reaction system comprises: a nuclear fusion reaction device and a driving system according to any one of claims 8 to 10; The driving power supply in the driving system is connected to the central solenoid of the nuclear fusion reaction device, and is used to transmit pulse current to the central solenoid; The central solenoid is used to generate a magnetic field based on the pulse current, and use the magnetic field to generate an initial plasma ring. The plasma in the initial plasma ring is used to be heated to a fusion reaction temperature to generate a fusion reaction.

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