Energy consumption type pulse special power supply topology circuit

Abstract

The invention discloses an energy consumption type pulse special power supply topology circuit, particularly relates to the technical field of power supply circuits, and is technically characterized in that a forward energy storage unit is used for outputting forward current to an external load coil and providing energy required by main compression for a field inversion configuration device; the negative energy storage unit is used for outputting negative current to an external load coil and providing bias field energy for the field inversion configuration device; the charging unit is also used for charging the current source unit; the current source unit is used for providing bias current for an external load coil and creating a bias condition for the field inversion configuration device; the resonance unit is used for outputting resonance current to an external load coil and providing energy required by pre-ionization for the field inversion configuration device; the first consumption unit is used for consuming residual electric energy after the external load coil and the current source unit work; the first control unit is used for controlling short circuit of the first consumption unit; the second control unit is used for controlling the on-off of the resonance unit; and the third control unit is used for controlling the on-off of the negative energy storage unit.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply circuits, and in particular to an energy-consuming pulse special power supply topology circuit. Background Art

[0002] The field inversion device is a type of magnetic inertial confinement fusion device. The working process of the device using angular pinch field inversion is usually as follows: first, the fuel gas is filled into the chamber, and the bias capacitor discharges to generate a reverse initial bias magnetic field in the chamber; secondly, the pre-ionization capacitor discharges to ionize the fuel gas in the bias magnetic field to generate initial plasma; thirdly, the main capacitor discharges, the current of the external poloidal field coil is rapidly reversed, and the reverse magnetic field drives the radial implosion of the plasma in the chamber; then, after the reverse magnetic field reaches its maximum value, a crowbar switch is used to isolate the capacitor and the poloidal field coil, and the coil current gradually decays under the action of damping, and magnetic reconnection occurs at both ends of the plasma to form a closed magnetic surface, forming an initial field inversion; finally, the field inversion shrinks axially under the action of the magnetic tension generated by the curvature of the magnetic field at both ends, and finally the plasma achieves axial and radial force balance and reaches a stable state; and the high-voltage power supply is used to provide working current for the θ-pinch coil; Conventional field inversion device high voltage power supply topology such as Figure 1 In the topology, L3 is the line inductance, L1 is the external load coil, and the power supply is divided into four branches, which are generated by timing coordination. Figure 2 The θ pinch coil current shown; the existing power supply working process is divided into four steps. In the first step, H1 is turned on, L2 and C3 provide bias field current, and the power supply works in the Bias stage; in the second step, H2 is turned on, C1 provides resonant current to pre-ionize the fuel gas, and the power supply works in the PI stage; in the third step, H3 is turned on, C2 provides the main compression current to quickly reverse the magnetic field, and the power supply works in the Main stage; in the fourth step, H4 is turned on, the current slowly decreases, and the Crowbar is turned on.

[0003] Therefore, the traditional topology has the following disadvantages: (1) In the current topology, H1, H2, H3, and H4 are all hydrogen thyristors. The advantage of hydrogen thyristors is that the voltage and current of a single tube are high, and they are suitable for narrow pulse applications. The disadvantage is that the control is complex, the control power is large, and the hydrogen thyristor is susceptible to electromagnetic interference and environmental influences. (2) When modeling the field inversion theory, the deflection magnetic field uses a constant; in actual applications, the deflection magnetic field should change slowly or remain unchanged to avoid affecting the fuel gas. However, the bias field current generation principle of the traditional topology is that L2, L1 and C3 resonate to produce a sine wave, and the rising slope of the sine wave will affect the gas state; (3) The time when the pre-ionization circuit is put into operation is 1 / 4 of the sine wave period of the deflection magnetic field. Once the half-wave of the sine wave is missed, or the beginning of the negative half-wave is missed, the pre-ionization branch cannot generate a stable oscillation waveform after being put into operation; Therefore, the present invention aims to provide an energy-consuming pulse special power supply topology circuit to solve the above-mentioned related problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing high-voltage power supply topology often causes an unstable deflection magnetic field when providing current to the θ-pinch coil of a field inversion device. The purpose is to provide an energy-consuming pulse special power supply topology circuit. A positive energy storage unit and a negative energy storage unit are used to output positive or negative current to an external load coil, providing the field inversion device with the energy required for the main compression stage and the bias field stage. Two dissipation resistors are used to dissipate residual energy in the external load coil and the current source unit after power supply is terminated, thereby preventing damage to the device. A current source receives electrical energy to provide a bias current to the external load coil, thereby creating a bias condition. A resonant current is output through a resonant unit, which combines with the bias current in the external load coil to form a biased resonant current, thereby providing the energy required for pre-ionization of the field inversion device. A first control unit controls the short-circuiting of the first dissipation unit, while a second control unit controls the on / off switching of the resonant unit. A third control unit and a fourth control unit control the on / off switching of the positive and negative energy storage units. Furthermore, a current source unit is used to control the rise time of the bias field.

[0005] The present invention is achieved through the following technical solutions: An energy-consuming pulse special power supply topology circuit, the circuit comprising: The forward energy storage unit is used to output a forward current to the external load coil, providing the energy required for the main compression of the field inversion device; The negative energy storage unit is used to output a negative current to the external load coil to provide bias field energy for the field inversion device; it is also used to charge the current source unit; A current source unit is used to receive and store electrical energy and provide a bias current to an external load coil to create a bias condition for a field inversion device; The resonance unit is used to output a resonance current to an external load coil to provide the field inversion device with the energy required for pre-ionization; A first consumption unit is used to consume residual electric energy after the external load coil and the current source unit work; a first control unit, configured to control the first consumption unit to short-circuit; A second control unit, used to control the on and off of the resonant unit; A third control unit is used to control the on and off of the negative energy storage unit; The fourth control unit is used to control the on and off of the forward energy storage unit.

[0006] Furthermore, the first connection end of the first consumption unit is connected to the first external port, the second connection end of the first consumption unit is connected to the first connection end of the current source unit, the second connection end of the current source unit is connected to the first connection end of the third control unit, the second connection end of the third control unit is connected to the first connection end of the negative energy storage unit, and the second connection end of the negative energy storage unit is connected to the second external port; The first connection end of the forward energy storage unit is connected to the second external port, the second connection end of the forward energy storage unit is connected to the first connection end of the fourth control unit, and the second connection end of the fourth control unit is connected to the first external port; The first connection end of the first control unit is connected to the first connection end of the first consumable unit, and the second connection end of the first control unit is connected to the second connection end of the first consumable unit; A first connection end of the second control unit is connected to the first connection end of the current source unit, a second connection end of the second control unit is connected to the first connection end of the resonance unit, and a second connection end of the resonance unit is connected to the second connection end of the current source unit; The second output end of the current source unit is also connected to the second external port, and a first unidirectional control unit is connected between the current source unit and the second external port; the second external port is also connected to the first connection end of the fourth control unit, and a second unidirectional control unit is connected between the second external port and the fourth control unit.

[0007] Furthermore, the first external port is connected to the first connection end of the current source unit, the second connection end of the current source unit is connected to the first connection end of the first consumption unit, the second connection end of the first consumption unit is connected to the first connection end of the third control unit, the second connection end of the third control unit is connected to the first connection end of the negative energy storage unit, and the second connection end of the negative energy storage unit is connected to the second external port; The first connection end of the forward energy storage unit is connected to the second external port, the second connection end of the forward energy storage unit is connected to the first connection end of the fourth control unit, and the second connection end of the fourth control unit is connected to the first external port; The first connection end of the first control unit is connected to the first connection end of the first consumable unit, and the second connection end of the first control unit is connected to the second connection end of the first consumable unit; A first connection terminal of the second control unit is connected to the first connection terminal of the current source unit, a second connection terminal of the second control unit is connected to the first connection terminal of the resonance unit, and a second connection terminal of the resonance unit is connected to the second connection terminal of the first consumption unit; The second output end of the first consumer unit is also connected to the second external port, and a first unidirectional control unit is connected between the first consumer unit and the second external port; the second external port is also connected to the first connection end of the fourth control unit, and a second unidirectional control unit is connected between the second external port and the fourth control unit.

[0008] Furthermore, a second consumption unit is connected between the second external port and the second unidirectional control unit.

[0009] Furthermore, both the first consumption unit and the second consumption unit adopt consumption resistors.

[0010] Furthermore, the first unidirectional control unit and the second unidirectional control unit both use freewheeling diodes.

[0011] Furthermore, the first control unit, the second control unit and the third control unit each include an IGBT component and a freewheeling diode connected in reverse parallel to the IGBT component.

[0012] Furthermore, the fourth control unit adopts a pulse thyristor.

[0013] Furthermore, the current source unit adopts an energy storage inductor.

[0014] Furthermore, the positive energy storage unit adopts a positive energy storage capacitor, and the negative energy storage unit adopts a negative energy storage capacitor.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: In the present invention, an energy-consuming pulse special power supply topology circuit is provided, which outputs positive or negative current to the external load coil through a positive energy storage unit and a negative energy storage unit to provide the field inversion device with the energy required for the main compression stage and the bias field stage; at the same time, the residual electric energy of the external load coil and the current source unit is consumed by two consumption resistors after the power supply is completed, thereby avoiding damage to the device; the bias current is provided to the external load coil by receiving electric energy through the current source to create a bias condition; the resonant current is output through the resonance unit, which is combined with the bias current on the external load coil to form a biased resonant current, thereby providing the field inversion device with the energy required for pre-ionization; the short circuit of the first consumption unit is controlled by the first control unit, and the on-off of the control resonant unit is controlled by the second control unit; the on-off of the positive energy storage unit and the negative energy storage unit are controlled by the third control unit and the fourth control unit; and the rise time of the bias field is also controlled by the current source unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the examples. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort. In the drawings: Figure 1 This is a schematic diagram of the high-voltage power supply topology circuit of a traditional field inversion device; Figure 2 Schematic diagram of coil current generated by the high voltage power supply topology circuit of the traditional field inversion device; Figure 3 This is a schematic diagram of module connections of an energy-consuming pulse special power supply topology circuit in this embodiment; Figure 4 This is a circuit diagram of an energy-consuming pulse special power supply topology circuit in Example 1; Figure 5 This is a schematic diagram of the switch control timing of an energy-consuming pulse special power supply topology circuit in this embodiment; Figure 6 This is an output current waveform diagram of an energy-consuming pulse special power supply topology circuit in this embodiment; Figure 7 This is the output current waveform diagram of the forward energy storage unit in this embodiment when the initial voltage is 1800V; Figure 8 This is the output current waveform of the forward energy storage unit in this embodiment when the initial voltage is 1000V; Figure 9 This is a circuit diagram of an energy-consuming pulse special power supply topology circuit in Example 2. DETAILED DESCRIPTION

[0017] The following description of exemplary embodiments of the present disclosure is made in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be appreciated by those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0018] In this disclosure, unless otherwise specified, the use of terms such as "first" and "second" to describe various elements is not intended to limit the positional relationship, temporal relationship, or importance relationship of these elements. Such terms are only used to distinguish one element from another. In some examples, the first element and the second element may refer to the same instance of the element, while in some cases, based on the context of the description, they may also refer to different instances.

[0019] The terms used in the descriptions of various examples in this disclosure are for the purpose of describing specific examples only and are not intended to be limiting. Unless the context clearly indicates otherwise, if the number of elements is not specifically limited, the element may be one or more. In addition, the term "and / or" used in this disclosure encompasses any one and all possible combinations of the listed items.

[0020] The present invention provides an energy-consuming pulse special power supply topology circuit, proposing a topology based on semiconductor devices, to provide a specific waveform for the θ-pinch coil of a field inversion device. Through the current outputs of a positive energy storage unit, a negative energy storage unit, and a resonant unit, as well as the bias current provided by a current source unit, combined with the coordinated control of multiple control units, a specific current waveform is provided for the θ-pinch coil of the field inversion device (the current rapidly drops to a negative current of a certain value, then oscillates at the negative current peak, and after multiple oscillation wave heads, the current rapidly rises to a positive current of a certain value, then maintains a positive current flat top, and finally the current rapidly drops), thereby solving the problem of unstable deflection magnetic field in traditional topologies.

[0021] Example 1 See also Figure 3 , Figure 3 The present invention shows a structural schematic diagram of an energy-consuming pulse special power supply topology circuit, which includes: a positive energy storage unit, which is used to output a positive current to an external load coil to provide the field inversion device with the energy required for main compression; a negative energy storage unit, which is used to output a negative current to the external load coil to provide the field inversion device with bias field energy; and is also used to charge the current source unit; the current source unit, which is used to receive and store electrical energy and provide a bias current to the external load coil to create bias conditions for the field inversion device; a resonance unit, which is used to output a resonant current to the external load coil to provide the field inversion device with the energy required for pre-ionization; a first consumption unit, which is used to consume the residual electrical energy after the external load coil and the current source unit work; a first control unit, which is used to control the short circuit of the first consumption unit; a second control unit, which is used to control the on and off of the resonance unit; a third control unit, which is used to control the on and off of the negative energy storage unit; and a fourth control unit, which is used to control the on and off of the positive energy storage unit.

[0022] It should be noted that, in this embodiment, the positive energy storage unit stores electrical energy and outputs a positive current to the θ-pinch coil during operation, thereby providing the field inversion device with the energy required for the main compression stage; the negative energy storage unit stores electrical energy and outputs a negative current to the θ-pinch coil during operation, thereby providing the field inversion device with the energy required for the bias field stage, and at the same time, the negative energy storage unit also charges the current source unit during operation; the current source unit stores electrical energy through the charging of the negative energy storage unit, so as to output a bias current to the θ-pinch coil during operation, thereby creating bias conditions for the field inversion device; the resonant unit stores electrical energy and outputs a resonant current to the θ-pinch coil during operation, thereby providing pre-ionization for the field inversion device. The energy required for the stage is consumed by the first consumption unit; the residual electric energy on the θ-pinch coil and the current source unit is consumed after operation, thereby avoiding damage to the device; the first control unit is used to facilitate the short-circuit of the first consumption unit when needed, thereby preventing the first consumption unit from consuming the working current during operation; the second control unit is used to facilitate the on-off control of the resonance unit, so that the resonance unit is controlled to work to output the resonant current when needed; the third control unit is used to facilitate the on-off control of the negative energy storage unit, so that the negative energy storage unit is controlled to work to output the negative current when needed; the fourth control unit is used to facilitate the on-off control of the positive energy storage unit, so that the positive energy storage unit is controlled to work to output the positive current when needed.

[0023] In which, the first connection end of the first consumption unit is connected to the first external port, the second connection end of the first consumption unit is connected to the first connection end of the current source unit, the second connection end of the current source unit is connected to the first connection end of the third control unit, the second connection end of the third control unit is connected to the first connection end of the negative energy storage unit, and the second connection end of the negative energy storage unit is connected to the second external port; the first connection end of the positive energy storage unit is connected to the second external port, the second connection end of the positive energy storage unit is connected to the first connection end of the fourth control unit, and the second connection end of the fourth control unit is connected to the first external port; the first connection end of the first control unit is connected to the first connection end of the first consumption unit, and the second connection end of the first control unit is connected to the second connection end of the first consumption unit; the first connection end of the second control unit is connected to the first connection end of the current source unit, the second connection end of the second control unit is connected to the first connection end of the resonance unit, and the second connection end of the resonance unit is connected to the second connection end of the current source unit; the second output end of the current source unit is also connected to the second external port, and a first unidirectional control unit is connected between the current source unit and the second external port; the second external port is also connected to the first connection end of the fourth control unit, and a second unidirectional control unit is connected between the second external port and the fourth control unit.

[0024] It should be noted that, in this embodiment, the external load coil specifically refers to the θ-pinch coil of the field inversion device, and the first external port and the second external port are respectively connected to the two ends of the θ-pinch coil; it should also be noted that before using this power supply topology, the positive energy storage unit, the negative energy storage unit and the resonant unit need to be charged in advance; at the same time, the control timing of the first control unit, the second control unit, the third control unit and the fourth control unit is set based on actual needs. This technical content is a conventional technical means in this field and will not be elaborated here.

[0025] As a possible implementation manner, a second consumption unit is connected between the second external port and the second unidirectional control unit.

[0026] It should be noted that, in this embodiment, a second consumption unit is provided between the second external port and the second unidirectional control unit to further consume the residual electric energy of the θ-pinch coil and the current source unit after operation.

[0027] As a possible implementation, both the first consumption unit and the second consumption unit use consumption resistors.

[0028] It should be noted that, in this embodiment, the consumption resistor refers to a resistance device used for consuming electric energy. The use of a resistance device for consuming electric energy is a conventional technical means in this field and will not be elaborated on here. By connecting two consumption resistors to the current flow path, the residual electric energy on the θ-pinch coil and the current source unit is consumed after a discharge cycle.

[0029] At the same time, it should also be noted that the consumption resistor has two connection ends, the first connection end of the first consumption unit is the connection end on one side of the corresponding consumption resistor, and the second connection end of the first consumption unit is the connection end on the other side of the corresponding consumption resistor; similarly, the first connection end of the second consumption unit is the connection end on one side of the corresponding consumption resistor, and the second connection end of the second consumption unit is the connection end on the other side of the corresponding consumption resistor.

[0030] As a possible implementation, both the first unidirectional control unit and the second unidirectional control unit use freewheeling diodes.

[0031] It should be noted that, in this embodiment, two unidirectional current paths are provided by arranging a first unidirectional control unit between the current source unit and the second external port, and arranging a second unidirectional control unit between the second external port and the fourth control unit.

[0032] At the same time, it should also be noted that the freewheeling diode has a positive pole and a negative pole, the positive pole of the first unidirectional control unit is connected to the current source unit, and the negative pole of the first unidirectional control unit is connected to the second external port; the positive pole of the second unidirectional control unit is connected to the second consumption unit, and the negative pole of the second unidirectional control unit is connected to the fourth control unit.

[0033] As a possible implementation, the first control unit, the second control unit, and the third control unit each include an IGBT component and a freewheeling diode connected in reverse parallel to the IGBT component.

[0034] It should be noted that, in this embodiment, the first control unit, the second control unit and the third control unit are all composed of an IGBT component and a freewheeling diode, and the IGBT component and the freewheeling diode are connected in reverse parallel according to the direction of current flow; at the same time, all IGBT components are used as fully-controlled switches, and can also be replaced by other high-speed fully-controlled devices.

[0035] It should also be noted that the IGBT component has a collector, a gate and an emitter, and the freewheeling diode has a positive pole and a negative pole; in the first control unit, the connection end between the collector of the IGBT component Q1 and the negative pole of the freewheeling diode D1 serves as the first connection end of the first control unit, and the connection end between the emitter of the IGBT component Q1 and the positive pole of the freewheeling diode D1 serves as the second connection end of the first control unit; in the second control unit, the connection end between the collector of the IGBT component Q2 and the negative pole of the freewheeling diode D2 serves as the first connection end of the second control unit, and the connection end between the emitter of the IGBT component Q2 and the positive pole of the freewheeling diode D2 serves as the second connection end of the second control unit; in the third control unit, the connection end between the collector of the IGBT component Q3 and the negative pole of the freewheeling diode D3 serves as the first connection end of the third control unit, and the connection end between the emitter of the IGBT component Q3 and the positive pole of the freewheeling diode D3 serves as the second connection end of the third control unit; the gates of the IGBT components Q1, Q2 and Q3 are all used to input external timing control signals.

[0036] As a possible implementation, the fourth control unit uses a pulse thyristor.

[0037] It should be noted that, in this embodiment, the fourth control unit adopts a pulse thyristor, which adjusts the on-off state of the forward current by controlling the gate voltage.

[0038] It should also be noted that the pulse thyristor has an anode, a cathode and a gate. The anode of the pulse thyristor serves as the first connection terminal of the fourth control unit, the cathode of the pulse thyristor serves as the second connection terminal of the fourth control unit, and the gate of the pulse thyristor is used to input an external timing control signal.

[0039] As a possible implementation, the current source unit adopts an energy storage inductor.

[0040] It should be noted that, in this embodiment, the current source unit adopts an energy storage inductor, which refers to an inductive device for storing electrical energy. The use of inductive devices for storing electrical energy is a conventional technical means in this field and will not be elaborated on here. The energy storage inductor is added to the circuit as an energy storage device to output a bias current to the θ-pinch coil during operation, thereby creating bias conditions for the field inversion device. At the same time, a varistor can be connected in parallel to the energy storage inductor according to actual conditions to limit the voltage of the energy storage inductor. This technology is a conventional technical means in this field and will not be elaborated on here.

[0041] It should also be noted that, in this embodiment, the energy storage inductor has two connection terminals, one of which serves as the first connection terminal of the current source unit, and the other serves as the second connection terminal of the current source unit.

[0042] As a possible implementation, the positive energy storage unit adopts a positive energy storage capacitor, and the negative energy storage unit adopts a negative energy storage capacitor.

[0043] It should be noted that, in this embodiment, both the positive energy storage capacitor and the negative energy storage capacitor refer to capacitive devices for storing electrical energy. The use of capacitive devices for storing electrical energy is a conventional technical means in this field and will not be elaborated on here. The positive energy storage capacitor is used to store electrical energy and outputs a positive current to the θ-pinch coil when working, thereby providing the field inversion device with the energy required for main compression. The negative energy storage capacitor is used to store electrical energy and outputs a negative current to the θ-pinch coil when working, thereby providing the field inversion device with bias field energy.

[0044] It should also be noted that both the positive energy storage capacitor and the negative energy storage capacitor have a positive pole and a negative pole. The negative pole of the positive energy storage capacitor serves as the first connection end of the positive energy storage unit, and the positive pole of the positive energy storage capacitor serves as the second connection end of the positive energy storage unit; the negative pole of the negative energy storage capacitor serves as the first connection end of the negative energy storage unit, and the positive pole of the negative energy storage capacitor serves as the second connection end of the positive energy storage unit.

[0045] As a possible implementation, the resonant unit adopts a resonant capacitor.

[0046] It should be noted that, in this embodiment, the resonant capacitor refers to a circuit component used to form electromagnetic oscillation in parallel with the energy storage inductor to achieve energy regulation. This technology is a conventional technical means in this field and will not be described in detail here.

[0047] It should also be noted that the resonant capacitor has a positive electrode and a negative electrode, the negative electrode of the resonant capacitor serves as the first connection end of the resonant unit, and the positive electrode of the resonant capacitor serves as the second connection end of the resonant unit.

[0048] Specifically, in this embodiment, a positive or negative current is output to the external load coil through the positive energy storage unit and the negative energy storage unit to provide the field inversion device with the energy required for the main compression stage and the bias field stage; at the same time, the residual electric energy of the external load coil and the current source unit is consumed by two consumption resistors after the power supply is completed, thereby avoiding damage to the device; the current source receives electric energy to provide a bias current to the external load coil to create a bias condition; the resonant current is output through the resonance unit, which is combined with the bias current on the external load coil to form a biased resonant current, thereby providing the field inversion device with the energy required for pre-ionization; the short circuit of the first consumption unit is controlled by the first control unit, and the on and off of the control resonant unit is controlled by the second control unit; the on and off of the positive energy storage unit and the negative energy storage unit are controlled by the third control unit and the fourth control unit; and the rise time of the bias field is also controlled by the current source unit.

[0049] Working principle: See Figure 4 As shown in the figure, a circuit diagram of an energy consumption type pulse special power supply topology circuit is given. When in use, the power supply circuit is connected to the θ-pinch coil of the field inversion device (for example Figure 4 and set the switch control timing (for example Figure 5 As shown), and charging the positive energy storage capacitor C3, the negative energy storage capacitor C1 and the resonant capacitor C2; First, when time t1 is reached, the long pulse triggers the IGBT component Q1, short-circuiting the consumption resistor R1 (see the switch control timing for details). Figure 5 The bleeder resistor timing in the ); then trigger the IGBT component Q3 (see the switch control timing for Figure 5 In the bias field timing sequence, the energy storage inductor L2 and the θ-pinch coil L1 are connected in series. The negative energy storage capacitor C1 provides current to the θ-pinch coil L1, and at the same time charges the energy storage inductor L2, creating bias conditions for the next resonant operation. At this time, the current path is C1-L1-Q1-L2-Q3-C1. The current waveform of the input θ-pinch coil L1 can be seen in Figure 6 The t1-t2 period in When the time t2 is reached, the IGBT component Q3 is turned off (see the switch control timing for details). Figure 5 In the bias field timing sequence, the current path is L2-D4-L1-Q1-L2. This short time is mainly used to provide the IGBT component Q3 with a turn-off time. Delaying the triggering of the IGBT component Q2 can extend the bias field time. When the time t3 is reached, IGBT component Q2 is triggered (see the switch control timing for details). Figure 5Pre-ionization timing), the resonant current output by the resonant capacitor C2 is combined with the bias current output by the energy storage inductor L2 to form a biased resonant current waveform on the θ-pinch coil L1. At this time, there are three current paths, the first of which is L2-D4-L1-Q1-L2, the second is C2-D4-L1-Q1-Q2-C2, and the third is C2-L2-Q2-C2. The current waveform of the input θ-pinch coil L1 can be seen in Figure 6 The t3-t4 period in the When the time t4 is reached, the IGBT component Q2 is turned off and the pulse thyristor SCR1 is triggered (see the switch control timing for details). Figure 5 The forward energy storage capacitor C3 causes the current in the θ-pinch coil L1 to reverse direction. The current paths are C3-SCR1-L1-C3 and C3-SCR1-Q1-L2-D4-C3. The current waveform of the input θ-pinch coil L1 is shown in Figure 6 The t4-t5 period in When time t5 is reached, the IGBT component Q1 and the pulse thyristor SCR1 are turned off, and the energy consumption resistors R4 and R2 enter the circuit, which respectively consume the energy of the inductor L2 and the θ-pinch coil L1. There are two energy paths. The energy path of L1 is L1-R2-D5-SCR1-L1, and the energy path of L2 is L2-D4-R2-D5-SCR1-R1-L2. The current waveform of the input θ-pinch coil is shown in Figure 6 The t5-t6 period in the.

[0050] Specifically, in this embodiment, the resonant frequency can be obtained by calculating the parameters of the energy storage inductor L2 and the resonant capacitor C2. Changing the initial charging voltage of the resonant capacitor C2 can change the amplitude of the resonant waveform. Changing the initial charging voltage of the positive energy storage capacitor C3 and the negative energy storage capacitor C1 can change the peak value of the waveform. Figure 7 and Figure 8 As shown, it is obvious that the resonance amplitude changes after changing the initial voltage of the forward energy storage capacitor C3.

[0051] Example 2 This embodiment also provides an energy consumption type pulse special power supply topology circuit, see Figure 9As shown, the difference from Example 1 is that the positions of the first consumption unit and the first control unit in the circuit are different, specifically: the first external port is connected to the first connection end of the current source unit, the second connection end of the current source unit is connected to the first connection end of the first consumption unit, the second connection end of the first consumption unit is connected to the first connection end of the third control unit, the second connection end of the third control unit is connected to the first connection end of the negative energy storage unit, and the second connection end of the negative energy storage unit is connected to the second external port; the first connection end of the positive energy storage unit is connected to the second external port, the second connection end of the positive energy storage unit is connected to the first connection end of the fourth control unit, and the second connection end of the fourth control unit is connected to the first external port The first connection end of the first control unit is connected to the first connection end of the first consumption unit, and the second connection end of the first control unit is connected to the second connection end of the first consumption unit; the first connection end of the second control unit is connected to the first connection end of the current source unit, the second connection end of the second control unit is connected to the first connection end of the resonance unit, and the second connection end of the resonance unit is connected to the second connection end of the first consumption unit; the second output end of the first consumption unit is also connected to the second external port, and a first unidirectional control unit is connected between the first consumption unit and the second external port; the second external port is also connected to the first connection end of the fourth control unit, and a second unidirectional control unit is connected between the second external port and the fourth control unit; It should be noted that, in this embodiment, the external load coil specifically refers to the θ-pinch coil of the field inversion device, and the first external port and the second external port are respectively connected to the two ends of the θ-pinch coil; it should also be noted that before using this power supply topology, the positive energy storage unit, the negative energy storage unit and the resonant unit need to be charged in advance; at the same time, the control timing of the first control unit, the second control unit, the third control unit and the fourth control unit is set based on actual needs. This technical content is a conventional technical means in this field and will not be elaborated here.

[0052] As a possible implementation manner, a second consumption unit is connected between the second external port and the second unidirectional control unit.

[0053] It should be noted that, in this embodiment, a second consumption unit is provided between the second external port and the second unidirectional control unit to further consume the residual electric energy of the θ-pinch coil and the current source unit after operation.

[0054] As a possible implementation, both the first consumption unit and the second consumption unit use consumption resistors.

[0055] It should be noted that, in this embodiment, the consumption resistor refers to a resistance device used for consuming electric energy. The use of a resistance device for consuming electric energy is a conventional technical means in this field and will not be elaborated on here. By connecting two consumption resistors to the current flow path, the residual electric energy on the θ-pinch coil and the current source unit is consumed after a discharge cycle.

[0056] At the same time, it should also be noted that the consumption resistor has two connection ends, the first connection end of the first consumption unit is the connection end on one side of the corresponding consumption resistor, and the second connection end of the first consumption unit is the connection end on the other side of the corresponding consumption resistor; similarly, the first connection end of the second consumption unit is the connection end on one side of the corresponding consumption resistor, and the second connection end of the second consumption unit is the connection end on the other side of the corresponding consumption resistor.

[0057] As a possible implementation, both the first unidirectional control unit and the second unidirectional control unit use freewheeling diodes.

[0058] It should be noted that, in this embodiment, two unidirectional current paths are provided by arranging a first unidirectional control unit between the current source unit and the second external port, and arranging a second unidirectional control unit between the second external port and the fourth control unit.

[0059] At the same time, it should also be noted that the freewheeling diode has a positive pole and a negative pole, the positive pole of the first unidirectional control unit is connected to the current source unit, and the negative pole of the first unidirectional control unit is connected to the second external port; the positive pole of the second unidirectional control unit is connected to the second consumption unit, and the negative pole of the second unidirectional control unit is connected to the fourth control unit.

[0060] As a possible implementation, the first control unit, the second control unit, and the third control unit each include an IGBT component and a freewheeling diode connected in reverse parallel to the IGBT component.

[0061] It should be noted that, in this embodiment, the first control unit, the second control unit and the third control unit are all composed of an IGBT component and a freewheeling diode, and the IGBT component and the freewheeling diode are connected in reverse parallel according to the direction of current flow; at the same time, all IGBT components are used as fully-controlled switches, and can also be replaced by other high-speed fully-controlled devices.

[0062] It should also be noted that the IGBT component has a collector, a gate and an emitter, and the freewheeling diode has a positive pole and a negative pole; in the first control unit, the connection end between the collector of the IGBT component Q1 and the negative pole of the freewheeling diode D1 serves as the first connection end of the first control unit, and the connection end between the emitter of the IGBT component Q1 and the positive pole of the freewheeling diode D1 serves as the second connection end of the first control unit; in the second control unit, the connection end between the collector of the IGBT component Q2 and the negative pole of the freewheeling diode D2 serves as the first connection end of the second control unit, and the connection end between the emitter of the IGBT component Q2 and the positive pole of the freewheeling diode D2 serves as the second connection end of the second control unit; in the third control unit, the connection end between the collector of the IGBT component Q3 and the negative pole of the freewheeling diode D3 serves as the first connection end of the third control unit, and the connection end between the emitter of the IGBT component Q3 and the positive pole of the freewheeling diode D3 serves as the second connection end of the third control unit; the gates of the IGBT components Q1, Q2 and Q3 are all used to input external timing control signals.

[0063] As a possible implementation, the fourth control unit uses a pulse thyristor.

[0064] It should be noted that, in this embodiment, the fourth control unit adopts a pulse thyristor, which adjusts the on-off state of the forward current by controlling the gate voltage.

[0065] It should also be noted that the pulse thyristor has an anode, a cathode and a gate. The anode of the pulse thyristor serves as the first connection terminal of the fourth control unit, the cathode of the pulse thyristor serves as the second connection terminal of the fourth control unit, and the gate of the pulse thyristor is used to input an external timing control signal.

[0066] As a possible implementation, the current source unit adopts an energy storage inductor.

[0067] It should be noted that, in this embodiment, the current source unit adopts an energy storage inductor, which refers to an inductive device for storing electrical energy. The use of inductive devices for storing electrical energy is a conventional technical means in this field and will not be elaborated on here. The energy storage inductor is added to the circuit as an energy storage device to output a bias current to the θ-pinch coil during operation, thereby creating bias conditions for the field inversion device. At the same time, a varistor can be connected in parallel to the energy storage inductor according to actual conditions to limit the voltage of the energy storage inductor. This technology is a conventional technical means in this field and will not be elaborated on here.

[0068] It should also be noted that, in this embodiment, the energy storage inductor has two connection terminals, one of which serves as the first connection terminal of the current source unit, and the other serves as the second connection terminal of the current source unit.

[0069] As a possible implementation, the positive energy storage unit adopts a positive energy storage capacitor, and the negative energy storage unit adopts a negative energy storage capacitor.

[0070] It should be noted that, in this embodiment, both the positive energy storage capacitor and the negative energy storage capacitor refer to capacitive devices for storing electrical energy. The use of capacitive devices for storing electrical energy is a conventional technical means in this field and will not be elaborated on here. The positive energy storage capacitor is used to store electrical energy and outputs a positive current to the θ-pinch coil when working, thereby providing the field inversion device with the energy required for main compression. The negative energy storage capacitor is used to store electrical energy and outputs a negative current to the θ-pinch coil when working, thereby providing the field inversion device with bias field energy.

[0071] It should also be noted that both the positive energy storage capacitor and the negative energy storage capacitor have a positive pole and a negative pole. The negative pole of the positive energy storage capacitor serves as the first connection end of the positive energy storage unit, and the positive pole of the positive energy storage capacitor serves as the second connection end of the positive energy storage unit; the negative pole of the negative energy storage capacitor serves as the first connection end of the negative energy storage unit, and the positive pole of the negative energy storage capacitor serves as the second connection end of the positive energy storage unit.

[0072] As a possible implementation, the resonant unit adopts a resonant capacitor.

[0073] It should be noted that, in this embodiment, the resonant capacitor refers to a circuit component used to form electromagnetic oscillation in parallel with the energy storage inductor to achieve energy regulation. This technology is a conventional technical means in this field and will not be described in detail here.

[0074] It should also be noted that the resonant capacitor has a positive electrode and a negative electrode, the negative electrode of the resonant capacitor serves as the first connection end of the resonant unit, and the positive electrode of the resonant capacitor serves as the second connection end of the resonant unit.

[0075] Working principle: See Figure 4 As shown in the figure, a circuit diagram of an energy consumption type pulse special power supply topology circuit is given. When in use, the power supply circuit is connected to the θ-pinch coil of the field inversion device (for example Figure 9 and set the switch control timing (for example Figure 5 As shown), and charging the positive energy storage capacitor C3, the negative energy storage capacitor C1 and the resonant capacitor C2; First, when time t1 is reached, the long pulse triggers the IGBT component Q1, short-circuiting the consumption resistor R1 (see the switch control timing for details). Figure 5 The bleeder resistor timing in the ); then trigger the IGBT component Q2 (see the switch control timing for Figure 5In the bias field timing sequence, the energy storage inductor L2 and the θ-pinch coil L1 are connected in series. The negative energy storage capacitor C1 provides current to the θ-pinch coil L1, and at the same time charges the energy storage inductor L2, creating bias conditions for the next resonant operation. At this time, the current path is C1-L1-L2-Q1-Q2-C1. The current waveform of the input θ-pinch coil L1 can be seen in Figure 6 The t1-t2 period (the current waveform is consistent with that in Example 1); When the time t2 is reached, IGBT component Q2 is turned off (see the switch control timing for details). Figure 5 In the bias field timing sequence, the current path is L2-Q1-D4-L1-L2. This short time is mainly used to provide the IGBT component Q3 with a turn-off time. Delaying the triggering of the IGBT component Q3 can extend the bias field time. When the time t3 is reached, the IGBT component Q3 is triggered (see the switch control timing for details). Figure 5 Pre-ionization timing), using the resonant capacitor C2 to output the resonant current, combined with the bias current output by the energy storage inductor L2 to output a biased resonant current waveform to the θ-pinch coil L1. At this time, there are three current paths, the first of which is L2-Q1-D4-L1-L2, the second is C2-D4-L1-Q3-C2, and the third is L2-Q1-C2-D3-L2. The current waveform input to the θ-pinch coil L1 is shown in Figure 6 The t3-t4 period (the current waveform is consistent with that in Example 1); When the time t4 is reached, the IGBT component Q3 is turned off and the pulse thyristor SCR2 is triggered (see the switch control timing for details). Figure 5 The forward energy storage capacitor C3 causes the current in the θ-pinch coil L1 to reverse direction. The current paths are C3-SCR2-L1-C3 and C3-SCR2-L2-Q1-D4-C3. The current waveform of the input θ-pinch coil L1 is shown in Figure 6 The t4-t5 period (the current waveform is consistent with that in Example 1); When time t5 is reached, the IGBT component Q1 and the pulse thyristor SCR2 are turned off, and the energy consumption resistors R4 and R2 enter the circuit, which respectively consume the energy of the inductor L2 and the θ-pinch coil L1. There are two energy paths. The energy path of L1 is L1-R2-D5-SCR2-L1, and the energy path of L2 is L2-R1-D4-R2-D5-SCR2-L2. The current waveform of the input θ-pinch coil is shown in Figure 6 The t5-t6 period in FIG. 1 (the current waveform is consistent with that in Example 1).

[0076] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An energy-consuming pulse special power supply topology circuit, characterized in that: The circuit includes: The forward energy storage unit is used to output a forward current to the external load coil, providing the energy required for the main compression of the field inversion device; The negative energy storage unit is used to output a negative current to the external load coil to provide bias field energy for the field inversion device; it is also used to charge the current source unit; A current source unit is used to receive and store electrical energy and provide a bias current to an external load coil to create a bias condition for a field inversion device; The resonance unit is used to output a resonance current to an external load coil to provide the field inversion device with the energy required for pre-ionization; A first consumption unit is used to consume residual electric energy after the external load coil and the current source unit work; a first control unit, configured to control the first consumption unit to short-circuit; A second control unit, used to control the on and off of the resonant unit; A third control unit is used to control the on and off of the negative energy storage unit; The fourth control unit is used to control the on and off of the forward energy storage unit.

2. The energy consumption type pulse special power supply topology circuit according to claim 1, characterized in that: The first connection end of the first consumption unit is connected to the first external port, the second connection end of the first consumption unit is connected to the first connection end of the current source unit, the second connection end of the current source unit is connected to the first connection end of the third control unit, the second connection end of the third control unit is connected to the first connection end of the negative energy storage unit, and the second connection end of the negative energy storage unit is connected to the second external port; The first connection end of the forward energy storage unit is connected to the second external port, the second connection end of the forward energy storage unit is connected to the first connection end of the fourth control unit, and the second connection end of the fourth control unit is connected to the first external port; The first connection end of the first control unit is connected to the first connection end of the first consumable unit, and the second connection end of the first control unit is connected to the second connection end of the first consumable unit; A first connection end of the second control unit is connected to the first connection end of the current source unit, a second connection end of the second control unit is connected to the first connection end of the resonance unit, and a second connection end of the resonance unit is connected to the second connection end of the current source unit; The second output end of the current source unit is also connected to the second external port, and a first unidirectional control unit is connected between the current source unit and the second external port; the second external port is also connected to the first connection end of the fourth control unit, and a second unidirectional control unit is connected between the second external port and the fourth control unit.

3. The energy consumption type pulse special power supply topology circuit according to claim 1, characterized in that: The first external port is connected to the first connection end of the current source unit, the second connection end of the current source unit is connected to the first connection end of the first consumption unit, the second connection end of the first consumption unit is connected to the first connection end of the third control unit, the second connection end of the third control unit is connected to the first connection end of the negative energy storage unit, and the second connection end of the negative energy storage unit is connected to the second external port; The first connection end of the forward energy storage unit is connected to the second external port, the second connection end of the forward energy storage unit is connected to the first connection end of the fourth control unit, and the second connection end of the fourth control unit is connected to the first external port; The first connection end of the first control unit is connected to the first connection end of the first consumable unit, and the second connection end of the first control unit is connected to the second connection end of the first consumable unit; A first connection terminal of the second control unit is connected to the first connection terminal of the current source unit, a second connection terminal of the second control unit is connected to the first connection terminal of the resonance unit, and a second connection terminal of the resonance unit is connected to the second connection terminal of the first consumption unit; The second output end of the first consumer unit is also connected to the second external port, and a first unidirectional control unit is connected between the first consumer unit and the second external port; the second external port is also connected to the first connection end of the fourth control unit, and a second unidirectional control unit is connected between the second external port and the fourth control unit.

4. An energy-consuming pulse special power supply topology circuit according to claim 2 or 3, characterized in that: A second consumption unit is connected between the second external port and the second unidirectional control unit.

5. The energy consumption type pulse special power supply topology circuit according to claim 4, characterized in that: The first consumption unit and the second consumption unit both use consumption resistors.

6. An energy-consuming pulse special power supply topology circuit according to claim 2 or 3, characterized in that: The first unidirectional control unit and the second unidirectional control unit both use freewheeling diodes.

7. An energy-consuming pulse special power supply topology circuit according to claim 2 or 3, characterized in that: The first control unit, the second control unit and the third control unit each include an IGBT component and a freewheeling diode connected in reverse parallel to the IGBT component.

8. An energy-consuming pulse special power supply topology circuit according to claim 2 or 3, characterized in that: The fourth control unit adopts a pulse thyristor.

9. An energy-consuming pulse special power supply topology circuit according to claim 2 or 3, characterized in that: The current source unit adopts energy storage inductor.

10. An energy-consuming pulse special power supply topology circuit according to claim 2 or 3, characterized in that: The positive energy storage unit adopts a positive energy storage capacitor, and the negative energy storage unit adopts a negative energy storage capacitor.

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