High-voltage direct-current output PSM power supply for nuclear fusion heating

Abstract

The utility model discloses a high-voltage direct-current output PSM power supply for nuclear fusion heating, which comprises a circuit breaker BREAKER, a switching power supply, an input filter rectifier circuit BRIDGE, a filter inductor L1, an energy storage capacitor C2, a filter capacitor C1, a capacitor discharge resistor R2, a high-power IGBT (Insulated Gate Bipolar Translator) and an RC (Resistance-Capacitance) circuit, and the other end of the circuit breaker BREAKER is connected with the input end of the input filtering and rectifying circuit BRIDGE. The design has the following advantages: 1, the effective value of voltage ripples is small, 1t; = 5%; 2, voltage overshoot; = 15%; 3, the structural design is reasonable, the cooperative work effect among all parts is good, and the overall performance of the power supply is improved; and 4, a perfect protection function and good load adaptability are achieved, and a more reliable and safer power supply solution is provided for a user.

Description

Technical Field

[0001] The utility model relates to the technical field of power supplies, in particular to a high-voltage direct current output PSM power supply for nuclear fusion heating. Background Art

[0002] In 1983, Swiss company BBC first introduced a high-power solid-state modulator, or PSM modulator. This revolutionized broadcast transmitter technology. With the continuous development of semiconductor power components, IGBTs (Insulated Gate Bipolar Transistors) have become widely used in various applications. Their introduction into PSM modulators significantly increased the modulator's switching frequency. Increasing the oscillator's output frequency reduces the basic performance requirements and structural size of electronic components such as high-voltage transformers, reactors, smoothing capacitors, and high-voltage capacitors, thereby reducing the size of high-voltage power supplies. This high frequency significantly reduces the size of high-voltage power supplies, making them lighter and more portable, significantly improving their practicality and ease of use. Utility Model Content

[0003] In order to make up for the deficiencies of the prior art, the embodiments of the present application propose a high-voltage direct current output PSM power supply for nuclear fusion heating to solve the problems existing in the prior art.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A high-voltage direct current output PSM power supply for nuclear fusion heating includes a circuit breaker BREAKER, a switching power supply, an input filter rectifier circuit BRIDGE, a filter inductor L1, an energy storage capacitor C2, a filter capacitor C1, a capacitor discharge resistor R2, a high-power IGBT, and an RC circuit. One end of the circuit breaker BREAKER is connected to a 380V mains supply via a through-wall terminal XT01, the other end of the circuit breaker BREAKER is connected to an input end of the input filter rectifier circuit BRIDGE, an output end of the input filter rectifier circuit BRIDGE is connected to the filter capacitor C1, the energy storage capacitor C2, the inductor L1, the resistor R1, and the capacitor discharge resistor R2, the other end of the resistor R1 is connected to the cathode of a diode D1, the anode of the diode D1 is connected to the other end of the inductor L1, Inductor L2, resistor R3 and capacitor C3, the other end of inductor L2 is connected to the anode of diode D2, resistor R6 and pin 3 of the high-power IGBT, the cathode of diode D2 is connected to the other end of resistor R6 and capacitor C4, the other end of capacitor C4 is connected to pin 1 of the high-power IGBT, resistor R7, resistor R10 and wall terminal XT02, the other end of resistor R11 is connected to the other output end of the input filter and rectifier circuit BRIDGE, the other end of the energy storage capacitor C2, the other end of capacitor C3, the other end of the capacitor discharge resistor R2, pin 2 of the high-power IGBT and ground, pins 4 and 5 of the high-power IGBT are connected to the drive signal, the other end of resistor R3 is connected to resistor R4, the other end of resistor R4 is connected to resistor R5, and the other end of resistor R5 is grounded.

[0006] As a further technical solution of the present invention: the model of the input filter and rectifier circuit BRIDGE is MDS100.

[0007] As a further technical solution of the present invention: the model of the high-power IGBT is SKM100GB17E4.

[0008] As a further technical solution of the present invention: the diode D2, the resistor R6 and the capacitor C4 form an RC circuit.

[0009] As a further technical solution of the present invention: the capacitance of the capacitor C1 is 0.39 μF, the capacitance of the capacitor C2 is 600 μF, and the capacitance of the capacitor C3 is 0.39 μF.

[0010] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0011] 1. The effective value of voltage ripple is small, <=5%;

[0012] 2. Voltage overshoot <= 15%;

[0013] 3. The structural design is reasonable, and the various components work together well, which improves the overall performance of the power supply;

[0014] 4. With complete protection functions and good load adaptability, it provides users with a more reliable and safe power supply solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the circuit diagram of a high-voltage DC output PSM power supply used for nuclear fusion heating. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] like Figure 1 As shown, a high-voltage DC output PSM power supply for nuclear fusion heating consists of a circuit breaker, a switching power supply, an input filter and rectifier circuit, a filter inductor, an energy storage capacitor, a filter capacitor, a capacitor discharge resistor, a high-power IGBT, an RC circuit, an output dummy load, and an output rectifier and filter circuit. The inverter circuit utilizes a high-output IGBT full-bridge inverter structure. Insulated-gate bipolar transistors (IGBTs) offer advantages such as high input impedance, fast operation, low on-state voltage, high blocking voltage, and high current handling. Based on the external characteristics requirements of high-power DC regulated power supplies, the design utilizes a dual closed-loop voltage and current feedback system to control the power supply's external characteristics. The resulting power supply exhibits both good power and external drag characteristics, resulting in excellent system external characteristics.

[0018] Three-phase power is input, two phases of which feed the isolation transformer. The power then passes through a circuit breaker and flows through a bridge rectifier, which converts the AC power to DC. This power simultaneously charges capacitors C1 and C2. The power is filtered by an inductor, resulting in a relatively stable current and voltage. The output is controlled by an IGBT, which switches in parallel with an RC circuit consisting of a diode, resistor, and capacitor, providing interference protection. IGBT pin 1 is connected to a dummy load at one end of the output, and the other end of the dummy load is connected to the input of the bridge rectifier. The dummy load is also grounded. A 27-ohm load with an output of 800V and 30A is connected to pins 1 and 2 of the IGBT output for load testing. A current transformer is also required after the main circuit to monitor the current and implement short-circuit protection.

[0019] Here’s how it works:

[0020] 380V mains power is supplied via the XT01 through-the-wall terminal block to three terminals on the circuit breaker. Simultaneously, two phases of the power are fed to the isolation transformer, which automatically shuts down upon receiving the signal. The three-phase power enters the rectifier bridge, where the DC output charges capacitors C1, C2, and C3. C1 is 0.39μF, C2 is 600μF, and C3 is 0.39μF. Inductors L1 and L2 are connected in series to the main circuit. The other end of inductor L2 is connected to pin 3 of the IGBT. Pins 1 and 3 of the IGBT are connected to two diodes and a capacitor, and two resistors are connected in parallel to the two diodes. Pins 1 and 2 of the IGBT are connected to two series-connected dummy loads, which must be grounded. Then, an output terminal XT02 is connected in parallel. A transformer is connected to the rear of the circuit.

[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

[0022] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment have also been appropriately combined to form other implementation methods that are easy for those skilled in the art to understand.

Claims

1. A high-voltage direct current (DC) output power supply (PSM) for nuclear fusion heating, comprising a circuit breaker (BREAKER), a switching power supply, an input filter and rectifier circuit (BRIDGE), a filter inductor (L1), a storage capacitor (C2), a filter capacitor (C1), a capacitor discharge resistor (R2), a high-power IGBT, and an RC circuit, characterized in that: One end of the circuit breaker BREAKER is connected to the 380V mains power through the wall terminal XT01, and the other end of the circuit breaker BREAKER is connected to the input end of the input filter and rectifier circuit BRIDGE. One output end of the input filter and rectifier circuit BRIDGE is connected to the filter capacitor C1, the energy storage capacitor C2, the inductor L1, the resistor R1 and the capacitor discharge resistor R2. The other end of the resistor R1 is connected to the cathode of the diode D1, the anode of the diode D1 is connected to the other end of the inductor L1, the inductor L2, the resistor R3 and the capacitor C3, and the other end of the inductor L2 is connected to the anode of the diode D2, the resistor R6 and the pin of the high-power IGBT.

3. The cathode of diode D2 is connected to the other end of resistor R6 and capacitor C4. The other end of capacitor C4 is connected to pin 1 of the high-power IGBT, resistor R7, resistor R10, and wall terminal XT02. The other end of resistor R11 is connected to the other output end of the input filter and rectifier circuit BRIDGE, the other end of the energy storage capacitor C2, the other end of capacitor C3, the other end of the capacitor discharge resistor R2, pin 2 of the high-power IGBT, and ground. Pins 4 and 5 of the high-power IGBT are connected to the drive signal. The other end of resistor R3 is connected to resistor R4, and the other end of resistor R4 is connected to resistor R5. The other end of resistor R5 is grounded.

2. A high voltage direct current output PSM power supply for nuclear fusion heating according to claim 1, characterized in that: The model of the input filter and rectifier circuit BRIDGE is MDS100.

3. A high voltage direct current output PSM power supply for nuclear fusion heating according to claim 1, characterized in that: The model of the high-power IGBT is SKM100GB17E4.

4. A high voltage direct current output PSM power supply for nuclear fusion heating according to claim 1, characterized in that: The diode D2, the resistor R6 and the capacitor C4 form an RC circuit.

5. A high voltage direct current output PSM power supply for nuclear fusion heating according to claim 1, characterized in that: The capacitance of the capacitor C1 is 0.39 μF, the capacitance of the capacitor C2 is 600 μF, and the capacitance of the capacitor C3 is 0.39 μF.

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