A high-frequency power supply and a direct-current stabilizing device applied to the high-frequency power supply

Abstract

The embodiment of the present specification provides a kind of high-frequency power supply and direct current stabilizing device applied to high-frequency power supply, it is related to heating field.Direct current stabilizing device for high-frequency power supply includes: multiple parallel direct current stabilizing modules, the input end of each direct current stabilizing module receives to be stabilized signal respectively, and there is delay between the to-be-stabilized signal received by different direct current stabilizing modules, the output end of multiple parallel direct current stabilizing modules outputs target stabilized signal, and target stabilized signal is the superposition of the stabilized signal output by multiple direct current stabilizing modules.The present specification receives multiple signals with time delay by multiple direct current stabilizing modules, so that the ripple of multiple signals after stabilizing exists misplacement when superimposed, so that ripple can be eliminated by cancellation, improve the stability of target stabilized signal.

Description

[0001] Case Analysis

[0002] This application is a divisional application of the invention patent application with application number 202211555523.3, application date December 6, 2022, entitled "A high-frequency power supply and a DC voltage regulator device applied to a high-frequency power supply". Technical Field

[0003] This specification relates to the field of heating, and in particular to a high-frequency power supply and a DC voltage regulator device used in high-frequency power supplies. Background Technology

[0004] Heating technology is a crucial technology in modern industrial production. In some scenarios, heating equipment requires high-frequency power supplies, which can provide energy to heat the target object.

[0005] However, due to the switching devices in current high-frequency power supplies, the DC voltage regulators retain some AC components during the voltage regulation process, resulting in significant ripple in the regulated signal and large fluctuations in the output regulated signal. Summary of the Invention

[0006] One embodiment of this specification provides a DC voltage regulator device for high-frequency power supplies. The device includes: multiple DC voltage regulator modules connected in parallel, each DC voltage regulator module receiving a voltage-to-be-regulated signal at its input terminal, with a time delay between the voltage-to-be-regulated signals received by different DC voltage regulator modules, and the output terminals of the multiple parallel DC voltage regulator modules output a target regulated signal, which is the superposition of the regulated signals output by the multiple DC voltage regulator modules.

[0007] In some embodiments, each DC voltage regulator module includes a first voltage regulator circuit and a second voltage regulator circuit, which are connected in series, and the first voltage regulator circuit and the second voltage regulator circuit have different efficiencies.

[0008] In some embodiments, the first voltage regulator circuit is a Buck circuit, and the second voltage regulator circuit is an LLC circuit. The input terminal of the Buck circuit receives the signal to be regulated, the output terminal of the Buck circuit is connected to the input terminal of the LLC circuit, and the output terminal of the LLC circuit outputs the signal regulated by the Buck circuit and the LLC circuit.

[0009] In some embodiments, the delay between the voltage-to-be-regulated signals received by two adjacent DC voltage regulator modules is related to the signal at the output of at least one DC voltage regulator module.

[0010] In some embodiments, the delay corresponds to the period of the signal at the output of the DC voltage regulator module and the number of DC voltage regulator modules.

[0011] In some embodiments, the delay is the same as the ratio of the period of the signal at the output of the DC voltage regulator module to the number of DC voltage regulator modules.

[0012] In some embodiments, the input terminals of multiple parallel DC voltage regulator modules are connected to a rectifier circuit, which rectifies the external power supply to provide a voltage signal to be regulated for the multiple parallel DC voltage regulator modules; the output terminals of the multiple parallel DC voltage regulator modules are connected to a power device to provide a target voltage regulation signal for the power device, so that the power device generates an electrical signal of the target AC frequency.

[0013] One embodiment of this specification provides a high-frequency power supply. The power supply includes: the aforementioned DC voltage regulator for receiving a signal to be regulated and outputting a target regulated signal to a power device; a power device for power regulation of the target regulated signal to generate an electrical signal at a target AC frequency; and a transformer for transforming the electrical signal at the target AC frequency so that the high-frequency power supply provides an output signal.

[0014] The DC voltage regulator device provided in this manual can receive multiple signals with time delays through a multi-stage DC voltage regulator module. This causes the ripples of the multiple signals after voltage regulation to be misaligned when superimposed, thereby eliminating the ripples through cancellation and improving the stability of the target voltage regulator signal. Attached Figure Description

[0015] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0016] Figure 1 This is a structural block diagram of a high-frequency power supply according to some embodiments of this specification;

[0017] Figure 2 This is a structural block diagram of a DC voltage regulator device according to some embodiments shown in this specification;

[0018] Figure 3 This is a schematic diagram illustrating the signal voltage regulation principle according to some embodiments of this specification;

[0019] Figure 4 This is a circuit diagram of a DC voltage regulator module according to some embodiments of this specification.

[0020] Labels: 100-High-frequency power supply; 110-DC voltage regulator; 111-DC voltage regulator module; 112-First voltage regulator circuit; 113-Second voltage regulator circuit; 114-Control circuit; 120-Power device; 130-Transformer; 310-First signal; 311-Ripple peak of regulated signal 1; 312-Ripple trough of regulated signal 1; 320-Second signal; 321-Ripple peak of regulated signal 2; 322-Ripple trough of regulated signal 2; 330-Third signal. Detailed Implementation

[0021] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0022] It should be understood that the terms “system,” “device,” and / or “module” used herein are a method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0023] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the term "comprising" only indicates that it includes the explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0024] Flowcharts are used in this specification to illustrate the operations performed by the system according to embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0025] In some embodiments, DC voltage regulators can provide stable DC signals for application in various scenarios requiring electrical energy, such as power transmission scenarios using DC signals for power transmission, power management scenarios using DC signals for power generation and distribution, and power conversion scenarios using DC signals for step-up and step-down voltage conversion.

[0026] In some embodiments, the DC voltage regulator can be applied to a high-frequency power supply, which can be applied to a heating system. The high-frequency power supply can provide electrical energy to transfer heat energy to the powder to be heated through energy conversion, so that the powder reaches the melting point and melts. The melt reaches supersaturation at the seed crystal site, causing the seed crystal to grow, thereby obtaining a crystal.

[0027] This specification describes a heating system that can provide a high-frequency signal to a resonant component via a high-frequency power supply, driving the resonant component to generate an electromagnetic field that directly acts on the powder. While heating the powder, the system reduces the energy transmitted to the pot body, preventing the pot body from deforming or volatilizing due to heating, thereby achieving the heating of high-melting-point powder.

[0028] This specification also describes a DC voltage regulator device for high-frequency power supplies. This DC voltage regulator device can receive multiple signals with time delays through a multi-stage DC voltage regulator module, so that the ripples of the multiple signals after voltage regulation are misaligned when superimposed. This ripple can be eliminated by cancellation, thereby improving the stability of the target voltage regulator signal.

[0029] It should be understood that the application scenarios of the heating system described in this specification are merely some examples or embodiments of this specification. For those skilled in the art, without any creative effort, this specification can be applied to other similar scenarios based on these drawings.

[0030] The following will combine Figures 1-4 The DC voltage regulator devices involved in the embodiments of this specification will be described in detail. It should be noted that the following embodiments are only used to explain this specification and do not constitute a limitation thereof.

[0031] Figure 1 This is a structural block diagram of a high-frequency power supply 100 according to some embodiments of this specification. For example... Figure 1 As shown, in some embodiments, the high-frequency power supply 100 includes a DC voltage regulator 110, a power device 120, and a transformer 130. The DC voltage regulator 110 receives the signal to be regulated and outputs the target regulated signal to the power device 120. In some embodiments, the DC voltage regulator 110 can receive multiple signals to be regulated with a delay, and then cancel out the ripple of the signals to be regulated by superimposing the signals, thereby stabilizing the voltage of the obtained target regulated signal. For specific implementations of the DC voltage regulator 110, please refer to other contents in this specification, such as... Figures 2-4 And related descriptions.

[0032] Power device 120 can regulate the power of a target regulated signal to generate an electrical signal at a target AC frequency. In some embodiments, power device 120 can generate electrical signals separately through multiple power modules connected in parallel, and then combine the signals at the output terminal to generate an electrical signal at the target AC frequency. In some embodiments, the power at the output terminal of power device 120 can be the same as the sum of the output power of the multiple power modules. In some embodiments, the multiple power modules operate in a time-sharing manner, and the sum of a specific preset AC frequency of the electrical signals output by each power module is the same as the target AC frequency. In some embodiments, the multiple power modules operate simultaneously, and the target AC frequency of the electrical signal output at the output terminal can be the same as the specific preset AC frequency of the electrical signals output by each power module. Thus, by designing multiple power modules connected in parallel, power device 120 can shunt current in the circuits where each power module is located, reducing the current stress that each power module needs to withstand, increasing the freedom of module selection, and reducing circuit cost. Furthermore, the parallel connection between multiple power modules requires a lower inductance in the output circuit of the power module, thereby reducing the ripple output of power device 120.

[0033] Transformer 130 can transform an electrical signal of a target AC frequency to enable high-frequency power supply 100 to provide an output signal. In some embodiments, transformer 130 can use planar coils mounted on a PCB board to induce electromagnetic induction, and adjust the intensity of electromagnetic induction using a magnetic core structure to output an electrical signal for power supply. In some embodiments, transformer 130 may include a PCB board, planar coils, and a magnetic core structure. The PCB board can be used to support the planar coils, such that the planar coils are arranged around the magnetic core structure. The planar coils can receive AC signals and generate electromagnetic induction, allowing the AC signals to be transmitted from one layer of planar coils to another, thus realizing signal transmission. In some embodiments, the magnetic core structure can adjust the intensity of electromagnetic induction, thereby adjusting the parameters of the AC signal (e.g., signal voltage, frequency, etc.) to achieve signal processing.

[0034] Furthermore, in some embodiments, the transformer 130 may include a multi-layer PCB board, a multi-layer planar coil, and a magnetic core structure. Each PCB board has a cutout structure, and each planar coil is fixed on one PCB board and arranged around the cutout structure. The magnetic core structure may include multiple magnetic core plates, each of which can be disposed within the cutout structure of each PCB board, with a gap between adjacent magnetic core plates (e.g., a first magnetic core plate and a second magnetic core plate). Thus, by placing the planar coils within the PCB board, the skin effect area of ​​the planar coils is close to the cross-sectional area of ​​the conductor, which reduces the coil resistance while increasing the heat dissipation area, thereby reducing the skin effect of the planar coils and improving the transformer's power. Furthermore, under the same power and frequency output conditions, the power consumption of the transformer 130 is significantly lower than that of a conventional intermediate frequency transformer. In addition, the transformer 130 can be more effectively applied to high-frequency scenarios and is smaller in size.

[0035] In some embodiments, the high-frequency power supply 100 may further include a rectifier device that can be connected to an external power supply and can be used to rectify the received three-phase electrical signal to output a DC signal to the DC voltage regulator 110. In some embodiments, the rectifier device may include an electromagnetic interference filter and a three-phase rectifier bridge. The electromagnetic interference filter can filter the received three-phase electrical signal to reduce electromagnetic interference from the external environment, and the three-phase rectifier bridge can convert the three-phase electrical signal into a DC signal.

[0036] In some embodiments, the high-frequency power supply 100 may further include a processor and a sampler. The processor can be used to control the operation of devices (e.g., DC regulator 110, power device 120, and transformer 130) and process data. The sampler can sample the output signal provided by the high-frequency power supply 100 and send the sampled signal to the processor so that the processor can adjust the operating state of the devices. In some embodiments, the high-frequency power supply 100 may further include a fuse. The fuse can monitor the output of multiple devices in the high-frequency power supply 100 (e.g., DC regulator 110, power device 120, and transformer 130) to prevent overcurrent, overvoltage, overload, overfrequency, or undervoltage, ensuring normal operation of the devices.

[0037] In some embodiments, the high-frequency power supply 100 may further include a capacitive isolation drive circuit, which can be used to isolate the processor from other devices in the high-frequency power supply 100 (such as DC regulator 110, power device 120 and transformer 130, etc.), using capacitive isolation technology to separate high-voltage transmission from low-voltage control.

[0038] The following are several embodiments that describe in detail the specific implementation of the DC voltage regulator 110, the power device 120, and the transformer 130.

[0039] Figure 2 This is a structural block diagram of a DC voltage regulator 110 according to some embodiments shown in this specification. For example... Figure 2 As shown, in some embodiments, the DC voltage regulator 110 may include: a plurality of DC voltage regulator modules 111 connected in parallel, each DC voltage regulator module 111 receiving a voltage-to-be-regulated signal at its input terminal, and there is a time delay between the voltage-to-be-regulated signals received by different DC voltage regulator modules 111; the output terminals of the plurality of DC voltage regulator modules 111 output a target regulated signal, which is the superposition of the regulated signals output by the plurality of DC voltage regulator modules 111.

[0040] The DC voltage regulator module 111 can be a circuit module that provides a stable DC signal even when the input grid voltage fluctuates or the load changes. In some embodiments, multiple DC voltage regulator modules 111 can be connected in parallel with phase shift, so that each DC voltage regulator module 111 can receive a voltage-to-be-regulated signal with the same waveform but different timing. Since there is a certain amount of noise and / or ripple in the voltage-to-be-regulated signal, in some embodiments, each DC voltage regulator module 111 can filter one voltage-to-be-regulated signal to remove a certain amount of noise and / or ripple and output a regulated signal. In some embodiments, there can be a delay between the voltage-to-be-regulated signals received by different DC voltage regulator modules 111, so that there can also be the same delay between the regulated signals output by different DC voltage regulator modules 111. Since switching devices are usually used for filtering in the DC voltage regulator module 111, a small amount of ripple will still exist in the regulated signal. By setting a delay between different regulated signals, the ripples of multiple regulated signals can be misaligned when superimposed, thereby eliminating the ripple through cancellation and obtaining the target regulated signal.

[0041] Figure 3 This is a schematic diagram illustrating the signal voltage regulation principle according to some embodiments of this specification. For example... Figure 3 As shown, the first signal 310 can be the regulated signal 1, the second signal 320 can be the regulated signal 2, and the third signal 330 can be the target regulated signal. Due to the presence of ripple, the first signal 310 and the second signal 320 exhibit certain fluctuations. Furthermore, there is a time delay T0 between the first signal 310 and the second signal 320, causing the ripple peak 311 of the regulated signal 1 to correspond temporally with the ripple trough 322 of the regulated signal 2, and the ripple trough 312 of the regulated signal 1 to correspond temporally with the ripple peak 321 of the regulated signal 2. When the first signal 310 and the second signal 320 are superimposed, the ripple peak 311 of the regulated signal 1 can cancel out the ripple trough 322 of the regulated signal 2, and the ripple trough 312 of the regulated signal 1 and the ripple peak 321 of the regulated signal 2 can also cancel out, thus obtaining the superimposed third signal 330.

[0042] In this embodiment of the specification, a multi-stage DC voltage regulator module 111 receives multiple signals with time delays, causing the ripples of the multiple signals after voltage regulation to be misaligned when superimposed. This allows the ripples to be eliminated by cancellation, thereby improving the stability of the target voltage regulator signal.

[0043] In some embodiments, the delay between the voltage-to-be-regulated signals received by two adjacent DC voltage regulator modules 111 may be related to the signal at the output terminal of at least one DC voltage regulator module 111. Further, in some embodiments, the delay between the voltage-to-be-regulated signals received by two adjacent DC voltage regulator modules 111 may be related to the period of the signal at the output terminal of the DC voltage regulator module 111. This is to ensure that the ripple peaks and ripple troughs of two adjacent signals correspond in timing (e.g., ...). Figure 3 As shown), the timing positions of the ripple peaks and troughs can be adjusted based on the period of at least one signal. Figure 3 As shown, the time delay T0 between the first signal 310 and the second signal 320 can be related to the period T of the regulated signal. The time delay T0 can be an odd multiple of half of the period T.

[0044] In some embodiments, the ratio of the period of the signal at the output of the DC voltage regulator module 111 to the number of DC voltage regulator modules 111 is related to the delay. In some embodiments, the magnitude of the delay is the same as the ratio of the period of the signal at the output of the DC voltage regulator module 111 to the number of DC voltage regulator modules 111. For example, if there are 10 DC voltage regulator modules 111 connected in parallel, and the period of the signal at the output of the DC voltage regulator module 111 is 100μs, then the delay can be 10μs. The first DC voltage regulator module 111 can start receiving the signal to be regulated from 0s, the second DC voltage regulator module 111 can start receiving the signal to be regulated from 10μs, and so on, with the tenth DC voltage regulator module 111 starting to receive the signal to be regulated from 90μs. Thus, by superimposing the 10 regulated signals, the ripple in the signal can be canceled.

[0045] In some embodiments, each DC voltage regulator module 111 may include a first voltage regulator circuit 112 and a second voltage regulator circuit 113, wherein the first voltage regulator circuit 112 and the second voltage regulator circuit 113 are connected in series, and the first voltage regulator circuit 112 and the second voltage regulator circuit 113 have different efficiencies.

[0046] In some embodiments, each DC voltage regulator module 111 may include one or more voltage regulator circuits. In some embodiments, the voltage regulator circuit may be a combination of one or more circuits, including a Buck circuit, an LLC circuit, a BOOST circuit, etc. The efficiency of the voltage regulator circuit reflects the comparison between the output power and power loss of the voltage regulator circuit. Higher efficiency of the voltage regulator circuit indicates higher output power and lower power loss; conversely, lower efficiency of the voltage regulator circuit indicates lower output power and higher power loss. Different voltage regulator circuits have different efficiencies; for example, the efficiency of a Buck circuit may be lower than that of an LLC circuit. Furthermore, the stability of the voltage regulator circuit reflects the degree to which the voltage regulator circuit suppresses ripple. Higher stability of the voltage regulator circuit indicates better ripple suppression; conversely, lower stability of the voltage regulator circuit indicates poorer ripple suppression. Different voltage regulator circuits also have different stability; for example, the stability of an LLC circuit is lower than that of a Buck circuit.

[0047] In some embodiments, when the DC voltage regulator module 111 includes a first voltage regulator circuit 112 and a second voltage regulator circuit 113, the first voltage regulator circuit 112 and the second voltage regulator circuit 113 can be connected in series to perform multiple filtering and voltage regulation processes on the signal to be stabilized, making the output of the DC voltage regulator module 111 more stable. In some embodiments, the first voltage regulator circuit 112 and the second voltage regulator circuit 113 can be coupled through a transformer to achieve circuit isolation while being connected in series, reducing mutual interference between signals.

[0048] In some embodiments, the first voltage regulator circuit 112 and the second voltage regulator circuit 113 may have different efficiencies, allowing them to complement each other and ensure the overall efficiency of the DC voltage regulator module 111. In some embodiments, the first voltage regulator circuit 112 and the second voltage regulator circuit 113 may have different stability levels, allowing them to complement each other and ensure the overall stability of the DC voltage regulator module 111. Furthermore, the first voltage regulator circuit 112 and the second voltage regulator circuit 113 may employ different topologies, enabling the use of different filtering methods for signal filtering and voltage regulation. For example, the first voltage regulator circuit may be a Buck circuit, and the second voltage regulator circuit may be an LLC circuit. Buck circuits have lower efficiency but higher stability, while LLC circuits have higher efficiency but lower stability. Therefore, the two-stage voltage regulator circuit composed of a Buck circuit and an LLC circuit can have good stability and efficiency.

[0049] In the embodiments of this specification, by setting up multi-stage voltage regulation circuits, different voltage regulation circuits can complement each other, and multiple voltage regulation methods can be used to perform multiple voltage regulation processes on the signal to be stabilized, so as to ensure the overall stability and efficiency of the DC voltage regulator module 111.

[0050] It should be noted that the first voltage regulator circuit 112 and the second voltage regulator circuit 113 described above are only examples. The DC voltage regulator module 111 may also include two or more voltage regulator circuits, such as a third voltage regulator circuit, a fourth voltage regulator circuit, etc. The specific number of voltage regulator circuits can be adjusted according to the filtering and voltage regulation effect required by the DC voltage regulator module 111.

[0051] The following provides an exemplary DC voltage regulator module 111, and details the specific implementation of the first voltage regulator circuit 112 and the second voltage regulator circuit 113.

[0052] In some embodiments, the first voltage regulator circuit 112 is a Buck circuit, and the second voltage regulator circuit 113 is an LLC circuit. The input terminal of the Buck circuit receives the signal to be regulated, the output terminal of the Buck circuit is connected to the input terminal of the LLC circuit, and the output terminal of the LLC circuit outputs the signal regulated by the Buck circuit and the LLC circuit.

[0053] In some embodiments, the Buck circuit can control the switching on and off of its switching components based on a comparison between its output voltage and a reference voltage, thereby bringing the output voltage closer to the reference voltage and improving the stability of the output voltage. In some embodiments, the LLC circuit can control the switching on and off of its switching components to control the charging and discharging state of the resonant capacitor, thereby adjusting the gain provided by the LLC circuit to stabilize the output voltage. In some embodiments, the output terminal of the Buck circuit can be connected to the input terminal of the LLC circuit through a transformer. The transformer can be used to achieve circuit isolation while transmitting signals, reducing mutual interference between signals.

[0054] Correspondingly, in some embodiments, the DC voltage regulator module 111 may also include a control circuit 114. The control circuit 114 may be connected to the first voltage regulator circuit 112 and the second voltage regulator circuit 113 respectively. The control circuit 114 may control the state of the device (e.g., the on and off of the switching device), provide data to the voltage regulator circuit (e.g., reference voltage), or perform data processing and calculation (e.g., comparing the output voltage and the reference voltage).

[0055] Figure 4 This is a circuit diagram of a DC voltage regulator module 111 shown according to some embodiments of this specification. For example... Figure 4As shown, the first voltage regulator circuit 112 may include: capacitors C1-C3, inductors L1-L2, a switch Q1, and a diode D1. The two ends of capacitor C1 can serve as the positive input (Vin+) and negative input (Vin-) respectively, for receiving the signal to be regulated. One end of capacitor C1 can be connected to one end of capacitor C2 via inductor L1, and the other end of capacitor C2 can be grounded. The connection point between capacitor C2 and inductor L1 can be connected to the source of switch Q1. The gate of switch Q1 is connected to control circuit 114 to receive drive signals from control circuit 114. The drain of switch Q1 is connected to the negative terminal of diode D1, and the positive terminal of diode D1 is grounded. The negative terminal of diode D1 is connected to one end of capacitor C3 via inductor L2, and the other end of capacitor C3 is grounded. The two ends of capacitor C3 can output a signal regulated by the first voltage regulator circuit 112.

[0056] In some embodiments, when the output voltage VTEST is lower than the reference voltage VB, the control circuit 114 can control the switch Q1 to turn on, charging the capacitor C3 while increasing the voltage of the output signal; when the output voltage VTEST is lower than the reference voltage VB, the control circuit 114 can control the switch Q1 to turn off, discharging the capacitor C3 while reducing the voltage of the output signal, so that the voltage of the output signal is close to the reference voltage VB.

[0057] In some embodiments, the control circuit 114 can acquire the output voltage VTEST from the primary side of the transformer T1, and the primary side of the transformer T1 can also provide power supply VCC2 to power the control circuit 114.

[0058] In some embodiments, the second voltage regulator circuit 113 may include: switches Q2-Q5, a transformer T1, and a capacitor C4; as well as switches Q6-Q9, capacitors C5-C6, a resistor R1, and an inductor L3. The drain of switch Q6 can be connected to the source of switch Q8 and to the secondary output terminal of transformer T1. The drain of switch Q7 can be connected to the source of switch Q9 and to the secondary input terminal of transformer T1. The drains of switches Q8 and Q9 are connected to the reference negative terminal S-. The sources of switches Q6 and Q7 are connected to one end of capacitor C5 and are also connected to the reference positive terminal S+ and one end of capacitor C6 via inductor L3, respectively. The other end of capacitor C5 is connected to the source of switch Q9 and is also connected to the reference negative terminal S- and the other end of capacitor C6 via resistor R1, respectively. The two ends of capacitor C6 can be used as the positive output terminal Vout+ and the negative output terminal Vout-, respectively, to output the signal after being regulated by the first voltage regulator circuit 112 and the second voltage regulator circuit 113. In some embodiments, the control circuit 114 can also acquire the regulated signal of the positive output terminal Vout+ to adjust the operating state of the second voltage regulator circuit 113.

[0059] In some embodiments, when the second voltage regulator circuit 113 operates in LLC resonant state (e.g., capacitor C4 resonates with the leakage inductance in transformer T1), the switching elements Q6-Q9 can achieve soft-switching, thereby reducing switching losses. Furthermore, when the output voltage across capacitor C6 changes, the voltage division between capacitor C5 and inductor L3 can be stabilized by adjusting the switching frequency of switching elements Q6-Q9, thus maintaining the stability of the voltage across capacitor C6.

[0060] In some embodiments, the control circuit 114 of the DC voltage regulator 110 can be a module in the processor of the high-frequency power supply 100, or it can be set separately from the processor. In some embodiments, the transformer T1 differs from the aforementioned transformer 130 in structure and function. The primary side of the transformer T1 is connected to the switches Q2-Q5, and the secondary side is connected to the switches Q6-Q9. The transformer T1 can be used to transmit signals between the switches Q2-Q9. The primary side of the transformer 130 is connected to the power device 120, and the secondary side of the transformer 130 is used to provide an output signal to the resonant component 200. The transformer 130 can be used to change the properties of the AC signal (e.g., voltage).

[0061] In some embodiments, the input terminals of a plurality of parallel DC voltage regulator modules 111 are connected to a rectifier circuit, which rectifies an external power supply to provide a voltage-to-be-regulated signal to the plurality of parallel DC voltage regulator modules 111. The output terminals of the plurality of parallel DC voltage regulator modules 111 are connected to a power device 120 to provide a target regulated signal to the power device 120, so that the power device 120 generates an electrical signal of the target AC frequency.

[0062] The beneficial effects that the embodiments of this specification may bring include, but are not limited to: receiving multiple signals with time delays through the multi-stage DC voltage regulator module 111, so that the ripples of the multiple signals after voltage regulation are misaligned when superimposed, thereby eliminating the ripples by cancellation and improving the stability of the target voltage regulator signal.

[0063] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0064] Furthermore, this specification uses specific terms to describe embodiments thereof. For example, "some embodiments" refers to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that "some embodiments" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0065] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods described herein. Although various examples have been discussed in the foregoing disclosure of some embodiments of the invention that are currently considered useful, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the spirit and scope of the embodiments described herein. For example, while the system components described above can be implemented using hardware devices, they can also be implemented solely using software solutions, such as installing the described system on existing servers or mobile devices.

[0066] Similarly, it should be noted that, in order to simplify the description disclosed herein and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of embodiments in this specification may sometimes combine multiple features into a single embodiment, drawing, or description thereof. However, this method of disclosure does not imply that the subject matter of this specification requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of a single embodiment disclosed above.

[0067] Some embodiments use numbers to describe the quantity of components and attributes. Correspondingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be varied depending on the specific characteristics required for each embodiment. In some embodiments, numerical parameters should take into account specified significant digits and employ general methods of digit preservation. Although the numerical ranges and parameters used to confirm their breadth in some embodiments of this specification are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0068] For each patent, patent application, patent application publication, and other material, such as articles, books, specifications, publications, and documents, referenced in this specification, the entire contents of which are incorporated herein by reference. This excludes historical application documents that are inconsistent with or conflict with the content of this specification, as well as documents that limit the broadest scope of the claims in this specification (currently or subsequently appended to this specification). It should be noted that in the event of any inconsistency or conflict between the descriptions, definitions, and / or terminology used in the supplementary materials to this specification and the content of this specification, the descriptions, definitions, and / or terminology used in this specification shall prevail.

[0069] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A DC voltage regulator device for use in high-frequency power supplies, characterized in that, include: A DC voltage regulator module includes a first voltage regulator circuit and a second voltage regulator circuit connected in series. The efficiency of the second voltage regulator circuit is higher than that of the first voltage regulator circuit, and the stability of the first voltage regulator circuit is stronger than that of the second voltage regulator circuit. The first voltage regulator circuit includes a Buck circuit, and the second voltage regulator circuit includes an LLC circuit. The input terminal of the Buck circuit receives the signal to be regulated, and the output terminal of the Buck circuit is connected to the input terminal of the LLC circuit. The output terminal of the LLC circuit outputs the signal regulated by the Buck circuit and the LLC circuit.

2. The DC voltage regulator according to claim 1, characterized in that, The DC voltage regulator device includes multiple DC voltage regulator modules connected in parallel. The input terminal of each DC voltage regulator module receives a voltage signal to be regulated, and the output terminals of the multiple parallel DC voltage regulator modules output a target regulated voltage signal. The target regulated voltage signal is the superposition of the regulated signals output by the multiple DC voltage regulator modules.

3. The DC voltage regulator according to claim 2, characterized in that, The delay between the voltage-to-be-regulated signals received by two adjacent DC voltage regulator modules is related to the signal at the output terminal of at least one of the DC voltage regulator modules.

4. The DC voltage regulator according to claim 3, characterized in that, The ratio of the period of the signal at the output terminal of the DC voltage regulator module to the number of the multiple DC voltage regulator modules is related to the delay.

5. The DC voltage regulator according to claim 4, characterized in that, The delay is the same as the ratio of the period of the signal at the output of the DC voltage regulator module to the number of the multiple DC voltage regulator modules.

6. The DC voltage regulator according to claim 2, characterized in that, The input terminals of the multiple parallel DC voltage regulator modules are connected to a rectifier circuit, which rectifies the external power supply to provide a voltage signal to be regulated for the multiple parallel DC voltage regulator modules. The output terminals of multiple parallel DC voltage regulator modules are connected to the power device to provide the power device with a target voltage regulation signal so that the power device generates an electrical signal of the target AC frequency.

7. A high-frequency power supply, characterized in that, include: The power device and the DC voltage regulator as described in any one of claims 1-6, wherein the DC voltage regulator is used to receive a signal to be regulated and output a target regulated signal to the power device, and the power device performs power adjustment on the target regulated signal to generate an electrical signal of a target AC frequency; A transformer that transforms an electrical signal of the target AC frequency so that the high-frequency power supply can provide an output signal.

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