A power supply system, a power supply device, and a power feeding system

Abstract

The application discloses a power supply system, a power supply device and a power supply system, and improves the stability of relative ripple. The power supply system comprises a master control device and a plurality of power supply devices. The master control device is configured to output a synchronization signal to the plurality of power supply devices. Each power supply device is configured to generate an output voltage in response to the synchronization signal. The master control device is further configured to receive a phase adjustment instruction output by a load, determine a first reference phase, and the first reference phase is a fundamental phase of the output voltage of any power supply device in the plurality of power supply devices. The power supply device corresponding to the first reference phase is a first power supply device, and the power supply devices other than the first power supply device in the plurality of power supply devices are second power supply devices. The master control device is further configured to adjust the fundamental phase of the output voltage of one or more second power supply devices based on the first reference phase, so that the relative ripple between the ripple of the output voltage of the one or more second power supply devices and the ripple of the output voltage of the first power supply device is minimized.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a power supply system, power supply equipment and power supply system. Background Technology

[0002] To address the need for multiple power supplies to a load, multiple power supply devices are typically used. However, during the process of multiple power supply devices supplying power to the load, differences in the switching frequency and phase of these devices cause a beat frequency phenomenon in the relative waveforms of the output voltage ripples. This results in instability in the relative ripples of the output voltages from the multiple power supply devices, reducing the stability of the relative ripples and consequently affecting the normal operation of the load. Summary of the Invention

[0003] This application discloses a power supply system, power supply device, and power supply system for reducing relative ripple magnitude and improving relative ripple stability.

[0004] In a first aspect, this application provides a power supply system comprising a main control device and multiple power supply devices. The main control device is connected to the multiple power supply devices, which are also used to connect to a load. The main control device is used to output a synchronization signal to the multiple power supply devices. Each power supply device is used to generate an output voltage in response to the synchronization signal. The fundamental frequency of the ripple of the output voltage is M times the frequency of the synchronization signal, and the fundamental phase of the ripple of the output voltage is referenced to the pulse edge of the synchronization signal, where M is a positive rational number. The main control device is also used to receive a phase adjustment command from the load output and determine a first reference phase, which is the fundamental phase of the ripple of the output voltage of any one of the multiple power supply devices. The power supply device corresponding to the first reference phase is a first power supply device, and the power supply devices other than the first power supply device are second power supply devices. The main control device is also used to adjust the fundamental phase of the output voltage of one or more second power supply devices based on the first reference phase, so that the relative ripple between the output voltage ripple of one or more second power supply devices and the output voltage ripple of the first power supply device is minimized.

[0005] In the above technical solution, the synchronization signal output by the main control device enables the fundamental frequency of the output voltage ripple of multiple power supply devices to be consistent, effectively eliminating the beat frequency phenomenon between the ripples of each power supply device, thereby improving the relative ripple stability between the output voltage ripples of multiple power supply devices. Furthermore, the synchronization signal output by the main control device provides a phase reference for the fundamental phase of the output voltage ripple of multiple power supply devices, providing a basis for subsequent fundamental phase adjustment of the output voltage. In addition, the main control device receives the phase adjustment command output by the load, determines the first reference phase of the first power supply device, and adjusts the fundamental phase of the output voltage of one or more second power supply devices to minimize the relative ripple between the output voltage ripple of one or more second power supply devices and the output voltage ripple of the first power supply device, thereby reducing the relative ripple between the output voltage ripples of each power supply device and further improving the relative ripple stability between the output voltages of multiple power supply devices.

[0006] In one possible implementation, one or more second power supply devices include a plurality of second power supply devices. A master control device is specifically configured to: adjust the fundamental phase of the ripple of the output voltage of the plurality of second power supply devices based on a first reference phase, until the relative ripple between the output voltage ripple of one of the second power supply devices and the output voltage ripple of the first power supply device is minimized. Based on a second reference phase, sequentially adjust the fundamental phase of the ripple of the output voltage of each unadjusted second power supply device until the relative ripple between the output voltage ripple of all second power supply devices and the output voltage ripple of the power supply device corresponding to the second reference phase is minimized. Wherein, each time the fundamental phase of the ripple of the unadjusted second power supply device is adjusted, the second reference phase is determined based on the first reference phase and the fundamental phase of the ripple of the adjusted second power supply device.

[0007] In the above technical solution, the main control device first performs preliminary adjustment of the fundamental phase of the ripple of the output voltage of multiple second power supply devices based on the first reference phase, so that the relative ripple between the output voltage ripple of one of the second power supply devices and the first power supply device is minimized. Then, based on the second reference phase, the second power supply devices that have not been adjusted are adjusted in sequence to ensure that the relative ripple between the output voltage ripple of all the second power supply devices and the output voltage ripple of the corresponding power supply device is minimized, effectively reducing the mutual interference of the ripple of each power supply device, thereby improving the stability of the relative ripple between the output voltage ripple of multiple power supply devices.

[0008] In one possible implementation, the second reference phase is equal to the first reference phase; or, the second reference phase is the fundamental phase of the ripple of the output voltage of the second power supply device after the last adjustment.

[0009] In the above technical solution, the second reference phase can be equal to the first reference phase, or the second reference phase can be the fundamental phase of the output voltage ripple of the second power supply device after the previous adjustment. This flexible phase setting can accurately adapt to the needs of different adjustment stages.

[0010] In one possible implementation, the power supply device includes a memory; the second power supply device, after adjustment, is further configured to store the phase difference between the fundamental phase of the ripple of the output voltage and the fundamental phase of the ripple of the output voltage of the first power supply device in the memory. Upon power-on of the second power supply device after power-off, the output voltage is generated based on the phase difference stored in the memory.

[0011] In the above technical solution, the memory stores the phase offset amount corresponding to the phase offset command. When the second power supply device, after adjustment, is powered off and then powered on again, it can automatically read from the memory and restore the original phase offset setting, eliminating the need for the main control device to make repeated adjustments. This avoids the repeated phase optimization process after the power supply device restarts, ensuring that multiple power supply devices can quickly return to a stable state with minimal ripple.

[0012] In one possible implementation, the master control device is specifically configured to adjust the fundamental phase of the ripple of the output voltage of one or more second power supply devices by a preset step size during the process of adjusting the phase of the fundamental ripple of the output voltage of one or more second power supply devices.

[0013] In the above technical solution, the main control device adjusts the fundamental phase of the ripple of the second power supply device with a preset step size, which can accurately control the adjustment amplitude and avoid the problem of low adjustment efficiency caused by the adjustment amount being too small or too small due to inappropriate adjustment amount.

[0014] In one possible implementation, each power supply device includes a synchronization signal processing circuit, a first controller, and a power conversion circuit. The synchronization signal processing circuit is connected to both the main control device and the first controller, and the power conversion circuit is connected to the first controller. The synchronization signal processing circuit receives a synchronization signal output from the main control device, performs at least one of filtering, shaping, and level conversion on the synchronization signal to obtain a target signal, and outputs the target signal to the first controller. The first controller outputs a first pulse width modulation (PWM) signal to the power conversion circuit based on the target signal. The rising edge of the first PWM signal is synchronized with the rising edge of the target signal, and the switching frequency of the first PWM signal is N times the switching frequency of the target signal, where N is a positive rational number. The power conversion circuit generates an output voltage based on the first PWM signal, and the first pulse width modulation signal is used to indicate the fundamental phase and fundamental frequency of the output voltage ripple.

[0015] In the above technical solution, the synchronization signal processing circuit in the power supply device filters, shapes, or performs level conversion on the received synchronization signal, effectively suppressing noise and distortion during signal transmission and outputting a stable and reliable target signal, thereby ensuring the consistency of the operating frequency and anti-interference capability of each power supply device. Furthermore, the first controller in the power supply device outputs a PWM signal with a switching frequency N times that of the target signal, allowing the power supply device to flexibly adapt to different switching frequency requirements to meet its operating frequency needs. Moreover, the first controller in the power supply device maintains synchronization between the rising edge of the first PWM signal and the synchronization signal, providing a precise and reliable timing basis for multiple power supply devices. The power conversion circuit regulates the switching action based on the first PWM signal to generate the output voltage, so that the ripple characteristics of the output voltage are determined by the synchronization characteristics of the first PWM signal, improving the relative ripple stability between the output voltages of multiple power supply devices.

[0016] In one possible implementation, the main control device includes a synchronization signal generation circuit and a second controller, with the synchronization signal generation circuit connected to both the synchronization signal processing circuit and the second controller. The second controller is used to output an enable signal to the synchronization signal generation circuit. The synchronization signal generation circuit is used to output a synchronization signal to the synchronization signal processing circuit in response to the enable signal.

[0017] In the above technical solution, the second controller of the main control equipment outputs an enable signal to the synchronization signal generation circuit of the main control equipment, so that after receiving the enable signal, the synchronization signal generation circuit outputs a synchronization signal to the synchronization signal processing circuit in the power supply equipment, providing a frequency reference and a phase reference for multiple power supply equipment, thereby providing a stable and reliable timing basis for the power supply of multiple power supply equipment.

[0018] In one possible implementation, the second controller is further configured to output a phase offset command to the first controller in one or more second power supply devices during the process of adjusting the fundamental phase of the ripple of the output voltage of one or more second power supply devices. The first controller of the one or more second power supply devices is configured to output a second PWM signal to the power conversion circuit based on the phase offset amount corresponding to the phase offset command and the first PWM signal.

[0019] In the above technical solution, the second controller outputs a phase offset command to regulate the phase of the first PWM signal of one or more second power supply devices, generating a second PWM signal with a specific phase offset. The power conversion circuit adjusts its switching action according to the second PWM signal, changing the fundamental phase of the output voltage ripple, thereby realizing the fundamental phase adjustment of the output voltage ripple of one or more power supply devices, and thus reducing the relative ripple of the output voltage between each power supply device.

[0020] In one possible implementation, the synchronization signal generation circuit and the synchronization signal processing circuit are connected via a synchronization bus, and the first controller and the second controller are connected via a communication bus.

[0021] In the above technical solution, a synchronous bus is used to transmit pulse signals, providing each power supply device with a consistent and accurate frequency and phase reference. This ensures the synchronization of the switching frequencies of the PWM signals of each power supply device, thereby synchronizing the fundamental frequency of the output voltage ripple. Furthermore, a communication bus is used to transmit phase offset commands, achieving physical separation between the synchronization signal and the phase offset command. This ensures real-time performance while improving system reliability and wiring simplicity. Thus, this dual-bus architecture reduces system complexity and implementation cost while ensuring the accuracy of signal transmission.

[0022] In one possible implementation, the synchronization signal processing circuit is integrated in the first controller, the synchronization signal generation circuit is integrated in the second controller, and the first controller and the second controller are connected via an optical fiber link or a network cable link.

[0023] In the above technical solution, by integrating the synchronization signal processing circuit into the first controller and the synchronization signal generation circuit into the second controller, and connecting the first controller and the second controller with an optical fiber link or a network cable link, it is possible to transmit the synchronization signal and the corresponding phase adjustment command through the same physical bus, thereby simplifying the circuits of the main control device and the power supply device.

[0024] In one possible implementation, the power supply device is further configured to, when detecting that the frequency of the first switching cycle synchronization signal is outside a preset frequency range, control the switching frequency of the first switching cycle of the PWM signal to be the same as the switching frequency of the second switching cycle, wherein the second switching cycle is prior to the first switching cycle, and the frequency of the second switching cycle synchronization signal is within a preset frequency range.

[0025] In the above technical solution, when the power supply device detects that the frequency of the synchronization signal is outside the preset frequency range, that is, the synchronization signal is abnormal, the switching frequency of the PWM signal is maintained at the normal switching cycle switching frequency to continue working. This avoids sudden changes in system frequency caused by abnormal synchronization signal, improves the continuity and stability of power supply output of the power supply system, and thus improves the robustness of the power supply system under complex operating conditions.

[0026] Secondly, this application provides a power supply device, which is a second power supply device in any of the power supply systems described in the first aspect, and is used to connect to a main control device in the power supply system. The power supply device is used to receive a synchronization signal output by the main control device, generate an output voltage, wherein the fundamental frequency of the ripple of the output voltage is M times the frequency of the synchronization signal, and the phase of the fundamental ripple of the output voltage is based on the pulse edge of the synchronization signal, where M is a positive rational number. The power supply device is also used to adjust the phase of the fundamental ripple of the output voltage to minimize the relative ripple between the fundamental ripple of the output voltage of the power supply device and the fundamental ripple of the output voltage of the first power supply device in the power supply system.

[0027] Thirdly, this application provides a power supply system comprising a power supply system as described in any of the first aspects and a load, wherein the power supply system is connected to the load. The power supply system is used to supply power to the load.

[0028] The descriptions of the second and third aspects in this application can be referenced to the detailed description of the first aspect; and the beneficial effects of the second and third aspects can be referenced to the analysis of the beneficial effects of the first aspect, which will not be repeated here. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the composition of a power supply system provided in an embodiment of this application;

[0031] Figure 2 A schematic diagram of the output voltage ripple provided in an embodiment of this application;

[0032] Figure 3 A schematic diagram of a power supply system provided in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of another power supply system provided in an embodiment of this application;

[0034] Figure 5 This is a schematic diagram of another power supply system provided in an embodiment of this application;

[0035] Figure 6 A timing diagram of a signal provided in an embodiment of this application;

[0036] Figure 7This is a schematic diagram of another power supply system provided in an embodiment of this application;

[0037] Figure 8 This is a schematic diagram of another power supply system provided in an embodiment of this application;

[0038] Figure 9 This is a flowchart illustrating a control method provided in an embodiment of this application.

[0039] Figure label:

[0040] 1-Power supply system; 11-Power supply system; 12-Load; 111-Power supply equipment; 112-Power supply equipment; 11K-Power supply equipment;

[0041] 2-Power supply system; 21-Main control equipment; 22-Power supply equipment; 211-Synchronization signal generation circuit; 212-Second controller; 221-First power supply equipment; 222-Second power supply equipment; 2211-Synchronization signal processing circuit; 2212-First controller; 2213-Power conversion circuit; 2221-Synchronization signal processing circuit; 2222-First controller; 2223-Power conversion circuit;

[0042] 3-Power supply system. Detailed Implementation

[0043] The following sections will discuss the fabrication and use of various embodiments in detail. However, it should be understood that many applicable inventive concepts provided in this application can be implemented in a variety of specific environments. The specific embodiments discussed are merely illustrative of specific ways of implementing and using this description and technology, and do not limit the scope of this application.

[0044] Unless otherwise defined, all technical terms used herein have the same meaning as commonly known to one of ordinary skill in the art.

[0045] Each circuit or other component may be described or referred to as "for" performing one or more tasks. In this context, "for" is used to imply a structure by indicating that the circuit / component includes a structure (e.g., a circuit system) that performs one or more tasks during operation. Therefore, even when the specified circuit / component is currently inoperable (e.g., not turned on), it can still be referred to as "for performing that task." Circuits / components used with the term "for" include hardware, such as circuits that perform operations.

[0046] The technical solutions in the embodiments of this application will be described below with reference to the accompanying drawings. In this application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c can be single or multiple. In addition, in the embodiments of this application, the words "first," "second," etc., do not limit the quantity or order.

[0047] In this application, the terms "first," "second," etc., do not limit the quantity or order. In this application, the words "exemplary" or "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of "exemplary" or "for example," etc., is intended to present the relevant concepts in a concrete manner.

[0048] Before introducing the embodiments of this application, the technical terms and application scenarios involved in this application will be introduced first.

[0049] Ripple: An unwanted frequency AC voltage component in the output voltage waveform of a switching power supply device, such as the AC voltage superimposed on the output capacitor by the AC current generated by the switching modulation of the switching transistors in the switching power supply device. In the embodiments of this application, the switching power supply may be simply referred to as a "power supply device".

[0050] Beat frequency: Due to the difference in switching frequencies of two or more power supply devices, the ripple of their output voltages periodically superimposes and cancels out at the load device, resulting in a low-frequency oscillation phenomenon where the total ripple amplitude sometimes increases and sometimes decreases.

[0051] Jitter: In PWM control of a switching power supply, the pulse edge exhibits unstable variations within a certain range due to factors such as power supply, clock, and comparison level.

[0052] Figure 1 This is a schematic diagram illustrating the composition of a power supply system 1 provided in an embodiment of this application. For example... Figure 1As shown, the power supply system 1 includes a power supply system 11 and a load 12. The power supply system 11 includes multiple power supply devices, such as... Figure 1 The power supply devices 111, 112, ..., 11K are shown, where K is a positive integer. Multiple power supply devices supply power to load 12, thus meeting the multi-channel power supply needs of load 12. The power supply system can be various electronic devices, such as communication equipment, semiconductor equipment, or industrial control equipment.

[0053] In some possible implementations, the load includes multiple sub-loads, wherein a power supply device supplies power to one of the sub-loads of a load 12.

[0054] In the embodiments of this application, Figure 2 This is a schematic diagram of the output voltage ripple provided in an embodiment of this application. Figure 2 Taking the output voltage ripple of two power supply devices as an example, Figure 2 The horizontal axis represents time, and the vertical axis represents voltage. Figure 2 In Figure (a), the waveform of the output voltage ripple of the first power supply device changes over time when the fundamental frequency is 1.2 kHz. Figure 2 (b) shows the waveform of the output voltage ripple of the second power supply device as a function of time when the fundamental frequency is 1kHz. Figure 2 In diagram (c), the waveform shows the relative ripple over time between the output voltages of the first and second power supply devices. Figure 2 It can be seen that due to the difference in the fundamental frequency and fundamental phase of the output voltage ripple of the two power supply devices, a beat frequency phenomenon occurs between the relative waveforms of the output voltages of the two power supply devices. Specifically, when the fundamental phases of the two power supply devices are the same, the relative ripple between the output voltage ripples of the two power supply devices is the smallest. When the fundamental phases of the two power supply devices are opposite, the relative ripple between the output voltage ripples of the two power supply devices is the largest. Moreover, as time goes by, the relative ripple will repeatedly fluctuate between the maximum and minimum values, making the relative ripple unstable. This results in unstable power supply ripple received by the load, affecting the normal operation of the load.

[0055] In one possible implementation, Figure 3 This is a schematic diagram illustrating the composition of a power supply system 11 provided in an embodiment of this application. Figure 3As shown, the power supply system 11 may further include a main controller A. The main controller A is used to send synchronization signals to multiple power supply devices, so that the PWM signals of power supply devices 111, 112, ..., 11K each have the same switching frequency. Furthermore, the main controller A is also used to control the phases of the PWM signals of the multiple power supply devices to be the same, or to control the phases of the PWM signals of the multiple power supply devices to be staggered by a preset angle. However, this method does not optimize the adjustment of the voltage output ripple of the multiple power supply devices, and cannot maintain the relative ripple between the output voltages of the multiple power supply devices at a minimum, thus reducing the stability of the relative ripple.

[0056] In another possible embodiment, in an uninterruptible power supply (UPS) or photovoltaic inverter, frequency synchronization and phase adjustment at 50 Hz or 60 Hz are achieved by tracking and locking the AC voltage frequency, ensuring that active and reactive circulating currents are minimized. However, this method does not involve synchronizing the switching frequency in the UPS or photovoltaic inverter. Even if frequency synchronization is required, there is no need to optimize the ripple phase of the output voltage. Therefore, this method does not require phase control of the output voltage ripple of each power supply device, and thus lacks phase optimization of the waveform, making it impossible to maintain the relative ripple between the output voltages of multiple power supply devices at a minimum.

[0057] Based on this, this application provides a power supply system that, through a synchronization signal output by a master control device, ensures that the fundamental frequency of the output voltage ripple of multiple power supply devices is consistent, effectively eliminating the beat frequency phenomenon between the ripples of each power supply device. This improves the relative ripple stability between the output voltage ripples of multiple power supply devices. Furthermore, the synchronization signal output by the master control device provides a phase reference for the fundamental phase of the output voltage ripple of multiple power supply devices, laying the foundation for subsequent fundamental phase adjustment of the output voltage. Additionally, the master control device receives a phase adjustment command from the load output, determines a first reference phase of the first power supply device, and adjusts the fundamental phase of the output voltage of one or more second power supply devices to minimize the relative ripple between the output voltage ripple of the one or more second power supply devices and the output voltage ripple of the first power supply device. This reduces the relative ripple between the output voltage ripples of each power supply device, further improving the relative ripple stability between the output voltages of multiple power supply devices.

[0058] Example 1

[0059] Figure 4 This is a schematic diagram illustrating the composition of another power supply system 2 provided in an embodiment of this application. For example... Figure 4As shown, the power system 2 includes a main control device 21 and multiple power supply devices 22. The main control device 21 is connected to the multiple power supply devices 22, and the multiple power supply devices 22 are also used to connect to the load 12. The main control device 21 is used to output a synchronization signal to the multiple power supply devices 22. Each power supply device 22 is used to generate an output voltage in response to the synchronization signal. The fundamental frequency of the ripple of the output voltage is M times the frequency of the synchronization signal, and the fundamental phase of the ripple of the output voltage is based on the pulse edge of the synchronization signal. M is a positive rational number. In practice, in order to facilitate hardware implementation, it can be a positive integer (such as a positive integer within 1-10), or a fraction of a positive integer, such as 1 / 2 or 1 / 4.

[0060] The main control device 21 sends synchronization signals to multiple power supply devices 22 at preset time intervals. Each power supply device 22 generates an output voltage based on the frequency of the synchronization signal and the pulse edge of the synchronization signal, so that the fundamental frequency of the ripple of the output voltage of the multiple power supply devices 22 is consistent, effectively eliminating the beat frequency phenomenon between the ripples of each power supply device 22.

[0061] In one possible implementation, the pulse edge of the synchronization signal can be either the rising edge or the falling edge of the synchronization signal. For example, the pulse edge of the synchronization signal can be the rising edge of the synchronization signal to provide a reference for the fundamental phase adjustment of the subsequent ripple.

[0062] In one possible implementation, see Figure 4 The main control device 21 is also used to receive phase adjustment commands output by the load 12 and determine a first reference phase. The first reference phase is the fundamental phase of the ripple of the output voltage of any one of the multiple power supply devices 22. The power supply device corresponding to the first reference phase is the first power supply device 221, and the power supply devices other than the first power supply device 221 among the multiple power supply devices 22 are the second power supply devices 222. The main control device 21 is also used to adjust the fundamental phase of the output voltage of one or more second power supply devices 222 based on the first reference phase, so as to minimize the relative ripple between the ripple of the output voltage of one or more second power supply devices 222 and the ripple of the output voltage of the first power supply device 221. Figure 4 Two examples of the second power supply device 222 are provided. This application does not limit the specific value of the second power supply device 222.

[0063] In this embodiment, the load 12 monitors the ripple of the output voltage of each power supply device 22 to determine whether the fundamental phase of the ripple of the output voltage of each power supply device 22 needs adjustment. For example, if the fundamental phase of the ripple of the output voltage of each second power supply device 222 needs adjustment, the load 12 outputs a phase adjustment command to the main control device 21 to instruct the main control device 21 to adjust the fundamental phase of the ripple of the output voltage of each second power supply device 222. After each adjustment of each second power supply device 222 is completed, the load 12 will re-detect whether the fundamental phase of the ripple of the output voltage of the second power supply device 222 needs adjustment. If adjustment is required, the load 12 continues to output a phase adjustment command to the main control device 21, and the main control device 21 adjusts the fundamental phase of the ripple of the output voltage of the second power supply device 222 that needs adjustment until the relative ripple between the output voltage ripple of one or more second power supply devices 222 and the output voltage ripple of the first power supply device 221 is minimized, thus completing the adjustment. Here, the process of adjusting the fundamental phase of the output voltage ripple of the second power supply device 222 can also be called phase optimization.

[0064] In one possible implementation, one or more second power supply devices 222 include a plurality of second power supply devices 222. The main control device 21 is specifically configured to: adjust the fundamental phase of the ripple of the output voltage of the plurality of second power supply devices 222 based on a first reference phase, until the relative ripple between the output voltage ripple of one of the second power supply devices 222 and the output voltage ripple of the first power supply device 221 is minimized. Based on a second reference phase, the fundamental phase of the ripple of the output voltage of each unadjusted second power supply device 222 is sequentially adjusted until the relative ripple between the output voltage ripple of all second power supply devices 222 and the output voltage ripple of the power supply device corresponding to the second reference phase is minimized. Each time the fundamental phase of the ripple of an unadjusted second power supply device 222 is adjusted, the second reference phase is determined based on the first reference phase and the fundamental phase of the adjusted output voltage ripple of the second power supply device 222.

[0065] For example, the master control device 21 uses the fundamental phase of the ripple of the output voltage of the first power supply device 221 as the first reference phase, and performs the same phase adjustment on multiple second power supply devices 222. For instance, the fundamental phase of the ripple of the output voltage of multiple second power supply devices 222 is adjusted in the same phase length. If the master control device 21 receives feedback information from the load 12 and determines that the relative ripple between the output ripple of the first power supply device 221 and one of the second power supply devices 222 is the minimum, then the adjustment of that second power supply device 222 is complete. Then the master control device 21 adjusts the second power supply devices 222 that have not yet been adjusted until the relative ripple between the output voltage ripple of all the second power supply devices 222 and the output voltage ripple of the power supply device corresponding to the second reference phase is small.

[0066] In this way, the main control device 21 first performs preliminary adjustment of the fundamental phase of the ripple of the output voltage of multiple second power supply devices 222 based on the first reference phase, so that the relative ripple between the output voltage ripple of one of the second power supply devices 222 and the first power supply device 221 is minimized. Then, based on the second reference phase, the second power supply devices 222 that have not been adjusted are adjusted in sequence to ensure that the relative ripple between the output voltage ripple of all the second power supply devices 222 and the output voltage ripple of the corresponding power supply device is minimized, effectively reducing the mutual interference of the ripple of each power supply device 22, thereby improving the stability of the relative ripple between the output voltage ripple of multiple power supply devices 22.

[0067] In one possible implementation, the second reference phase is equal to the first reference phase.

[0068] The second reference phase can be the fundamental phase of the ripple of the output voltage of the first power supply device 221. Since the fundamental phase of the ripple of the output voltage of the unadjusted second power supply device 222 is also adjusted accordingly during the adjustment of the previously adjusted second power supply device 222, when adjusting the unadjusted second power supply device 222, the difference between the fundamental phases of the previously adjusted second power supply device 222 and the first power supply device 221 is added to the first reference phase when calculating the phase step of the unadjusted second power supply device 222 relative to the first power supply device. The phase step of the fundamental phase of the unadjusted second power supply device 222 and the first power supply device is then calculated to adjust the unadjusted second power supply device 222.

[0069] In another possible implementation, the second reference phase is the fundamental phase of the ripple of the output voltage of the second power supply device after the last adjustment.

[0070] Specifically, the fundamental phase of the ripple of the output voltage of the second power supply device 222 that was previously regulated is used as the second reference phase to calculate the phase step of the fundamental phase that needs to be adjusted between the unregulated second power supply device 222 and the regulated second power supply device 222, so as to adjust the unregulated second power supply device 222.

[0071] In this way, the second reference phase can be equal to the first reference phase, or the second reference phase can be the fundamental phase of the output voltage ripple of the second power supply device 222 after the last adjustment. This flexible phase setting can accurately adapt to the needs of different adjustment stages.

[0072] In one embodiment, the master control device 21 is specifically used to adjust the fundamental phase of the ripple in the output voltage of one or more second power supply devices 222 by a preset step size during the process of adjusting the phase of the fundamental ripple in the output voltage of one or more second power supply devices 222. The preset step size is the phase step size that the second power supply device 222 needs to adjust.

[0073] For example, the preset step size is 10 degrees, the phase adjustment range of the second power supply device 222 is 0~360 degrees, and the main control device 21 adjusts one or more second power supply devices 222 with a phase step size of 10 degrees by means of feedback information from the load 12.

[0074] In another example, the preset step size is 1 degree, and the second reference phase is the fundamental phase of the ripple of the output voltage of the second power supply device 222 after the last adjustment. Within a range of ±10 degrees based on the second reference phase, the unadjusted second power supply device 222 is adjusted.

[0075] In this way, the main control device 21 adjusts the fundamental phase of the ripple of the second power supply device 222 with a preset step size, which can accurately control the adjustment amplitude and avoid the problem of low adjustment efficiency caused by the adjustment amount being too small or too small due to inappropriate adjustment amount.

[0076] In one possible implementation, each power supply device 22 includes a memory; the regulated second power supply device 222 is further configured to store the phase difference between the fundamental phase of the ripple of the output voltage and the fundamental phase of the ripple of the output voltage of the first power supply device 221 in the memory. Upon power-on after the regulated second power supply device 222 has been powered off, the output voltage is generated based on the phase difference stored in the memory.

[0077] In this way, the memory stores the phase offset amount corresponding to the phase offset command. When the second power supply device 222, after adjustment, is powered off and then powered on again, it can automatically read from the memory and restore the original phase offset setting without the need for the main control device to make repeated adjustments. This avoids the repeated phase optimization process after the power supply device restarts, ensuring that multiple power supply devices 22 can quickly return to a stable state with minimal ripple.

[0078] It should be noted that if the power supply requirements of load 12 change (e.g., adding power to a sub-load), load 12 will trigger the power system to re-execute the complete phase optimization process, thereby ensuring that the power system can achieve optimal ripple suppression under any operating condition. Alternatively, the phase optimization process can also be initiated by the user, without any restrictions.

[0079] The power system 2 provided in this application embodiment, through the synchronization signal output by the main control device, enables the fundamental frequency of the output voltage ripple of multiple power supply devices to be consistent, effectively eliminating the beat frequency phenomenon between the ripples of each power supply device, thereby improving the relative ripple stability between the output voltage ripples of multiple power supply devices. Furthermore, the synchronization signal output by the main control device provides a phase reference for the fundamental phase of the output voltage ripple of multiple power supply devices, providing a basis for subsequent fundamental phase adjustment of the output voltage. In addition, the main control device receives the phase adjustment command output by the load, determines the first reference phase of the first power supply device, and adjusts the fundamental phase of the output voltage of one or more second power supply devices to minimize the relative ripple between the output voltage ripple of one or more second power supply devices and the output voltage ripple of the first power supply device, thereby reducing the relative ripple between the output voltage ripples of each power supply device and further improving the relative ripple stability between the output voltages of multiple power supply devices.

[0080] Example 2

[0081] In one possible implementation, Figure 5 This is a schematic diagram illustrating the composition of another power supply system 2 provided in an embodiment of this application. For example... Figure 5 As shown, each power supply device 22 includes a synchronization signal processing circuit, a first controller, and a power conversion circuit. Specifically, the first power supply device 221 includes a synchronization signal processing circuit 2211, a first controller 2212, and a power conversion circuit 2213, and each second power supply device 222 includes a synchronization signal processing circuit 2221, a first controller 2222, and a power conversion circuit 2223.

[0082] In each power supply device 22, a synchronization signal processing circuit 2211 is connected to both the main control device 21 and the first controller. The synchronization signal processing circuit 2211 receives the synchronization signal output from the main control device 21, performs at least one of filtering, shaping, and level conversion on the synchronization signal to obtain a target signal, and outputs the target signal to the first controller. The first controller outputs a first PWM signal to the power conversion circuit based on the target signal. The rising edge of the first PWM signal is synchronized with the rising edge of the target signal, and the switching frequency of the first PWM signal is N times the frequency of the target signal, where N is a positive rational number. For example, N can be a positive integer fraction, such as 1, one-half, or one-third, thus facilitating hardware implementation.

[0083] In each power supply device 22, the synchronization signal processing circuit performs one or more processing steps on the synchronization signal, including filtering, shaping, and level conversion, to output a target signal that eliminates high-frequency noise, improves transformer characteristics, and adapts to the operating voltage of the first controller. For example, the synchronization signal processing circuit tracks and locks the frequency and phase of the synchronization signal, and performs average filtering on the rising edge jitter of the synchronization signal to maintain frequency stability and consistency. This effectively suppresses noise and distortion during signal transmission and outputs a stable and reliable target signal, thereby ensuring the consistency of the operating frequency and anti-interference capability of each power supply device.

[0084] Furthermore, the first controller maintains synchronization between the rising edge of the first PWM signal and the rising edge of the target signal, providing a precise and reliable timing basis for multiple power supply devices. That is, the power conversion circuit regulates the switching action to generate the output voltage based on the first PWM signal, so that the ripple characteristics of the output voltage are determined by the synchronization characteristics of the first PWM signal. Moreover, the first controller in each power supply device 22 uses a first PWM signal whose output switching frequency is N times the switching frequency of the target signal, allowing the power supply device to flexibly adapt to different switching frequency requirements. For example, the first controller can perform frequency multiplication or division processing on the synchronization signal, enabling the power supply device to flexibly adapt to different switching frequency requirements to meet the operating frequency requirements of the power supply device.

[0085] In one possible implementation, the power conversion circuit includes a DC-DC converter or an AC-DC converter for converting electrical energy. Specifically, it can be a push-pull power conversion circuit, a full-bridge power conversion circuit, or another type of power conversion circuit. The power conversion circuit includes multiple switching transistors, which are driven by a first PWM signal to generate an output voltage.

[0086] In one possible implementation, the switching frequency and phase of the first PWM signal have a one-to-one correspondence with the fundamental frequency and phase of the output voltage ripple. Specifically, the fundamental frequency of the output voltage ripple is H times the switching frequency of the first PWM signal, where M can be the product of N and H. Furthermore, the phase of the first PWM signal also has a one-to-one correspondence with the fundamental frequency and phase of the output voltage ripple; specifically, the difference between the fundamental phase of the output voltage ripple and the phase of the first PWM signal is a preset difference. The values ​​of H and the preset difference are determined based on the specific circuit topology of the power conversion circuit, and this application does not impose any limitations on either.

[0087] In one possible implementation, see Figure 5 The main control device 21 includes a synchronization signal generating circuit 211 and a second controller 212. The synchronization signal generating circuit 211 is connected to both the synchronization signal processing circuit and the second controller 212. The second controller 212 is used to output an enable signal to the synchronization signal generating circuit 211. The synchronization signal generating circuit 211 is used to output a synchronization signal to the synchronization signal processing circuit in response to the enable signal.

[0088] In the main control device 21, the synchronization signal generation circuit 211 and the second controller 212 work together. The second controller 212 sends an enable signal to the synchronization signal generation circuit 211, and the synchronization signal generation circuit 211 outputs a synchronization signal after receiving the enable signal. This way, the synchronization function is activated only when needed to reduce power consumption and avoid interference from invalid signals. Furthermore, the main control device 21 outputs a synchronization signal to the synchronization signal processing circuit in the power supply device, providing a unified frequency and phase reference for multiple power supply devices 22, thereby providing a stable and reliable timing basis for the coordinated power supply of multiple power supply devices 22.

[0089] In one possible implementation, the second controller 212 is connected to the first controller of each power supply device 22. The second controller 212 is further configured to output a phase offset command to the first controller in one or more second power supply devices 222 during the process of adjusting the fundamental phase of the ripple of the output voltage of the one or more second power supply devices 222. The first controller of the one or more second power supply devices 222 is configured to output a second PWM signal to the power conversion circuit based on the phase offset amount corresponding to the phase offset command and the first PWM signal.

[0090] The phase offset command indicates the phase offset between the PWM signal of the first power supply and the first PWM signal of the second power supply. Furthermore, during the adjustment of the second power supply 222, the switching frequencies of the second PWM signal and the first PWM signal are the same.

[0091] In one possible implementation, the phase offset amount corresponding to the phase offset command is the preset step size mentioned above, as described in the above embodiment.

[0092] In one possible implementation, the first reference phase can be the phase of the PWM signal of the first power supply device; the second reference phase can also be the phase of the PWM signal of the first power supply device 221, or the PWM signal of the previously regulated second power supply device 222. Since there is a one-to-one correspondence between the fundamental phase of the output voltage ripple and the phase of the PWM signal, using the PWM phase to replace the first and second reference phases enables the power conversion circuit to control the switching transistors to turn on and off via the PWM signal to generate the output voltage.

[0093] In the embodiments of this application, Figure 6 This is a timing diagram illustrating a signal provided in an embodiment of this application. The timing diagram demonstrates the synchronization and phase adjustment mechanism of the synchronization signal and PWM signal in this embodiment. The synchronization signal serves as a unified timing reference, simultaneously transmitted to all power supply devices. The PWM signal of the first power supply device is strictly aligned with the synchronization pulse at its rising edge, serving as the reference phase for the second power supply device. The PWM signal of the second power supply device, while maintaining the same switching frequency (same period), has a controllable optimal phase offset α relative to the PWM signal of the first power supply device at its rising edge. At the optimal phase offset α, the relative ripple between the two power supply devices is minimized, thereby improving the stability of the relative ripple between the output voltages of the multiple power supply devices 22 in the power system 2. Figure 6 Taking the example where the switching frequency of the PWM signals of the first and second power supply devices is half the frequency of the synchronization signal, the power supply devices can choose to divide or multiply the frequency of the synchronization signal according to their own operating frequency requirements to match the operating frequency of the power supply devices.

[0094] The power system 2 provided in this application embodiment has a second controller 212 that outputs a phase offset command to regulate the phase of the first PWM signal of one or more second power devices 222, generating a second PWM signal with a specific phase offset. The power conversion circuit adjusts its switching action according to the second PWM signal, changing the fundamental phase of the output voltage ripple, thereby achieving fundamental phase adjustment of the output voltage ripple of one or more second power devices 222, and thus reducing the relative ripple of the output voltage between each power device 22.

[0095] In one possible implementation, the synchronization signal generation circuit 211 and the synchronization signal processing circuit are connected via a synchronization bus, and the first controller and the second controller 212 are connected via a communication bus.

[0096] In this system, power supply system 2 employs a dual-bus architecture for signal management. The synchronization signal generation circuit 211 is connected to the synchronization signal processing circuits in each power supply device via a synchronization bus. This synchronization bus transmits pulse signals, providing each power supply device with an accurate frequency and phase reference, ensuring the synchronization of the switching frequencies of the PWM signals in each device, and thus synchronizing the fundamental frequency of the output voltage ripple. Furthermore, the first controller and second controller 212 in each power supply device are connected via a communication bus for transmitting phase offset commands and exchanging information. This achieves physical separation of the synchronization signal and the phase offset command, ensuring real-time performance while improving system reliability and wiring simplicity. Thus, this dual-bus architecture ensures accurate signal transmission while reducing the complexity and implementation cost of power supply system 2.

[0097] In one possible implementation, the synchronization signal generation circuit 211 and the synchronization signal processing circuits in each power supply device transmit the synchronization signal in the form of a single-ended or differential synchronization bus. For example, the synchronization signal is transmitted differentially, and multiple power supply devices 22 receive the synchronization signal using a differential-to-single-ended conversion method. This allows the power supply devices 22 to obtain timely and accurate phase and frequency information to provide output voltage to the load 12 and supply power to the load 12.

[0098] In one possible implementation, Figure 7 This is a schematic diagram illustrating the composition of another power supply system 2 provided in an embodiment of this application. (See attached diagram.) Figure 7 As shown, in each power supply device 22, the synchronization signal processing circuit is integrated into the first controller. In the main control device 21, the synchronization signal generation circuit 211 is integrated into the second controller 212. The first controller and the second controller 212 in each power supply device 22 are connected via an optical fiber link or a network cable link.

[0099] In this embodiment, by integrating the synchronization signal processing circuit into the first controller and the synchronization signal generation circuit 211 into the second controller 212, and connecting the first controller and the second controller with an optical fiber link (i.e., networking using optical fiber), or connecting the first controller and the second controller with a network link, the requirements for communication information transmission (i.e., phase offset command transmission) and synchronization signal transmission are met. This enables the synchronization signal and phase offset command to be transmitted through the same physical bus, simplifying the circuits of the main control device 21 and each power supply device.

[0100] Example 3

[0101] In one possible implementation, the power supply device 22 is further configured to, when detecting that the frequency of the synchronization signal of the first switching cycle is outside a preset frequency range, control the switching frequency of the first switching cycle of the PWM signal to be the same as the switching frequency of the second switching cycle, wherein the second switching cycle precedes the first switching cycle, and the frequency of the synchronization signal of the second switching cycle is within the preset frequency range. The preset frequency range characterizes the range between the upper and lower frequency limits of the synchronization signal, and is used to determine whether the synchronization signal is abnormal. If the frequency of the synchronization signal is within the preset frequency range, it indicates that the synchronization signal is not abnormal; otherwise, the synchronization signal is abnormal.

[0102] In one possible implementation, the power supply device 22 is further configured to record the switching frequency of the PWM signal corresponding to each switching cycle when the frequency of the synchronization signal is within a preset frequency range. Thus, after an abnormality occurs in the frequency of the synchronization signal in the first switching cycle, the power supply device 22 acquires the switching frequency of the PWM signal corresponding to a switching cycle (e.g., the second switching cycle) that precedes the first switching cycle and whose synchronization signal frequency is within a preset normal range, and controls the switching frequency of the PWM signal in the first switching cycle to be consistent with the switching frequency of the second switching cycle, thereby enabling the power supply system 2 to maintain stable operation when encountering temporary interference.

[0103] In one possible implementation, the power supply device 22 is also used to output an alarm signal when the frequency of the synchronization signal of the first switching cycle is detected to be within a preset frequency range. The alarm signal is used to send an alarm to the operation and maintenance personnel or the monitoring system to indicate that the synchronization signal is abnormal, so as to promptly investigate and handle the synchronization signal fault.

[0104] In one possible implementation, the power supply device 22 is further configured to output a PWM signal based on the synchronization signal of the third switching cycle, which is located after the first switching cycle, if the frequency of the synchronization signal of the third switching cycle is within a preset frequency range. Thus, after the first switching cycle, if the frequency of the synchronization signal of the third switching cycle is within the preset frequency range, the power supply device 22 switches back to frequency tracking mode, enabling the power system 2 to maintain stable operation when encountering temporary interference and quickly recover to its optimal operating state after the fault is cleared, thereby improving the fault tolerance and operational reliability of the power system 2.

[0105] This application provides a power supply system 2 that, when the frequency of the synchronization signal is outside the preset frequency range, for example, when the main control device 21 and the power supply device malfunction during the transmission of the synchronization signal, or when the main control device 21 malfunctions, or when the circuit in the power supply device that processes the synchronization signal malfunctions, causing the synchronization signal to malfunction, the switching frequency of the PWM signal is maintained at the normal switching cycle switching frequency to continue working. This avoids sudden changes in system frequency caused by the abnormal synchronization signal, improves the continuity and stability of the power supply output of the power supply system, and thus improves the robustness of the power supply system 2 under complex operating conditions.

[0106] Example 4

[0107] Based on the above embodiments, this application also provides a power supply device, which is the second power supply device 222 in the power supply system 2 described above. The power supply device is used to connect to the main control device in the power supply device. The power supply device is used to receive a synchronization signal output by the main control device, generate an output voltage, wherein the fundamental frequency of the ripple of the output voltage is M times the frequency of the synchronization signal, and the phase of the fundamental ripple of the output voltage is based on the pulse edge of the synchronization signal, where M is a positive rational number. The power supply device is also used to adjust the phase of the fundamental ripple of the output voltage to minimize the relative ripple between the fundamental ripple of the output voltage of the power supply device and the fundamental ripple of the output voltage of the first power supply device 221 in the power supply system 2.

[0108] Example 5

[0109] Based on the above embodiments, Figure 8 This is a schematic diagram illustrating the composition of another power supply system 3 provided in an embodiment of this application. The power supply system 3 includes a power system 2 as described in any of the above embodiments and a load 12, with the power system 2 connected to the load 12. The power system 2 is used to supply power to the load 12.

[0110] In one possible implementation, the load 12 is used to receive the supply voltage output by each power supply device in the power system 2. When the relative ripple between the output voltages of the first power supply device 221 and one or more second power supply devices 222 in the power system 2 is not at its minimum, the load 12 sends an intermediate phase adjustment command to the main control device 21 in the power system 2 to adjust the fundamental phase of the ripple of the output voltage of the second power supply device. This closed-loop control mechanism enables the power system to automatically lock the optimal ripple state to improve the stability of the relative ripple.

[0111] In addition, after the relative ripple between the supply voltages of each power supply device is minimized, the load 12 can trigger the phase optimization process to the power system 2 at a preset time interval, or the user can trigger the phase optimization process to the power system 2 as needed. This enables the power system 2 to periodically and automatically calibrate the phase configuration to adapt to dynamic factors such as changes in operating conditions.

[0112] In this embodiment, load 12 is a multi-powered load system. By synchronizing the frequencies of multiple power supply devices in power system 2 and performing phase optimization on one or more second power supply devices 222 in power system 2, the output voltage ripple caused by the beat frequency effect of multiple power supply devices can be effectively suppressed, providing a stable power supply voltage for the multi-powered load.

[0113] Example 6

[0114] Based on the above embodiments, Figure 9 This is a flowchart illustrating a control method provided in an embodiment of this application. The control method is applied in the power supply system 2 and power supply system 3 described above. The control method includes:

[0115] S901. The main control device outputs synchronization signals to multiple power supply devices.

[0116] S902. Multiple power supply devices generate output voltage based on a synchronization signal.

[0117] S903. The main control device receives the phase adjustment command from the load output and sends the phase offset command to one or more second power supply devices.

[0118] S904. One or more second power supply devices adjust the fundamental phase of the output voltage ripple based on a phase offset command.

[0119] The detailed description of the power supply equipment, power supply system 3 and control method, as well as the analysis of the beneficial effects, described above can be applied to power supply system 2. The embodiments of this application will not be repeated here.

[0120] Each of the above modules or units can be implemented through software, hardware, or a combination of both. For example, the first controller and the second controller can both be implemented based on software.

[0121] In this application, "implemented through software" means that the processor reads and executes program instructions stored in memory to implement the functions corresponding to the aforementioned modules or units. Here, the processor refers to a processing circuit capable of executing program instructions, including but not limited to at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller unit (MCU), or an artificial intelligence processor, etc., and other processing circuits capable of running program instructions. In other embodiments, the processor may also include circuits with other processing functions (such as hardware circuits for hardware acceleration, bus and interface circuits, etc.). The processor can be presented as an integrated chip, for example, as an integrated chip whose processing function only includes executing software instructions, or it can also be presented as a SoC (system on a chip), that is, on a single chip, in addition to the processing circuit capable of running program instructions (usually referred to as the "core"), it also includes other hardware circuits for implementing specific functions (of course, these hardware circuits can also be implemented separately based on ASIC or FPGA). Correspondingly, the processing functions, in addition to executing software instructions, may also include various hardware acceleration functions (such as AI calculation, encoding / decoding, compression / decompression, etc.).

[0122] In this application, "implemented in hardware" means that the functions of the above-mentioned modules or units are implemented through hardware processing circuits that do not have program instruction processing capabilities. These hardware processing circuits can be composed of discrete hardware components or integrated circuits. To reduce power consumption and size, integrated circuits are typically used. Hardware processing circuits can include ASICs (application-specific integrated circuits) or PLDs (programmable logic devices); PLDs can include FPGAs (field-programmable gate arrays), CPLDs (complex programmable logic devices), and so on. These hardware processing circuits can be a single packaged semiconductor chip (e.g., packaged as an ASIC); or they can be integrated with other circuits (e.g., CPUs, DSPs) and packaged into a single semiconductor chip. For example, multiple hardware circuits and a CPU can be formed on a silicon substrate and packaged into a single chip; this type of chip is also called a SoC. Alternatively, circuits for implementing FPGA functions and a CPU can be formed on a silicon substrate and encapsulated into a single chip; this type of chip is also called a SoPC (system on a programmable chip).

[0123] It should be noted that when this application is implemented through software, hardware, or a combination of both, different software or hardware can be used, and it is not limited to using only one type of software or hardware. For example, one module or unit can be implemented using a CPU, while another module or unit can be implemented using a DSP. Similarly, when implemented using hardware, one module or unit can be implemented using an ASIC, while another module or unit can be implemented using an FPGA. Of course, it is not limited to using the same software (e.g., all through a CPU) or the same hardware (e.g., all through an ASIC) to implement some or all modules or units. Furthermore, those skilled in the art will understand that software is generally more flexible but less performant than hardware, while hardware is the opposite. Therefore, those skilled in the art can choose software, hardware, or a combination of both based on actual needs.

[0124] The above-described preferred embodiments have further detailed the purpose, technical solutions, and advantages of this application. It should be understood that the above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power supply system, characterized in that, It includes a main control device and multiple power supply devices, wherein the main control device is connected to the multiple power supply devices, and the multiple power supply devices are also used to connect a load; The main control device is used to output synchronization signals to the multiple power supply devices; Each of the power supply devices is configured to generate an output voltage in response to a synchronization signal, wherein the fundamental frequency of the ripple of the output voltage is M times the frequency of the synchronization signal, and the fundamental phase of the ripple of the output voltage is referenced to the pulse edge of the synchronization signal, where M is a positive rational number. The main control device is further configured to receive the phase adjustment command output by the load, determine a first reference phase, wherein the first reference phase is the fundamental phase of the ripple of the output voltage of any of the plurality of power supply devices; the power supply device corresponding to the first reference phase is the first power supply device, and the power supply devices other than the first power supply device among the plurality of power supply devices are the second power supply devices. The main control device is further configured to adjust the fundamental phase of the ripple of the output voltage of one or more second power supply devices based on the first reference phase, so as to minimize the relative ripple between the ripple of the output voltage of one or more second power supply devices and the ripple of the output voltage of the first power supply device.

2. The power supply system according to claim 1, characterized in that, One or more second power supply devices include multiple second power supply devices; the main control device is specifically used for: Based on the first reference phase, the fundamental phase of the ripple of the output voltage of the plurality of second power supply devices is adjusted so that the relative ripple between the output voltage ripple of one of the second power supply devices and the output voltage ripple of the first power supply device is minimized. Based on the second reference phase, the fundamental phase of the ripple of the output voltage of each second power supply device that has not been adjusted is adjusted sequentially until the relative ripple between the output voltage ripple of all second power supply devices and the output voltage ripple of the power supply device corresponding to the second reference phase is minimized. Specifically, each time the fundamental phase of the ripple of the second power supply device that has not yet been adjusted is adjusted, the second reference phase is determined based on the first reference phase and the fundamental phase of the output voltage of the second power supply device that has been adjusted.

3. The power supply system according to claim 2, characterized in that, The second reference phase is equal to the first reference phase; or, the second reference phase is the fundamental phase of the ripple of the output voltage of the second power supply device after the last adjustment.

4. The power supply system according to claim 2 or 3, characterized in that, The power supply device includes a memory; The second power supply device, after adjustment, is further configured to store the phase difference between the fundamental phase of the ripple of the output voltage and the fundamental phase of the ripple of the output voltage of the first power supply device in the memory. And when the second power supply device is powered off and then powered on again after adjustment, the output voltage is generated based on the phase difference stored in the memory.

5. The power supply system according to claim 2 or 3, characterized in that, The main control device is specifically used to adjust the fundamental phase of the ripple of the output voltage of one or more second power supply devices by a preset step size during the process of adjusting the phase of the fundamental ripple of the output voltage of one or more second power supply devices.

6. The power supply system according to claim 2 or 3, characterized in that, Each of the power supply devices includes a synchronization signal processing circuit, a first controller, and a power conversion circuit. The synchronization signal processing circuit is connected to the main control device and the first controller, respectively, and the power conversion circuit is connected to the first controller. The synchronization signal processing circuit is used to receive the synchronization signal output by the main control device, perform at least one of filtering, shaping and level conversion on the synchronization signal to obtain the target signal, and output the target signal to the first controller; The first controller is configured to output a first pulse width modulation signal to the power conversion circuit according to the target signal, wherein the rising edge of the first pulse width modulation signal is synchronized with the rising edge of the target signal, and the switching frequency of the first pulse width modulation signal is N times the switching frequency of the target signal, where N is a positive rational number. The power conversion circuit is used to generate the output voltage according to the first pulse width modulation signal, wherein the first pulse width modulation signal is used to indicate the fundamental phase and fundamental frequency of the ripple of the output voltage.

7. The power supply system according to claim 6, characterized in that, The main control device includes a synchronization signal generation circuit and a second controller, wherein the synchronization signal generation circuit is connected to the synchronization signal processing circuit and the second controller respectively; The second controller is used to output an enable signal to the synchronization signal generating circuit; The synchronization signal generating circuit is used to output the synchronization signal to the synchronization signal processing circuit in response to the enable signal.

8. The power supply system according to claim 7, characterized in that, The second controller is further configured to output a phase offset command to the first controller in one or more of the second power supply devices during the process of adjusting the fundamental phase of the ripple of the output voltage of one or more of the second power supply devices. A first controller of one or more second power devices is configured to output a second pulse width modulation signal to the power conversion circuit based on the phase offset amount corresponding to the phase offset command and the first pulse width modulation signal.

9. The power supply system according to claim 7, characterized in that, The synchronization signal generation circuit and the synchronization signal processing circuit are connected via a synchronization bus, and the first controller and the second controller are connected via a communication bus.

10. The power supply system according to claim 7, characterized in that, The synchronization signal processing circuit is integrated in the first controller, the synchronization signal generation circuit is integrated in the second controller, and the first controller and the second controller are connected via an optical fiber link or a network cable link.

11. The power supply system according to claim 6, characterized in that, The power supply device is further configured to, when detecting that the frequency of the synchronization signal in the first switching cycle is outside a preset frequency range, control the switching frequency of the first switching cycle of the pulse width modulation signal to be the same as the switching frequency of the second switching cycle, wherein the second switching cycle is located before the first switching cycle, and the frequency of the synchronization signal in the second switching cycle is within the preset frequency range.

12. A power supply device, characterized in that, The power supply device is a second power supply device in the power supply system as described in any one of claims 1 to 11, and the power supply device is used to connect to the main control device in the power supply system; The power supply device is used to receive the synchronization signal output by the main control device and generate an output voltage. The fundamental frequency of the ripple of the output voltage is M times the frequency of the synchronization signal, and the phase of the fundamental frequency of the ripple in the output voltage is based on the pulse edge of the synchronization signal, where M is a positive rational number. The power supply device is further configured to adjust the phase of the ripple fundamental of the output voltage so as to minimize the relative ripple between the ripple fundamental of the output voltage of the power supply device and the ripple fundamental of the output voltage of the first power supply device in the power supply system.

13. A power supply system, characterized in that, Includes a power system and a load as described in any one of claims 1 to 11, wherein the power system is connected to the load and the power system is used to supply power to the load.

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