Power conditioning device, associated operating method and associated rack-mounted power supply system

Abstract

A rack-mounted power supply system is used for supplying power to a server through a power busbar. The rack-mounted power supply system comprises a power supply case and a power adjusting device. The power chassis is configured to receive an input power source and provide an output current to the power busbar such that the power busbar transmits a system current to power the server. The power conditioning device is configured to receive a busbar voltage signal from a power busbar. The power regulation device provides a first regulation current to the power busbar when a rate of change of drop of the busbar voltage signal exceeds a discharge threshold voltage threshold. When the rising change rate of the busbar voltage signal exceeds the charging critical voltage threshold value, the power regulation device receives the third regulation current from the power busbar. The invention further relates to a power regulation device and a power regulation operation method.

Description

Technical Field

[0001] The present invention relates to a power regulating device, a related operating method and a related rack-mounted power supply system, and more particularly to a power regulating device capable of dynamically regulating current according to load changes, a related operating method and a related rack-mounted power supply system. Background Art

[0002] With the advancement of artificial intelligence and high-performance computing, the power consumption of components such as graphics processing units (GPUs) and central processing units (CPUs) in servers is also increasing. To meet the growing demand for high-performance computing, server power supply systems must cope with higher power requirements, increased heat dissipation pressures, and more stable voltage control requirements. Furthermore, more intelligent power management systems are needed to ensure stable operation.

[0003] Servers typically use power supplies to convert AC or DC input power into the DC power required by the server. Large server centers are often equipped with uninterruptible power supply systems to cope with sudden power outages or voltage fluctuations, ensuring that data is not damaged and that there is sufficient time for backup or shutdown.

[0004] Because high-power consumption components in servers often experience rapid increases or decreases in power consumption, existing power supplies rapidly draw current from the input power supply to cope with these short-term, rapid load fluctuations. This causes ripple or voltage drops in the input power supply, generating unnecessary noise on the power supply network. If this phenomenon occurs simultaneously in multiple servers, it can cause instability in the entire power supply network and even cause other devices to stop operating or even be damaged. Summary of the Invention

[0005] Therefore, how to design a power regulation device, a related operating method and a related rack-mounted power supply system to solve the problems and technical bottlenecks existing in the prior art is an important topic studied by the inventors of the present disclosure.

[0006] An embodiment of a power conditioning device of the present invention is used to couple to a server and a power supply chassis via a power bus. The power conditioning device includes a control circuit, a charge-discharge circuit, and an energy storage unit. The control circuit is used to receive a bus voltage signal from the power bus, wherein the bus voltage signal is positively correlated with the current value of the output current generated by the power supply chassis. The charge-discharge circuit is coupled to the control circuit and receives a discharge enable signal or a charge enable signal generated by the control circuit. The energy storage unit is coupled to the charge-discharge circuit. When the control circuit determines that the falling rate of change of the bus voltage signal exceeds the discharge critical voltage threshold, the control circuit generates a discharge enable signal, causing the charge-discharge circuit to control the energy storage unit to provide a first regulating current to the power bus for power supply. When the control circuit determines that the rising rate of change of the bus voltage signal exceeds the charge critical voltage threshold, the control circuit generates a charge enable signal, causing the charge-discharge circuit to receive a third regulating current from the power bus to charge the energy storage unit.

[0007] An embodiment of a rack-mounted power supply system of the present invention is used to supply power to a server via a power bus. The rack-mounted power supply system includes a power supply chassis and a power conditioning device. The power supply chassis is used to receive input power and convert the input power to provide output current to the power bus, so that the power bus transmits system current to power the server. The power conditioning device is used to electrically connect to the power bus. The power conditioning device is used to receive a bus voltage signal from the power bus via a second signal line, wherein the bus voltage signal is positively correlated with the current value of the output current. When the power conditioning device determines that the falling rate of change of the bus voltage signal exceeds the discharge critical voltage threshold, the power conditioning device is used to provide a first regulated current to the power bus, and together with the power supply chassis, supplies power to the server. When the power conditioning device determines that the rising rate of change of the bus voltage signal exceeds the charge critical voltage threshold, the power conditioning device is used to receive a third regulated current from the power bus.

[0008] An embodiment of a power conditioning operation method according to the present invention is used to control a power conditioning device coupled to a server and a power supply chassis via a power bus. The method includes: the power conditioning device receiving a bus voltage signal from the power bus, wherein the bus voltage signal is positively correlated with the output current value generated by the power supply chassis; when the power conditioning device determines that the rate of change of the bus voltage signal decreases exceeds a critical discharge voltage threshold, the power conditioning device provides a first regulated current to the power bus for power supply; and when the power conditioning device determines that the rate of change of the bus voltage signal increases exceeds a critical charge voltage threshold, the power conditioning device receives a third regulated current from the power bus for charging.

[0009] In the aforementioned power conditioning device, related operating method and related rack-mounted power supply system, the power conditioning device can determine the server unloading condition based on the current command signal obtained from the power supply chassis: during the server unloading process, when the load change speed suddenly increases, causing the bus voltage signal's decreasing rate of change to be too large and / or the current command signal's increasing rate of change to be too large, the power conditioning device supplies power to the server; during the server unloading process, when the load change speed suddenly decreases, causing the bus voltage signal's increasing rate of change to be too large and / or the current command signal's decreasing rate of change to be too large, the power supply chassis charges the power conditioning device, thereby maintaining the power supply stability of the power supply chassis and its upstream power grid.

[0010] In order to further understand the technologies, means and technical effects adopted by the present invention to achieve the intended objectives, please refer to the following detailed description of the present invention and the accompanying drawings. It is believed that the objectives, features and characteristics of the present invention can be understood in depth and in detail. However, the accompanying drawings are provided for reference and illustration only and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG. 1 is a schematic diagram of an embodiment of a rack according to the present invention.

[0012] Figure 2 FIG. 4 is a block diagram of an embodiment of a rack-mounted power supply system according to the present invention.

[0013] Figure 3 FIG. 4 is a block diagram of another embodiment of a rack-mounted power supply system according to the present invention.

[0014] Figure 4 FIG. 4 is a block diagram of another embodiment of a rack-mounted power supply system according to the present invention.

[0015] Figure 5 FIG. 1 is a schematic diagram of an embodiment of the present invention in which a power supply chassis transmits a current command signal to a power conditioning device.

[0016] Figure 6 FIG. 1 is a circuit block diagram of an embodiment of a power supply unit and a power conditioning device of the present invention.

[0017] Figure 7 This is a waveform diagram of an embodiment of the charge and discharge control of the power conditioning device of the present invention.

[0018] Figure 8A FIG. 1 is a schematic diagram of another embodiment of a rack according to the present invention.

[0019] Figure 8B FIG. 4 is a block diagram of another embodiment of a rack-mounted power supply system according to the present invention.

[0020] Figure 8CFIG. 4 is a circuit block diagram of another embodiment of the power supply unit and the power conditioning device of the present invention.

[0021] Figure 9 for Figure 8C Waveform diagram of an embodiment of charging and discharging control of a power conditioning device.

[0022] Figure 10 for Figure 8C Waveform diagram of another embodiment of charging and discharging control of the power conditioning device.

[0023] Description of reference numerals:

[0024] 1, 1': rack

[0025] 10: Server

[0026] 1-1 to 1-N: Server

[0027] 20: Power supply chassis

[0028] 20-1,…,20-M: Power supply chassis

[0029] 2-1,…,2-P: Power supply unit

[0030] 30, 30': Power conditioning device

[0031] 50: Power bus

[0032] 100: First signal line

[0033] 110: Second signal line

[0034] 200: Rack-mounted power system

[0035] 300: Rack-mounted power system

[0036] 400: Rack-mounted power supply system

[0037] 210: Power conversion circuit

[0038] 220: Load signal generating circuit

[0039] 21: Resistors

[0040] 22: Gain element

[0041] 31: Noise filtering circuit

[0042] 33: Control circuit

[0043] 35: Charging and discharging circuit

[0044] 39: Energy storage unit

[0045] 111: AC-DC converter

[0046] V AC : AC input voltage

[0047] V DC : DC voltage

[0048] V PSU : Output voltage

[0049] I PSU : Output current

[0050] I SYS : System current

[0051] I PCS :Regulate current

[0052] I PCS1 : First regulation current

[0053] I PCS2 : Second regulation current

[0054] I PCS3 : The third regulating current

[0055] I PCS4 : The fourth regulating current

[0056] I share : Current command signal

[0057] V bus : Bus voltage signal

[0058] I th DCH : Discharge critical current threshold

[0059] I th_CHG : Charging critical current threshold

[0060] V th_DCH : Discharge critical voltage threshold

[0061] V th_CHG : Charging critical voltage threshold

[0062] DCH_EN: discharge enable signal

[0063] CHG_EN: Charging enable signal

[0064] R 21 : Resistance value DETAILED DESCRIPTION

[0065] The technical content and detailed description of the present invention are described as follows with reference to the accompanying drawings.

[0066] See Figure 1 FIG2 is a schematic diagram of an embodiment of a rack 1 according to the present invention. Rack 1 (or cabinet; rack) is a structure for mounting servers, power equipment, network equipment, and storage devices, and can be used in data centers or enterprise server rooms for high-density and scalable deployment.

[0067] like Figure 1 As shown in the embodiment of the present invention, a rack 1 is provided with a plurality of server units 1-1 to 1-N (N is a positive integer), a power shelf 20, and a power conditioning device 30, and the servers 1-1 to 1-N, the power shelf 20, and the power conditioning device 30 are electrically connected to a power bus 50 or other suitable power transmission conductors for power transmission. In addition, the power shelf 20 and the power conditioning device 30 are further connected via a physical first signal line 100, and the power shelf 20 transmits load information to the power conditioning device 30 via the first signal line 100. The server may include suitable circuit elements, such as a CPU, a GPU, a memory, a storage device, etc., which may provide one or more functions such as computing, storage, training, and inference. The power shelf 20 includes one or more power supply units (PSUs), and the one or more power supply units of the power shelf 20 may separately or collectively provide one or more functions such as power factor correction, AC-DC conversion, and DC-DC conversion.

[0068] exist Figure 1 In the embodiment, the servers 1-1 to 1-N, the power supply chassis 20, and the power conditioning device 30 can be implemented in rack units of the same or different sizes. In other embodiments, the configuration of the servers, power supply chassis, and power conditioning device can also vary based on different design considerations. For example, some servers in the rack can have one or more built-in power supply units, the rack can have no power supply chassis but power supply units can be installed in each server, the rack can have multiple power supply chassis, or the rack can have multiple power conditioning devices. In another embodiment in which multiple racks are connected in parallel to transmit power, the power supply chassis can be installed only in one or more racks, or the power conditioning device can be installed only in one or more racks. For example, the power supply chassis can be installed only in the first rack, and the servers can be installed in the second to M racks. The power supply chassis of the first rack can supply power to the second to M racks through a cross-rack power bus, and the power conditioning device can be installed in one or more racks from the first to M racks. Therefore, in an embodiment where multiple racks transmit power in parallel, at least one power supply chassis and at least one power conditioning device should be included, and they can be respectively arranged in the same or different racks.

[0069] Figure 2 The embodiment of FIG. 1 shows some components of a rack 1, which is a block diagram of a rack-mounted power supply system 200. The rack-mounted power supply system 200 includes a power bus 50, a power supply chassis 20, and a power conditioning device 30 for supplying power to the server 10. The server 10, the power supply chassis 20, and the power conditioning device 30 are all connected to the power bus 50. The power supply chassis 20 is coupled to an AC input power source to receive an AC input voltage V AC , and converts the AC input voltage V AC To provide output voltage V PSU And the output current I PSU The power is then fed to the power bus 50 to supply power to the server 10 .

[0070] The power supply chassis 20 provides an output current I PSU And correspondingly generate the current command signal I share and transmits the current command signal I share is transmitted to the power conditioning device 30. In one embodiment, the current command signal I share is the output current I PSU The current value of the signal is positively correlated, so that the power conditioning device 30 can provide the current command signal I share To estimate the load condition of the server 10. For example, when the current command signal I share When the signal value of is large, it means that the load of the server 10 is high and more power is consumed; when the current command signal I of the power supply chassis 20 is large, it means that the load of the server 10 is high and more power is consumed; share When the signal value of is small, it means that the load of the server 10 is low and less power is consumed. share The change rate of the signal value is relatively large, which means that the load of the server 10 increases or decreases rapidly.

[0071] like Figure 2 As shown in the embodiment, the power supply chassis 20 provides an output current I PSU To the power bus 50, the power bus 50 transmits the system current I SYS To the server 10 for supplying power to the server 10.

[0072] The power conditioning device 30 provides a regulated current I PCS to the power bus 50, or receive the regulated current I from the power bus 50 PCS The power conditioning device 30 can be based on the current command signal I shareThe load condition of the server 10 is estimated. When the load of the server 10 increases rapidly (the load increase per unit time exceeds a rising threshold), the power conditioning device 30 provides a regulated current I PCS To the power bus 50, and together with the power chassis 20 to power the server 10. For example, the system current I transmitted to the server 10 SYS =I PSU +I PCS When the load of the server 10 decreases rapidly (the load decrease per unit time exceeds a decrease threshold), the power conditioning device 30 may also receive the regulated current I from the power bus 50. PCS , to receive the excess current on the power bus 50. For example: the regulated current I PCS =I PSU -I SYS This allows the server 10 to adjust the current I by providing or receiving the current when the load increases or decreases in a short time. PCS , so that the output current I of the power supply chassis 20 PSU There is no need to increase or decrease the current quickly in a short time, so that the power supply chassis 20 does not need to increase or decrease the current drawn from its input power supply quickly, thereby maintaining the AC input voltage V AC and overall grid stability.

[0073] exist Figure 2 In the embodiment, only one of each element is shown for ease of illustration, and the number of each element can be set to one or more according to different requirements. For example, Figure 3 The embodiment of FIG. 1 shows another embodiment of some components of the rack 1, which is a block diagram of a rack-mounted power supply system 300. The server 10 of this embodiment may include multiple server units 1-1...1-N. In other embodiments, the power conditioning device 30 may also be provided in a plurality. The rack-mounted power supply system 300 includes a plurality of power supply chassis 20-1,...,20-M (M is a positive integer). The plurality of power supply chassis 20-1,...,20-M can be configured and controlled to supply power separately or simultaneously to provide an output current I PSU To the power bus 50, power is supplied to the server 10. For example, the system current I SYS It is set to the total current provided by one or more power supply chassis 20 and one or more power conditioning devices 30.

[0074] Figure 4 This is another embodiment of a rack-mounted power supply system. The rack-mounted power supply system 400 of this embodiment includes one or more power supply chassis 20-1, ..., 20-M (M is a positive integer), which is used to receive a DC voltage V from an AC-DC converter 111. DCAs an input signal. When the grid power supply is an AC signal, the AC-DC converter 111 is coupled between the AC input power source (such as the grid) and the power supply chassis 20-1, ..., 20-M. The AC-DC converter 111 is used to receive the AC input voltage V AC , and converts the AC input voltage V AC is the DC voltage V DC That is, the input power of the rack power system can be AC ​​input power or DC input power, and both can maintain the stability of the input power and the overall power grid.

[0075] See Figure 5 The embodiment of the present invention is that the power supply chassis 20 transmits the current command signal I share As mentioned above, the power supply chassis 20 provided in the rack 1 is connected to the power supply conditioning device 30 via a first signal line 100, whereby the power supply chassis 20 transmits a current command signal I through the first signal line 100. share To the power conditioning device 30. Figure 5 The illustrated power chassis 20 may include a plurality of removable power supply units 2-1, ..., 2-P (where P is a positive integer) that support cold and hot swap. For example, the power chassis 20 may include a plurality of power supply units that comply with appropriate specifications, such as the Open Compute Project Open Rack standard version 3 (OCP ORv3). In another embodiment, some or all of the power supply units in the power chassis 20 are configured to be non-removable.

[0076] Figure 6 The embodiment of FIG. 1 shows a circuit block diagram of an embodiment of a power chassis supply unit and a power conditioning device, which includes a power chassis 20 and a power conditioning device 30 . Figure 6 Only one power supply chassis 20 is used for the purpose of illustration. However, the configuration of one or more power supply chassis 20 with one or more power conditioning devices 30 can also be operated in the same or similar manner. The power supply chassis 20 in this embodiment includes a power conversion circuit 210 and a load signal generating circuit 220. The power conversion circuit 210 is coupled to an AC input power source to perform appropriate functions such as AC-DC conversion or DC-DC conversion to generate a corresponding output voltage V PSU And the output current I PSU The load signal generating circuit 220 is coupled to the output terminal of the power conversion circuit 210 and generates a load signal according to the output current I PSU The corresponding current command signal I share .

[0077] In this embodiment, the load signal generating circuit 220 includes a resistor 21 and a gain element 22. The resistor 21 is connected in series to the output path of the power conversion circuit 210. The voltage across the resistor 21 is equal to R 21 *I PSU , where R 21 The gain element 22 is coupled to both ends of the resistor 21 and generates a current command signal I according to the voltage across the resistor 21 and a suitable multiplication factor. share The magnification can be greater than or less than 0, and the absolute value of the magnification can be set to be greater than or less than 1 to provide a current command signal I in an appropriate signal format. share In other embodiments, other suitable circuit elements or detection mechanisms may be used to generate the current command signal I share , for example: using an inductor to sense the output current I PSU The current command signal I is generated accordingly. share .

[0078] The power conditioning device 30 can obtain the current command signal I from the power supply chassis 20. share , judge the load status of the server 10, and perform corresponding discharge and charging operations. In order to be able to respond to the load current changes of the server 10 in real time (quickly) and take into account the interference in the fluctuation, the power conditioning device 30 can use a low-pass filter of appropriate specifications or other appropriate algorithms to reduce the current command signal I share For example, Figure 6 The power conditioning device 30 includes a noise filtering circuit 31, which is configured to filter the current command signal I share The moving average calculation is performed so that the power conditioning device 30 can estimate the load status of the server 10 more accurately. Figure 6 The power conditioning device 30 includes a noise filtering circuit 31, a control circuit 33, a charge-discharge circuit 35, and an energy storage unit 39. The aforementioned circuit elements, such as the noise filtering circuit 31, the control circuit 33, and the charge-discharge circuit 35, can be implemented as separate circuit elements, integrated into one or more circuit elements, or implemented using software, firmware, and hardware.

[0079] The noise filtering circuit 31 is used to filter the current command signal I outputted by the power supply chassis 20. shareA moving average or other suitable algorithm is performed on the data, and the data is then provided to the control circuit 33 to determine whether to enable the charge-discharge circuit 35. If the control circuit 33 determines that the energy storage unit 39 needs to be charged, the control circuit 33 will output a charge enable signal CHG_EN to enable the charge-discharge circuit 35, allowing the energy storage unit 39 to receive power from the power bus 50 for charging. If the control circuit 33 determines that the energy storage unit 39 needs to be discharged, the control circuit 33 will output a discharge enable signal DCH_EN to enable the charge-discharge circuit 35, controlling the energy storage unit 39 to provide power to the power bus 50.

[0080] In another embodiment, the current command signal I share As for the processing, the power conditioning device 30 may also not include the noise filtering circuit 31, and directly use the current command signal I output by the power supply chassis 20 share The charge and discharge determination of the power conditioning device 30 is performed.

[0081] See Figure 7 As shown, it is a waveform diagram of an embodiment of the charge and discharge control of the power conditioning device of the present invention. Before time t1, the power supply of the power supply chassis 20 can follow the load change rate of the server 10 in real time, so only the output current I PSU The power bus 50 supplies power to the server 10. At this time, since the power conditioning device 30 does not provide or receive the regulated current I PCS , the system current I that supplies power to the server 10 SYS Equal to the output current I PSU After time t1, the load of the server 10 begins to increase rapidly, and at time t2, the control circuit 33 of the power conditioning device 30 determines that the current command signal I share The rate of change of rise (dI share / dt) exceeds the critical discharge current threshold I th_DCH Therefore, the control circuit 33 outputs the discharge enable signal DCH_EN to enable the charge-discharge circuit 35, and the energy storage unit 39 provides power to the power bus 50, so that the power conditioning device 30 performs a discharge operation and provides a regulated current I PCS to the server 10 to fill the system current I SYS With the output current I PSU The difference in current value (i.e. I SYS -I PSU ), and can provide sufficient power to the server 10, and allow the power supply chassis 20 to have enough time to output the current I PSU Gradually increase without causing too much impact on the power grid.

[0082] After time t1, due to the current command signal Ishare The rising rate of change exceeds the critical discharge current threshold I th_DCH Therefore, the control circuit 33 can detect the rapid increase in the load variation of the server 10 within a unit time, and can turn the discharge enable signal DCH_EN to a high level at any time point after the judgment time t1 to provide the regulation current I PCS To server 10. Figure 7 The line segments of the embodiment are simplified for ease of explanation, and the current command signal I share It can be a nonlinear signal. In this embodiment, although the load of the server 10 has increased rapidly after time t1, due to the current command signal I share The corresponding change will occur later than the system current I SYS The time when the load starts to increase rapidly, and if the power conditioning device 30 uses the noise filtering circuit 31 to control the current command signal I share Signal processing will increase the signal processing time, so the control circuit 33 does not confirm the current command signal I until time t2. share The rising rate of change has exceeded the critical discharge current threshold I th_DCH , and the power conditioning device 30 starts to discharge, providing a regulated current I PCS To server 10.

[0083] At time t2', the load of the server 10 remains at substantially the same level or changes at a slower rate. At this time, the power supply chassis 20 has gradually increased the output current I PSU Increase to a level closer to the system current I required by the server 10 SYS Therefore, at this time, the power conditioning device 30 can start to reduce the regulated current I PCS By time t3, the power supply of the power supply chassis 20 has been able to follow the load change rate of the server 10 in real time, so the power supply chassis 20 provides an output current I PSU The power bus 50 supplies power to the server 10, and the power conditioning device 30 stops providing the regulated current I PCS .

[0084] During the period from time t3 to time t4, since the load change of the server 10 is relatively gentle, the power supply chassis 20 provides the output current I PSU The power bus 50 supplies power to the server 10, and the power conditioning device 30 does not provide or receive the regulated current I PCS , the system current I that supplies power to the server 10 SYS Roughly equal to the output current I PSU .

[0085] After time t4, the load of the server 10 decreases rapidly, and the control circuit 33 of the power conditioning device 30 controls the current command signal I at time t5. share The rate of change of the decrease exceeds the critical charging current threshold I th_CHG , so the power conditioning device 30 performs a charging operation and receives the regulated current I PCS to the power conditioning device 30 to fill the output current I PSU With the system current I SYS The difference in current value (i.e. I PSU -I SYS ), and the power supply chassis 20 has enough time to output the current I PSU At this time, the charging enable signal CHG_EN output by the control circuit 33 turns high to enable the charge-discharge circuit 35 , thereby charging the energy storage unit 39 of the power conditioning device 30 through the power supply of the power supply chassis 20 .

[0086] After time t5, due to the current command signal I share The rate of change of decrease (dI share / dt) exceeds the critical charging current threshold I th_CHG Therefore, the control circuit 33 can detect the load variation of the server 10 in a unit time and quickly reduce it. At any time point after the judgment time t5, the charging enable signal CHG_EN is turned to a high level to receive the regulated current I PCS The energy storage unit 39 is charged. Figure 7 The line segments of the embodiment are simplified for ease of explanation, and the current command signal I share It can be a nonlinear signal. In this embodiment, although the load of the server 10 has been rapidly reduced after time t4, due to the current command signal I share The corresponding change will occur later than the system current I SYS The time to start to quickly reduce the load, and if the power conditioning device 30 uses the noise filtering circuit 31 to share Signal processing will increase the signal processing time, so the control circuit 33 does not confirm the current command signal I until time t5. share The rate of change of the decrease has exceeded the critical charging current threshold I th_CHG , and the power conditioning device 30 starts charging operation to receive the regulated current I PCS The energy storage unit 39 is charged.

[0087] At time t5', the load of the server 10 is maintained at substantially the same level or changes at a slower rate. At this time, the power supply chassis 20 has gradually reduced the output current I PSUIncrease to a level closer to the system current I required by the server 10 SYS Therefore, at this time, the power regulation device 30 can start to reduce the regulation current I PCS By time t6, the power supply of the power supply chassis 20 has been able to follow the load change rate of the server 10 in real time, so the power supply chassis 20 provides an output current I PSU The power bus 50 supplies power to the server 10, and the power conditioning device 30 stops receiving the regulated current I PCS After time t6, since the load change of the server 10 is relatively gentle, the power supply chassis 20 provides the output current I PSU The power bus 50 supplies power to the server 10, and the power conditioning device 30 does not provide or receive the regulated current I PCS , the system current I that supplies power to the server 10 SYS Equal to the output current I PSU .

[0088] Therefore, according to the current command signal I share The rising rate of change exceeds the critical discharge current threshold I th_DCH When the power conditioning device 30 provides the server 10 with a suitable value of regulated current I PCS Power supply; according to the current command signal I share The rate of change of the decrease exceeds the critical charging current threshold I th_CHG When the power regulating device 30 receives the regulating current I of appropriate value from the power bus 50 PCS The energy storage unit 39 is charged and stored to maintain the power supply stability of the power supply chassis 20. Therefore, during the operation of the server 10 shedding load, if the load change rate of the server 10 does not increase or decrease rapidly, the power conditioning device 30 can be in an idle state, and the output current I can be provided by the power supply chassis 20 alone. PSU As the system current I required by the server 10 SYS In another embodiment, if the load change rate of the server 10 does not increase or decrease rapidly, the power conditioning device 30 may also use an appropriate current value to regulate the current I PCS , charge or discharge the energy storage unit 39 to an appropriate amount of electricity.

[0089] In the above embodiment, the power conditioning device 30 provides or receives the regulated current I PCS The waveform is only one possible implementation. In other embodiments, the adjustment current I may be set based on parameters such as the charging and discharging speed of the energy storage unit 39 and the storage capacity of the energy storage unit 39. PCS In one embodiment, the energy storage unit 39 may not be able to quickly and completely compensate for the required system current ISYS With the output current I PSU The difference in current value (i.e. I SYS -I PSU ), or fully receive the output current I PSU and the required system current I SYS The current value (i.e. I PSU -I SYS ), but the power supply operation and charging operation provided by the power conditioning device 30 can still maintain the power supply stability of the power supply chassis 20 and its upstream power grid.

[0090] In another embodiment, the power conditioning device 30 can also be configured to perform charging or discharging operation at appropriate times according to the amount of storage capacity of the energy storage unit 39. Figure 7 During the time period t3-t4, if the storage capacity of the energy storage unit 39 is too low, the control circuit 33 can also control the energy storage unit 39 without affecting the supply system current I SYS Under the condition of output current I PSU Receive part of the current to charge the energy storage unit 39. In another embodiment, the control circuit 33 can also determine the regulated current I provided or received according to the storage capacity of the energy storage unit 39. PCS The current value enables the energy storage unit 39 to provide power supply operation and charging operation for a long time, while maintaining the power supply stability of the power supply chassis 20 and its upstream power grid.

[0091] Figure 8A FIG. 1 is a schematic diagram of another embodiment of a rack according to the present invention. Figure 8B FIG. 4 is a block diagram of another embodiment of a rack-mounted power supply system according to the present invention. Figure 8A The connection relationship and operation mode of the components such as the plurality of servers 1-1 to 1-N, the power supply chassis 20 and the power conditioning device 30' provided in the rack 1' of the embodiment are similar to those of FIG. Figure 1 The same or similar to rack 1. Figure 8A In the embodiment, the rack 1' further includes a second signal line 110, and the power conditioning device 30' obtains the bus voltage signal V on the power bus 50 through the second signal line 110. bus , to obtain the voltage information on the power bus 50. In one embodiment, the bus voltage signal V bus is a signal that is positively correlated with the voltage value on the power bus 50. The power conditioning device 30' uses the bus voltage signal V busTo obtain voltage information on the power bus 50, the server load condition can be assessed. One end of the second signal line 110 is connected to the power conditioning device 30', and the other end is connected to an appropriate location on the power bus 50. For example, the connection location to the power bus 50 can be close to where the power conditioning device 30' is located to obtain local voltage, close to certain servers with a high rate of power consumption fluctuation, or far from where the power conditioning device 30' is located to obtain remote voltage (such as in other racks).

[0092] Figure 8C FIG. 1 is a circuit block diagram of another embodiment of the power supply unit and the power conditioning device of the present invention. Figure 8C The connection relationship and operation mode of most components of the embodiment are similar to Figure 6 In this embodiment, the power conditioning device 30' can obtain the bus voltage signal V on the power bus 50 through the second signal line 110. bus To obtain the voltage information on the power bus 50. And the bus voltage signal V bus The control circuit 33 receives the bus voltage signal V bus Determine whether to enable the charge-discharge circuit 35. If the control circuit 33 determines that the energy storage unit 39 needs to be charged, the control circuit 33 outputs a charge enable signal CHG_EN to enable the charge-discharge circuit 35, allowing the energy storage unit 39 to receive power from the power bus 50 for charging. If the control circuit 33 determines that the energy storage unit 39 needs to be discharged, the control circuit 33 outputs a discharge enable signal DCH_EN to enable the charge-discharge circuit 35, controlling the energy storage unit 39 to provide power to the power bus 50.

[0093] Another embodiment of the present invention can be based only on the bus voltage signal V bus Determine whether to enable the charge and discharge circuit 35 to operate (without using the current command signal I share Judgment), so correspondingly, Figure 8C The current command signal I can be omitted share Related content, that is, the first signal line 100, the noise filtering circuit 31 and other related components and circuits can be omitted, and only the bus voltage signal V bus Related content.

[0094] See Figure 9 As shown, it is Figure 8C Waveform diagram of another embodiment of the charge and discharge control of the power conditioning device. This embodiment only uses the bus voltage signal V bus , without using the current command signal I shareBefore time t1, the power supply of the power supply chassis 20 can follow the load change rate of the server 10 in real time, so only the power supply chassis 20 provides the output current I PSU The power bus 50 supplies power to the server 10. At this time, since the power conditioning device 30' does not provide or receive the regulated current I PCS , the system current I that supplies power to the server 10 SYS Equal to the output current I PSU After time t1, the load of the server 10 begins to increase rapidly, and at time t1', the control circuit 33 of the power conditioning device 30' determines the bus voltage signal V bus The rate of change of decrease (dV bus / dt) exceeds the discharge critical voltage threshold V th_DCH Therefore, the control circuit 33 outputs the discharge enable signal DCH_EN to enable the charge-discharge circuit 35, and the energy storage unit 39 provides power to the power bus 50, so that the power conditioning device 30' performs a discharge operation and provides a regulated current I PCS to the server 10 to fill the system current I SYS With the output current I PSU The difference in current value (i.e. I SYS -I PSU ), and can provide sufficient power to the server 10, and allow the power supply chassis 20 to have enough time to output the current I PSU Gradually increase without causing too much impact on the power grid.

[0095] After time t1', due to the bus voltage signal V bus The rate of change of the decrease exceeds the discharge critical voltage threshold V th_DCH Therefore, the control circuit 33 can detect the rapid increase in the load variation of the server 10 within a unit time, and can determine the bus voltage signal V bus The rate of change of the decrease exceeds the discharge critical voltage threshold V th_DCH At any time point after time t1', the discharge enable signal DCH_EN is turned to a high level to provide a regulating current I PCS To server 10. Figure 9 The line segments of the embodiment are simplified for ease of explanation. The bus voltage signal V bus It can be a signal with nonlinear changes.

[0096] At time t2', the load of the server 10 remains at substantially the same level or changes at a slower rate. At this time, the power supply chassis 20 has gradually increased the output current I PSU Increase to a level closer to the system current I required by the server 10 SYSTherefore, at this time, the power regulation device 30' can start to reduce the regulation current I PCS By time t3, the power supply of the power supply chassis 20 has been able to follow the load change rate of the server 10 in real time, so the power supply chassis 20 provides an output current I PSU The power bus 50 supplies power to the server 10, and the power conditioning device 30' stops providing the regulated current I PCS .

[0097] During the period from time t3 to time t4, since the load change of the server 10 is relatively gentle, the power supply chassis 20 provides the output current I PSU The power bus 50 supplies power to the server 10, and the power conditioning device 30' does not provide or receive the regulated current I PCS , the system current I that supplies power to the server 10 SYS Roughly equal to the output current I PSU .

[0098] After time t4, the load of the server 10 decreases rapidly. At time t4', the control circuit 33 of the power conditioning device 30' adjusts the bus voltage signal V bus The rising rate of change exceeds the critical charging voltage threshold V th_CHG , so the power conditioning device 30 ' performs a charging operation and receives the regulated current I PCS to the power conditioning device 30' to fill the output current I PSU With the system current I SYS The difference in current value (i.e. I PSU -I SYS ), and the power supply chassis 20 has enough time to output the current I PSU At this time, the charging enable signal CHG_EN output by the control circuit 33 turns high to enable the charge-discharge circuit 35 , thereby charging the energy storage unit 39 of the power conditioning device 30 ′ through the power supply of the power supply chassis 20 .

[0099] After time t4', due to the bus voltage signal V bus The rate of change of rise (dV bus / dt) exceeds the critical charging voltage threshold V th_CHG Therefore, the control circuit 33 can detect that the load variation of the server 10 decreases rapidly in a unit time, and can judge the bus voltage signal V bus The rate of change of rise (dV bus / dt) exceeds the critical charging voltage threshold V th_CHG At any time point after time t4', the charging enable signal CHG_EN is turned to a high level to receive the regulation current I PCSThe energy storage unit 39 is charged. Figure 9 The line segments of the embodiment are simplified for ease of explanation. The bus voltage signal V bus It can be a signal with nonlinear changes.

[0100] At time t5', the load of the server 10 is maintained at substantially the same level or changes at a slower rate. At this time, the power supply chassis 20 has gradually reduced the output current I PSU Increase to a level closer to the system current I required by the server 10 SYS Therefore, at this time, the power regulation device 30' can start to reduce the regulation current I PCS By time t6, the power supply of the power supply chassis 20 has been able to follow the load change rate of the server 10 in real time, so the power supply chassis 20 provides an output current I PSU The power bus 50 supplies power to the server 10, and the power conditioning device 30' stops receiving the regulated current I PCS After time t6, since the load change of the server 10 is relatively gentle, the power supply chassis 20 provides the output current I PSU The power bus 50 supplies power to the server 10, and the power conditioning device 30' does not provide or receive the regulated current I PCS , the system current I that supplies power to the server 10 SYS Equal to the output current I PSU .

[0101] Therefore, according to the bus voltage signal V bus The rate of change of the decrease exceeds the discharge critical voltage threshold V th_DCH When the power regulating device 30' provides the server 10 with a regulating current I of a suitable value, PCS Power supply; according to the bus voltage signal V bus The rising rate of change exceeds the critical charging voltage threshold V th_CHG When the power regulating device 30' receives the regulating current I of the appropriate value from the power bus 50 PCS The energy storage unit 39 is charged and stored to maintain the power supply stability of the power supply chassis 20. Therefore, during the operation of the server 10 shedding load, if the load change rate of the server 10 does not increase or decrease rapidly, the power conditioning device 30' can be in an idle state, and the output current I can be provided by the power supply chassis 20 alone. PSU As the system current I required by the server 10 SYS In another embodiment, if the load change rate of the server 10 does not increase or decrease rapidly, the power conditioning device 30' may also use an appropriate current value to regulate the current I PCS , charge or discharge the energy storage unit 39 to an appropriate amount of electricity.

[0102] See Figure 10 As shown, it is Figure 8C The waveform diagram of another embodiment of the charging and discharging control of the power conditioning device. In this embodiment, the power conditioning device 30 'uses the bus voltage signal V bus And the current command signal I share As a judgment of whether the load increases or decreases rapidly. At time t1', due to the bus voltage signal V bus The rate of change of the decrease exceeds the discharge critical voltage threshold V th_DCH Therefore, the control circuit 33 is based on the bus voltage signal V bus The decreasing rate of change determines that the load variation of the server 10 increases rapidly, so at time t1′, the power conditioning device 30′ is set to provide a first regulating current I PCS1 , to partially make up for I SYS -I PSU That is, I PCS1 =k1*(I SYS -I PSU ), where k1 is a positive number less than 1. When time t2 comes, the current command signal I share The rising rate of change has exceeded the critical discharge current threshold I th_DCH , thus ensuring that the load variation increases rapidly. Therefore, the power conditioning device 30' provides a second regulating current I PCS2 Perform discharge operation, where I PCS2 =k2*(I SYS -I PSU ), for example, k2 is set to 1 and I SYS -I PSU The difference in the regulated current is sent to the server 10, where k2>k1, and the second regulated current I PCS2 Greater than the first regulating current I PCS1 Since the bus voltage signal V bus The response speed to the load condition is faster but it may be more prone to misjudgment (for example, the load changes for only a short time). Therefore, during the time period t1'-time t2, the first regulating current I is first provided. PCS1 If the subsequent load continues to increase, part of the current difference can be compensated in advance; if there is a misjudgment, it will not have a big impact on the system. share After the judgment is more accurate, a larger second regulating current I is provided. PCS2 Provide power supply.

[0103] Similarly, at time t4', due to the determination of the bus voltage signal V bus The rising rate of change exceeds the critical charging voltage threshold Vth_CHG Therefore, the control circuit 33 is based on the bus voltage signal V bus The rising change rate of the server 10 determines that the load variation of the server 10 decreases rapidly, so the power conditioning device 30' is set to receive a third regulating current I at time t4'. PCS3 The energy storage unit 39 is charged to partially compensate for the PSU -I SYS That is, I PCS3 =k3*(I PSU -I SYS ), where k3 is a positive number less than 1. When time t5 comes, due to the current command signal I share The rate of change of the decrease has exceeded the critical charging current threshold I th_CHG , thus ensuring that the load variation is reduced rapidly. Therefore, the power conditioning device 30' receives a fourth regulating current I PCS4 , where I PCS4 =k4*(I PSU -I SYS ), for example, set k4 to 1 and receive I PSU -I SYS The energy storage unit 39 is charged by the regulating current of the difference, wherein k4>k3, and the fourth regulating current I PCS4 Greater than the third regulation current I PCS3 . Due to V bus The response speed to the load condition is faster but it may be more prone to misjudgment (for example, only a short-term load change). Therefore, during the time period t4'-time 5, the third regulating current I is first received. PCS3 If the subsequent load continues to increase, the current difference value can be received in advance; if there is a misjudgment, it will not have a big impact on the system. share After the judgment is more accurate, the fourth larger regulating current I is received. PCS4 .

[0104] In the above embodiment, whether it is based solely on the current command signal I share , based solely on the bus voltage signal V bus , or based on the current command signal I share and bus voltage signal V bus The control circuit of the power conditioning device can determine the current value of the current provided or received according to appropriate conditions, such as the storage capacity of the energy storage unit, the AC input voltage V AC The values ​​of k1 to k4 are determined based on one or more parameters such as the ripple specification, historical statistical data, etc. In one embodiment, the AC input voltage VAC The maximum ripple on the power supply is 10%, and the control circuit of the power conditioning device can provide or receive the system current I SYS And the output current I PSU The appropriate ratio of the difference between the two (which can be set to be greater than 1 or less than 1 respectively) is used to adjust the current I PCS , so that the AC input voltage V AC The ripple specifications above meet the required regulations.

[0105] In the above embodiment, the current command signal I share The rising rate of change, the falling rate of change, and the bus voltage signal V bus The rising rate of change, the falling rate of change, and the discharge critical current threshold I th_DCH , charging critical current threshold I th_CHG , discharge critical voltage threshold V th_DCH , charging critical voltage threshold V th_CHG The value of can be expressed in an appropriate format to determine whether the load change rate of the server 10 exceeds the threshold and needs to be provided or received by the power conditioning device 30, 30'. PCS For example: current command signal I share The rate of change of the critical discharge current threshold I th_DCH , charging critical current threshold I th_CHG The absolute values ​​are compared to determine the load change rate of the server 10. In another embodiment, the current command signal I share The rate of change of decrease and the critical current threshold value I th_CHG The values ​​of are all negative. When the current command signal I share The value of the decreasing rate of change (such as -5V / ms) is less than the critical charging current threshold I th_CHG When the value is (such as -3V / ms), the control circuit will judge the current command signal I share The rate of change of the decrease exceeds the critical charging current threshold I th_CHG The same applies to the bus voltage signal V bus operation.

[0106] In summary, the present invention has the following features and advantages: the power conditioning device 30, 30' can obtain the current command signal I from the power supply chassis 20. share and the bus voltage signal V obtained by the power bus 50 bus At least one of the above is used to determine the load reduction status of the server 10: during the load reduction process of the server 10, the load change speed increases suddenly, so that the current command signal I share The rising rate of change exceeds the critical discharge current threshold I th_DCH , and / or bus voltage signal V busThe rate of change of the decrease exceeds the discharge critical voltage threshold V th_DCH When the power conditioning device 30, 30' supplies power to the server 10; during the unloading process of the server 10, the load change speed drops sharply, causing the current command signal I share The rate of change of the decrease exceeds the critical charging current threshold I th_CHG , and / or bus voltage signal V bus The rising rate of change exceeds the critical charging voltage threshold V th_CHG When the power supply chassis 20 charges the power conditioning devices 30, 30', thereby maintaining the power supply stability of the power supply chassis 20 and its upstream power grid. Therefore, the present invention not only uses the bus voltage signal V bus And the current command signal I share At least one of the power conditioning devices 30, 30' is used to determine whether the bus voltage signal V is a charging operation or a discharging operation. bus It can realize real-time, fast and non-delayed judgment of load status, and use the current command signal I share The load condition can be judged to be stable, so the bus voltage signal V bus With the current command signal I share , you can have the advantages of both.

[0107] The above description is only a detailed description and drawings of the preferred specific embodiments of the present invention, and the features of the present invention are not limited thereto and are not intended to limit the present invention. The full scope of the present invention shall be based on the scope of the patent application. All concepts that fall within the scope of the patent application of the present invention and embodiments with similar variations thereof shall be included in the scope of the present invention. Any changes or modifications that can be easily conceived by any person skilled in the art within the field of the present invention shall be included in the patent scope of the present disclosure.

Claims

1. A power conditioning device, coupled to a server and a power supply chassis via a power bus, comprising: a control circuit for receiving a bus voltage signal from the power bus, wherein the bus voltage signal is positively correlated to a current value of an output current generated by the power chassis; a charge-discharge circuit coupled to the control circuit and receiving a discharge enable signal or a charge enable signal generated by the control circuit; and an energy storage unit coupled to the charge-discharge circuit; When the control circuit determines that a decreasing rate of change of the bus voltage signal exceeds a critical discharge voltage threshold, the control circuit generates the discharge enable signal, causing the charge-discharge circuit to control the energy storage unit to provide a first regulated current to the power bus for power supply; When the control circuit determines that a rising rate of change of the bus voltage signal exceeds a charging critical voltage threshold, the control circuit generates the charging enable signal to enable the charge-discharge circuit to receive a third regulated current from the power bus to charge the energy storage unit.

2. The power conditioning device as described in claim 1, wherein when the charge-discharge circuit controls the energy storage unit to provide the first regulated current to the power bus, the magnitude of a system current supplying power to the server is equal to the magnitude of the output current plus the magnitude of the first regulated current; when the charge-discharge circuit receives the third regulated current from the power bus to charge the energy storage unit, the magnitude of the third regulated current is equal to the magnitude of the output current minus the magnitude of the system current.

3. The power conditioning device of claim 1 , wherein the control circuit is configured to receive a current command signal from the power supply chassis, wherein the current command signal is positively correlated to a current value of the output current generated by the power supply chassis; After the energy storage unit provides the first regulated current to the power bus for power supply, when the control circuit determines that a rising rate of change of the current command signal exceeds a critical discharge current threshold, the charge-discharge circuit controls the energy storage unit to provide a second regulated current to the power bus for power supply; wherein the second regulated current is greater than the first regulated current; After the power bus receives the third regulated current to charge the energy storage unit, when the control circuit determines that a decreasing rate of change of the current command signal exceeds a charging critical current threshold, the charge-discharge circuit receives a fourth regulated current from the power bus to charge the energy storage unit; wherein the fourth regulated current is greater than the third regulated current.

4. The power conditioning device as claimed in claim 3, wherein the magnitude of the first regulated current is equal to k1 times the difference between the magnitude of a system current supplying power to the server and the magnitude of the output current: I PCS1 =k1*(I SYS -I PSU ), where k1 is a positive number less than 1, I PCS1 is the first regulating current, I SYS is the system current, I PSU The magnitude of the second regulating current is equal to k2 times the difference between the magnitude of the system current and the magnitude of the output current: I PCS2 =k2*(I SYS -I PSU ), where k2>k1, I PCS2 The magnitude of the third regulating current is equal to k3 times the difference between the magnitude of the output current and the magnitude of the system current: I PCS3 =k3*(I PSU -I SYS ), where k3 is a positive number less than 1, I PCS3 The magnitude of the fourth regulating current is equal to k4 times the difference between the magnitude of the output current and the magnitude of the system current: I PCS4 =k4*(I PSU -I SYS ), where k4>k3, I PCS4 is the fourth regulated current.

5. A rack-mounted power supply system for supplying power to a server via a power bus; It includes: a power supply chassis for receiving an input power source and converting the input power source to provide an output current to the power bus, so that the power bus transmits a system current to power the server; and a power conditioning device electrically connected to the power bus; The power regulating device is configured to receive a bus voltage signal from the power bus through a second signal line, wherein the bus voltage signal is positively correlated with the current value of the output current; When the power conditioning device determines that a decreasing rate of change of the bus voltage signal exceeds a critical discharge voltage threshold, the power conditioning device is configured to provide a first regulated current to the power bus to jointly power the server with the power supply chassis; When the power regulating device determines that a rising rate of change of the bus voltage signal exceeds a critical charging voltage threshold, the power regulating device is configured to receive a third regulating current from the power bus.

6. The rack-mounted power supply system of claim 5 , wherein when the power conditioning device provides the first regulated current to the power bus, the magnitude of the system current is equal to the magnitude of the output current plus the magnitude of the first regulated current; and when the power conditioning device receives the third regulated current from the power bus, the magnitude of the third regulated current is equal to the magnitude of the output current minus the magnitude of the system current.

7. The rack-mounted power supply system of claim 5 , wherein the power conditioning device is configured to receive a current command signal from the power chassis via a first signal line, wherein the current command signal is positively correlated to a current value of an output current generated by the power chassis; After the power regulating device provides the first regulating current to the power bus for power supply, when the power regulating device determines that a rising rate of change of the current command signal exceeds a critical discharge current threshold, the power regulating device provides a second regulating current to the power bus for power supply; wherein the second regulating current is greater than the first regulating current; After the power regulating device receives the third regulating current from the power bus, when the power regulating device determines that a decreasing rate of change of the current command signal exceeds a charging critical current threshold, the power regulating device receives a fourth regulating current from the power bus; wherein the fourth regulating current is greater than the third regulating current.

8. The rack-mounted power supply system as claimed in claim 7, wherein the magnitude of the first regulated current is equal to k1 times the difference between the magnitude of the system current and the magnitude of the output current: I PCS1 =k1*(I SYS -I PSU ), where k1 is a positive number less than 1, I PCS1 is the first regulating current, I SYS is the system current, I PSU The magnitude of the second regulating current is equal to k2 times the difference between the magnitude of the system current and the magnitude of the output current: I PCS2 =k2*(I SYS -I PSU ), where k2>k1, I PCS2 The magnitude of the third regulating current is equal to k3 times the difference between the magnitude of the output current and the magnitude of the system current: I PCS3 =k3*(I PSU -I SYS ), where k3 is a positive number less than 1, I PCS3 The magnitude of the fourth regulating current is equal to k4 times the difference between the magnitude of the output current and the magnitude of the system current: I PCS4 =k4*(I PSU -I SYS ), where k4>k3, I PCS4 is the fourth regulated current.

9. A power regulation operation method for controlling a power regulation device, wherein the power regulation device is coupled to a server and a power supply chassis via a power bus, the method comprising: The power conditioning device receives a bus voltage signal from the power bus, wherein the bus voltage signal is positively correlated with a current value of an output current generated by the power chassis; When the power regulating device determines that a decreasing rate of change of the bus voltage signal exceeds a critical discharge voltage threshold, the power regulating device is configured to provide a first regulating current to the power bus for power supply; When the power regulating device determines that a rising rate of change of the bus voltage signal exceeds a charging critical voltage threshold, the power regulating device is configured to receive a third regulating current from the power bus for charging.

10. The power regulation operation method as described in claim 9, wherein when the power regulation device provides the first regulated current to the power bus, the magnitude of a system current supplying power to the server is equal to the magnitude of the output current plus the magnitude of the first regulated current; when the power regulation device is used to receive the third regulated current from the power bus, the magnitude of the third regulated current is equal to the magnitude of the output current minus the magnitude of the system current.

11. The power regulation operation method according to claim 9, further comprising: The power regulating device receives a current command signal from the power supply chassis, wherein the current command signal is positively correlated with the current value of the output current generated by the power supply chassis; After the power regulating device provides the first regulating current to the power bus for power supply, when the power regulating device determines that a rising rate of change of the current command signal exceeds a critical discharge current threshold, the power regulating device provides a second regulating current to the power bus for power supply; wherein the second regulating current is greater than the first regulating current; After the power regulating device receives the third regulating current from the power bus, when the power regulating device determines that a decreasing rate of change of the current command signal exceeds a charging critical current threshold, the power regulating device receives a fourth regulating current from the power bus; wherein the fourth regulating current is greater than the third regulating current.

12. The power regulation operation method according to claim 11, wherein the magnitude of the first regulation current is equal to k1 times the difference between the magnitude of a system current supplying power to the server and the magnitude of the output current: I PCS1 =k1*(I SYS -I PSU ), where k1 is a positive number less than 1, I PCS1 is the first regulating current, I SYS is the system current, I PSU The magnitude of the second regulating current is equal to k2 times the difference between the magnitude of the system current and the magnitude of the output current: I PCS2 =k2*(I SYS -I PSU ), where k2>k1, I PCS2 The magnitude of the third regulating current is equal to k3 times the difference between the magnitude of the output current and the magnitude of the system current: I PCS3 =k3*(I PSU -I SYS ), where k3 is a positive number less than 1, I PCS3 The magnitude of the fourth regulating current is equal to k4 times the difference between the magnitude of the output current and the magnitude of the system current: I PCS4 =k4*(I PSU -I SYS ), where k4>k3, I PCS4 is the fourth regulated current.

Images