Power supply system and method

Abstract

The invention relates to the technical field of power supplies, and discloses a power supply system and method, and the system comprises a capacitance regulation and control device and a power supply unit. The capacitance regulation and control equipment is used for acquiring the environment temperature, the actual output power and the target output power of the power supply, and determining the current capacitance value of a preset capacitor in the power supply and the target temperature corresponding to the current capacitance value; the capacitance regulation and control equipment is used for determining a first difference value between the target temperature and the environment temperature and a second difference value between the actual output power and the target output power, and regulating and controlling the capacitance value of the preset capacitor to be a target capacitance value according to the first difference value and the second difference value; and the power supply is used for supplying power to the target load based on the preset capacitor with the capacitance value as the target capacitance value. The problem that the performance of the power supply becomes poor due to the fact that aluminum electrolysis electricity in the power supply is prone to being affected by the environment is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to a power supply system and method. Background Art

[0002] The power supply unit (PSU) is a vital component in electronic devices such as computers, servers, network equipment, and industrial control equipment. The main function of the power supply is to convert the input alternating current (AC) into stable direct current (DC) for use by various components inside the device. Output hold-up time (Hold-up Time) and power factor (Power Factor, PF) are two important indicators of power supply performance. The output hold-up time is the time the output voltage is maintained when the input voltage of the power supply is temporarily powered off. The power factor is an important indicator to measure the power efficiency of the power supply, which represents the ratio of active power to apparent power.

[0003] Aluminum electrolytic capacitors are important energy storage components in power supplies. The performance of aluminum electrolytic capacitors directly affects the output maintenance time and power factor of the power supply. However, the capacitance of aluminum electrolytic capacitors is easily affected by the environment. The capacitance of aluminum electrolytic capacitors may decrease, and the performance of aluminum electrolytic capacitors will drop sharply, resulting in insufficient output maintenance time or poor PF of the power supply when the input voltage is temporarily off.

[0004] Therefore, the related art has the problem that the aluminum electrolytic battery in the power supply is easily affected by the environment, resulting in poor performance of the power supply. Summary of the invention

[0005] In view of this, the present invention provides a power supply system and method to solve the problem that the aluminum electrolytic battery in the power supply is easily affected by the environment, resulting in poor performance of the power supply.

[0006] In a first aspect, the present invention provides a power supply system, the system comprising: a capacitance control device and a power supply;

[0007] The capacitor control device is used to obtain the ambient temperature, actual output power and target output power of the power supply, and determine the current capacitance value of the preset capacitor in the power supply and the target temperature corresponding to the current capacitance value;

[0008] The capacitance control device is used to determine a first difference between the target temperature and the ambient temperature, and a second difference between the actual output power and the target output power, and to control the capacitance value of the preset capacitor to be the target capacitance value according to the first difference, the second difference and the current capacitance value;

[0009] The power supply is used to supply power to a target load based on a preset capacitor having a target capacitance value.

[0010] In the power supply system provided by this embodiment, the capacitance control device adjusts the preset capacitance to the target capacitance value according to the first difference between the target temperature and the ambient temperature, the second difference between the actual output power and the target output power, and the current capacitance value of the preset capacitance in the power supply, thereby eliminating the influence of the environment on the preset capacitance, improving the performance of the power supply, enabling the power supply to operate stably in different environments, and improving the output maintenance time of the power supply. This solves the problem that the aluminum electrolytic battery in the power supply is easily affected by the environment, resulting in poor performance of the power supply.

[0011] In an optional implementation, the capacitance control device includes: an ambient temperature sensing module, a power sensing module, a control module, a heating module, and a dynamic formula module;

[0012] The ambient temperature sensing module is connected to the control module and is used to obtain the ambient temperature and transmit the ambient temperature to the control module;

[0013] The power sensing module is connected to the control module, and is used to obtain the actual output power and the target output power, and transmit the actual output power and the target output power to the control module;

[0014] The dynamic formula module is connected to the control module, and is used to obtain the temperature-capacitance value correspondence relationship of the preset capacitor and the current capacitance value, determine the target temperature according to the current capacitance value and the temperature-capacitance value correspondence relationship, and transmit the current capacitance value and the target temperature to the control module;

[0015] The control module is connected to the heating module, and is used to determine the first difference and the second difference, determine the target heating power of the heating module according to the first difference, the second difference and the current capacitance value, and transmit the target heating power to the heating module;

[0016] The heating module is used to heat the preset capacitor according to the target heating power, and adjust the capacitance value of the preset capacitor to the target capacitance value. The heating module is, for example, a heater, a heating film, a heating sheet, etc. The heating module covers the cylindrical shell of the preset capacitor and can heat the shell of the preset capacitor.

[0017] In this embodiment, the target heating power is determined, and the heating module heats the preset capacitor according to the target heating power, and adjusts the capacitance value of the preset capacitor to the target capacitance value, so that the preset capacitor adapts to environmental changes and ensures that the aluminum electrolytic capacitor operates within the optimal temperature range, thereby improving its capacitance and energy storage performance.

[0018] In an optional implementation, the ambient temperature sensing module acquires the ambient temperature and transmits the ambient temperature to the control module, including: acquiring the ambient temperature of the power supply;

[0019] When the ambient temperature is lower than the first preset threshold, or the output voltage of the power supply is higher than the second preset threshold, the ambient temperature is transmitted to the control module.

[0020] In an optional implementation, the capacitance control device further includes: a capacitance temperature sensing module;

[0021] The capacitor temperature sensing module is connected to the dynamic formula module to obtain the current temperature of the preset capacitor and send the current temperature to the dynamic formula module;

[0022] The dynamic formula module obtains the temperature capacitance value correspondence relationship of the preset capacitor and the current capacitance value, determines the target temperature according to the current capacitance value and the temperature capacitance value correspondence relationship, and transmits the current capacitance value and the target temperature to the control module, including:

[0023] Obtaining capacitance values ​​of a preset capacitor at a preset number of temperatures, and generating a temperature-capacitance value curve graph according to the preset number of temperatures and capacitance values, wherein the temperature-capacitance value curve graph includes a temperature-capacitance value correspondence relationship;

[0024] The target temperature is determined according to the correspondence between the current capacitance value and the temperature capacitance value. When the current temperature is lower than the target temperature, the current capacitance value and the target temperature are transmitted to the control module.

[0025] In this embodiment, as long as the current temperature of the preset capacitor is lower than the target temperature, the dynamic formula module transmits the current capacitance value and the target temperature to the control module, and the control module dynamically adjusts the temperature of the preset capacitor to increase the capacitance of the preset capacitor, thereby improving the stability and efficiency of the power supply.

[0026] In an optional implementation, the control module determines the first difference, determines the target heating power of the heating module according to the first difference, the second difference and the current capacitance value, and transmits the target heating power to the heating module, including:

[0027] determining a first difference between the target temperature and the ambient temperature;

[0028] Obtain the preset control parameters and the initial capacitance value of the preset capacitor, and determine the target heating power of the heating module based on the first difference, the second difference, the preset control parameters, the initial capacitance value and the current capacitance value, and transmit the target heating power to the heating module.

[0029] In this embodiment, the control module determines the target heating power of the heating module, and transmits the target heating power to the heating module to heat the preset capacitor, increase the temperature of the preset capacitor, and make the capacitance value of the preset capacitor reach the target capacitance value, so as to achieve adaptive gain of the capacitance value of the preset capacitor in temperature and power control.

[0030] In an optional embodiment, the power supply includes: a filter module, a rectifier module, a power factor correction module, a pulse width modulation module, a transformer module, an output rectifier module, an anti-reverse injection protection module and a DC output module;

[0031] The power factor correction module includes a preset capacitor;

[0032] The DC output module is used to output a DC voltage to a target load to provide power for the target load.

[0033] In an optional implementation, the capacitance control device further includes: a power factor sensing module;

[0034] The power factor sensing module is connected to the dynamic formula module, and is used to obtain the current power factor of the preset capacitor and send the current power factor to the dynamic formula module;

[0035] The dynamic formula module is used to transmit the current capacitance value and the target temperature to the control module when the current temperature is lower than the target temperature or the current power factor is lower than the third preset threshold.

[0036] In this embodiment, by designing an external heating and temperature control mechanism for the aluminum electrolytic capacitor, the power supply can operate stably in different environments, while improving the output maintenance time. In addition, a power factor sensing module is introduced to obtain the current power factor of the preset capacitor, and it is determined whether to transmit the current capacitance value and the target temperature to the control module according to the current power factor, so as to control the temperature and capacitance of the preset capacitor. The energy storage performance of the preset capacitor is improved without increasing the capacitor volume, and the preset capacitor maintains the optimal power factor, thereby improving the overall power efficiency.

[0037] In an optional implementation, the dynamic formula module is further used to generate capacitance prediction values ​​of a preset capacitor at a preset number of temperatures according to a temperature capacitance value curve graph;

[0038] The control module is also used to adjust preset control parameters according to the predicted capacitance value.

[0039] In this embodiment, the control module adjusts the preset control parameters according to the capacitance prediction value of the preset capacitor by the dynamic formula module to adapt to the dynamically changing ambient temperature and power requirements, thereby improving the accuracy and control efficiency of dynamically controlling the preset capacitor temperature and capacitance value.

[0040] In an optional implementation, the dynamic formula module is further used to:

[0041] Obtaining a corresponding relationship between a capacitance value of a preset capacitor and an output holding time of a power supply;

[0042] Generate a temperature maintenance time curve according to the temperature capacitance value curve and the corresponding relationship;

[0043] Determine the target temperature based on the temperature maintenance time curve and the target output maintenance time.

[0044] In a second aspect, the present invention provides a power supply method, which is applied to a capacitance control device, and the method includes:

[0045] Obtaining the ambient temperature, actual output power, and target output power of the power supply, and determining the current capacitance value of a preset capacitor in the power supply and the target temperature corresponding to the current capacitance value;

[0046] Determine a first difference between the target temperature and the ambient temperature, and a second difference between the actual output power and the target output power, and adjust the capacitance value of the preset capacitor to the target capacitance value based on the first difference, the second difference and the current capacitance value, so that the power supply supplies power to the target load based on the preset capacitor with the capacitance value of the target capacitance value.

[0047] In the power supply method provided in this embodiment, the capacitance control device makes the capacitance of the preset capacitor still reach the target capacitance value under the influence of the environment according to the first difference between the target temperature and the ambient temperature, the second difference between the actual output power and the target output power, and the current capacitance value of the preset capacitor in the power supply, thereby improving the performance of the power supply, enabling the power supply to operate stably under different environments, and at the same time improving the output maintenance time of the power supply. The problem that the aluminum electrolytic battery in the power supply is easily affected by the environment, resulting in poor performance of the power supply, is solved.

[0048] In a third aspect, the present invention provides a testing device, the device comprising:

[0049] A determination module, used to obtain the ambient temperature, actual output power and target output power of the power supply, and determine the current capacitance value of a preset capacitor in the power supply and the target temperature corresponding to the current capacitance value;

[0050] The control module is used to determine a first difference between the target temperature and the ambient temperature, and a second difference between the actual output power and the target output power, and to control the capacitance value of the preset capacitor to be the target capacitance value based on the first difference, the second difference and the current capacitance value, so that the power supply supplies power to the target load based on the preset capacitor with the capacitance value of the target capacitance value.

[0051] In a fourth aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the power supply method of the third aspect above by executing the computer instructions.

[0052] In a fifth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the power supply method of the third aspect.

[0053] In a sixth aspect, the present invention provides a computer program product, comprising computer instructions, wherein the computer instructions are used to enable a computer to execute the power supply method of the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0055] Figure 1 is a schematic structural diagram of a power supply system according to an embodiment of the present invention;

[0056] Figure 2 is a schematic diagram of the structure of a capacitance control device according to an embodiment of the present invention;

[0057] Figure 3 is a flow chart of a method for increasing the output holding time of a power supply according to an embodiment of the present invention;

[0058] Figure 4 is a structural schematic diagram of a dynamic formula module according to an embodiment of the present invention;

[0059] Figure 5 is a schematic diagram of a temperature capacitance value curve according to an embodiment of the present invention;

[0060] Figure 6 is a structural schematic diagram of a PID control module according to an embodiment of the present invention;

[0061] Figure 7 is a schematic structural diagram of a power supply according to an embodiment of the present invention;

[0062] Figure 8 is a structural schematic diagram of another capacitance control device according to an embodiment of the present invention;

[0063] Fig. 9 is a schematic diagram of a temperature maintenance time curve according to an embodiment of the present invention;

[0064] Fig.10 is a schematic flow chart of a power supply method applied to a capacitor control device according to an embodiment of the present invention;

[0065] Fig.11is a structural block diagram of a testing device according to an embodiment of the present invention;

[0066] Fig.12 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0068] Aluminum electrolytic capacitors are important energy storage components in power supplies and are widely used in power supplies. The performance of aluminum electrolytic capacitors directly affects the output maintenance time and power factor of the power supply. Therefore, PSU's performance requirements for aluminum electrolytic capacitors are constantly increasing, especially in high-frequency and high-power applications, which require aluminum electrolytic capacitors to have higher response speed and stability. However, the capacitance of aluminum electrolytic capacitors is significantly affected by ambient temperature. As the temperature decreases, the capacitance of aluminum electrolytic capacitors tends to decrease, which is particularly obvious in low temperature environments.

[0069] At present, in order to solve the problem that the capacitance of aluminum electrolytic capacitors decreases due to temperature drop, and the output maintenance time is insufficient when the PSU input is temporarily powered off, which in turn affects the performance of the PSU, the capacitor volume is increased to increase the capacity of the capacitor, and the capacity of the capacitor is further increased by relying on good design and material selection. However, the above method does not fully consider the impact of the external environment on the performance of the capacitor, and the effect is often limited. For example, in a low temperature environment, the capacity of the aluminum electrolytic capacitor will still decrease, resulting in a decrease in the output maintenance time of the power supply or a deterioration in the PF when the input voltage is temporarily powered off. In addition, increasing the capacitor volume will occupy more circuit board area, affecting the PSU circuit design.

[0070] Based on the above content, an embodiment of the present invention provides a power supply system that intelligently heats the aluminum electrolytic capacitor in the power supply, automatically adjusts the temperature of the capacitor housing of the aluminum electrolytic capacitor to adapt to environmental changes, ensures that the aluminum electrolytic capacitor operates within the optimal temperature range, and thus improves its capacitance and energy storage performance. Through temperature control, the power supply can stably provide the required output maintenance time and PF under different temperature conditions based on the regulated aluminum electrolytic capacitor. This can achieve the effect of improving the stability and reliability of the power supply without increasing the volume of the capacitor, while improving the overall power efficiency.

[0071] In this embodiment, a power supply system is provided. Figure 1 As shown, the system includes: a capacitance control device and a power supply;

[0072] The capacitor control device is used to obtain the ambient temperature, actual output power and target output power of the power supply, and determine the current capacitance value of the preset capacitor in the power supply and the target temperature corresponding to the current capacitance value;

[0073] The capacitance control device is used to determine a first difference between the target temperature and the ambient temperature, and a second difference between the actual output power and the target output power, and to control the capacitance value of the preset capacitor to be the target capacitance value according to the first difference, the second difference and the current capacitance value;

[0074] The power supply is used to supply power to a target load based on a preset capacitor having a target capacitance value.

[0075] Specifically, the preset capacitor is an aluminum electrolytic capacitor in a power supply (PSU). Because the preset capacitor in the power supply is an aluminum electrolytic capacitor, the capacitance of the aluminum electrolytic capacitor is greatly affected by the ambient temperature. In addition to obtaining the actual output power and target output power of the power supply, the capacitor control device also needs to obtain the ambient temperature of the preset capacitor.

[0076] The capacitor control device determines the output hold-up time (Hold-up Time) required by the PSU, for example: the output hold-up time is maintained for 10ms at full power output. Determine the current capacitance value of the preset capacitor. The output hold-up time is affected by the capacitance value of the preset capacitor. According to the output hold-up time required by the PSU, the target capacitance value of the preset capacitor is determined. Because the capacitance value of the aluminum electrolytic capacitor is affected by the ambient temperature, the current capacitance value of the preset capacitor is determined. Based on the known relationship between capacitance and temperature, the target capacitance value that can maintain the output hold-up time required by the PSU is determined. Determine the target temperature corresponding to the target capacitance value based on the relationship between capacitance and temperature.

[0077] The capacitance control device calculates a first difference between the target temperature and the ambient temperature, and calculates a second difference between the actual output power and the target output power. The capacitance control device adjusts the capacitance value of the preset capacitor to the target capacitance value according to the first difference and the second difference. For example, there is a heating control circuit in the capacitance control device. The heating device (such as a heater, a heating film, a heating sheet, etc.) in the heating control circuit covers the cylindrical shell of the preset capacitor, and can heat the shell of the preset capacitor to increase the temperature of the preset capacitor and thus increase the capacitance value of the preset capacitor. According to the first difference and the second difference, the heating power of the heating device is determined so that the temperature of the preset capacitor reaches the target temperature. At this time, the capacitance value of the preset capacitor is the current capacitance value; or, the preset capacitor in the power supply is an electronically adjustable variable capacitor. The capacitance control device can directly adjust the capacitance value of the variable capacitor according to the second difference so that it increases the second difference and reaches the current capacitance value.

[0078] The power supply converts input alternating current (AC) into stable direct current (DC) based on a preset capacitor having a current capacitance value to supply power to a target load, such as various components inside a computer device, various components inside a home appliance device, etc.

[0079] In the power supply system provided by this embodiment, the capacitance control device adjusts the preset capacitance to the target capacitance value according to the first difference between the target temperature and the ambient temperature, the second difference between the actual output power and the target output power, and the current capacitance value of the preset capacitance in the power supply, thereby eliminating the influence of the environment on the preset capacitance, improving the performance of the power supply, enabling the power supply to operate stably in different environments, and improving the output maintenance time of the power supply. This solves the problem that the aluminum electrolytic battery in the power supply is easily affected by the environment, resulting in poor performance of the power supply.

[0080] In some optional implementations, the capacitance control device includes: an ambient temperature sensing module, a power sensing module, a control module, a heating module, and a dynamic formula module;

[0081] The ambient temperature sensing module is connected to the control module and is used to obtain the ambient temperature and transmit the ambient temperature to the control module;

[0082] The power sensing module is connected to the control module, and is used to obtain the actual output power and the target output power, and transmit the actual output power and the target output power to the control module;

[0083] The dynamic formula module is connected to the control module, and is used to obtain the temperature-capacitance value correspondence relationship of the preset capacitor and the current capacitance value, determine the target temperature according to the current capacitance value and the temperature-capacitance value correspondence relationship, and transmit the current capacitance value and the target temperature to the control module;

[0084] The control module is connected to the heating module, and is used to determine the first difference and the second difference, determine the target heating power of the heating module according to the first difference, the second difference and the current capacitance value, and transmit the target heating power to the heating module;

[0085] The heating module is used to heat the preset capacitor according to the target heating power, and adjust the capacitance value of the preset capacitor to the target capacitance value.

[0086] Specifically, the control module is, for example, a PID (proportional-integral-derivative) control module. Figure 2 As shown, the capacitor control device includes: an ambient temperature sensing module (Temp.Sensor), a power sensing module (Power Sensor), a control module (PID Control), a heating module (Heating Module) and a dynamic formula module (Dynamic Formula). Figure 3 A flow chart of a method for improving the output hold time of a power supply, combined with Figure 3 This embodiment is described.

[0087] The ambient temperature sensing module is connected to the control module and is used to detect the ambient temperature T of the power supply. env , and the ambient temperature T env Transmitted to the control module, which determines the heating demand.

[0088] The power sensing module is connected to the control module to obtain the actual output power P of the PSU. output and the target output power P required , and the actual output power P output and the target output power P required Transmit to the control module, or the actual output power P output and the target output power P required Compare and generate a second difference value, and transmit the second difference value to the control module. Figure 3 As shown, start the power system and monitor the output power demand (P required ).

[0089] The dynamic formula module is connected to the control module and is used to obtain the temperature-capacitance correspondence of the preset capacitor. The temperature-capacitance correspondence can be expressed by a formula that can calculate the gain of the temperature increase on the capacitance. The output holding time is affected by the capacitance value of the preset capacitor. According to the output holding time required by the PSU, the target capacitance value that can maintain the output holding time required by the PSU is determined. Because the capacitance of the aluminum electrolytic capacitor is affected by the ambient temperature, the target temperature corresponding to the target capacitance value is determined according to the formula of the temperature-capacitance correspondence.

[0090] The control module is connected to the heating module and is used to determine the first difference ΔT and the second difference e(t). ΔT represents the error at time T. The error is usually defined as the difference between the set temperature and the actual temperature. According to the first difference ΔT, the second difference e(t) and the current capacitance value C(T), the target heating power of the heating module is determined. For example, the control module calculates and adjusts the heating power P according to the temperature error power error e(t). heat , use PID control formula to adjust the parameters of Kp, Ki, Kd, ​​realize dynamic control, and generate appropriate heating power P heat , the target heating power P heat Transmitted to the heating module to drive the heating module to P heat Heats the preset capacitor. heat represents the rate of heat generation or consumption at time t. This is the amount of heat that the system needs to regulate. Figure 3 As shown, the power error is calculated as e(t) = P required -P output ;PID control calculates heating power P heat , dynamically adjust the heating output according to e(t) and ΔT. In addition, the capacitor control device is also used to check the maintenance effect and demand. If it meets the requirements, it ends, otherwise it readjusts.

[0091] The heating module is used to receive the heating power P from the PID control module. heat , according to P heat Heat the shell of the preset capacitor to increase the working temperature of the preset capacitor to reach the target temperature T target The heating control is realized, and the capacitance value of the preset capacitor is adjusted to the target capacitance value. Finally, the desired capacitance gain effect is achieved.

[0092] In this embodiment, the target heating power is determined, and the heating module heats the preset capacitor according to the target heating power, and adjusts the capacitance value of the preset capacitor to the target capacitance value, so that the preset capacitor adapts to environmental changes and ensures that the aluminum electrolytic capacitor operates within the optimal temperature range, thereby improving its capacitance and energy storage performance.

[0093] In some optional implementations, the ambient temperature sensing module acquires the ambient temperature and transmits the ambient temperature to the control module, including:

[0094] Get the ambient temperature of the power supply;

[0095] When the ambient temperature is lower than the first preset threshold, or the output voltage of the power supply is higher than the second preset threshold, the ambient temperature is transmitted to the control module.

[0096] Specifically, the ambient temperature sensing module includes: a temperature sensor, and may also include: a microcontroller (MCU), a single-chip microcomputer and other components with certain logical computing capabilities, to determine whether it is necessary to send the collected ambient temperature to the ambient temperature sensing module to detect the ambient temperature T outside the power supply. env . External ambient temperature T env is the actual operating environment temperature of the power supply, T env Generally, it is between 0℃-50℃. Some power supplies have more stringent operating temperature requirements. Therefore, T env The value range is set according to actual needs.

[0097] The ambient temperature sensing module determines whether the ambient temperature T env The ambient temperature sensing module can determine whether the ambient temperature T needs to be increased by setting the threshold, whether the heating module can heat stably, whether the capacitance value of the preset capacitor can be maintained at the target temperature, and other judgment conditions. env Sent to the control module. For example: set the first preset temperature threshold, such as 0℃, 5℃ or other values ​​that meet actual needs. If the ambient temperature T env When the ambient temperature is less than the first preset threshold, it indicates that the capacitance value of the subsequent preset capacitor may drop significantly and affect the performance of the power supply. Therefore, the ambient temperature is transmitted to the control module. On the contrary, when the ambient temperature is higher than or equal to the first preset threshold and can be stably maintained at the initial design value, no adjustment is made or the temperature is stably maintained, and there is no need to transmit the ambient temperature to the control module. Under certain working conditions, it is also necessary to adjust the temperature of the preset capacitor, such as determining whether the output holding voltage of the power supply is greater than the second preset threshold. The second preset threshold is, for example, 10V, 11V or other values ​​that meet actual needs. If it is greater than, it means that a higher output holding voltage is required when the PSU is powered off. The temperature of the preset capacitor needs to be adjusted and the ambient temperature is transmitted to the control module.

[0098] In some optional implementations, the capacitance control device further includes: a capacitance temperature sensing module;

[0099] The capacitor temperature sensing module is connected to the dynamic formula module to obtain the current temperature of the preset capacitor and send the current temperature to the dynamic formula module;

[0100] The dynamic formula module obtains the temperature capacitance value correspondence relationship of the preset capacitor and the current capacitance value, determines the target temperature according to the current capacitance value and the temperature capacitance value correspondence relationship, and transmits the current capacitance value and the target temperature to the control module, including:

[0101] Obtaining capacitance values ​​of a preset capacitor at a preset number of temperatures, and generating a temperature-capacitance value curve graph according to the preset number of temperatures and capacitance values, wherein the temperature-capacitance value curve graph includes a temperature-capacitance value correspondence relationship;

[0102] The target temperature is determined according to the correspondence between the current capacitance value and the temperature capacitance value. When the current temperature is lower than the target temperature, the current capacitance value and the target temperature are transmitted to the control module.

[0103] Specifically, Figure 2 As shown, the capacitor control device also includes: a capacitor temperature sensing module (CapTemp.Sensor). The dynamic formula module is responsible for calculating the capacitance gain of the aluminum electrolytic capacitor at different temperatures according to environmental conditions, and adjusting the heating demand according to the gain. Dynamic formula modules include: microcontrollers, single-chip microcomputers, field-programmable gate arrays (Field-Programmable Gate Array, FPGA), microprocessors (Microprocessors, MPU) and other components that can perform more complex logical operations. The dynamic formula module is used to execute the logic code of obtaining the temperature-capacitance value correspondence relationship and the current capacitance value of the preset capacitor, determining the target temperature according to the current capacitance value and the temperature-capacitance value correspondence relationship, and transmitting the current capacitance value and target temperature to the control module. For ease of explanation, the dynamic formula module is divided into multiple functional modules according to the function of the logic code, such as: temperature gain calculation module (Temperature Gain Calculation) and temperature dynamic adjustment module (Dynamic Temperature Control), such as Figure 4 shown.

[0104] The capacitor temperature sensing module is connected to the dynamic formula module to detect the capacitor temperature state, obtain the current temperature of the preset capacitor, and send the current temperature to the dynamic formula module.

[0105] The temperature gain calculation module obtains the capacitance value of the preset capacitor at a preset number of temperatures, such as multiple temperature values ​​between 0°C and 50°C, such as 10, 15, 20 or other values ​​that meet actual needs. The capacitance value of the preset capacitor at each of the above temperatures is obtained, and a temperature-capacitance value curve graph is generated according to the preset number of temperatures and capacitance values. The temperature-capacitance value curve graph includes the corresponding relationship between the temperature and capacitance values, such as Figure 5 As shown, assuming that the initial capacitance value C0 of the preset capacitor is 470 μF at a room temperature of 20° C., the capacitance change rate can be obtained by calculation or according to the temperature capacitance curve according to the temperature influence.

[0106] The temperature dynamic adjustment module is used to dynamically calculate the heating temperature difference ΔT=T target -Tenv , and adjust the temperature control strategy according to the environmental conditions, determine the target temperature according to the correspondence between the current capacitance value and the temperature capacitance value, and transmit the current capacitance value and the target temperature to the control module when the current temperature is lower than the target temperature, so that the PID control module can adjust the power temperature. For example: the ambient temperature of the PSU is 0℃-50℃, compared with the operating temperature of the capacitor component -60℃-105℃, refer to the temperature capacitance value correspondence of the temperature capacitance value curve, and adjust the heating temperature according to the demand according to the influence of the ambient temperature. During the adjustment process, as long as the temperature of the preset capacitor is lower than the target temperature, let the code execute the command to continue to adjust the temperature of the preset capacitor until the demand is met.

[0107] In addition, the temperature gain calculation module is also used to calculate the temperature according to the target temperature T target 、Ambient temperature T env , the initial capacitance value C0 is used to calculate the effect of temperature increase on capacitance, and the heating power is adjusted through the PID control module according to the capacitance gain.

[0108] In this embodiment, as long as the current temperature of the preset capacitor is lower than the target temperature, the dynamic formula module transmits the current capacitance value and the target temperature to the control module, and the control module dynamically adjusts the temperature of the preset capacitor to increase the capacitance of the preset capacitor, thereby improving the stability and efficiency of the power supply.

[0109] In some optional embodiments, the control module determines the first difference, determines the target heating power of the heating module according to the first difference, the second difference and the current capacitance value, and transmits the target heating power to the heating module, including:

[0110] determining a first difference between the target temperature and the ambient temperature;

[0111] The preset control parameters and the initial capacitance value C0 of the preset capacitance are obtained, and the target heating power of the heating module is determined according to the first difference, the second difference, the preset control parameters, the initial capacitance value and the current capacitance value, and the target heating power is transmitted to the heating module.

[0112] Specifically, the control module is, for example, a PID control module. The dynamic formula module may include at least one component that can perform relatively complex logic operations and has a control function, such as a microcontroller, a single-chip microcomputer, a microprocessor, a programmable logic controller (PLC), etc.

[0113] The control module is used to determine the first difference, determine the target heating power of the heating module according to the first difference, the second difference and the current capacitance value, and transmit the target heating power to the logic code of the heating module. For the convenience of explanation, the control module is divided into multiple functional modules according to the function of the logic code, such as: a power error calculation module (Power Error Calculation) and a PID control algorithm module (PID Algorithm Module), such as Figure 6 shown.

[0114] The power error calculation module is used to calculate the first difference ΔT between the target temperature and the ambient temperature, for example: ΔT = T target -T env .

[0115] The control algorithm module is used to obtain the preset control parameters and the initial capacitance value of the preset capacitor. The preset control parameters are, for example, PID control parameters, including K p Proportional Gain determines the intensity of the system's response to the current error. It is a proportional control term, which means that the system immediately adjusts the heat according to the current error. K i Integral Gain: Integral control term, indicating that the system adjusts the heat according to the accumulated error of all past time. Integral control helps to eliminate steady-state error. K d Derivative Gain is a differential control term, which means that the system adjusts the heat according to the rate of change of the error. The differential control helps the system respond quickly to rapidly changing errors. The control algorithm module obtains the temperature compensation coefficients, such as α and β. The specific values ​​of α and β are set according to actual needs.

[0116] The temperature compensation coefficient, the first difference, the second difference, the preset control parameter, the initial capacitance value and the current capacitance value are input into the preset control formula to calculate the target heating power P heat The preset control formula is shown in formula (1).

[0117]

[0118] Among them, K p , K i and K d is the preset control parameter, α and β are the temperature compensation coefficients, e(t) is the second difference, Δt is the first difference, C(T) is the current capacitance value, C0 is the initial capacitance value, Represents the effect of temperature increase on capacitance gain.

[0119] Formula (1) is an expression of a PID (proportional-integral-differential) controller, which is used here to adjust the heat generation or consumption in the temperature control system. By adjusting the proportional, integral and differential gains, the system can reach the set temperature more stably and accurately. The adjustment method is to calculate and control the received data as a design practice method.

[0120] In this embodiment, the control module determines the target heating power of the heating module, and transmits the target heating power to the heating module to heat the preset capacitor, increase the temperature of the preset capacitor, and make the capacitance value of the preset capacitor reach the target capacitance value, so as to achieve adaptive gain of the capacitance value of the preset capacitor in temperature and power control.

[0121] In some optional embodiments, the power supply includes: a filter module, a rectifier module, a power factor correction module, a pulse width modulation module, a transformer module, an output rectifier module, an anti-reverse injection protection module and a DC output module;

[0122] The power factor correction module includes a preset capacitor;

[0123] The DC output module is used to output a DC voltage to a target load to provide power for the target load.

[0124] Specifically, this embodiment designs a heating control circuit as a heating module, and a heating device such as a heater, a heating film, a heating sheet, etc. is installed in the heating module. The heating device covers the cylindrical shell of a preset capacitor for energy storage in the power supply, and the preset capacitor is, for example, an aluminum electrolytic capacitor, such as Figure 7 C2 in the power factor correction module. Dynamically adjust the heating power through PID control to cope with different temperature and load conditions, and maximize the capacitance value of the preset capacitor to achieve stable output maintenance time.

[0125] like Figure 7 As shown, the power supply (PSU) includes a filter module, a rectifier module, a power factor correction module, a pulse width modulation module, a transformer module, an output rectifier module, an anti-reverse protection module and a DC output module. The power supply is used to convert AC input into DC output and supply power to the load resistor R (Load). The AC input enters the power supply through L (Live Wire) and N (Neutral Wire).

[0126] The filter module removes electromagnetic interference through an EMI (Electromagnetic Interference) filter, which is a device used to reduce or eliminate unwanted electromagnetic energy generated in electronic equipment. The rectifier module uses a BD bridge rectifier to convert AC power into pulsating DC power. C1 is the capacitor of the power supply. The "BypassDiode" power factor correction module is a circuit composed of an inductor L1, a diode D1, a switch tube Q1 and a capacitor C2, which is used to improve the power factor. Capacitor C2 is a preset capacitor that needs to adjust the temperature. The pulse width modulation module adjusts the output voltage by controlling the on and off time of the switch tube (Q2 and Q3). The transformer module uses transformer T1 to step down the voltage and provide electrical isolation. Output rectifier module: uses diodes (D3 and D4) to rectify the AC power into DC power again. The anti-reverse protection module (Oring-FET, ideal diode controller) prevents reverse current through the field effect tube Q4. DC output module: provides a stable DC voltage to the load, such as the load resistor R.

[0127] In some optional implementations, the capacitance control device further includes: a power factor sensing module;

[0128] The power factor sensing module is connected to the dynamic formula module, and is used to obtain the current power factor of the preset capacitor and send the current power factor to the dynamic formula module;

[0129] The dynamic formula module is used to transmit the current capacitance value and the target temperature to the control module when the current temperature is lower than the target temperature or the current power factor is lower than the third preset threshold.

[0130] Specifically, Figure 8 As shown, the capacitor control device also includes: a power factor sensing module (PF.Sensor). In the power supply, increasing the capacitance value of the preset capacitor can effectively compensate for the reactive power Q, reduce the phase angle θ, and thus improve the power factor. The power factor is directly related to the temperature and capacitance of the heated aluminum electrolytic capacitor. Therefore, in order to further improve the stability of the aluminum electrolytic capacitor, the temperature control heating technology of this solution can be integrated into the PFC design to achieve a more stable power factor (PF>0.95) by dynamically adjusting the heating state of the output capacitor.

[0131] The above embodiment dynamically adjusts the temperature T envTo affect the capacitance C(t) of the preset capacitor. Then control the power factor (PF), meet the needs of different load changes, and achieve the best balance between dynamically adjusting the capacitance value and the output power. This embodiment adds a power factor sensing module to the capacitor control device, and at the same time detects the current power factor of the preset capacitor, obtains the current power factor of the preset capacitor, and sends the current power factor to the dynamic formula module.

[0132] When the current temperature of the dynamic formula module is lower than the target temperature, it indicates that the temperature of the preset capacitor is too low, which will cause the capacitance value of the preset capacitor to drop significantly and affect the performance of the PSU. The current capacitance value and the target temperature are transmitted to the control module, which regulates the temperature of the preset capacitor to increase the capacitance value of the preset capacitor. The third preset threshold value is, for example, 0.95, 0.90 or other values ​​that meet the requirements. When the current power factor is lower than the third preset threshold value, it indicates that the power factor of the preset capacitor in the PSU is too low, the PSU performance is unstable, and the preset capacitor needs to be adjusted. The current capacitance value and the target temperature are also transmitted to the control module.

[0133] In this embodiment, by designing an external heating and temperature control mechanism for the aluminum electrolytic capacitor, the power supply can operate stably in different environments, while improving the output maintenance time. In addition, a power factor sensing module is introduced to obtain the current power factor of the preset capacitor, and it is determined whether to transmit the current capacitance value and the target temperature to the control module according to the current power factor, so as to control the temperature and capacitance of the preset capacitor. The energy storage performance of the preset capacitor is improved without increasing the capacitor volume, and the preset capacitor maintains the optimal power factor, thereby improving the overall power efficiency.

[0134] In some optional implementations, the dynamic formula module is further used to generate capacitance prediction values ​​of a preset capacitor at a preset number of temperatures according to a temperature capacitance value curve graph;

[0135] The control module is also used to adjust preset control parameters according to the predicted capacitance value.

[0136] Specifically, Figure 6 As shown, another functional module can be divided out in the control module according to the corresponding logic code, for example: Adaptive PID Adjustment module, i.e., control parameter adjustment module. Figure 4 As shown, another functional module may be divided out in the dynamic formula module according to the corresponding logic code, for example, a capacitance prediction module (Capacitance Prediction).

[0137] The capacitance estimation module is used to estimate the capacitance change of aluminum electrolytic capacitors at different temperatures according to the output of the temperature gain calculation module (such as the temperature capacitance curve), and generate capacitance prediction values ​​of the preset capacitors at a preset number of temperatures. The preset number of temperatures is, for example, multiple temperature values ​​between 0℃-50℃, and the preset number is, for example, 10, 15, 20 or other values ​​that meet actual needs. Figure 5 As shown in the figure, when the temperature is 20°C, the predicted capacitance value is the initial capacitance value C0; when the temperature is -40°C, the predicted capacitance value is (100-8)% of the initial capacitance value C0, that is, the predicted capacitance value is C0×92%; when the temperature is 80°C, the predicted capacitance value is (100+7)% of the initial capacitance value C0, that is, the predicted capacitance value is C0×107%. For details, see Fig. 9 , I will not go into details here.

[0138] In addition, since the capacitance of electrolytic capacitors will decay after long-term use, a trend is formed by the duration of input power failure and the capacitance change under different temperatures. The capacitance estimation module can also estimate the capacitance decay rate.

[0139] The control parameter adjustment module is used to adjust the preset control parameters according to the predicted value of the capacitance and dynamically adjust the heating intensity. For example, the adjustment method can be used to use the code table lookup method to adjust the corresponding temperature and power requirements. When the power is high, the maintenance time is shortened, and the temperature control is automatically performed. Because this solution is aimed at the output maintenance time when the power is off in a high power and low temperature environment, the adjustment range. The preset control parameters that are automatically adjusted are, for example, PID parameters, such as K p , K i and K d , to adapt to dynamically changing ambient temperature and power requirements.

[0140] In this embodiment, the control module adjusts the preset control parameters according to the capacitance prediction value of the preset capacitor by the dynamic formula module to adapt to the dynamically changing ambient temperature and power requirements, thereby improving the accuracy and control efficiency of dynamically controlling the preset capacitor temperature and capacitance value.

[0141] In some optional implementations, the dynamic formula module is further used to:

[0142] Obtaining a corresponding relationship between a capacitance value of a preset capacitor and an output holding time of a power supply;

[0143] Generate a temperature maintenance time curve according to the temperature capacitance value curve and the corresponding relationship;

[0144] Determine the target temperature based on the temperature maintenance time curve and the target output maintenance time.

[0145] Specifically, the dynamic formula module obtains the corresponding relationship between the capacitance value of the preset capacitor and the output holding time of the power supply, such as: output holding time = output holding voltage ÷ output holding current × capacitance value of the preset capacitor, or other relationships that meet actual needs.

[0146] For example, a graph of capacitance versus temperature: Figure 5 The temperature capacitance value curve is shown in the figure. The dynamic formula module determines the corresponding capacitance value according to the ordinate of each sampling point in the temperature capacitance value curve, and then calculates the corresponding output maintenance time according to the capacitance value and the corresponding relationship. The ordinate of the temperature capacitance value curve is modified from the capacitance change value to the output maintenance time to generate a temperature maintenance time curve, such as Fig. 9 As shown, the preset capacitor temperature is 50°C, the corresponding output holding time is 11.15ms, the preset capacitor temperature is 70°C, the corresponding output holding time is 11.42ms, for details, see Fig. 9 , Fig. 9 The target output holding time is 1 1ms, which will not be described here.

[0147] The dynamic formula module determines the target temperature based on the temperature maintenance time curve and the target output maintenance time. For example, if the target output maintenance time is 11.4ms, then Fig. 9 From the numerical curve of the output holding time, it can be determined that the corresponding target temperature is 68°C.

[0148] Take an 800W power supply (PSU) as an example. The power supply uses a 450VDC / 470uF aluminum electrolytic capacitor. Without considering the tolerance problem, the output is at 100% load. According to the following formula and design value, the holding time can be calculated to be 11ms.

[0149] P=0.5×C×ΔV 2 ×f (2)

[0150] Among them, P is power (Power), the unit is W; C is capacitance (Capacitance), the unit is μF; ΔV is voltage change (Voltage Change), the unit is V; f is frequency (Frequency), the unit is Hz.

[0151] According to the temperature-to-capacitance gain formula in the above steps and the reference Figure 5 The curve changes can be used to calculate the capacitance change at different temperatures and evaluate the impact on the output holding time. Fig. 9 The temperature-capacitance value change curve and the maintenance time curve shown in the figure demonstrate the output maintenance time of the capacitor at different temperatures, maximizing the functional benefits of the aluminum electrolytic capacitor in use.

[0152] In some optional embodiments, the process of the capacitor control device determining the current capacitance value of a preset capacitor in a power supply may include: the capacitor control device applies a bias voltage to the preset capacitor and loads an AC power supply; the capacitor control device obtains the instantaneous value data of the AC voltage and current across the preset capacitor; performs numerical processing based on the instantaneous value data to obtain the current capacitance value of the capacitor, and may also obtain the loss value, equivalent series resistance, reactance and other parameters of the preset capacitor.

[0153] The capacitor temperature sensing module includes: a chip thermistor or a temperature sensor. The temperature sensor can monitor the temperature near the preset capacitor and directly use the nearby temperature as the current temperature of the preset capacitor, or determine in advance the relationship between the temperature collected by the temperature sensor and the actual temperature of the preset capacitor, and then collect the current temperature of the preset capacitor in real time. The current temperature of the preset capacitor is determined based on the relationship and the nearby temperature. The chip thermistor is directly attached to the surface of the preset capacitor or near it, which can directly and more accurately measure the current temperature of the preset capacitor.

[0154] In this embodiment, the current capacitance value and current temperature of the preset capacitor are collected, and the collection method is stable, reliable and highly accurate. The preset capacitor can also be monitored online in real time to provide accurate information of the preset capacitor to the control module and dynamic formula module in the capacitor control device, so as to facilitate temperature and capacitance control of the preset capacitor.

[0155] According to an embodiment of the present invention, a test embodiment is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a capacitance control device with data processing capabilities, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0156] In this embodiment, a power supply method is provided, which is applied to a capacitor control device. Fig.10 is a flow chart of a power supply method according to an embodiment of the present invention. Fig.10 As shown, the process includes the following steps:

[0157] Step S1001, obtaining the ambient temperature, actual output power and target output power of the power supply, and determining the current capacitance value of a preset capacitor in the power supply and the target temperature corresponding to the current capacitance value.

[0158] Specifically, the preset capacitor is an aluminum electrolytic capacitor in a power supply (PSU). Because the preset capacitor in the power supply is an aluminum electrolytic capacitor, the capacitance of the aluminum electrolytic capacitor is greatly affected by the ambient temperature. In addition to obtaining the actual output power and target output power of the power supply, the capacitor control device also needs to obtain the ambient temperature of the preset capacitor.

[0159] The capacitor control device determines the output hold-up time (Hold-up Time) required by the PSU, for example: the output hold-up time is maintained for 10ms at full power output. Determine the current capacitance value of the preset capacitor. The output hold-up time is affected by the capacitance value of the preset capacitor. According to the output hold-up time required by the PSU, the target capacitance value of the preset capacitor is determined. Because the capacitance value of the aluminum electrolytic capacitor is affected by the ambient temperature, the current capacitance value of the preset capacitor is determined. Based on the known relationship between capacitance and temperature, the target capacitance value that can maintain the output hold-up time required by the PSU is determined. Determine the target temperature corresponding to the target capacitance value based on the relationship between capacitance and temperature.

[0160] Step S1002, determining a first difference between the target temperature and the ambient temperature, and a second difference between the actual output power and the target output power, and adjusting the capacitance value of the preset capacitor to the target capacitance value based on the first difference, the second difference and the current capacitance value, so that the power supply supplies power to the target load based on the preset capacitor with the capacitance value being the target capacitance value.

[0161] Specifically, the capacitance control device calculates a first difference between the target temperature and the ambient temperature, and calculates a second difference between the actual output power and the target output power. The capacitance control device adjusts the capacitance value of the preset capacitor to the target capacitance value according to the first difference and the second difference. For example, there is a heating control circuit in the capacitance control device. The heating device (such as a heater, a heating film, a heating sheet, etc.) in the heating control circuit covers the cylindrical shell of the preset capacitor, and can heat the shell of the preset capacitor to increase the temperature of the preset capacitor and thus increase the capacitance value of the preset capacitor. According to the first difference and the second difference, the heating power of the heating device is determined so that the temperature of the preset capacitor reaches the target temperature. At this time, the capacitance value of the preset capacitor is the current capacitance value; or, the preset capacitor in the power supply is an electronically adjustable variable capacitor. The capacitance control device can directly adjust the capacitance value of the variable capacitor according to the second difference so that it increases the second difference and reaches the current capacitance value.

[0162] The power supply converts input alternating current (AC) into stable direct current (DC) based on a preset capacitor having a current capacitance value to supply power to a target load, such as various components inside a computer device, various components inside a home appliance device, etc.

[0163] In the power supply method provided in this embodiment, the capacitance control device makes the capacitance of the preset capacitor still reach the target capacitance value under the influence of the environment according to the first difference between the target temperature and the ambient temperature, the second difference between the actual output power and the target output power, and the current capacitance value of the preset capacitor in the power supply, thereby improving the performance of the power supply, enabling the power supply to operate stably under different environments, and at the same time improving the output maintenance time of the power supply. The problem that the aluminum electrolytic battery in the power supply is easily affected by the environment, resulting in poor performance of the power supply, is solved.

[0164] In this embodiment, a test device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0165] This embodiment provides a testing device, such as Fig.11 As shown, including:

[0166] The determination module 1101 is used to obtain the ambient temperature, actual output power and target output power of the power supply, and determine the current capacitance value of the preset capacitor in the power supply and the target temperature corresponding to the current capacitance value;

[0167] The control module 1102 is used to determine a first difference between the target temperature and the ambient temperature, and a second difference between the actual output power and the target output power, and to control the capacitance value of the preset capacitor to be the target capacitance value based on the first difference, the second difference and the current capacitance value, so that the power supply supplies power to the target load based on the preset capacitor with the capacitance value being the target capacitance value.

[0168] The further functional description of each of the above modules is the same as that of the above corresponding embodiments and will not be repeated here.

[0169] The test device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0170] The embodiment of the present invention also provides a computer device having the above Fig.11 The test setup is shown.

[0171] See also Fig.12 , Fig.12is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Fig.12 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Fig.12 A processor 10 is taken as an example.

[0172] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0173] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0174] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0175] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0176] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0177] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0178] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0179] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined in this application.

Claims

1. A power supply system, characterized in that: The system comprises: a capacitance control device and a power supply; The capacitance control device is used to obtain the ambient temperature, actual output power and target output power of the power supply, and determine the current capacitance value of the preset capacitor in the power supply and the target temperature corresponding to the current capacitance value; The capacitance control device is used to determine a first difference between the target temperature and the ambient temperature, and a second difference between the actual output power and the target output power, and to control the capacitance value of the preset capacitance to be the target capacitance value according to the first difference, the second difference and the current capacitance value; The power supply is used to supply power to a target load based on a preset capacitor having a capacitance value equal to the target capacitance value.

2. The system according to claim 1, characterized in that The capacitance control device includes: an ambient temperature sensing module, a power sensing module, a control module, a heating module and a dynamic formula module; The ambient temperature sensing module is connected to the control module, and is used to obtain the ambient temperature and transmit the ambient temperature to the control module; The power sensing module is connected to the control module, and is used to obtain the actual output power and the target output power, and transmit the actual output power and the target output power to the control module; The dynamic formula module is connected to the control module, and is used to obtain the temperature-capacitance value correspondence relationship of the preset capacitor and the current capacitance value, determine the target temperature according to the current capacitance value and the temperature-capacitance value correspondence relationship, and transmit the current capacitance value and the target temperature to the control module; The control module is connected to the heating module, and is used to determine the first difference and the second difference, determine the target heating power of the heating module according to the first difference, the second difference and the current capacitance value, and transmit the target heating power to the heating module; The heating module is used to heat the preset capacitor according to the target heating power, and adjust the capacitance value of the preset capacitor to be the target capacitance value.

3. The system according to claim 2, characterized in that The ambient temperature sensing module acquires the ambient temperature and transmits the ambient temperature to the control module, including: Acquiring the ambient temperature of the power supply; When the ambient temperature is lower than a first preset threshold, or when the output voltage of the power supply is higher than a second preset threshold, the ambient temperature is transmitted to the control module.

4. The system according to claim 2, characterized in that The capacitance control device further includes: a capacitance temperature sensing module; The capacitor temperature sensing module is connected to the dynamic formula module, and is used to obtain the current temperature of the preset capacitor and send the current temperature to the dynamic formula module; The dynamic formula module obtains the temperature-capacitance value correspondence relationship of the preset capacitor and the current capacitance value, determines the target temperature according to the current capacitance value and the temperature-capacitance value correspondence relationship, and transmits the current capacitance value and the target temperature to the control module, including: Acquire capacitance values ​​of the preset capacitor at a preset number of temperatures, and generate a temperature-capacitance value curve graph according to the preset number of temperatures and the capacitance values, wherein the temperature-capacitance value curve graph includes the temperature-capacitance value correspondence relationship; The target temperature is determined according to the correspondence between the current capacitance value and the temperature capacitance value, and when the current temperature is less than the target temperature, the current capacitance value and the target temperature are transmitted to the control module.

5. The system according to claim 2, characterized in that The control module determines the first difference, determines the target heating power of the heating module according to the first difference, the second difference and the current capacitance value, and transmits the target heating power to the heating module, including: determining the first difference between the target temperature and the ambient temperature; Obtain the preset control parameters and the initial capacitance value of the preset capacitor, and determine the target heating power of the heating module based on the first difference, the second difference, the preset control parameters, the initial capacitance value and the current capacitance value, and transmit the target heating power to the heating module.

6. The system according to claim 1, characterized in that The power supply comprises: a filter module, a rectifier module, a power factor correction module, a pulse width modulation module, a transformer module, an output rectifier module, an anti-reverse feeding protection module and a DC output module; The power factor correction module includes the preset capacitor; The DC output module is used to output a DC voltage to the target load to provide power for the target load.

7. The system according to claim 4, characterized in that The capacitance control device further includes: a power factor sensing module; The power factor sensing module is connected to the dynamic formula module, and is used to obtain the current power factor of the preset capacitor and send the current power factor to the dynamic formula module; The dynamic formula module is used to transmit the current capacitance value and the target temperature to the control module when the current temperature is less than the target temperature or the current power factor is less than a third preset threshold.

8. The system according to claim 4, characterized in that The dynamic formula module is also used to generate a capacitance prediction value of the preset capacitor at the preset number of temperatures according to the temperature capacitance value curve graph; The control module is further used to adjust a preset control parameter according to the capacitance prediction value.

9. The system according to claim 4, characterized in that The dynamic formula module is also used to: Obtaining a corresponding relationship between a capacitance value of the preset capacitor and an output maintenance time of the power supply; Generate a temperature maintenance time curve according to the temperature capacitance value curve graph and the corresponding relationship; The target temperature is determined according to the temperature maintenance time curve and the target output maintenance time.

10. A power supply method, characterized in that: The method is applied to a capacitance control device, and the method comprises: Acquiring an ambient temperature, an actual output power, and a target output power of a power supply, and determining a current capacitance value of a preset capacitor in the power supply and a target temperature corresponding to the current capacitance value; Determine a first difference between the target temperature and the ambient temperature, and a second difference between the actual output power and the target output power, and adjust the capacitance value of the preset capacitor to the target capacitance value based on the first difference, the second difference and the current capacitance value, so that the power supply supplies power to the target load based on the preset capacitor with the capacitance value of the target capacitance value.

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