Power supply system and electric equipment

Abstract

The invention discloses a power supply system and electric equipment, and belongs to the field of power design. For a first voltage conversion module and a load module which are in common board design, firstly, no electric connection is set between the reference ground of the output end of the first voltage conversion module and the reference ground of the load module; an output voltage of a power supply is converted into a direct-current voltage of a target specification through a first voltage conversion module, and then a positive voltage output end of the first voltage conversion module is connected to a reference ground of a load module, and the reference ground of the first voltage conversion module is connected to a negative voltage input end of the load module. The positive voltage output by the first voltage conversion module is converted into the negative voltage received by the load module, so that negative voltage power supply is achieved, negative voltage power supply is achieved through'design of reference ground and connection relation 'of the independent first voltage conversion module, the number of used devices is small, and therefore the size and cost of the whole power supply system are reduced.

Description

Technical Field

[0001] The present invention relates to the field of power supply design, and in particular to a power supply system and power-consuming equipment. Background Art

[0002] Negative voltage refers to a voltage whose potential is lower than "zero potential or reference potential". Many loads need to work based on negative voltage. However, the relevant technology lacks a mature power supply system, resulting in the negative voltage supply module in the power supply system that provides negative voltage to the load module usually having problems such as large size and high cost.

[0003] Therefore, how to provide a solution to the above technical problems is a problem that those skilled in the art need to solve at present. Summary of the invention

[0004] The object of the present invention is to provide a power supply system and an electrical equipment. First, no electrical connection is set between the reference ground of the output end of the first voltage conversion module and the reference ground of the load module. The output voltage of the power supply is converted into a DC voltage of a target specification by the first voltage conversion module. Then, by "connecting the positive voltage output end of the first voltage conversion module to the reference ground of the load module and connecting the reference ground of the first voltage conversion module to the negative voltage input end of the load module", the positive voltage output by the first voltage conversion module is converted into a negative voltage received by the load module, thereby realizing negative voltage power supply. Negative voltage power supply is realized by "designing the reference ground and connection relationship" of the separate first voltage conversion module. Fewer devices are used, thereby reducing the volume and cost of the entire power supply system.

[0005] In order to solve the above technical problems, the present invention provides a power supply system, including a circuit substrate and a first voltage conversion module;

[0006] The input end of the first voltage conversion module is used to connect to a power supply, the positive voltage output end of the first voltage conversion module is connected to a reference ground of a load module, the reference ground of the output end of the first voltage conversion module is connected to a negative voltage input end of the load module, and there is no electrical connection between the reference ground of the output end of the first voltage conversion module and the reference ground of the load module;

[0007] The first voltage conversion module is used to convert the output voltage of the power supply into a DC voltage of target specifications and output it;

[0008] The circuit substrate is used for arranging the voltage conversion module and the load module.

[0009] On the other hand, the power supply system also includes a second voltage conversion module;

[0010] The second voltage conversion module is arranged on the circuit substrate, the input end of the second voltage conversion module is used to connect the power supply, the positive voltage output end of the second voltage conversion module is connected to the positive voltage input end of the load module, and the reference ground of the output end of the second voltage conversion module is connected to the reference ground of the load module;

[0011] The second voltage conversion module is used to convert the output voltage of the power supply into a voltage of a target specification and output it.

[0012] On the other hand, the first voltage conversion module includes a voltage conversion unit, an energy storage module and a first filtering circuit;

[0013] The input end of the first filter circuit is used to connect to the power supply, the output end of the first filter circuit is connected to the first end of the energy storage module, the second end of the energy storage module is connected to the input end of the voltage conversion unit, the positive voltage output end of the voltage conversion unit serves as the positive voltage output end of the first voltage conversion module, and the reference ground of the output end of the voltage conversion unit serves as the reference ground of the output end of the first voltage conversion module;

[0014] A first filter circuit, used for filtering the output voltage of the power supply;

[0015] Energy storage module, used to store and release electrical energy;

[0016] The voltage conversion unit is used to convert the received voltage into a DC voltage of target specifications and output it.

[0017] On the other hand, the first voltage conversion module further includes a second filtering circuit;

[0018] The common end formed by the first end of the second filter circuit and the positive voltage output end of the voltage conversion unit is used as the positive voltage output end of the first voltage conversion module; the common end formed by the second end of the second filter circuit and the reference ground of the output end of the voltage conversion unit is used as the reference ground of the output end of the first voltage conversion module;

[0019] The second filtering circuit is used to filter the output voltage of the voltage conversion unit.

[0020] On the other hand, the first filtering circuit comprises:

[0021] A first adjustable capacitor, used for changing its capacitance value in a controlled manner;

[0022] The first adjustable capacitor comprises:

[0023] A multi-stage capacitor and a controllable switch corresponding to each of the capacitors;

[0024] The capacitor and the controllable switch corresponding thereto constitute a capacitor branch, the first end of the capacitor branch is respectively connected to the output positive electrode of the power supply and the first end of the energy storage module, the second end of the capacitor branch is respectively connected to the output negative electrode of the power supply, the reference ground of the input end of the first voltage conversion module and the negative electrode of the input end of the electric energy conversion unit, and the second end of the energy storage module is connected to the positive electrode of the input end of the electric energy conversion unit;

[0025] The controllable switch is used to change its on-off state under the control of the control signal so as to switch the connection state of the capacitor in the capacitor branch;

[0026] The multi-stage capacitor comprises:

[0027] The first-level capacitor is used to filter out low-frequency interference in the output voltage of the power supply when the controllable switch in the capacitor branch is closed individually;

[0028] The second-stage capacitor is used to filter out intermediate frequency interference in the output voltage of the power supply when the controllable switch in the capacitor branch is closed alone;

[0029] The third-level capacitor is used to filter out high-frequency interference in the output voltage of the power supply when the controllable switch in the capacitor branch is closed alone;

[0030] The capacitance of the first-level capacitor is in the microfarad level, the capacitance of the second-level capacitor is in the nanofarad level, and the capacitance of the third-level capacitor is in the nanofarad level.

[0031] On the other hand, the second filtering circuit:

[0032] A second adjustable capacitor is included, which is used to controllably change its capacitance value;

[0033] The second adjustable capacitor comprises:

[0034] A multi-stage capacitor and a controllable switch corresponding to each of the capacitors;

[0035] The capacitor and the corresponding controllable switch form a capacitor branch, the first end of the capacitor branch is connected to the positive voltage output end of the voltage conversion unit and serves as the positive voltage output end of the first voltage conversion module, and the second end of the capacitor branch and the output negative electrode of the voltage conversion unit form a common end, which together serve as a reference ground for the output end of the first voltage conversion module;

[0036] The controllable switch is used to change its on-off state under the control of the control signal so as to switch the connection state of the capacitor in the capacitor branch;

[0037] The multi-stage capacitor comprises:

[0038] The first-stage capacitor is used to filter out low-frequency interference in the output voltage of the voltage conversion unit when the controllable switch in the capacitor branch is closed alone;

[0039] The second-stage capacitor is used to filter out intermediate frequency interference in the output voltage of the voltage conversion unit when the controllable switch in the capacitor branch is closed alone;

[0040] The third-level capacitor is used to filter out high-frequency interference in the output voltage of the voltage conversion unit when the controllable switch in the capacitor branch is closed alone;

[0041] The capacitance of the first-level capacitor is in the microfarad level, the capacitance of the second-level capacitor is in the nanofarad level, and the capacitance of the third-level capacitor is in the nanofarad level.

[0042] On the other hand, the load module includes a radio frequency switch.

[0043] On the other hand, the voltage conversion unit includes a DC-DC converter;

[0044] The DC-DC converter is used to convert a DC voltage provided by a power supply into a DC voltage of a target specification.

[0045] On the other hand, the power supply system also includes an insulation module;

[0046] The insulating module is located on the circuit substrate, and the insulating module is arranged between the reference ground of the first voltage conversion module and the reference ground of the demand module;

[0047] The insulating module is used to block the flow of current.

[0048] In order to solve the above technical problems, the present invention further provides an electrical device, including a load module and also including the above power supply system connected to the load module.

[0049] Beneficial effect: The present invention provides a power supply system. For the first voltage conversion module and the load module designed with a common board, the present invention first does not set an electrical connection between the reference ground of the output end of the first voltage conversion module and the reference ground of the load module, and converts the output voltage of the power supply into a DC voltage of a target specification through the first voltage conversion module. Then, by "connecting the positive voltage output end of the first voltage conversion module to the reference ground of the load module, and connecting the reference ground of the first voltage conversion module to the negative voltage input end of the load module", the positive voltage output by the first voltage conversion module is converted into a negative voltage received by the load module, thereby realizing negative voltage power supply. Negative voltage power supply is realized by "designing the reference ground and connection relationship" of the separate first voltage conversion module, and fewer devices are used, thereby reducing the volume and cost of the entire power supply system.

[0050] The present invention also provides an electrical device having the same beneficial effects as the above power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the relevant technologies and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0052] Figure 1 A schematic diagram of the structure of a power supply system provided by the present invention;

[0053] Figure 2 A schematic diagram of the structure of another power supply system provided by the present invention;

[0054] Figure 3 A schematic diagram of the structure of a first voltage conversion module provided by the present invention;

[0055] Figure 4 A schematic structural diagram of another first voltage conversion module provided by the present invention. DETAILED DESCRIPTION

[0056] The core of the present invention is to provide a power supply system and an electrical device. First, no electrical connection is set between the reference ground of the output end of the first voltage conversion module and the reference ground of the load module. The output voltage of the power supply is converted into a DC voltage of a target specification by the first voltage conversion module. Then, by "connecting the positive voltage output end of the first voltage conversion module to the reference ground of the load module and connecting the reference ground of the first voltage conversion module to the negative voltage input end of the load module", the positive voltage output by the first voltage conversion module is converted into a negative voltage received by the load module, thereby realizing negative voltage power supply. Negative voltage power supply is realized by "designing the reference ground and connection relationship" of a separate first voltage conversion module. Fewer devices are used, thereby reducing the volume and cost of the entire power supply system.

[0057] 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a power supply system provided by the present invention, the power supply system comprises a circuit substrate 1 and a first voltage conversion module 2;

[0059] The input end of the first voltage conversion module 2 is used to connect to the power supply, the positive voltage output end of the first voltage conversion module 2 is connected to the reference ground of the load module, the reference ground of the output end of the first voltage conversion module 2 is connected to the negative voltage input end of the load module, and there is no electrical connection between the reference ground of the output end of the first voltage conversion module 2 and the reference ground of the load module;

[0060] A first voltage conversion module 2, used for converting the output voltage of the power supply into a DC voltage of target specification and outputting it;

[0061] The circuit substrate 1 is used for arranging the voltage conversion module and the load module.

[0062] Specifically, considering the technical problems in the above background technology, and considering that for the first voltage conversion module 2 that outputs a positive voltage, "connecting the positive voltage output terminal of the first voltage conversion module 2 to the reference ground of the load module, and connecting the reference ground of the first voltage conversion module 2 to the negative voltage input terminal of the load module", not only can the voltage difference at the output terminal of the first voltage conversion module 2 be transmitted to the load module, but also because "for the load module, the potential of the negative voltage input terminal is always lower than the reference ground", and the reference ground of the load module can be regarded as zero potential, so a negative voltage input can be formed at the negative voltage input terminal of the load module; however, if the "first voltage conversion module 2" on the same circuit substrate 1 is connected The first voltage conversion module 2 and the load module are designed to share the same ground. The above connection method will result in "the positive voltage output terminal of the first voltage conversion module 2 being directly connected to its own reference ground", which will cause a short circuit. Therefore, although the first voltage conversion module 2 in the embodiment of the present invention shares the same board with the load module, firstly, the "reference ground of the first voltage conversion module 2 and the reference ground of the load module" are not electrically connected. Then, on this basis, the first voltage conversion module 2 is connected to the load module in the manner of "connecting the positive voltage output terminal of the first voltage conversion module 2 to the reference ground of the load module, and connecting the reference ground of the first voltage conversion module 2 to the negative voltage input terminal of the load module", so as to realize the negative voltage transmission to the load module.

[0063] Among them, it can be intuitively seen that in the power supply system in the embodiment of the present invention, a negative voltage can be provided for the load module through the "reference ground design (that is, not electrically connected to the reference ground of the load module)" and "connection relationship setting (that is, connection relationship with the load module)" of the separate first voltage conversion module 2, and fewer devices are used, thereby reducing the volume and cost of the power supply system.

[0064] The present invention provides a power supply system. For a first voltage conversion module and a load module designed on a common board, the present invention first does not set an electrical connection between the reference ground of the output end of the first voltage conversion module and the reference ground of the load module, converts the output voltage of the power supply into a DC voltage of a target specification through the first voltage conversion module, and then converts the positive voltage output by the first voltage conversion module into a negative voltage received by the load module by “connecting the positive voltage output end of the first voltage conversion module to the reference ground of the load module and connecting the reference ground of the first voltage conversion module to the negative voltage input end of the load module”, thereby realizing negative voltage power supply. Negative voltage power supply is realized by “designing the reference ground and connection relationship” of the separate first voltage conversion module, and fewer devices are used, thereby reducing the volume and cost of the entire power supply system.

[0065] Based on the above embodiments:

[0066] As an optional embodiment, the power supply system further includes a second voltage conversion module 3;

[0067] The second voltage conversion module 3 is arranged on the circuit substrate 1, the input end of the second voltage conversion module 3 is used to connect to the power supply, the positive voltage output end of the second voltage conversion module 3 is connected to the positive voltage input end of the load module, and the reference ground of the output end of the second voltage conversion module 3 is connected to the reference ground of the load module;

[0068] The second voltage conversion module 3 is used to convert the output voltage of the power supply into a voltage of a target specification and output it.

[0069] Specifically, in order to better illustrate the embodiments of the present invention, please refer to Figure 2 , Figure 2 A schematic structural diagram of another power supply system provided by the present invention.

[0070] Specifically, considering that some load modules have the need to use positive voltage in addition to negative voltage, or only use positive voltage, a second voltage conversion module 3 is also provided on the circuit substrate 1 of the power supply system in the embodiment of the present invention. The second voltage conversion module 3 can convert the output voltage of the power supply into a voltage of target specification and output it. For the second voltage conversion module 3, since its "positive voltage output terminal is connected to the positive voltage input terminal of the load module, and the reference ground of the output terminal is connected to the reference ground of the load module", the positive voltage input terminal of the load module can receive the positive voltage.

[0071] The second voltage conversion module 3 may be of various types, for example, a DC-DC converter, etc., which is not limited in the embodiment of the present invention.

[0072] In addition, considering that the stability of the negative voltage is more important for the load module and is conducive to ensuring the working reliability of the load module, in order to improve the supply stability of the negative voltage, a first voltage detection module and a second voltage detection module can be set in the embodiment of the present invention. The first voltage detection module can be used to detect the first real-time voltage at the positive voltage output end of the first voltage conversion module 2, and the second voltage detection module can be used to detect the second real-time voltage at the negative voltage input end of the load module. On the one hand, an alarm can be issued when the real-time voltage (the first real-time voltage and / or the second real-time voltage) is lower than the first preset threshold value. On the other hand, an alarm can be issued when the absolute value difference between the first real-time voltage and the second real-time voltage is lower than the second preset threshold value, thereby being able to warn of the "state where the negative voltage may have problems", which is conducive to improving the reliability of the negative voltage supply.

[0073] As an optional embodiment, the first voltage conversion module 2 includes a voltage conversion unit, an energy storage module and a first filtering circuit;

[0074] The input end of the first filter circuit is used to connect to the power supply, the output end of the first filter circuit is connected to the first end of the energy storage module, the second end of the energy storage module is connected to the input end of the voltage conversion unit, the positive voltage output end of the voltage conversion unit serves as the positive voltage output end of the first voltage conversion module 2, and the reference ground of the output end of the voltage conversion unit serves as the reference ground of the output end of the first voltage conversion module 2;

[0075] A first filter circuit, used for filtering the output voltage of the power supply;

[0076] Energy storage module, used to store and release electrical energy;

[0077] The voltage conversion unit is used to convert the received voltage into a DC voltage of target specifications and output it.

[0078] Specifically, considering that there may be interference signals in the output voltage provided by the power supply, in order to improve the power supply quality of the load module, the output voltage of the power supply can be filtered by the first filtering circuit in the embodiment of the present invention, and the energy storage module in the embodiment of the present invention is arranged at the front end of the voltage conversion unit, which can play the role of energy storage and energy transfer. When the input voltage changes, the energy storage module can temporarily store the energy and release it to the output end when needed, thereby playing the role of smoothing the output voltage. The power conversion unit can convert the received voltage into a DC voltage of the target specification and output it, thereby adjusting the voltage specification.

[0079] Of course, in addition to this specific structure, the first voltage conversion module 2 may also have other structures, which is not limited in the embodiment of the present invention.

[0080] Among them, the energy storage module can be of various types, for example, it can be an inductor, which can store energy during the operation of the DC-DC converter. When the input voltage changes, the inductor can temporarily store the energy and release it to the output end when needed, thereby playing a role in smoothing the output voltage. The inductor has the characteristic of hindering the change of current, can limit the rate of change of the input current, avoid damage to the circuit components caused by sudden current changes, and make the input current smoother. The embodiments of the present invention are not limited here.

[0081] As an optional embodiment, the first voltage conversion module 2 further includes a second filtering circuit;

[0082] The common end formed by the first end of the second filter circuit and the positive voltage output end of the voltage conversion unit is used as the positive voltage output end of the first voltage conversion module 2; the common end formed by the second end of the second filter circuit and the reference ground of the output end of the voltage conversion unit is used as the reference ground of the output end of the first voltage conversion module 2;

[0083] The second filtering circuit is used to filter the output voltage of the voltage conversion unit.

[0084] Specifically, considering that the voltage processed by the voltage conversion unit may also be mixed with interference signals, in order to further improve the power supply quality, the embodiment of the present invention also includes a second filtering circuit arranged between the voltage conversion unit and the load module, and the second filtering circuit can filter the output voltage of the voltage conversion unit.

[0085] As an optional embodiment, the first filtering circuit includes:

[0086] A first adjustable capacitor, used for changing its capacitance value in a controlled manner;

[0087] The first adjustable capacitor includes:

[0088] A multi-stage capacitor and a controllable switch corresponding to each capacitor;

[0089] The capacitor and its corresponding controllable switch constitute a capacitor branch, the first end of the capacitor branch is respectively connected to the output positive electrode of the power supply and the first end of the energy storage module, the second end of the capacitor branch is respectively connected to the output negative electrode of the power supply, the reference ground of the input end of the first voltage conversion module 2 and the negative electrode of the input end of the electric energy conversion unit, and the second end of the energy storage module is connected to the positive electrode of the input end of the electric energy conversion unit;

[0090] A controllable switch, used to change its on-off state under the control of a control signal, so as to switch the connection state of the capacitor in the capacitor branch;

[0091] Multi-stage capacitors include:

[0092] The first-stage capacitor is used to filter out low-frequency interference in the output voltage of the power supply when the controllable switch in the capacitor branch is closed individually;

[0093] The second-stage capacitor is used to filter out intermediate frequency interference in the output voltage of the power supply when the controllable switch in the capacitor branch is closed individually;

[0094] The third-level capacitor is used to filter out high-frequency interference in the output voltage of the power supply when the controllable switch in the capacitor branch is closed individually;

[0095] Among them, the capacitance of the first-level capacitor is in the microfarad level, the capacitance of the second-level capacitor is in the nanofarad level, and the capacitance of the third-level capacitor is in the nanofarad level.

[0096] Specifically, considering that the interference signal in the output voltage of the power supply may include multiple types, in order to be able to adapt to the "filtering requirements of different types of interference signals", the first filtering circuit in the embodiment of the present invention may include a first adjustable capacitor, which may specifically include a three-level capacitor and a controllable switch corresponding to each level of the capacitor, and each level of the capacitor has a capacitance of different levels, namely microfarad, nanofarad and picofarad, and each level of the capacitor can be connected or disconnected from the circuit according to the on-off state of the corresponding controllable switch, thereby changing the capacitance of the first adjustable capacitor to filter out the corresponding type of interference signal. The first-level capacitor of microfarad can filter out low-frequency interference, the second-level capacitor of nanofarad can filter out medium-frequency interference, and the third-level capacitor of nanofarad can filter out high-frequency interference. The specific frequency ranges of low frequency, medium frequency and high frequency here correspond to the specific capacitance of each level of the capacitor. In actual application, it is not necessary to pay attention to the specific frequencies of low frequency, medium frequency and high frequency. The capacitance of each level of the capacitor can be selected in the circuit design stage.

[0097] Among them, the first filtering circuit in the embodiment of the present invention can flexibly and selectively filter out interference signals of different frequency bands by controlling the controllable switches corresponding to each level of capacitors, adapt to scenarios with changeable interference signals, and help improve power supply quality.

[0098] As an optional embodiment, the second filtering circuit:

[0099] A second adjustable capacitor is included, which is used to controllably change its capacitance value;

[0100] The second adjustable capacitor includes:

[0101] A multi-stage capacitor and a controllable switch corresponding to each capacitor;

[0102] The capacitor and its corresponding controllable switch form a capacitor branch, the first end of the capacitor branch is connected to the positive voltage output end of the voltage conversion unit and serves as the positive voltage output end of the first voltage conversion module 2, and the second end of the capacitor branch and the output negative electrode of the voltage conversion unit form a common end, which together serve as the reference ground of the output end of the first voltage conversion module 2;

[0103] A controllable switch, used to change its on-off state under the control of a control signal, so as to switch the connection state of the capacitor in the capacitor branch;

[0104] Multi-stage capacitors include:

[0105] The first-stage capacitor is used to filter out low-frequency interference in the output voltage of the voltage conversion unit when the controllable switch in the capacitor branch is closed individually;

[0106] The second-stage capacitor is used to filter out the intermediate frequency interference in the output voltage of the voltage conversion unit when the controllable switch in the capacitor branch is closed alone;

[0107] The third-level capacitor is used to filter out high-frequency interference in the output voltage of the voltage conversion unit when the controllable switch in the capacitor branch is closed alone;

[0108] Among them, the capacitance of the first-level capacitor is in the microfarad level, the capacitance of the second-level capacitor is in the nanofarad level, and the capacitance of the third-level capacitor is in the nanofarad level.

[0109] Specifically, in order to better illustrate the embodiments of the present invention, please refer to Figure 3 , Figure 3 A schematic diagram of the structure of a first voltage conversion module 2 provided by the present invention, Figure 3 DC in the figure is the power supply, C1 to C3 are respectively the first-stage capacitor, the second-stage capacitor and the third-stage capacitor in the first adjustable capacitor (the corresponding controllable switches are not shown in the figure), L1 is an energy storage module in the form of an inductor, C4 to C6 are the first-stage capacitor, the second-stage capacitor and the third-stage capacitor in the second adjustable capacitor (the corresponding controllable switches are not shown in the figure), U01 is the positive voltage output terminal, and G01 is the reference ground of the output terminal of the first voltage conversion module 2.

[0110] Specifically, considering that the interference signal in the output voltage of the voltage conversion unit may include multiple types, in order to be applicable to the "filtering requirements of different types of interference signals", the second filtering circuit in the embodiment of the present invention may include a second adjustable capacitor, which may specifically include a three-level capacitor and a controllable switch corresponding to each level of the capacitor, and each level of the capacitor has a capacitance of different levels, namely microfarad, nanofarad and picofarad, and each level of the capacitor can be connected or disconnected from the circuit according to the on-off state of the corresponding controllable switch, thereby changing the capacitance of the second adjustable capacitor to filter out the corresponding type of interference signal, the first-level capacitor of microfarad can filter out low-frequency interference, the second-level capacitor of nanofarad can filter out medium-frequency interference, and the third-level capacitor of nanofarad can filter out high-frequency interference. The specific frequency ranges of low frequency, medium frequency and high frequency here correspond to the specific capacitance of each level of the capacitor. In actual application, it is not necessary to pay attention to the specific frequencies of low frequency, medium frequency and high frequency, and the capacitance of each level of the capacitor can be selected in the circuit design stage.

[0111] Among them, the second filtering circuit in the embodiment of the present invention can flexibly and selectively filter out interference signals of different frequency bands by controlling the controllable switches corresponding to each level of capacitors, adapt to scenarios with changeable interference signals, and help to further improve the power supply quality.

[0112] As an optional embodiment, the load module includes a radio frequency switch.

[0113] Specifically, RF switches are widely used in communication systems (such as mobile phones and base stations), radar systems (such as weather radars and military radars), and test and measurement equipment (such as network analyzers and spectrum analyzers). Many types of RF switches require the use of negative voltages, so the load module in the embodiment of the present invention may include a RF switch.

[0114] Of course, in addition to the radio frequency switch, the load module can also be of other types, which is not limited in the embodiment of the present invention.

[0115] As an optional embodiment, the voltage conversion unit includes a DC-DC converter;

[0116] The DC-DC converter is used to convert the DC voltage provided by the power supply into a DC voltage of target specifications.

[0117] Specifically, in order to better illustrate the embodiments of the present invention, please refer to Figure 4 , Figure 4 This is a structural diagram of another first voltage conversion module 2 provided by the present invention, Figure 4 Vin is the positive voltage output terminal of the power supply, GND is the reference ground of the power supply, Cin is the first filter circuit, Cout is the second filter circuit, +Vo is the positive voltage output terminal of the first voltage conversion module 2, and 0V refers to the reference ground of the output terminal of the first voltage conversion module 2 (the corresponding voltage is 0V).

[0118] Specifically, considering that a DC-to-DC converter has the advantages of wide-range voltage conversion and high-precision voltage output in terms of voltage conversion, high efficiency and low power consumption in terms of efficiency and power consumption, adaptability to different power inputs and stable and reliable output in terms of adaptability and stability, and easy integration and design as well as multiple protection functions in terms of circuit design and protection, the voltage conversion unit in the embodiment of the present invention includes a DC-to-DC converter.

[0119] Of course, in addition to the DC-DC converter, the voltage conversion unit may also be of other types, which is not limited in the embodiment of the present invention.

[0120] As an optional embodiment, the power supply system further includes an insulation module;

[0121] The insulating module is located on the circuit substrate 1, and the insulating module is arranged between the reference ground of the first voltage conversion module 2 and the reference ground of the demand module;

[0122] Insulation module, used to block the flow of electric current.

[0123] Specifically, considering that although the reference ground of the output end of the first voltage conversion module 2 is not electrically connected to the reference ground of the load module, the two parts of the reference ground may still be weakly electrically connected, thereby causing a short circuit at the output end of the first voltage conversion module 2. Therefore, in order to further prevent the reference ground of the output end of the first voltage conversion module 2 from being electrically connected to the reference ground of the load module, the power supply system in the embodiment of the present invention also includes an insulating module arranged between the reference ground of the first voltage conversion module 2 and the reference ground of the demand module, which is used to block the flow of current, thereby further electrically connecting the two.

[0124] Among them, the insulating module can be of multiple types, for example, it can be a first insulator module and a second insulator module of the sheathing type. The first insulator module can cover the terminal corresponding to the reference ground of the output end of the first voltage conversion module 2, and the second insulator module can cover the terminal corresponding to the reference ground of the load module, thereby improving the blocking effect.

[0125] In order to solve the above technical problems, the present invention further provides an electrical device, including a load module and also including the above power supply system connected to the load module.

[0126] For an introduction to the electrical equipment provided by the embodiment of the present invention, please refer to the aforementioned embodiment of the power supply system, and the embodiment of the present invention will not be described in detail here.

[0127] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other. It should also be noted that in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the element.

[0128] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power supply system, characterized in that: It includes a circuit substrate and a first voltage conversion module; The input end of the first voltage conversion module is used to connect to a power supply, the positive voltage output end of the first voltage conversion module is connected to a reference ground of a load module, the reference ground of the output end of the first voltage conversion module is connected to a negative voltage input end of the load module, and there is no electrical connection between the reference ground of the output end of the first voltage conversion module and the reference ground of the load module; The first voltage conversion module is used to convert the output voltage of the power supply into a DC voltage of target specifications and output it; The circuit substrate is used for arranging the voltage conversion module and the load module.

2. The power supply system according to claim 1, characterized in that: The power supply system also includes a second voltage conversion module; The second voltage conversion module is arranged on the circuit substrate, the input end of the second voltage conversion module is used to connect the power supply, the positive voltage output end of the second voltage conversion module is connected to the positive voltage input end of the load module, and the reference ground of the output end of the second voltage conversion module is connected to the reference ground of the load module; The second voltage conversion module is used to convert the output voltage of the power supply into a voltage of a target specification and output it.

3. The power supply system according to claim 1, characterized in that: The first voltage conversion module includes a voltage conversion unit, an energy storage module and a first filtering circuit; The input end of the first filter circuit is used to connect to the power supply, the output end of the first filter circuit is connected to the first end of the energy storage module, the second end of the energy storage module is connected to the input end of the voltage conversion unit, the positive voltage output end of the voltage conversion unit serves as the positive voltage output end of the first voltage conversion module, and the reference ground of the output end of the voltage conversion unit serves as the reference ground of the output end of the first voltage conversion module; A first filter circuit, used for filtering the output voltage of the power supply; Energy storage module, used to store and release electrical energy; The voltage conversion unit is used to convert the received voltage into a DC voltage of target specifications and output it.

4. The power supply system according to claim 3, characterized in that: The first voltage conversion module also includes a second filtering circuit; The common end formed by the first end of the second filter circuit and the positive voltage output end of the voltage conversion unit is used as the positive voltage output end of the first voltage conversion module; the common end formed by the second end of the second filter circuit and the reference ground of the output end of the voltage conversion unit is used as the reference ground of the output end of the first voltage conversion module; The second filtering circuit is used to filter the output voltage of the voltage conversion unit.

5. The power supply system according to claim 3, characterized in that: The first filtering circuit comprises: A first adjustable capacitor, used for changing its capacitance value in a controlled manner; The first adjustable capacitor comprises: A multi-stage capacitor and a controllable switch corresponding to each of the capacitors; The capacitor and the controllable switch corresponding thereto constitute a capacitor branch, the first end of the capacitor branch is respectively connected to the output positive electrode of the power supply and the first end of the energy storage module, the second end of the capacitor branch is respectively connected to the output negative electrode of the power supply, the reference ground of the input end of the first voltage conversion module and the negative electrode of the input end of the electric energy conversion unit, and the second end of the energy storage module is connected to the positive electrode of the input end of the electric energy conversion unit; The controllable switch is used to change its on-off state under the control of the control signal so as to switch the connection state of the capacitor in the capacitor branch; The multi-stage capacitor comprises: The first-level capacitor is used to filter out low-frequency interference in the output voltage of the power supply when the controllable switch in the capacitor branch is closed individually; The second-stage capacitor is used to filter out intermediate frequency interference in the output voltage of the power supply when the controllable switch in the capacitor branch is closed alone; The third-level capacitor is used to filter out high-frequency interference in the output voltage of the power supply when the controllable switch in the capacitor branch is closed alone; The capacitance of the first-level capacitor is in the microfarad level, the capacitance of the second-level capacitor is in the nanofarad level, and the capacitance of the third-level capacitor is in the nanofarad level.

6. The power supply system according to claim 4, characterized in that: The second filtering circuit: A second adjustable capacitor is included, which is used to controllably change its capacitance value; The second adjustable capacitor comprises: A multi-stage capacitor and a controllable switch corresponding to each of the capacitors; The capacitor and the corresponding controllable switch form a capacitor branch, the first end of the capacitor branch is connected to the positive voltage output end of the voltage conversion unit and serves as the positive voltage output end of the first voltage conversion module, and the second end of the capacitor branch and the output negative electrode of the voltage conversion unit form a common end, which together serve as a reference ground for the output end of the first voltage conversion module; The controllable switch is used to change its on-off state under the control of the control signal so as to switch the connection state of the capacitor in the capacitor branch; The multi-stage capacitor comprises: The first-stage capacitor is used to filter out low-frequency interference in the output voltage of the voltage conversion unit when the controllable switch in the capacitor branch is closed alone; The second-stage capacitor is used to filter out intermediate frequency interference in the output voltage of the voltage conversion unit when the controllable switch in the capacitor branch is closed alone; The third-level capacitor is used to filter out high-frequency interference in the output voltage of the voltage conversion unit when the controllable switch in the capacitor branch is closed alone; The capacitance of the first-level capacitor is in the microfarad level, the capacitance of the second-level capacitor is in the nanofarad level, and the capacitance of the third-level capacitor is in the nanofarad level.

7. The power supply system according to claim 1, characterized in that: The load module includes a radio frequency switch.

8. The power supply system according to claim 2, characterized in that: The voltage conversion unit includes a DC-DC converter; The DC-DC converter is used to convert a DC voltage provided by a power supply into a DC voltage of a target specification.

9. The power supply system according to any one of claims 1 to 8, characterized in that: The power supply system also includes an insulation module; The insulating module is located on the circuit substrate, and the insulating module is arranged between the reference ground of the first voltage conversion module and the reference ground of the demand module; The insulating module is used to block the flow of current.

10. An electrical device, characterized in that: It comprises a load module and also comprises a power supply system according to any one of claims 1 to 9 connected to the load module.

Images