Satellite-borne power supply with main / standby switching and power distribution gating functions

Abstract

The embodiment of the invention provides a satellite-borne power supply with main and standby switching and power distribution gating functions. The satellite-borne power supply comprises a power conversion circuit main part, a power conversion circuit backup part, a subordinate gating circuit and a remote control instruction circuit, the power conversion circuit main part and the power conversion circuit backup part are used for converting the primary power supply signal into a secondary power supply signal; the subordinate gating circuit is used for supplying power to the first functional module or the second functional module by the main part of the power conversion circuit and supplying power to the first functional module or the second functional module by the backup of the power conversion circuit; and the remote control instruction circuit is used for receiving a ground instruction and performing on-off control on the power conversion circuit main part, the power conversion circuit backup part and the lower-stage gating circuit according to the ground instruction. The space environment detector can realize remote switching of a power supply path and switching of a main path and a standby path, and improves the reliability, the service life and the space environment adaptability of the space environment detector.

Description

Technical Field

[0001] The embodiments of this specification relate to the field of aerospace technology, and in particular to a satellite-borne power supply with main-standby switching and power distribution gating functions. Background Art

[0002] There are a large number of high-energy charged particles captured by the geomagnetic field in the near-Earth space region. Radiation damage from high-energy charged particles to spacecraft is one of the main factors affecting the reliability and life of spacecraft. With the continuous improvement of the integration of semiconductor components on spacecraft, the characteristic size of the device is getting smaller and smaller, and the single-particle effect caused by cosmic particle radiation is becoming more and more serious, seriously affecting the reliability and life of spacecraft instruments and equipment.

[0003] In the prior art, the onboard power module usually adopts a single-channel design, so it does not have the main and standby switching function of the channel; similarly, the existing design does not have the power distribution gating function for the lower-level functional modules. Therefore, a better solution is urgently needed. Summary of the invention

[0004] In view of this, the embodiments of this specification provide a satellite-borne power supply with master-standby switching and power distribution gating functions to solve the technical defects existing in the prior art.

[0005] According to a first aspect of an embodiment of this specification, there is provided a satellite-borne power supply with a main-standby switching and power distribution gating function, characterized in that it comprises a main power conversion circuit, a backup power conversion circuit, a lower-level gating circuit and a remote control command circuit; The input terminal of the main part of the power conversion circuit is suitable for being electrically connected to an external power source; The output terminal of the main part of the power conversion circuit is electrically connected to the first input terminal of the lower level gating circuit; The input terminal of the power conversion circuit backup is suitable for being electrically connected to an external power source; The backup output terminal of the power conversion circuit is electrically connected to the second input terminal of the lower level gating circuit; The first output terminal of the lower level gating circuit is suitable for being electrically connected to the first functional module or the second functional module; The second output terminal of the lower level gating circuit is suitable for being electrically connected to the first functional module or the second functional module; The primary power supply main output terminal of the remote control command circuit is electrically connected to the control terminal of the main power supply conversion circuit; The primary power backup output terminal of the remote control command circuit is electrically connected to the control terminal of the power conversion circuit backup; The main output terminal of the secondary power supply of the remote control command circuit is electrically connected to the first control terminal of the lower level gating circuit; The main output terminal of the secondary power supply of the remote control command circuit is electrically connected to the second control terminal of the lower level gating circuit; A main power conversion circuit and a backup power conversion circuit for converting a primary power signal into a secondary power signal; A lower level gating circuit, used for supplying power to the first functional module or the second functional module by the main power conversion circuit, and supplying power to the first functional module or the second functional module by the backup power conversion circuit; The remote control command circuit is used to receive ground commands and control the on / off of the main power conversion circuit, the backup power conversion circuit and the lower-level gating circuit according to the ground commands.

[0006] In one possible implementation, the main power conversion circuit includes a main overcurrent protection circuit, a main relay switch circuit, a main surge suppression circuit, a main filter circuit, a main secondary power conversion circuit and a main backflow prevention circuit.

[0007] In a possible implementation, there are three main and secondary power conversion circuits; Three main and secondary power conversion circuits are connected in parallel; There are three main anti-backflow circuits; The three main anti-backflow circuits are connected in parallel.

[0008] In a possible implementation, the main relay switch circuit controls the on-off of the main power conversion circuit according to ground instructions.

[0009] In a possible implementation, the power conversion circuit backup includes a backup overcurrent protection circuit, a backup relay switch circuit, a backup surge suppression circuit, a backup filter circuit, a backup secondary power conversion circuit, and a backup backflow prevention circuit.

[0010] In a possible implementation, there are three backup secondary power conversion circuits; Three backup secondary power conversion circuits are connected in parallel; There are three backup anti-backflow circuits; Three backup anti-backflow circuits are connected in parallel.

[0011] In a possible implementation, the backup relay switch circuit controls the on / off of the power conversion circuit backup according to ground instructions.

[0012] In a possible implementation, the lower level gating circuit includes a main lower level gating circuit and a backup lower level gating circuit; A main part lower level gating circuit is used for supplying power to the main part of the power conversion circuit and the first functional module or the second functional module; The backup lower-level gating circuit is used for power supply backup of the power conversion circuit and the first functional module or the second functional module.

[0013] In a possible implementation, the master-part lower-level gating circuit includes at least three relays; The backup lower-stage gating circuit includes at least three relays.

[0014] In a possible implementation, the filtering circuit is an EMI filter.

[0015] The embodiment of this specification provides a satellite-borne power supply with main-standby switching and power distribution gating functions, including a main power conversion circuit, a backup power conversion circuit, a lower-level gating circuit and a remote control command circuit; the main power conversion circuit and the backup power conversion circuit are used to convert the primary power signal into a secondary power signal; the lower-level gating circuit is used for the main power conversion circuit to supply power to the first functional module or the second functional module, and the backup power conversion circuit to supply power to the first functional module or the second functional module; the remote control command circuit is used to receive ground commands and control the main power conversion circuit, the backup power conversion circuit and the lower-level gating circuit to turn on and off according to the ground commands. It can realize the remote control switch and main-standby path switching of its own power supply path, and improve the reliability, life and space environment adaptability of the space environment detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a circuit diagram of a satellite-borne power supply with main-standby switching and power distribution gating functions provided in one embodiment of this specification. DETAILED DESCRIPTION

[0017] Many specific details are described in the following description to facilitate a full understanding of this specification. However, this specification can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of this specification, so this specification is not limited to the specific implementation disclosed below.

[0018] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0019] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0020] In this specification, a satellite-borne power supply with main-standby switching and power distribution gating functions is provided, which is described in detail in the following embodiments.

[0021] See also Figure 1 , Figure 1 A circuit diagram of a satellite-borne power supply with main-standby switching and power distribution gating functions provided according to an embodiment of the present specification is shown, which specifically includes the following circuits.

[0022] The input end of the main power conversion circuit 110 is suitable for being electrically connected to an external power supply; the output end of the main power conversion circuit 110 is electrically connected to the first input end of the lower level gating circuit 130; the input end of the backup power conversion circuit 120 is suitable for being electrically connected to an external power supply; the output end of the backup power conversion circuit 120 is electrically connected to the second input end of the lower level gating circuit 130; the first output end of the lower level gating circuit 130 is suitable for being electrically connected to the first functional module or the second functional module; the second output end of the lower level gating circuit 130 is suitable for being electrically connected to the first functional module or the second functional module; the output end of the primary power main of the remote control command circuit is electrically connected to the control end of the main power conversion circuit 110; the output end of the primary power backup of the remote control command circuit is electrically connected to the backup power conversion circuit 120 0; the secondary power main output end of the remote control command circuit is electrically connected to the first control end of the lower-level gating circuit 130; the secondary power main output end of the remote control command circuit is electrically connected to the second control end of the lower-level gating circuit 130; the power conversion circuit main 110 and the power conversion circuit backup 120 are used to convert the primary power signal into a secondary power signal; the lower-level gating circuit 130 is used for the power conversion circuit main 110 to supply power to the first functional module or the second functional module, and the power conversion circuit backup 120 to supply power to the first functional module or the second functional module; the remote control command circuit is used to receive ground commands and control the on-off of the power conversion circuit main 110, the power conversion circuit backup 120 and the lower-level gating circuit 130 according to the ground commands.

[0023] In practical applications, the main power conversion circuit 110 and the backup power conversion circuit 120 are designed in the same way, and their main function is to convert the power signal of the primary power bus into multiple secondary power signals for use by the lower-level functional modules. The specific circuit working principle is: receiving the power signal of the primary power bus, connecting with the main power module and the backup power module respectively, and controlling the corresponding relay switches by two independent program control instructions to realize the power on and off of the main power module / backup, that is: the remote control instruction of the primary power main controls the power on and off of the main power module, and the remote control instruction of the primary power backup controls the power on and off of the backup power module. Therefore, the main power module and the backup power module can be powered on and work separately, or they can be powered on and work at the same time.

[0024] The lower level gating circuit 130 is used to realize the power distribution gating between the main / backup power module and the lower level functional module A / B, and is mainly composed of relays. The switching of the relays is controlled by remote control commands to realize the gating of the lower level functional module. The remote control command of the main secondary power supply and the remote control command of the backup secondary power supply are independent remote control command pairs. Among them, the relays connected to the secondary power supply signal output by the main power supply of the power module are all controlled by the main secondary power supply remote control command (switch command pair), and the relays connected to the secondary power supply signal output by the backup power supply module are all controlled by the backup secondary power supply remote control command (switch command pair). Therefore, the patent of the present invention can be adapted to the main and backup designs of the lower level, and can also supply power for two lower level functional modules with different functional purposes.

[0025] Furthermore, the main / backup telemetry signal is used to determine the on-orbit working status of the power module on the ground through the telemetry signal. Among them, the main / backup telemetry signal includes the primary power main remote control command, the primary power backup remote control command, the secondary power main remote control command and the secondary power backup remote control command, as described below.

[0026] Primary power supply master remote control command: This command is a remote control command pair, which controls the opening and closing of the main relay of the power module. One end of the main relay of the power module is connected to the primary power bus, and the other end is connected to the main part of the power module. The remote control command of the primary power main part - the opening command, makes the main relay of the power module connected, the primary power bus is connected to the main part of the power module, and the main part of the power module is in the working state to output the secondary power signal; the remote control command of the primary power main part - the closing command, makes the main relay of the power module disconnected, the primary power bus is disconnected from the main part of the power module, and the main part of the power module is in the non-working state.

[0027] Primary power backup remote control command: This command is a remote control command pair, which controls the opening and closing of the power module backup relay. One end of the power module backup relay is connected to the primary power bus, and the other end is connected to the power module backup. The primary power backup remote control command-on command turns on the power module backup relay, the primary power bus is connected to the power module backup, and the power module backup is in the working state to output the secondary power signal; the primary power backup remote control command-off command turns off the power module backup relay, the primary power bus is disconnected from the power module backup, and the power module backup is in the non-working state.

[0028] Secondary power supply main remote control command: This command is a remote control command pair, which uses a relay to control the selection of the secondary power supply main part and the lower-level functional module. One end of the relay is connected to the secondary power supply output by the main part of the power module, and the other end is connected to functional module A and functional module B respectively. The secondary power supply main part remote control command-on command connects the secondary power supply signal output by the main part of the power module with functional module A, and functional module A is powered on; the secondary power supply main part remote control command-off command connects the secondary power supply signal output by the main part of the power module with functional module B, and functional module B is powered on.

[0029] Secondary power backup remote control command: This command is a remote control command pair, which uses a relay to control the selection of the secondary power backup and the lower-level functional module. One end of the relay is connected to the secondary power output of the power module backup, and the other end is connected to functional module A and functional module B respectively. The secondary power backup remote control command-on command connects the secondary power signal output by the power module backup to functional module B, and functional module B is powered on; the secondary power backup remote control command-off command connects the secondary power signal output by the power module backup to functional module A, and functional module A is powered on.

[0030] It should be noted that both the power module and the functional module can be expanded to multiple channels.

[0031] In a possible implementation, the main power conversion circuit 110 includes a main overcurrent protection circuit, a main relay switch circuit, a main surge suppression circuit, a main filter circuit, a main secondary power conversion circuit, and a main backflow prevention circuit. There are three main secondary power conversion circuits; the three main secondary power conversion circuits are connected in parallel; there are three main backflow prevention circuits; the three main backflow prevention circuits are connected in parallel. The main relay switch circuit controls the on-off of the main power conversion circuit 110 according to ground instructions.

[0032] In practical applications, the main power conversion circuit 110 includes an overcurrent protection circuit, a relay switch circuit, a surge suppression circuit, an EMI filter circuit, a secondary power conversion circuit and an anti-backflow circuit.

[0033] Among them, the overcurrent protection circuit is used to effectively prevent the circuit overload from damaging its own circuit and the primary power bus; the relay switch circuit is used to realize the on-off switching of the main / backup source module; the surge suppression circuit is used to suppress the power-on surge and improve the internal and external instantaneous interference suppression performance of the product equipment power supply interface; the EMI filter is mainly used to filter out the noise and ripple on the bus, and control the reflected noise of the system to prevent interference with the bus; the secondary power conversion circuit is used to convert the primary bus power signal into multiple secondary power signals for use by the lower-level functional modules; the anti-backflow circuit is used to prevent the current of a power module from backflowing to another non-working power module, causing device damage.

[0034] In a possible implementation, the power conversion circuit backup 120 includes a backup overcurrent protection circuit, a backup relay switch circuit, a backup surge suppression circuit, a backup filter circuit, a backup secondary power conversion circuit, and a backup backflow prevention circuit. There are three backup secondary power conversion circuits; the three backup secondary power conversion circuits are connected in parallel; there are three backup backflow prevention circuits; the three backup backflow prevention circuits are connected in parallel. The backup relay switch circuit controls the power conversion circuit backup 120 on and off according to ground instructions.

[0035] In practical applications, the power conversion circuit backup 120 also includes an overcurrent protection circuit, a relay switch circuit, a surge suppression circuit, an EMI filter circuit, a secondary power conversion circuit, and an anti-backflow circuit. Two independent program control instructions are used to control the corresponding relay switches to realize the power on and off of the power conversion circuit main part 110 / backup, that is: the primary power main part remote control instruction controls the power on and off of the power conversion circuit main part 110, and the primary power backup remote control instruction controls the power on and off of the power conversion circuit backup 120.

[0036] In a possible implementation, the lower level gating circuit 130 includes a main lower level gating circuit 130 and a backup lower level gating circuit 130; the main lower level gating circuit 130 is used to supply power to the main power conversion circuit 110 and the first functional module or the second functional module; the backup lower level gating circuit 130 is used to supply power to the backup power conversion circuit 120 and the first functional module or the second functional module. The main lower level gating circuit 130 includes at least three relays; the backup lower level gating circuit 130 includes at least three relays.

[0037] In practical applications, the lower-level gating circuit 130 uses a remote control command pair to control the switch of the relay to realize the power distribution gating between the main power conversion circuit 110 / backup and the lower-level functional module A / B, which is realized by the relay. Among them, the relays connected to the secondary power supply signal output by the main power conversion circuit 110 are all controlled by the secondary power supply main remote control command pair, and the relays connected to the secondary power supply signal output by the backup power conversion circuit 120 are all controlled by the secondary power supply backup remote control command pair.

[0038] In one embodiment, see Figure 1 When the power supply system is connected to the lower-level functional modules A and B, the primary power supply master remote control command, the primary power supply backup remote control command, the secondary power supply master remote control command and the secondary power supply backup remote control command all send off commands, disconnect all the relays in the equipment, and turn off the main power conversion circuit 110 and the backup power conversion circuit 120, so that the system is in the starting state. At this time, through different command control, the system has 6 gating modes, namely: When the primary power master remote control command sends an on command and the secondary power master remote control command sends an on command, only the power conversion circuit master 110 is in the working state, and its output secondary power signal is connected to the function module A; When the primary power master remote control command sends an on command, only the power conversion circuit master 110 is in the working state, and its output secondary power signal is connected to the functional module B; When the primary power backup remote control command sends an on command and the secondary power backup remote control command sends an on command, only the power conversion circuit backup 120 is in the working state, and its output secondary power signal is connected to the functional module B; When the primary power backup remote control command sends an on command, only the power conversion circuit backup 120 is in working state, and its output secondary power signal is connected to the functional module A; When the primary power supply master remote control command sends an on command, the primary power supply backup remote control command sends an on command, the secondary power supply master remote control command sends an on command, and the secondary power supply backup remote control command sends an on command, the power conversion circuit master 110 is in a working state, and its output secondary power signal is connected to the functional module A, and at the same time, the power conversion circuit backup 120 is in a working state, and its output secondary power signal is connected to the functional module B; When the primary power main remote control command sends an on command and the primary power backup remote control command sends an on command, the power conversion circuit main 110 is in working state, and its output secondary power signal is connected to the functional module B. At the same time, the power conversion circuit backup 120 is in working state, and its output secondary power signal is connected to the functional module A.

[0039] In another embodiment, see Figure 1When the power supply system is connected to the lower functional modules A and B, the primary power supply master remote control command sends an on command, the primary power supply backup remote control command sends an off command, the secondary power supply master remote control command sends an on command, and the secondary power supply backup remote control command sends an on command. In the system, only the power conversion circuit master 110 is in working state, and its output secondary power supply signal is connected to the functional module A.

[0040] When the main telemetry signal detects an abnormality, the primary power main remote control command sends a shutdown command and the primary power backup remote control command sends an opening command. The system switches to only the power conversion circuit backup 120 in working state, and its output secondary power signal is connected to functional module B.

[0041] When the main telemetry signal detects an abnormality, the primary power main remote control command sends an off command, the primary power backup remote control command sends an on command, and the secondary power backup remote control command sends an off command. The system switches to only the power conversion circuit backup 120 in working state, and its output secondary power signal is connected to functional module A.

[0042] When the secondary power master remote control command sends an off command, the power conversion circuit master 110 outputs a secondary power signal to switch to connect with the functional module B.

[0043] In summary, the onboard power module proposed in the embodiments of this specification has the functions of remote control switch and master-slave switching of its own module. High-energy charged particles can easily cause radiation damage to spacecraft instruments. When a fault in the power conversion circuit is detected, the master / backup switching of the power conversion circuit can be performed. Through switching, the reliability and life of the system are increased to twice that of a single power conversion circuit. Therefore, the onboard power module of the present invention has the advantages of free switching between master and backup, high reliability, high life, and high adaptability to space environment.

[0044] In addition, the surge suppression circuit in the power conversion circuit can suppress the power-on surge and improve the internal and external transient interference suppression performance of the product equipment power supply interface. The EMI filter can filter out the noise and ripple on the bus and control the reflected noise of this system to prevent interference with the bus; it has the advantages of short-circuit protection, surge suppression, low ripple, and backflow prevention.

[0045] Furthermore, it also has the function of power distribution gating for the lower-level functional modules, which can adapt to the lower-level main and backup designs, and can also supply power to the lower-level functional modules with two different functional purposes. It has the advantages of strong adaptability and driving ability.

[0046] The embodiment of the present specification provides a satellite-borne power supply with main-standby switching and power distribution gating functions, including a main power conversion circuit 110, a backup power conversion circuit 120, a lower-level gating circuit 130 and a remote control command circuit; the main power conversion circuit 110 and the backup power conversion circuit 120 are used to convert a primary power signal into a secondary power signal; the lower-level gating circuit 130 is used for the main power conversion circuit 110 to supply power to a first functional module or a second functional module, and the backup power conversion circuit 120 to supply power to a first functional module or a second functional module; the remote control command circuit is used to receive ground commands and control the main power conversion circuit 110, the backup power conversion circuit 120 and the lower-level gating circuit 130 on and off according to the ground commands. It can realize the remote control switch of its own power supply path and the switching of the main and backup paths, thereby improving the reliability, life and space environment adaptability of the space environment detector.

[0047] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of this specification are not limited by the order of the actions described, because according to the embodiments of this specification, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the embodiments of this specification.

[0048] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0049] The preferred embodiments of this specification disclosed above are only used to help explain this specification. The optional embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the embodiments of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the embodiments of this specification, so that technicians in the relevant technical field can well understand and use this specification. This specification is only limited by the claims and their full scope and equivalents.

Claims

1. A satellite-borne power supply with main-standby switching and power distribution gating functions, characterized in that: It includes a main power conversion circuit, a backup power conversion circuit, a lower level gating circuit and a remote control command circuit; The input end of the main part of the power conversion circuit is suitable for being electrically connected to an external power source; The output terminal of the main part of the power conversion circuit is electrically connected to the first input terminal of the lower-level gating circuit; The backup input terminal of the power conversion circuit is suitable for being electrically connected to an external power source; The backup output terminal of the power conversion circuit is electrically connected to the second input terminal of the lower-level gating circuit; The first output terminal of the lower level gating circuit is suitable for being electrically connected to the first functional module or the second functional module; The second output terminal of the lower level gating circuit is suitable for being electrically connected to the first functional module or the second functional module; The primary power supply main output terminal of the remote control command circuit is electrically connected to the control terminal of the primary power supply conversion circuit; The primary power backup output terminal of the remote control command circuit is electrically connected to the control terminal of the power conversion circuit backup; The main output terminal of the secondary power supply of the remote control command circuit is electrically connected to the first control terminal of the lower level gating circuit; The secondary power main output terminal of the remote control command circuit is electrically connected to the second control terminal of the lower level gating circuit; The main power conversion circuit and the backup power conversion circuit are used to convert the primary power signal into a secondary power signal; The lower level gating circuit is used for the power supply of the power conversion circuit to the first functional module or the second functional module, and the power supply of the power conversion circuit to the first functional module or the second functional module; The remote control command circuit is used to receive ground commands and perform on-off control on the main power conversion circuit, the backup power conversion circuit and the lower-level gating circuit according to the ground commands.

2. The satellite-borne power supply with main-standby switching and power distribution gating functions according to claim 1 is characterized in that: The main power conversion circuit includes a main overcurrent protection circuit, a main relay switch circuit, a main surge suppression circuit, a main filter circuit, a main secondary power conversion circuit and a main backflow prevention circuit.

3. The satellite-borne power supply with main-standby switching and power distribution gating functions according to claim 2 is characterized in that: There are three main and secondary power conversion circuits; The three main and secondary power conversion circuits are connected in parallel; There are three main anti-backflow circuits; The three main anti-backflow circuits are connected in parallel.

4. The satellite-borne power supply with main-standby switching and power distribution gating functions according to claim 2 is characterized in that: The main relay switch circuit controls the on-off of the main power conversion circuit according to the ground instruction.

5. The satellite-borne power supply with main-standby switching and power distribution gating functions according to claim 1 is characterized in that: The power conversion circuit backup includes a backup overcurrent protection circuit, a backup relay switch circuit, a backup surge suppression circuit, a backup filter circuit, a backup secondary power conversion circuit and a backup backflow prevention circuit.

6. The satellite-borne power supply with main-standby switching and power distribution gating functions according to claim 5 is characterized in that: There are three backup secondary power conversion circuits; The three backup secondary power conversion circuits are connected in parallel; There are three backup anti-backflow circuits; The three backup anti-backflow circuits are connected in parallel.

7. The satellite-borne power supply with main-standby switching and power distribution gating functions according to claim 5 is characterized in that: The backup relay switch circuit performs on-off control on the backup of the power conversion circuit according to the ground instruction.

8. The satellite-borne power supply with main-standby switching and power distribution gating functions according to claim 1 is characterized in that: The lower level gating circuit comprises a main lower level gating circuit and a backup lower level gating circuit; The main part lower level gating circuit is used for supplying power to the main part of the power conversion circuit and the first functional module or the second functional module; The backup lower-level gating circuit is used for power supply backup of the power conversion circuit and the first functional module or the second functional module.

9. The satellite-borne power supply with main-standby switching and power distribution gating functions according to claim 8, characterized in that: The main subordinate gating circuit includes at least three relays; The backup lower-level gating circuit includes at least three relays.

10. The satellite-borne power supply with main-standby switching and power distribution gating functions according to claim 2 or 5, characterized in that: The filtering circuit is an EMI filter.

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