Satellite solar cell array power supply control circuit and control method

Abstract

The invention discloses a satellite solar cell array power supply control circuit and a control method. The control circuit comprises a forced shunting module and a switch module; the forced shunting module comprises a forced shunting transistor, the switch module is connected with the storage battery, the switch module controls the forced shunting transistor to be conducted in a first preset stage, and the forced shunting transistor forcibly shunts electric energy generated by the solar cell array in the first preset stage, so that the voltage transmitted to the bus by the solar cell array is zero; according to the control circuit provided by the invention, the electric energy generated by the solar cell array can be forcibly shunted in the first preset stage of satellite operation, so that abnormal power-on of the satellite in the first preset stage is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply control, and in particular to a satellite solar cell array power supply control circuit and control method. Background Art

[0002] As the energy equipment of satellites, solar arrays are one of the key components of satellites and are known as the "lifeline" of satellites. With precise solar orientation technology, they can adjust their angles in real time to ensure maximum absorption of sunlight and convert sunlight into electrical energy to provide sufficient energy for satellites.

[0003] At present, the solar array power supply control circuit generally controls the power supply of the solar array after the solar array is powered normally. When loading the rocket, the solar array is folded and installed, and is controlled to unfold after the starship is separated. After the satellite jettisons the shroud and before the starship separates, the solar array is less exposed to light, and the angle of light is random, and the power generation efficiency is random. At this time, abnormal power generation of the solar array may cause abnormal startup and power-on of a single unit in the satellite, abnormal satellite computer software, and serious consequences may even cause the satellite to unfold before it is separated from the rocket, thereby causing damage to the solar array and mission failure. However, the solar array power supply control circuit in the prior art all performs power supply control after the solar array is powered normally. In this stage after the satellite jettisons the shroud and before the starship separates, the problem of abnormal power generation of the solar array causing abnormal power-on of the satellite may occur. Summary of the invention

[0004] The present invention provides a satellite solar array power supply control circuit and control method to solve the problem in the prior art that abnormal power-on of the satellite is caused by abnormal power generation of the solar array during the period between the satellite jettisoning its shield and the starship separating.

[0005] According to one aspect of the present invention, there is provided a satellite solar array power supply control circuit, comprising a forced current shunting module and a switch module;

[0006] The forced shunt module includes a forced shunt transistor, the control end of the forced shunt transistor is connected to a switch module, the switch module is connected to a battery, and the switch module is used to connect the battery and the control end of the forced shunt transistor in a first preset stage to turn on the forced shunt transistor;

[0007] The first end of the forced shunt transistor is connected to the solar cell array, the second end of the forced shunt transistor is grounded, and the forced shunt transistor is used to force shunt the electric energy generated by the solar cell array in the first preset stage so that the voltage transmitted from the solar cell array to the bus is zero.

[0008] Optionally, the satellite solar array power supply control circuit also includes a control module, and the forced shunt module also includes a relay switch unit, a voltage divider unit, a voltage stabilizing unit and an isolation protection unit, the voltage divider unit connects the switch module, the relay switch unit, the voltage stabilizing unit and the isolation protection unit, the relay switch unit connects the isolation protection unit and the control module, and the isolation protection unit is connected to the control end of the forced shunt transistor; the relay switch unit is used to be turned on in the first preset stage, the voltage divider unit is used to divide the voltage output by the battery, and the voltage stabilizing unit is used to stabilize the voltage output by the voltage divider unit The isolation protection unit is used to clamp the control terminal voltage of the forced shunt transistor after the connection between the battery and the control terminal of the forced shunt transistor is disconnected; the control module connects the bus and the forced shunt module, and the switch module is also used to connect the battery and the bus in a second preset stage to power the control module of the bus and disconnect the connection between the battery and the control terminal of the forced shunt transistor. The control module is used to detect the control terminal voltage of the forced shunt transistor in the second preset stage, and control the relay switch unit to turn off when the control terminal voltage of the forced shunt transistor is greater than a first preset value.

[0009] Optionally, the relay switch unit includes a first relay switch and a second relay switch, the first end of the first relay switch is connected to the first end of the voltage divider unit, the second end of the first relay switch is connected to the second end of the voltage divider unit, the first end of the second relay switch is connected to the first end of the isolation protection unit, the second end of the second relay switch is connected to the second end of the isolation protection unit, the third end of the voltage divider unit, and the first end of the voltage stabilizing unit, and the control end of the first relay switch and the control end of the second relay switch are connected to the control module.

[0010] Optionally, the voltage divider unit includes a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor, the first end of the first resistor is connected to the first end of the second resistor and the switch module, the second end of the first resistor is connected to the second end of the second resistor and the first end of the voltage divider unit, the first end of the third resistor is connected to the first end of the fourth resistor and the second end of the voltage divider unit, the first end of the fifth resistor is connected to the second end of the third resistor, the second end of the fourth resistor and the third end of the voltage divider unit, and the second end of the fifth resistor is grounded.

[0011] Optionally, the voltage stabilizing unit includes a first voltage stabilizing tube, a first end of the first voltage stabilizing tube is connected to a first end of the voltage stabilizing unit, and a second end of the first voltage stabilizing tube is grounded.

[0012] Optionally, the isolation protection unit includes a first diode and a second diode, the first end of the first diode is connected to the first end of the isolation protection unit, the second end of the first diode is connected to the control end of the forced shunt transistor, the first end of the second diode is connected to the second end of the isolation protection unit, and the second end of the second diode is connected to the switch module.

[0013] Optionally, the switch module includes a first switch unit and a second switch unit, the first switch unit connecting the battery and the forced shunt module, the second switch unit connecting the battery and the busbar, the first switch unit being used to connect the battery and the forced shunt module in a first preset stage, and disconnect the battery and the forced shunt module in a second preset stage, the second switch unit being used to connect the battery and the busbar in the second preset stage, and disconnect the battery and the busbar in the first preset stage.

[0014] Optionally, the first switch unit includes a first travel switch and a second travel switch, the first end of the first travel switch is connected to the battery, the second end of the first travel switch is connected to the first end of the second travel switch, and the second end of the second travel switch is connected to the forced shunt module.

[0015] Optionally, the second switch unit includes a third travel switch, a fourth travel switch and a first transistor, the first end of the third travel switch is connected to the first end of the fourth travel switch and the control end of the first transistor, the second end of the third travel switch and the second end of the fourth travel switch are grounded, the first end of the first transistor is connected to the bus, and the second end of the first transistor is connected to the battery.

[0016] According to another aspect of the present invention, a power supply control method is provided, which is executed by the satellite solar array power supply control circuit, and the control method includes:

[0017] The switch module connects the battery and the control end of the forced shunt transistor in a first preset stage to turn on the forced shunt transistor;

[0018] The forced shunt transistor forcedly shunts the electric energy generated by the solar cell array, so that the voltage transmitted from the solar cell array to the bus is zero.

[0019] The technical solution of the embodiment of the present invention provides a satellite solar array power supply control circuit, including a forced shunt module and a switch module. The forced shunt module includes a forced shunt transistor. The switch module is connected to a battery. The switch module controls the forced shunt transistor to be turned on in a first preset stage. The forced shunt transistor forcibly shunts the electric energy generated by the solar array in the first preset stage. The first preset stage is the period after the satellite jettisons the shield and before the starship separates. The electric energy generated by the solar array is forcibly shunted by the forced shunt transistor to ensure that the voltage transmitted to the bus by the solar array in this stage is zero, effectively avoiding the problem of abnormal power-on of the satellite caused by abnormal power generation of the solar array in this stage.

[0020] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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.

[0022] Figure 1 is a structural diagram of a satellite solar array control circuit provided by an embodiment of the present invention;

[0023] Figure 2 It is a circuit diagram of a satellite solar array power supply control circuit provided by an embodiment of the present invention;

[0024] Figure 3 A flow chart of a power supply control method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme 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 only 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 should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] The embodiment of the present invention provides a satellite solar array power supply control circuit. Figure 1 FIG. 1 is a structural diagram of a satellite solar array control circuit provided by an embodiment of the present invention. Figure 1 As shown, the control circuit includes a forced shunt module 110 and a switch module 120; the forced shunt module 110 includes a forced shunt transistor Q1, the control end of the forced shunt transistor Q1 is connected to the switch module 120, the switch module 120 is connected to the battery, and the switch module 120 is used to connect the battery and the control end of the forced shunt transistor Q1 in the first preset stage to turn on the forced shunt transistor Q1; the first end of the forced shunt transistor Q1 is connected to the solar cell array, the second end of the forced shunt transistor Q1 is grounded, and the forced shunt transistor Q1 is used to force shunt the electric energy generated by the solar cell array in the first preset stage to make the voltage transmitted to the bus by the solar cell array zero.

[0028] In the embodiment of the present invention, the forced shunt module 110 is a module for forced shunt of the electric energy generated by the solar array in the first preset stage, wherein the forced shunt transistor Q1 remains in the on state in the first preset stage, and forced shunt of the electric energy generated by the solar array, and the solar array is the sailboard exposed to light in the first preset stage. The switch module 120 is a module that is turned on or off according to the operation stage of the satellite, and is used to connect the battery and the forced shunt transistor Q1, and connect the battery and the bus, for example, the switch module 120 includes a travel switch.

[0029] In the embodiment of the present invention, in the first preset stage (i.e., after the satellite jettisons the shroud and before the starship separates), the switch module 120 connects the positive electrode (+) of the battery and the control end of the forced shunt transistor Q1, the first end of the forced shunt transistor Q1 is connected to the solar cell array, the second end of the forced shunt transistor Q1 is connected to the negative electrode (-) of the battery, the forced shunt transistor Q1 remains in the on state, and after the outer sail panels in the solar cell array generate electrical energy under the illumination of light, the forced shunt transistor Q1 forcibly shunts the electrical energy generated by the solar cell array, so that the voltage transmitted to the bus by the solar cell array is zero, wherein the bus is connected to the electrical load, thereby avoiding abnormal power-on of the electrical load.

[0030] The technical solution of the embodiment of the present invention provides a satellite solar array power supply control circuit, including a forced shunt module and a switch module. The forced shunt module includes a forced shunt transistor. The switch module is connected to a battery. The switch module controls the forced shunt transistor to be turned on in a first preset stage. The forced shunt transistor forcibly shunts the electric energy generated by the solar array in the first preset stage. The first preset stage is the period after the satellite jettisons the shield and before the starship separates. The electric energy generated by the solar array is forcibly shunted by the forced shunt transistor to ensure that the voltage transmitted to the bus by the solar array in this stage is zero, effectively avoiding the problem of abnormal power-on of the satellite caused by abnormal power generation of the solar array in this stage.

[0031] Figure 2 is a circuit diagram of a satellite solar array power supply control circuit provided by an embodiment of the present invention, such as Figure 2As shown, the satellite solar array power supply control circuit also includes a control module 130, and the forced shunt module 110 also includes a relay switch unit 111, a voltage dividing unit 112, a voltage stabilizing unit 113 and an isolation protection unit 114. The voltage dividing unit 112 connects the switch module 120, the relay switch unit 111, the voltage stabilizing unit 113 and the isolation protection unit 114. The relay switch unit 111 connects the isolation protection unit 114 and the control module 130. The isolation protection unit 114 is connected to the control end of the forced shunt transistor Q1; the relay switch unit 111 is used to be turned on in the first preset stage, the voltage dividing unit 112 is used to divide the voltage output by the battery, the voltage stabilizing unit 113 is used to stabilize the voltage output by the voltage dividing unit 112, and the isolation protection unit 114 is used to clamp the control end voltage of the forced shunt transistor Q1 after the connection between the battery and the control end of the forced shunt transistor Q1 is disconnected. The control module 130 connects the bus and the forced shunt module 110. The switch module 120 is also used to connect the battery and the bus in the second preset stage so that the bus supplies power to the control module 130, and disconnect the battery from the control end of the forced shunt transistor Q1. The control module 130 is used to detect the control end voltage of the forced shunt transistor in the second preset stage, and control the relay switch unit 111 to shut down when the control end voltage of the forced shunt transistor Q1 is greater than the first preset value.

[0032] In the embodiment of the present invention, the relay switch unit 111 is a unit for realizing circuit switch control based on a relay, and the relay switch unit is turned on in the first preset stage. The voltage dividing unit 112 is a unit for dividing the voltage output by the battery, and providing a voltage that meets the requirements for the control end of the forced shunt transistor Q1. The voltage stabilizing unit 113 is a unit for stabilizing the voltage after the voltage division by the voltage dividing unit, and improving the stability of the voltage at the control end of the forced shunt transistor Q1. The isolation protection unit 114 is a unit for clamping the voltage at the control end of the forced shunt transistor Q1 in the second preset stage, to ensure that the forced shunt transistor Q1 is turned off, and to avoid external large current shocks that damage the device.

[0033] In the embodiment of the present invention, the control module 130 is a module for collecting, processing and issuing instructions for the satellite platform data, and has the functions of task management and scheduling, data processing, control functions, communication management, and system detection and fault diagnosis. For example, the control module 130 includes a satellite service computer. In the second preset stage (i.e., after the satellite is separated from the starship), the switch module 120 connects the battery and the bus, and the bus supplies power to the control module 130. At the same time, the switch module 120 disconnects the battery from the control end of the forced shunt transistor Q1, and the forced shunt module 110 is turned off. The control module 130 detects the control terminal voltage of the forced shunt transistor, and when the control terminal voltage of the forced shunt transistor Q1 is greater than the first preset value (the minimum voltage for the forced shunt transistor Q1 to be turned on), that is, the forced shunt transistor Q1 is still in the on state (for example, the connection between the battery and the control terminal of the forced shunt transistor Q1 is not disconnected due to a failure of the switch module 120), at this time, the control module 130 controls the relay switch unit 111 to be turned off, so that the control terminal voltage of the forced shunt transistor Q1 is zero, ensuring that the forced shunt transistor Q1 is turned off in the second preset stage, so that the solar cell array is powered normally.

[0034] Specifically, the relay switch unit 111 includes a first relay switch K1 and a second relay switch K2, the first end of the first relay switch K1 is connected to the first end of the voltage divider unit 112, the second end of the first relay switch K1 is connected to the second end of the voltage divider unit 112, the first end of the second relay switch K2 is connected to the first end of the isolation protection unit 114, the second end of the second relay switch K2 is connected to the second end of the isolation protection unit 114, the third end of the voltage divider unit 112, and the first end of the voltage stabilizing unit 113, and the control end of the first relay switch K1 and the control end of the second relay switch K2 are connected to the control module 130.

[0035] In the embodiment of the present invention, the forced shunt module 110 further includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a first capacitor C1 and a second voltage regulator T2, the second voltage regulator T2 is connected in parallel with the ninth resistor R9, and the connection node between the ninth resistor R9 and the tenth resistor R10 is connected to the control module 130. Referring to the above embodiment, in the first preset stage, the first relay switch K1 and the second relay switch K2 are closed, and the electrical signal output from the positive electrode of the battery is transmitted to the control end of the forced shunt transistor Q1 after passing through the switch module 120, the voltage dividing unit 112, the first relay switch K1, the second relay switch K2, the isolation protection unit 114 and the eleventh resistor R11, the voltage dividing unit 112 divides the voltage output by the battery, and the voltage stabilizing unit 113 stabilizes the voltage after the voltage dividing unit divides, thereby improving the stability of the voltage at the control end of the forced shunt transistor Q1 and ensuring that the forced shunt transistor Q1 is in a conducting state in the first preset stage. In the second preset stage, the control module 130 determines the working state of the forced shunt transistor Q1 by detecting the control terminal voltage of the forced shunt transistor Q1. When the forced shunt transistor Q1 is in the on state, the first relay switch K1 and the second relay switch K2 are controlled to be disconnected, so that the control terminal voltage of the forced shunt transistor Q1 is zero, ensuring that the forced shunt transistor Q1 is turned off in the second preset stage.

[0036] Continue to refer Figure 2 The voltage dividing unit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a fifth resistor R5, wherein the first end of the first resistor R1 is connected to the first end of the second resistor R2 and the switch module 120, the second end of the first resistor R1 is connected to the second end of the second resistor R2 and the first end of the voltage dividing unit, the first end of the third resistor R3 is connected to the first end of the fourth resistor R4 and the second end of the voltage dividing unit, the first end of the fifth resistor R5 is connected to the second end of the third resistor R3, the second end of the fourth resistor R4 and the third end of the voltage dividing unit, and the second end of the fifth resistor R5 is grounded. The voltage stabilizing unit includes a first voltage stabilizing tube T1, wherein the first end of the first voltage stabilizing tube T1 is connected to the first end of the voltage stabilizing unit, and the second end of the first voltage stabilizing tube T1 is grounded.

[0037] On the basis of the above embodiment, the voltage output by the battery is divided by the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4 and the fifth resistor R5, and then output through the third end of the voltage dividing unit. The first voltage regulator tube T1 is connected in parallel with the fifth resistor R5 to stabilize the voltage output by the voltage dividing unit.

[0038] Continue to refer Figure 2The switch module 120 includes a first switch unit and a second switch unit. The first switch unit connects the battery and the forced shunt module, and the second switch unit connects the battery and the bus. The first switch unit is used to connect the battery and the forced shunt module in the first preset stage, and disconnect the battery and the forced shunt module in the second preset stage. The second switch unit is used to connect the battery and the bus in the second preset stage, and disconnect the battery and the bus in the first preset stage.

[0039] In an embodiment of the present invention, the first switch unit is a unit that controls the forced shunt module 110 to be turned on or off, and the second switch unit is a unit that controls autonomous power-on. In the second preset stage, the second switch unit connects the battery and the bus, the battery supplies power to the bus, and the load connected to the bus operates normally. For example, the control module 130 is connected to the bus, and in the second preset stage, the bus supplies power to the control module 130.

[0040] Specifically, the first switch unit includes a first travel switch S1 and a second travel switch S2, wherein a first end of the first travel switch S1 is connected to a battery, a second end of the first travel switch S1 is connected to a first end of the second travel switch S2, and a second end of the second travel switch S2 is connected to the forced shunt module 110. The second switch unit includes a third travel switch S3, a fourth travel switch S4, and a first transistor Q2, wherein a first end of the third travel switch S3 is connected to a first end of the fourth travel switch S4 and a control end of the first transistor Q2, a second end of the third travel switch S3 and a second end of the fourth travel switch S4 are grounded, a first end of the first transistor Q2 is connected to a bus, and a second end of the first transistor Q2 is connected to a battery.

[0041] In the embodiment of the present invention, the second switch unit further includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a third relay switch K3 and a fourth relay switch K4, the third relay switch K3 is closed in the first preset stage, and the fourth relay switch K4 is disconnected in the first preset stage. Referring to the above embodiment, in the first preset stage, the normally closed contacts of the first travel switch S1 and the second travel switch S2 are closed, the normally open contacts are disconnected, the normally closed contacts of the third travel switch S3 and the fourth travel switch S4 are closed, the normally open contacts are disconnected, the first transistor Q2 is disconnected, and the battery supplies power to the forced shunt module 110. In the second preset stage, the first travel switch S1 and the second travel switch S2 are disconnected, the third travel switch S3 and the fourth travel switch S4 are closed, the first transistor Q2 is turned on, the battery supplies power to the bus through the first transistor Q2, the control module 130 controls the fourth relay switch K4 to be closed, and at the same time, the power supply circuit of the forced shunt module 110 is disconnected. Among them, the first travel switch S1 and the second travel switch S2 are connected in series, and the normally closed contact of one of the first travel switch S1 and the second travel switch S2 is opened, which can ensure that the power supply circuit of the forced shunt module 110 is disconnected, and the third travel switch S3 and the fourth travel switch S4 are connected in parallel, and the normally open contact of one of the third travel switch S3 and the fourth travel switch S4 is closed, which can ensure that the first transistor Q2 is turned on, thereby improving the reliability of the circuit.

[0042] Continue to refer Figure 2 The isolation protection unit includes a first diode D1 and a second diode D2, the first end of the first diode D1 is connected to the first end of the isolation protection unit, the second end of the first diode D1 is connected to the control end of the forced shunt transistor Q1, the first end of the second diode D2 is connected to the second end of the isolation protection unit, and the second end of the second diode D2 is connected to the switch module 120.

[0043] Referring to the above embodiment, in the second preset stage, the switch module 120 connects the battery and the busbar, and disconnects the battery from the control end of the forced shunt transistor Q1, and the forced shunt module 110 is turned off. The second end of the second diode D2 is connected to the first end of the third travel switch S3 and the fourth travel switch S4. Since the third travel switch S3 and the fourth travel switch S4 are turned on, the voltage of the second end of the second diode D2 is zero, and the voltage of the first end of the second diode D2 (i.e., the first end of the first diode D1) is 0.7V. Therefore, the voltage of the second end of the first diode D1 is zero, so that the voltage of the control end of the forced shunt transistor Q1 is zero, ensuring that the forced shunt transistor Q1 is turned off.

[0044] In the embodiment of the present invention, in the first preset stage, the switch module 120 connects the battery and the control end of the forced shunt transistor Q1, and the battery provides a conduction voltage for the forced shunt transistor Q1, so that the forced shunt transistor Q1 remains in the on state. After the outer panels in the solar array are illuminated by light and generate electrical energy, the forced shunt transistor Q1 forcibly shunts the electrical energy generated by the solar array, so that the voltage transmitted to the bus by the solar array is zero, thereby avoiding abnormal power-on of the electrical load. In the second preset stage, the switch module 120 connects the battery and the bus, and the bus supplies power to the control module 130. At the same time, the switch module 120 disconnects the battery from the control end of the forced shunt transistor Q1, and the forced shunt transistor Q1 is turned off. At this time, the control module 130 determines whether the forced shunt transistor Q1 is turned off by detecting the control end voltage of the forced shunt transistor Q1. If the forced shunt transistor Q1 is still in the on state, the relay switch unit 111 is controlled to be turned off, so that the control end voltage of the forced shunt transistor Q1 is zero, ensuring that the forced shunt transistor Q1 is turned off in the second preset stage, so that the solar cell array is powered normally.

[0045] The embodiment of the present invention also provides a power supply control method. Figure 3 A flow chart of a power supply control method provided by an embodiment of the present invention, such as Figure 3 As shown, the control method includes:

[0046] S10, the switch module connects the battery and the control end of the forced shunt transistor in the first preset stage to turn on the forced shunt transistor.

[0047] S20, the forced shunt transistor forcibly shunts the electric energy generated by the solar cell array, so that the voltage transmitted to the bus by the solar cell array is zero.

[0048] The power supply control method provided by the embodiment of the present invention is executed by the satellite solar array power supply control circuit in any of the above embodiments. By setting the switch module to control the forced shunt transistor to be turned on in the first preset stage, the forced shunt transistor forces the shunt of the electric energy generated by the solar array in the first preset stage. By forcing the shunt transistor to force the shunt of the electric energy generated by the solar array, it is ensured that the voltage transmitted to the bus by the solar array in this stage is zero, and the problem of abnormal power-on of the satellite caused by abnormal power generation of the solar array in this stage is effectively avoided. In addition, the switch module connects the battery and the bus in the second preset stage to power the control module, and disconnects the connection between the battery and the control end of the forced shunt transistor. When the control module detects that the forced shunt module is in normal working state, it controls the forced shunt transistor to turn off, ensuring that the forced shunt module is turned off in the second preset stage, thereby ensuring the reliability of the satellite system.

[0049] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0050] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A satellite solar array power supply control circuit, characterized in that: It includes a forced shunt module and a switch module; The forced shunt module includes a forced shunt transistor, the control end of the forced shunt transistor is connected to a switch module, the switch module is connected to a battery, and the switch module is used to connect the battery and the control end of the forced shunt transistor in a first preset stage to turn on the forced shunt transistor; The first end of the forced shunt transistor is connected to the solar cell array, the second end of the forced shunt transistor is grounded, and the forced shunt transistor is used to force shunt the electric energy generated by the solar cell array in the first preset stage so that the voltage transmitted from the solar cell array to the bus is zero.

2. The satellite solar array power supply control circuit according to claim 1, characterized in that: It also includes a control module, and the forced shunt module also includes a relay switch unit, a voltage dividing unit, a voltage stabilizing unit and an isolation protection unit, the voltage dividing unit is connected to the switch module, the relay switch unit, the voltage stabilizing unit and the isolation protection unit, the relay switch unit is connected to the isolation protection unit and the control module, and the isolation protection unit is connected to the control end of the forced shunt transistor; the relay switch unit is used to be turned on in the first preset stage, the voltage dividing unit is used to divide the voltage output by the battery, the voltage stabilizing unit is used to stabilize the voltage output by the voltage dividing unit, and the isolation protection unit is used to clamp the control end voltage of the forced shunt transistor after the connection between the battery and the control end of the forced shunt transistor is disconnected; The control module connects the bus and the forced shunt module, and the switch module is also used to connect the battery and the bus in a second preset stage so that the bus supplies power to the control module, and disconnect the battery from the control end of the forced shunt transistor. The control module is used to detect the control terminal voltage of the forced shunt transistor in the second preset stage, and control the relay switch unit to shut down when the control terminal voltage of the forced shunt transistor is greater than a first preset value.

3. The satellite solar array power supply control circuit according to claim 2, characterized in that: The relay switch unit includes a first relay switch and a second relay switch, wherein the first end of the first relay switch is connected to the first end of the voltage divider unit, the second end of the first relay switch is connected to the second end of the voltage divider unit, the first end of the second relay switch is connected to the first end of the isolation protection unit, the second end of the second relay switch is connected to the second end of the isolation protection unit, the third end of the voltage divider unit, and the first end of the voltage stabilizing unit, and the control end of the first relay switch and the control end of the second relay switch are connected to the control module.

4. The satellite solar array power supply control circuit according to claim 3, characterized in that: The voltage dividing unit includes a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor, wherein a first end of the first resistor is connected to a first end of the second resistor and the switch module, a second end of the first resistor is connected to a second end of the second resistor and a first end of the voltage dividing unit, a first end of the third resistor is connected to a first end of the fourth resistor and a second end of the voltage dividing unit, a first end of the fifth resistor is connected to a second end of the third resistor, a second end of the fourth resistor and a third end of the voltage dividing unit, and a second end of the fifth resistor is grounded.

5. The satellite solar array power supply control circuit according to claim 3, characterized in that: The voltage stabilizing unit comprises a first voltage stabilizing tube, a first end of the first voltage stabilizing tube is connected to a first end of the voltage stabilizing unit, and a second end of the first voltage stabilizing tube is grounded.

6. The satellite solar array power supply control circuit according to claim 3, characterized in that: The isolation protection unit includes a first diode and a second diode, wherein the first end of the first diode is connected to the first end of the isolation protection unit, the second end of the first diode is connected to the control end of the forced shunt transistor, the first end of the second diode is connected to the second end of the isolation protection unit, and the second end of the second diode is connected to the switch module.

7. The satellite solar array power supply control circuit according to claim 1, characterized in that: The switch module includes a first switch unit and a second switch unit, the first switch unit connects the battery and the forced shunt module, the second switch unit connects the battery and the busbar, the first switch unit is used to connect the battery and the forced shunt module in a first preset stage, and disconnect the battery and the forced shunt module in a second preset stage, the second switch unit is used to connect the battery and the busbar in the second preset stage, and disconnect the battery and the busbar in the first preset stage.

8. The satellite solar array power supply control circuit according to claim 7, characterized in that: The first switch unit includes a first travel switch and a second travel switch, wherein a first end of the first travel switch is connected to the battery, a second end of the first travel switch is connected to a first end of the second travel switch, and a second end of the second travel switch is connected to the forced shunt module.

9. The satellite solar array power supply control circuit according to claim 7, characterized in that: The second switch unit includes a third travel switch, a fourth travel switch and a first transistor, the first end of the third travel switch is connected to the first end of the fourth travel switch and the control end of the first transistor, the second end of the third travel switch and the second end of the fourth travel switch are grounded, the first end of the first transistor is connected to the bus, and the second end of the first transistor is connected to the battery.

10. A power supply control method, characterized in that: The control method is performed by the satellite solar array power supply control circuit according to any one of claims 1 to 9, and comprises: The switch module connects the battery and the control end of the forced shunt transistor in a first preset stage to turn on the forced shunt transistor; The forced shunt transistor forcedly shunts the electric energy generated by the solar cell array, so that the voltage transmitted from the solar cell array to the bus is zero.

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