A magnetic torquer drive and telemetry acquisition circuit for a spacecraft

Abstract

The present invention discloses a magnetic torque actuator drive and telemetry acquisition circuit for spacecraft, which is used to convert the received digital remote control signal into an analog voltage and output it to the drive control circuit of the drive power amplifier circuit. It is used to receive the analog voltage and output a corresponding drive current to the external drive power amplifier circuit according to the level of the voltage in proportion. It is used to collect the magnitude and direction of the drive current output by the drive power amplifier circuit to judge whether the response to the digital remote control signal is correct, namely the drive current telemetry acquisition circuit. The present invention uses a Darlington drive circuit structure composed of composite triodes to improve the drive ability and stability of the output current. By using the "virtual short" and "virtual open" characteristics of the input terminal of the operational amplifier, the control accuracy of the output current is improved. The structure of two zener diodes in parallel is adopted, so that the voltage at both ends of the output terminal can be controlled within a safe range. The real-time and accurate monitoring of the current can be realized by using the current sampling resistor to output the current telemetry through the triode.

Description

Technical Field

[0001] The present invention belongs to the technical field of aerospace telemetry, and particularly relates to a magnetic torquer drive and telemetry acquisition circuit for spacecraft. Background Art

[0002] The magnetic torquer drive circuit is a circuit that provides continuous power supply for the on-board magnetic torquer device. The magnetic torquer drive and telemetry acquisition circuit can accurately control the magnitude and direction of the coil current of the magnetic torquer and achieve the ability of self-check monitoring by receiving digital remote control commands. Usually, the magnetic torquer drive circuit for aerospace uses discrete devices such as resistors, diodes, and triodes to build the circuit. However, due to the sensitivity of the triode itself to temperature, as the conduction time of the triode prolongs, the junction temperature rises, and the current-voltage characteristic curve is prone to drift. Therefore, simply relying on the triode to achieve current amplification drive output is likely to cause problems such as unstable magnetic torquer drive current output, large error, and low reliability. In the current period of the rapid development of domestic commercial aerospace, it is imperative to design and manufacture a high-precision and high-reliability magnetic torquer drive circuit. Summary of the Invention

[0003] The technical objective of the present invention is to provide a magnetic torquer drive and telemetry acquisition circuit for spacecraft to solve the problems of unstable magnetic torquer drive current output, large error, and low reliability.

[0004] To solve the above problems, the technical solution of the present invention is as follows:

[0005] A magnetic torquer drive and telemetry acquisition circuit for spacecraft, comprising:

[0006] A drive control circuit, a drive power amplification circuit, and a drive current telemetry acquisition circuit;

[0007] The drive control circuit is signal-connected to the drive power amplification circuit and is used to convert the received digital remote control signal into an analog voltage quantity and output it to the drive power amplification circuit;

[0008] The drive power amplification circuit is used to receive the analog voltage quantity and output a corresponding drive current to the outside according to the level of the voltage;

[0009] The drive current telemetry acquisition circuit is signal-connected to the drive power amplification circuit and is used to collect the magnitude and direction of the drive current output by the drive power amplification circuit to the outside and generate telemetry acquisition parameters as a judgment basis for whether the response to the digital remote control signal is correct.

[0010] Specifically, the drive power amplification circuit includes a positive terminal input sub-circuit, a negative terminal input sub-circuit, a step-down sub-circuit, an amplification sub-circuit, and a protection sub-circuit;

[0011] One end of the positive terminal input sub - circuit is electrically connected to the positive pole of the power supply, and the other end of the positive terminal input sub - circuit is electrically connected to the input terminal of the amplification sub - circuit;

[0012] One end of the negative terminal input sub - circuit is electrically connected to the negative pole of the power supply, and the other end of the negative terminal input sub - circuit is electrically connected to the input terminal of the amplification sub - circuit;

[0013] One end of the buck sub - circuit is electrically connected to the output terminal of the drive control circuit, and the other end of the buck sub - circuit is electrically connected to the input terminal of the amplification sub - circuit;

[0014] The output terminal of the amplification sub - circuit is electrically connected to the outside through the protection sub - circuit, and is used to output the drive current to the outside after realizing circuit protection through the protection sub - circuit.

[0015] Specifically, the positive terminal input sub - circuit includes a first capacitor, a second capacitor, a third capacitor and a fourth capacitor;

[0016] One end of the first capacitor is electrically connected to the positive pole of the power supply, the other end of the first capacitor is electrically connected to one end of the third capacitor, and the other end of the third capacitor is grounded;

[0017] One end of the second capacitor is electrically connected to one end of the first capacitor, the other end of the second capacitor is electrically connected to one end of the fourth capacitor, and the other end of the fourth capacitor is grounded;

[0018] The end where the first capacitor and the second capacitor are electrically connected to each other is also electrically connected to the amplification sub - circuit.

[0019] Specifically, the negative terminal input sub - circuit includes a fifth capacitor, a sixth capacitor, a seventh capacitor and an eighth capacitor;

[0020] One end of the fifth capacitor is electrically connected to the negative pole of the power supply, the other end of the fifth capacitor is electrically connected to one end of the seventh capacitor, and the other end of the seventh capacitor is grounded;

[0021] One end of the sixth capacitor is electrically connected to one end of the fifth capacitor, the other end of the sixth capacitor is electrically connected to one end of the eighth capacitor, and the other end of the eighth capacitor is grounded;

[0022] The end where the fifth capacitor and the sixth capacitor are electrically connected to each other is also electrically connected to the amplification sub - circuit.

[0023] Specifically, the buck sub - circuit includes a first resistor and a second resistor. One end of the first resistor is electrically connected to the output terminal of the drive control circuit, the other end of the first resistor is electrically connected to one end of the second resistor and the input terminal of the amplification sub - circuit respectively, and the other end of the second resistor is grounded.

[0024] Specifically, the amplification sub - circuit includes an operational amplifier, a first triode, a second triode, a third triode and a fourth triode;

[0025] The positive input terminal of the operational amplifier is electrically connected to the buck sub-circuit, the negative input terminal of the operational amplifier is electrically connected to the drive current telemetry acquisition circuit, the positive power supply terminal of the operational amplifier is electrically connected to the positive terminal input sub-circuit, the negative power supply terminal of the operational amplifier is electrically connected to the negative terminal input sub-circuit, and the output terminal of the operational amplifier is electrically connected to the base of the second triode and the base of the third triode respectively;

[0026] The collector of the second triode is electrically connected to the collector of the first triode and is also electrically connected to the positive terminal input sub-circuit. The emitter of the second triode is electrically connected to the base of the first triode, and the emitter of the first triode is electrically connected to the protection sub-circuit;

[0027] The collector of the third triode is electrically connected to the collector of the fourth triode and is also electrically connected to the negative terminal input sub-circuit. The emitter of the third triode is electrically connected to the base of the fourth triode, and the emitter of the fourth triode is electrically connected to the protection sub-circuit.

[0028] Specifically, the protection sub-circuit includes a third resistor, a fourth resistor, a first voltage regulator diode, a second voltage regulator diode, a third voltage regulator diode, and a fourth voltage regulator diode;

[0029] The third resistor and the fourth resistor are connected in parallel, and one end is connected to the amplification sub-circuit, and the other end is electrically connected to the positive electrodes of the first voltage regulator diode and the second voltage regulator diode respectively. The negative electrode of the first voltage regulator diode is electrically connected to the negative electrode of the third voltage regulator diode, the negative electrode of the second voltage regulator diode is electrically connected to the negative electrode of the fourth voltage regulator diode, and the positive electrodes of the third voltage regulator diode and the fourth voltage regulator diode are both electrically connected to the drive current telemetry acquisition circuit.

[0030] Specifically, the drive control circuit includes a digital-to-analog conversion integrated sub-circuit, a fifth resistor, and a sixth resistor;

[0031] One end of the fifth resistor is connected to an external 5V voltage, and the other end of the fifth resistor is signal-connected to the chip select signal control terminal of the digital-to-analog conversion integrated sub-circuit;

[0032] The output pin of the digital-to-analog conversion integrated sub-circuit is signal-connected to the buck sub-circuit;

[0033] The input pin DARSTb of the digital-to-analog conversion integrated sub-circuit is electrically connected to one end of the sixth resistor, and the other end of the sixth resistor is connected to an external 5V voltage.

[0034] Specifically, the drive current telemetry acquisition circuit includes a seventh resistor, an eighth resistor, a ninth resistor, and a tenth resistor;

[0035] One end of the seventh resistor is the telemetry acquisition end, and the other end of the seventh resistor is electrically connected to one end of the eighth resistor, the ninth resistor, and the tenth resistor respectively. The other ends of the eighth resistor, the ninth resistor, and the tenth resistor are grounded;

[0036] The other end of the seventh resistor is also connected to the drive power amplifier circuit.

[0037] Due to the adoption of the above technical solutions, the present invention has the following advantages and positive effects compared with the prior art:

[0038] 1. The Darlington drive circuit structure composed of compound triodes is used in the present invention, greatly improving the drive ability and stability of the output current;

[0039] 2. The "virtual short" and "virtual open" characteristics of the input end of the operational amplifier OP77 are used in the present invention to improve the control accuracy of the output current. Within the drive range of ±150 mA, the error is controlled within ±2 mA;

[0040] 3. The voltage output end of the present invention adopts a structure in which two voltage stabilizing diodes are connected in parallel, which can control the voltage at both ends of the output end within a safe range, effectively preventing the harm caused by the induced electromotive force of the magnet torque circuit to the internal circuit during the switching of the drive current direction or the instant of turn-off;

[0041] 4. The present invention adopts a current sampling resistor and uses a triode to output current telemetry to realize real-time and accurate monitoring of the current, and realizes the isolation of the power line and the telemetry acquisition, ensuring the safety of the circuit. Description of the Drawings

[0042] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention.

[0043] Figure 1 is the circuit structure diagram of a magnet torque driver and telemetry acquisition circuit for a spacecraft of the present invention;

[0044] Figure 2 is the diagram of the change of key parameters during the implementation process of the present invention;

[0045] Figure 3 is the current direction diagram under the positive drive voltage of the present invention;

[0046] Figure 4 is the current direction diagram under the negative drive voltage of the present invention.

[0047] Description of the Reference Numerals

[0048] R1: The first resistor; R2: The second resistor; R3: The third resistor; R4: The fourth resistor; R5: The fifth resistor; R6: The sixth resistor; R7: The seventh resistor; R8: The eighth resistor; R9: The ninth resistor; R10: The tenth resistor; C1: The first capacitor; C2: The second capacitor; C3: The third capacitor; C4: The fourth capacitor; C5: The fifth capacitor; C6: The sixth capacitor; C7: The seventh capacitor; C8: The eighth capacitor; V1: The first triode; V2: The second triode; V3: The third triode; V4: The fourth triode; V5: The first voltage regulator diode; V6: The second voltage regulator diode; V7: The third voltage regulator diode; V8: The fourth voltage regulator diode. Detailed implementation manners

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will describe the specific implementation manners of the present invention with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other implementation manners can be obtained.

[0050] To make the drawings concise, only the parts related to the present invention are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, for components with the same structure or function in some drawings, only one of them is schematically shown, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation.

[0051] The following further details a magnetic torquer drive and telemetry acquisition circuit for spacecraft proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present invention will be clearer.

[0052] Embodiment

[0053] Referring to Figures 1 to 4 , this embodiment provides a magnetic torquer drive and telemetry acquisition circuit for spacecraft, which can be specifically divided into: a drive control circuit, a drive power amplifier circuit, and a drive current telemetry acquisition circuit. Among them, the drive control circuit is signal-connected to the drive power amplifier circuit, and the drive power amplifier circuit is also signal-connected to the drive current telemetry acquisition circuit. The drive control circuit is used to convert the received digital remote control signal into an analog voltage and output it to the drive power amplifier circuit; the drive power amplifier circuit is used to receive the analog voltage from the drive control circuit and directly output a corresponding drive current to the outside according to the level of the voltage; the drive current telemetry acquisition circuit is used to collect the magnitude and direction of the drive current output by the drive power amplifier circuit to the outside, and generate telemetry acquisition parameters as the basis for judging whether the response to the digital remote control signal is correct.

[0054] Next, a detailed description will be given along the signal transmission direction:

[0055] First, the drive control circuit will be described. It includes a digital-to-analog conversion integrated sub-circuit, a fifth resistor R5, and a sixth resistor R6. One end of the fifth resistor R5 is connected to an external 5V voltage, and the other end of the fifth resistor R5 is electrically connected to the chip select signal control terminal of the digital-to-analog conversion integrated sub-circuit. The input pin DARSTb of the digital-to-analog conversion integrated sub-circuit is electrically connected to one end of the sixth resistor R6, and the other end of the sixth resistor R6 is connected to the external 5V voltage. All the input pins DB0~DB11 of the digital-to-analog conversion integrated sub-circuit are used to connect to the external digital remote control signal. The input pins A0 and A1 of the digital-to-analog conversion integrated sub-circuit are used to select the address output by the chip. VDD is the positive power supply terminal of the digital-to-analog conversion integrated sub-circuit, VSS is the negative power supply terminal of the digital-to-analog conversion integrated sub-circuit, Vlog is the working voltage power supply terminal of the digital-to-analog conversion integrated sub-circuit, DGND is the power supply return line of the digital-to-analog conversion integrated sub-circuit, and VA, VB, VC, and VD are the output pins of D2 of the digital-to-analog conversion integrated sub-circuit. Figure 1 The VA output pin is signal-connected to the drive power amplifier circuit to output an analog voltage to the drive power amplifier circuit.

[0056] Immediately afterwards, refer to Figure 1 In this embodiment, the drive power amplifier circuit can be divided into a positive terminal input sub-circuit, a negative terminal input sub-circuit, a buck sub-circuit, an amplification sub-circuit, and a protection sub-circuit.

[0057] One end of the positive terminal input sub-circuit is electrically connected to the positive pole of the power supply, and the other end of the positive terminal input sub-circuit is electrically connected to the input end of the amplification sub-circuit; one end of the negative terminal input sub-circuit is electrically connected to the negative pole of the power supply, and the other end of the negative terminal input sub-circuit is electrically connected to the input end of the amplification sub-circuit; one end of the buck sub-circuit is electrically connected to the output end of the drive control circuit, and the other end of the buck sub-circuit is electrically connected to the input end of the amplification sub-circuit; the output end of the amplification sub-circuit is externally connected through the protection sub-circuit, and is used to output the drive current to the outside after circuit protection through the protection sub-circuit.

[0058] Specifically, the positive terminal input sub-circuit includes a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4. The first capacitor C1 and the third capacitor C3 are connected in series, the second capacitor C2 and the fourth capacitor C4 are connected in series, and the two sets of series capacitors are connected in parallel. The first capacitor C1 is also electrically connected to the second capacitor C2 and is simultaneously connected to the positive pole of the power supply. The third capacitor C3 is connected to the fourth capacitor C4 and grounded.

[0059] Specifically, the negative input sub-circuit includes a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, and an eighth capacitor C8, which are arranged in the same way as above, that is, the fifth capacitor C5 and the seventh capacitor C7 are connected in series, the sixth capacitor C6 and the eighth capacitor C8 are connected in series, and the two sets of series capacitors are connected in parallel. The fifth capacitor C5 is also electrically connected to the sixth capacitor C6 and is simultaneously electrically connected to the positive pole of the power supply. The seventh capacitor C7 is connected to the eighth capacitor C8 and is grounded.

[0060] Specifically, the buck sub-circuit includes a first resistor R1 and a second resistor R2. One end of the first resistor R1 is electrically connected to the output end of the drive control circuit. The other end of the first resistor R1 is respectively electrically connected to one end of the second resistor R2 and the input end of the amplification sub-circuit. The other end of the second resistor R2 is grounded.

[0061] Specifically, the amplification sub-circuit includes an operational amplifier, a first triode V1, a second triode V2, a third triode V3, and a fourth triode V4. The positive input terminal of the operational amplifier is electrically connected to the buck sub-circuit. The negative input terminal of the operational amplifier is electrically connected to the drive current telemetry acquisition circuit. The positive power supply terminal of the operational amplifier is electrically connected to the positive input sub-circuit. The negative power supply terminal of the operational amplifier is electrically connected to the negative input sub-circuit. The output terminal of the operational amplifier is respectively electrically connected to the base of the second triode V2 and the base of the third triode V3. The collector of the second triode V2 is electrically connected to the collector of the first triode V1 and is both electrically connected to the positive input sub-circuit. The emitter of the second triode V2 is electrically connected to the base of the first triode V1. The emitter of the first triode V1 is electrically connected to the protection sub-circuit. The collector of the third triode V3 is electrically connected to the collector of the fourth triode V4 and is both electrically connected to the negative input sub-circuit. The emitter of the third triode V3 is electrically connected to the base of the fourth triode V4. The emitter of the fourth triode V4 is electrically connected to the protection sub-circuit.

[0062] Specifically, the protection sub-circuit includes a third resistor R3, a fourth resistor R4, a first zener diode V5, a second zener diode V6, a third zener diode V7, and a fourth zener diode V8. The third resistor R3 and the fourth resistor R4 are connected in parallel. One end of the parallel resistors is connected to the amplification sub-circuit, and the other end is respectively electrically connected to the positive electrodes of the first zener diode V5 and the second zener diode V6. The negative electrode of the first zener diode V5 is electrically connected to the negative electrode of the third zener diode V7. The negative electrode of the second zener diode V6 is electrically connected to the negative electrode of the fourth zener diode V8. The positive electrodes of the third zener diode V7 and the fourth zener diode V8 are both electrically connected to the drive current telemetry acquisition circuit. It can be seen that Figure 1 at the positive electrodes of the first zener diode V5 and the second zener diode V6 are the drive output terminals, and at the positive electrodes of the third zener diode V7 and the fourth zener diode V8 are the drive output terminals.

[0063] Refer to Figure 1, finally, the drive current telemetry acquisition circuit includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a tenth resistor R10. The eighth resistor R8, the ninth resistor R9, and the tenth resistor R10 are connected in parallel with each other, and after being connected in parallel, they are connected in series with the seventh resistor R7. Therefore, one end of the seventh resistor R7 is the telemetry acquisition end, the other end of the seventh resistor R7 is electrically connected to one end of the eighth resistor R8, the ninth resistor R9, and the tenth resistor R10 respectively, and the other ends of the eighth resistor R8, the ninth resistor R9, and the tenth resistor R10 are grounded. In addition, two branches are branched out from the other end of the seventh resistor R7 and connected to the drive power amplifier circuit, one of which is connected to the negative input terminal of the operational amplifier, and the other is connected to the positive extreme ends of the third voltage regulator tube V7 and the fourth voltage regulator tube V8.

[0064] The working principle of this embodiment is as follows:

[0065] The digital-to-analog conversion integrated sub-circuit uses a DAC8412 to receive a digital quantity signal, converts it into an analog voltage and outputs it to the operational amplifier OP77. The OP77 is used to drive and control the Darlington-structured composite triode. By utilizing the current amplification ability of the triode, bidirectional control of the positive and negative currents of the load magnet torqueer is achieved. At the same time, the telemetry acquisition circuit can monitor the direction and magnitude of the load current in real time. Furthermore, this circuit has the characteristics of high control accuracy and strong driving ability.

[0066] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, provided that these changes fall within the scope of the claims of the present invention and their equivalent technologies, they still fall within the protection scope of the present invention.

Claims

1. A magnetic torquer drive and telemetry acquisition circuit for a spacecraft, characterized in that including: a drive control circuit, a drive power amplification circuit, and a drive current telemetry acquisition circuit; the drive control circuit is signal-connected to the drive power amplification circuit and is configured to convert a received digital remote control signal into an analog voltage signal and output it to the drive power amplification circuit; the drive power amplification circuit is configured to receive the analog voltage signal and output a corresponding drive current to the outside in proportion according to the voltage level; the drive current telemetry acquisition circuit is signal-connected to the drive power amplification circuit and is configured to collect the magnitude and direction of the drive current output by the drive power amplification circuit to the outside and generate telemetry acquisition parameters as a basis for judging whether the response to the digital remote control signal is correct; the drive power amplification circuit includes a positive terminal input sub-circuit, a negative terminal input sub-circuit, a step-down sub-circuit, an amplification sub-circuit, and a protection sub-circuit; one end of the positive terminal input sub-circuit is electrically connected to the positive pole of the power supply, and the other end of the positive terminal input sub-circuit is electrically connected to the input terminal of the amplification sub-circuit; one end of the negative terminal input sub-circuit is electrically connected to the negative pole of the power supply, and the other end of the negative terminal input sub-circuit is electrically connected to the input terminal of the amplification sub-circuit; one end of the step-down sub-circuit is electrically connected to the output terminal of the drive control circuit, and the other end of the step-down sub-circuit is electrically connected to the input terminal of the amplification sub-circuit; the output terminal of the amplification sub-circuit is electrically connected to the outside through the protection sub-circuit and is configured to output the drive current to the outside after circuit protection through the protection sub-circuit; the amplification sub-circuit includes an operational amplifier, a first triode, a second triode, a third triode, and a fourth triode; the positive input terminal of the operational amplifier is electrically connected to the step-down sub-circuit, the negative input terminal of the operational amplifier is electrically connected to the drive current telemetry acquisition circuit, the positive power supply terminal of the operational amplifier is electrically connected to the positive terminal input sub-circuit, the negative power supply terminal of the operational amplifier is electrically connected to the negative terminal input sub-circuit, and the output terminal of the operational amplifier is electrically connected to the base of the second triode and the base of the third triode respectively; the collector of the second triode is electrically connected to the collector of the first triode and is both electrically connected to the positive terminal input sub-circuit, the emitter of the second triode is electrically connected to the base of the first triode, and the emitter of the first triode is electrically connected to the protection sub-circuit; the collector of the third triode is electrically connected to the collector of the fourth triode and is both electrically connected to the negative terminal input sub-circuit, the emitter of the third triode is electrically connected to the base of the fourth triode, and the emitter of the fourth triode is electrically connected to the protection sub-circuit.

2. The magnetic torquer drive and telemetry acquisition circuit for spacecraft according to claim 1, wherein the positive terminal input sub-circuit includes a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor; one end of the first capacitor is electrically connected to the positive pole of the power supply, the other end of the first capacitor is electrically connected to one end of the third capacitor, and the other end of the third capacitor is grounded; one end of the second capacitor is electrically connected to one end of the first capacitor, the other end of the second capacitor is electrically connected to one end of the fourth capacitor, and the other end of the fourth capacitor is grounded; One end of the first capacitor and the second capacitor, which are electrically connected to each other, is also electrically connected to the amplifier sub-circuit.

3. The magnetic torquer drive and telemetry acquisition circuit for spacecraft according to claim 1, characterized in that The negative terminal input sub-circuit includes a fifth capacitor, a sixth capacitor, a seventh capacitor, and an eighth capacitor; One end of the fifth capacitor is electrically connected to the negative pole of the power supply terminal, the other end of the fifth capacitor is electrically connected to one end of the seventh capacitor, and the other end of the seventh capacitor is grounded; One end of the sixth capacitor is electrically connected to one end of the fifth capacitor, the other end of the sixth capacitor is electrically connected to one end of the eighth capacitor, and the other end of the eighth capacitor is grounded; One end of the fifth capacitor and the sixth capacitor, which are electrically connected to each other, is also electrically connected to the amplifier sub-circuit.

4. The magnetic torque actuator drive and telemetry acquisition circuit for spacecraft according to claim 1, characterized in that, The step-down sub-circuit includes a first resistor and a second resistor. One end of the first resistor is electrically connected to the output terminal of the drive control circuit. The other end of the first resistor is respectively electrically connected to one end of the second resistor and the input terminal of the amplifier sub-circuit, and the other end of the second resistor is grounded.

5. The magnetic torquer drive and telemetry acquisition circuit for spacecraft according to claim 1, characterized in that, The protection sub-circuit includes a third resistor, a fourth resistor, a first voltage regulator diode, a second voltage regulator diode, a third voltage regulator diode, and a fourth voltage regulator diode; The third resistor and the fourth resistor are arranged in parallel, and one end is connected to the amplifier sub-circuit, and the other end is respectively electrically connected to the positive poles of the first voltage regulator diode and the second voltage regulator diode. The negative pole of the first voltage regulator diode is electrically connected to the negative pole of the third voltage regulator diode. The negative pole of the second voltage regulator diode is electrically connected to the negative pole of the fourth voltage regulator diode. The positive poles of the third voltage regulator diode and the fourth voltage regulator diode are both electrically connected to the drive current telemetry acquisition circuit.

6. The magnetic torquer drive and telemetry acquisition circuit for spacecraft according to claim 1, characterized in that, The drive control circuit includes a digital-to-analog conversion integrated sub-circuit, a fifth resistor, and a sixth resistor; One end of the fifth resistor is connected to an external 5V voltage, and the other end of the fifth resistor is signal-connected to the chip select signal control terminal of the digital-to-analog conversion integrated sub-circuit; The output pin of the digital-to-analog conversion integrated sub-circuit is signal-connected to the step-down sub-circuit; The input pin DARSTb of the digital-to-analog conversion integrated sub-circuit is electrically connected to one end of the sixth resistor, and the other end of the sixth resistor is connected to an external 5V voltage.

7. The magnetic torque actuator drive and telemetry acquisition circuit for spacecraft according to claim 1, characterized in that The drive current telemetry acquisition circuit includes a seventh resistor, an eighth resistor, a ninth resistor, and a tenth resistor; One end of the seventh resistor is the telemetry acquisition end. The other end of the seventh resistor is respectively electrically connected to one end of the eighth resistor, the ninth resistor, and the tenth resistor. The other ends of the eighth resistor, the ninth resistor, and the tenth resistor are grounded; The other end of the seventh resistor is also connected to the drive power amplifier circuit.

Images