Three-phase electric control circuit applied to airborne products

Abstract

The application provides a three-phase electric control circuit applied to an airborne product, comprising a first control module, a second control module and a processor, the second control module is input with three-phase electricity, the second control module comprises a second power supply end and a second grounding end, the processor comprises two control ends, one of the control ends is electrically connected with the second grounding end and is used for controlling the turn-on and turn-off of the second grounding end, the other control end is electrically connected with the second power supply end through the first control module and is used for indirectly controlling the turn-on and turn-off of the second power supply end through the first control module; when the second power supply end and the second grounding end are both turned on, the second control module outputs three-phase electricity; when at least one of the second power supply end and the second grounding end is turned off, the second control module stops outputting three-phase electricity. The three-phase electric control circuit applied to the airborne product provided by the application avoids the problem that output control cannot be performed when three-phase electricity input is abnormal, and improves the reliability and safety of equipment work.

Description

Technical Field

[0001] This disclosure generally relates to the field of aviation electrical technology, and specifically to a three-phase electrical control circuit for use in airborne products. Background Technology

[0002] Three-phase AC power is a common type of power supply for aircraft, capable of powering various types of loads, especially those involving the control of certain critical signals, and is a vital guarantee for the normal operation of the aircraft. Typical three-phase AC power output circuits use a single relay for output, controlling a specific stage of the relay coil. This type of circuit cannot avoid output abnormalities that may occur when a single control signal malfunctions, easily leading to erroneous activation of downstream circuits and causing irreversible damage to certain critical signals on the aircraft, significantly reducing signal reliability and security. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a three-phase electrical control circuit for use in airborne products to solve the above problems.

[0004] This application provides a three-phase power control circuit for use in airborne products, including a first control module, a second control module, and a processor. The second control module receives three-phase power input and includes a second power supply terminal electrically connected to a first power source and a second grounding terminal connected to ground. The processor includes two control terminals, one of which is electrically connected to the second grounding terminal for controlling the on / off state of the second grounding terminal, and the other control terminal is electrically connected to the second power supply terminal through the first control module for indirectly controlling the on / off state of the second power supply terminal by controlling the first control module. When both the second power supply terminal and the second grounding terminal are on, the second control module is in a first state and outputs three-phase power. When at least one of the second power supply terminal and the second grounding terminal is off, the second control module is in a second state and stops outputting three-phase power.

[0005] According to the technical solution provided in the embodiments of this application, the first control module includes a first power supply terminal electrically connected to a second power supply, a first grounding terminal electrically connected to ground, a first signal terminal, and a second signal terminal. The first signal terminal is electrically connected to the first power supply, and the second signal terminal is electrically connected to the second power supply terminal. The processor is electrically connected to the first power supply terminal and is used to control the conduction and shutdown of the first power supply terminal. When the first power supply terminal is on, the first signal terminal and the second signal terminal are connected. When the first power supply is off, the first signal terminal and the second signal terminal are off.

[0006] According to the technical solution provided in the embodiments of this application, a self-testing module is also included. The self-testing module is electrically connected to the second control module. When the second control module is in the first state, the self-testing module is disconnected from the second control module; when the second control module is in the second state, the self-testing module is connected to the second control module for detecting the three-phase power.

[0007] According to the technical solution provided in the embodiments of this application, the self-detection module includes an optocoupler. The input side of the optocoupler includes three light-emitting units, and the output side includes three light-receiving units corresponding to the three light-emitting units. The input terminals of the three light-emitting units are all electrically connected to the second control module, and the output terminals of the three light-emitting units are all grounded. A rectifier diode and two current-limiting resistors are connected in series between the input terminal of the light-emitting unit and the second control module. A rectifier diode is also connected in series between the output terminal of the light-emitting unit and ground. A charging capacitor is connected in series between the two current-limiting resistors and the output terminal of the light-emitting unit. The light-receiving unit is used to output a detection result based on the signal from the light-emitting unit.

[0008] According to the technical solution provided in the embodiments of this application, the input terminal of the light-receiving unit is connected to a third power supply, and a pull-up resistor is connected in series between the input terminal of the light-receiving unit and the third power supply.

[0009] According to the technical solution provided in the embodiments of this application, a first discharge diode is connected in series between the first power supply terminal and the first ground terminal.

[0010] According to the technical solution provided in the embodiments of this application, a second discharge diode is connected in series between the second power supply terminal and the second ground terminal.

[0011] According to the technical solution provided in the embodiments of this application, both the first control module and the second control module are second relays.

[0012] Compared with the prior art, the beneficial effects of this application are as follows: by setting up a first control module, a second control module, and a processor, the second control module includes a second power supply terminal electrically connected to a first power source and a second grounding terminal electrically connected to ground. The processor includes two control terminals, one of which is electrically connected to the second grounding terminal, and the other control terminal is electrically connected to the second power supply terminal through the first control module. The processor can directly control the connection and disconnection between the second control module and ground, and can also indirectly control the connection and disconnection between the second control module and the first power source by controlling the connection and disconnection of the first control module. This allows for separate control of the two signals of the second control module. When three-phase power needs to be output, both ends of the second control module need to be controlled simultaneously to output a signal, avoiding the problem of not being able to control the output due to abnormal three-phase power input, thus improving the reliability and safety of the equipment. Attached Figure Description

[0013] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0014] Figure 1 A schematic diagram of the three-phase electrical control circuit for airborne products provided in this application;

[0015] Figure 2 A circuit diagram of a three-phase electrical control circuit for use in airborne products, provided in this application;

[0016] Figure 3 This is the circuit diagram for the self-test module;

[0017] Reference numerals: 10, First control module; 20, Second control module; 30, Processor; 40, First power supply; 50, Second power supply; 11, First power supply terminal; 12, First ground terminal; 13, First signal terminal; 14, Second signal terminal; 21, Second power supply terminal; 22, Second ground terminal. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Please refer to Figure 1This application provides a three-phase power control circuit for use in airborne products, including a first control module 10, a second control module 20, and a processor 30. The second control module 20 receives three-phase power input and includes a second power terminal 21 electrically connected to a first power supply 40 and a second ground terminal 22 connected to ground. The processor 30 includes two control terminals, one of which is electrically connected to the second ground terminal 22 and is used to control the on and off states of the second ground terminal 22. The other control terminal is electrically connected to the second power terminal 21 through the first control module 10 and is used to indirectly control the on and off states of the second power terminal 21 by controlling the first control module 10. When both the second power terminal 21 and the second ground terminal 22 are on, the second control module 20 is in a first state and outputs three-phase power. When at least one of the second power terminal 21 and the second ground terminal 22 is off, the second control module 20 is in a second state and stops outputting three-phase power.

[0021] The first control module 10 includes a first power supply terminal 11 electrically connected to the second power supply 50, a first grounding terminal 12 electrically connected to ground, a first signal terminal 13, and a second signal terminal 14. The first signal terminal 13 is electrically connected to the first power supply 40, and the second signal terminal 14 is electrically connected to the second power supply terminal 21. The processor 30 is electrically connected to the first power supply terminal 11 and is used to control the on and off states of the first power supply terminal 11. When the first power supply terminal 11 is on, the first signal terminal 13 and the second signal terminal 14 are connected. When the first power supply 40 is off, the first signal terminal 13 and the second signal terminal 14 are off.

[0022] In a preferred embodiment, both the first control module 10 and the second control module 20 are relays. Please refer to [reference needed]. Figure 2 The first control module 10 is a relay K1, and the second control module 20 is a relay K2. Relay K1 has 5 pins: pin 1 is the second signal terminal 14, pin 2 is the first signal terminal 13, pin 3 is unused, pin 4 is the first power supply terminal 11, and pin 5 is the second ground terminal. Relay K2 has 11 pins: pin X1+ is the second power supply terminal 21, pin X1- is the second ground terminal 22, and of the remaining 9 pins, pins A2, B2, and C2 are the three-phase power input terminals, pins A1, B1, and C1 are the three-phase power output terminals, and pins A3, B3, and C3 are external terminals. Optionally, the first power supply 40 and the second power supply 50 are 28V power supplies.

[0023] Specifically, pin 2 of relay K1 is connected to the first power supply 40, pin 1 is connected to pin X1+ of relay K2, and pin 4 is connected to the second power supply 50. Pin 4 is controlled by the processor 30 to switch on and off with the second power supply 50. When pin 4 is connected to the second power supply 50, pins 2 and 1 are connected; when pin 4 is disconnected from the second power supply 50, pins 2 and 3 are connected, and pin 5 is grounded. Pin X1- of relay K2 is grounded, and pin X1- is also controlled by the processor 30 to switch on and off with ground.

[0024] Working principle: Three-phase power is input to relay K2 through pins A2, B2, and C2. When the processor 30 controls pin 4 of relay K1 to conduct with the second power supply 50, pins 2 and 1 of relay K1 conduct. The first power supply 40 supplies power to pin X1+ of the second relay K2 through relay K1. At the same time, if the processor 30 controls pin X1- of the second relay K2 to conduct with ground, relay K2 controls pins A2, B2, and C2 and pins A1, B1, and C1 to conduct accordingly. Three-phase power can supply power to the load through pins A1, B1, and C1. By controlling pins X1+ and X1- of relay K2 separately, the problem of incorrect three-phase power output caused by abnormal control signal of one line is avoided.

[0025] In a preferred embodiment, a self-detection module is further included. The self-detection module is electrically connected to the second control module 20. When the second control module 20 is in the first state, the self-detection module is disconnected from the second control module 20. When the second control module 20 is in the second state, the self-detection module is connected to the second control module 20 for detecting the three-phase power.

[0026] The self-detection module includes an optocoupler. The input side of the optocoupler includes three light-emitting units, and the output side includes three light-receiving units corresponding to the three light-emitting units. The input terminals of the three light-emitting units are all electrically connected to the second control module 20, and the output terminals of the three light-emitting units are all grounded. A rectifier diode and two current-limiting resistors are connected in series between the input terminal of the light-emitting unit and the second control module 20. A rectifier diode is also connected in series between the output terminal of the light-emitting unit and ground. A charging capacitor is connected in series between the two current-limiting resistors and the output terminal of the light-emitting unit. The light-receiving units are used to output detection results based on the signals from the light-emitting units.

[0027] In a preferred embodiment, the input terminal of the light-receiving unit is connected to a third power supply, and a pull-up resistor is connected in series between the input terminal of the light-receiving unit and the third power supply.

[0028] For details, please refer to Figure 2and Figure 3 The self-test module includes an optocoupler B1, rectifier diodes V3-V8, charging capacitors C1-C3, current-limiting resistors R1-R6, and pull-up resistors R7-R9. The third power supply is DC 3.3V. The optocoupler B1 has 16 pins. Pin A3 of the relay K2 is connected to pin 1 of diode V3; pin 2 of diode V3 is connected to pin 1 of resistor R1; pin 2 of resistor R1 is connected to pin 1 of capacitor C1; pin 1 of capacitor C1 is also connected to pin 1 of resistor R2; pin 2 of resistor R2 is connected to pin 1 of optocoupler B1; pin 2 of optocoupler B1 is connected to pin 2 of capacitor C1; pin 2 of capacitor C1 is connected to pin 1 of diode V4; and the diode... Pin 2 of V4 is connected to the middle phase of the three-phase power supply, which is the common reference ground for the three-phase power supply; pin B3 of the second relay K2 is connected to pin 1 of diode V5; pin 2 of diode V5 is connected to pin 1 of resistor R3; pin 2 of resistor R3 is connected to pin 1 of capacitor C2; pin 1 of capacitor C2 is also connected to pin 1 of resistor R4; pin 2 of resistor R4 is connected to pin 3 of optocoupler B1; pin 4 of optocoupler B1 is connected to pin 2 of capacitor C2; and the capacitor C2... Pin 2 of relay K2 is connected to pin 1 of diode V6, and pin 2 of diode V6 is connected to the middle phase of the three-phase power supply. Pin C3 of relay K2 is connected to pin 1 of diode V7, pin 2 of diode V7 is connected to pin 1 of resistor R5, pin 2 of resistor R5 is connected to pin 1 of capacitor C3, pin 1 of capacitor C3 is also connected to pin 1 of resistor R6, pin 2 of resistor R6 is connected to pin 5 of optocoupler B1, pin 6 of optocoupler B1 is connected to pin 2 of capacitor C3, and pin 2 of capacitor C3 is connected to... Pin 1 of diode V8 is connected, and pin 2 of diode V8 is connected to the middle phase of the three-phase power supply; pin 1 of resistor R7 is connected to 3.3V, pin 2 of resistor R7 is connected to pin 16 of optocoupler B1, pin 1 of resistor R8 is connected to 3.3V, pin 2 of resistor R8 is connected to pin 14 of optocoupler B1, pin 1 of resistor R9 is connected to 3.3V, pin 2 of resistor R9 is connected to pin 12 of optocoupler B1, and pins 15, 13, and 11 of optocoupler B1 are all grounded.

[0029] Working principle: Resistors R1, R3 and R5 charge capacitors C1, C2 and C3 respectively. After they are fully charged, resistors R2, R4 and R6 discharge the three light-emitting units of optocoupler B1, thereby turning on optocoupler B1 and realizing the monitoring and management of the three-phase voltage, so as to facilitate timely reporting of abnormal situations.

[0030] In a preferred embodiment, a first discharge diode is connected in series between the first power supply terminal 11 and the first ground terminal 12.

[0031] For details, please refer to Figure 2The first bleeder diode V1 is connected to pin 5 of relay K1, and the first bleeder diode V1 is connected to pin 4 of relay K1. Relay K1 is used to realize the first-level control of three-phase power output, and the first bleeder diode V1 is used to realize the rapid discharge of induced electromotive force when relay K1 is disconnected.

[0032] In a preferred embodiment, a second discharge diode is connected in series between the second power supply terminal 21 and the second ground terminal 22.

[0033] For details, please refer to Figure 2 The second bleeder diode V2 has pin 1 connected to pin X1- of relay K2, and the second bleeder diode V3 has pin 2 connected to pin X1+ of relay K2. Relay K2 is used to realize the two-stage control of three-phase power output, and the second bleeder diode V2 is used to realize the rapid discharge of induced electromotive force when relay K2 is disconnected.

[0034] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A three-phase electrical control circuit for use in airborne products, characterized in that, The system includes a first control module (10), a second control module (20), and a processor (30). The second control module (20) receives three-phase power input and includes a second power terminal (21) electrically connected to a first power source (40) and a second ground terminal (22) connected to ground. The processor (30) includes two control terminals, one of which is electrically connected to the second ground terminal (22) and is used to control the conduction and shutdown of the second ground terminal (22). The other control terminal is electrically connected to the second power terminal (21) through the first control module (10) and is used to indirectly control the conduction and shutdown of the second power terminal (21) by controlling the first control module (10). When both the second power terminal (21) and the second ground terminal (22) are on, the second control module (20) is in a first state and outputs three-phase power. When at least one of the second power terminal (21) and the second ground terminal (22) is off, the second control module (20) is in a second state and stops outputting three-phase power. The first control module (10) includes a first power supply terminal (11) electrically connected to the second power supply (50), a first ground terminal (12) electrically connected to ground, a first signal terminal (13) and a second signal terminal (14). The first signal terminal (13) is electrically connected to the first power supply (40), and the second signal terminal (14) is electrically connected to the second power supply terminal (21). The processor (30) is electrically connected to the first power supply terminal (11) and is used to control the conduction and shutdown of the first power supply terminal (11). When the first power supply terminal (11) is on, the first signal terminal (13) and the second signal terminal (14) are connected. When the first power supply (40) is off, the first signal terminal (13) and the second signal terminal (14) are off.

2. The three-phase electrical control circuit for airborne products according to claim 1, characterized in that, It also includes a self-testing module, which is electrically connected to the second control module (20). When the second control module (20) is in the first state, the self-testing module is disconnected from the second control module (20); when the second control module (20) is in the second state, the self-testing module is connected to the second control module (20) for detecting three-phase electricity.

3. The three-phase electrical control circuit for airborne products according to claim 2, characterized in that, The self-detection module includes an optocoupler. The input side of the optocoupler includes three light-emitting units, and the output side includes three light-receiving units corresponding to the three light-emitting units. The input terminals of the three light-emitting units are all electrically connected to the second control module (20), and the output terminals of the three light-emitting units are all grounded. A rectifier diode and two current-limiting resistors are connected in series between the input terminal of the light-emitting unit and the second control module (20). A rectifier diode is also connected in series between the output terminal of the light-emitting unit and ground. A charging capacitor is connected in series between the two current-limiting resistors and the output terminal of the light-emitting unit. The light-receiving unit is used to output the detection result based on the signal from the light-emitting unit.

4. The three-phase electrical control circuit for airborne products according to claim 3 is characterized in that, The input terminal of the light-receiving unit is connected to a third power supply, and a pull-up resistor is connected in series between the input terminal of the light-receiving unit and the third power supply.

5. The three-phase electrical control circuit for airborne products according to claim 4, characterized in that, A first discharge diode is connected in series between the first power supply terminal (11) and the first ground terminal (12).

6. The three-phase electrical control circuit for airborne products according to claim 5, characterized in that, A second discharge diode is connected in series between the second power supply terminal (21) and the second ground terminal (22).

7. The three-phase electrical control circuit for airborne products according to claim 6, characterized in that, Both the first control module (10) and the second control module (20) are relays.

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