A power device for a machine room of air traffic control equipment

Abstract

The present invention relates to a machine room power device for air traffic control equipment, comprising a main power supply, a backup power supply, an automatic transfer switch and a transformer circuit, wherein the main power supply comprises an input power filter circuit, an AC / DC conversion circuit, a DC / AC inverter, an output power filter circuit, a charger, a battery, a DC / DC boost circuit and an overcurrent and overvoltage protection circuit; the backup power supply comprises a generator and a voltage and current stabilizing circuit, wherein the output end of the generator is connected to the input end of the voltage and current stabilizing circuit; the automatic transfer switch comprises a control chip, a first switching circuit and a second switching circuit, wherein the output end of the output power filter circuit, the output end of the voltage and current stabilizing circuit, the first switching circuit and the second switching circuit are respectively connected to the control chip, and the output end of the output power filter circuit and the output end of the voltage and current stabilizing circuit are further connected to the input end of the transformer circuit, and the output end of the transformer circuit is connected to the air traffic control equipment. The present invention can provide uninterrupted power supply to the air traffic control equipment and ensure the safe operation of the aircraft.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and in particular to an electric power device for a machine room of air traffic control equipment. Background Art

[0002] With the continuous development of my country's aviation industry and aviation technology, the technical content of airport equipment has also been significantly improved, and the application of various air traffic control equipment has provided important guarantees for the safety of aircraft. In order to ensure the safe operation of aircraft, air traffic control equipment must be kept in working condition uninterruptedly, which requires the power supply of the power equipment in the computer room that provides power for air traffic control equipment to ensure uninterrupted power supply to ensure the stable working condition of air traffic control equipment. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a machine room power device for air traffic control equipment which can provide uninterrupted power supply to air traffic control equipment and ensure the safe operation of aircraft.

[0004] The present invention discloses an electric power device for a machine room of air traffic control equipment, comprising a main power supply, a backup power supply, an automatic transfer switch and a transformer circuit, wherein the main power supply and the backup power supply are arranged in parallel, the main power supply comprises an input power supply filter circuit, an AC / DC conversion circuit, a DC / AC inverter, an output power supply filter circuit, a charger, a battery, a DC / DC boost circuit and an overcurrent and overvoltage protection circuit, the input end of the input power supply filter circuit is connected to the mains, the output end of the input power supply filter circuit is respectively connected to the input end of the charger, the AC / DC conversion circuit and the input end of the overcurrent and overvoltage protection circuit, the input end of the charger is connected to the mains, and the output end of the charger is connected to the input end of the charger. The output end of the overcurrent and overvoltage protection circuit is connected to the input end of the battery, the output end of the battery is connected to the input end of the DC / DC boost circuit, the output ends of the AC / DC conversion circuit and the DC / DC boost circuit are respectively connected to the input end of the DC / AC inverter, and the output end of the DC / AC inverter is selectively connected to the input end of the output power filter circuit through a switch, wherein a switch is provided between the DC / AC inverter and the output power filter circuit, the output end of the overcurrent and overvoltage protection circuit is selectively connected to the switch, and the output end of the output power filter circuit is connected to the input end of the automatic transfer switch;

[0005] The backup power supply includes a generator and a voltage and current stabilizing circuit, the output end of the generator is connected to the input end of the voltage and current stabilizing circuit, and the output end of the voltage and current stabilizing circuit is connected to the input end of the automatic transfer switch;

[0006] The automatic transfer switch includes a control chip, a first switching circuit and a second switching circuit. The output end of the output power filter circuit and the output end of the voltage and current stabilization circuit are connected to the input end of the control chip. The input end of the first switching circuit and the input end of the second switching circuit are respectively connected to the output end of the control chip so that the first switching circuit can selectively output the main power supply, or the second switching circuit can output the backup power supply. The output end of the first switching circuit and the output end of the second switching circuit are both connected to the transformer circuit. The transformer circuit has multiple output ends, which correspond to the output of multiple voltages respectively, so as to supply power to multiple air traffic control equipment respectively.

[0007] Preferably, the input power filter circuit and the output power filter circuit both include a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first inductor, a first resistor and a transformer, one end of the first capacitor is connected to one end of the first inductor, the other end of the first inductor is connected to one end of the second capacitor, the other end of the second capacitor is connected to the other end of the first capacitor, the third capacitor and the fourth capacitor are connected in series, the series-connected third capacitor and fourth capacitor are further connected in parallel with the second capacitor, one end of the first resistor is connected to one end of the third capacitor, the other end of the first resistor is connected to the primary of the transformer, and the secondary of the transformer is connected to the fifth capacitor.

[0008] In any of the above schemes, preferably, the overcurrent and overvoltage protection circuit includes a first comparator, a first diode, a first LED prompt circuit, a first logic circuit, a second comparator, a second diode, a second LED prompt circuit, and a second logic circuit.

[0009] The positive input terminal of the first comparator is connected to the output terminal of the input power filter circuit, the negative input terminal of the first comparator is connected to the first variable resistor, the output terminal of the first comparator is connected to one end of the first bias resistor and the reverse end of the first diode, and the reverse end of the first diode is further connected to the first LED prompt circuit and the first logic circuit.

[0010] The positive input terminal of the second comparator is connected to the output terminal of the input power filter circuit, the negative input terminal of the second comparator is connected to the second variable resistor, the output terminal of the second comparator is connected to one end of the second bias resistor and the reverse end of the second diode, and the reverse end of the second diode is further connected to the second LED prompt circuit and the second logic circuit.

[0011] The output ends of the first logic circuit and the second logic circuit are respectively connected to the input pulse prohibition end of the TC787 trigger circuit, and the input pulse prohibition end of the TC787 trigger circuit is connected to the switch.

[0012] In any of the above solutions, preferably, a reset button is provided between the input ends of the first diode and the second diode and the power supply.

[0013] In any of the above solutions, preferably, the control chip is selected as STM32F103CBT6.

[0014] In any of the above solutions, preferably, the DC / DC boost circuit uses a DC / DC boost circuit of model HXN-AP.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0016] 1. The main power supply and the backup power supply can be automatically switched under the action of the automatic transfer switch. The control chip receives the voltage signal of the main power supply, detects the voltage signal of the main power supply, and judges the detection result. When the main power supply is normal, the control chip controls the first switching circuit to close and the second switching circuit to separate to protect the main power supply to connect to the air traffic control equipment. When the main power supply fails, the control chip controls the first switching circuit to separate and the second switching circuit to close. At the same time, the control chip sends a signal start signal to start the generator and the backup power supply to ensure the continuous and stable operation of the air traffic control equipment. When the main power supply returns to normal, the control chip automatically controls the first circuit breaker and the second circuit breaker to switch, and continues to use the main power supply for power supply, thereby realizing uninterrupted power supply for the air traffic control equipment, ensuring the safe operation of the aircraft, safe and reliable, and with a high degree of automation.

[0017] 2. After the mains power is filtered by the input power filter circuit, part of it is converted into direct current by the AC / DC conversion circuit and supplied to the DC / AC inverter, and then output to the load by the output power filter circuit. The other part is charged to the charger, and the charger charges the battery, and then output to the load by the DC / DC boost circuit, DC / AC inverter, and output power filter circuit in sequence. When a power outage occurs suddenly, the charger charges the battery, and the battery provides the required power to the load to ensure normal power supply.

[0018] 3. The input power filter circuit and the output power filter circuit are used to filter out specific bands in the input power and output power, which have the functions of suppression and anti-interference, and provide stable input power and output power. The voltage and current stabilizing circuit has the function of stabilizing the voltage and current of the power output of the generator, and provides stable output power.

[0019] 4. Overcurrent and overvoltage protection circuit On the one hand, the protection speed is fast. By using the comparison circuit, the control point directly controls the output pulse prohibition end of the TC787 trigger circuit, the flipping speed is fast, and the circuit components are few. The protection circuit has a short signal transmission time, fast protection speed, high sensitivity, and low energy consumption; on the other hand, when the main power supply is in normal working state, the control electrode of the memory circuit is controlled to zero level by the comparison circuit. At the same time, the overcurrent indicator LED1 and the resistor R6 are connected in series to the reverse end of the first diode SCR1, and the overcurrent indicator LED2 and the resistor R7 are connected in series to the reverse end of the second diode SCR2, which improves the trigger level of the first diode SCR1 and the second diode SCR2, has strong anti-interference ability, avoids the out-of-control phenomenon of not acting when it should act, and erroneously acting when it should not act, and greatly improves the reliability of the protection circuit. In addition, the overall circuit of the overcurrent and overvoltage protection circuit 2 is simple, easy to debug and maintain, and low cost.

[0020] The following is a further description of a power device for a machine room of air traffic control equipment according to the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural block diagram of a power device in a machine room for air traffic control equipment of the present invention;

[0022] Figure 2 This is the circuit schematic diagram of the automatic transfer switch;

[0023] Figure 3 It is the circuit schematic diagram of input power filter circuit and output power filter circuit;

[0024] Figure 4 This is the circuit schematic diagram of the voltage and current stabilization circuit;

[0025] Figure 5 It is the circuit schematic diagram of the transformer circuit;

[0026] Figure 6 This is the circuit schematic diagram of the overvoltage and overcurrent protection circuit;

[0027] Among them: 1. Input power filter circuit; 2. Overcurrent and overvoltage protection circuit; 3. AC / DC conversion circuit; 4. DC / AC inverter; 5. Output power filter circuit; 6. Charger; 7. Battery; 8. DC / DC boost circuit; 9. Generator; 10. Current and voltage stabilization circuit; 11. Automatic transfer switch; 12. Voltage conversion circuit; 13. Air traffic control equipment; 14. First switching circuit; 15. Second switching circuit; 16. Control chip; 17. First LED prompt circuit; 18. First logic circuit; 19. Second logic circuit; 20. Second LED prompt circuit. DETAILED DESCRIPTION

[0028] like Figure 1 As shown, the present invention is a power device for a machine room of air traffic control equipment, comprising a main power supply, a backup power supply, an automatic transfer switch 11 and a transformer circuit 12, wherein the main power supply and the backup power supply are arranged in parallel, the main power supply comprises an input power filter circuit 1, an AC / DC conversion circuit 3, a DC / AC inverter 4, an output power filter circuit 5, a charger 6, a battery 7, a DC / DC boost circuit 8 and an overcurrent and overvoltage protection circuit 2, the input end of the input power filter circuit 1 is connected to the mains, the output end of the input power filter circuit 1 is respectively connected to the input end of the charger 6, the AC / DC conversion circuit 3, and the overcurrent and overvoltage protection circuit 2, The output end of the charger 6 is connected to the input end of the battery 7, the output end of the battery 7 is connected to the input end of the DC / DC boost circuit 8, the output ends of the AC / DC conversion circuit 3 and the DC / DC boost circuit 8 are respectively connected to the input end of the DC / AC inverter 4, and the output end of the DC / AC inverter 4 is selectively connected to the input end of the output power filter circuit 5 through a switch, wherein a switch is provided between the DC / AC inverter 4 and the output power filter circuit 5, the output end of the overcurrent and overvoltage protection circuit 2 is selectively connected to the switch, and the output end of the output power filter circuit 5 is connected to the input end of the automatic transfer switch 11.

[0029] After the mains power is filtered by the input power filter circuit 1, a part of it is converted into direct current by the AC / DC conversion circuit 3 and supplied to the DC / AC inverter 4, and output to the load through the output power filter circuit 5, and the other part is charged to the charger 6, and the charger 6 charges the battery 7, and is output to the load through the DC / DC boost circuit 8, the DC / AC inverter 4, and the output power filter circuit 5 in sequence. When a sudden power outage occurs, the charger 6 charges the battery 7, and the battery 7 provides the required power to the load to ensure that normal power supply is maintained.

[0030] The backup power supply includes a generator 9 and a voltage and current stabilizing circuit. The output end of the generator 9 is connected to the input end of the voltage and current stabilizing circuit, and the output end of the voltage and current stabilizing circuit is connected to the input end of the automatic transfer switch 11. The voltage and current stabilizing circuit has the function of stabilizing the voltage and current of the power output of the generator 9, and provides a stable output power supply. Figure 4 As shown, this is the circuit schematic diagram of the voltage and current stabilizing circuit.

[0031] like Figure 2As shown, the automatic transfer switch 11 includes a control chip 16, a first switching circuit 14 and a second switching circuit 15. The output end of the output power filter circuit 5 and the output end of the voltage and current stabilization circuit are connected to the input end of the control chip 16. The input end of the first switching circuit 14 and the input end of the second switching circuit 15 are respectively connected to the output end of the control chip 16, so that the main power supply can be selectively output by the first switching circuit 14, or the backup power supply can be output by the second switching circuit 15. The output end of the first switching circuit 14 and the output end of the second switching circuit 15 are both connected to the transformer circuit 12. The transformer circuit 12 has multiple output ends. The output end of the transformer circuit 12 is adjusted as needed to output multiple voltages respectively to supply power to multiple air traffic control equipment 13 respectively.

[0032] like Figure 5 As shown, it is a circuit schematic diagram of the voltage conversion circuit 12.

[0033] The main power supply and the backup power supply can be automatically switched under the action of the automatic switching switch 11. The control chip 16 receives the voltage signal of the main power supply, detects the voltage signal of the main power supply, and judges the detection result. When the main power supply is normal, the control chip 16 controls the first switching circuit 14 to close and the second switching circuit 15 to open to protect the main power supply to connect the air traffic control equipment 13. When the main power supply fails, the control chip 16 controls the first switching circuit 14 to open and the second switching circuit 15 to close. At the same time, the control chip 16 sends a signal start signal to start the generator 9 and the backup power supply to ensure that the air traffic control equipment 13 works continuously and stably. When the main power supply returns to normal, the control chip 16 automatically controls the first circuit breaker and the second circuit breaker to switch, and continues to use the main power supply for power supply, thereby realizing uninterrupted power supply for the air traffic control equipment 13, ensuring the safe operation of the aircraft, safe and reliable, and with a high degree of automation.

[0034] Further, such as Figure 3 As shown, the input power filter circuit 1 and the output power filter circuit 5 both include a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first inductor L1, a first resistor R0 and a transformer, one end of the first capacitor C1 is connected to one end of the first inductor L1, the other end of the first inductor L1 is connected to one end of the second capacitor C2, the other end of the second capacitor C2 is connected to the other end of the first capacitor C1, the third capacitor C3 and the fourth capacitor C4 are connected in series, the third capacitor C3 and the fourth capacitor C4 connected in series are further connected in parallel with the second capacitor C2, one end of the first resistor R0 is connected to one end of the third capacitor C3, the other end of the first resistor R0 is connected to the primary of the transformer, and the secondary of the transformer is connected to the fifth capacitor C5. The input power filter circuit 1 and the output power filter circuit 5 are used to filter out specific bands in the input power and the output power, have the functions of suppressing and preventing interference, and provide stable input power and output power.

[0035] Further, such as Figure 6 As shown, the overcurrent and overvoltage protection circuit 2 includes a first comparator IC1, a first diode SCR1, a first LED prompt circuit 17, a first logic circuit 18, a second comparator IC2, a second diode SCR2, a second LED prompt circuit 20, and a second logic circuit 19.

[0036] The positive input terminal of the first comparator IC1 is connected to the output terminal of the input power filter circuit 1, the negative input terminal of the first comparator IC1 is connected to the first variable resistor W1, the output terminal of the first comparator IC1 is connected to one end of the first bias resistor R2 and the reverse end of the first diode SCR1, and the reverse end of the first diode SCR1 is further connected to the first LED prompt circuit 17 and the first logic circuit 18.

[0037] The positive input terminal of the second comparator IC2 is connected to the output terminal of the input power filter circuit 1, the negative input terminal of the second comparator IC1 is connected to the second variable resistor W2, the output terminal of the second comparator IC2 is connected to one end of the second bias resistor R4 and the reverse end of the second diode SCR2, and the reverse end of the second diode SCR2 is further connected to the second LED prompt circuit 20 and the second logic circuit 19.

[0038] The output ends of the first logic circuit 18 and the second logic circuit 19 are respectively connected to the input pulse inhibiting end of the TC787 trigger circuit (ie, the P5 end of the TC787 trigger circuit), and the output pulse inhibiting end of the TC787 trigger circuit is connected to the switch.

[0039] The overvoltage and overcurrent protection circuit ensures the normal operation of the main power supply. When the current value or voltage value of the mains input exceeds the limit, the overcurrent and overvoltage protection circuit 2 performs unloading protection to prevent overload. When the main power supply is in normal operation, during overcurrent protection, the input voltage formed by the current signal received by the first comparator IC1 is less than the set protection fixed value voltage, the first comparator IC1 outputs a low level, the first diode SCR1 is in the cut-off state, and the overcurrent indicator light is off; when the input voltage formed by the current signal received by the first comparator IC1 is greater than the set protection fixed value voltage, the first comparator IC1 outputs a high level, the first diode SCR1 is turned on, the overcurrent indicator light is on, and the fault signal is memorized. At the same time, the first logic circuit 18 makes the output pulse prohibition end of the TC787 trigger circuit become a high level, so that the control angle of the rectifier trigger pulse is greater than 90 degrees, and the rectifier bridge is in the inverter working state, which plays a protective role. During overvoltage protection, the input voltage formed by the voltage signal received by the second comparator IC2 is less than the set protection setting voltage, the second comparator IC2 outputs a low level, the second diode SCR2 is in the cut-off state, and the overcurrent indicator light is off; when the input voltage formed by the voltage signal received by the second comparator IC2 is greater than the set protection setting voltage, the second comparator IC2 outputs a high level, the second diode SCR2 is turned on, the overvoltage indicator light is on, and the fault signal is memorized. At the same time, the second logic circuit 19 makes the output pulse prohibition end of the TC787 trigger circuit become a high level, so that the control angle of the rectifier trigger pulse is greater than 90 degrees, and the rectifier bridge is in the inverter working state, which plays a protective role.

[0040] On the one hand, the overcurrent and overvoltage protection circuit 2 of this embodiment has a fast protection speed. By adopting a comparison circuit, the control point directly controls the output pulse prohibition end of the TC787 trigger circuit, the flipping speed is fast, and at the same time, the circuit components are few, the protection circuit has a short signal transmission time, the protection speed is fast, the sensitivity is high, and the energy consumption is low; on the other hand, when the main power supply is in a normal working state, the control electrode of the memory circuit is controlled to a zero level by the comparison circuit, and at the same time, the overcurrent indicator LED1 and the resistor R6 are connected in series to the reverse end of the first diode SCR1, and the overcurrent indicator LED2 and the resistor R7 are connected in series to the reverse end of the second diode SCR2, which improves the triggering level of the first diode SCR1 and the second diode SCR2, has a strong anti-interference ability, avoids the out-of-control phenomenon of not acting when it should act, and erroneously acting when it should not act, and greatly improves the reliability of the protection circuit. In addition, the overcurrent and overvoltage protection circuit 2 has a simple overall circuit, is easy to debug and maintain, and has a low cost.

[0041] Furthermore, a reset button is provided between the forward ends of the first diode SCR1 and the second diode SCR2 and the power supply.

[0042] Furthermore, the control chip 16 is STM32F103CBT6.

[0043] Furthermore, the DC / DC boost circuit 8 uses a DC / DC boost circuit of model HXN-AP.

[0044] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A power device for a machine room of air traffic control equipment, characterized in that: It comprises a main power supply, a backup power supply, an automatic transfer switch and a voltage conversion circuit. The main power supply is arranged in parallel with the backup power supply. The main power supply comprises an input power supply filter circuit, an AC / DC conversion circuit, a DC / AC inverter, an output power supply filter circuit, a charger, a battery, a DC / DC boost circuit and an overcurrent and overvoltage protection circuit. The input end of the input power supply filter circuit is connected to the mains, the output end of the input power supply filter circuit is respectively connected to the input ends of the charger, the AC / DC conversion circuit and the overcurrent and overvoltage protection circuit, the output end of the charger is connected to the input end of the battery, the output end of the battery is connected to the input end of the DC / DC boost circuit, the output ends of the AC / DC conversion circuit and the DC / DC boost circuit are respectively connected to the input end of the DC / AC inverter, the output end of the DC / AC inverter is selectively connected to the input end of the output power supply filter circuit through a switch, wherein a switch is provided between the DC / AC inverter and the output power supply filter circuit, the output end of the overcurrent and overvoltage protection circuit is selectively connected to the switch, and the output end of the output power supply filter circuit is connected to the input end of the automatic transfer switch; The backup power supply includes a generator and a voltage and current stabilizing circuit, the output end of the generator is connected to the input end of the voltage and current stabilizing circuit, and the output end of the voltage and current stabilizing circuit is connected to the input end of the automatic transfer switch; The automatic transfer switch includes a control chip, a first switching circuit and a second switching circuit. The output end of the output power filter circuit and the output end of the voltage and current stabilization circuit are connected to the input end of the control chip. The input end of the first switching circuit and the input end of the second switching circuit are respectively connected to the output end of the control chip, so that the first switching circuit can selectively output the main power supply, or the second switching circuit can output the standby power supply. The output end of the first switching circuit and the output end of the second switching circuit are both connected to the transformer circuit. The transformer circuit has multiple output ends, which correspond to the output of multiple voltages, so as to supply power to multiple air traffic control devices respectively. The input power filter circuit and the output power filter circuit both include a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first inductor, a first resistor and a transformer, one end of the first capacitor is connected to one end of the first inductor, the other end of the first inductor is connected to one end of the second capacitor, the other end of the second capacitor is connected to the other end of the first capacitor, the third capacitor and the fourth capacitor are connected in series, the third capacitor and the fourth capacitor connected in series are further connected in parallel with the second capacitor, one end of the first resistor is connected to one end of the third capacitor, the other end of the first resistor is connected to the primary of the transformer, and the secondary of the transformer is connected to the fifth capacitor; The overcurrent and overvoltage protection circuit includes a first comparator, a first diode, a first LED prompt circuit, a first logic circuit, a second comparator, a second diode, a second LED prompt circuit, and a second logic circuit. The positive input terminal of the first comparator is connected to the output terminal of the input power filter circuit, the negative input terminal of the first comparator is connected to the first variable resistor, the output terminal of the first comparator is connected to one end of the first bias resistor and the reverse end of the first diode, and the reverse end of the first diode is further connected to the first LED prompt circuit and the first logic circuit. The positive input terminal of the second comparator is connected to the output terminal of the input power filter circuit, the negative input terminal of the second comparator is connected to the second variable resistor, the output terminal of the second comparator is connected to one end of the second bias resistor and the reverse end of the second diode, and the reverse end of the second diode is further connected to the second LED prompt circuit and the second logic circuit. The output ends of the first logic circuit and the second logic circuit are respectively connected to the input pulse prohibition end of the TC787 trigger circuit, and the input pulse prohibition end of the TC787 trigger circuit is connected to the switch.

2. The power device for a computer room of air traffic control equipment according to claim 1, characterized in that: A reset button is provided between the forward ends of the first diode and the second diode and the power supply.

3. The power device for a computer room of air traffic control equipment according to claim 1, characterized in that: The control chip selected is STM32F103CBT6.

4. The power device for a machine room of air traffic control equipment according to claim 1, characterized in that: The DC / DC boost circuit uses a DC / DC boost circuit of model HXN-AP.

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