EVTOL competitive power supply system capable of avoiding loss of external low-voltage power supply

Abstract

The utility model provides an EVTOL competitive power supply system capable of avoiding loss of external low-voltage power supply, which comprises a relay power supply module and a flyback conversion module, an internal battery pack of an aircraft is subjected to voltage reduction through the flyback conversion module and then is output from an internal battery pack voltage reduction output port on the flyback conversion module; and the internal battery pack voltage reduction output port and the external low-voltage power supply module are simultaneously connected with the relay power supply module. According to the utility model, the power supply of the controller adopts a dual-redundancy power supply mode of the internal battery pack and the external low-voltage power supply module, and the internal battery pack and the external low-voltage power supply module form a competitive power supply relationship through the relay power supply module; the controller is continuously powered by the internal battery pack, so that the aircraft is prevented from being out of control due to power failure of the controller, and aircraft accidents are reduced.

Description

Technical Field

[0001] The utility model relates to the field of energy technology, and in particular to an EVTOL competitive power supply system for avoiding loss of external low-voltage power supply. Background Art

[0002] For the EVTOL (electric vertical take-off and landing) controller field, the low-voltage power supply is the power source of the entire low-voltage controller. In the current EVTOL aircraft design architecture, the power supply of the controller comes entirely from an external low-voltage power supply module. Once the external low-voltage power supply module or power supply harness fails, the entire control system may be paralyzed, causing serious accidents.

[0003] Therefore, it is urgently necessary to provide a power supply system that can ensure the normal operation of the controller after the power supply of the external low-voltage power supply module fails. Summary of the invention

[0004] The purpose of the utility model is to solve the deficiencies in the prior art and provide an EVTOL competitive power supply system that avoids the loss of external low-voltage power supply.

[0005] The purpose of the utility model is achieved through the following technical scheme: an EVTOL competitive power supply system that avoids the loss of external low-voltage power supply, including a relay power supply module and a flyback conversion module. The internal battery pack of the aircraft is stepped down by the flyback conversion module and then output from the internal battery pack step-down output port on the flyback conversion module. The internal battery pack step-down output port is connected to the external low-voltage power supply module and the relay power supply module at the same time.

[0006] Preferably, a diode D6 is provided between the internal battery pack step-down output port and the relay power supply module, and a diode D7 is provided between the external low-voltage power supply module and the relay power supply module.

[0007] Preferably, the output voltage of the internal battery pack step-down output port is 12V, and the voltage of the external low-voltage power supply module is 12V.

[0008] Preferably, the flyback conversion module includes an LT8316 chip and a transformer. The output port of the internal battery pack is connected to a first branch, one end of the first branch is connected to a high-voltage negative electrode, the VIN pin of the LT8316 chip is connected to the first branch, both ends of the primary coil of the transformer are connected to the first branch, one end of the secondary coil of the transformer is connected to the internal battery pack step-down output port, and the other end of the secondary coil of the transformer is grounded; a field effect transistor Q1 is connected to the first branch, and the source and drain of the field effect transistor Q1 are connected to the first branch;

[0009] The BIAS pin of the LT8316 chip is connected to a second branch, one end of the second branch is connected to the high voltage cathode, and the second branch is connected to a resistor R4 and a diode D1;

[0010] The DCM pin of the LT8316 chip is connected to a third branch, one end of the third branch is connected to the second branch; the third branch is connected to a resistor R3 and a capacitor C3;

[0011] A fourth branch is connected to the FB pin of the LT8316 chip, one end of the fourth branch is connected to the first branch and the second branch, the first branch is connected to the second branch, and the second branch is grounded;

[0012] The TC pin of the LT8316 chip is connected to the fourth branch, and a resistor R5 is provided between the TC pin and the fourth branch;

[0013] The GATE pin of the LT8316 chip is connected to the gate of the field effect transistor Q1;

[0014] The SENSE pin of the LT8316 chip is connected to a fifth branch, one end of the fifth branch is connected to a third branch and a fourth branch, the third branch is connected to the first branch, the fourth branch is connected to the high voltage negative electrode, and the third branch is connected to a capacitor C4;

[0015] The GND pin, IR pin, SM pin and VC pin of the LT8316 chip are all connected to the high voltage negative electrode, and a capacitor C2 is provided between the VC pin and the high voltage negative electrode;

[0016] The INTVcc pin and EN pin of the LT8316 chip are connected to the high voltage negative electrode, and a capacitor C1 is provided between the INTVcc pin, the EN pin and the high voltage negative electrode.

[0017] Preferably, a voltage stabilizing diode D5 is provided between the VIN pin of the LT8316 chip and the first branch.

[0018] Preferably, a resistor R6 is connected to the first branch line, and a resistor R7 is connected to the second branch line.

[0019] Preferably, a resistor R10 is connected between the GATE pin of the LT8316 chip and the gate of the field effect transistor Q1.

[0020] Preferably, a capacitor C5 and a capacitor C6 are connected between the secondary coils of the transformer, and the capacitor C5 and the capacitor C6 are connected in parallel.

[0021] Preferably, a Zener diode D2 and a Zener diode D3 are connected to the first branch, the Zener diode D2 and the Zener diode D3 are connected in series, the Zener diode D2 and the Zener diode D3 are located between the two ends of the primary coil of the transformer, and the Zener diode D2 and the Zener diode D3 are connected in reverse.

[0022] Preferably, a voltage stabilizing diode D4 is connected between one end of the secondary coil of the transformer and the buck output port of the internal battery pack.

[0023] The beneficial effect of the present invention is as follows: in the present invention, the power supply of the controller adopts a dual redundant power supply method of an internal battery pack and an external low-voltage power supply module. A competitive power supply relationship is formed between the internal battery pack and the external low-voltage power supply module through a relay power supply module. When the power supply of the external low-voltage power supply module fails, the internal battery pack continues to supply power to the controller, thereby avoiding power failure of the controller and causing loss of control of the aircraft, thereby reducing the occurrence of aircraft accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the power supply framework structure of the utility model.

[0025] Figure 2 This is the circuit diagram of the flyback conversion module. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0027] like Figure 1 As shown, an EVTOL competitive power supply system for avoiding the loss of external low-voltage power supply is characterized in that it includes a relay power supply module and a flyback conversion module. The internal battery pack of the aircraft is stepped down by the flyback conversion module and then output from the internal battery pack step-down output port on the flyback conversion module. The internal battery pack step-down output port is connected to the external low-voltage power supply module and the relay power supply module at the same time. The relay power supply module is connected to the controller of the aircraft, and the controller of the aircraft is powered by the relay power supply module. Under the action of the relay power supply module, the internal battery pack and the external low-voltage power supply module form a competitive power supply relationship.

[0028] The input voltage of the internal battery pack is 600-800V. The main function of the internal battery pack is to provide power for the aircraft, so the voltage is relatively high. After the internal battery pack is stepped down by the flyback conversion module, a low-voltage electricity that can be used for the controller is obtained. The voltage of the low-voltage electricity is 12V, and the low-voltage electricity is output from the internal battery pack step-down output port. The voltage of the external low-voltage power supply module is 12V.

[0029] A diode D6 is provided between the internal battery pack step-down output port and the relay power supply module, and a diode D7 is provided between the external low-voltage power supply module and the relay power supply module. By providing diodes D6 and D7, crosstalk between the internal battery pack and the external low-voltage power supply module can be avoided.

[0030] Among them, the flyback conversion module includes an LT8316 chip and a transformer. The output port of the internal battery pack is connected to a first branch, one end of the first branch is connected to the high-voltage negative electrode, the VIN pin of the LT8316 chip is connected to the first branch, and a voltage regulator diode D5 is provided between the VIN pin of the LT8316 chip and the first branch. The two ends of the primary coil of the transformer are connected to the first branch, one end of the secondary coil of the transformer is connected to the internal battery pack buck output port, and the other end of the secondary coil of the transformer is grounded. A voltage regulator diode D4 is connected between one end of the secondary coil of the transformer and the buck output port of the internal battery pack. Capacitors C5 and C6 are connected between the secondary coils of the transformer, and capacitors C5 and C6 are connected in parallel. The size of capacitor C5 is 141 microfarads, and the size of capacitor C6 is 470 microfarads.

[0031] The first branch is connected with a field effect transistor Q1, and the source and drain of the field effect transistor Q1 are connected to the first branch. The first branch is connected with a voltage regulator diode D2 and a voltage regulator diode D3, which are connected in series, and the voltage regulator diode D2 and the voltage regulator diode D3 are located between the two ends of the primary coil of the transformer, and the voltage regulator diode D2 and the voltage regulator diode D3 are connected in reverse.

[0032] The BIAS pin of the LT8316 chip is connected to a second branch, one end of the second branch is connected to the high voltage negative electrode, and the second branch is connected to a resistor R4 and a diode D1. The resistor R4 is 10KΩ.

[0033] A third branch is connected to the DCM pin of the LT8316 chip, one end of the third branch is connected to the second branch; a resistor R3 and a capacitor C3 are connected to the third branch, and the resistor R3 has a value of 10KΩ.

[0034] The FB pin of the LT8316 chip is connected to a fourth branch, one end of the fourth branch is connected to a first branch and a second branch, the first branch is connected to the second branch, and the second branch is grounded. The first branch is connected to a resistor R6, and the second branch is connected to a resistor R7. The value of the resistor R6 is 44.2KΩ, and the value of the resistor R7 is 4.99KΩ.

[0035] The TC pin of the LT8316 chip is connected to the fourth branch, and a resistor R5 is provided between the TC pin and the fourth branch. The value of the resistor R5 is 121KΩ.

[0036] The GATE pin of the LT8316 chip is connected to the gate of the field effect transistor Q1. A resistor R10 is connected between the GATE pin and the field effect transistor Q1. The value of the resistor R10 is 20Ω.

[0037] The SENSE pin of the LT8316 chip is connected to the fifth branch, one end of the fifth branch is connected to the third branch and the fourth branch, the third branch is connected to the first branch, the fourth branch is connected to the high voltage negative electrode, and the third branch is connected to the capacitor C4. The third branch is connected to the resistor R8. The resistor R8 is 100Ω, and the capacitor C4 is 1 microfarad.

[0038] The GND pin, IR pin, SM pin and VC pin of the LT8316 chip are all connected to the negative high voltage electrode. A capacitor C2 and a resistor R1 are provided between the VC pin and the negative high voltage electrode, and a resistor R2 is connected between the IR pin and the negative high voltage electrode. The capacitor C2 is 4.7 microfarads, and the resistor R1 is 10KΩ.

[0039] The INTVcc pin and EN pin of the LT8316 chip are connected to the high voltage negative electrode, and a capacitor C1 is provided between the INTVcc pin, the EN pin and the high voltage negative electrode. The size of the capacitor C1 is 4.7 microfarads.

[0040] In the utility model, the controller is powered by a dual redundant power supply method of an internal battery pack and an external low-voltage power supply module. A competitive power supply relationship is formed between the internal battery pack and the external low-voltage power supply module through a relay power supply module. When the power supply of the external low-voltage power supply module fails, the internal battery pack continues to supply power to the controller, thereby avoiding power failure of the controller and causing loss of control of the aircraft, thereby reducing the occurrence of aircraft accidents.

[0041] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. An EVTOL competitive power supply system for avoiding loss of external low-voltage power supply, characterized in that: It includes a relay power supply module and a flyback conversion module. The internal battery pack of the aircraft is stepped down by the flyback conversion module and then output from the internal battery pack step-down output port on the flyback conversion module. The internal battery pack step-down output port is connected to the external low-voltage power supply module and the relay power supply module at the same time.

2. The EVTOL competitive power supply system for avoiding loss of external low-voltage power supply according to claim 1, characterized in that: A diode D6 is provided between the internal battery pack step-down output port and the relay power supply module, and a diode D7 is provided between the external low-voltage power supply module and the relay power supply module.

3. The EVTOL competitive power supply system for avoiding external low-voltage power supply loss according to claim 1, characterized in that: The output voltage of the internal battery pack step-down output port is 12V, and the voltage of the external low-voltage power supply module is 12V.

4. The EVTOL competitive power supply system for avoiding external low-voltage power supply loss according to claim 1, characterized in that: The flyback conversion module includes an LT8316 chip and a transformer. The output port of the internal battery pack is connected to a first branch, one end of the first branch is connected to a high-voltage negative electrode, the VIN pin of the LT8316 chip is connected to the first branch, both ends of the primary coil of the transformer are connected to the first branch, one end of the secondary coil of the transformer is connected to the internal battery pack step-down output port, and the other end of the secondary coil of the transformer is grounded; a field effect transistor Q1 is connected to the first branch, and the source and drain of the field effect transistor Q1 are connected to the first branch; The BIAS pin of the LT8316 chip is connected to a second branch, one end of the second branch is connected to the high voltage cathode, and the second branch is connected to a resistor R4 and a diode D1; The DCM pin of the LT8316 chip is connected to a third branch, one end of the third branch is connected to the second branch; the third branch is connected to a resistor R3 and a capacitor C3; A fourth branch is connected to the FB pin of the LT8316 chip, one end of the fourth branch is connected to the first branch and the second branch, the first branch is connected to the second branch, and the second branch is grounded; The TC pin of the LT8316 chip is connected to the fourth branch, and a resistor R5 is provided between the TC pin and the fourth branch; The GATE pin of the LT8316 chip is connected to the gate of the field effect transistor Q1; The SENSE pin of the LT8316 chip is connected to a fifth branch, one end of the fifth branch is connected to a third branch and a fourth branch, the third branch is connected to the first branch, the fourth branch is connected to the high voltage negative electrode, and the third branch is connected to a capacitor C4; The GND pin, IR pin, SM pin and VC pin of the LT8316 chip are all connected to the high voltage negative electrode, and a capacitor C2 is provided between the VC pin and the high voltage negative electrode; The INTVcc pin and EN pin of the LT8316 chip are connected to the high voltage negative electrode, and a capacitor C1 is provided between the INTVcc pin, the EN pin and the high voltage negative electrode.

5. The EVTOL competitive power supply system for avoiding loss of external low-voltage power supply according to claim 4, characterized in that: A voltage stabilizing diode D5 is provided between the VIN pin of the LT8316 chip and the first branch.

6. The EVTOL competitive power supply system for avoiding loss of external low-voltage power supply according to claim 4, characterized in that: The first branch is connected to a resistor R6, and the second branch is connected to a resistor R7.

7. The EVTOL competitive power supply system for avoiding loss of external low-voltage power supply according to claim 4, characterized in that: A resistor R10 is connected between the GATE pin of the LT8316 chip and the gate of the field effect transistor Q1.

8. The EVTOL competitive power supply system for avoiding external low-voltage power supply loss according to claim 4, characterized in that: A capacitor C5 and a capacitor C6 are connected between the secondary coils of the transformer, and the capacitor C5 and the capacitor C6 are connected in parallel.

9. The EVTOL competitive power supply system for avoiding loss of external low-voltage power supply according to claim 4, characterized in that: The first branch is connected with a Zener diode D2 and a Zener diode D3, which are connected in series and are located between the two ends of the primary coil of the transformer. The Zener diode D2 and the Zener diode D3 are connected in reverse.

10. The EVTOL competitive power supply system for avoiding loss of external low-voltage power supply according to claim 4, characterized in that: A voltage stabilizing diode D4 is connected between one end of the secondary coil of the transformer and the step-down output port of the internal battery pack.

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