High-voltage power distribution architecture

Abstract

The utility model discloses a high-voltage power distribution framework, which comprises six high-voltage battery packs and ten motors, the motors are double-winding motors, each motor is connected with two different high-voltage battery packs through a fuse, the two different high-voltage battery packs are connected through a contactor, and the six high-voltage battery packs form annular connection. According to the distribution architecture, through reasonable power distribution and design, the rebalance of the aircraft can reach the optimal solution in a fault state. And meanwhile, the annular circuit is adopted, so that the safety of the aircraft is greatly improved. And finally, the cable interconnection weight cost paid by the architecture is minimum.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation equipment, and in particular to a high-voltage power distribution architecture. Background Art

[0002] In electric aircraft, power distribution plays an important role. For multi-redundancy power supply systems, timely switching of power sources is an important guarantee for ensuring the normal power supply of the aircraft. At present, power distribution, grid protection and load control of the power supply system are mainly achieved through different electrical components and power buses with different loads. The high-voltage power distribution architecture mainly includes centralized power supply and distributed power supply. However, centralized power supply cannot meet the high reliability requirements, and the energy provided by distributed power supply is too low. Once a failure occurs, a large amount of energy needs to be abandoned, which is too wasteful. Utility Model Content

[0003] The purpose of the present invention is to provide a high-voltage power distribution architecture to solve the problems mentioned in the background technology. To achieve the above purpose, the present invention provides the following technical solutions: a high-voltage power distribution architecture, including 6 high-voltage battery packs and 10 motors, the motors are dual-winding motors, each of the motors is connected to two different high-voltage battery packs through a fuse, and the two different high-voltage battery packs are connected through a contactor, and the 6 high-voltage battery packs form a ring connection.

[0004] Preferably, the high-voltage battery pack is connected to a DC converter and a charging port, and a fuse is connected between the high-voltage battery pack and the DC converter.

[0005] Preferably, the contactor is a normally closed contactor.

[0006] Preferably, the motors include 8 propeller-lifting motors and 2 tail-thrusting motors.

[0007] Preferably, the fuse and contactor are both installed in a high-voltage switchboard.

[0008] Technical effects and advantages of the utility model: Through reasonable power distribution and design, the distribution architecture can achieve the optimal solution for aircraft rebalancing in the event of a fault. At the same time, the use of a ring circuit greatly improves the safety of the aircraft. Finally, the weight cost of the cable interconnection paid by this architecture is minimal. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A connection circuit diagram of an embodiment;

[0010] Figure 2 A schematic diagram of the connection of the components in the embodiment;

[0011] Figure 3 A schematic diagram of a high-voltage battery pack failure in an embodiment;

[0012] Figure 4 Schematic diagram of a motor failure in an embodiment. DETAILED DESCRIPTION

[0013] In order to make the technical means for realizing the utility model, creative features, objectives and effects easy to understand, the utility model is further explained below in conjunction with specific diagrams. In the description of the utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection or a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two components.

[0014] Example

[0015] like Figure 1-Figure 4 As shown, a high-voltage power distribution architecture includes 6 high-voltage battery packs and 10 motors, wherein the motors are dual-winding motors, which are used to provide lift and thrust for the aircraft. Figure 2-4 The middle position indicates its relative position on the aircraft. The 10 motors are numbered MOTOR1 to MOTOR10, among which MOTOR1 to MOTOR8 are propeller lift motors, and MOTOR9 and MOTOR10 are tail thrust motors. The high-voltage battery packs are numbered HBATT1 to HBATT6 to provide high-voltage power for the aircraft. The high-voltage battery packs are connected to the DC converter and the charging port. A fuse is connected between the high-voltage battery pack and the DC converter. The DC converter and the charging port are represented by DCDC and CHARGER respectively in the figure. The DC converter is used to convert high-voltage DC power into low-voltage DC power, and the charging port is used to charge the high-voltage battery. The motors are connected to two different high-voltage battery packs through fuses, and the two different high-voltage battery packs are connected through normally closed contactors. The six high-voltage battery packs form a ring connection, and the fuses and normally closed contactors are installed in the high-voltage distribution board. Figure 1-Figure 4The medium fuses are represented by F11, F12, F21, F22, F31, F32, F41, F42, F51, F52, F61, F62, F71, F72, F81, F82, F91, F92, F101, F102, F111, and F112; the normally closed contactors are represented by S1 to S6; MOTOR1 is connected to HBATT1 and HBATT2 through F11 and F12; MOTOR2 is connected to HBATT3 and HBATT5 through F21 and F22; MOTOR3 is connected to HBATT4 and HBATT5 through F31 and F32; MOTOR4 is connected to HBATT4 and HBATT6 through F41 and F42; MOTOR5 is connected to HBATT1 and HBATT2 through F51 and F52; MOTOR6 is connected to HBATT1 through F61 and F62 TT5 and HBATT3; MOTOR7 is connected to HBATT4 and HBATT5 through F71 and F72; MOTOR8 is connected to HBATT2 and HBATT6 through F81 and F82; MOTOR9 is connected to HBATT3 and HBATT1 through F91 and F92; MOTOR10 is connected to HBATT4 and HBATT6 through F101 and F102; MOTOR1 is connected to HBATT1 and HBATT2 through F11 and F12; the DC converters are represented by DCDC1 and DCDC2 respectively, and the charging ports are represented by CHARGER1 and CHARGER2, CHARGER1 is connected to HBATT3, and CHARGER2 is connected to HBATT6; DCDC1 is connected to HBATT5 through F111; DCDC2 is connected to HBATT2 through F112.

[0016] The basic function of this architecture is that 6 high-voltage battery packs are connected in a ring to power 10 motors. When a short circuit occurs in the power supply line of the motor, the fuse on each motor circuit will blow, cutting off the short-circuited branch and protecting the entire power grid.

[0017] The following describes the changes in the high-voltage power distribution under this architecture in the event of a fault. Figure 1 Simplify the content Figure 2 , the topological connection relationship between the two graphs is exactly the same.

[0018] When one of the six high-voltage battery packs fails, the normally closed contactor adjacent to it detects the fault and disconnects it. Since the six high-voltage battery packs are designed in a ring shape, each high-voltage battery pack has two outputs entering the power grid. When any high-voltage battery pack fails, it can be cut off from the power grid, and the remaining five high-voltage battery packs remain connected and work normally, and the motor connected to the faulty battery stops working. Other motors need to redistribute the power of the motors according to the situation. Since the motors that stop rotating are symmetrically distributed relative to the aircraft, this is conducive to other motors to rebalance the aircraft attitude. For 6 groups of motors with different power sources, this architecture stops the motors in the symmetrical position of the aircraft after the high-voltage battery pack fails. Therefore, after any high-voltage battery pack fails, this architecture is the most beneficial for the motors that rebalance the aircraft. In addition, after any high-voltage battery pack fails, the number of motors that stop working completely is less than 1, and at most a single winding of 4 motors stops working. That is, when the high-voltage battery pack fails, at most four motors enter the half-power operation state, and there will not be a state where a motor stops completely. This is also conducive to rebalancing the aircraft. Such as Figure 3 For example, when HBATT2 fails, the S5 and S1 switches detect the fault and disconnect. The loads MOTOR1, MOTOR5, MOTOR4, MOTOR8 and DCDC2 on them all stop working. The positions of MOTOR1, MOTOR5 and MOTOR4, MOTOR8 on the aircraft are symmetrical. The other high-voltage battery packs are connected to each other. The other motors redistribute power to keep the aircraft stable.

[0019] When a motor fails, one winding stops working. At this time, the power of the motor decreases, and the power of the other winding of the motor increases to maintain the power. At this time, for this architecture, the power supply will not be affected. For the tail thrust motor, since the four power supplies of the MOTOR9 and MOTOR10 dual-winding motors are all from different high-voltage battery packs. Therefore, when one tail thrust power supply fails, the tail thrust power only decreases by a quarter, which is most beneficial to the flight of the aircraft. Figure 4 For example, when one winding of motor MOTOR1 stops working, the other winding will increase the power to keep the aircraft balanced.

[0020] In this architecture, fuses and normally closed contactors are installed in the high-voltage distribution board, and there are only two sets of interconnection cables connecting the left and right high-voltage distribution boards. This reduces the burden of interconnection cables to the greatest extent. This is also the minimum number of interconnection cable sets between the left and right high-voltage distribution boards under this architecture.

[0021] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-voltage power distribution architecture, comprising 6 high-voltage battery packs and 10 motors, characterized in that: The motor is a dual-winding motor, each of which is connected to two different high-voltage battery packs via a fuse, and the two different high-voltage battery packs are connected via a contactor, so that the six high-voltage battery packs form a ring connection.

2. A high voltage power distribution architecture according to claim 1, characterized in that: The high-voltage battery pack is connected to the DC converter and the charging port, and a fuse is connected between the high-voltage battery pack and the DC converter.

3. The high voltage power distribution architecture according to claim 1, characterized in that: The contactor is a normally closed contactor.

4. The high voltage power distribution architecture according to claim 1, characterized in that: The motors include 8 propeller-lifting motors and 2 tail-thrusting motors.

5. The high voltage power distribution architecture according to claim 1, characterized in that: The fuse and contactor are both installed in the high-voltage distribution board.

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