Pre-charging circuit of aviation power distribution system

Abstract

The utility model relates to the field of aviation power distribution system power supply, in particular to a pre-charging circuit of an aviation power distribution system, which enhances the reliability of contactor type switching devices in the on-off switching process in a power supply control circuit, and is characterized in that a 1000V bus bar + is connected with a main push 1 + through a main push 1 + contactor, and is connected with a main push 2 + through a main push 2 + contactor; the 1000V bus bar is connected with the main push 1-through the main push 1-contactor, the 1000V bus bar is connected with the main push 2-through the main push 2-contactor, and the power supply of the main push 1 and the main push 2 is realized through the 1000V bus bar + and the 1000V bus bar-; the pre-charging 1 contactor, a first anti-reverse diode and a first pre-charging resistor are connected in parallel at two ends of a main contact of the main push 1 + contactor; and the pre-charging 1 contactor, a second anti-reverse diode and a second pre-charging resistor are connected in parallel at the two ends of the main contact of the main push 2 + contactor. The utility model is suitable for the aviation power distribution system power supply field.

Description

Technical Field

[0001] This utility model relates to the field of power supply for aviation power distribution systems, specifically to a pre-charging circuit for aviation power distribution systems. Background Technology

[0002] With the continuous development of aviation technology, the power supply and distribution technology of aviation power distribution systems is becoming increasingly important. The reliability of power supply control circuits such as contactors directly affects the safety and reliability of aircraft.

[0003] In summary, an aviation power distribution system pre-charging circuit is needed in the aircraft's power distribution system. Utility Model Content

[0004] The purpose of this invention is to provide a pre-charging circuit for an aviation power distribution system, which enhances the reliability of contactor-type switching devices in the switching process of the power supply control circuit, thereby achieving safe and reasonable power distribution.

[0005] The technical solution of this utility model:

[0006] A pre-charging circuit for an aviation power distribution system,

[0007] The 1000V busbar+ is connected to the main pusher 1+ via the main pusher 1+ contactor, and the 1000V busbar+ is connected to the main pusher 2+ via the main pusher 2+ contactor; the 1000V busbar- is connected to the main pusher 1- via the main pusher 1- contactor, and the 1000V busbar- is connected to the main pusher 2- via the main pusher 2- contactor. The 1000V busbar+ and 1000V busbar- provide power to the main pusher 1 and main pusher 2; the precharge 1 contactor is connected in parallel with the first anti-reverse diode and the first precharge resistor across the main contacts of the main pusher 1+ contactor; the precharge 1 contactor is connected in parallel with the second anti-reverse diode and the second precharge resistor across the main contacts of the main pusher 2+ contactor.

[0008] For the main 1+ contactor, main 1- contactor, main 2+ contactor, and main 2- contactor, select the JHX241UAA contactor. The JHX241UAA contactor has a main contact rated voltage of 1500V and a main contact rated current of 350A.

[0009] The main push 1+ contactor and the main push 1- contactor are controlled together, and the main push 2+ contactor and the main push 2- contactor are controlled together. The control signals for the main push 1+ contactor, the main push 1- contactor 1, the main push 2+ contactor, and the main push 2- contactor are all provided by external equipment.

[0010] The first and second anti-reverse diodes are model 2CZ102S. The 2CZ102S diode has a reverse non-repeating peak voltage of 2300V, a reverse working peak voltage of 2000V, an average rectified output current of 0.5A, and a forward non-repeating surge current of 10A.

[0011] The first and second pre-charge resistors have a resistance of 8000Ω, a power of 50W, a withstand voltage of 3000VDC, and a leakage current of no more than 0.1mA.

[0012] Precharge contactor 1 and precharge contactor 2 are controlled together to form a precharge circuit. The control signals for precharge contactor 1 and precharge contactor 2 are provided by external equipment.

[0013] The beneficial effects of this utility model are as follows: This utility model prevents the load from having a large instantaneous current during startup by using a pre-charging circuit. The resistor in the pre-charging circuit can limit the current, and the diode module in the pre-charging circuit can prevent backflow of power. By supplying power to the load through the pre-charging circuit, it can ensure that the main circuit can start safely at the moment of connection, realize the rational power supply of the aviation power distribution system, and improve the safety and reliability of the power distribution network. Attached Figure Description

[0014] Figure 1 A schematic diagram of a pre-charging circuit for an aviation power distribution system. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides a pre-charging circuit for an aviation power distribution system, such as... Figure 1 As shown, the 1000V busbar + is connected to main pusher 1+ and main pusher 2+ via main pusher 1 positive contactor and main pusher 2 positive contactor respectively. The 1000V busbar - is connected to main pusher 1- and main pusher 2- via main pusher 1 negative contactor and main pusher 2 negative contactor respectively. The 1000V busbar + and 1000V busbar - provide power to main pusher 1 and main pusher 2. The precharge contactor 1, the reverse protection diode, and the precharge resistor are connected in parallel across the main contacts of main pusher 1 positive contactor and main pusher 2 positive contactor. The precharge contactor 2 is connected in parallel across the main contacts of main pusher 1 negative contactor and main pusher 2 negative contactor.

[0017] The 1000V busbar+ and 1000V busbar- supply power to the load main push 1 and main push 2 via JHX241UAA contactors. The rated voltage of the main contacts of the JHX241UAA contactor is 1500V and the rated current of the main contacts is 350A.

[0018] Main pusher 1 positive contactor and main pusher 1 negative contactor are controlled together, and main pusher 2 positive contactor and main pusher 2 negative contactor are controlled together.

[0019] The pre-charging circuit charges the downstream load equipment. The pre-charging circuit contactor is model JGXA21DA, with a rated main contact voltage of 1000V and a rated main contact current of 100A. A diode is added to the pre-charging circuit to prevent reverse current from the 1000V power supply. The pre-charging circuit diode is model 2CZ102S, with a reverse non-repeating peak voltage of 2300V, a reverse working peak voltage of 2000V, an average rectified output current of 0.5A, and a forward non-repeating surge current of 10A. A resistor is added to the pre-charging circuit to limit current. The resistor has a resistance of 8000Ω, a power of 50W, a withstand voltage of 3000VDC, and a leakage current of no more than 0.1mA.

[0020] Precharge contactor 1 and precharge contactor 2 are controlled together to form a precharge circuit. The control signals for precharge contactor 1 and precharge contactor 2 are provided by external equipment.

[0021] The above description is merely a specific embodiment of this utility model, providing a detailed description of the utility model. Parts not covered in detail are conventional techniques. However, the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An aviation power distribution system pre-charge circuit, characterized in that, 1000V bus bar + is connected with main push 1+ through main push 1+ contactor, 1000V bus bar + is connected with main push 2+ through main push 2+ contactor; 1000V bus bar - is connected with main push 1- through main push 1- contactor, 1000V bus bar - is connected with main push 2- through main push 2- contactor, and power supply for main push 1 and main push 2 is realized through 1000V bus bar + and 1000V bus bar -; pre-charge 1 contactor is connected in parallel with first anti-reverse diode and first pre-charge resistor at both ends of main push 1+ contactor main contact; pre-charge 1 contactor is connected in parallel with second anti-reverse diode and second pre-charge resistor at both ends of main push 2+ contactor main contact.

2. The aviation power distribution system pre-charge circuit of claim 1, characterized in that, main push 1+ contactor, main push 1- contactor, main push 2+ contactor and main push 2- contactor are JHX241UAA contactors, and the main contactors of JHX241UAA contactors have a rated voltage of 1500V and a rated current of 350A.

3. The aviation power distribution system pre-charge circuit of claim 1, characterized in that, main push 1+ contactor and main push 1- contactor are controlled together, main push 2+ contactor and main push 2- contactor are controlled together, and the control signals of main push 1+ contactor, main push 1- contactor, main push 2+ contactor and main push 2- contactor are provided by external equipment.

4. The aviation power distribution system pre-charge circuit of claim 1, characterized in that, the first anti-reverse diode and the second anti-reverse diode are 2CZ102S, and the 2CZ102S diode has a non-repetitive peak reverse voltage of 2300V, a peak reverse voltage of 2000V, a rectified output average current of 0.5A and a non-repetitive surge current of 10A.

5. The aviation power distribution system pre-charge circuit of claim 1, characterized in that, the first pre-charge resistor and the second pre-charge resistor have a resistance of 8000Ω, a power of 50W and a withstand voltage of 3000VDC, and a leakage current of not more than 0.1mA.

6. The aviation power distribution system pre-charge circuit of claim 1, characterized in that, pre-charge 1 contactor and pre-charge 2 contactor are controlled together to form a pre-charge circuit, and the control signals of pre-charge 1 contactor and pre-charge 2 contactor are provided by external equipment.

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