CN202481323U - 36V alternating current power supply system of airplane - Google Patents

Abstract

The utility model belongs to the field of aviation electrics, in particular to an improvement of an aircraft 36V AC power supply system. Redesign the line according to the interface definition of the SL-1000E static converter, cancel the transfer box ZJH-3, use the fault output signal of the main static converter to start the backup static converter, and use the main static converter to output normally The signal locks the output contactor to ensure the reliable power supply of the line. Compared with the prior art, the utility model cancels the transfer box ZJH-3, uses the fault output signal of the SL-1000E main static converter to start the SL-1000E standby static converter, and utilizes the normal output signal of the main static converter Lock the output contactor to ensure the reliable power supply of the line, simplify the wiring of the switch and the indicator light, the line is simple, the reliability is high, and the weight is light.

Description

An Aircraft 36V AC Power Supply System

technical field

The utility model belongs to the field of aviation electrics, in particular to an improvement of an aircraft 36V AC power supply system.

Background technique

For a long time, the 36V AC power supply of aircraft has been supplied by two rotary three-phase converters SBL-1000. As shown in Figure 1, there are two SBL-1000s in the whole machine, one is active and the other is standby. The main and standby converters SBL-1000 work together with the transfer box ZJH-3. When the AC end is short-circuited or disconnected between phases; when the DC end is short-circuited or disconnected, the transfer box ZJH-3 automatically disconnects the main converter circuit and connects the backup converter. The rotary three-phase converter SBL-1000 is heavy and noisy, and in order to realize the automatic conversion of main and standby, it must be equipped with a transfer box ZJH-3, which is complicated in line connection and low in reliability.

Contents of the invention

The technical problem to be solved by the utility model: the utility model provides a new type of aircraft 36V AC power supply system, which cancels the transfer box ZJH-3, the conversion circuit is simple, and the reliability is high.

Technical solution of the present utility model: In order to solve the above technical problems, the utility model is realized through the following technical solutions: redesign the circuit according to the interface definition of SL-1000E, cancel the transfer box ZJH-3, and use the main static transformer The fault output signal starts the standby static converter, and the output contactor is locked by using the normal output signal of the main static converter to ensure reliable power supply of the line, specifically:

A 36V AC power supply system for aircraft, consisting of 36V AC power distribution box 1, filter capacitor 2, contactor 3, SL-1000E main static converter 4, SL-1000E backup static converter 5, 28V power bus bar 6. Composed of fuse 7, standby static converter working indicator light 8 and switch 9, the three-phase bus bar in 36V AC power distribution box 1 passes filter capacitor 2 and 3 groups of normally open and normally closed contacts of contactor 3 Connect respectively, the A, B, and C holes of the 4 plugs of the SL-1000E main static converter are respectively connected with the 3 sets of normally open contacts of the contactor 3, and the A, B, and C holes of the 5 plugs of the SL-1000E standby static converter C holes are respectively connected to 3 sets of normally closed contacts of contactor 3, 1 point of switch 9 is connected to 28V power bus bar 6 through fuse 7, 2 points of switch 9 are connected to SL-1000E main static converter 4 plug The 1-hole connection of the switch 9 is connected to the 1-hole of the SL-1000E standby static converter 5 plug, and the 28V power bus bar 6 is respectively connected to the SL-1000E main static converter 4 and SL-1000E through the fuse 7. The positive terminal of 1000E standby static converter 5 is connected, the negative terminal of SL-1000E main static converter 4 and SL-1000E standby static converter 5 is connected to the body, and the main static converter of SL-1000E 4 holes of plug 4 are connected to point A of the coil of contactor 3, and point B of coil of contactor 3 is connected to the body, and 4 holes of SL-1000E standby static converter 5 plug are connected to the positive terminal of working indicator light 8 of the spare static converter Connect, the negative terminal of the standby static converter working indicator light 8 is connected to the body.

The definition of the two SL-1000E static converter plugs is as follows: when the 1-hole and 2-hole input 28V power, the starting static converter SL-1000E starts to work, the 3-hole outputs a faulty 28V signal, and the 4-hole outputs a normal working 28V Signal, the A, B, and C holes of the plug are three-phase 36V AC power output, the positive terminal is connected to the 28V input power supply, and the negative terminal is connected to the body.

Beneficial effects of the utility model: Compared with the prior art, the utility model cancels the transfer box ZJH-3, uses the fault output signal of the SL-1000E main static converter to start the SL-1000E standby static converter, and uses the main The normal output signal of the static transformer is used to lock the output contactor to ensure the reliable power supply of the line, simplify the wiring of the switch and the indicator light, the line is simple, the reliability is high, and the weight is light.

Description of drawings

Fig. 1 is the circuit diagram of prior art 36V AC power supply system;

Fig. 2 is the circuit diagram of the utility model system.

Among them, 1-36V AC power distribution box, 2-filter capacitor, 3-contactor, 4-SL-1000E main static converter, 5-SL-1000E backup static converter, 6-28V power bus bar, 7-fuse, 8-standby static converter working indicator light, 9-switch.

Detailed ways

The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments: the 28V power supply bus bar 6 supplies power to the SL-1000E main static converter 4 and the SL-1000E standby static converter 5 through the fuse 7, and the switch 9 Control the working status of SL-1000E main static converter 4 and SL-1000E standby static converter 5. When the switch 9 is turned to the main or standby position, the 28V power bus bar 6 reaches hole 1 of the SL-1000E main static converter 4 or SL-1000E standby static converter 5 through the fuse 7 and then through the switch 9 , starting corresponding to the static converter put into work. When the switch 9 is turned to the main position, after the SL-1000E main static converter 4 works, the three-phase 36V AC power is output through the A, B and C holes of the SL-1000E main static converter 4 plug, and at the same time The 4 holes of the plug output the normal working 28V signal, which controls the electrification of the coil of the contactor 3, so that the normally open contact is closed, and the main static converter 4 of SL-1000E is connected to the 36V AC through the contactor 3 and the filter capacitor 2. Electric box 1 supplies power. When the main static converter 4 of SL-1000E fails, the faulty 28V signal is output at the 3rd hole of the plug, and the signal passes through the 2nd hole of the SL-1000E standby static converter 5 to start the SL-1000E standby static converter 5 At the same time, there is no 28V normal output signal in the plug 4 hole of the SL-1000E main static converter 4, the coil of the contactor 3 is powered off, and the SL-1000E backup static converter 5 passes through the normally open contact of the contactor 3 and filters The capacitor 2 supplies power to the 36V AC power distribution box 1, and at the same time, the SL-1000E standby static converter 5 outputs a normal working 28V signal at the 4th hole of the plug, and lights up the standby static converter working indicator light 8 .

The utility model cancels the transfer box ZJH-3, uses the fault output signal of the SL-1000E main static converter to start the SL-1000E standby static converter, uses the normal output signal of the main static converter to lock the output contactor, and ensures the line Reliable power supply simplifies the wiring of switches and indicators, simple wiring, high reliability and light weight.

Claims (1)

1. A 36V AC power supply system for an aircraft, characterized in that it consists of a 36V AC power distribution box [1], a filter capacitor [2], a contactor [3], SL-1000E main static converter [4], SL-1000E standby static converter [5], 28V power bus bar [6], fuse [7], standby static converter working indicator light [8] and switch [9], 36V AC power distribution box [ The three-phase bus bar in 1] is respectively connected to the 3 groups of normally open and normally closed contacts of the contactor [3] through the filter capacitor [2], and the A and B of the plugs of the main static converter [4] of the SL-1000E , C holes are respectively connected with 3 groups of normally open contacts of the contactor [3], A, B, C holes of the SL-1000E spare static converter [5] plug are respectively connected with 3 groups of normally closed contacts of the contactor [3] Contact connection, 1 point of switch [9] is connected to 28V power bus bar [6] through fuse [7], 2 points of switch [9] are connected to 1 point of SL-1000E main static converter [4] plug The 3 points of the switch [9] are connected to the 1 hole of the plug of the SL-1000E standby static converter [5], and the 28V power bus bar [6] is respectively connected to the main static converter of the SL-1000E through the fuse [7]. Converter [4] and SL-1000E backup static converter [5] positive terminal connection, SL-1000E main static converter [4] and SL-1000E backup static converter [5] negative connection The column is connected with the body, the 4 holes of the plug of the SL-1000E main static converter [4] are connected with the coil A point of the contactor [3], the coil B of the contactor [3] is connected with the body, and the SL-1000E standby static 4 holes of the converter [5] plug are connected with the positive end of the standby static converter working indicator light [8], and the negative terminal of the standby static converter working indicator light [8] is connected to the body.

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