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Smart Solid Low Voltage DC Electrical Junction Box

An electrical junction box, low-voltage direct current technology, applied in the direction of electrical components, conductive connections, connections, etc.

Inactive Publication Date: 2018-12-07
刘复民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Because it has no mechanical and electrical connection mechanism and no metal fuse, it completely overcomes the shortcomings of the existing metal fuse fuse. Compared with the existing DC electrical junction box, it can also save a consumable control switch or relay.

Method used

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  • Smart Solid Low Voltage DC Electrical Junction Box
  • Smart Solid Low Voltage DC Electrical Junction Box
  • Smart Solid Low Voltage DC Electrical Junction Box

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0048] The specific circuit implementation mode 1 is a positive voltage control output type solid junction box, figure 1 is the circuit diagram of one of the branches; figure 2 It is the internal circuit diagram of the power supply regulator 29 of one of the branch MOS transistors 1 driving the IC26 in the positive voltage control output type electrical junction box; image 3 It is a circuit wiring schematic diagram of using one CPU 19 to control the positive voltage control output of 4 branches; the CPU 19 adopts Hongjing STC15F2K series or other single-chip microcomputers that meet the functional requirements.

[0049] In this embodiment, the main switching power element of each power supply branch adopts N-channel MOS transistor 1, and each branch N-channel MOS transistor can be one, or multiple can be connected in parallel as a power supply output branch. The drains of the main switch N-channel MOS transistors 1 of all solid junction boxes are connected to the positive e...

specific Embodiment approach 2

[0063] The specific circuit implementation mode 2 is a negative voltage control output type solid junction box, Image 6 is the circuit diagram of one of the branches, Figure 4 It is a circuit wiring schematic diagram of using 1 CPU 19 to control 4 branch negative voltage control outputs.

[0064] Only the differences from the circuit hardware embodiment 1 will be described below

[0065] Image 6 Among them, the sampling resistance of the output current is still replaced by the channel resistance when the main switch N-channel MOS transistor of this branch is turned on, and the current sampling signal of the current sampling point 33 is sent to the non-inverting input terminal of the amplifier 4 through the current limiting resistance 37, and the current The inverting input terminal of the sampling signal amplifier 4 is connected in series with the compensation thermistor 3 through the resistor 2 and then grounded; the common ground terminal of all amplification, compariso...

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Abstract

The invention relates to an intelligent solid low-voltage direct-current electric junction box. According to the intelligent solid low-voltage direct-current electric junction box, solid electronic switches are adopted to replace built-in fuses, relays and switches, so that safe power utilization and control of output branch circuits in a multi-output branch circuit low-voltage direct-current electrical junction box can be realized. The current of the branch circuits in the junction box is inputted into an amplifier in a sampled manner, and then, is subjected to simulation and CPU digital processing; each branch circuit realizes short-circuit protection, large-current protection and long-delay inverse time limit protection; and current display, correction and fault current memorization of each branch circuit are realized. With a proper assembly structure adopted, connection resistance can be decreased, and large current and weak signal isolation can be realized; and multi-output mutual interference and operational instability can be avoided. The intelligent solid low-voltage direct-current electric junction box is free of defects of fuses, can be made into a solid sealed structure, and can work in harsh environments. A built-in CPU of the intelligent solid low-voltage direct-current electric junction box can realize automatic recovery, far and near-distance data transmission and monitoring.

Description

technical field [0001] The invention relates to a DC electrical junction box with low-voltage DC input, multi-branch low-voltage DC power supply output, and protection fuses, control relays or switches for each output branch used in automobiles or other special vehicles, ships, special machinery, and special occasions. (DC fuse box), especially the intelligent solid low voltage DC electrical junction box. (Hereinafter referred to as solid junction box in this manual) Background technique [0002] In the existing DC electrical junction box, a fuse is used to provide current protection during the power supply process of each power supply branch. It is a metal fuse that is melted at high temperature by the electrothermal effect at high current, because it uses a mechanical mechanism to complete the electrical connection. In the long-term use process, the elastic fatigue and oxidation of the electrical connection metal materials will increase the resistance of the connection po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R13/66H01R13/70H01R9/24
Inventor 刘复民
Owner 刘复民
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