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Auxilitary power supply

A technology of auxiliary power supply and resistance, applied in electrical components, circuit devices, adjusting electrical variables, etc., can solve the problem that the auxiliary power supply is difficult to adapt to the working environment, and achieve the effect of improving reliability, simple method and improving lightning protection.

Inactive Publication Date: 2002-10-30
EMERSON NETWORK POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing auxiliary power supply is difficult to adapt to this working environment

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1: Combining figure 1 and figure 2 , an auxiliary power supply, including a first-level surge suppression network, a step-down circuit, a rectifier circuit, a second-level surge suppression network and a voltage regulator circuit, and a first-level surge is connected between the grid voltage (ACL1, ACN1) and the step-down circuit. Surge suppression network, the first-level surge suppression network consists of a series resistor R18, an inductor L1 and a varistor RV1 connected in parallel between the differential modes. The step-down circuit adopts a step-down capacitor C1, and the rectifier circuit is a rectifier bridge B. The rectifier bridge A secondary surge suppression network is connected between B and the voltage regulator circuit. The secondary surge suppression network consists of a series resistor R19, an inductance L2 and a varistor RV2 connected in parallel between the differential modes. The voltage regulator circuit adopts anti-surge. Powerful tra...

Embodiment 2

[0021] Embodiment 2: as image 3 As shown, it is the specific realization circuit of another auxiliary power supply, image 3 In addition to the secondary surge suppression network using the anti-surge shock resistor R19, the voltage regulator circuit uses another method, which is composed of resistor R14, voltage regulator tube D11 and transistor Q5 in parallel at both ends of TVS tube D12. The linear voltage stabilizing circuit of the 3-pole transistor can further improve the lightning protection capability by adding a level of protection with a TVS tube in front of the triode voltage stabilizing circuit. Other structures and working processes are the same as those in the first embodiment (omitted).

Embodiment 3

[0022] Example three: as Figure 4 Shown is another specific implementation circuit of auxiliary power supply. In the figure, in addition to the second-level surge suppression network composed of anti-surge impulse resistor R19 and inductor L2 in series between the rectifier circuit and the voltage regulator circuit, Other structures and working processes are the same as those in the second embodiment (omitted).

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Abstract

The invention relates to an assistant power source that includes the first stage of surge restrain network, the reduction voltage circuit, the rectifying circuit, the second stage of surge restrain network and the voltage regulation circuit. With being passed the first stage of surge restrain network, which restrain the surge and the lightning strike as well as large current impulsion, the voltage of the power network is connected to the rectifying circuit through the reduction voltage circuit. With remnant energy being restrained by the second stage of surge restrain network, the output of the rectifying circuit is connected to the voltage regulation circuit, whose output is the working voltage. The first and second stages of surge restrain network can adopts following technical measures: adding a resistance or reactor against surge in series, or voltage dependent resistor in parallel, or their combination.

Description

technical field [0001] The invention relates to a communication power supply, which is mainly used as an auxiliary power supply in the grid input overvoltage and undervoltage isolation circuit of a communication power supply module, and can also be used as an auxiliary power supply for other circuits. Background technique [0002] Due to the harsh operating environment of the communication power supply of the base station, the voltage fluctuation of the power grid is very large, and the performance of the auxiliary power supply that provides the reference voltage and the working power supply for the communication power supply of the base station is demanding, especially the surge, lightning strike, and large current impact must be strongly suppressed. ability. The existing auxiliary power supply is difficult to adapt to this working environment. It is one of the main reasons for the failure of input electrolytic capacitors. SUMMARY OF THE INVENTION [0003] The purpose o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/46H02H9/02H02H9/04
Inventor 杨学峰曹升芳
Owner EMERSON NETWORK POWER CO LTD
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