CN201733238U

CN201733238U - Auxiliary power system

Info

Publication number: CN201733238U
Application number: CN2010202206932U
Authority: CN
Inventors: 秦岭; 陈恒留; 吴建峰
Original assignee: SHENZHEN JINGFUYUAN TECH Co Ltd
Current assignee: SHENZHEN JINGFUYUAN TECHNOLOGY CO., LTD.
Priority date: 2010-06-09
Filing date: 2010-06-09
Publication date: 2011-02-02
Anticipated expiration: 2020-06-09

Abstract

The utility model discloses an auxiliary power system which comprises a primary transformer and one to a plurality of secondary transformers, wherein the primary transformer is an alternating-current transmission transformer; the one to a plurality of secondary transformers are transformers of different-class voltage required by the system; a primary coil of the primary transformer is connected with a high-frequency alternating-current power supply, and the output of a secondary coil thereof is directly connected with the primary coils of all the secondary transformers; the output of the secondary coil of each secondary transformer is connected with a full bridge rectifying circuit and then connected with a filter energy storing capacitor, and after voltage stabilization of an LDO (low drop output) voltage stabilizer and filtration of a filter capacitor, accurate power required by the system is obtained. The auxiliary power system can well solve the problem of power supply of a system with multiple auxiliary levels, has simple and reliable circuit and uses fewer components; and the isolation design is extremely convenient.

Description

Secondary power system

Technical field

The utility model relates to a kind of secondary power system of equipment and instrument.

Background technology

In all devices, instrument, secondary power system is that the entire equipment energy provides maincenter, the module that is absolutely necessary, and this Module Design quality is related to the cost of the reliability and the entire equipment of equipment operation.Need the power supply of multichannel different brackets power supply in the equipment that has, most variations is earlier AC power to be rectified to certain grade DC level at present, through various DC power supply chips power supply is changed into the required various DC level of system then.The major defect of this type of accessory power supply power supply plan is to need multiple power conversion chip, needs to be familiar with various conversion chips, and design is complicated, and system cost is higher; And under the situation that each power supply need be isolated, this scheme can not solve isolating problem well.

Summary of the invention

The purpose of this utility model is a kind of accessory power supply that multiple level can not only be provided to be provided, and can to solve the secondary power system of the isolating problem of various level well at the problem of above-mentioned existing accessory power supply power supply plan existence.

The purpose of this utility model is achieved in that the utility model comprises first order transformer and one or more second level transformer, described first order transformer is for exchanging transmission transformer, the transformer that described one or more second level transformer is the needed different brackets voltage of system, the primary coil of first order transformer connects high-frequency ac power, and the output of its secondary coil directly is connected with the primary coil of each second level transformer; The output of the secondary coil of each second level transformer connects full bridge rectifier, connects the filtering storage capacitor then, again after voltage stabilizing of LDO pressurizer and filter capacitor filtering, and the accurate power supply that the system that obtains is required.

Technique effect of the present utility model is: the utility model can be resolved the system power supply power supply plan that has the auxiliary level of multichannel, circuit is simple, and reliable, used components and parts are less, main components and parts have transformer, rectification diode and LDO pressurizer, and isolation design is very convenient.

Description of drawings

Fig. 1 is the circuit theory diagrams of embodiment one.

Fig. 2 is the circuit theory diagrams of embodiment two.

Embodiment

Referring to Fig. 1, embodiment one comprises first order transformer T1 and three second level transformer T2, T3, T4, first order transformer T1 is for exchanging transmission transformer, three second level transformer T2, T3, T4 is the transformer of the needed different brackets voltage of system, the primary coil of first order transformer T1 is generally imported high-frequency ac power, the voltage effective value of importing in the present embodiment is 13V, direct and each second level transformer T2 of the output of the secondary coil of first order transformer T1, T3, the primary coil of T4 is connected, the output of the secondary coil of each second level transformer connects full bridge rectifier and carries out rectification, connect the filtering storage capacitor then and carry out filtering, again after voltage stabilizing of LDO pressurizer and filter capacitor filtering, the accurate power supply that the system that obtains is required.With second level transformer T2 is example: rectifier diode D1, D2, D3, D4 form full bridge rectifier, the output of the secondary coil of second level transformer T2 connects the input of this full bridge rectifier, the output termination filter bank energy capacitor C 2 of full bridge rectifier, just can obtain electric pressure relatively stably through its filtering, receive the input of LDO pressurizer U1 again, the output termination filter capacitor C1 of LDO pressurizer U1, the accurate power supply that the system that obtains after filtering is required.Equally, rectifier diode D5, D6, D7, D8 form a full bridge rectifier, and rectifier diode D9, D10, D11, D12 form a full bridge rectifier, and C4, C6 are the filtering storage capacitor, and U2, U3 are the LDO pressurizer, and C3, C5 are filter capacitor.

The output of three second level transformers accurate power supply of gained after rectification, filtering, voltage stabilizing is separate among the embodiment one.If each power supply need not isolated, only need the earth terminal of the accurate power supply of gained is all linked to each other, shown in the embodiment two of Fig. 2.

Second level transformer is one or more in the utility model, is provided with according to system's needs.

Claims

1. secondary power system, it is characterized in that: comprise first order transformer and one or more second level transformer, described first order transformer is for exchanging transmission transformer, the transformer that described one or more second level transformer is the needed different brackets voltage of system, the primary coil of first order transformer connects high-frequency ac power, and the output of its secondary coil directly is connected with the primary coil of each second level transformer; The output of the secondary coil of each second level transformer connects full bridge rectifier, connects the filtering storage capacitor then, again after voltage stabilizing of LDO pressurizer and filter capacitor filtering, and the accurate power supply that the system that obtains is required.

2. secondary power system according to claim 1 is characterized in that: the output of described one or more second level transformer accurate power supply of gained after rectification, filtering, voltage stabilizing is separate.

3. secondary power system according to claim 1 is characterized in that: the earth terminal of the output of described one or more second level transformer accurate power supply of gained after rectification, filtering, voltage stabilizing all links to each other.