CN205123569U - DC power supply converting circuit is handed over in crossing input - Google Patents

Abstract

The utility model relates to a DC power supply converting circuit is handed over in crossing input, including input current foldback circuit, the general mode filter unit N1 of alternating current -direct current, the general type power module unit N2 of alternating current -direct current, output filter circuit, input 220V exchanges or 270V direct current system loops through the connection of input current foldback circuit, the general mode filter unit N1 of alternating current -direct current, the general type power module unit N2 of alternating current -direct current and is connected with output filter circuit. The beneficial effects of the utility model are that: circuit design is simple, and is with low costs, small, light in weight, and the debugging is convenient, and the practicality is strong, has good extension application.

Description

Staggered form input AC/DC power-switching circuit

Technical field

The utility model relates to power-switching circuit, particularly a kind of staggered form input AC/DC power-switching circuit.

Background technology

At present, in the application scenario of some equipment, externally fed power supply has polytype, comprising 220V ac power supply system and 270V DC power-supply system, this project indicator requires that the product provided can meet and normally works under above-mentioned two kinds of supply power modes, and this just requires that the power subsystem of this product can realize two kinds of Power convert modes simultaneously.What present stage adopted is design is application AC/DC power module and DC/DC power module two kinds of circuit, tackle input AC and input direct-current respectively, need to provide two kinds of input interfaces corresponding corresponding power-switching circuit respectively, adopt and need two kinds of power transfer module in this way, manual switchover input interface or external two power lines corresponding corresponding power-switching circuit is respectively needed when practical operation, if operate miss can directly have a negative impact to product even burn product, and cost compare is high, volume ratio is larger, be unfavorable for the expanded application of product, be unfavorable for design debug and the production and application of product, and reduce the competitiveness of product in market.

Summary of the invention

In view of the deficiency that prior art exists; the utility model provides a kind of staggered form to input AC/DC power-switching circuit; only need a kind of AC/DC universal type power transfer module can realize the voltage conversion function of two kinds of input patterns, and there is input overcurrent protection, output overcurrent protection, output over-voltage protection and overheat protector.

The utility model for achieving the above object, the technical scheme taked is: a kind of staggered form input AC/DC power-switching circuit, is characterized in that: comprise input overcurrent protection circuit, AC/DC universal mode filter unit N1, AC/DC universal type power module unit N2, output filter circuit; Described input 220V exchanges or 270V DC power-supply system is connected with output filter circuit by input overcurrent protection circuit connection, AC/DC universal mode filter unit N1, AC/DC universal type power module unit N2 successively;

Physical circuit connects: input 220V exchanges or the positive pole of 270V DC power-supply system is connected with the LI pin of AC/DC universal mode filter unit N1 by fuse F1, input 220V exchanges or the negative pole of 270V DC power-supply system is connected with the NI pin of AC/DC universal mode filter unit N1, the LO pin of AC/DC universal mode filter unit N1 is connected with the LI pin of AC/DC universal type power module unit N2, the NO pin pin of AC/DC universal mode filter unit N1 is connected with the NI pin of AC/DC universal type power module unit N2, the LO pin of AC/DC universal type power module unit N2 is connected with one end of electric capacity C1 and the positive pole exported as direct current by inductance L 1, the NO pin of AC/DC universal type power module unit N2 is connected with the other end of electric capacity C1 and the negative pole exported as direct current.

The beneficial effects of the utility model are: only need apply an input interface, power supply input both can be 220V ac power supply system, also can be 270V DC power-supply system, through the conversion of this circuit, can by output voltage stabilization at direct current 5V, 12V, 24V or 48V, inside only needs a kind of AC/DC universal type power transfer module can realize the voltage conversion function of alternating current-direct current two kinds of input patterns, the design cost reducing product at double, and there is input overcurrent protection, output overcurrent is protected, output over-voltage protection and overheat protector, front end arranges AC/DC universal mode filter, corresponding electromagnetic compatibility index request can be met.Circuit design is simple, and design cost is low, and small product size is little, lightweight, debugging is convenient, practical, can not connect damage equipment on the contrary because of two kinds of electric power systems, changing different module models can change output voltage values, has good extended application and improves the competitiveness of product in market.

Accompanying drawing explanation

Fig. 1 is that circuit of the present utility model connects block diagram;

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment

As shown in Figure 1, a kind of staggered form input AC/DC power-switching circuit, comprises input overcurrent protection circuit, AC/DC universal mode filter unit N1, AC/DC universal type power module unit N2, output filter circuit; Described input 220V exchanges or 270V DC power-supply system is connected with output filter circuit by input overcurrent protection circuit connection, AC/DC universal mode filter unit N1, AC/DC universal type power module unit N2 successively, and output filter circuit is connected with follow-up load circuit.

As shown in Figure 2, physical circuit connects: input 220V exchanges or the positive pole of 270V DC power-supply system is connected with the LI pin of AC/DC universal mode filter unit N1 by fuse F1, input 220V exchanges or the negative pole of 270V DC power-supply system is connected with the NI pin of AC/DC universal mode filter unit N1, the LO pin of AC/DC universal mode filter unit N1 is connected with the LI pin of AC/DC universal type power module unit N2, the NO pin pin of AC/DC universal mode filter unit N1 is connected with the NI pin of AC/DC universal type power module unit N2, the LO pin of AC/DC universal type power module unit N2 is connected with one end of electric capacity C1 and the positive pole exported as direct current by inductance L 1, the NO pin of AC/DC universal type power module unit N2 is connected with the other end of electric capacity C1 and the negative pole exported as direct current.

Fuse F1 selects corresponding model according to the size of operating current, and when operating current exceedes set point value, fuse F1 fuses, and forms input overcurrent protection circuit.

AC/DC universal mode filter unit N1 is AC/DC universal mode filter unit, not only has inhibitory action to interchange noise signal, and also have certain filter effect to direct current input, filter model can be selected according to concrete electromagnetic compatibility index request.

AC/DC universal type power module unit N2 is AC/DC universal type power module unit; adopt the NES-15 series of power module that MEANWELL company produces herein; the input voltage range of this power module is 85 ~ 264VAC or 120 ~ 370VDC; and module itself has output overcurrent protection, output over-voltage protection and overheat protector function; can by output voltage stabilization at 5V, 12V, 24V or 48V; specifically select output voltage according to product requirement, the index request of this power module unit can be met.

Inductance L 1 and electric capacity C1 form output filter circuit, for follow-up load circuit provides reliable and stable operating voltage.

Claims (2)

1. a staggered form input AC/DC power-switching circuit, is characterized in that: comprise input overcurrent protection circuit, AC/DC universal mode filter unit N1, AC/DC universal type power module unit N2, output filter circuit; Described input 220V exchanges or 270V DC power-supply system is connected with output filter circuit by input overcurrent protection circuit connection, AC/DC universal mode filter unit N1, AC/DC universal type power module unit N2 successively;

Physical circuit connects: input 220V exchanges or the positive pole of 270V DC power-supply system is connected with the LI pin of AC/DC universal mode filter unit N1 by fuse F1, input 220V exchanges or the negative pole of 270V DC power-supply system is connected with the NI pin of AC/DC universal mode filter unit N1, the LO pin of AC/DC universal mode filter unit N1 is connected with the LI pin of AC/DC universal type power module unit N2, the NO pin pin of AC/DC universal mode filter unit N1 is connected with the NI pin of AC/DC universal type power module unit N2, the LO pin of AC/DC universal type power module unit N2 is connected with one end of electric capacity C1 and the positive pole exported as direct current by inductance L 1, the NO pin of AC/DC universal type power module unit N2 is connected with the other end of electric capacity C1 and the negative pole exported as direct current.

2. staggered form input AC/DC power-switching circuit according to claim 1, is characterized in that: what AC/DC universal type power module unit N2 adopted is the NES-15 series of power module that MEANWELL company produces.