CN209692631U - Exchange turns high direct voltage radiator fan - Google Patents

Abstract

The utility model discloses a kind of exchanges to turn high direct voltage radiator fan, including ac input end and rectifier bridge, rectification bridge output end connects power management chip U1 and diode D2, the common end of the connection of the 4th pin capacitor C2, C3 and diode D3 of power management chip U1, capacitor C2, C3 other end connects the first pin and second pin of power management chip U1, and the other end of diode D3 connects the first pin and second pin of power management chip U1 through resistance R3 with inductance L；The first pin and second pin of the other end connection power management chip U1 of diode D2；Resistance R3 connects zener diode Z1, capacitor C1 and resistance R4 in parallel with the common end of inductance L, and zener diode Z1, capacitor C1 and the resistance R4 other end are grounded, and the common end output voltage of resistance R3 and inductance L are connect with radiator fan load circuit.The utility model solves the problems, such as that high-voltage filtering capacitor can not accomplish ideal size, and this operating voltage range is wide.

Description

Exchange turns high direct voltage radiator fan

Technical field

The utility model relates to fans, particularly relate to a kind of exchange and turn high direct voltage radiator fan.

Background technique

As shown in Figure 1, to make AC to DC radiator fan in current brushless radiating fan field, at this time way is all It is by alternating current by making power management IC work after rectifier bridge and capacitance rectifier filtering, the pressure resistance of high-voltage electrolytic capacitor is big In DC400V, corresponding capacitor size is very big, and the size of high-voltage electrolytic capacitor can not be reduced to perfect condition, and minimum dimension is all It is 6.3*12 centimeters, causes the size of brushless radiating fan that can not further reduce, limit the use scope of radiator fan.

Utility model content

The utility model proposes a kind of exchanges to turn high direct voltage radiator fan, solves high-voltage electrolytic capacitor in the prior art Size can not be reduced to perfect condition, cause the size of brushless radiating fan that can not further reduce, limit radiator fan Use scope the problem of.

The technical solution of the utility model is achieved in that

A kind of exchange turns high direct voltage radiator fan, including ac input end and rectifier bridge, the ac input end connection The input terminal of the rectifier bridge, the rectification bridge output end connect power management chip U1 and diode D2, the power management The common end of the connection of the 4th pin capacitor C2, C3 and diode D3 of chip U1, capacitor C2, C3 other end connect power supply pipe The first pin and second pin of chip U1 are managed, the other end of the diode D3 connects power management with inductance L through resistance R3 The first pin and second pin of chip U1；The diode D2 the other end connection power management chip U1 the first pin and Second pin；The resistance R3 connects in parallel zener diode Z1, capacitor C1 and resistance R4 with the common end of inductance L, described Zener diode Z1, capacitor C1 and resistance R4 other end ground connection, the common end output voltage and heat dissipation of the resistance R3 and inductance L Fan load circuit connection.

Preferably, the input voltage range of the ac input end is 90V~350V.

Preferably, the radiator fan load circuit includes inductance L1, inductance L2 and resistance R5, the inductance L1, inductance L2 and resistance R5 are in parallel, and one end is connect with the common end output end of the resistance R3 and inductance L, other end connecting interface terminal.

Preferably, the inductance L and capacitor C1 provides electricity.

Preferably, the common end grounding of the 4th pin and diode D2 of the rectifier bridge.

The utility model has the beneficial effects that: solving the size of high-voltage electrolytic capacitor in the prior art can not be reduced to The problem of perfect condition, leading to the size of brushless radiating fan can not further reduce, limit the use scope of radiator fan.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the circuit diagram that exchange turns high direct voltage radiator fan one embodiment in the prior art；

Fig. 2, which is that the present invention is a kind of, exchanges the circuit diagram for turning high direct voltage radiator fan one embodiment；

Fig. 3 is the main view of high pressure radiator fan one embodiment；

Fig. 4 is the right view of high pressure radiator fan one embodiment.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts Every other embodiment obtained, fall within the protection scope of the utility model.

As shown in Fig. 2, the utility model proposes a kind of exchanges to turn high direct voltage radiator fan, including ac input end and Rectifier bridge, ac input end connect the input terminal of rectifier bridge, and rectification bridge output end connects power management chip U1 and diode D2, The common end of the connection of the 4th pin capacitor C2, C3 and diode D3 of power management chip U1, capacitor C2, C3 other end connection electricity The other end of the first pin and second pin of source control chip U1, diode D3 connects power management with inductance L through resistance R3 The first pin and second pin of chip U1；The first pin and second of the other end connection power management chip U1 of diode D2 Pin；Resistance R3 connects in parallel zener diode Z1, capacitor C1 and resistance R4 with the common end of inductance L, zener diode Z1, The common end output voltage of capacitor C1 and resistance R4 other end ground connection, resistance R3 and inductance L are connect with radiator fan load circuit. The common end grounding of 4th pin and diode D2 of rectifier bridge.Radiator fan load circuit includes inductance L1, inductance L2 and electricity R5 is hindered, inductance L1, inductance L2 and resistance R5 are in parallel, and one end is connect with the common end output end of resistance R3 and inductance L, and the other end connects Connection interface terminal.The input voltage range of ac input end is 90V~350V.Inductance L and capacitor C1 provides electricity.D1 is rectification Bridge, by after D1 rectifier bridge, becoming the impulse wave supply U1 of only positive half cycle, (U1 is power supply pipe to AC90V~AC350V alternating current Manage IC), at this time entire circuit is started to work.Entire circuit energy is provided by L inductance and C1 late-class circuit.

The utility model removes the filter capacitor after D1, directly supplies electricity to power management chip U1, and pass through U1 connection The decompression of BUCK circuit, capacitor C1 is storage capacitor, and C2 and C3 are conventional capacitive, and size is much smaller than the ruler of high-voltage electrolytic capacitor It is very little.As Figure 3-Figure 4, the utility model can be very good to be used on dimensions above fan and in some small-sized equipment, There are many brushless radiating fan/and 80 centimeters * 25 centimeters/60 centimeters * 25 centimeters/90 centimeters * 25 centimeters, it is 25 centimeters thick for radiator fan Degree is length and width with 80 centimeters.And it is not influenced by capacitor size.The utility model also significantly improves entire dissipate on this basis The pressure-resistant range of Hot-air fan.It is not influenced that the left side AC350V for entire radiator fan circuit pressure resistance can be promoted to by D1 post filtering capacitor The right side, this is that traditional fan is not accomplished.Just because of this Optimality, increases use scope, this fan resistance to pressure is enhanced. Circuit is readily appreciated that pcb board processed is also easily often simple.Alternating current known on schematic diagram by after rectifier bridge directly to power management core Piece U1 power supply, power management chip U1 can work.This circuit, which solves high-voltage filtering capacitor, can not accomplish asking for ideal size Topic, and this operating voltage range is wide, and AC90V~AC350V directly can carry successive load circuit by band.

The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (5)

1. a kind of exchange turns high direct voltage radiator fan, including ac input end and rectifier bridge, the ac input end connects institute State the input terminal of rectifier bridge, it is characterised in that: rectification bridge output end connection power management chip U1 and diode D2, it is described The common end of the connection of the 4th pin capacitor C2, C3 and diode D3 of power management chip U1, capacitor C2, C3 other end connect The first pin and second pin of power management chip U1 are connect, the other end of the diode D3 is connected through resistance R3 with inductance L The first pin and second pin of power management chip U1；The of the other end connection power management chip U1 of the diode D2 One pin and second pin；The resistance R3 connects zener diode Z1, capacitor C1 and resistance in parallel with the common end of inductance L The common end of R4, the zener diode Z1, capacitor C1 and resistance R4 other end ground connection, the resistance R3 and inductance L export electricity Pressure is connect with radiator fan load circuit.

2. exchange according to claim 1 turns high direct voltage radiator fan, it is characterised in that: the ac input end it is defeated Entering voltage range is 90V~350V.

3. exchange according to claim 1 turns high direct voltage radiator fan, it is characterised in that: the radiator fan load electricity Road includes inductance L1, inductance L2 and resistance R5, the inductance L1, inductance L2 and resistance R5 in parallel, one end and the resistance R3 and The common end output end of inductance L connects, other end connecting interface terminal.

4. exchange according to claim 1 turns high direct voltage radiator fan, it is characterised in that: the inductance L and capacitor C1 Electricity is provided.

5. exchange according to claim 1 turns high direct voltage radiator fan, it is characterised in that: the 4th of the rectifier bridge draws The common end grounding of foot and diode D2.