CN2655466Y

CN2655466Y - Power converter and socket

Info

Publication number: CN2655466Y
Application number: CN 200320116794
Authority: CN
Inventors: 马孟明
Original assignee: Giga Byte Technology Co Ltd
Current assignee: Giga Byte Technology Co Ltd
Priority date: 2002-12-11
Filing date: 2003-12-05
Publication date: 2004-11-10
Anticipated expiration: 2013-12-05

Abstract

The utility model discloses a power shifter and a socket, wherein mainly a circuit which corrects the power factor is equipped independent with a power supplier and is equipped on an extending line socket or a power shifter to make the power supplier fit regulations of different norms only by a single size, the power supplier needn't the circuit, only inserting the plug in the utility model can generate the function of power factor correcting, the socket comprises a plug, which can be inserted on the plugging hole to receive outer power source, a wire connected on the plug to transmit the received power source received by the plug, and a socket body electrically connected with the wire with a plurality of sockets for the inserting of a plurality of electrode devices, and the socket body also comprises a power factor correcting circuit electrically connected with the plurality of sockets.

Description

Power supply changeover device and socket

Technical field

The utility model relates to a kind of power supply changeover device and socket, particularly a kind of power factor correction circuit is independent of power supply unit outer power supply changeover device and socket.

Background technology

Under the global energy condition of limited, the benefit that the energy uses is more and more paid attention in countries in the world, so designing and developing also of household electrical appliances and electronic equipment advanced towards the trend of environmental protection power saving.Advanced country also revises the validity that every laws and regulations of energy comes the standard energy to use successively, as rising by European specification standards-EN61000 January calendar year 2001, stipulate that all electronic products more than 75 watts all need have Active PFC (Power Factor Correction; PFC) function.Integrated circuit with Active PFC function can reduce irregular electric current input, and then reduces the waste of the energy on electric power distribution system, fully effectively uses the valuable energy.At present, the supply of U.S. Fairchild Semiconductor International as ML4800, can increase substantially the energy use efficiency more than 20% in conjunction with the two-in-one PFC product of pulse wavelength width modulation (Pulse Width Modulation) with the Active PFC function.

We can inquire into the practical significance of power factor (PF) from user and Utilities Electric Co. two aspects; At first, generally can supply with the electric current of 15A and give load, not have Active PFC (Power factor Correction at this condition next one at the supply hub of a 115VAC; PFC) its effective current of the power supply unit of circuit (general P.F.=0.6) can reduce to 9A from 15A.For example, a supply hub can be supplied with 4 computers (280W) with pfc circuit simultaneously and use, but uses for two computers that do not contain the PFC. circuit.And for Utilities Electric Co., reactive power (ReactivePower, Q) and distortion power (distortion Power, D) because harmonic current cause, unnecessary power loss will lower the efficient of electric power network, and Utilities Electric Co. must use thicker cable to come transferring electric power; In addition, harmonic current can cause electric pollution, makes the electric power control of Utilities Electric Co. difficult.Made the harmonic current size that EN60555 and international norm IEC 555-2 limit power-supply device in Europe.Europe is for light fixture and must install pfc circuit additional greater than the electric equipment of 70-80W and just can import, this regulation will be implemented in 1998, therefore the monitor (monitor), the power supply unit (SMPS) that are known as the preparation that Taiwan produces of computer kingdom ..., all must there be pfc circuit just can strive for bigger business opportunity.

And the present modal practice is that pfc circuit is set up in power supply unit, is sold to the zone of code requirement, and does not have the zone of code requirement, then need not install pfc circuit additional.Therefore the power supply unit of being produced will have two kinds of specifications, also just need two secondary moulds, two kinds of production procedures, cause the puzzlement on the production line.And the product of two kinds of specifications can't be shared, in case on one side certain is produced too much, be not because cost uprises, be exactly because can't pass through standard, and have no idea to share, and causes hoarding of stock.Simultaneously, set up the power supply unit of pfc circuit, all need to set up the raising that pfc circuit also can cause cost in each power supply unit with needs.

Summary of the invention

Main purpose of the present utility model is to provide a kind of power supply changeover device that addresses the above problem and socket, is that power factor correction circuit is independent, saves the power supply unit of known plurality of specifications, deducts technologic puzzlement.

Above-mentioned purpose of the present utility model is achieved in that a socket, includes: a plug can be plugged on the jack, and receive extraneous power supply; One lead is connected in this plug, can transmit the power supply that this plug receives; And a socket, be electrically connected with this lead, and have a plurality of sockets and can peg graft for a plurality of electronic installations; Also include a power factor correction circuit that is electrically connected with these a plurality of sockets in this socket.

Socket described in the utility model, wherein this socket also includes a switch, in order to control the switch of this socket.

The utility model also provides a kind of power supply changeover device, can be coupled between a power supply unit and the extraneous AC power, include: a power supply changeover device body, one power factor correction circuit, wherein, described power supply changeover device body has an input port and an output port, this output port is coupled in this power supply unit, and this input port can receive this external world's AC power; Described power factor correction circuit, be installed in this power supply changeover device body, and be electrically connected, can receive this external world's AC power by this input port with this input port and this output port, and outwards spread out of, and can reduce the loss of this power supply by this output port.

Power supply changeover device described in the utility model, wherein this power supply unit can be connected in an electronic equipment, and can provide this electronic equipment required power supply.

Power supply changeover device described in the utility model, wherein this input port is by a lead this external world's AC power that is coupled.

By said structure as can be known, power supply changeover device that the utility model disclosed and socket, mainly be that the power factor correction circuit that will originally be located in the power supply unit is independent of outside the power supply unit, include power supply changeover device body and power factor correction circuit, the power supply changeover device body has an output port and an input port, inside is provided with power factor correction circuit, receive extraneous AC power by input port, pass through power factor correction circuit, and export a power supply unit that couples to by output port, and can supply with the required electric power of electronic equipment.Because of power factor correction circuit is independent of outside the power supply unit, but be positioned on the path that electric current flows through, and can reach the purpose of Active PFC equally, and because be independent setting, so power supply unit only need use single specification to produce, if any code requirement, then only need on the power supply changeover device body, to install power factor correction circuit additional, for power supply unit, do not need special requirement production.

On the other hand, ease of use for by a larger margin raising power factor correction circuit, more it can be set up on sockets such as extended line, for electronic installation, need not consider whether to have the requirement of standard fully, only need its power supply is imported by on the plug with power factor correction circuit, can reach the function of Active PFC.

Description of drawings

Fig. 1 is the block diagram of the annexation between expression power supply changeover device described in the utility model and power supply and the power supply unit;

Fig. 2 is the circuit block diagram of power supply changeover device described in the utility model;

Fig. 3 is the three-dimensional exploded view that power supply changeover device described in the utility model is connected with power supply and power supply unit;

Fig. 4 represents the block diagram of the inside annexation of socket described in the utility model;

Fig. 5 is the circuit block diagram of socket described in the utility model;

Fig. 6 is the three-dimensional structure diagram of socket described in the utility model.

Wherein Reference numeral is as follows:

10 power supply changeover device bodies, 11 input ports

12 output ports, 13 pfc circuits

14 fuses, 20 jack bodies

22 sockets, 23 sockets

24 sockets, 25 sockets

27 switches, 30 AC power

31 power supply units, 40 plugs

41 leads, 70 electronic equipments

Embodiment

According to power supply changeover device and the socket that the independent power factor is proofreaied and correct (PFC) circuit that have that the utility model disclosed, mainly be with Active PFC (Power factor Corrector; PFC below only replaces with PFC) circuit design is positioned at outside the power supply unit of electronic installation, and can make the specification unification of power supply unit.

See also Fig. 1, Fig. 2, shown in Figure 3, for a kind of power supply changeover device with independent power factor correction (PFC) circuit, include power supply changeover device body 10 and pfc circuit 13, wherein the basic principle of operation of power factor correction circuit is as follows:

Active PFC (Power factor Corrector) is one basically and exchanges the transducer that changes direct current (ACto DC), so identical with the framework of change type power supply unit.The change type power supply unit of a standard utilizes pulse wavelength width modulation (Pulse Width Modulation) to adjust the size of input power, required to supply suitable load, pulse wavelength width modulator control its switch (utilizing Power MOSFET to reach usually) is cut into a string potential pulse with ac input voltage, utilize transformer and fast diode that it is changed into level and smooth dc voltage output subsequently, this output voltage compares with a reference voltage (this voltage is the standard voltage value that power supply unit should be exported) immediately, the voltage difference that is produced is feedback to the controller of PWM, utilize this error voltage signal to change the size of pulse wavelength width, if output voltage is too high, the pulse wavelength width can reduce, and then reduce the power supply supply, make output voltage return back to normal output valve.

A P.F.C. utilizes this method, but add a more advanced assembly make electric current from AC power supplies be a sine wave and with AC voltage same-phase, this moment, the modulation of error voltage signal was to be controlled by the variation of dc voltage after the rectification and output voltage, last error voltage signal is feedback to the PWM controller, that is to say that the P.F.C. circuit is just drawn more power from AC power supplies when AC voltage is higher, otherwise then attract less power if AC voltage is low, the harmonic wave that so can reduce the AC electric current produces.

Do the time spent at the power factor (PF) rectifier, must keep following state:

1) the instantaneous input current of power supply will change along with the instantaneous voltage of power supply, with guarantee input current be a sine wave and with the voltage same-phase.

2) the square root power that provides of AC power supplies must be kept definite value, even AC voltage has change.This represents that also the AC electric current must increase when the AC voltage of input reduces.

3) no matter how load changes, it is certain that the DC output voltage still must keep.For example, if the DC output voltage descends, the electric current of the load of then flowing through must increase to till the voltage answer.

And the utility model is that the pfc circuit 13 that originally is arranged in the power supply unit 31 is independent, as shown in Figure 1 and Figure 2, therefore, power supply unit 31 changes in response to the standard of zones of different, country with regard to not needing, and only need single specification, when if the demand on the standard is arranged, then install pfc circuit 13 additional and get final product in power supply changeover device body 10 inside.It mainly is to utilize the input port 11 of power supply changeover device body 10 both sides and output port 12 to come the input and output electric current, utilize connection such as lead and make input port 11 can receive extraneous AC power 30, outwards export on the power supply unit 31 that couples by output port 12 by a fuse 14, a pfc circuit 13 backs, and can provide required power supply to power supply unit 31 places or the electronic equipment 70 that is connected, wherein, electronic equipment 70 can be desktop computer, portable computer, display etc. the electronic installation that needs the PFC standard.Wherein, input port 11 has a live wire (Line), ground wire (Neture), earth terminal (Ground) respectively with output port 12, the live wire of this input port 11, ground wire, earth terminal are connected with live wire, ground wire, the earth terminal of output port 12 respectively, and are connected with fuse 14 and pfc circuit 13 between the live wire of the live wire of input port 11 and output port 12.Because this pfc circuit 13 is known circuit, and the annexation between this circuit and the live wire is technology well known by persons skilled in the art, so do not give unnecessary details at this.

On the other hand, see also Fig. 3, Fig. 4, shown in Figure 5, be the second embodiment schematic diagram of the present utility model, main notion is that pfc circuit 13 is set up on sockets such as extended line, and be a kind of socket that the independent power factor is proofreaied and correct (PFC) circuit that has, no matter and can make electronic installation need the requirement of standard, be single specification without exception, only need utilize the socket of use to make change.Include jack body 20, lead 41 and plug 40, plug 40 forms by the connection of lead 41 and with jack body 20 and is electrically connected, and plug 40 can be plugged on the jack of AC power 30, and the extraneous alternating current of reception, be supplied to jack body 20, has a switch 27 on the jack body 20, one pfc circuit 13 and a plurality of

socket

22,23,24,25 (illustrate among the figure is four, but be not defined as four), because relation by pfc circuit 13, so be plugged in

socket

22,23,24, electronic installation on 25 all can have the function of Active PFC.When switch 27 is the state of opening, electric current from external ac power source 30 flows into jack body 20 through lead 41, in jack body 20, input port 11 receives this electric current, and outwards exports each

socket

22,23,24,25 by a fuse 14, a pfc circuit 13 backs to by output port 12.

The above only is the utility model preferred embodiment wherein, is not to be used for limiting this novel practical range; Be that all equalizations of being done according to the utility model claim change and modification, all be encompassed in the claimed claim of the utility model.

Claims

1. socket, include: a plug is plugged on the jack; One lead is connected in this plug; And a socket, be electrically connected with this lead, and have a plurality of sockets that the sub-device of power supply is pegged graft; It is characterized in that,

Also include a power factor correction circuit that is electrically connected with these a plurality of sockets in the described socket.

2. socket as claimed in claim 1 is characterized in that, described socket also comprises one in order to control the switch of this socket.

3. a power supply changeover device is coupled between a power supply unit and the extraneous AC power, it is characterized in that, comprises:

One power supply changeover device body has an input port and an output port, and this output port is coupled in this power supply unit, and this input port is connected in this external world's AC power; And

One power factor correction circuit is installed in this power supply changeover device body, and is electrically connected with this input port and this output port.

4. power supply changeover device as claimed in claim 3 is characterized in that described power supply unit is connected in an electronic equipment.

5. power supply changeover device as claimed in claim 3 is characterized in that, described input port is by a lead this external world's AC power that is coupled.