CN205544951U

CN205544951U - Low no -load loss's transformer system

Info

Publication number: CN205544951U
Application number: CN201620237971.2U
Authority: CN
Inventors: 高波; 蒙有为
Original assignee: Zhongshan Zunbao Industrial Co Ltd
Current assignee: Zhongshan Chenyuan Lighting Appliance Co ltd
Priority date: 2016-03-25
Filing date: 2016-03-25
Publication date: 2016-08-31
Anticipated expiration: 2026-03-25

Abstract

The utility model discloses a low no -load loss transformer system, including main transformer, low no -load loss's auxiliary electrical power source, a single -chip microcomputer, electronic switch and load detecting element, break off main transformer when unloaded and only use the auxiliary electrical power source of low -power consumption, utilize the singlechip when main transformer T1 is unloaded output pulse scanning signal electronic switch is instantaneous switches on with control, whether load detecting element real -time detection load return circuit switches on, in case detecting, the load switch closure can control the electronic switch normal close when carry in the main transformer T1 area, main transformer normal use accords with fully loaded high efficiency, thereby realize making when the empty load loss greatly reduced in order to satisfy american efficiency DOE standard index.

Description

A kind of voltage transformer system of low no-load loss

Technical field

This utility model relates to Power Electronic Technique, the voltage transformer system of a kind of low no-load loss.

Background technology

Conventional transformer designs scheme, when pursuing powerful, inevitably causes bigger open circuit loss, A kind of power 300W be the open circuit loss of main flow transformator often as high as 9.5W, can be suitable in developing country, once Exporting to developed country, such as the U.S., its DOE energy efficiency indexes requires that the no-load power consumption of transformator is less than 0.2W ~ 0.3W.Therefore, Manufacturer's all effort in the open circuit loss for reduction transformator.

Owing to the open circuit loss of transformator is primarily due to the reactive power that transformer core consumes, if zero load to be reduced Loss, it is necessary to reducing reactive power, therefore, the improvement project that existing producer proposes is the iron core that serviceability is more excellent, And increase coil turn, so, just directly contribute cost increase, and volume of transformer is huge.

Utility model content

For the limitation of above-mentioned traditional transformer self, the design is to reach up-to-date Energy Efficiency Standard, uses a kind of existing Low cost condition meets the low no-load loss voltage transformer system of DOE energy efficiency indexes.

The technical solution adopted in the utility model is:

A kind of voltage transformer system of low no-load loss, including main transformer T1, accessory power supply, single-chip microcomputer, electrical switch, with And load detecting unit, described main transformer T1 is simultaneously used for incoming transport mains-supplied side with the input of accessory power supply, main The secondary windings of transformator T1 is for series load switch S and loads to constitute load circuit, and load detecting unit is used for detecting Whether load circuit turns on and is connected with single-chip microcomputer to feed back main transformer T1 band information carrying number, the outfan of described accessory power supply with The input of single-chip microcomputer connects, and electrical switch is serially connected between main transformer T1 input and electric main supply side and controls end It is connected with single-chip microcomputer；For exporting pulse scanning signal when main transformer T1 zero load, to control, electrical switch is instantaneous leads single-chip microcomputer Logical, and control electrical switch when main transformer T1 band carries normally closed.

Preferably, described electrical switch is made up of relay K 1 and audion Q1, and the normally opened contact of relay K 1 is serially connected in Between described main transformer T1 input and electric main supply side, the coil two ends of relay K 1 export with accessory power supply respectively End, the colelctor electrode of audion Q1 connect, the pulse scanning signal output of the grounded emitter of audion Q1 and base stage and single-chip microcomputer End connects.

Wherein, described load detecting unit is that voltage transformer, current transformer, photoelectric sensor close with load switch S One or more in the detection switch of linkage during conjunction.

One of preferably, described accessory power supply include low no-load loss auxiliary transformer T2 and with auxiliary transformer T2 time Level winding be sequentially connected with rectification circuit, filter circuit, this filter circuit outfan is connected with described single-chip microcomputer.

Two preferably, described accessory power supply is the Switching Power Supply of low no-load loss.

Further, being provided with, between described accessory power supply and single-chip microcomputer, bleeder circuit of connecting, this series connection bleeder circuit is used for Whether the input voltage of detection accessory power supply exists too low or too high for voltage to feed back to single-chip microcomputer.

The beneficial effects of the utility model:

This utility model voltage transformer system uses main transformer to be applied in combination with the accessory power supply of low no-load loss, in conjunction with single The mechanical, electrical sub-switch of sheet and load detecting unit etc. control parts, disconnect main transformer and only use the auxiliary of low-power consumption time unloaded Power supply, utilize single-chip microcomputer export when main transformer T1 zero load pulse scanning signal to control the instantaneous conducting of electrical switch, load Detector unit detects whether load circuit turns in real time, the most controlled to main transformer T1 band load once load switch occlusion detection Electrical switch processed is normally closed, and main transformer normally uses and meets fully loaded high efficiency, thus realizes making loss be substantially reduced when zero load To meet U.S.'s efficiency DOE standard index.Additionally, series connection bleeder circuit the most easily realizes under-voltage/overvoltage/overload/short circuit etc. Protection.

Accompanying drawing explanation

Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is described further.

Fig. 1 is the theory diagram of this utility model voltage transformer system；

Fig. 2 is the specific embodiment circuit diagram of this utility model voltage transformer system.

Detailed description of the invention

As it is shown in figure 1, be the voltage transformer system of a kind of low no-load loss of the present utility model, including main transformer T1, auxiliary Help power supply, single-chip microcomputer, electrical switch and load detecting unit.

The concrete annexation of above-mentioned core component is: main transformer T1 is simultaneously used for accessing with the input of accessory power supply Electric main supply side, the secondary windings of main transformer T1 is for series load switch S and loads to constitute load circuit, load Detector unit is used for detecting whether load circuit turns on and be connected with single-chip microcomputer to feed back main transformer T1 band information carrying number, described auxiliary Helping the outfan of power supply to be connected with the input of single-chip microcomputer, electrical switch is serially connected in main transformer T1 input and supplies with electric main Electricity side between and control end be connected with single-chip microcomputer.

Its operation principle is: time unloaded, and electrical switch disconnects, and the primary side winding of main transformer does not has electric power input only to make With the accessory power supply of low-power consumption, single-chip microcomputer is utilized to export pulse scanning signal when main transformer T1 zero load to control electrical switch Instantaneous conducting, load detecting unit detects whether load circuit turns in real time, and once load switch occlusion detection is to main transformer It is normally closed that T1 band can control electrical switch when carrying, and main transformer normally uses and meets fully loaded high efficiency, thus realizes when zero load Loss is made to be less than 0.2W to meet U.S.'s efficiency DOE standard index.

As in figure 2 it is shown, be specific embodiment of the utility model, electrical switch is made up of relay K 1 and audion Q1, The normally opened contact of relay K 1 is serially connected between described main transformer T1 input and electric main supply side, the line of relay K 1 Circle two ends colelctor electrode with auxiliary power output end, audion Q1 respectively is connected, the grounded emitter of audion Q1 and base stage and The pulse scanning signal output part of single-chip microcomputer connects.It is pointed out that electrical switch can also have other examples, such as may be used Control silicon and other switching devices, audion Q1 also can be substituted by the known device for power switching such as field effect transistor, IGBT.

And load detecting unit uses voltage transformer B, unique reality of certain voltage transformer not load detecting unit Execute example, it would however also be possible to employ when current transformer, photoelectric sensor and load switch S Guan Bi, the detection switch of linkage etc. are known Load detecting unit, can use different detector units, such as load just can use light for light fixture according to the difference of load Electric transducer, just can use sound transducer when loading as other electrical equipment such as speaker, say, that load detecting unit Include but not limited to examples detailed above.

In the present embodiment accessory power supply include low no-load loss auxiliary transformer T2 and with T2 level of auxiliary transformer Rectification circuit that winding is sequentially connected with, filter circuit, this filter circuit outfan is connected with described single-chip microcomputer, wherein, rectified current Road is the half bridge rectifier of diode D1 and D2 composition, and filter circuit is electric capacity C1, C2 and three terminal regulator U.Additionally, auxiliary Power supply can also be the Switching Power Supply of low no-load loss, or low no-load loss power supply known to other.

The work process of the present embodiment is specific as follows:

1) when connecting input voltage, main transformer T1 does not works, and auxiliary transformer T2 works, now system open circuit loss Equal to the open circuit loss of auxiliary transformer T2, i.e. P0=P02.Owing to the open circuit loss of T2 is smaller, so being easily done P02 Less than 0.2W.

2) when T2 works, we set the RLY pin of single-chip microcomputer and export a pulse scanning signal, directly through audion Q1 controls relay K 1, and when pulse signal is in t1, main transformer T1 turns on, now open circuit loss P0=P01+P02；When sweeping Retouch signal when being in t2, open circuit loss P0=P02；Because t2 is the biggest t1, it is possible to think at whole cycle T (T=t1+t2) Interior input open circuit loss P ≈ P02.

3) disconnecting as load switch S, we are exactly the requirement that the mode continually scanned for achieves low no-load loss.

4) if load switch S connects, when sweep waveform is in t1, main transformer T1 secondary windings has electric current I to pass through, logical Overvoltage transformer B is to single-chip microcomputer signal, and single-chip microcomputer sends instruction allows relay K 1 connect, so that main transformer T1 is in work Make state, it is achieved entered into normal operating conditions by main transformer T1.Owing to main transformer T1 need not take into account open circuit loss, Reach to specify requirement so main transformer T1 efficiency can be designed.5) when load switch S disconnects, the secondary electrical of main transformer T1 Stream I=0, voltage transformer B signal is zero, and single-chip microcomputer sends cut out relay instruction, and whole circuit returns to scan mode, real Existing unloaded low-loss.

Additionally, further expanding as the technical program, it is provided with between described accessory power supply and single-chip microcomputer and connects point Volt circuit, whether this series connection bleeder circuit exists too low or too high for voltage to feed back to for the input voltage detecting accessory power supply Single-chip microcomputer, the series connection bleeder circuit of R1 and R21 composition the most easily realizes the protections such as under-voltage/overvoltage/overload/short circuit.

The foregoing is only preferred embodiments of the present utility model, this utility model is not limited to above-mentioned embodiment, As long as realizing within the technical scheme of this utility model purpose broadly falls into protection domain of the present utility model with essentially identical means.

Claims

1. the voltage transformer system of a low no-load loss, it is characterised in that: include that main transformer T1, accessory power supply, monolithic are mechanical, electrical Son switch and load detecting unit, described main transformer T1 is simultaneously used for incoming transport civil power with the input of accessory power supply Supply side, the secondary windings of main transformer T1 is for series load switch S and loads to constitute load circuit, load detecting unit For detecting whether load circuit turns on and be connected with single-chip microcomputer to feed back main transformer T1 band information carrying number, described accessory power supply Outfan is connected with the input of single-chip microcomputer, and electrical switch is serially connected between main transformer T1 input and electric main supply side And control end is connected with single-chip microcomputer；Single-chip microcomputer for exporting pulse scanning signal to control electronic cutting when main transformer T1 zero load Close instantaneous conducting, and control electrical switch when main transformer T1 band carries normally closed.

The voltage transformer system of a kind of low no-load loss the most according to claim 1, it is characterised in that: described electrical switch by Relay K 1 and audion Q1 composition, the normally opened contact of relay K 1 is serially connected in described main transformer T1 input and electric main Between supply side, the coil two ends of relay K 1 colelctor electrode with auxiliary power output end, audion Q1 respectively is connected, audion The grounded emitter of Q1 and base stage scan signal output part with the pulse of single-chip microcomputer and are connected.

The voltage transformer system of a kind of low no-load loss the most according to claim 1, it is characterised in that: described load detecting list One in the detection switch of linkage when unit is voltage transformer, current transformer, photoelectric sensor and load switch S Guan Bi Or it is multiple.

The voltage transformer system of a kind of low no-load loss the most according to claim 1, it is characterised in that: described accessory power supply bag Include auxiliary transformer T2 and the rectification circuit being sequentially connected with auxiliary transformer T2 secondary windings, the filtered electrical of low no-load loss Road, this filter circuit outfan is connected with described single-chip microcomputer.

The voltage transformer system of a kind of low no-load loss the most according to claim 1, it is characterised in that: described accessory power supply Switching Power Supply for low no-load loss.

6. according to the voltage transformer system of a kind of low no-load loss described in claim 4 or 5, it is characterised in that: described auxiliary electricity Being provided with bleeder circuit of connecting between source with single-chip microcomputer, whether this series connection bleeder circuit for detecting the input voltage of accessory power supply Exist too low or too high for voltage to feed back to single-chip microcomputer.