CN1079848A - Plug-type electronic transformer - Google Patents
Plug-type electronic transformer Download PDFInfo
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- CN1079848A CN1079848A CN 92107672 CN92107672A CN1079848A CN 1079848 A CN1079848 A CN 1079848A CN 92107672 CN92107672 CN 92107672 CN 92107672 A CN92107672 A CN 92107672A CN 1079848 A CN1079848 A CN 1079848A
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Abstract
Plug-type electronic transformer belongs to transformer, is made up of attaching plug, high frequency transformer, rectifier, oscillator, lead-out terminal, insulation shell.It is characterized in that: improve electric frequency, reduce the weight and the volume of transformer significantly, all device is installed in the insulation shell, and attaching plug directly is inserted on the mains power socket, from lead-out terminal output low-voltage power; It is characterized in that: oscillator circuit structure is semibridge system or paralleling switch formula or monofocal or integrated module type structure, and the high frequency transformer magnetic core adopts ferrite or permalloy.
The present invention provides a kind of portable low-tension supply that directly is inserted in the supply socket for small electrical utensil, electric lighting, electric tool, has created good condition for the small electrical utensil updates.
Description
The present invention relates to the low-tension supply of transformer, electronic transformer and electrical equipment, tool.The purpose of this utility model is for small-power electric tool, electrical equipment, electric lighting, electric medical apparatus etc. provide a kind of light small and exquisite power transformer, to replace heavy burdensome Industrial Frequency Transformer, makes the use of electrical equipment, tool and carries safer, light.
For near electrical equipment, tools (hereinafter to be referred as electrical equipment, tool) such as the electric tool of human body, electrical equipment, electric lighting, electric medical apparatus, require power voltage supply safe in utilization as far as possible, to guarantee user's personal safety, the electrical equipment of some particular job conditions, tool also need low-voltage power supply.This series products is powered by the method for transformer step-down after mostly adopting the power frequency civil power that induces one at present.
Because Industrial Frequency Transformer occupies suitable volume and weight in electrical equipment, tool, make electrical equipment, tool use with carry very inconvenient.For electrical equipment, the tool of the above power of 50W, just be difficult to Industrial Frequency Transformer is installed in electrical equipment, tool main body.
For solving the miniaturization and the safety problem of electrical equipment, tool power transformer, Chinese patent CN91213398.8(notification number 2090128U) once proposed to replace Industrial Frequency Transformer with plug-type electronic transformer, in this patent, the circuit structure of oscillator is not done clearly statement, only in patent specification accompanying drawing seven, showed a half bridge circuit structure.So simple example makes the enforcement of this patent acquire a certain degree of difficulty.Can not utilize the characteristics of various circuit and components and parts to improve the technical and economic peculiarities of self.
In addition,, in implementation process, quote the permalloy magnetic core, can widen the material source of high frequency transformer, help the commercialization of plug-type electronic transformer, and above-mentioned patent has been ignored this on the one hand because permalloy and ferrite have the similar techniques characteristic.
For this reason, the present invention proposes following technical scheme, to do replenishing and improving to the CN91213398.8 patent:
One,, converts power frequency supply to power supply greater than the 5KHZ frequency by rectifier, oscillator are set.Improve electric frequency, dwindle the volume and the weight of transformer greatly.Two, oscillator adopts semibridge system or monofocal or paralleling switch formula or integrated module type circuit structure, utilizes various circuit structure characteristics to improve the technical and economic peculiarities of plug-type electronic transformer (as reducing number of elements, reduce oneself power consumption, strengthen the abnormality tolerance, reducing cost etc.).Three, high frequency transformer adopts ferrite or permalloy magnetic core, promotes this Patent technology goodsization.Four, all element is installed in the insulation shell, and insulation shell can be mono-hull or a plurality of shell combination, so that various different operating occasion needs.Five, whole device directly is inserted in the supply socket by attaching plug, and electrical equipment, tool and mains supply are isolated, and guarantees the safety of using.Six, also can in insulation shell, set up the shielding inner cover as required; In internal structure, increase modules such as connecing choke, rectification, voltage stabilizing, overcurrent protection, power output adjusting, thermistor, temperature relay, further improve its technical characteristic, expand its function.
Below in conjunction with accompanying drawing one and accompanying drawing two, accompanying drawing four, accompanying drawing six, accompanying drawing eight, structure of the present invention is described.Accompanying drawing one has been showed fundamental block diagram of the present invention.
Each component names is as follows shown in the accompanying drawing one:
(1) attaching plug, (2) high frequency transformer, (3) rectifier, (4) oscillator, (6) lead-out terminal, (7) insulation shell, (13) metallic conductor.
Shown in Figure of description one, attaching plug (1), rectifier (3), oscillator (4), high frequency transformer (2), lead-out terminal (6) all are installed in the insulation shell (7).Wherein attaching plug (1) is that a pair of bullion card power supply plug (1) is connected with the input port of rectifier (3) by the pair of metal conductor.Rectifier (3) is connected with oscillator (4), the elementary connection of oscillator (4) and high frequency transformer (2).The secondary of high frequency transformer (2) is connected with the pair of metal contact that constitutes lead-out terminal (6) by the pair of metal conductor.
In said structure: the effect of attaching plug (1) is to be used for inducing one the power frequency mains supply; The effect of rectifier (3) is that the AC power that will introduce is transformed into unidirectional pulsafeeder; The effect of oscillator (4) is that the unidirectional pulsafeeder after the rectification is transformed into AC power greater than 5KHZ frequency (hereinafter to be referred as high frequency); The effect of high frequency transformer (2) is that the high-frequency ac power that oscillator (4) produces is become low safe voltage by high voltage, flows to electrical equipment, tool by lead-out terminal (6) then; The effect of insulation shell (7) is to be used for holding, to install all parts, with these parts and external isolation.Insulation shell (7) can be that single housing also can be the combination of a plurality of housings.
Accompanying drawing two, accompanying drawing four, accompanying drawing six, accompanying drawing eight have been showed the oscillator (4) based on the different circuit structures of employing of accompanying drawing one structure respectively.Oscillator in the accompanying drawing two (4) is the half bridge circuit structure; Oscillator in the accompanying drawing four (4) is a paralleling switch formula circuit structure; Oscillator in the accompanying drawing six (4) monofocal circuit structure; Oscillator in the accompanying drawing eight (4) is the integrated module type circuit structure.
Operation principle of the present invention is as follows: when being inserted in attaching plug (1) on the power frequency mains power socket, the power frequency civil power is introduced from attaching plug (1), be transformed into unidirectional pulsafeeder by rectifier (3), pass through oscillator (4) again and be transformed into AC power greater than the 5KHZ frequency, pass through high frequency transformer (2) again and be transformed into the high frequency LVPS, export to electrical equipment, tool by lead-out terminal (6).
Characteristics of the present invention: 1,, significantly reduced the volume and weight of transformer, made whole supply unit miniaturization by improving electric frequency, easy to use with carry.2, use plug directly to introduce power supply and carry out transformation, not only made things convenient for and used but also make plug lead and consuming device in addition to be in the operating on low voltage state fully, improved the security performance of consuming device from the power frequency supply socket.3, adopt the oscillator of various different circuit structures, utilize various electric circuit characteristics, improve the economic technology characteristic of whole device, expanded function of use.4, electronic circuit is operated on off state, and the energy consumption of circuit own is very little, compares with the silicon steel sheet Industrial Frequency Transformer that constitutes unshakable in one's determination, can save suitable power consumption.Owing to saved metal materials such as silicon steel sheet, reduced the manufacturing cost of product.
Economic implications of the present invention: combine the Industrial Frequency Transformer of alternative heaviness, burden, the structure of optimization electrical device with each type electric tool, electrical equipment, electric lighting, electric medical apparatus; Improve the security reliability of electrical equipment, tool; The facility that increase electrical equipment, tool carry, use; For the technical and economic peculiarities that improve electrical equipment, tool have been created the good technical prerequisite comprehensively.
Elaborate below in conjunction with a pair of accompanying drawing one of embodiment and accompanying drawing two.
Embodiment one: the structure shown in the accompanying drawing one is a basic structure of the present invention, and it has comprised the necessary structural condition of all embodiment of the present invention.Accompanying drawing two is electric principle exemplary graphs of embodiment one.
The bridge rectifier that the rectifier of embodiment one (3) is made up of high back-pressure diode in accompanying drawing two.The semibridge system oscillating circuit that the oscillator of embodiment one (4) is made up of elements such as bipolar transistor (9), switching tube exciting unit (16) and capacitor C 1, C2 in accompanying drawing two.Wherein switching tube also can be field effect transistor (MOSFET) or static induction transistor (SIT) or gated transistor (IGBT).The step-down transformer that the high frequency transformer of embodiment one (2) is made up of ferrite or permalloy magnetic core and primary and secondary coil in accompanying drawing two.Embodiment one have circuit structure simple, the balance of switching tube is required advantages such as lower.
The insulation shell of embodiment one (7) is the hollow housing of being made by engineering plastics, insulation shell detachable cover plate (12) shown in the accompanying drawing one is the part of insulation shell (7), and the attaching plug (1) of two copper cylinder formations passes its wall and is fixed in the above.Fix with securing member between insulation shell (7) and the detachable cover plate of insulation shell (12).
The lead-out terminal of embodiment one (6) is the pair of metal contact that is made of two pads.
Embodiment one is mainly used in the low tension illumination, as flow model work light, lathe lighting lamp, tungsten halogen lamp, decorative lamp etc.
Below in conjunction with two pairs of accompanying drawing three explanations of embodiment.
Embodiment two: accompanying drawing three is electric principle exemplary graphs of embodiment two, with accompanying drawing two structural similarities.The semibridge system oscillating circuit that oscillator among the embodiment two (4) is made up of elements such as gated transistor (IGBT) (10), switching tube exciting unit (16) and capacitor C 1, C2 in accompanying drawing three.Embodiment two except have with embodiment one same characteristics, it also between attaching plug (1) and rectifier (2), be connected in series current-limiting resistance (23) with reduce high order harmonic component to the impact of electrical network, it also has been connected in series pumping signal adjuster (26) below switching tube exciting unit (16), electric current and the power output of utilizing the method for by-pass cock pipe pumping signal power to come the by-pass cock pipe.
Electric lighting, electric heater, medical apparatus and small-sized electric instrument etc. that embodiment two is applied to need to regulate power output are located.
Below in conjunction with three pairs of accompanying drawing four explanations of embodiment.
Embodiment three: accompanying drawing four is electric principle exemplary graphs of embodiment three.The oscillator of embodiment three (4) in accompanying drawing four by the paralleling switch formula oscillating circuit of forming such as elementary of reverse conduction triode thyristor (RCT) (14), controllable silicon trigger element (17), inductance L, capacitor C 3 and high frequency transformer.Wherein switching tube can be that reverse conduction triode thyristor also can be gate turn-off thyristor (GTO) or asymmetric controllable silicon (ASCR).
That embodiment three has is simple in structure, oneself power consumption is low, it is more high-power to export, to advantages such as the instantaneous large-current tolerance are strong.
Embodiment three is applied to electric tool, small household appliances, electric lighting etc. and locates.
Below in conjunction with four pairs of accompanying drawing five explanations of embodiment.
Embodiment four: accompanying drawing five is the electric principle exemplary graph of embodiment four, and is similar to accompanying drawing four.Oscillator among the embodiment four (4) structure is identical with embodiment three.Embodiment four has been connected in series choke (22) with the influence of restriction high order harmonic component to electrical network between attaching plug (1) and rectifier (3); it has increased induction by current coil (20) and overcurrent, Overvoltage protecting unit (19) again in addition; when curtage surpasses limit value; overcurrent, Overvoltage protecting unit (19) provide a drive signal; make the controllable silicon SCR conducting; the gate voltage of reverse conduction triode thyristor (RCT) (14) reduces to zero, and whole device quits work.Embodiment three also stops (7) inside and has set up screen (15) at insulation shell, significantly reduced the high frequency width of cloth in space is penetrated.
Embodiment four makes the utility model increase self-protection ability, more practicability.
Below in conjunction with five pairs of accompanying drawing six explanations of embodiment.
Embodiment five: accompanying drawing six is electric principle exemplary graphs of embodiment five.The normal shock monofocal oscillating circuit that the oscillator of embodiment five (4) is made up of electrostatic induction device (SIT) (11), switching tube exciting unit (16), rectifying tube D, high frequency transformer (2) etc. in accompanying drawing six.Embodiment is five simple in structure, cost is low, and does not have problems such as common-mode conducting, load effect, and reliability is higher.Embodiment five is mainly used in electric tool.
Below in conjunction with six pairs of accompanying drawing seven explanations of embodiment.
Embodiment six: accompanying drawing seven is electric principle exemplary graphs of embodiment six.
The anti-sharp monofocal oscillating circuit that the oscillator of embodiment six (4) is made up of bipolar transistor (9), switching tube exciting unit (16), high frequency transformer (2), rectifying tube D etc. in accompanying drawing seven.Embodiment six is with embodiment five differences: embodiment six is two groups of oscillators-high frequency transformer parallel runnings, the output of stack power.Be characterized in: use the in parallel exportable two times power of switching tube of low capacity, ratio of performance to price height.In addition, the electric voltage frequency that is added in rectifying tube D two ends also is doubled, and helps the filtering of next stage.In addition, embodiment six also has been connected in series posistor (24) and temperature relay (25) between attaching plug (1) and rectifier (3), and the sensible heat element of temperature relay is installed on the fin of switching tube.Energy volitional check input current when current overload, limit dissipation power.When temperature rise surpasses limit value, can cut off the electricity supply automatically, whole device is shielded.Embodiment six is useful for the electrical device that power reaches the environment for use difference more greatly, electric lighting, electric tool.
Below in conjunction with seven pairs of accompanying drawing eight explanations of embodiment.
Embodiment seven: accompanying drawing eight is electric principle exemplary graphs of embodiment seven.The vibration of embodiment seven (4) instead swashs the monofocal oscillating circuit by what integration module (power switch IC) (5) and saw-toothed wave generator (21), high frequency transformer (2) (double as energy-storage travelling wave tube), rectifying tube D formed in accompanying drawing eight.Integration module among the embodiment seven (power switch IC) (5) is made in switching tube and switching tube drive system (18), overcurrent, overvoltage protective system (27) on the base plate; realized that switching device is integrated; this not only makes whole device reliability improve; volume further dwindles, but also helps producing in enormous quantities and reducing manufacturing cost.Switching tube in the integration module of embodiment seven (power switch IC) (5) can be bipolar transistor (BJT), field boundary effect pipe (MOSFET), gated transistor (IGBT), gate turn-off thyristor (GTO), electrostatic induction device (SIT).Switching tube in accompanying drawing eight is a field effect transistor (MOSFET) (8).
Embodiment seven has created wide prospect for Application and Development of the present utility model.
Each component names is as follows shown in accompanying drawing one, accompanying drawing two, accompanying drawing three, accompanying drawing four, accompanying drawing five, accompanying drawing six, accompanying drawing seven, the accompanying drawing eight:
(1) attaching plug; (2) high frequency transformer; (3) rectifier, (4) oscillator, (5) integration module (power switch IC); (6) lead-out terminal; (7) insulation shell, (8) field effect transistor (MOSFET), (9) bipolar transistor; (10) gated transistor (IGBT); (11) electrostatic induction device (SIT), the detachable cover plate of (12) insulation shell, (13) metallic conductor; (14) reverse conduction triode thyristor (RCT); (15) screen, (16) switching tube exciting unit, (17) controllable silicon trigger element; (18) IC switching tube drive system; (19) overcurrent; Overvoltage protecting unit, (20) induction by current coil, (21) sawtooth signal generator; (22) choke; (23) current-limiting resistance, (24) posistor, (25) temperature relay; (26) pumping signal adjuster, (27) IC overcurrent; overvoltage protective system.
Claims (7)
1, plug-type electronic transformer, it is characterized in that: form by attaching plug (1), high frequency transformer (2), rectifier (3), oscillator (4), lead-out terminal (6), insulation shell (7), attaching plug (1) is connected with rectifier (3) by the pair of metal conductor, rectifier (3), oscillator (4), high frequency transformer (2) link successively, and the secondary and lead-out terminal (6) of high frequency transformer (2) links.
It is characterized in that: the circuit structure of oscillator (4) is semibridge system or monofocal or paralleling switch formula or integrated module type structure; The step-down transformer that high frequency transformer (2) is made up of primary coil, secondary coil, ferrite or permalloy magnetic core.
It is characterized in that: above device is installed in the insulation shell (7), the power frequency supply of being introduced by attaching plug (1) is transformed into the power supply greater than the 5KHZ frequency after through rectifier (3), oscillator (4), by high frequency transformer (2) voltage transition is become safe voltage, exports by lead-out terminal (6) at last again.
2, plug-type electronic transformer as claimed in claim 1 is characterized in that: said attaching plug (1) is meant metal insert two bar shapeds separated from each other or concentric ring type.
3, plug-type electronic transformer as claimed in claim 1 is characterized in that: said lead-out terminal (6) is meant the electric power delivery outlet that is made of the pair of metal contact.
4, plug-type electronic transformer as claimed in claim 1, it is characterized in that: said insulation shell (7) is meant by what insulating material constituted and is used to hold the hollow housing of installing all devices, can be that single housing also can be a plurality of shell combination, as in insulation shell (7), setting up the radome of metal or conductive plastics system, then will significantly reduce of the high frequency radiation of insulation shell (7) internal electronic device to surrounding space.
5, plug-type electronic transformer as claimed in claim 1; it is characterized in that: if high frequency transformer (2) secondary with lead-out terminal (6) between be connected in series again a function expanding module such as rectification, voltage stabilizing, regularly, overcurrent protection; circuit such as overvoltage protection; lead-out terminal (6) just can export different wave, different voltages electric power, can realize protection to abnormality, the function of plug-type electronic transformer is further expanded.
6, plug-type electronic transformer as claimed in claim 1 is characterized in that: if the excitation end serial connection of the electronic switching device of oscillator (4) or and connect a pumping signal adjuster (26), just can increase the function of regulating electromotive power output.
7, plug-type electronic transformer as claimed in claim 1 is characterized in that: if be connected in series a temperature relay (25) or thermistor (24) between attaching plug (1) and rectifier (3), just can increase the temperature rise defencive function; If between attaching plug (1) and rectifier (3), be connected in series choke or resistance, just can reduce the influence of high-frequency current to electrical network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107672 CN1079848A (en) | 1992-08-04 | 1992-08-04 | Plug-type electronic transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107672 CN1079848A (en) | 1992-08-04 | 1992-08-04 | Plug-type electronic transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1079848A true CN1079848A (en) | 1993-12-22 |
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ID=4942995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92107672 Pending CN1079848A (en) | 1992-08-04 | 1992-08-04 | Plug-type electronic transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1079848A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108743003A (en) * | 2018-08-29 | 2018-11-06 | 好产品有限公司 | Hot-air therapeutic apparatus |
-
1992
- 1992-08-04 CN CN 92107672 patent/CN1079848A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108743003A (en) * | 2018-08-29 | 2018-11-06 | 好产品有限公司 | Hot-air therapeutic apparatus |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |