CN105356761A - Boost and protection device of auto transformer - Google Patents
Boost and protection device of auto transformer Download PDFInfo
- Publication number
- CN105356761A CN105356761A CN201510920196.0A CN201510920196A CN105356761A CN 105356761 A CN105356761 A CN 105356761A CN 201510920196 A CN201510920196 A CN 201510920196A CN 105356761 A CN105356761 A CN 105356761A
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- China
- Prior art keywords
- autotransformer
- terminal
- boosting
- main coil
- voltage
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
- H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
- H02H7/055—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers for tapped transformers or tap-changing means thereof
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
A boost and protection device of an auto transformer relates to a voltage rise and protection device. According to a boost circuit, the fire wire and the zero line of a 220V AC power supply are respectively connected to a fire wire terminal and a zero line terminal, the fire wire terminal is sequentially connected with a power supply switch and an input fuse tube in series and then is connected to a tap of the auto transformer B, one end of a main coil of the auto transformer is connected with one end of an output fuse tube, the other end of the output fuse tube is connected with a load voltage output terminal, the zero line terminal is connected with the other end of the main coil, the other end of the main coil is connected with another load voltage output terminal, and a voltmeter is connected in series between the two load voltage output terminals. The boost circuit is disposed in a box body, a movable contact a is disposed on a hand-held rotating column, the hand-held rotating column can be rotationally disposed on the box body, and the box body is provided with a voltage indication dial and a boost limit mechanism. The boost and protection device adopts the auto transformer to achieve a voltage rise and performs limit protection of the voltage rise, and has the advantages of less investment, high practicality and the like.
Description
Technical field
The present invention relates to boost in voltage device, particularly adopt boosting and the boosting protective device thereof of autotransformer.
Background technology
Autotransformer is in same capacity, because it is small and exquisite, light, operate the advantages such as simple and easy, voltage continuously adjustabe, very popular, is adopted by many instrument and meters and circuit debugging.Traditionally, people use autotransformer usually as reducing transformer.
Fig. 1 shows the circuit structure that autotransformer B uses as reducing transformer, in figure AC power U1 (being generally 220V) from 1., 2. terminal input, be connected with the former limit A-X of B respectively through K switch, protective tube BX; Secondary a-the x of B through 3., 4. terminal output loading voltage U 2.
In FIG, zero terminal X and the x on former and deputy limit is all a line, one of the feature of this autotransformer just.The armature contact a be connected with output fire line terminal slides through mechanical adjustment, changes adjustable coil number of turn Wt, and Wt numerical value is different, and gained no-load voltage ratio K value is different, therefore output voltage U2 numerical value is different.Again because secondary number of turn Wt can only regulate, so there is following relation in the scope of former limit main coil number of turn Wz:
Wt→U2≤Wz→U1,
That is: K=U2/U1≤1
As can be seen here, this circuit form shows that the secondary voltage that autotransformer B exports can only be equal to or less than original edge voltage.
In Fig. 1 circuit, resistance R and luminous tube Fg(refers to light-emitting diode) series connection is as work instruction, and the bright expression of lamp is normal.The footnote letter of another former secondary coil W and need not numeral, be more can embody function and with describe below unified.
From the above analysis, if be used in the circuit of boosted voltage by autotransformer, then the voltage that lies dormant unrestrictedly raises and the danger of damage equipment.
Summary of the invention
The object of this invention is to provide one and autotransformer is used for boosted voltage, boosted voltage is carried out to the protective device of safety restriction simultaneously.
The object of the present invention is achieved like this: a kind of boosting of autotransformer and protective device, comprise the autotransformer B of band tap, comprise booster circuit: the live wire of 220V AC power and zero line are connected to fire line terminal and zero terminal respectively, this fire line terminal is connected in series mains switch K in turn, the tap of described autotransformer B is connected to after input protective tube BX1, one end A of the main coil AX of autotransformer B is connected to export insurance pipe BX2 one end, the export insurance pipe BX2 other end is connected to a load voltage lead-out terminal, zero terminal is connected to the other end X of the main coil AX of autotransformer B through wire, the other end X of this main coil AX is connected to another load voltage lead-out terminal through wire, voltmeter V is serially connected between these two load voltage lead-out terminals, above-mentioned booster circuit is arranged on the circuit board in casing, what armature contact a was arranged on isolation material holds in Rotational Cylindrical, tap on the main coil AX of above-mentioned autotransformer B is multiple, and form the multiple tapping contacts contacting connection with armature contact a one by one, this is held Rotational Cylindrical and is arranged on rotationally on the panel of casing, this cabinet panel is provided with voltage indication dial disc, and cabinet panel is provided with boosting position-limit mechanism.
Described boosting position-limit mechanism is: described cabinet panel is provided with one or two limited post, described in hold correspondence in Rotational Cylindrical and be fixed with one or two extension rods.
Also there is input power observation circuit: resistance R1 mono-end is connected to the input protective tube BX1 other end, after resistance R1 other end serial connection input power indication light diode Fg1, be connected to zero terminal; Also there is load voltage observation circuit: another resistance R2 mono-end is connected to export insurance pipe BX2 one end, after another resistance R2 other end serial connection load current indication light diode Fg2, be connected to zero terminal.
Described limited post is arranged in the arc-shaped slot on cabinet panel.
Described casing is cuboid, cabinet panel is provided with voltmeter V, described mains switch K input power indication light diode Fg1, load current indication light diode Fg2, input protective tube BX1, export insurance pipe BX2 are installed on the front side riser of casing.
The invention has the beneficial effects as follows:
This patent according to instrument test and network voltage too low, self-coupling how is utilized to become the requirement doing voltage lifting, carry out the adjustment that input and output voltage, coil turn and machine operation are reverse, simultaneously for occurring the problem that overvoltage affects, carry out setting up the mode such as voltmeter, two-way insurance, two-way photoelectric monitor, adjustable limiting post as system prevention process, achieve good results, both met voltage and promoted needs, fully ensured security reliability again.
Employing this patent is the needs of experiment power supply.
In numerous monitoring, control instrument, its technical specification often has " working power: 220V ± 10 ﹪ " one, by convention, do experiment checking time, must expanded scope, guarantee is written, disclosed index, and to this, we generally will accomplish about 280V.280V is do not have such instrument sales on the market, if tailor-made, then costly, the cycle is long, and uses single.For this reason, except bulk article, outside long-term needs, should not take.
This instrument utilizes existing resource to carry out Curve guide impeller, invests little, practical, is worthy of popularization.。
Accompanying drawing explanation
Fig. 1 is the reduction regulation circuit diagram of existing employing autotransformer.
Fig. 2 is the boosting regulating circuit figure that this device adopts autotransformer.
Fig. 3 is the profile schematic perspective view of this device.
Embodiment
Fig. 2, Fig. 3 illustrates boosting and the protective device of this autotransformer, comprise the autotransformer B of band tap, comprise booster circuit: the live wire of 220V AC power and zero line are connected to fire line terminal and zero terminal respectively, this fire line terminal is connected in series mains switch K in turn, the tap of described autotransformer B is connected to after input protective tube BX1, one end A of the main coil AX of autotransformer B is connected to export insurance pipe BX2 one end, the export insurance pipe BX2 other end is connected to a load voltage lead-out terminal, zero terminal is connected to the other end X of the main coil AX of autotransformer B through wire, the other end X of this main coil AX is connected to another load voltage lead-out terminal through wire, voltmeter V is serially connected between these two load voltage lead-out terminals, above-mentioned booster circuit is arranged on the circuit board in casing, what armature contact a was arranged on isolation material holds in Rotational Cylindrical 10, tap on the main coil AX of above-mentioned autotransformer B is multiple, and form the multiple tapping contacts contacting connection with armature contact a one by one, multiple tapping contacts is distributed in a barrel circumferentially, and the armature contact a held in Rotational Cylindrical contacts one by one with tapping contacts.This is held Rotational Cylindrical 10 and is arranged on rotationally on the panel of casing, this cabinet panel is provided with voltage indication dial disc 9, and cabinet panel is provided with boosting position-limit mechanism.
Also there is input power observation circuit: resistance R1 mono-end is connected to the input protective tube BX1 other end, after resistance R1 other end serial connection input power indication light diode Fg1, be connected to zero terminal; Also there is load voltage observation circuit: another resistance R2 mono-end is connected to export insurance pipe BX2 one end, after another resistance R2 other end serial connection load current indication light diode Fg2, be connected to zero terminal.
Boosting position-limit mechanism is: described cabinet panel is provided with one or two limited post 7, described in hold in Rotational Cylindrical 10 and be fixed with one or two extension rods 8 along the radial correspondence of its cross section.
Limited post 7 is arranged on (limited post is arranged in arc-shaped slot movably) in the arc-shaped slot on cabinet panel.
Casing is cuboid, cabinet panel is provided with voltmeter V, described mains switch K input power indication light diode Fg1, load current indication light diode Fg2, input protective tube BX1, export insurance pipe BX2 are installed on the front side riser of casing.
Fig. 2 and Fig. 1 is compared visible, variac and autotransformer B main body do not become, but be inverted at input, output voltage, namely AC power U1 (as 220V) through mains switch K, input protective tube BX1 from 3., 4. terminal input, send the regulating winding a-x of B to, become former limit.Have multiple tapping contacts between main coil A-X(A-X that now self-coupling becomes B) then become secondary, through export insurance pipe BX2,1., 2. terminal output loading voltage U 2.
Zero terminal X and the x on the former and deputy limit in Fig. 2 is still all a line, and 3. input fire line terminal slides through mechanical adjustment, changes adjustable coil number of turn Wt, the difference of Wt numerical value, and gained no-load voltage ratio K is different, therefore output voltage U2 is different.Because of secondary main coil Wz connection is the highest number of turn, has following relation between its input voltage U1 and output voltage U2 and no-load voltage ratio:
Wz→U2≥Wt→U1,
That is: K=U2/U1 >=1
As can be seen here, this circuit shows that secondary voltage that autotransformer B exports can only be equal to or greater than the original edge voltage of input, namely becomes step-up transformer.
Protection system
We see that the relation between coil, voltage, no-load voltage ratio has again:
K＝Wz/Wt
In mechanical adjustment, along with turning clockwise, regulating winding number of turn Wt gradually reduces, and because input voltage U1 is substantially constant, then each circle voltage will increase relatively, from point of theory, likely occur Wt → 0, then have no-load voltage ratio K → ∞, and as K → ∞, have:
Wz/Wt＝U2/U1＝(U2→∞)/220＝K→∞
Namely U2 is forced to tend to infinitely great (measured value exceedes kilovolt).This is danger close, load is burnt after may there is front damage power supply, and learn through experiment, pressure regulation becomes this in more than after 350V, just starts vibration, send roar, voltage is higher, and sound is larger, and progressively generates heat after higher than 400V, spread out of empyreumatic taste, the insulating barrier namely in coil is subject to roasting burning and damage.
For overcoming the above problems, we take following series of measures:
1., the 2. voltage U 2 that exports of terminal the first, before energising, the Rotational Cylindrical of band armature contact a need be rotated and be placed on highest point hold co-located with the A of main coil A-X, at this moment, K switch is closed, and, also only meeting is substantially identical with U1.Otherwise armature contact a is placed on a contact on other position and A-X, be even placed on the zero line side (being namely in contact with it) of contrary X-x end, will 1., 2. terminal export very large or even extreme value U2, be breakneck.
The second, be designed with 1000 volts of voltmeter V in circuit, this table is as the supervision to output voltage U2.This setting is exceptionally important, because having data observation in adjustment boosting, becomes initiatively, away from blindness by passive.
3rd, according to front analysis, there is the possibility of U2 → ∞ in theory, because of coil turn change, one turn voltage value changes, occur non-linear relation between U2 and U1, the parameter of each producer manufacture is different in addition, so, numerical value can not be determined in circular arc ratio, preferably by actual measurement mark method, (as rear Fig. 3) record and the upper key data of stickup, make it grasp regulative mode and stop adjusted position.
4th, by repeatedly application verification, after substantially determining desired location, we can as 7 in Fig. 3,8 indications, be symmetrical arranged limited post and extension rod, when pressure regulation change handle forwards this place to, will be blocked, can not rotate again, avoid voltage to tune too large thus, scaling loss equipment.
In Fig. 2 circuit, for the purpose of stricter, we have also established two photoelectric monitor branch roads, and wherein power supply monitoring is done in resistance R1 and luminous tube Fg1 series connection, and load monitoring is done in resistance R2 and luminous tube Fg2 series connection.After energising, the bright expression of lamp is normal, otherwise represents that difference has problem, needs maintenance and inspection.
Pressure regulation becomes assembling and uses
After pressure regulation change being installed according to Fig. 2 circuit, we are again by loading casing 14 total for each components and parts, and so both safety, forms again normative instrument.
In Fig. 3,1 is mains switch (K); 2 is power supply indicator (i.e. Fg1); 3 is load indicator light (i.e. Fg2); 4 is inputs insurance (BX1), and 5 is export insurance (BX2); 6 is (limited post) arc-shaped slots, the limited post 7 of fastening nuts can be unclamped, move in groove, changes limiting voltage position and numerical value; 8 is extension rods, both does value pointer when rotated, when lengthening expenditure partial turn to about 300V (safe voltage higher limit) simultaneously, hit two symmetrical limited posts 7, then stop, no longer boost, strengthen the protection to load, power supply and pressure regulation change self thus; 9 is voltage indication dial discs; 10 is hold Rotational Cylindrical (isolation material), is be rotated counterclockwise in this boosting uses; 11 is that experimentally test data labelled, and outer row word is then input 220V normal value, needs to rise to nearly 300V, so that the label that instrumentation table meter is done experiment; 12 is voltmeter (V), and 13 is power lines.
By tune output voltage U2, below, plate draws through two cores and three core sockets respectively and connects use.
Claims (5)
1. the boosting of an autotransformer and protective device, comprise, with the autotransformer B of tap, it is characterized in that, comprise booster circuit: the live wire of 220V AC power and zero line are connected to fire line terminal and zero terminal respectively, this fire line terminal is connected in series mains switch K in turn, the tap of described autotransformer B is connected to after input protective tube BX1, one end A of the main coil AX of autotransformer B is connected to export insurance pipe BX2 one end, the export insurance pipe BX2 other end is connected to a load voltage lead-out terminal, zero terminal is connected to the other end X of the main coil AX of autotransformer B through wire, the other end X of this main coil AX is connected to another load voltage lead-out terminal through wire, voltmeter V is serially connected between these two load voltage lead-out terminals, above-mentioned booster circuit is arranged on the circuit board in casing, what armature contact a was arranged on isolation material holds in Rotational Cylindrical (10), tap on the main coil AX of above-mentioned autotransformer B is multiple, and form the multiple tapping contacts contacting connection with armature contact a one by one, this is held Rotational Cylindrical (10) and is arranged on rotationally on the panel of casing, this cabinet panel is provided with voltage indication dial disc (9), and cabinet panel is provided with boosting position-limit mechanism.
2. the boosting of autotransformer according to claim 1 and protective device; it is characterized in that; described boosting position-limit mechanism is: described cabinet panel is provided with one or two limited post (7), described in hold the upper correspondence of Rotational Cylindrical (10) and be fixed with one or two extension rods (8).
3. the boosting of autotransformer according to claim 1 and 2 and protective device, it is characterized in that, also there is input power observation circuit: resistance R1 mono-end is connected to the input protective tube BX1 other end, after resistance R1 other end serial connection input power indication light diode Fg1, be connected to zero terminal; Also there is load voltage observation circuit: another resistance R2 mono-end is connected to export insurance pipe BX2 one end, after another resistance R2 other end serial connection load current indication light diode Fg2, be connected to zero terminal.
4. the boosting of autotransformer according to claim 3 and protective device, it is characterized in that, described limited post (7) is arranged in the arc-shaped slot on cabinet panel.
5. the boosting of autotransformer according to claim 4 and protective device; it is characterized in that; described casing is cuboid; cabinet panel is provided with voltmeter V, described mains switch K input power indication light diode Fg1, load current indication light diode Fg2, input protective tube BX1, export insurance pipe BX2 are installed on the front side riser of casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510920196.0A CN105356761A (en) | 2015-12-11 | 2015-12-11 | Boost and protection device of auto transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510920196.0A CN105356761A (en) | 2015-12-11 | 2015-12-11 | Boost and protection device of auto transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105356761A true CN105356761A (en) | 2016-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510920196.0A Pending CN105356761A (en) | 2015-12-11 | 2015-12-11 | Boost and protection device of auto transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105356761A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546989A (en) * | 2008-03-26 | 2009-09-30 | 深圳市研通高频技术有限公司 | Variable attenuator |
| US20130119950A1 (en) * | 2011-11-14 | 2013-05-16 | Robert J. Nelson | Power line autotransformer series compensator |
| CN103836585A (en) * | 2012-11-20 | 2014-06-04 | 张树兰 | Neon lamp transformer |
| CN203761023U (en) * | 2014-03-25 | 2014-08-06 | 袁玉英 | Low voltage electric appliance's thyristor protection apparatus |
| JP2015186273A (en) * | 2014-03-20 | 2015-10-22 | 株式会社ダイヘン | Distribution line voltage regulating device |
| CN205232036U (en) * | 2015-12-11 | 2016-05-11 | 国网四川省电力公司电力科学研究院 | Auto transformer's steps up and protection device |
-
2015
- 2015-12-11 CN CN201510920196.0A patent/CN105356761A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546989A (en) * | 2008-03-26 | 2009-09-30 | 深圳市研通高频技术有限公司 | Variable attenuator |
| US20130119950A1 (en) * | 2011-11-14 | 2013-05-16 | Robert J. Nelson | Power line autotransformer series compensator |
| CN103836585A (en) * | 2012-11-20 | 2014-06-04 | 张树兰 | Neon lamp transformer |
| JP2015186273A (en) * | 2014-03-20 | 2015-10-22 | 株式会社ダイヘン | Distribution line voltage regulating device |
| CN203761023U (en) * | 2014-03-25 | 2014-08-06 | 袁玉英 | Low voltage electric appliance's thyristor protection apparatus |
| CN205232036U (en) * | 2015-12-11 | 2016-05-11 | 国网四川省电力公司电力科学研究院 | Auto transformer's steps up and protection device |
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Application publication date: 20160224 |
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