CN205230786U - Power transformer with short-circuit protection function - Google Patents
Power transformer with short-circuit protection function Download PDFInfo
- Publication number
- CN205230786U CN205230786U CN201520926971.9U CN201520926971U CN205230786U CN 205230786 U CN205230786 U CN 205230786U CN 201520926971 U CN201520926971 U CN 201520926971U CN 205230786 U CN205230786 U CN 205230786U
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- short
- sheet metal
- circuit
- toroidal transformer
- transformer
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- 239000002184 metal Substances 0.000 claims abstract description 95
- 229910052751 metal Inorganic materials 0.000 claims abstract description 95
- 230000001012 protector Effects 0.000 claims abstract description 24
- 238000004804 winding Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 20
- 230000000694 effects Effects 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000013024 troubleshooting Methods 0.000 claims description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a power transformer with short circuit protection function, which comprises a shell, a ring transformer arranged in the shell and provided with an input lead and an output lead, a plug electrically connected with the input lead, a socket electrically connected with the output lead, and a control switch; the toroidal transformer comprises an iron core, a primary winding, a secondary winding, an input end lead wire, an output end lead wire and a short-circuit protector which is connected in series with the input end lead wire and can break the toroidal transformer when short circuit occurs so as to play a role in protection; the short-circuit protector comprises a high-resistance metal sheet which is electrically connected to the input end lead through a contact, can deform and separate from the contact when heated and heated, and has a switching function of short-circuit protection; the PTC device can be heated when the metal sheet is in open circuit and stops working when the metal sheet is electrified, thereby effectively preventing the metal sheet from working repeatedly during short circuit.
Description
Technical field
The utility model relates to transformer technology field, particularly a kind of power transformer with short-circuit protection function.
Background technology
Power transformer is widely used in import household electrical appliance, in the various places such as family, office, business.Power transformer inside is generally provided with toroidal transformer.Present toroidal transformer major part only has temperature protector, plays a protective role and slow in reacting when only raising product abnormal temperature.For electric current excessive during short circuit, the temperature rise of product also has little time to be delivered to temperature protector, and product has just damaged or burnt.Also deformable sheet metal is provided with in existing portion temperature protector, but such sheet metal is equivalent to the effect of regular tap in circuit, be short-circuited and electric current is excessive time, the caloric value of the sheet metal in existing short-circuit protector self is less, only sheet metal makes sheet metal be heated by relying on peripheral devices to send out because of super-high-current heat thermogenetic to be delivered to and heat up thereupon, just can deform after the intensification of being heated of long period and be separated from contact, circuit just can be converted to off state, be short-circuited with to convert the time that open circuit consumes to longer, be difficult to play in time effective short-circuit protection rapidly to toroidal transformer and load thereof.
Therefore, how to realize one and have short-circuit protection function, and short-circuit protection is rapid in time, simple and reasonable power transformer is technical problem urgently to be resolved hurrily in the industry.
Summary of the invention
Main purpose of the present utility model is to provide a kind of power transformer with short-circuit protection function; be intended to that there is temperature protection and overcurrent protection simultaneously; realize one and there is short-circuit protection function, and short-circuit protection is rapid in time, simple and reasonable power transformer.
The utility model proposes a kind of power transformer with short-circuit protection function, comprise housing, be located at enclosure interior and the toroidal transformer gone between with output with input lead-in wire, with input go between be electrically connected plug, be embedded on housing and go between the socket be electrically connected, the control switch be located on housing with output, toroidal transformer is fixed in housing by fixed structure peace, fixed structure comprise be fixedly arranged on housing inner bottom part and pad be located at toroidal transformer lower surface the lower rubber cushion with insulation and cushioning effect, be fixedly arranged on toroidal transformer upper surface having insulation and the upper rubber cushion of cushioning effect, also comprise upper rubber cushion, toroidal transformer, lower rubber cushion to be pressed solidly to lock and be fixed to housing press solidly connector, toroidal transformer comprises iron core, armature winding, secondary winding, input lead-in wire, output lead-in wire, also comprises and is series on input lead-in wire and can makes toroidal transformer open circuit when being short-circuited thus the short-circuit protector played a protective role, short-circuit protector comprises when being heated intensification and the self-heating that are electrically connected on input lead-in wire by contact are heated up and can deform and be separated from contact thus have the high value sheet metal of the switching function of short-circuit protection, and electric current excessive when being short-circuited makes be heated intensification and self fast heating of the sheet metal of high value heat up and distortion thus be separated from contact and input gone between open circuit occurs and then makes toroidal transformer rapid translating be off state, sheet metal two ends be parallel with start work when sheet metal open circuit and when sheet metal is energized during out-of-work work heatable thus effectively make sheet metal in short circuit time not resilience and the PTC device that is in off state and then avoids sheet metal repeatedly to work, PTC device startup work during open circuit is also generated heat, the heat sent to be delivered on sheet metal and sheet metal to be heated heat up and distortion thus make sheet metal keep distortion and off state, until trouble shooting and when being again energized PTC device quit work, make sheet metal Temperature fall and resile and be energized with contact thus make toroidal transformer continue normally to work.
Preferably, short-circuit protector is fixed on the lateral surface of toroidal transformer.
Preferably, housing by can mutually split and be connected by screw fixing upper casing, lower casing forms.
The utility model toroidal transformer simple and reasonable; input lead-in wire is connected into making toroidal transformer open circuit when being short-circuited thus the short-circuit protector played a protective role, and short-circuit protector comprises when being heated intensification and the self-heating that are electrically connected on input lead-in wire by contact are heated up and can deform and be separated from contact thus have the high value sheet metal of the switching function of short-circuit protection.When being short-circuited, excessive electric current makes device heating heat up, especially the sheet metal of high value, excessive electric current makes the metal of high value self heating up rapidly and distortion thus be separated from contact and input gone between open circuit and then make toroidal transformer rapid translating be off state occurs, simultaneously, the heat of other devices also can be delivered on sheet metal, sheet metal is heated intensification, contribute to temperature increase speed and the deformation velocity of accelerating sheet metal, like this simple and reasonable, this short-circuit protector just can carry out short-circuit protection timely and effectively to the load of toroidal transformer and output.Visible; the resistance of sheet metal is high; when short circuit; can be heated up by the mode of external heat transfer or be heated up by self-heating; quickly, after being namely short-circuited, sheet metal can promptly elevated temperature deformation thus be separated from contact in time for programming rate; get final product open circuit in the very first time, protect the load of toroidal transformer and output lead-in wire to the full extent.In addition, the sheet metal of high value is very responsive to electric current, and electric current is once excessive, and the induction of sheet metal is very rapid, and heating also can be out of shape in time thus be separated from contact and make circuit breaker rapidly, and short-circuit protection is rapid in time.In addition, sheet metal two ends be parallel with start work when sheet metal open circuit and when sheet metal is energized during out-of-work work heatable thus effectively make sheet metal in short circuit time not resilience and the PTC device that is in off state and then avoids sheet metal repeatedly to work.PTC device startup work during open circuit is also generated heat, and the heat sent to be delivered on sheet metal and sheet metal to be heated heat up and distortion thus make sheet metal keep distortion and off state.Until trouble shooting and when being again energized PTC device quit work, make sheet metal Temperature fall and resile and be energized with contact thus make toroidal transformer continue normally to work.PTC device can effectively prevent sheet metal from repeatedly working when short circuit.The utility model achieves one and has short-circuit protection function, and short-circuit protection is rapid in time, simple and reasonable power transformer.
Accompanying drawing explanation
Fig. 1 is a kind of Facad structure schematic diagram with an embodiment of the power transformer of short-circuit protection function of the utility model;
Fig. 2 is a kind of internal structure schematic diagram with an embodiment of the power transformer of short-circuit protection function of the utility model;
Fig. 3 is a kind of electric circuit construction schematic diagram with short-circuit protector in an embodiment of the power transformer of short-circuit protection function of the utility model.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Referring to figs. 1 through Fig. 3; propose a kind of embodiment with the power transformer of short-circuit protection function of the present utility model, comprise housing, be located at enclosure interior and with input lead-in wire 101 and output go between 102 toroidal transformer 100,101 plugs be electrically connected 203 that to go between with input, be embedded on housing and go between 102 sockets be electrically connected 204, the control switch 205 be located on housing with output.Power transformer is widely used in the various places such as family, office, business.
Toroidal transformer 100 is fixed in housing by fixed structure peace, fixed structure comprise be fixedly arranged on housing inner bottom part and pad be located at toroidal transformer 100 lower surface the lower rubber cushion with insulation and cushioning effect, be fixedly arranged on toroidal transformer 100 upper surface having insulation and the upper rubber cushion 401 of cushioning effect, also comprise upper rubber cushion 401, toroidal transformer 100, lower rubber cushion to be pressed solidly to lock and be fixed to housing press solidly connector 402.
Wherein, housing by can mutually split and be connected by screw fixing upper casing 201, lower casing 202 forms.Housing is provided with louvre.
Toroidal transformer 100 comprises iron core, armature winding, secondary winding, input lead-in wire 101, output lead-in wire 102, also comprises and is series on input lead-in wire 101 and can makes toroidal transformer 100 open circuit when being short-circuited thus the short-circuit protector played a protective role.Short-circuit protector is fixed on the lateral surface of toroidal transformer 100.
Short-circuit protector comprises when being heated intensification and the self-heating that are electrically connected on input lead-in wire 101 by contact are heated up and can deform and be separated from contact thus have the high value sheet metal 301 of the switching function of short-circuit protection, the sheet metal 301 of high value has current sense characteristic and temperature sensitive properties simultaneously, make short-circuit protector have temperature protection and overcurrent protection concurrently simultaneously, when being short-circuited, excessive electric current makes device heating heat up, especially the sheet metal 301 of high value, excessive electric current makes the metal of high value self heating up rapidly and distortion thus be separated from contact and input gone between 101 open circuits and then make toroidal transformer 100 rapid translating be off state occur, simultaneously, the heat of other devices also can be delivered on sheet metal 301, sheet metal 301 is heated intensification, contribute to temperature increase speed and the deformation velocity of accelerating sheet metal 301.The sheet metal 301 of this high value can when peripheral devices abnormal temperature be too high; contact is separated from by outer thermal impact deforms; realize the temperature sensitive properties that namely temperature protection embodies high value sheet metal 301; simultaneously again can electric current in circuit excessive time; self-heating deforms fast and is separated from contact; realize the current sense characteristic that namely short-circuit protection embodies high value sheet metal 301; like this simple and reasonable, this short-circuit protector just can carry out short-circuit protection timely and effectively to the load of toroidal transformer 100 and output.Visible; the resistance of sheet metal 301 is high; when short circuit; can be heated up by the mode of external heat transfer or be heated up by self-heating; quickly, after being namely short-circuited, sheet metal 301 can promptly elevated temperature deformation thus be separated from contact in time for programming rate; get final product open circuit in the very first time, protect the load of toroidal transformer 100 and output lead-in wire 102 to the full extent.In addition, sheet metal 301 pairs of electric currents of high value are very responsive, and electric current is once excessive, and the induction of sheet metal 301 is very rapid, and heating also can be out of shape in time thus be separated from contact and make circuit breaker rapidly, and short-circuit protection is rapid in time.
In addition, sheet metal 301 two ends be parallel with start work when sheet metal 301 open circuit and when sheet metal 301 is energized during out-of-work work heatable thus effectively make sheet metal 301 in short circuit time not resilience and the PTC device 302 that is in off state and then avoids sheet metal repeatedly to work.During open circuit, PTC device 302 starts work and generates heat, the heat sent to be delivered on sheet metal 301 and sheet metal 301 to be heated heat up and distortion thus make sheet metal 301 keep distortion and off state, until trouble shooting and when being again energized PTC device 302 quit work, make sheet metal 301 Temperature fall and resile and be energized with contact thus make toroidal transformer 100 continue normal work.PTC device 302 can effectively prevent sheet metal 301 from repeatedly working when short circuit.
The utility model toroidal transformer 100 simple and reasonable; input lead-in wire 101 is connected into making toroidal transformer 100 open circuit when being short-circuited thus the short-circuit protector played a protective role, and short-circuit protector comprises when being heated intensification and the self-heating that are electrically connected on input lead-in wire 101 by contact are heated up and can deform and be separated from contact thus have the high value sheet metal 301 of the switching function of short-circuit protection.When being short-circuited, excessive electric current makes device heating heat up, especially the sheet metal 301 of high value, excessive electric current makes the metal of high value self heating up rapidly and distortion thus be separated from contact and input gone between 101 open circuits and then make toroidal transformer 100 rapid translating be off state occur, simultaneously, the heat of other devices also can be delivered on sheet metal 301, sheet metal 301 is heated intensification, contribute to temperature increase speed and the deformation velocity of accelerating sheet metal 301, like this simple and reasonable, this short-circuit protector just can carry out short-circuit protection timely and effectively to the load of toroidal transformer 100 and output.Visible; the resistance of sheet metal 301 is high; when short circuit; can be heated up by the mode of external heat transfer or be heated up by self-heating; quickly, after being namely short-circuited, sheet metal 301 can promptly elevated temperature deformation thus be separated from contact in time for programming rate; get final product open circuit in the very first time, protect the load of toroidal transformer 100 and output lead-in wire 102 to the full extent.In addition, sheet metal 301 pairs of electric currents of high value are very responsive, and electric current is once excessive, and the induction of sheet metal 301 is very rapid, and heating also can be out of shape in time thus be separated from contact and make circuit breaker rapidly, and short-circuit protection is rapid in time.In addition, sheet metal 301 two ends be parallel with start work when sheet metal 301 open circuit and when sheet metal 301 is energized during out-of-work work heatable thus effectively make sheet metal 301 in short circuit time not resilience and the PTC device 302 that is in off state and then avoids sheet metal repeatedly to work.During open circuit, PTC device 302 starts work and generates heat, and the heat sent to be delivered on sheet metal 301 and sheet metal 301 to be heated heat up and distortion thus make sheet metal 301 keep distortion and off state.Until trouble shooting and when being again energized PTC device 302 quit work, make sheet metal 301 Temperature fall and resile and be energized with contact thus make toroidal transformer 100 continue normal work.PTC device 302 can effectively prevent sheet metal 301 from repeatedly working when short circuit.The utility model achieves one and has short-circuit protection function, and short-circuit protection is rapid in time, simple and reasonable power transformer.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure transformation utilizing the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (3)
1. one kind has the power transformer of short-circuit protection function, it is characterized in that, comprise housing, be located at described enclosure interior and the toroidal transformer gone between with output with input lead-in wire, with described input go between be electrically connected plug, be embedded on described housing and go between the socket be electrically connected, the control switch be located on described housing with described output;
Described toroidal transformer is fixed in described housing by fixed structure peace, described fixed structure comprise be fixedly arranged on described housing inner bottom part and pad be located at described toroidal transformer lower surface the lower rubber cushion with insulation and cushioning effect, be fixedly arranged on described toroidal transformer upper surface having insulation and the upper rubber cushion of cushioning effect, also comprise described upper rubber cushion, described toroidal transformer, described lower rubber cushion to be pressed solidly to lock and be fixed to described housing press solidly connector;
Described toroidal transformer comprises iron core, armature winding, secondary winding, described input lead-in wire, described output lead-in wire, also comprises and is series on described input lead-in wire and can makes described toroidal transformer open circuit when being short-circuited thus the short-circuit protector played a protective role;
Described short-circuit protector comprises when being heated intensification and the self-heating that are electrically connected on described input lead-in wire by contact are heated up and can deform and be separated from described contact thus have the high value sheet metal of the switching function of short-circuit protection, and electric current excessive when being short-circuited makes be heated intensification and self fast heating of the described sheet metal of high value heat up and distortion thus be separated from described contact and described input gone between open circuit occurs and then makes described toroidal transformer rapid translating be off state;
Described sheet metal two ends be parallel with start work when described sheet metal open circuit and when the energising of described sheet metal during out-of-work work heatable thus effectively make described sheet metal in short circuit time not resilience and the PTC device that is in off state and then avoids described sheet metal repeatedly to work, described PTC device startup work during open circuit is also generated heat, the heat sent to be delivered on described sheet metal and described sheet metal to be heated heat up and distortion thus make described sheet metal keep distortion and off state, until trouble shooting and when being again energized described PTC device quit work, make described sheet metal Temperature fall and resile and be energized with described contact thus make described toroidal transformer continue normally to work.
2. a kind of power transformer with short-circuit protection function according to claim 1, it is characterized in that, described short-circuit protector is fixed on the lateral surface of described toroidal transformer.
3. a kind of power transformer with short-circuit protection function according to claim 1 and 2, is characterized in that, described housing by can mutually split and be connected by screw fixing upper casing, lower casing forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520926971.9U CN205230786U (en) | 2015-11-19 | 2015-11-19 | Power transformer with short-circuit protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520926971.9U CN205230786U (en) | 2015-11-19 | 2015-11-19 | Power transformer with short-circuit protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205230786U true CN205230786U (en) | 2016-05-11 |
Family
ID=55905833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520926971.9U Active CN205230786U (en) | 2015-11-19 | 2015-11-19 | Power transformer with short-circuit protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205230786U (en) |
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2015
- 2015-11-19 CN CN201520926971.9U patent/CN205230786U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |