CN212435346U - Generator with overcurrent and overheat protection - Google Patents
Generator with overcurrent and overheat protection Download PDFInfo
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- CN212435346U CN212435346U CN202021226935.9U CN202021226935U CN212435346U CN 212435346 U CN212435346 U CN 212435346U CN 202021226935 U CN202021226935 U CN 202021226935U CN 212435346 U CN212435346 U CN 212435346U
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- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 230000005284 excitation Effects 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 238000005070 sampling Methods 0.000 claims description 9
- 238000013021 overheating Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model relates to a generator, concretely relates to generator with overcurrent and overheat protection, including a generator, and a base arranged on the generator, an overheat protection mechanism is connected on a power supply lead of the generator, an overcurrent protection mechanism is connected on an excitation coil of the generator, the overheat protection mechanism comprises a first current conducting plate and a second current conducting plate which are relatively fixed inside the base, a mounting seat is fixed on the base, a third current conducting plate is hinged on the mounting seat, a conducting post matched with the first current conducting plate and the second current conducting plate is fixed on the third current conducting plate, a groove is arranged on the base, and a first bimetallic strip for pushing the third current conducting plate to rotate is fixed on the inner wall of the groove; the utility model provides a technical scheme can effectively overcome the lack that prior art exists and overflow overheat protection's defect to the generator.
Description
Technical Field
The utility model relates to a generator, concretely relates to take overcurrent overheat protection's generator.
Background
The overload protection of the existing generator mostly adopts PTC or PT100 to monitor the temperature of a stator winding of the generator, and is matched with some peripheral devices to realize the shutdown protection of the overload operation of the generator, so that the overload protection has the defect of high cost, and if the generator operates according to the rated power under the condition of being lower than the rated power, the current-carrying capacity of a stator winding coil is a rated value, but actually, the generator is in an overload operation state, the temperature rise of a rotor winding and the temperature rise of a stator and rotor iron cores of the generator are greatly improved, and the generator is easy to burn down when operating in the state. In addition, the overheat protection mechanism of the existing generator is also complex and cannot play a good role in overheat protection.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
To the above-mentioned shortcoming that prior art exists, the utility model provides a take overcurrent overheat protection's generator can effectively overcome the lack that prior art exists and overflow overheat protection's defect to the generator.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
a generator with overcurrent and overheat protection comprises a generator and a base arranged on the generator, wherein a power supply lead of the generator is connected with an overheat protection mechanism, and an excitation coil of the generator is connected with an overcurrent protection mechanism;
the overheating protection mechanism comprises a first current-conducting plate and a second current-conducting plate which are relatively fixed in a base, a first mounting seat is fixed on the base, a third current-conducting plate is hinged to the first mounting seat, a conducting post matched with the first current-conducting plate and the second current-conducting plate is fixed on the third current-conducting plate, a groove is formed in the base, and a first bimetallic strip used for pushing the third current-conducting plate to rotate is fixed on the inner wall of the groove;
the overheating protection mechanism further comprises a fourth conducting plate hinged to the side wall of the base and a second mounting seat fixed to the side wall of the base, the fourth conducting plate is in contact with the first conducting plate, and a second bimetallic strip for pushing the fourth conducting plate to rotate is fixed on the second mounting seat;
the overcurrent protection mechanism comprises a switch protection tube V1 connected to the excitation coil, a positive feedback circuit connected with the switch protection tube V1, and a sampling circuit connected with the positive feedback circuit.
Preferably, the first conductive plate is fixed with a first conductive contact and a third conductive contact which are matched with the conductive column and the fourth conductive plate, and the second conductive plate is fixed with a second conductive contact which is matched with the conductive column.
Preferably, the thermal expansion coefficient of the metal sheet on one side of the first bimetal sheet close to the groove is larger than that of the metal sheet on the other side;
the thermal expansion coefficient of the metal sheet on one side of the second bimetallic strip, which is far away from the first conductive plate, is larger than that of the metal sheet on the other side.
Preferably, the metal sheet with a large thermal expansion coefficient is made of aluminum, and the metal sheet with a small thermal expansion coefficient is made of copper.
Preferably, the third conductive plate is fixed with a mounting block matched with the first bimetallic strip.
Preferably, a terminal is fixed on each of the second conductive plate and the fourth conductive plate.
Preferably, the base and the second mounting seat are both made of heat-conducting and insulating materials.
Preferably, the switch protection tube V1 is an N-channel mos tube, the drain and the source of the switch protection tube V1 are connected to the excitation coil of the generator, the positive feedback circuit includes a comparator a1, the output end of the comparator a1 is connected to the gate of a switch protection tube V1, the drain of the switch protection tube V1 is connected to the inverting input end of the comparator a1 through a clamping diode D1, and the non-inverting input end of the comparator a1 is connected to a reference voltage Vref.
Preferably, the inverting input terminal of the comparator a1 is connected to a sampling circuit composed of a resistor R7 and a resistor R8.
Preferably, the comparator a1 and the sampling circuit are both connected to the generator output voltage B +.
(III) advantageous effects
Compared with the prior art, the utility model provides a take overcurrent protection's generator adopts overcurrent protection mechanism cooperation dual overheat protection mechanism, can overflow the when overheated cutting off circuit at the generator, prevents that the generator from burning out, effectively prolongs the life of generator.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic view of an overheat protection mechanism according to the present invention;
fig. 2 is a schematic diagram of the overcurrent protection mechanism of the present invention;
fig. 3 is a schematic diagram of the overheat protection mechanism of fig. 1 according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
A generator with overcurrent and overheat protection comprises a generator and a base 1 arranged on the generator, as shown in figures 1 and 3, an overheat protection mechanism is connected to a power supply lead of the generator.
The overheating protection mechanism comprises a first current-conducting plate 2 and a second current-conducting plate 3 which are relatively fixed inside a base 1, a first mounting seat 6 is fixed on the base 1, a third current-conducting plate 7 is hinged on the first mounting seat 6, a conductive post 8 matched with the first current-conducting plate 2 and the second current-conducting plate 3 is fixed on the third current-conducting plate 7, a groove 14 is formed in the base 1, and a first bimetallic strip 15 used for pushing the third current-conducting plate 7 to rotate is fixed on the inner wall of the groove 14;
the overheating protection mechanism further comprises a fourth conducting plate 9 hinged to the side wall of the base 1 and a second mounting seat 12 fixed to the side wall of the base 1, the fourth conducting plate 9 is in contact with the first conducting plate 2, and a second bimetallic strip 13 used for pushing the fourth conducting plate 9 to rotate is fixed on the second mounting seat 12.
The first conductive plate 2 is fixed with a first conductive contact 4 and a third conductive contact 10 which are matched with the conductive column 8 and the fourth conductive plate 9, and the second conductive plate 3 is fixed with a second conductive contact 5 which is matched with the conductive column 8. The arrangement of each electric contact, the cooperation leads electrical pillar 8, can guarantee that fourth current conducting plate 9-first current conducting plate 2-third current conducting plate 7-second current conducting plate 3 form the route when not receiving external force.
The thermal expansion coefficient of the metal sheet on one side of the first bimetallic strip 15 close to the groove 14 is larger than that of the metal sheet on the other side;
the coefficient of thermal expansion of the second bimetallic strip 13 is greater on the side of the strip remote from the first conductive plate 2 than on the other side.
The metal sheet with large thermal expansion coefficient is made of aluminum, and the metal sheet with small thermal expansion coefficient is made of copper.
When the generator is overheated, heat is transferred to the base 1 through the shell of the generator, the first bimetallic strip 15 and the second bimetallic strip 13 continuously receive the heat transferred from the base 1, and the aluminum metal strip with a large thermal expansion coefficient extends along the length direction by a larger amount than the copper metal strip with a small thermal expansion coefficient.
Therefore, the first bimetallic strip 15 extends and deflects upwards to push the third conductive plate 7 to rotate upwards, so that the conductive column 8 leaves the first conductive contact 4 and the second conductive contact 5, and the generator is powered off and stops working; the second bimetallic strip 13 extends and deflects to the right, and pushes the fourth conductive plate 9 to rotate upwards, so that the fourth conductive plate 9 is separated from the third conductive contact 10, and the generator is powered off and stops working.
In the above process, the separating action of the conductive column 8 from the first conductive contact 4 and the second conductive contact 5 is not required to be ensured, the separating action of the fourth conductive plate 9 from the third conductive contact 10 is synchronous, and the separating action can also be asynchronous when the conductive column is contacted with the third conductive contact, so that a 'double' overheating protection mechanism can be formed.
The third conductive plate 7 is fixed with a mounting block 16 which is matched with the first bimetallic strip 15, so that the first bimetallic strip 15 can extend upwards and deflect to push the mounting block 16.
The base 1 and the second mounting seat 12 are both made of heat-conducting insulating materials, so that the use safety is ensured.
It should be noted that, in the technical solution of the present application, the base 1 may be fixed to the generator by welding, and the first bimetal 15 and the groove 14, and the second bimetal 13 and the second mounting seat 12 may be fixed by welding.
As shown in fig. 2, an overcurrent protection mechanism is connected to the field coil of the generator, and the overcurrent protection mechanism includes a switch protection tube V1 connected to the field coil, a positive feedback circuit connected to the switch protection tube V1, and a sampling circuit connected to the positive feedback circuit.
The switch protection tube V1 is an N-channel mos tube, the drain electrode and the source electrode of the switch protection tube V1 are connected with an excitation coil of the generator, the positive feedback circuit comprises a comparator A1, the output end of the comparator A1 is connected with the grid electrode of the switch protection tube V1, the drain electrode of the switch protection tube V1 is connected with the reverse-phase input end of the comparator A1 through a clamping diode D1, and the non-phase input end of the comparator A1 is connected with reference voltage Vref.
The inverting input end of the comparator A1 is connected to a sampling circuit consisting of a resistor R7 and a resistor R8.
When the current of the exciting coil is normal, the clamping diode D1 pulls down the potential of the inverting input end of the comparator A1, so that the potential of the inverting input end of the comparator A1 is lower than the reference voltage Vref, the comparator A1 outputs high potential, the drain electrode and the source electrode of the switch protection tube V1 are conducted, and the exciting coil works normally.
When the magnet exciting coil is in overcurrent, the voltage between the drain and the source of the switch protection tube V1 and the voltage of the clamping diode D1 are larger than the reference voltage Vref, the comparator A1 outputs low potential, the switch protection tube V1 is cut off, the magnet exciting coil stops working, and accordingly overcurrent protection of the generator is achieved.
The comparator A1 and the sampling circuit are both connected to the output voltage B + of the generator. The arrangement makes the inverting input end potential of the comparator A1 and the working voltage of the comparator A1 synchronously controlled by the output voltage B + of the generator, so that the overcurrent protection mechanism is safer and more perfect.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a take overcurrent and overheat protection's generator, includes the generator to and install base (1) on the generator, its characterized in that: the power supply lead of the generator is connected with an overheating protection mechanism, and an excitation coil of the generator is connected with an overcurrent protection mechanism;
the overheating protection mechanism comprises a first conductive plate (2) and a second conductive plate (3) which are relatively fixed inside a base (1), a first mounting seat (6) is fixed on the base (1), a third conductive plate (7) is hinged on the first mounting seat (6), a conductive post (8) matched with the first conductive plate (2) and the second conductive plate (3) is fixed on the third conductive plate (7), a groove (14) is formed in the base (1), and a first double metal sheet (15) for pushing the third conductive plate (7) to rotate is fixed on the inner wall of the groove (14);
the overheating protection mechanism further comprises a fourth conductive plate (9) hinged to the side wall of the base (1) and a second mounting seat (12) fixed to the side wall of the base (1), the fourth conductive plate (9) is in contact with the first conductive plate (2), and a second bimetallic strip (13) used for pushing the fourth conductive plate (9) to rotate is fixed on the second mounting seat (12);
the overcurrent protection mechanism comprises a switch protection tube V1 connected to the excitation coil, a positive feedback circuit connected with the switch protection tube V1, and a sampling circuit connected with the positive feedback circuit.
2. The generator with overcurrent and overheat protection according to claim 1, wherein: first conductive contact (4) and third conductive contact (10) that are fixed with respectively on first conductive plate (2) and lead electrical pillar (8), fourth conductive plate (9) complex, be fixed with on second conductive plate (3) with lead electrical pillar (8) complex second conductive contact (5).
3. The generator with overcurrent and overheat protection according to claim 1, wherein: the thermal expansion coefficient of the metal sheet on one side, close to the groove (14), of the first bimetal sheet (15) is larger than that of the metal sheet on the other side;
the thermal expansion coefficient of the metal sheet on one side, away from the first conductive plate (2), of the second bimetallic strip (13) is larger than that of the metal sheet on the other side.
4. The generator with over-current and over-temperature protection as claimed in claim 3, wherein: the metal sheet with the large thermal expansion coefficient is made of aluminum, and the metal sheet with the small thermal expansion coefficient is made of copper.
5. The generator with overcurrent and overheat protection according to claim 1, wherein: and a mounting block (16) matched with the first bimetallic strip (15) is fixed on the third conductive plate (7).
6. The generator with overcurrent and overheat protection according to claim 1, wherein: and binding posts (11) are fixed on the second conductive plate (3) and the fourth conductive plate (9).
7. The generator with overcurrent and overheat protection according to claim 1, wherein: the base (1) and the second mounting seat (12) are both made of heat-conducting and insulating materials.
8. The generator with overcurrent and overheat protection according to claim 1, wherein: the switch protection tube V1 is an N-channel mos tube, the drain and the source of the switch protection tube V1 are connected with the excitation coil of the generator, the positive feedback circuit comprises a comparator A1, the output end of the comparator A1 is connected with the grid of the switch protection tube V1, the drain of the switch protection tube V1 is connected with the reverse phase input end of the comparator A1 through a clamping diode D1, and the non-phase input end of the comparator A1 is connected with a reference voltage Vref.
9. The generator with over-current and over-temperature protection as claimed in claim 8, wherein: the inverting input end of the comparator A1 is connected with a sampling circuit consisting of a resistor R7 and a resistor R8.
10. The generator with over-current and over-temperature protection as claimed in claim 9, wherein: the comparator A1 and the sampling circuit are both connected to the output voltage B + of the generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021226935.9U CN212435346U (en) | 2020-06-29 | 2020-06-29 | Generator with overcurrent and overheat protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021226935.9U CN212435346U (en) | 2020-06-29 | 2020-06-29 | Generator with overcurrent and overheat protection |
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| Publication Number | Publication Date |
|---|---|
| CN212435346U true CN212435346U (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021226935.9U Active CN212435346U (en) | 2020-06-29 | 2020-06-29 | Generator with overcurrent and overheat protection |
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| Country | Link |
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| CN (1) | CN212435346U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113163695A (en) * | 2021-05-08 | 2021-07-23 | 深圳陆巡科技有限公司 | Heat dissipation structure and method of high-power supply |
| WO2022236262A1 (en) * | 2021-05-04 | 2022-11-10 | Atieva, Inc. | Multi-layered ribbon bond wire |
-
2020
- 2020-06-29 CN CN202021226935.9U patent/CN212435346U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022236262A1 (en) * | 2021-05-04 | 2022-11-10 | Atieva, Inc. | Multi-layered ribbon bond wire |
| CN113163695A (en) * | 2021-05-08 | 2021-07-23 | 深圳陆巡科技有限公司 | Heat dissipation structure and method of high-power supply |
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