CN201355596Y - Energy-saving high-current low power consumption negative temperature coefficient component - Google Patents
Energy-saving high-current low power consumption negative temperature coefficient component Download PDFInfo
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- CN201355596Y CN201355596Y CNU2009200317694U CN200920031769U CN201355596Y CN 201355596 Y CN201355596 Y CN 201355596Y CN U2009200317694 U CNU2009200317694 U CN U2009200317694U CN 200920031769 U CN200920031769 U CN 200920031769U CN 201355596 Y CN201355596 Y CN 201355596Y
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Abstract
The utility model relates to an energy-saving high-current low power consumption negative temperature coefficient component which comprises a negative temperature coefficient thermistor chip, a fixed electrode sheet, a moving electrode sheet and an insulating shell, wherein a bimetallic thermal self-protection switch arranged between the fixed and moving electrode sheets is connected with the negative temperature coefficient thermistor chip in parallel. The energy-saving high-current low power consumption negative temperature coefficient component has the advantages that the negative temperature coefficient ceramic chip plays a role in restricting surge and gives out heat, the heat is transmitted to a bimetallic sheet and causes the bimetallic sheet to be deformed and curved so that the thermal self-protection switch is turned on. The bimetallic sheet has much smaller resistance value so as to conduct a larger current as well as retain smaller power consumption, therefore, the energy-saving high-current low power consumption negative temperature coefficient component can not only play the role of surge current suppression, but also has larger work current and small power consumption and low surface temperature under the working state, thereby being an energy-saving high-current low power consumption component. The energy-saving high-current low power consumption negative temperature coefficient component combines the unique functions of the negative temperature coefficient thermistor chip and the bimetallic sheet and has simple structure, high reliability and much wider use range.
Description
Technical field
The utility model relates to a kind of energy-saving high-current low-power consumption NTC device, is widely used in fields such as powerful conversion electric power, Switching Power Supply, ups power, all kinds of high-power illumination light fixture, motor soft start.
Background technology
At present, the disc element of the discrete installation that high-power type NTC themistor is made up of contact conductor, NTC chip, encapsulating material etc. is applied to rise in the circuit surge electric current inhibitory action.Because its normal temperature resistance value is 0.5～50 Ω, the steady operation electric current is 6～60A, and element self-heating temperature rising resistance reduces when energising work, and resistance value is 30～300m Ω under the steady operation electric current, power consumption 10～20w, the component body surface temperature is up to more than 150 ℃.Therefore both be unfavorable for energy-conservationly, again other elements in the circuit produced harmful effects, be difficult to extensive use under the occasion in bigger electric current, less space.
The utility model content
The purpose of this utility model is the deficiency big at existing high-power type NTC themistor power consumption, that caloric value is big, temperature is high, the conducting current capacity is low, a kind of energy-saving high-current low-power consumption NTC device is provided, this device can not only play the effect that surge current suppresses, and operating current is big, consumed power is little, the operating state underlaying surface temperature is low, is the energy-saving high-current low energy-consumption electronic device.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of energy-saving high-current low-power consumption NTC device, comprise NTC thermistor chip (1), fixed electrode sheet (2), moving electrode sheet (3) and insulation crust (6), fixed electrode sheet (2) and moving electrode sheet (3) and NTC ceramic chip (1) many contact points of the large contact surface elastic pressure copper sheet by fixed electrode sheet (2) and moving electrode sheet (3) contacts to be realized being electrically connected, moving electrode sheet (3) one ends are provided with bimetal leaf (4), bimetal leaf (4) one ends are provided with moving electric contact contact (5A), fixed electrode sheet (2) one ends prolong to be provided with decides electric contact contact (5B), decide to be provided with contact gap (5C) between electric contact contact (5B) and the moving electric contact contact (5A), above-mentioned bimetal leaf (4), move electric contact contact (5A) and decide electric contact contact (5B) the formation hot self-holding switch of bimetallic (7), hot self-holding switch (7) is in parallel by fixed electrode sheet (2) and moving electrode sheet (3) with NTC chip (1).
Described NTC thermistor chip (1) by high-performance NTC thermistor ceramic substrate, burning infiltration in the conductive layer silver electrode of ceramic substrate and be coated on substrate and silver electrode on oxidation resistant coating form and do not have lead-in wire disk or square shape sheet structure, size is Φ 15～60mm * 3.0～15mm or 15～60mm * 15～60mm * 3.0～15mm, resistance value is 0.5～50 Ω, and the steady operation electric current is 6～60A.
Described bimetal leaf (4) is shaped as bar shaped, L shaped or U-shaped, bimetal leaf (4) effective dimensions is 10～60mm * 2.5～15mm * 0.3～5mm, and resistance value is 0.2～25m Ω, and resistivity is 3.0～162 μ Ω cm, operating current is 6～200A, and consumed power is 0.5～10w.
Described fixed electrode sheet (2) and moving electrode sheet (3) are by constituting with the zinc-plated lead-out wire terminal of copper of external circuit welding or with copper chromium plating lead-out wire terminal and many contact points of large contact surface elastic pressure sheet that the external circuit screw is fastenedly connected.
Described moving electric contact contact (5A) and the contact gap (5C) of deciding between the electric contact contact (5B) are 0.2～5mm.
Described insulation crust (6) is made up of with thermal capacitance chamber (6B), the outlet of lead-out wire terminal, cover plate and installing hole the lock chamber (6A) of relative isolation, be provided with NTC ceramic chip (1), fixed electrode sheet (2) and moving electrode sheet (3) in the lock chamber (6A), be provided with hot self-holding switch (7) in the thermal capacitance chamber (6B), thermal capacitance chamber (6B) be arranged on lock chamber (6A) the side, following or above.
The utility model is compared with existing high-power NTC themistor, and its advantage is:
NTC thermistor chip of the present utility model plays surge inhibitory action and heating when energising work, heat is transmitted to bimetal leaf and makes it bending hot self-holding switch is connected and with the short circuit of NTC ceramic chip, the NTC ceramic chip almost no longer includes electric current and flows through, and the electric current bimetal leaf of flowing through makes bimetal leaf heating keep the reliable contact of electric contact contact.The resistance value of bimetal leaf is more much smaller in the resistance value under the steady-state current than NTC ceramic chip, therefore both can the bigger electric current of conducting, also can keep less power consumption, the temperature of device itself has just reduced a lot, is the energy-saving NTC device of a kind of big electric current, low-power consumption.The utility model can not only play the effect that surge current suppresses, and operating current is big, consumed power is little, and the operating state underlaying surface temperature is low, is the energy-saving high-current low energy-consumption electronic device.The utility model utilizes NTC thermistor chip and bimetal leaf peculiar function separately to make up, and principle is clear and definite, simple in structure, reliability is high, and the scope of application is more wide.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is one of embodiment of the present utility model structural representation.
Fig. 3 is two structural representations of embodiment of the present utility model.
Fig. 4 is three structural representations of embodiment of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
A kind of energy-saving high-current low-power consumption NTC device, comprise NTC thermistor chip (1), fixed electrode sheet (2), moving electrode sheet (3) and insulation crust (6), fixed electrode sheet (2) contacts with the large contact surface many contact point elastic pressure copper sheet of NTC ceramic chip (1) by fixed electrode sheet (2) and moving electrode sheet (3) with moving electrode sheet (3), moving electrode sheet (3) one ends are provided with bimetal leaf (4), bimetal leaf (4) end is provided with moving electric contact contact (5A), fixed electrode sheet (2) one ends prolong to be provided with decides electric contact contact (5B), decide to be provided with contact gap (5C) between electric contact contact (5B) and the moving electric contact contact (5A), above-mentioned bimetal leaf (4), move electric contact contact (5A) and decide electric contact contact (5B) the formation hot self-holding switch of bimetallic (7), hot self-holding switch (7) forms the parallel circuits annexation with NTC thermistor chip (1) by fixed electrode sheet (2) and moving electrode sheet (3).As shown in Figure 1, R among the figure
tRepresent NTC thermistor chip (1), K
tRepresent the hot self-holding switch of bimetallic (7).High-power NTC thermistor ceramic chip (1), hot self-holding switch (7) are assembled in the insulation crust (6), when energized, electric current forms path by fixed electrode sheet (2), NTC chip (1), moving electrode sheet (3), surge current in the circuit is suppressed, NTC chip (1) heating temp raises, heat is transmitted on the bimetal leaf (4) simultaneously, bimetal leaf (4) bending is connected moving electric contact contact (5A) and is decided electric contact contact (5B), hot self-holding switch (7) closure is carried out short circuit to NTC chip (1).The electric current bimetal leaf (4) of flowing through makes bimetal leaf (4) heating keep reliable contact of deciding electric contact contact (5B) and moving electric contact contact (5A).
Geometry, size and the resistance value of bimetal leaf (4) design according to rated operational current, electric current in the circuit mainly forms path by the hot self-holding switch of bimetallic (7), this bimetal leaf (4) is consumed power heating bending under rated operational current, and maintaining heat self-holding switch (7) is reliable to be connected.Like this, bimetal leaf (4) only needs to consume very little power just can the bigger operating current of conducting, and NTC ceramic chip (1) consumed power no longer almost itself.Resistance value 0.2～25m Ω of bimetal leaf is more much smaller than the resistance value 30～300m Ω of NTC chip under steady-state current, therefore both can the bigger electric current of conducting, also can keep less dissipation power, the temperature of device itself is lower than 80 ℃, is a kind of device of energy-saving high-current low-power consumption.
Described high-power NTC thermistor chip (1) is made up of in the conductive layer silver electrode of ceramic substrate, the oxidation resistant coating that is coated on substrate and the electrode the high-power NTC thermistor of high-performance ceramic substrate, burning infiltration, for not having lead-in wire disk or square shape sheet structure, its steady operation electric current lower section power density is 0.8～4w/cm
2, material constant B value 2500～3500, the electricalresistivity is 60～1100 Ω mm.Burning infiltration is 60～80% of a chip area in the area of the conductive layer silver electrode of ceramic substrate, and conductive layer is necessary evenly, fine and close, adhesion-tight, the neat zero defect in edge, thickness 〉=12 μ m.Be coated on oxidation resistant coating compact and firm, Upon Flexible Adhesion on substrate and the electrode, thickness 3～6 μ m, the electric conductivity that coating must not hindrance electrode.Contact realization with moving electrode sheet (3) by pressure with fixed electrode sheet (2) and be electrically connected its resistance value scope 0.5～50 Ω, steady operation current range 6～60A, size range Φ 15～60mm * 3.0～15mm or 15～60mm * 15～60mm * 3.0～15mm.
NTC thermistor chip (1) is that the utility model can be realized the core parts that surge current suppresses, have the anti-surge current ability that several times even number decuple the steady operation electric current, effectively being used the bigger electric current of conducting to be one of key technology of the present utility model.With the disc is example: example (1) ceramic substrate size Φ 15～30mm * 3～8mm, resistance value 1.0～50 Ω, steady operation electric current 6～25A, anti-surge current 6～80A; Example (2) ceramic substrate size Φ 25～50mm * 6～12mm, resistance value 0.8～30 Ω, steady operation electric current 15～45A, anti-surge current 50～150A; Example (3) pottery sizes of substrate Φ 45～60mm * 10～15mm, resistance value 0.5～20 Ω, steady operation electric current 30～60A, anti-surge current 120～200A.
The hot self-holding switch of described bimetallic (7) is an another key technology of the present utility model, bimetal leaf (4) has being heated or its free end of bending that generates heat produces displacement, cools off the characteristic that original-shape is recovered in the back, has simultaneously the characteristic that resistivity is little, working temperature is high again, utilize these characteristics design to become hot self-holding switch (7), its by bimetal leaf (4), decide electric contact contact (5B), moving electric contact contact (5A) and contact gap (5C) forms.
Described fixed electrode sheet (2) and moving electrode sheet (3) are made of electrode outlet line terminal and many contact points of large contact surface elastic pressure sheet, and the design of fixed electrode sheet (2) electrode outlet line terminal must take into account installation reliability and conductive capability: its lead-out wire terminal can be designed to welded type or the screw fastening-type is connected; Be designed to the elastic pressure sheet form of large contact surface, many contact points with NTC ceramic chip (1) pressure contact position, deciding electric contact contact (5B) can rivet or be welded on fixed electrode sheet (2) the one ends prolongation terminal line, the design of moving electrode sheet (3) lead-out wire terminal must take into account installation reliability and conductive capability, and its lead-out wire terminal can be designed to welded type or the screw fastening-type connects; Be designed to the elastic pressure sheet form of large contact surface, many contact points with NTC ceramic chip (1) pressure contact position, also need consider the effective length of the stiff end of bimetal leaf (4) to moving electric contact contact, bimetal leaf (4) stiff end is welded on the elastic pressure sheet of moving electrode sheet (3) to guarantee the good conduction of heat, the moving electric contact contact (5A) of free end welding or riveted joint.Fixed electrode sheet (2) and moving electrode sheet (3) material are the zinc-plated or chromium plating of copper, decide electric contact contact (5B) and moving electric contact contact (5A) material is a yellow gold.
Bimetal leaf (4) be hot self-holding switch (7) core parts.Bimetal leaf (4) material is advisable with the resistor-type bimetallic, its electrical resistivity range is 3.0～162 μ Ω cm, can under the condition of geometry and size qualification, satisfy the needs that various resistance values are dissipation power, in order under lower temperature, to produce enough displacements, also need take into account selection bigger than crooked K value.The Standard resistance range of bimetal leaf (4) is 0.2～25m Ω; Operating current is 6～200A; Power consumption is 0.5～10w; Be shaped as bar shaped, L shaped or U-shaped, the effective dimensions of bimetal leaf is that length is that 10～60mm, width are that 2.5～15mm, thickness are 0.3～5.0mm.
Bimetal leaf (4) applicating example: example (1) effective dimensions is 10～25mm * 2.5～6mm * 0.3～3mm, and resistance value is 0.5～25m Ω, and operating current is 6～80A, and dissipation power is 0.5～5w; Example (2) effective dimensions is 20～40mm * 4～10mm * 1.0～4.0mm, and resistance value is 0.3～1m Ω, and operating current is 70～150A, and dissipation power is 4～8w; Example (3) effective dimensions is 35～60mm * 8～15mm * 2～5mm, and resistance value is 0.2～0.5m Ω, and operating current is 120～200A, and dissipation power is 6～10w.
Power consumption device surface temperature when the surge current that contact gap (5C) directly influences device suppresses effect and steady operation, its gap is 0.2～5mm.
Described insulation crust (6) is made up of with thermal capacitance chamber (6B), the outlet of lead-out wire terminal, cover plate and installing hole the lock chamber (6A) of relative isolation, be provided with NTC thermistor chip (1), fixed electrode sheet (2) and moving electrode sheet (3) in the lock chamber (6A), be provided with hot self-holding switch (7) in the thermal capacitance chamber (6B), thermal capacitance chamber (6B) be arranged on lock chamber (6A) the side, following or above.The size of lock chamber (6A) is determined in conjunction with the size of NTC ceramic chip (1) size and fixed electrode sheet (2) and moving electrode sheet (3), is guaranteed solid and reliable.Thermal capacitance chamber (6B) is the working space of hot self-holding switch (7), and its size and degree of heat radiation affect the consumed power of device.Insulation crust (6) material requirements maximum operating temperature is 200 ℃.
Shown in Fig. 2～4, during assembling, with fixed electrode sheet (2), the electrode outlet line terminal of moving electrode sheet (3) respectively from the insulation crust (6) separately outlet pass and adjust the mutual alignment, NTC ceramic chip (1) is inserted between the elastic pressuring plate of two electrodes, add conduction according to circumstances, thermal conductive adhesive or silicone grease, guarantee good electrical contact and heat conduction, adjust the contact gap (5C) of deciding between electric contact contact (5B) and the moving electric contact contact (5A), sticking with glue agent or screw is fixed on fixed electrode sheet (2) and moving electrode sheet (3) on the insulation crust (6), build cover plate and fixing then, assembling is promptly finished.
Claims (6)
1, a kind of energy-saving high-current low-power consumption NTC device, comprise NTC thermistor chip (1), fixed electrode sheet (2), moving electrode sheet (3) and insulation crust (6), it is characterized in that: fixed electrode sheet (2) and moving electrode sheet (3) and NTC chip (1) many contact points of the large contact surface elastic pressure copper sheet by fixed electrode sheet (2) and moving electrode sheet (3) contacts to be realized being electrically connected, moving electrode sheet (3) one ends are provided with bimetal leaf (4), bimetal leaf (4) one ends are provided with moving electric contact contact (5A), fixed electrode sheet (2) one ends prolong to be provided with decides electric contact contact (5B), decide to be provided with contact gap (5C) between electric contact contact (5B) and the moving electric contact contact (5A), above-mentioned bimetal leaf (4), move electric contact contact (5A) and decide electric contact contact (5B) the formation hot self-holding switch of bimetallic (7), hot self-holding switch (7) is in parallel by fixed electrode sheet (2) and moving electrode sheet (3) with NTC chip (1).
2, energy-saving high-current low-power consumption NTC device as claimed in claim 1, it is characterized in that: described NTC thermistor chip (1) by high-performance NTC thermistor ceramic substrate, burning infiltration in the conductive layer silver electrode of ceramic substrate and be coated on substrate and silver electrode on oxidation resistant coating form and do not have lead-in wire disk or square shape sheet structure, size is Ф 15～60mm * 3.0～15mm or 15～60mm * 15～60mm * 3.0～15mm, resistance value is 0.5～50 Ω, and the steady operation electric current is 6～60A.
3, energy-saving high-current low-power consumption NTC device as claimed in claim 1, it is characterized in that: described bimetal leaf (4) is shaped as bar shaped, L shaped or U-shaped, bimetal leaf (4) effective dimensions is 10～60mm * 2.5～15mm * 0.3～5mm, resistance value is 0.2～25m Ω, resistivity is 3.0～162 μ Ω cm, operating current is 6～200A, and consumed power is 0.5～10w.
4, energy-saving high-current low-power consumption NTC device as claimed in claim 1 is characterized in that: described fixed electrode sheet (2) and moving electrode sheet (3) are by constituting with the zinc-plated lead-out wire terminal of copper of external circuit welding or with copper chromium plating lead-out wire terminal and many contact points of large contact surface elastic pressure sheet that the external circuit screw is fastenedly connected.
5, energy-saving high-current low-power consumption NTC device as claimed in claim 1 is characterized in that: described moving electric contact contact (5A) and the contact gap (5C) of deciding between the electric contact contact (5B) are 0.2～5mm.
6, energy-saving high-current low-power consumption NTC device as claimed in claim 1, it is characterized in that: described insulation crust (6) is made up of with thermal capacitance chamber (6B), the outlet of lead-out wire terminal, cover plate and installing hole the lock chamber (6A) of relative isolation, be provided with NTC chip (1), fixed electrode sheet (2) and moving electrode sheet (3) in the lock chamber (6A), be provided with hot self-holding switch (7) in the thermal capacitance chamber (6B), thermal capacitance chamber (6B) be arranged on lock chamber (6A) the side, following or above.
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| CNU2009200317694U CN201355596Y (en) | 2009-01-20 | 2009-01-20 | Energy-saving high-current low power consumption negative temperature coefficient component |
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| CNU2009200317694U CN201355596Y (en) | 2009-01-20 | 2009-01-20 | Energy-saving high-current low power consumption negative temperature coefficient component |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107705942A (en) * | 2017-09-25 | 2018-02-16 | 江苏时瑞电子科技有限公司 | A kind of oxidation resistant ceramic thermal resistance copper electrode |
| CN107768053A (en) * | 2017-09-25 | 2018-03-06 | 江苏时瑞电子科技有限公司 | A kind of ceramic thermistor electrode and preparation method thereof |
| CN109801811A (en) * | 2019-03-19 | 2019-05-24 | 广州安的电子技术有限公司 | Temperature switch |
| CN109980619A (en) * | 2019-03-15 | 2019-07-05 | 南京时恒电子科技有限公司 | A kind of surge current protection element for frequent starting device |
| CN110491725A (en) * | 2019-09-26 | 2019-11-22 | 佛山市通宝华龙控制器有限公司 | A kind of Kick type temperature controller of Anti-surging electric current |
| WO2023169621A3 (en) * | 2022-03-09 | 2023-11-02 | Schaeffler Technologies AG & Co. KG | Electrical connection assembly, and method for making electrical contact and for heating a bipolar plate of a fuel cell |
-
2009
- 2009-01-20 CN CNU2009200317694U patent/CN201355596Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107705942A (en) * | 2017-09-25 | 2018-02-16 | 江苏时瑞电子科技有限公司 | A kind of oxidation resistant ceramic thermal resistance copper electrode |
| CN107768053A (en) * | 2017-09-25 | 2018-03-06 | 江苏时瑞电子科技有限公司 | A kind of ceramic thermistor electrode and preparation method thereof |
| CN107768053B (en) * | 2017-09-25 | 2019-04-19 | 江苏时恒电子科技有限公司 | A kind of ceramic thermistor electrode and preparation method thereof |
| CN109980619A (en) * | 2019-03-15 | 2019-07-05 | 南京时恒电子科技有限公司 | A kind of surge current protection element for frequent starting device |
| CN109801811A (en) * | 2019-03-19 | 2019-05-24 | 广州安的电子技术有限公司 | Temperature switch |
| CN110491725A (en) * | 2019-09-26 | 2019-11-22 | 佛山市通宝华龙控制器有限公司 | A kind of Kick type temperature controller of Anti-surging electric current |
| WO2023169621A3 (en) * | 2022-03-09 | 2023-11-02 | Schaeffler Technologies AG & Co. KG | Electrical connection assembly, and method for making electrical contact and for heating a bipolar plate of a fuel cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20100220 |