CN109817455A - A kind of Support Capacitor and the temperature-reduction protective for Support Capacitor - Google Patents
A kind of Support Capacitor and the temperature-reduction protective for Support Capacitor Download PDFInfo
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- CN109817455A CN109817455A CN201711175708.0A CN201711175708A CN109817455A CN 109817455 A CN109817455 A CN 109817455A CN 201711175708 A CN201711175708 A CN 201711175708A CN 109817455 A CN109817455 A CN 109817455A
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- capacitor
- inner core
- capacitance
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- busbar
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Abstract
The invention discloses a kind of Support Capacitor and for the temperature-reduction protective of Support Capacitor.The capacitor includes: capacitance inner core；External busbar is connected to the capacitance inner core, is configured to provide for the interface that external devices are connected to the capacitance inner core, wherein the external busbar is additionally configured to access the capacitance inner core again after multiple external interfaces converge on external busbar.The temperature rise of the capacitance inner core of Support Capacitor can be effectively controlled according to the method for the present invention；Compared to the prior art, capacitance structure of the invention is simple, has better stability and safety.
Description
Technical field
The present invention relates to electronic technology fields, and in particular to a kind of Support Capacitor and the cooling protection for Support Capacitor
Method.
Background technique
Support Capacitor is a kind of common electric elements.In the prior art, Support Capacitor raw materials are polypropylene
Film, such polypropylene film capacity when temperature reaches 105 DEG C or more start to decay.And in many application scenarios, branch
Supportting capacitor can be under higher operating temperature.For example, Support Capacitor is due to operating condition inside electric vehicle motor controller
Complexity, ripple voltage is higher, therefore Support Capacitor temperature rise is higher.Therefore, it in order to maintain the Support Capacitor service life, needs to support electricity
Appearance cools down.
In the prior art, the mode of improvement working environment is generallyd use to avoid Support Capacitor temperature rise excessively high.For example, changing
Become set structure, improves ventilation and heat efficiency；Increase water-cooling system/air cooling system etc..But aforesaid way not only will increase machine
The complexity of group structure promotes hardware cost and unit volume, and since cooling means specific aim is not strong, cooling effect is simultaneously
It is undesirable.
Summary of the invention
The present invention provides a kind of Support Capacitor, the capacitor includes:
Capacitance inner core；
External busbar is connected to the capacitance inner core, is configured to provide for external devices and is connected to the capacitance inner core
Interface, wherein the external busbar is additionally configured to access again in the capacitor after multiple external interfaces converge on external busbar
Core.
In one embodiment, the external busbar includes positive/negative busbar interface and positive/negative 3 interfaces.
In one embodiment, the external busbar is additionally configured to after the abundant change of current of electric current for enabling positive/negative 3 interfaces of access again
Access the capacitance inner core.
The invention also provides a kind of temperature-reduction protectives for Support Capacitor, which comprises
Increase external busbar, enables the electric current for being connected to the capacitor by entering back into the capacitor after the external busbar confluence
Inner core.
In one embodiment, the method also includes:
Enable the three-phase current for being connected to the capacitor by entering back into the interior of the capacitor after the external abundant change of current of busbar
Core.
In one embodiment, the method also includes:
It is emulated by thermal condition, determines the position radiated most useful for Support Capacitor.
In one embodiment, the method also includes:
The capacitor is placed in and is close to electric machine controller heat dissipation water inlet.
In one embodiment, the method also includes:
Temp probe is set inside the capacitor, monitors the capacitance temperature in real time；
System output power is reduced when the capacitance temperature is more than preset first temperature warning value；
It is reduced when the capacitance temperature is more than preset second temperature warning value and enables system-down.
In one embodiment, the method also includes:
Monitor the electric current of the capacitor；
Early warning is issued when the electric current is more than the first electric current warning value.
In one embodiment, the method also includes:
Fuse is set in the capacitor pin, the fuse is set as when the electric current of the capacitor being more than the second electric current
Circuit is actively cut off when warning value.
The temperature rise of the capacitance inner core of Support Capacitor can be effectively controlled according to the method for the present invention；Compared to the prior art,
Capacitance structure of the invention is simple, has better stability and safety.
Other feature or advantage of the invention will illustrate in the following description.Also, Partial Feature of the invention or
Advantage will be become apparent by specification, or be appreciated that by implementing the present invention.The purpose of the present invention and part
Advantage can be realized or be obtained by step specifically noted in the specification, claims and drawings.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example and is used together to explain the present invention, be not construed as limiting the invention.In the accompanying drawings:
The capacitance structure schematic diagram of Fig. 1 and Fig. 2 different embodiments according to the present invention.
Specific embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, implementation personnel of the invention whereby
Can fully understand that how the invention applies technical means to solve technical problems, and reach technical effect realization process and according to
The present invention is embodied according to above-mentioned realization process.As long as each embodiment it should be noted that do not constitute conflict, in the present invention
And each feature in each embodiment can be combined with each other, be formed by technical solution protection scope of the present invention it
It is interior.
Support Capacitor is a kind of common electric elements.In the prior art, Support Capacitor raw materials are polypropylene
Film, such polypropylene film capacity when temperature reaches 105 DEG C or more start to decay.And in many application scenarios, branch
Supportting capacitor can be under higher operating temperature.For example, Support Capacitor is due to operating condition inside electric vehicle motor controller
Complexity, ripple voltage is higher, therefore Support Capacitor temperature rise is higher.Therefore, it in order to maintain the Support Capacitor service life, needs to support electricity
Appearance cools down.
In the prior art, the mode of improvement working environment is generallyd use to avoid Support Capacitor temperature rise excessively high.For example, changing
Become set structure, improves ventilation and heat efficiency；Increase water-cooling system/air cooling system etc..But aforesaid way not only will increase machine
The complexity of group structure promotes hardware cost and unit volume, and since cooling means specific aim is not strong, cooling effect is simultaneously
It is undesirable.
In view of the above-mentioned problems, the invention proposes a kind of temperature-reduction protectives for Support Capacitor.In side of the invention
In method, from the structure of Support Capacitor itself, the calorific value of Support Capacitor itself is reduced first.
In circuit system, fever when electric current passes through route is an important heat source.Especially, in multichannel electric current
Rendezvous Point, calorific value can dramatically increase.Therefore, in one embodiment, it will move, enable outside the electric current Rendezvous Point inside Support Capacitor
The inner core (polypropylene film) of Support Capacitor is partially separated with electric current Rendezvous Point.The fever of electric current Rendezvous Point will not direct shadow in this way
Ring the inner core for arriving Support Capacitor.
Specifically, in one embodiment, removing built-in busbar, increase external busbar, enables the electric current for being connected to capacitor pass through outer
Capacitance inner core is entered back into after setting busbar confluence.Outside capacitance inner core, the fever of high current will be in capacitance inner core for confluence in this way
Outside avoids contact with fragile capacitance inner core.
Based on the above method, the invention also provides a kind of Support Capacitors.In one embodiment, capacitor includes:
Capacitance inner core；
External busbar, is connected to capacitance inner core, is configured to provide for the interface that external devices are connected to capacitance inner core,
In, external busbar is additionally configured to access capacitance inner core again after multiple external interfaces converge on external busbar.
Due to eliminating built-in DC master row, external busbar is added, the fever of busbar built in script has been transferred to outer
It sets on busbar, to effectively control the temperature rise of capacitance inner core.
The temperature rise of the capacitance inner core of Support Capacitor can be effectively controlled according to the method for the present invention；Compared to the prior art,
Capacitance structure of the invention is simple, has better stability and safety.
Specifically, as shown in Figure 1, in one embodiment, external busbar 120 has external interface 111~118.External
In busbar 120, the anode of capacitance inner core 110 is accessed after the electric current confluence of input 111,112,113 and 114 again, input 115,
116, the cathode of capacitance inner core 110 is accessed after 117 and 118 electric current confluence again.Input 111,112,113 and 114 in this way
Electric current converge and distributed heat and input 115,116,117 and 118 electric current the distributed heat that converges and just concentrate
On external busbar 120, rather than on capacitance inner core 110, to reduce the calorific value of capacitance inner core 110.
Further, in one embodiment, external busbar includes positive/negative busbar interface and positive/negative 3 interfaces.
Specifically, in one embodiment, as shown in Figure 1,111 and 115 are positive/negative busbar interface；112,113,114,
116,117 and 118 be positive/negative 3 interfaces.
Further, when route accesses alternating current, the lasting variation of electric current also results in calorific value rising.Therefore,
In one embodiment, enable the three-phase current for being connected to capacitor by entering back into capacitance inner core after the abundant change of current of external busbar.Sufficiently change
It not only will be greatly reduced curent change amplitude after stream but also the current effective value for eventually entering into capacitance inner core can be enabled to greatly reduce, from
And substantially reduce the temperature rise of capacitance inner core.
Based on the above method, the invention also provides a kind of corresponding Support Capacitor structures.Specifically, in an embodiment
In, capacitor includes capacitance inner core and external busbar.External busbar is connected to capacitance inner core, is configured to provide for external devices connection
To the interface of capacitance inner core, in which:
External busbar includes positive/negative busbar interface and positive/negative 3 interfaces；
External busbar is additionally configured to access capacitance inner core again after multiple external interfaces converge on external busbar；
External busbar is additionally configured to access capacitance inner core again after enabling the abundant change of current of electric current for accessing positive/negative 3 interfaces.
In an application scenarios, as shown in Fig. 2, C is capacitor, ab is the capacitance inner core of capacitor C.A, B be positive/negative busbar connects
Mouthful；1,3,5,2,4 and 6 be positive/negative 3 interfaces.
Outside capacitance inner core ab:
A, the positive a of capacitance inner core ab is accessed again after 1,3,5 confluences and 1,3, the 5 abundant changes of current；
B, the cathode b of capacitance inner core ab is accessed again after 2,3,4 confluences and 2,3, the 4 abundant changes of current.
Further, in one embodiment, the temperature rise of Support Capacitor is also controlled by the way of external environment auxiliary heat dissipation.
Specifically, in one embodiment, emulating by thermal condition, the position radiated most useful for Support Capacitor is determined.
Further, in one embodiment, capacitor is placed in and is close to electric machine controller heat dissipation water inlet, guaranteed to branch
The cooling water temperature for supportting capacitor heat dissipation is minimum.
Further, in one embodiment, the mode real-time control capacitor temperature rise of two sections of monitoring temperatures is additionally used.Specifically
, in one embodiment:
Temp probe is set inside capacitor, monitors capacitance temperature in real time；
System output power is reduced when capacitance temperature is more than preset first temperature warning value；
It is reduced when capacitance temperature is more than preset second temperature warning value and enables system-down.
Specifically, in an application scenarios, temp probe is set inside Support Capacitor, implement to Support Capacitor temperature into
Row monitoring.The temperature signal that monitoring is obtained is sent into circuit board, if temperature is more than the first early warning value (80 DEG C), temperature sensor will
Temperature signal informs that controller CPU, CPU issue limit function instruction, reduces system output power, extensive until temperature is lower than 80 DEG C
It is multiple normal.
Specifically, reducing power to 60%, i.e., by taking current power is 60KW as an example, it is reduced to 60KW × 60%=36KW.
Until
If temperature is more than 85 DEG C, CPU issues halt instruction.
Further, cause since the excessively high major part of temperature is that electric current is excessive, in one embodiment, using current monitoring
Mode real-time control capacitor temperature rise.Specifically, in one embodiment:
Monitor the electric current of capacitor；
Early warning is issued when electric current is more than the first electric current warning value.
Further, in one embodiment, fuse is set in capacitor pin, fuse is set as when the electric current of capacitor is super
Circuit is actively cut off when crossing the second electric current warning value.
Further, by real-time current monitoring in conjunction with fuse.It is alert less than the second electric current that first electric current warning value is set
Ring value.Early warning is issued when electric current is more than the first electric current warning value, if temperature continues to increase, until guarding against more than the second electric current
Value, fuse disconnecting circuit.
Specifically, fuse, current sensor is arranged in each pin output end of capacitor, works as electric current in an application scenarios
More than the first early warning value, current sensor will issue early warning；If being seriously more than current limit (more than the second early warning value), fuse
Main circuit will actively be cut off.
While it is disclosed that embodiment content as above but described only to facilitate understanding the present invention and adopting
Embodiment is not intended to limit the invention.Method of the present invention can also have other various embodiments.Without departing substantially from
In the case where essence of the present invention, those skilled in the art make various corresponding changes or change in accordance with the present invention
Shape, but these corresponding changes or deformation all should belong to scope of protection of the claims of the invention.
Claims (10)
1. a kind of Support Capacitor, which is characterized in that the capacitor includes:
Capacitance inner core；
External busbar is connected to the capacitance inner core, is configured to provide for the interface that external devices are connected to the capacitance inner core,
Wherein, the external busbar is additionally configured to access the capacitance inner core again after multiple external interfaces converge on external busbar.
2. capacitor according to claim 1, which is characterized in that the external busbar include positive/negative busbar interface and just/
Minus 3 interfaces.
3. capacitor according to claim 2, which is characterized in that the external busbar is additionally configured to that access positive/negative 3 is enabled to connect
The capacitance inner core is accessed again after the abundant change of current of electric current of mouth.
4. a kind of temperature-reduction protective for Support Capacitor, which is characterized in that the described method includes:
Increase external busbar, enables the electric current for being connected to the capacitor by entering back into the interior of the capacitor after the external busbar confluence
Core.
5. according to the method described in claim 4, it is characterized in that, the method also includes:
Enable the inner core for being connected to the three-phase current of the capacitor by entering back into the capacitor after the external abundant change of current of busbar.
6. method according to claim 4 or 5, which is characterized in that the method also includes:
It is emulated by thermal condition, determines the position radiated most useful for Support Capacitor.
7. the method according to any one of claim 4~6, which is characterized in that the method also includes:
The capacitor is placed in and is close to electric machine controller heat dissipation water inlet.
8. the method according to any one of claim 4~7, which is characterized in that the method also includes:
Temp probe is set inside the capacitor, monitors the capacitance temperature in real time；
System output power is reduced when the capacitance temperature is more than preset first temperature warning value；
It is reduced when the capacitance temperature is more than preset second temperature warning value and enables system-down.
9. the method according to any one of claim 4~8, which is characterized in that the method also includes:
Monitor the electric current of the capacitor；
Early warning is issued when the electric current is more than the first electric current warning value.
10. the method according to any one of claim 4~9, which is characterized in that the method also includes:
Fuse is set in the capacitor pin, the fuse is set as when the electric current of the capacitor being more than the warning of the second electric current
Circuit is actively cut off when value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711175708.0A CN109817455A (en) | 2017-11-22 | 2017-11-22 | A kind of Support Capacitor and the temperature-reduction protective for Support Capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711175708.0A CN109817455A (en) | 2017-11-22 | 2017-11-22 | A kind of Support Capacitor and the temperature-reduction protective for Support Capacitor |
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| Publication Number | Publication Date |
|---|---|
| CN109817455A true CN109817455A (en) | 2019-05-28 |
Family
ID=66601275
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711175708.0A Pending CN109817455A (en) | 2017-11-22 | 2017-11-22 | A kind of Support Capacitor and the temperature-reduction protective for Support Capacitor |
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Citations (6)
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|---|---|---|---|---|
| CN2788519Y (en) * | 2005-04-27 | 2006-06-14 | 谢步明 | Integral convertor power heat radiating module for electric vehicle |
| JP2007201117A (en) * | 2006-01-26 | 2007-08-09 | Matsushita Electric Ind Co Ltd | Case-molded capacitor |
| KR20090054738A (en) * | 2007-11-27 | 2009-06-01 | 현대자동차주식회사 | Inverter for automobile |
| CN103427669A (en) * | 2013-08-23 | 2013-12-04 | 青岛四方车辆研究所有限公司 | Vehicular converter power module |
| CN204390913U (en) * | 2015-01-27 | 2015-06-10 | 国家电网公司 | A kind of capacitor |
| CN106469611A (en) * | 2015-08-21 | 2017-03-01 | 赛米控电子股份有限公司 | There are the power electronics assemblies of capacitor device |
-
2017
- 2017-11-22 CN CN201711175708.0A patent/CN109817455A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2788519Y (en) * | 2005-04-27 | 2006-06-14 | 谢步明 | Integral convertor power heat radiating module for electric vehicle |
| JP2007201117A (en) * | 2006-01-26 | 2007-08-09 | Matsushita Electric Ind Co Ltd | Case-molded capacitor |
| KR20090054738A (en) * | 2007-11-27 | 2009-06-01 | 현대자동차주식회사 | Inverter for automobile |
| CN103427669A (en) * | 2013-08-23 | 2013-12-04 | 青岛四方车辆研究所有限公司 | Vehicular converter power module |
| CN204390913U (en) * | 2015-01-27 | 2015-06-10 | 国家电网公司 | A kind of capacitor |
| CN106469611A (en) * | 2015-08-21 | 2017-03-01 | 赛米控电子股份有限公司 | There are the power electronics assemblies of capacitor device |
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Application publication date: 20190528 |