CN204464260U - A kind of IGBT module built-in current sensing chip - Google Patents
A kind of IGBT module built-in current sensing chip Download PDFInfo
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- CN204464260U CN204464260U CN201520228192.1U CN201520228192U CN204464260U CN 204464260 U CN204464260 U CN 204464260U CN 201520228192 U CN201520228192 U CN 201520228192U CN 204464260 U CN204464260 U CN 204464260U
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Abstract
The utility model discloses a kind of IGBT module built-in current sensing chip, comprise a sensing unit, described sensing unit is connected with IGBT brachium pontis, also comprises the programmable-gain transducing signal that sensing unit obtains being carried out Gain tuning, the temperature compensation unit detecting sensing chip ambient temperature, the amending unit at zero point that sensing chip carried out to programming Control and communication supervisory controller unit and revise the output data of sensing unit; Described programmable-gain connects with described sensing unit; Described temperature compensation unit, controller unit and zero point amending unit connect with described programmable-gain.The utility model have employed a kind of sensor unit of anti-outfield interference, the problem of surrounding magnetic field interference and wire crosstalk can be solved well, and the utility model can be potted directly on the output brachium pontis of IGBT, its volume is little, there is very strong anti-interference, thus achieve a kind of simple jamproof current sense of high accuracy.
Description
Technical field
The utility model relates to a kind of chip, particularly relates to a kind of IGBT module built-in current sensing chip.
Background technology
Because IGBT is encapsulated in a narrow space, traditional current sensor module is difficult to be encapsulated in IGBT brachium pontis due to capacity issue.And use traditional current sense chip, although it is feasible to be encapsulated in the inside, because sensing chip does not possess the ability of anti-outfield interference, in IGBT packaging body, electric current disturbs each other mutually, causes current detecting to be forbidden, and clutter is very large.
Utility model content
The purpose of this utility model solves the problems of the prior art, provides a kind of and have that volume is little, the IGBT module built-in current sensing chip of strong interference immunity.
The technical solution of the utility model is: a kind of IGBT module built-in current sensing chip, and comprise a sensing unit, described sensing unit is connected with IGBT brachium pontis; Also comprise the programmable-gain transducing signal that sensing unit obtains being carried out Gain tuning, the temperature compensation unit detecting sensing chip ambient temperature, the amending unit at zero point that sensing chip carried out to programming Control and communication supervisory controller unit and the output data of sensing unit are revised; Described programmable-gain connects with described sensing unit; Described temperature compensation unit, controller unit and zero point amending unit connect with described programmable-gain.
Preferably, the described temperature compensation unit register that comprises temperature sensor, the analog to digital converter connected with described temperature sensor and connect with described analog to digital converter; Described register connects with described programmable-gain.
Preferably, described controller unit comprises communication interface, controller and programmable unit; Described communication interface connects described controller, and described controller connects described programmable unit; Described programmable unit respectively with programmable-gain, zero point amending unit connect.
Preferably, also comprise a benchmark able to programme, this benchmark able to programme connects with described programmable-gain; Described access externally fed in benchmark one end able to programme, one end ground connection.
Preferably, amending unit connected a high-accuracy voltage and exported described zero point, and this high-accuracy voltage is exported and connected by the processor of output with external treatment sensing data.
Preferably, described sensing unit comprises four magnetic sensing units and a detection wire; Described four magnetic sensing units are rectangle arrayed, described detection wire is parallel to described four magnetic sensing unit place planes, and described detection wire is equal apart from the distance of described each magnetic sensing unit, the output of described each magnetic sensing unit exports after differential amplification unit.
Preferably, described detection wire is in the plane at described four magnetic sensing unit places.
Preferably, described four magnetic sensing units are quadrate array arrangement.
Preferably, described magnetic sensing unit is hall sensor unit, giant magnetoresistance sensing unit or fluxgate sensing unit.
Preferably, described sensing chip is giant magnetoresistance induction chip, hall sensing chip or fluxgate sensing chip.
The utility model have employed a kind of sensor unit of anti-outfield interference, the problem of surrounding magnetic field interference and wire crosstalk can be solved well, and the utility model can be potted directly on the output brachium pontis of IGBT, its volume is little, there is very strong anti-interference, thus achieve a kind of simple jamproof current sense of high accuracy.
Accompanying drawing explanation
Fig. 1 is internal structure schematic diagram of the present utility model.
Embodiment
The technological means realized to make the utility model, technical characteristic, utility model object and technique effect are easy to understand, and below in conjunction with concrete diagram, set forth the utility model further.
Shown in figure 1, be a kind of IGBT module built-in current sensing chip 10 of the present utility model, the sensing chip 10 in the utility model can adopt giant magnetoresistance induction chip, hall sensing chip or fluxgate sensing chip equimagnetic sensing chip wherein any one.The utility model comprises sensing unit 1, and this sensing unit 1 is connected with IGBT brachium pontis 2.
Sensing unit 1 in the utility model comprises four magnetic sensing units 11 and a detection wire (not shown).Four magnetic sensing units 11 are the one of independent hall sensor unit, giant magnetoresistance sensing unit or fluxgate sensing unit, or are the mutual combination of this several sensing unit, can be configured as differential state or integrating state.
Above-mentioned four magnetic sensing units 11 are rectangle or quadrate array arrangement, described detection wire is parallel to described four magnetic sensing unit 11 place planes, and described detection wire is equal apart from the distance of described each magnetic sensing unit 11, and detect wire in the plane at described four magnetic sensing unit 11 places, the output of described each magnetic sensing unit 11 exports after differential amplification unit.
The utility model also comprises the transducing signal obtained by sensing unit 1 and carries out the programmable-gain 3 of Gain tuning, the temperature compensation unit 4 detecting sensing chip 10 ambient temperature, the amending unit 6 at zero point that sensing chip 10 carried out to programming Control and communication supervisory controller unit 5 and revise the output data of sensing unit 1.
Programmable-gain 3 in the utility model connects with described sensing unit 1, carries out bidirectional transfer of information, and the transducing signal that sensing unit 1 obtains by programmable-gain 3 carries out Gain tuning, according to temperature regulation voltage; Described temperature compensation unit 4, controller unit 5 and zero point amending unit 6 to connect with described programmable-gain 3, carry out information transmission.
The register 43 that temperature compensation unit 4 in the utility model comprises temperature sensor 41, the analog to digital converter 42 connected with described temperature sensor 41 and connects with described analog to digital converter 42; Register 43 connects with described programmable-gain 3, carries out information transmission.
Wherein temperature sensor 41 is for detecting the ambient temperature around sensing chip 10, the temperature information that temperature sensor 41 obtains is converted into digital quantity by analog to digital converter 42,43, register is stored the temperature characteristic data information of temperature sensor 41, the multiple temperature spot characteristic of the storage inside of register 43, by temperature sensor 41, obtain temperature parameter, then this temperature characteristic data of retaking of a year or grade, be added to programmable-gain 3, thus the error effect that elimination variations in temperature is brought to temperature sensor 41.
Controller unit 5 in the utility model comprises communication interface 51, controller 52 and programmable unit 53; Communication interface 51 connects described controller 52, and described controller 52 connects described programmable unit 53; Described programmable unit 53 respectively with programmable-gain 3, zero point amending unit 6 to connect, carry out information transmission.
Described zero point, amending unit 6 carried out adjustment voltage fluctuation, and arranged null offset, and it connects a high-accuracy voltage and exports 61, and this high-accuracy voltage is exported 61 and connected by the processor of output 62 with external treatment sensing data, carries out information transmission; Wherein high-accuracy voltage exports 61 and the signal of transducer is adjusted to voltage output, also can be adjusted to digital signal and export.
The utility model also comprises a benchmark 7 able to programme, and this benchmark 7 able to programme connects with described programmable-gain 3; Described benchmark able to programme 3 one end access externally fed 31, one end ground connection 32.
Sensing chip in the utility model flows through the magnetic field of chip current generation by magneto-electric coupled original detection, and this magnetic field becomes some linear with primary current, sensing chip carries out gain modifications through programmable-gain after obtaining this current signal, temperature correction is carried out by temperature drift correcting unit, carry out adjustment at zero point by amending unit at zero point, and these parameter adjustments have been come by built-in numerical value processing controller.By high-precision analog output module, signal is exported after completing all signal transacting again.
The utility model have employed a kind of sensor unit of anti-outfield interference, the problem of surrounding magnetic field interference and wire crosstalk can be solved well, and the utility model can be potted directly on the output brachium pontis of IGBT, its volume is little, there is very strong anti-interference, thus achieve a kind of simple jamproof current sense of high accuracy.
Be only the utility model preferred embodiment in sum, be not used for limiting practical range of the present utility model.Namely all equivalences done according to the content of the utility model claim change and modify, and all should belong to technology category of the present utility model.
Claims (10)
1. an IGBT module built-in current sensing chip, comprise a sensing unit, described sensing unit is connected with IGBT brachium pontis, it is characterized in that: also comprise the programmable-gain transducing signal that sensing unit obtains being carried out Gain tuning, the temperature compensation unit detecting sensing chip ambient temperature, the amending unit at zero point that sensing chip carried out to programming Control and communication supervisory controller unit and revise the output data of sensing unit; Described programmable-gain connects with described sensing unit; Described temperature compensation unit, controller unit and zero point amending unit connect with described programmable-gain.
2. IGBT module built-in current sensing chip according to claim 1, is characterized in that: the register that described temperature compensation unit comprises temperature sensor, the analog to digital converter connected with described temperature sensor and connects with described analog to digital converter; Described register connects with described programmable-gain.
3. IGBT module built-in current sensing chip according to claim 1, is characterized in that: described controller unit comprises communication interface, controller and programmable unit; Described communication interface connects described controller, and described controller connects described programmable unit; Described programmable unit respectively with programmable-gain, zero point amending unit connect.
4. IGBT module built-in current sensing chip according to claim 1, it is characterized in that: also comprise a benchmark able to programme, this benchmark able to programme connects with described programmable-gain; Described access externally fed in benchmark one end able to programme, one end ground connection.
5. IGBT module built-in current sensing chip according to claim 1, is characterized in that: amending unit connected a high-accuracy voltage and exported described zero point, and this high-accuracy voltage is exported and connected by the processor of output with external treatment sensing data.
6. IGBT module built-in current sensing chip according to claim 1, is characterized in that: described sensing unit comprises four magnetic sensing units and a detection wire; Described four magnetic sensing units are rectangle arrayed, described detection wire is parallel to described four magnetic sensing unit place planes, and described detection wire is equal apart from the distance of described each magnetic sensing unit, the output of described each magnetic sensing unit exports after differential amplification unit.
7. IGBT module built-in current sensing chip according to claim 6, is characterized in that: described detection wire is in the plane at described four magnetic sensing unit places.
8. the IGBT module built-in current sensing chip according to claim 6 or 7, is characterized in that: described four magnetic sensing units are quadrate array arrangement.
9. the IGBT module built-in current sensing chip according to claim 6 or 7, is characterized in that: described magnetic sensing unit is hall sensor unit, giant magnetoresistance sensing unit or fluxgate sensing unit.
10. the IGBT module built-in current sensing chip according to any one of claim 1 to 6, is characterized in that: described sensing chip is giant magnetoresistance induction chip, hall sensing chip or fluxgate sensing chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520228192.1U CN204464260U (en) | 2015-04-15 | 2015-04-15 | A kind of IGBT module built-in current sensing chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520228192.1U CN204464260U (en) | 2015-04-15 | 2015-04-15 | A kind of IGBT module built-in current sensing chip |
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| Publication Number | Publication Date |
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| CN204464260U true CN204464260U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520228192.1U Withdrawn - After Issue CN204464260U (en) | 2015-04-15 | 2015-04-15 | A kind of IGBT module built-in current sensing chip |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716108A (en) * | 2015-04-15 | 2015-06-17 | 浙江巨磁智能技术有限公司 | IGBT module built-in current sensing chip |
| CN107356890A (en) * | 2017-06-19 | 2017-11-17 | 宁波中车时代传感技术有限公司 | The adjustable proframmable linear Hall sensor chip of benchmark |
-
2015
- 2015-04-15 CN CN201520228192.1U patent/CN204464260U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716108A (en) * | 2015-04-15 | 2015-06-17 | 浙江巨磁智能技术有限公司 | IGBT module built-in current sensing chip |
| CN104716108B (en) * | 2015-04-15 | 2017-05-03 | 浙江巨磁智能技术有限公司 | IGBT module built-in current sensing chip |
| CN107356890A (en) * | 2017-06-19 | 2017-11-17 | 宁波中车时代传感技术有限公司 | The adjustable proframmable linear Hall sensor chip of benchmark |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: IGBT module built-in current sensing chip Effective date of registration: 20161207 Granted publication date: 20150708 Pledgee: Agricultural Bank of China Limited by Share Ltd Jiaxing science and Technology Branch Pledgor: ZHEJIANG JUCI INTELLIGENT TECHNOLOGY CO., LTD. Registration number: 2016330000096 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150708 Effective date of abandoning: 20170503 |
|
| AV01 | Patent right actively abandoned |