CN106501594A - AC motor control current digital sensor - Google Patents
AC motor control current digital sensor Download PDFInfo
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- CN106501594A CN106501594A CN201611211850.1A CN201611211850A CN106501594A CN 106501594 A CN106501594 A CN 106501594A CN 201611211850 A CN201611211850 A CN 201611211850A CN 106501594 A CN106501594 A CN 106501594A
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- crystallite
- lower cover
- core body
- current
- motor control
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Ac Motors In General (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
A kind of AC motor control current digital sensor, is made up of upper lid, lower cover, crystallite annular core body, pcb board, single-chip microcomputer, Hall element, and which is characterized by：In the closing space of described upper lid and lower cover composition, crystallite annular core body, pcb board is encapsulated, described crystallite annular core body is the cylinder wound according to Archimedes spiral by crystallite strip, and rectangular slits are provided with cylinder；Single-chip microcomputer, Hall element is welded with described pcb board, Hall element is located at the rectangular slits middle position of crystallite annular core body, present invention employs the modular construction of the system integration, current detecting part and data processor are all concentrated in a housing, core devices are used as by single-chip microcomputer and implement Coordination Treatment, traditional current detecting is abandoned completely using sampling resistor and comparison circuit, has really realized that system is most saved and total optimization.
Description
Technical field
The present invention relates to a kind of current digital sensor, is mainly used in the three-phase of Electric Vehicle's Alternating motor drive controller
Current detecting is detected.
Background technology
Current detecting is one of most important detection technique of Electric Vehicle's Alternating electric machine controller, in alternating current generator stall or
There is the moment of surge current in person, VMOS pipes or IGBT module can bear the limit and have if can detect in the very first time
Evil dash current, the current channel of timely switch-off power device is that the effective protection for preventing motor power control module from burning is arranged
One of apply.
The three-phase current detection of driving motor for electric automobile controller, generally using with efficient constantan wire or constantan
Plate alloy directly as an element in electric machine controller three-phase current loop, then is aided with electric current and compares as sampling resistor
Window circuit is constituted.Wherein, current sample part is compared electric current with electric current and is fought separately, for different current parameters, certainly will
Increase multiple comparison window circuits.
Described constantan is the copper alloy containing 40% nickel and 1.5% manganese, as which has the temperature coefficient of low-resistivity,
Typically can use within the scope of the wider temperature, but due to the high resistivity of constantan, during current detecting, constantan wire or
Current sampling resistor of the constantan plate as three-phase loop, its heating are also extremely serious, and this disappears for the electricity of vehicle mounted dynamic battery
Consumption is totally unfavorable.
Content of the invention
Technical problem
How the defect of existing Electric Vehicle's Alternating electric machine controller current detecting, exactly the problem to be solved in the present invention are overcome.
At present, there is following two asking in the three-phase current detection of electric automobile the driving motor control device or total current detection
Topic：
1st, adopt direct measuring, constantan wire or constantan plate directly as sampling resistor, become electric machine controller three-phase current
A current measuring element in loop, due to the inborn high resistivity of constantan material, therefore during current detecting, constantan
The heating of silk or constantan plate itself is also extremely serious, on the one hand reduces the service efficiency of battery, on the other hand also increases friendship
The radiating cost of stream electric machine controller.
2nd, current sample part and current comparison circuit are fought separately, and, each electric current comparison window circuit can only
A current threshold parameter is set, for different current parameters, certainly will will be increased multiple comparison window circuits, will be greatly increased
The hardware detection expense of electric current.
Technical scheme
In order to overcome the defect of existing electric vehicle motor controller current detecting, the present invention to propose a kind of electric motor car of novelty
Electric machine controller current digital sensor plan, is in place of its novelty：
1st, noncontact measurement is adopted, has used the ultracrystallite strip annular core with rectangular slits, with high permeability, low
Coercivity, resistance to heavy current impact, high permeability can be reduced than poor, improve transformer precision, and minimizing ratio is poor, saturation induction density
Higher than permalloy, the upper limit is close to the squareness factor that 1 lower limit is close to 0, is suitable for the inspection for making 400 to 8000Hz high-frequency currents
Survey.
2nd, introduce and linear hall element and single-chip microcomputer technology, one is the digitized filtered for realizing current detecting, and
Combine with high-speed synchronous serial communication bus, while realizing the binary digit conversion of tested electric current and transmitting.
3rd, the present invention by current sample, detect, compare, numeral transmission quaternity, it is achieved that overall most save, system is most
Excellent.
Its technical scheme is specific as follows：
A kind of AC motor control current digital sensor, by upper lid, lower cover, crystallite annular core body, pcb board, monolithic
Machine, Hall element composition, which is characterized by：
In the closing space of described upper lid and lower cover composition, crystallite annular core body, pcb board, described crystallite ring is encapsulated
Shape iron-core workpiece is the circular columns wound according to Archimedes spiral by crystallite strip, is provided with rectangular slits in circular columns；Institute
Single-chip microcomputer, Hall element being welded with the pcb board that states, being inserted in the circuit board slot that lower cover inwall is opened, Hall element is located at
Four core contact pins are finally passed through lower cover by the rectangular slits middle position of crystallite annular core body again）The contact pin of bottom portals, then
It is welded on pcb board；Four described core contact pins are respectively defined as, and "+" end is power supply+5V, and "-" end is that ground, " D " are held as serial number
According to outfan, " T " end is hour hands pulse output end, is connected with the power end and I/O pins of single-chip microcomputer respectively, and described Hall is first
Part is the linear element of three lead-foot-lines, and wherein two leads connect "+" end and "-" end, another lead-foot-line and single-chip microcomputer respectively
A/D pins be connected.
Described upper lid and lower cover are the coalition of cylinder and rectangle, and the centre bit of wherein upper lid is equipped with a cylinder
The sheath of body, the centre bit of lower cover are equipped with a centre bore, in the embedded sheath of crystallite annular core body, insert in the space of cuboid
Enter pcb board, upper lid）With hook attacker, lower cover outer wall carries pawl to outer wall, and after upper lid and lower cover close up, hook attacker is just
Tangle pawl.
Polarized plug is arranged at the lower cover bottom of described AC motor control current digital sensor, can be by wiring board side
Formula is on the circuit board of AC motor control.
Described AC motor control current digital sensor, its three-phase current cylinder to current motor controller
Out splice going splice has following restriction, i.e. three-phase current cylinder out splice going splice（16）On at least cut out induction planes, install
When, the magnetic induction plane of the magnetic induction plane on described three-phase current cylinder out splice going splice and Hall element answers keeping parallelism.
Technique effect
AC motor control proposed by the invention current digital sensor, with following significant beneficial effect：
1st, AC motor control proposed by the invention current digital sensor, employs a kind of non-contacting high current inspection
Survey technology, takes the lead in single-chip microcomputer, magnetic induction technology and digital bus communications technology integrally combine, and this is a kind of brand-new alternating current
Machine controller current digital sensor.
2nd, ingenious part of the invention is the modular construction for employing the system integration, current detecting part and data processing division
Part is all concentrated in a housing, is used as core devices by single-chip microcomputer and is implemented Coordination Treatment, and real realization is overall most to be saved, system
Optimum.
3rd, traditional constantan wire has been abandoned based on the AC motor control current digital sensor designed by the present invention
Or therefore constantan plate has also got rid of a maximum heater on AC motor control as the pattern of sampling resistor, from
And be that AC motor control radiating Topology Structure Design brings simplicity, it is that the substance of existing AC motor control is changed
Enter.
4th, traditional use ferrum has been abandoned based on the AC motor control current digital sensor designed by the present invention
Method of the silica-alumina material as front-end sampling electric current, and the ultracrystallite strip annular core with rectangular slits is the use of, have
Higher than the ferrum sial permeability, low-coercivity, resistance to heavy current impact, high magnetic permeability can be reduced than poor, improve the essence of transformer
Degree, reduces that ratio is poor, and saturation induction density is higher than permalloy, be close to 1 or be close to 0 squareness factor, be suitable for making 400 to
The detection of 8000Hz high-frequency currents.
5th, described magnetic flux detection chip is the monolithic integrated optical circuit using planar Hall sensing technology, and it can detect
Arrive parallel to chip surface due to change in magnetic flux density caused by curent change, it is elegant that described Hall element can achieve temperature
Automatically compensate, the very high linear signal of accuracy is exported by its pin, after the signal is sent in single-chip microcomputer through A/D conversions, from
And can be with the actual size of the current each phase current of accurate detection, single-chip microcomputer is by digital filtering and engineering change of variable, Ke Yizhuan
Digital signal is turned to, and realizes that the numeral of current data is transmitted by universal serial bus, with low cost, the high spy of certainty of measurement
Point.
6th, especially interesting is that AC motor control current digital sensor is that the electric current at Power Control scene is passed
Sensor, its untouchable detection for being digitized as high current, there is provided a kind of efficient, low cost and reliable digital technology solution
Certainly scheme.
Description of the drawings
Fig. 1 AC motor controls current digital sensor elevation figure；
Fig. 2 AC motor controls current digital sensor back side outline drawing；
Fig. 3 AC motor controls current digital sensor front explosive view one；
Fig. 4 AC motor controls current digital sensor front explosive view two；
Fig. 5 AC motor controls current digital sensor back side explosive view one；
Fig. 6 AC motor controls current digital sensor back side explosive view two；
Fig. 7 AC motor controls current digital sensor back side explosive view three；
Fig. 8 removes the interior view one after upper lid；
Fig. 9 removes the internal explosion view after upper lid；
AC motor control current digital sensor elevation figure after Figure 10 insertion three-phase current out splice going splices.
Label declaration：
2 lower cover of lid on 1
3 polarized plug, 4 four core contact pin
5 crystallite annular core body, 6 pcb board
7 contact pins portal 8 sheaths
9 hook 10 pawls of attacker
11 rectangular slits, 12 single-chip microcomputer
13 Hall element, 14 lower cover centre bore
15 circuit board slot, 16 three-phase current cylinder out splice going splice
17 induction planes
Specific embodiment
AC motor control of the present invention current digital sensor is as shown in Figures 1 to 10.With reference to attached
The specific embodiment of the figure explanation present invention.
A kind of AC motor control current digital sensor, by upper lid 1, lower cover 2, crystallite annular core body 5, PCB
Plate 6, single-chip microcomputer 12, Hall element 13 are constituted, and which is characterized by：
In the closing space of described upper lid 1 and the composition of lower cover 2, crystallite annular core body 5, pcb board 6 is encapsulated, described is micro-
Brilliant annular core body 5 is the circular columns wound according to Archimedes spiral by crystallite strip, is provided with rectangle and cuts in circular columns
Mouth 11；
Single-chip microcomputer 12, Hall element 13 is welded with described pcb board 6, is inserted into the circuit board slot 15 that 2 inwall of lower cover is opened
In, Hall element 13 is located at 11 middle position of rectangular slits of crystallite annular core body 5, finally passes through four core contact pins 4 again
The contact pin of 2 bottom of lower cover portals 7, then is welded on pcb board 6；
Four described core contact pins 4 are respectively defined as, and "+" end is power supply+5V, and "-" end is ground, and " D " end is serial data output terminal,
" T " end is hour hands pulse output end, is connected with the power end and I/O pins of single-chip microcomputer 12 respectively, and described Hall element 13 is
The linear element of three lead-foot-lines, wherein two leads connect "+" end and "-" end, another lead-foot-line and single-chip microcomputer 12 respectively
A/D pins are connected.
Described upper lid 1 and lower cover 2 are the coalition of cylinder and rectangle, and the centre bit for wherein going up lid 1 is equipped with one
The sheath 8 of cylinder, the centre bit of lower cover 2 are equipped with a centre bore 14, and crystallite annular core body 5 is embedded in sheath 8, cuboid
Space in insert pcb board 6,1 outer wall of upper lid with hook attacker 9,2 outer wall of lower cover carry pawl 10, upper lid 1 and lower cover 2-in-1
After holding together, hook attacker 9 just tangles pawl 10.
Polarized plug 3 is arranged at 2 bottom of lower cover of described AC motor control current digital sensor, can be by wiring board
Mode is on the circuit board of AC motor control.
Described AC motor control current digital sensor, its three-phase current cylinder to current motor controller
Out splice going splice 16 has on following restriction, i.e. three-phase current cylinder out splice going splice 16 and at least cuts out induction planes 17, pacifies
During dress, the magnetic induction plane of magnetic induction plane 17 on described three-phase current cylinder out splice going splice 16 and Hall element 13 should be protected
Fair row.
The Hall element 13 that assembling is finished, in the rectangular slits of crystallite annular core body 5（11）Middle position, due to
The induction planes 17 of three-phase current cylinder out splice going splice 16 are parallel with the magnetic induction plane of Hall element 13, therefore Hall element 13
Parallel chip surface can be detected due to change in magnetic flux density caused by curent change, internal achievable temperature drift is mended automatically
Repay, the very high linear signal of accuracy is exported by its pin, after the signal is sent in single-chip microcomputer through A/D conversions, such that it is able to
Be able to can be converted by digital filtering and engineering change of variable with the actual size of the current each phase current of accurate detection, single-chip microcomputer
For digital signal, and the numeral transmission of current data is realized by universal serial bus, with low cost, the high spy of certainty of measurement
Point.
In sum, AC motor control proposed by the invention current digital sensor, is a kind of brand-new electricity
Streaming digital sensor, is in place of its core, and it employs the modular construction of the system integration, at current detecting part and data
Reason part is all concentrated in a housing, is used as core devices by single-chip microcomputer and is implemented Coordination Treatment, has abandoned completely traditional
Sampling resistor and window comparator circuit, really realize that system is most saved, and total optimization, its application prospect are quite wide.
Claims (4)
1. a kind of AC motor control current digital sensor, by upper lid（1）, lower cover（2）, crystallite annular core body（5）、
Pcb board（6）, single-chip microcomputer（12）, Hall element（13）Composition, it is characterised in that：
Described upper lid（1）And lower cover（2）In the closing space of composition, crystallite annular core body is encapsulated（5）, pcb board（6）,
Described crystallite annular core body（5）It is the circular columns wound according to Archimedes spiral by crystallite strip, in circular columns
It is provided with rectangular slits（11）；
Described pcb board（6）On be welded with single-chip microcomputer（12）, Hall element（13）, it is inserted into lower cover（2）The circuit that inwall is opened
Board slot（15）In, Hall element（13）It is located at crystallite annular core body（5）Rectangular slits（11）Middle position, finally again will
Four core contact pins（4）Pass through lower cover（2）The contact pin of bottom portals（7）, then it is welded on pcb board（6）On；
Four described core contact pins（4）It is respectively defined as, "+" end is power supply+5V, and "-" end is that ground, " D " end are exported for serial data
End, " T " end is hour hands pulse output end, respectively with single-chip microcomputer（12）Power end be connected with I/O pins, described Hall element
（13）For the linear element of three lead-foot-lines, wherein two leads connect "+" end and "-" end, another lead-foot-line and monolithic respectively
Machine（12）A/D pins be connected.
2. AC motor control according to claim 1 current digital sensor, it is characterised in that：Described upper lid
（1）And lower cover（2）The coalition of cylinder and rectangle is, wherein upper lid（1）Centre bit be equipped with the sheath of a cylinder
（8）, lower cover（2）Centre bit be equipped with a centre bore（14）, crystallite annular core body（5）Embedded sheath（8）In, cuboid
Pcb board is inserted in space（6）, upper lid（1）Outer wall is with hook attacker（9）, lower cover（2）Outer wall carries pawl（10）, upper lid（1）
And lower cover（2）After closing up, attacker is linked up with（9）Pawl is just tangled（10）.
3. the current digital sensor of the AC motor control according to claim 1 or claim 2, its feature exist
In：Lower cover（2）Polarized plug is arranged at bottom（3）, can be by wiring board mode on the circuit board of AC motor control.
4. the current digital sensor of the AC motor control according to claim 1 or claim 2, its feature exist
In：Its three-phase current cylinder out splice going splice to current motor controller（16）There is following restriction, i.e. three-phase current cylinder is defeated
Go out joint（16）On at least cut out induction planes（17）, during installation, described three-phase current cylinder out splice going splice（16）
On magnetic induction plane（17）With Hall element（13）Magnetic induction plane answer keeping parallelism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611211850.1A CN106501594A (en) | 2016-12-25 | 2016-12-25 | AC motor control current digital sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611211850.1A CN106501594A (en) | 2016-12-25 | 2016-12-25 | AC motor control current digital sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106501594A true CN106501594A (en) | 2017-03-15 |
Family
ID=58334047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611211850.1A Pending CN106501594A (en) | 2016-12-25 | 2016-12-25 | AC motor control current digital sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106501594A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741517A (en) * | 2017-11-13 | 2018-02-27 | 湖南银河电气有限公司 | A kind of current sensor probe and its assemble method |
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| JP2002303642A (en) * | 2001-04-03 | 2002-10-18 | Stanley Electric Co Ltd | Current detector |
| US20090278526A1 (en) * | 2008-05-07 | 2009-11-12 | Toyota Jidosha Kabushiki Kaisha | Current detecting device |
| CN201514439U (en) * | 2009-10-20 | 2010-06-23 | 邱召运 | Differential Hall current sensor |
| US20110068771A1 (en) * | 2009-09-18 | 2011-03-24 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Current sensor |
| WO2013175865A1 (en) * | 2012-05-25 | 2013-11-28 | 日本航空電子工業株式会社 | Current sensor |
| CN105738685A (en) * | 2016-02-23 | 2016-07-06 | 南京中旭电子科技有限公司 | Hall current sensor of digital signal output |
| CN106199166A (en) * | 2016-07-11 | 2016-12-07 | 深圳市知用电子有限公司 | A kind of method and device of current measurement |
| CN206300995U (en) * | 2016-12-25 | 2017-07-04 | 杭州亿为科技有限公司 | AC motor control current digital sensor |
-
2016
- 2016-12-25 CN CN201611211850.1A patent/CN106501594A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002303642A (en) * | 2001-04-03 | 2002-10-18 | Stanley Electric Co Ltd | Current detector |
| US20090278526A1 (en) * | 2008-05-07 | 2009-11-12 | Toyota Jidosha Kabushiki Kaisha | Current detecting device |
| US20110068771A1 (en) * | 2009-09-18 | 2011-03-24 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Current sensor |
| CN201514439U (en) * | 2009-10-20 | 2010-06-23 | 邱召运 | Differential Hall current sensor |
| WO2013175865A1 (en) * | 2012-05-25 | 2013-11-28 | 日本航空電子工業株式会社 | Current sensor |
| CN105738685A (en) * | 2016-02-23 | 2016-07-06 | 南京中旭电子科技有限公司 | Hall current sensor of digital signal output |
| CN106199166A (en) * | 2016-07-11 | 2016-12-07 | 深圳市知用电子有限公司 | A kind of method and device of current measurement |
| CN206300995U (en) * | 2016-12-25 | 2017-07-04 | 杭州亿为科技有限公司 | AC motor control current digital sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741517A (en) * | 2017-11-13 | 2018-02-27 | 湖南银河电气有限公司 | A kind of current sensor probe and its assemble method |
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