CN206300995U - AC motor control current digital sensor - Google Patents
AC motor control current digital sensor Download PDFInfo
- Publication number
- CN206300995U CN206300995U CN201621429716.4U CN201621429716U CN206300995U CN 206300995 U CN206300995 U CN 206300995U CN 201621429716 U CN201621429716 U CN 201621429716U CN 206300995 U CN206300995 U CN 206300995U
- Authority
- CN
- China
- Prior art keywords
- crystallite
- lower cover
- core body
- motor control
- hall element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Control Of Ac Motors In General (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 it is characterized by：In the closing space of described upper lid and lower cover composition, crystallite annular core body, pcb board are 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 are welded with described pcb board, Hall element is located at the rectangular slits middle position of crystallite annular core body, the utility model 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 has been abandoned completely and has used sampling resistor and comparison circuit, really realized that system is most saved and total optimization.
Description
Technical field
The utility model is related to a kind of current digital sensor, is mainly used in Electric Vehicle's Alternating motor drive controller
Three-phase current detection 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 be detected 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 and is fought separately with electric current, for different current parameters, certainly will
Increase multiple comparison window circuits.
Described constantan is the copper alloy containing 40% nickel and 1.5% manganese, the temperature coefficient for having low-resistivity due to it,
Can typically be used within the scope of temperature wider, but due to the high resistivity of constantan, during current detecting, constantan wire or
Constantan plate as three-phase loop current sampling resistor, its heating is also extremely serious, and this disappears for the electricity of vehicle mounted dynamic battery
Consumption is totally unfavorable.
The content of the invention
Technical problem
How the defect of existing Electric Vehicle's Alternating electric machine controller current detecting is overcome, and exactly the utility model will be solved
Problem.
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, using direct measuring, constantan wire or constantan plate directly as sampling resistor, as electric machine controller three-phase
A current measuring element in current loop, due to the inborn high resistivity of constantan material, therefore during current detecting,
The heating in itself of constantan wire or constantan plate is also extremely serious, on the one hand reduces the service efficiency of battery, on the other hand also increases
The radiating cost of AC motor control.
2nd, current sample part and current comparison circuit are fought separately, and, each electric current comparison window circuit can only
One current threshold parameter of setting, for different current parameters, certainly will will increase multiple comparison window circuits, will greatly increase
The hardware detection expense of electric current.
Technical scheme
In order to overcome the defect of existing electric vehicle motor controller current detecting, the utility model proposes a kind of novel
Electric vehicle motor controller current digital sensor plan, its novelty part be：
1st, using noncontact measurement, the ultracrystallite strip annular core with rectangular slits has been used, with magnetic conduction high
Rate, low-coercivity, resistance to heavy current impact, high permeability can be reduced than poor, improve transformer precision, and reduction ratio is poor, saturation magnetic strength
Answer intensity higher than permalloy, the upper limit is adapted to make 400 to 8000Hz high-frequency currents close to 1 lower limit close to 0 squareness factor
Detection.
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 utility model by current sample, detect, compare, numeral transmission quaternity, realize it is overall most save, system
It is optimal.
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,
Single-chip microcomputer, Hall element composition, it is characterized by：
In the closing space of described upper lid and lower cover composition, crystallite annular core body, pcb board are encapsulated, described is micro-
Brilliant annular core body is the circular columns wound according to Archimedes spiral by crystallite strip, rectangle is provided with circular columns and is cut
Mouthful；Single-chip microcomputer, Hall element are welded with described pcb board, are inserted into the circuit board slot that lower cover inwall is opened, Hall element
Positioned at the rectangular slits middle position of crystallite annular core body, four core contact pins are finally passed through into lower cover again）The contact pin of bottom goes out
Hole, then be welded on pcb board；Four described core contact pins 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 respectively, described
Hall element is three linear elements of lead-foot-line, wherein two leads connect "+" end and "-" end respectively, another lead-foot-line with
The A/D pins of single-chip microcomputer are connected.
Described upper lid and lower cover are the combination of cylinder and rectangle, wherein the centre bit of upper lid is equipped with a cylinder
The sheath of body, the centre bit of lower cover is equipped with a centre bore, in crystallite annular core body insertion sheath, is inserted 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 arranged 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 limitation, i.e. three-phase current cylinder out splice going splice（16）On at least cut out an induction planes, install
When, the magnetic induction plane on described three-phase current cylinder out splice going splice answers keeping parallelism with the magnetic induction plane of Hall element.
Technique effect
The AC motor control that the utility model is proposed current digital sensor, with following significant beneficial effect
Really：
1st, the AC motor control that the utility model is proposed current digital sensor, employs a kind of non-contacting
Checking of great current technology, takes the lead in integrally combining single-chip microcomputer, magnetic induction technology and digital bus communications technology, and this is a kind of brand-new
AC motor control current digital sensor.
2nd, the ingenious part of the utility model is the modular construction for employing the system integration, at current detecting part and data
Reason part is all concentrated in a housing, and being used as core devices by single-chip microcomputer implements Coordination Treatment, real to realize that entirety is most saved,
System optimal.
3rd, traditional health has been abandoned based on the AC motor control current digital sensor designed by the utility model
Copper wire or constantan plate therefore have also got rid of a heating for maximum on AC motor control as the pattern of sampling resistor
Body, so as to be the reality to existing AC motor control for AC motor control radiating Topology Structure Design brings simplicity
Matter is improved.
4th, traditional making has been abandoned based on the AC motor control current digital sensor designed by the utility model
With iron silica-alumina material as the method for front-end sampling electric current, and the ultracrystallite strip annular core with rectangular slits is the use of,
With permeability, the low-coercivity higher than iron sial, resistance to heavy current impact, high magnetic permeability can be reduced than poor, improve transformer
Precision, it is poor to reduce ratio, saturation induction density higher than permalloy, close to 1 or close to 0 squareness factor, be adapted to make 400
To the detection of 8000Hz high-frequency currents.
5th, described magnetic flux detection chip is that it can be detected using the monolithic integrated optical circuit of planar Hall sensing technology
To parallel to chip surface, due to change in magnetic flux density caused by curent change, described Hall element can realize that temperature is elegant
Automatic compensation, degree of accuracy linear signal very high is exported by its pin, and the signal is sent in single-chip microcomputer after being changed through A/D, 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
Data signal is turned to, and the numeral transmission of current data is realized by universal serial bus, with low cost, certainty of measurement spy high
Point.
6th, specifically, the electric current that AC motor control current digital sensor is 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.
Brief 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：
The lower cover of lid 2 on 1
The core contact pin of 3 polarized plug 4 four
The pcb board of 5 crystallite annular core body 6
7 contact pins portal 8 sheaths
The 9 hook pawls of attacker 10
The single-chip microcomputer of 11 rectangular slits 12
The lower cover centre bore of 13 Hall element 14
The three-phase current cylinder out splice going splice of 15 circuit board slot 16
17 induction planes
Specific embodiment
AC motor control described in the utility model current digital sensor is as shown in Figures 1 to 10.Tie below
Close brief description of the drawings specific embodiment of the present utility model.
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 it 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, it is described
Crystallite annular core body 5 be the circular columns wound according to Archimedes spiral by crystallite strip, square is provided with circular columns
Shape otch 11；
Single-chip microcomputer 12, Hall element 13 are welded with described pcb board 6, the circuit board slot that the inwall of lower cover 2 is opened is inserted into
In 15, Hall element 13 is located at the middle position of rectangular slits 11 of crystallite annular core body 5, finally again wears four core contact pins 4
The contact pin for crossing the bottom of lower cover 2 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 defeated for serial data
Go out end, " T " end is hour hands pulse output end, is connected with the power end and I/O pins of single-chip microcomputer 12 respectively, described Hall element
13 is three linear elements of lead-foot-line, wherein two leads connect "+" end and "-" end, another lead-foot-line and single-chip microcomputer respectively
12 A/D pins are connected.
Described upper lid 1 and lower cover 2 is the combination of cylinder and rectangle, wherein the centre bit of upper lid 1 is equipped with one
The sheath 8 of cylinder, the centre bit of lower cover 2 is equipped with a centre bore 14, in the insertion sheath 8 of crystallite annular core body 5, cuboid
Space in insert pcb board 6, the outer wall of upper lid 1 with hook attacker 9, the outer wall of lower cover 2 carry pawl 10, upper lid 1 and lower cover are 2-in-1
After holding together, hook attacker 9 just tangles pawl 10.
Polarized plug 3 is arranged at the bottom of lower cover 2 of described AC motor control current digital sensor, can be by wiring board
Mode is arranged 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 an induction planes 17 is at least cut out on following limitation, i.e. three-phase current cylinder out splice going splice 16, pacifies
During dress, the magnetic induction plane 17 on described three-phase current cylinder out splice going splice 16 should be protected with the magnetic induction plane of Hall element 13
Maintain an equal level row.
The Hall element 13 that assembling is finished, the rectangular slits in 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, the achievable temperature drift in inside is mended automatically
Repay, degree of accuracy linear signal very high is exported by its pin, the signal is sent in single-chip microcomputer after being changed through A/D, 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
It is data signal, and the numeral transmission of current data is realized by universal serial bus, with low cost, certainty of measurement spy high
Point.
In sum, the AC motor control current digital sensor that the utility model is proposed, is a kind of brand-new
Current digital sensor, its core part be that it employs the modular construction of the system integration, current detecting part sum
All concentrated on according to processing component in a housing, core devices are used as by single-chip microcomputer and implement Coordination Treatment, biography has been abandoned completely
The sampling resistor and window comparator circuit of system, really realize that system is most saved, and total optimization, its application prospect is 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）Positioned at crystallite annular core body（5）Rectangular slits（11）Middle position, finally again will
Four core contact pins（4）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, "-" end is ground, and " D " end exports 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）It is three linear elements of lead-foot-line, 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 combination of cylinder and rectangle is, wherein upper lid（1）Centre bit be equipped with a sheath for 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）Just tangle pawl（10）.
3. the current digital sensor of the AC motor control according to claim 1 or claim 2, its feature exists
In：Lower cover（2）Polarized plug is arranged at bottom（3）, can be arranged on the circuit board of AC motor control by wiring board mode.
4. the current digital sensor of the AC motor control according to claim 1 or claim 2, its feature exists
In：Its three-phase current cylinder out splice going splice to current motor controller（16）There is following limitation, i.e. three-phase current cylinder is defeated
Go out joint（16）On at least cut out an 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 |
|---|---|---|---|
| CN201621429716.4U CN206300995U (en) | 2016-12-25 | 2016-12-25 | AC motor control current digital sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621429716.4U CN206300995U (en) | 2016-12-25 | 2016-12-25 | AC motor control current digital sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206300995U true CN206300995U (en) | 2017-07-04 |
Family
ID=59204160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621429716.4U Active CN206300995U (en) | 2016-12-25 | 2016-12-25 | AC motor control current digital sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206300995U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501594A (en) * | 2016-12-25 | 2017-03-15 | 杭州亿为科技有限公司 | AC motor control current digital sensor |
| 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 |
-
2016
- 2016-12-25 CN CN201621429716.4U patent/CN206300995U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501594A (en) * | 2016-12-25 | 2017-03-15 | 杭州亿为科技有限公司 | AC motor control current digital sensor |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202886462U (en) | Electricity stealing detection device capable of preventing external strong magnetic interference | |
| CN206300995U (en) | AC motor control current digital sensor | |
| CN205355795U (en) | Detect device and IGBT protection circuit of IGBT BUS capacitors electric current | |
| CN106501594A (en) | AC motor control current digital sensor | |
| CN208721739U (en) | Single-phase electric energy metering device with defencive function | |
| CN202631627U (en) | Strong electromagnetic field resistant intelligent ammeter | |
| CN211402505U (en) | Single-phase intelligent electric meter capable of detecting reverse connection of live wire and zero line | |
| CN208835323U (en) | Light current terminal bindiny mechanism and electric energy metering device | |
| CN203287768U (en) | CAN bus control system of brushless direct current motor | |
| CN105453403B (en) | Power inverter | |
| CN201993411U (en) | General high speed synchronous high voltage signal isolation regulation module | |
| CN206976723U (en) | A kind of temperature monitoring formula automatic alarm, power off socket | |
| CN105353181A (en) | Electric power metering device | |
| CN213933999U (en) | On-cable control protection device and residual current and charging current monitoring module thereof | |
| CN202475985U (en) | Water-proof power box | |
| CN211697948U (en) | Voltage induction probe | |
| CN203673952U (en) | Current transformer for intelligent electric meter | |
| CN203166791U (en) | Insulated power source box capable of automatically correcting phase sequence | |
| CN204117777U (en) | Hall current sensor and magnet ring thereof | |
| CN210071918U (en) | Mutual inductor structure with self-checking port | |
| CN201708751U (en) | Motor controller of electric vehicle | |
| CN202930168U (en) | A mutual inductor comprising connecting wires | |
| CN202548189U (en) | Current acquisition device for photovoltaic (PV) bus | |
| CN208618951U (en) | A kind of Intelligent key crypto chip | |
| CN211826440U (en) | Cable joint synthesizes supervisory equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210526 Address after: 311100 1101-1, building 12, Saiyin international business center, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: HANGZHOU RONGDA ZHIZAO TECHNOLOGY Co.,Ltd. Address before: 18f-h, 173 Yugu Road, Xihu District, Hangzhou, Zhejiang 310007 Patentee before: HANGZHOU YIWEI TECHNOLOGY Co.,Ltd. |