CN112834813A - Hall current sensor chip for electric automobile - Google Patents
Hall current sensor chip for electric automobile Download PDFInfo
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- CN112834813A CN112834813A CN202110012331.7A CN202110012331A CN112834813A CN 112834813 A CN112834813 A CN 112834813A CN 202110012331 A CN202110012331 A CN 202110012331A CN 112834813 A CN112834813 A CN 112834813A
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- 238000003745 diagnosis Methods 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 19
- 230000008030 elimination Effects 0.000 claims description 6
- 238000003379 elimination reaction Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
Abstract
The invention belongs to the technical field of Hall current sensor chips, and particularly relates to a Hall current sensor chip for an electric automobile. The invention carries out filtering processing on the signals collected by the Hall element module through the filter, can effectively filter interference parts in the signals, then converts the signals processed by the filter into digital signals under the use of the analog-to-digital conversion unit, compares the numbers by the diagnosis reset circuit, compares the input signals with the threshold set by the corresponding resistance ratio partial pressure, can effectively carry out fault latch on the comparison result of the overrun signals, and can reset the fault latch according to the reset signals output by the main control unit, thereby ensuring that the circuit can normally work when the input signals are in the design range.
Description
Technical Field
The invention relates to the technical field of Hall current sensor chips, in particular to a Hall current sensor chip for an electric automobile.
Background
The new energy automobile current sensor signal has a very critical effect in a motor control system, and the signal directly reflects the magnitude of the motor torque. The new energy motor controller needs to detect torque signals, rotating speed signals, motor position signals and other information in real time to adjust and drive output so as to control the whole vehicle.
At present, the output signal of the current sensor for the vehicle is an analog signal, but in a complex electromagnetic environment of the vehicle, the analog signal is easily subjected to electromagnetic interference, so that the sensor is extremely unstable when transmitting signals, and further the transmission quality of the signals is easily influenced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a Hall current sensor chip for an electric automobile, which solves the problems that the existing Hall current sensor chip is easily subjected to electromagnetic interference when transmitting signals, and the internal circuit of the chip is easily damaged and the normal work of the internal circuit of the chip is influenced when the current is overlarge.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a Hall current sensor chip for an electric automobile comprises a power supply module, a Hall element module, a filter, a constant current compensation unit, an analog-to-digital conversion unit, a diagnosis reset unit, a communication unit and a main control unit, wherein the diagnosis reset unit comprises a comparison module and a reset module;
the output end of the power supply module is electrically connected with the input end of the Hall element module, the input ends of the Hall element module are electrically connected with the filter and the output end of the constant current compensation current, the input end of the filter is electrically connected with the output end of the analog-to-digital conversion unit, the input end of the analog-to-digital conversion unit is electrically connected with the output end of the reset unit, and the input end of the analog-to-digital conversion unit is electrically connected with the output end of the main control unit;
the power supply module provides power for the chip to realize circuit connection among the Hall element module, the filter, the constant current compensation unit, the analog-to-digital conversion unit, the diagnosis reset unit, the communication unit and the main control unit, the Hall element module is used for collecting external current, the filter is used for filtering current signals collected by the Hall element module, the constant current compensation current provides constant driving current for the Hall element module, and constant current compensation is carried out on the Hall element module, the analog-to-digital conversion unit converts the filtering signal processed by the filter into a digital signal, the diagnosis reset unit compares the digital signal with a preset signal range, generates a corresponding signal diagnosis result based on the comparison result, and the main control unit can carry out fault elimination and normal recovery diagnosis on the signal diagnosis result.
As a preferred technical solution of the present invention, the input ends of the comparison module and the reset module are electrically connected to the output end of the main control unit, the main control unit can receive related control instructions and signals to the reset module and the comparison module, the comparison module is used for comparing signal values acquired by the chip, and the control module controls the reset module to perform fault elimination and reset on a signal diagnosis result.
As a preferred technical solution of the present invention, the communication unit is used for communication connection between the chip internal component and an external device, and the communication unit adopts one or more of RS485, RS232, or wireless GPRS communication modes.
As a preferred technical scheme of the invention, the main control unit is a single chip microcomputer, and the model of the single chip microcomputer is AT 51.
As a preferable technical scheme of the invention, the voltage range provided by the power supply module is 20-50Vdc, and the current signal output by the analog-to-digital conversion unit is a standard signal of 4-20 mA.
As a preferred technical scheme of the invention, the model of the Hall element module is an ACS714 series chip, and the measuring range reaches 50A.
(III) advantageous effects
Compared with the prior art, the invention provides the Hall current sensor chip for the electric automobile, which has the following beneficial effects:
this a hall current sensor chip for electric automobile, carry out filtering process through the wave filter to the signal of hall element module collection, interference part in can effective filtering signal, make the signal that this hall element was gathered more stable at the in-process of transmission, the stability of signal when the transmission has been guaranteed, then under analog-to-digital conversion unit's use, the signal conversion who handles the wave filter is digital signal, diagnosis reset circuit compares the digit, compare the threshold that input signal and corresponding resistance ratio partial pressure set up, and can effectively carry out the trouble latch to the comparative result of overrun signal, and can reset to the trouble latch according to the reset signal of main control unit output, when guaranteeing that input signal is in the design range, the circuit can normally work, the life of this chip has been protected, the practicality is stronger.
Drawings
Fig. 1 is a block diagram of a hall current sensor chip for an electric vehicle according to the present invention.
In the figure: 1. a power supply module; 2. a Hall element module; 3. a filter; 4. a constant current compensation unit; 5. an analog-to-digital conversion unit; 6. a diagnostic reset unit; 601. a comparison module; 602. a reset module; 7. a communication unit; 8. and a main control unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1, the present invention provides the following technical solutions: a Hall current sensor chip for an electric automobile comprises a power supply module 1, a Hall element module 2, a filter 3, a constant current compensation unit 4, an analog-to-digital conversion unit 5, a diagnosis reset unit 6, a communication unit 7 and a main control unit 8, wherein the diagnosis reset unit 6 comprises a comparison module 601 and a reset module 602;
the output end of the power supply module 1 is electrically connected with the input end of the Hall element module 2, the input ends of the Hall element module 2 are electrically connected with the filter 3 and the output end of the constant current compensation current 4, the input end of the filter 3 is electrically connected with the output end of the analog-to-digital conversion unit 5, the input end of the analog-to-digital conversion unit 5 is electrically connected with the output end of the reset unit 6, and the input end of the analog-to-digital conversion unit 5 is electrically connected with the output end of the main control unit 8;
the power supply module 1 provides power for the chip, so that circuit connection among the Hall element module 2, the filter 3, the constant current compensation unit 4, the analog-to-digital conversion unit 5, the diagnosis reset unit 6, the communication unit 7 and the main control unit 8 is realized, the Hall element module 2 is used for collecting and external current, the filter 3 carries out filtering processing on current signals collected by the Hall element module 2, the constant current compensation current 4 provides constant driving current for the Hall element module 2, constant current compensation is carried out on the Hall element module 2, the analog-to-digital conversion unit 5 converts the filtering signal processed by the filter 3 into a digital signal, the diagnosis reset unit 6 compares the digital signal with a preset signal range, a corresponding signal diagnosis result is generated based on the comparison result, and sending to the main control unit 8, and the main control unit 8 can perform fault elimination and normal restoration diagnosis on the signal diagnosis result.
Specifically, the input ends of the comparison module 601 and the reset module 602 are electrically connected to the output end of the main control unit 8, the main control unit 8 can receive relevant control instructions and signals to the reset module 602 and the comparison module 601, the comparison module 601 is used for comparing signal values acquired by a chip, and the control module 601 controls the reset module 602 to perform fault elimination and reset on a signal diagnosis result.
Specifically, the communication unit 7 is used for communication connection between internal elements of the chip and external devices, and the communication unit 7 adopts one or more of RS485, RS232 or wireless GPRS communication modes.
Specifically, the main control unit 8 is a single chip microcomputer, and the model of the single chip microcomputer is AT 51.
Specifically, the voltage range provided by the power supply module 1 is 20-50Vdc, and the current signal output by the analog-to-digital conversion unit 5 is a standard signal of 4-20 mA.
Specifically, the hall element module 2 is an ACS714 chip, and the measurement range reaches 50A.
In this embodiment, after the analog signal output by the hall chip module 2 of the current sensor chip is converted into a digital signal through the analog-to-digital conversion unit 5, after signal interference is filtered through the filter 3, it is more stable when the hall element module 2 transmits signals to ensure that the electromagnetic interference received by the signals in the transmission process is effectively reduced, the transmission quality of the signals is improved, a stable constant current is provided for the hall chip module 2 through the constant current compensation current 4, the stability of the chip in use is improved, the diagnosis and reset unit 6 is favorable for performing fault diagnosis and reset on the overlarge current of the chip, so that the chip can normally work when in use, and the protection performance of the chip is enhanced.
The Hall current sensor chip for the electric automobile in the embodiment of the invention can effectively filter the interference part in the signal by filtering the signal acquired by the Hall element module through the filter, the signal collected by the Hall element is more stable in the transmission process, the stability of the signal in the transmission process is ensured, then, under the use of the analog-digital conversion unit, the signal processed by the filter is converted into a digital signal, the diagnosis reset circuit compares the digital signal with the threshold set by the corresponding resistance ratio voltage division, the fault latch can be effectively carried out on the comparison result of the overrun signal, and the fault latch can be reset according to the reset signal output by the main control unit, so that when the input signal is within the design range, the circuit can normally work, the service life of the chip is protected, and the practicability is higher.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a hall current sensor chip for electric automobile which characterized in that: the device comprises a power supply module (1), a Hall element module (2), a filter (3), a constant current compensation unit (4), an analog-to-digital conversion unit (5), a diagnosis reset unit (6), a communication unit (7) and a main control unit (8), wherein the diagnosis reset unit (6) comprises a comparison module (601) and a reset module (602);
the output end of the power supply module (1) is electrically connected with the input end of the Hall element module (2), the input ends of the Hall element module (2) are electrically connected with the filter (3) and the output end of the constant current compensation current (4), the input end of the filter (3) is electrically connected with the output end of the analog-to-digital conversion unit (5), the input end of the analog-to-digital conversion unit (5) is electrically connected with the output end of the reset unit (6), and the input end of the analog-to-digital conversion unit (5) is electrically connected with the output end of the main control unit (8);
the power supply module (1) provides power for a chip, circuit connection among the Hall element module (2), the filter (3), the constant current compensation unit (4), the analog-to-digital conversion unit (5), the diagnosis reset unit (6), the communication unit (7) and the main control unit (8) is realized, the Hall element module (2) is used for collecting and processing external current, the filter (3) carries out filtering processing on current signals collected by the Hall element module (2), the constant current compensation current (4) provides constant driving current for the Hall element module (2) and carries out constant current compensation on the Hall element module (2), the analog-to-digital conversion unit (5) converts filtering signals processed by the filter (3) into digital signals, the diagnosis reset unit (6) compares the digital signals with a preset signal range and generates corresponding signal diagnosis results based on the comparison results, and sending the signal to a main control unit (8), wherein the main control unit (8) can perform fault elimination and normal recovery diagnosis on the signal diagnosis result.
2. The hall current sensor chip for the electric vehicle according to claim 1, wherein: the input of comparison module (601) and reset module (602) all with the output electric connection of main control unit (8), main control unit (8) can carry out relevant control command and signal reception to reset module (602) and comparison module (601), comparison module (601) are used for comparing the signal value that the chip was gathered, carry out trouble elimination and reset through control module (601) control reset module (602) to the signal diagnosis result.
3. The hall current sensor chip for the electric vehicle according to claim 1, wherein: the communication unit (7) is used for the communication connection between the chip internal elements and external equipment, and the communication unit (7) adopts one or more of RS485, RS232 or wireless GPRS communication modes.
4. The hall current sensor chip for the electric vehicle according to claim 1, wherein: the main control unit (8) is a single chip microcomputer, and the model of the single chip microcomputer is AT 51.
5. The hall current sensor chip for the electric vehicle according to claim 1, wherein: the voltage range provided by the power supply module (1) is 20-50Vdc, and the current signal output by the analog-to-digital conversion unit (5) is a standard signal of 4-20 mA.
6. The hall current sensor chip for the electric vehicle according to claim 1, wherein: the Hall element module (2) is an ACS714 series chip, and the measuring range reaches 50A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110012331.7A CN112834813A (en) | 2021-01-06 | 2021-01-06 | Hall current sensor chip for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110012331.7A CN112834813A (en) | 2021-01-06 | 2021-01-06 | Hall current sensor chip for electric automobile |
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| Publication Number | Publication Date |
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| CN112834813A true CN112834813A (en) | 2021-05-25 |
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| CN202110012331.7A Pending CN112834813A (en) | 2021-01-06 | 2021-01-06 | Hall current sensor chip for electric automobile |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100008986A (en) * | 2008-07-17 | 2010-01-27 | 김태용 | Digital current sensors |
| CN105067874A (en) * | 2015-07-29 | 2015-11-18 | 国核自仪系统工程有限公司 | Switching output self-diagnosis circuit |
| CN105372550A (en) * | 2015-12-10 | 2016-03-02 | 国网四川省电力公司电力科学研究院 | Intelligent communication power source monitoring device |
| 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 |
| CN109900951A (en) * | 2019-02-19 | 2019-06-18 | 中国第一汽车股份有限公司 | A kind of processing of new-energy automobile current sensor signal and diagnostic circuit |
| CN110488082A (en) * | 2019-07-12 | 2019-11-22 | 宁波中车时代传感技术有限公司 | A kind of measure voltage & current chip of integrated numeral output |
| CN110687347A (en) * | 2019-09-26 | 2020-01-14 | 西安航天计量测试研究所 | Hall current sensor with temperature compensation and temperature compensation method thereof |
| CN112147401A (en) * | 2020-10-22 | 2020-12-29 | 深圳学泰科技有限公司 | Current detection circuit based on Hall current sensor |
-
2021
- 2021-01-06 CN CN202110012331.7A patent/CN112834813A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100008986A (en) * | 2008-07-17 | 2010-01-27 | 김태용 | Digital current sensors |
| CN105067874A (en) * | 2015-07-29 | 2015-11-18 | 国核自仪系统工程有限公司 | Switching output self-diagnosis circuit |
| CN105372550A (en) * | 2015-12-10 | 2016-03-02 | 国网四川省电力公司电力科学研究院 | Intelligent communication power source monitoring device |
| 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 |
| CN109900951A (en) * | 2019-02-19 | 2019-06-18 | 中国第一汽车股份有限公司 | A kind of processing of new-energy automobile current sensor signal and diagnostic circuit |
| CN110488082A (en) * | 2019-07-12 | 2019-11-22 | 宁波中车时代传感技术有限公司 | A kind of measure voltage & current chip of integrated numeral output |
| CN110687347A (en) * | 2019-09-26 | 2020-01-14 | 西安航天计量测试研究所 | Hall current sensor with temperature compensation and temperature compensation method thereof |
| CN112147401A (en) * | 2020-10-22 | 2020-12-29 | 深圳学泰科技有限公司 | Current detection circuit based on Hall current sensor |
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Application publication date: 20210525 |