CN202305632U - A Hall current sensor having double Hall elements and automobile power system adopting the Hall current sensor having the double Hall elements - Google Patents
A Hall current sensor having double Hall elements and automobile power system adopting the Hall current sensor having the double Hall elements Download PDFInfo
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- CN202305632U CN202305632U CN2011203710381U CN201120371038U CN202305632U CN 202305632 U CN202305632 U CN 202305632U CN 2011203710381 U CN2011203710381 U CN 2011203710381U CN 201120371038 U CN201120371038 U CN 201120371038U CN 202305632 U CN202305632 U CN 202305632U
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Abstract
The utility model relates to current measuring technique and automobile power supply technique and especially relates to a Hall current sensor having double Hall elements and automobile power system adopting the Hall current sensor having the double Hall elements. In the utility model, the Hall current sensor having the double Hall elements includes an iron core surrounded with a first air gap and a second air gap; a first Hall element arranged in the first air gap; a second Hall element arranged in the second air gap; and an amplifying circuit coupled with the first Hall element and the second Hall element. Output terminals of the first Hall element and the second Hall element are firstly coupled together in parallel and then coupled with an input terminal of the amplifying circuit. In one embodiment of the utility model, by adopting the Hall elements connected in parallel, the saturation of the iron core is avoided well and eddy-current and magnetic hysteresis loss are reduced in the meantime of remaining an advantage of simple structure of a direction current sensor. Besides, according to power supply types having different electric characteristics, the measuring precision can be improved further by adopting different air gap layouts.
Description
Technical field
The utility model relates to current measurement techniques and automobile power source technology, particularly a kind of Hall current sensor and the automobile power system that comprises this sensor with two Hall elements.
Background technology
The complicated service condition of vehicle often makes that the electricity consumption load variations is bigger, and this causes the output power of vehicle power supply also to have greatly changed thereupon.If the output current of power supply is not controlled, will cause the heating of power supply overload, may damage power supply when serious.Therefore, take place, must the generator output current of automobile power system be detected accurately and control in order to prevent above-mentioned situation.
Super-Current Measurement equipment commonly used comprises that to measure the magnetic field that tested electric current produced be basic Hall current sensor.Hall current sensor is processed according to hall principle, and it comprises two types, i.e. direct amplifier system current sensor and magnetic balance type current sensor.The direct amplifier system current sensor utilizes Hall element to detect the magnetic induction density in the air gap unshakable in one's determination; It has advantage of simple structure; But when tested electric current increased, iron core possibly reach capacity, along with frequency raises; Eddy current loss in the iron core and magnetic hysteresis loss also can increase, and this all will influence the precision of sensor.In the magnetic balance type current sensor; Hall element is in zero magnetic flux state, and the magnetic induction density in the iron core is extremely low, and iron core can be unsaturated; Eddy current loss and magnetic hysteresis loss are also very little; Thereby the fine shortcoming that overcomes the direct amplifier system current sensor, but the weak point of this sensor is the circuit more complicated, causes cost higher.
Therefore need a kind of Hall current sensor that can have direct amplifier system current sensor and the two advantage of magnetic balance type current sensor concurrently.
The utility model content
A purpose of the utility model provides a kind of Hall current sensor, and it has simple in structure but advantage of high precision.
Above-mentioned purpose can be realized by following technical proposals.
A kind of Hall current sensor comprises:
Iron core is provided with first and second air gaps along its periphery;
First Hall element, it is arranged in said first air gap;
Second Hall element, it is arranged in the said interstice; And
Amplifying circuit, itself and said first and second Hall elements are coupled, and wherein, the input end with said amplifying circuit after said first and second Hall elements output terminal parallel coupled separately is coupled.
Preferably, in above-mentioned Hall current sensor, said iron core is the shape of annulus, and more preferably, said first and second air gaps are set at the two ends of the diameter of said annulus.
Perhaps preferably, in above-mentioned Hall current sensor, the shape of the rectangular ring of said iron core, more preferably, said first and second air gaps are set at same one side of said straight-flanked ring.
The purpose that also has of the utility model provides a kind of automobile power system, and it adopts Hall current sensor simple in structure but that precision is high, thereby has realized the accurate control to power supply.
Above-mentioned purpose can be realized by following technical proposals.
A kind of automobile power system comprises:
Generator;
First accumulator, itself and said generator parallel coupled are to form current supply circuit;
Second accumulator, itself and starter parallel coupled start the loop to form; And
Control module, it is coupling between said current supply circuit and the said startup loop;
First, second and the 3rd Hall current sensor are separately positioned near the transmission pressure of said generator and first, second accumulator, and each said Hall current sensor comprises:
Be suitable for iron core that said transmission pressure is passed, first and second air gaps be set along its periphery;
First Hall element, it is arranged in said first air gap;
Second Hall element, it is arranged in the said interstice; And
Input end with said amplifying circuit after the amplifying circuit, said first and second Hall elements output terminal parallel coupled separately is coupled, the output terminal of said amplifying circuit and the coupling of said control module.
Preferably, in above-mentioned automobile power system, further comprise the full-wave bridge that is arranged between said generator and the automobile load, said first Hall current sensor is arranged on the said transmission line of electricity part between said full-wave bridge and the load.
Preferably, in above-mentioned automobile power system, said first and the iron core of the 3rd Hall current sensor be the shape of annulus, said first and second air gaps are set at the two ends of the diameter of said annulus.
Preferably, in above-mentioned automobile power system, said first and the shape of the rectangular ring unshakable in one's determination of the 3rd Hall current sensor, said first and second air gaps are set at the relative edge of said straight-flanked ring.
Preferably, in above-mentioned automobile power system, the shape of the rectangular ring unshakable in one's determination of said second Hall current sensor, said first and second air gaps are set at same one side of said straight-flanked ring.
According to the embodiment of the utility model, through adopting the Hall element of parallel connection, can when keeping direct amplifier system current sensor advantage simple in structure, avoid the saturated of iron core well, reduce eddy current loss and magnetic hysteresis loss.In addition, in the embodiment of the utility model,, can further improve measuring accuracy through adopting different air gap layouts for the power supply type of different electrical specifications.
From the following detailed description that combines accompanying drawing, will make the above-mentioned of the utility model clear more fully with other purpose and advantage.
Description of drawings
Fig. 1 is the synoptic diagram according to the Hall current sensor of an embodiment of the utility model.
Fig. 2 is the synoptic diagram of two Hall element parallel circuits in the Hall current sensor shown in Figure 1.
Fig. 3 a, 3b and 3c show the layout according to the air gap unshakable in one's determination of the different embodiment of the utility model respectively.
Fig. 4 is the block diagram according to the automobile power system of an embodiment of the utility model.
Fig. 5 is the block diagram according to the automobile power system of another embodiment of the utility model.
Embodiment
Through being described with reference to the drawings, embodiment sets forth this practicality below.But it will be appreciated that these embodiments only are exemplary, do not have restriction for the spirit and the protection domain of the utility model.
In this manual; " coupling " speech is to be understood that the situation that directly transmits energy or signal between two unit for being included in; Perhaps transmit the situation of energy or signal indirectly, and alleged signal includes but not limited to the signal that the form with electricity, light and magnetic exists here through one or more Unit the 3rd.In addition; " comprise " and the term of " comprising " and so on represent except have in instructions and claims, have directly with the unit of clearly statement with the step, technical scheme of the present invention is not got rid of yet and is had not by directly or other unit of clearly explaining and the situation of step.Moreover the term such as " first ", " second ", " the 3rd " and " the 4th " does not represent that unit or numerical value only are the usefulness of making to distinguish each unit or numerical value in the order of aspects such as time, space, size.
Fig. 1 is the synoptic diagram according to the Hall current sensor of an embodiment of the utility model.
Referring to Fig. 1, Hall current sensor 10 comprises 110, the first and second Hall element 120a unshakable in one's determination and 120b and amplifying circuit 130.
Unshakable in one's determination 110 in the form of a ring, and transmission pressure 11 passes center hole.When electric current I m flows through transmission pressure 11, will near transmission pressure 11, produce magnetic field.This magnetic field is concentrated in 110 peripheries unshakable in one's determination and goes up first and second air gap 110a and the 110b that are provided with.As shown in Figure 1, the first and second Hall element 120a and 120b are arranged in above-mentioned first and second air gap 110a and the 110b.In order to improve sensitivity, the first and second Hall element 120a and 120b should be positioned at air gap in whole surface.
In the embodiment of the utility model, the output terminal of the first and second Hall element 120a and 120b elder generation parallel coupled, and then be coupled to the input end of amplifying circuit 130.Fig. 2 shows the synoptic diagram of this pair of Hall element parallel circuit.Referring to Fig. 2, when the Hall element parallel connection is used, be equivalent to their output voltage and output resistance series connection parallel connections more afterwards separately, the Hall voltage V after the parallel connection
HSatisfy following relationship:
Here, V
H1And V
H2Be respectively the output voltage of first and second Hall elements, R
1And R
2Be respectively the resistance value of first and second Hall elements.
When selecting the Hall element that specification is identical and the resistance discreteness is less for use, R
1And R
2Near equal, so following formula (1) can be reduced to:
In the embodiment of the utility model, amplifying circuit 130 can adopt differential amplifier to realize, one of them input end of differential amplifier is coupled with the parallelly connected output of two Hall elements.On the other hand, the analog output signal of differential amplifier can be delivered to peripheral control unit, the control module in the automobile power system for example, and perhaps this output signal sends to peripheral control unit after the coding circuit (not shown) is encoded to digital signal.
Fig. 3 a, 3b and 3c show the layout according to the air gap unshakable in one's determination of the different embodiment of the utility model respectively.
In the embodiment shown in Fig. 3 a, unshakable in one's determination 110 are the shape of annulus.The inventor of the utility model is through discovering, when the electric current when the center hole of iron core in the big or transmission pressure is big, air gap is arranged on periphery unshakable in one's determination symmetrically can eliminates transmission pressure effectively and depart from the caused measuring error in center unshakable in one's determination.Therefore, in the present embodiment, the first and second air gap 110a and 11b are set at the two ends of the diameter of annulus.
In the embodiment shown in Fig. 3 b, the shape of 110 rectangular rings unshakable in one's determination.Equally, when the electric current in the big perhaps transmission pressure of center hole of iron core is big,, then also can eliminates transmission pressure effectively and depart from the caused measuring error in center unshakable in one's determination if air gap is provided with respect to the straight-flanked ring center symmetrically.Therefore, shown in Fig. 3 b, in the present embodiment, the first and second air gap 110a and 11b are set on the relative edge of straight-flanked ring.
In the embodiment shown in Fig. 3 c, iron core 110 is the shape of rectangular ring also.The inventor of the utility model is through discovering; Electric current when the center hole of iron core in the less or transmission pressure hour; When the first and second air gap 110a and 11b being arranged on same one side periphery unshakable in one's determination of straight-flanked ring shown in Fig. 3 c; Transmission pressure departs from the caused measuring error in center unshakable in one's determination and little, but this layout can be saved installing space.
Fig. 4 is the block diagram according to the automobile power system of an embodiment of the utility model.
Referring to Fig. 4, automobile power system 40 comprises control module 410, generator 420, the first and second accumulator 430a and 430b and first, second and the 3rd Hall current sensor 440a, 440b, 440c.The generator 420 and the first accumulator 430a parallel coupled are with the formation current supply circuit, and the second accumulator 430b and starter parallel coupled start the loop to form.Control module 410 is coupling in current supply circuit and starts between the loop.In Fig. 4, heavy line is represented power or energy stream, and fine line is represented control signal and measuring-signal stream.
Referring to Fig. 4; Control module 410 is cores of whole power-supply system 40, and it is responsible for according to definite suitable electric energy management strategies such as electricity consumption situation (the for example need for electricity of starter 41 and electricity consumption device 42), battery condition (for example be here in working current, WV, temperature, degree of aging and the state-of-charge (SOC) of the first and second accumulator 430A and 430B one or more) and generator states (the for example alternator 420 current working currents that can provide) on the one hand.
For between power supply (being the first and second accumulator 430A and 430B and generator 420 here) and between power supply and power load rationally, distribute energy effectively, control module 410 need obtain the state parameter (for example electric current, voltage, temperature etc.) about power supply accurately and rapidly.
As shown in Figure 4, first, second and the 3rd Hall current sensor 440a, 440b, 440c are separately positioned near the transmission pressure of generator 420 and first, second accumulator 430a, 430b.In the present embodiment, these Hall current sensors and control module 410 all insert bus (for example CAN bus), thereby realize communication each other.
Each Hall current sensor can adopt as combining described structure of Fig. 1-3 and principle of work.Particularly, because the output current of generator 420 and the second accumulator 430b is bigger, so the iron core of the first and the 3rd Hall current sensor 440a, 440c is designed to circular, their first and second air gaps separately are set at the two ends of circle diameter.Perhaps the iron core with the first and the 3rd Hall current sensor 440a, 440c is designed to rectangular ring, and their first and second air gaps separately are arranged on the relative edge of straight-flanked ring.
On the other hand, because the output current of the first accumulator 430a is not very big, thus can the iron core of the second Hall current sensor 440b be designed to rectangular ring, and first and second air gaps are arranged on same one side of straight-flanked ring.
Fig. 5 is the block diagram according to the automobile power system of another embodiment of the utility model.
Be with difference embodiment illustrated in fig. 4; The generator 420 of present embodiment is an alternator; Therefore between alternator 420 and load 42, set up full-wave bridge 450, and the first Hall current sensor 440a is set at the transmission line of electricity part between full-wave bridge 450 and the load 42.
Because can be under the spirit that does not deviate from the utility model essential characteristic; Implement the utility model with various forms; Therefore this embodiment is illustrative rather than restrictive, because the scope of the utility model defines by accompanying claims, rather than is defined by instructions; Therefore fall into the border and the interior all changes of boundary of claim, or the equivalent of this claim border and boundary thereby forgiven by claim.
Claims (10)
1. a Hall current sensor is characterized in that, comprising:
Iron core is provided with first and second air gaps along its periphery;
First Hall element, it is arranged in said first air gap;
Second Hall element, it is arranged in the said interstice; And
Amplifying circuit, itself and said first and second Hall elements are coupled, and wherein, the input end with said amplifying circuit after said first and second Hall elements output terminal parallel coupled separately is coupled.
2. Hall current sensor as claimed in claim 1, wherein, said iron core is the shape of annulus.
3. Hall current sensor as claimed in claim 1, wherein, the shape of the rectangular ring of said iron core.
4. Hall current sensor as claimed in claim 2, wherein, said first and second air gaps are set at the two ends of the diameter of said annulus.
5. Hall current sensor as claimed in claim 3, wherein, said first and second air gaps are set at same one side of said straight-flanked ring.
6. an automobile power system is characterized in that, comprising:
Generator;
First accumulator, itself and said generator parallel coupled are to form current supply circuit;
Second accumulator, itself and starter parallel coupled start the loop to form; And
Control module, it is coupling between said current supply circuit and the said startup loop;
First, second and the 3rd Hall current sensor are separately positioned near the transmission pressure of said generator and first, second accumulator, and each said Hall current sensor comprises:
Be suitable for iron core that said transmission pressure is passed, first and second air gaps be set along its periphery;
First Hall element, it is arranged in said first air gap;
Second Hall element, it is arranged in the said interstice; And
Input end with said amplifying circuit after the amplifying circuit, said first and second Hall elements output terminal parallel coupled separately is coupled, the output terminal of said amplifying circuit and the coupling of said control module.
7. automobile power system as claimed in claim 6; Wherein, Further comprise the full-wave bridge that is arranged between said generator and the automobile load, said first Hall current sensor is arranged on the said transmission line of electricity part between said full-wave bridge and the load.
8. automobile power system as claimed in claim 6, wherein, said first and the iron core of the 3rd Hall current sensor be the shape of annulus, their first and second air gaps separately are set at the two ends of the diameter of said annulus.
9. automobile power system as claimed in claim 6, wherein, said first and the shape of the rectangular ring unshakable in one's determination of the 3rd Hall current sensor, their first and second air gaps separately are set at the relative edge of said straight-flanked ring.
10. automobile power system as claimed in claim 6, wherein, the shape of the rectangular ring unshakable in one's determination of said second Hall current sensor, said first and second air gaps are set at same one side of said straight-flanked ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203710381U CN202305632U (en) | 2011-09-30 | 2011-09-30 | A Hall current sensor having double Hall elements and automobile power system adopting the Hall current sensor having the double Hall elements |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203710381U CN202305632U (en) | 2011-09-30 | 2011-09-30 | A Hall current sensor having double Hall elements and automobile power system adopting the Hall current sensor having the double Hall elements |
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| CN202305632U true CN202305632U (en) | 2012-07-04 |
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| CN2011203710381U Expired - Fee Related CN202305632U (en) | 2011-09-30 | 2011-09-30 | A Hall current sensor having double Hall elements and automobile power system adopting the Hall current sensor having the double Hall elements |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103364612A (en) * | 2013-07-05 | 2013-10-23 | 华中科技大学 | Dual-Hall element current sensor |
| CN103675399A (en) * | 2012-09-17 | 2014-03-26 | 上海汽车集团股份有限公司 | Hall current measurement device with strong anti-jamming capability |
| CN104345199A (en) * | 2013-07-26 | 2015-02-11 | 上海汽车集团股份有限公司 | Method for correcting measuring current of storage battery and device thereof |
| CN105116214A (en) * | 2015-08-31 | 2015-12-02 | 重庆京东方光电科技有限公司 | Power detection device |
| CN108279328A (en) * | 2017-01-05 | 2018-07-13 | 南通杰夫电气有限公司 | Driver for electric vehicle and open loop Hall current sensor |
| CN110546519A (en) * | 2017-04-07 | 2019-12-06 | 西门子股份公司 | Current measuring method and current measuring device |
| CN113702683A (en) * | 2021-08-03 | 2021-11-26 | 广西电网有限责任公司南宁供电局 | Current measuring apparatus, method, computer device, and storage medium |
-
2011
- 2011-09-30 CN CN2011203710381U patent/CN202305632U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675399A (en) * | 2012-09-17 | 2014-03-26 | 上海汽车集团股份有限公司 | Hall current measurement device with strong anti-jamming capability |
| CN103364612A (en) * | 2013-07-05 | 2013-10-23 | 华中科技大学 | Dual-Hall element current sensor |
| CN104345199A (en) * | 2013-07-26 | 2015-02-11 | 上海汽车集团股份有限公司 | Method for correcting measuring current of storage battery and device thereof |
| CN104345199B (en) * | 2013-07-26 | 2017-11-03 | 上海汽车集团股份有限公司 | The method and apparatus for correcting measuring battery electric current |
| CN105116214A (en) * | 2015-08-31 | 2015-12-02 | 重庆京东方光电科技有限公司 | Power detection device |
| CN108279328A (en) * | 2017-01-05 | 2018-07-13 | 南通杰夫电气有限公司 | Driver for electric vehicle and open loop Hall current sensor |
| CN110546519A (en) * | 2017-04-07 | 2019-12-06 | 西门子股份公司 | Current measuring method and current measuring device |
| US11150272B2 (en) | 2017-04-07 | 2021-10-19 | Siemens Aktiengesellschaft | Method for measuring a current, and current-measuring device |
| CN110546519B (en) * | 2017-04-07 | 2022-07-15 | 西门子股份公司 | Current measuring method and current measuring device |
| CN113702683A (en) * | 2021-08-03 | 2021-11-26 | 广西电网有限责任公司南宁供电局 | Current measuring apparatus, method, computer device, and storage medium |
| CN113702683B (en) * | 2021-08-03 | 2023-10-27 | 广西电网有限责任公司南宁供电局 | Current measurement device, method, computer device, and storage medium |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20190930 |