CN103134973A - Current detection device - Google Patents
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- CN103134973A CN103134973A CN2012104882929A CN201210488292A CN103134973A CN 103134973 A CN103134973 A CN 103134973A CN 2012104882929 A CN2012104882929 A CN 2012104882929A CN 201210488292 A CN201210488292 A CN 201210488292A CN 103134973 A CN103134973 A CN 103134973A
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Abstract
The invention provides a current detection device provided with a substrate having a first plugging portion used for a conductor to plug; and a pair of magnetic detection elements arranged on the substrate in a manner that the magnetic detection elements clamp the first plugging portion. The magnetic detection elements are configured to clamp the conductor when the conductor is plugged into the first plugging portion. The magnetic detection elements are all provided with magnetic collection surfaces which are arranged to be orthogonal with a magnetic flow generated by current passing through the conductor.
Description
Technical field
The present invention relates to current sensing means that the electric current that flows through electric conductor is detected.
Background technology
In the past, known have a current sensing means that the electric current that flows through the line of electric force such as bus-bar (bus bar) is detected with contactless state.In this current sensing means, utilize the collection magnetic core of the ring-type that arranges in the mode of surrounding bus-bar, to corresponding with the electric current that flows through bus-bar and magnetic flux on every side that result from bus-bar collects magnetic.And, the magnetic flux that utilizes the magnetic detecting elements such as Hall element to come detected set magnetic to obtain, and the electric current that flows through bus-bar is detected.Yet, in this current sensing means, need to be used for arranging the configuration space of collection magnetic core, thereby cause the maximization of device.
Therefore, propose not adopt the collection magnetic core and direct magnetic flux is detected and the electric current that flows through bus-bar is detected, so-called current sensing means without core pattern.For example, with reference to No. 4385883 communique of Jap.P..In this current sensing means without core pattern, therefore can make equipment miniaturization owing to not needing to collect magnetic core.
Yet, in recent years, along with the miniaturization of the device (for example, transducer) of applicable above-mentioned current sensing means, the requirement with respect to the downsizing of the configuration space of current sensing means and bus-bar is also improved.Therefore, strongly expect the downsizing of the configuration space of current sensing means and bus-bar.
Summary of the invention
The current sensing means that the object of the present invention is to provide a kind of configuration space that can make current sensing means and bus-bar to reduce.
In order to reach above-mentioned purpose, according to a technical scheme of the present invention, current sensing means has: substrate, and it has the first insertion section that forms for the electric conductor insertion; And a pair of magnetic detecting element, its mode with described the first insertion section of clamping is arranged at described substrate, and described a pair of magnetic detecting element is set to the described electric conductor of clamping when described electric conductor is inserted into described the first insertion section.Described each magnetic detecting element has the collection magnetic surface, and this collection magnetic surface is set to and the magnetic flux quadrature that is produced by the electric current that flows through described electric conductor.
According to this structure, when electric conductor is inserted into the insertion section of substrate, the thickness of substrate that becomes the configuration space of magnetic detecting element also can be used as the configuration space of electric conductor and is utilized, therefore, compare with for example electric conductor being disposed on the substrate with insertion section, the configuration space of electric conductor is reduced.Its result when electric conductor is inserted into the insertion section, can make the configuration space of current sensing means and electric conductor reduce.
Preferably, described current sensing means possesses housing, this housing has the second insertion section that forms for described electric conductor insertion, take in described substrate with described the first insertion section and described the second opposed mode in insertion section in described housing, be inserted at described electric conductor under the state of described the first insertion section and described the second insertion section, described electric conductor is fixed in described housing.
According to this structure, at the fixing electric conductor of the housing of taking in magnetic detecting element, therefore can utilize housing and stably keep the relative position relationship of magnetic detecting element and electric conductor.Thus, can suppress to be offset by the position generation of the problems such as deterioration of the detection characteristic that causes, can detect the electric current that flows through electric conductor with stable accuracy of detection.
Preferably, be formed with for described electric conductor is carried out fastening installing component at described housing.
Therefore according to this structure, electric conductor can be anchored on housing, easily stationary housing and electric conductor.
Preferably, described current sensing means possesses described electric conductor, described electric conductor is inserted into described the first insertion section and described the second insertion section, and has through hole, utilizes break-through in described through hole and the screw that is screwed into described installing component, described electric conductor to be fixed in described housing.
In this structure, if be positioned at the through hole with electric conductor under the state of installing component of housing, electric conductor to be fixed in housing, housing and electric conductor are configured with predefined position relationship.Thus, can make each magnetic detecting element of being accommodated in housing and electric conductor position relationship, coincide well with the position relationship precision of expectation.Therefore, can utilize this magnetic detecting element and precision detects the current value that flows through electric conductor well.
Preferably, described the first insertion section forms open-ended with described substrate, and described the second insertion section forms open-ended with described housing.
According to this structure, be formed with openend at the substrate that is formed with the first insertion section and the second insertion section and the end of housing, therefore electric conductor can be inserted in the first insertion section and the second insertion section from this openend.Therefore, even such as afterwards, also can easily making this electric conductor be inserted into the first insertion section and the second insertion section in the shape (having the shape of a plurality of bends etc.) that electric conductor is formed complexity.Its result can improve the degree of freedom of the shape of electric conductor.
Preferably, the side in described housing and described substrate is formed with jut, and the opposing party in described housing and described substrate is formed with the recess chimeric with described jut.
According to this structure, make jut and recess chimeric, thus can be with substrate orientation in housing.Thus, can make a pair of magnetic detecting element that is arranged at substrate and the second insertion section position relationship, coincide well with the position relationship precision of expectation.And then, when electric conductor is inserted into the second insertion section, each magnetic detecting element can be disposed at well the position of expectation with respect to this electric conductor precision.
Description of drawings
Fig. 1 is the circuit block diagram of example that the current sensing means of one embodiment of the present invention is shown.
Fig. 2 is the exploded perspective view that current sensing means is shown.
Fig. 3 is the concise and to the point stereographic map that current sensing means is shown.
Fig. 4 is the concise and to the point stereographic map that the position relationship of magnetic detecting element and bus-bar is shown.
Fig. 5 is the concise and to the point cut-open view that current sensing means is shown.
Fig. 6 is the concise and to the point stereographic map that the current sensing means of variation is shown.
Embodiment
Below, with reference to Fig. 1 ~ Fig. 5, the related current sensing means of one embodiment of the present invention is described.As shown in Figure 1, the current sensing means 10 of present embodiment is applicable to drive unit 1, and this drive unit 1 utilizes three-phase alternating current (U phase, V phase, W phase) to drive three-phase motor MG.
The control device 3 that drive unit 1 has transducer 2 and this transducer 2 is controlled.Transducer 2 has 6 on-off element Q1 ~ Q6.For example adopt insulated gate bipolar transistor (insulated gatebipolar transistor:IGBT) or power MOSFET (metal oxide semiconductor field effect transistor) constant power semiconductor element as each on-off element Q1 ~ Q6.
The first on-off element Q1 and second switch element Q2 are connected in series.The 3rd on-off element Q3 and the 4th on-off element Q4 are connected in series.The 5th on-off element Q5 and described the 6th on-off element Q6 are connected in series.Be connected with diode D at each on-off element Q1 ~ Q6 reverse parallel connection.That is, be connected with the diode D that electric current flows from emitter towards collector between collector-emitter of each on-off element Q1 ~ Q6.
3 collectors of on-off element Q1, Q3, Q5 are connected with the positive terminal of direct supply 6 via distribution 4 respectively.3 emitters of on-off element Q2, Q4, Q6 are connected with the negative terminal of direct supply 6 via distribution 5 respectively.Tie point between on-off element Q1, Q2 is via bus-bar 7U(electric conductor) and be connected with the U phase coil of three-phase motor MG.Tie point between on-off element Q3, Q4 is via bus-bar 7V(electric conductor) and be connected with the V phase coil of three-phase motor MG.Tie point between on-off element Q5, Q6 is via bus-bar 7W(electric conductor) and be connected with the W phase coil of three-phase motor MG.
Be respectively arranged with current sensing means 10 at bus- bar 7U, 7V, 7W.Current sensing means 10 has magnetic detecting element 70(referring to Fig. 2).For example adopt Hall element, MR(magnetoresistance as this magnetic detecting element 70) element, MI(magnetic resistance) element.This current sensing means 10 does not possess the collection magnetic core, but utilize 70 pairs of magnetic detecting elements corresponding with the electric current that flows through bus- bar 7U, 7V, 7W and result from bus- bar 7U, 7V, 7W around magnetic flux carry out direct-detection, thereby the current value that flows through bus- bar 7U, 7V, 7W is detected.And current sensing means 10 outputs to control device 3 with testing result.
Control device 3 calculates the coil voltage of each phase of three-phase motor MG based on the torque instruction value of three-phase motor MG, from the current value of each current sensing means 10 inputs and the input voltage of transducer 2.And control device 3 generates the control signal of on-off element Q1 ~ Q6 on/off and this control signal is outputed to transducer 2 based on result of calculation.In addition, transducer 2 will be alternating voltage from the dc voltage conversion of direct supply 6 inputs based on control signal and this alternating voltage will be outputed to three-phase motor MG.
Next, the structure of current sensing means 10 described.Because the structure of the current sensing means 10 that is arranged at bus- bar 7U, 7V, 7W is roughly the same respectively, here, describe take the structure of the current sensing means 10 that is arranged at bus-bar 7U as representative.
As shown in Figures 2 and 3, current sensing means 10 has: the resinous housing 20 that is made of carriage 21 and lid 22; Be accommodated in the substrate 60 of the inside of housing 20; And a pair of magnetic detecting element 70 that is installed on substrate 60.
As shown in Figure 2, carriage 21 forms roughly rectangular-shaped.Particularly, carriage 21 has formed the under casing shape, and has: overlook and observe the tabular diapire 30 that is U word shape; And erect setting and overlook and observe the sidewall 40 that is U word shape from the edge of this diapire 30.Here, sidewall 40 has: along first and second side wall portion 41,42 of long side direction (Y-direction) extension; And the 3rd side wall portion 43 that is formed between this first and second side wall portion 41,42 and extends along short side direction (directions X).In addition, sidewall 40 has: the 4th side wall portion 44, itself and the 3rd side wall portion 43 is opposed and form abreast, and form continuously with the first side wall section 41; And the 5th side wall portion 45, itself and the 3rd side wall portion 43 is opposed and form abreast, and form continuously with the second side wall portion 42.Sidewall 40 also has to form to overlook between the 4th and the 5th side wall portion 44,45 observes the 6th ~ the 8th side wall portion 46 ~ 48 that is U word shape.
The 6th side wall portion 46 and the 4th side wall portion 44 form continuously, and with the 4th side wall portion 44 quadratures, and extend along Y-direction towards the inside of carriage 21.The 7th side wall portion 47 and the 6th side wall portion 46 form continuously, and with the 6th side wall portion 46 quadratures, and extend along directions X towards the second side wall portion 42.The 8th side wall portion 48 and the 7th side wall portion 47 form continuously, and with the 7th side wall portion 47 quadratures, and extend towards the 5th side wall portion 45.The 8th side wall portion 48 and the 5th side wall portion 45 form continuously.And, utilize the 6th ~ the 8th side wall portion 46 ~ 48 to divide and form the insertion section 21X that inserts for bus-bar 7U.In other words, at carriage 21, and with the part of the 3rd opposed sidewall 40 of side wall portion 43 in, be formed with the recess of quadrangular prism shape as insertion section 21X at the Width central portion.This insertion section 21X form with the 3rd opposed sidewall 40(of side wall portion 43 end) opening.That is, insertion section 21X forms the end that makes housing 21 towards the inboard depression of housing 21.
Be formed with respectively the pedestal 31 of supporting substrates 60 at four angles of diapire 30.Particularly, pedestal 31 be formed at respectively the bight that formed by the first side wall section 41 and the 3rd side wall portion 43, the bight that formed by the second side wall portion 42 and the 3rd side wall portion 43, by the first, the 4th and the 6th side wall portion 41,44,46 bights that form, by the second, the 5th and the 8th side wall portion 42,45,48 bights that form.Be formed with for the roughly columned locator protrusions section 32 that substrate 60 is positioned at each pedestal 31.In addition, be formed with through hole 33 at the diapire 30 near the 3rd side wall portion 43.
Be formed with respectively teat 49 for the roughly quadrangular prism shape that lid 22 is positioned at above-mentioned the first ~ the 5th side wall portion 41 ~ 45.
It is tabular that substrate 60 forms essentially rectangular.At substrate 60, be accommodated under the state of carriage 21 at this substrate 60, forming insertion section 60X with above-mentioned insertion section 21X opposed position in the mode that forms otch.That is, insertion section 60X forms in the mode that an end of substrate 60 is cut.Particularly, insertion section 60X forms following size: be accommodated at substrate 60 under the state of carriage 21, the 6th ~ the 8th side wall portion 46 ~ 48 that consists of insertion section 21X can be inserted into this insertion section 60X.This insertion section 60X forms along the thickness direction of substrate 60 and connects.In addition, be formed with pilot hole 61 near four angles of substrate 60, this pilot hole 61 is positioned at the 32 opposed positions with above-mentioned locator protrusions section when this substrate 60 is accommodated in carriage 21.
Be formed with not shown circuit on the surface of substrate 60.In addition, with the mode surface across above-mentioned insertion section 60X, a pair of magnetic detecting element 70 is installed on the surface of substrate 60.This a pair of magnetic detecting element 70 is configured to when substrate 60 is accommodated in carriage 21 and bus-bar 7U and is inserted into above-mentioned insertion section 60X, as shown in Figure 4, clips the face 8 that the direction that flows through along the electric current I of bus-bar 7U is extended.Particularly, each magnetic detecting element 70 has collection magnetic surface 71, and this collection magnetic surface 71 is configured to and is corresponding with the electric current I that flows through bus-bar 7U and result from the magnetic flux Φ quadrature on every side of bus-bar 7U.
As shown in Figure 2, be formed with splicing ear 62 at the back side of substrate 60, this splicing ear 62 connects for the wirning harness that above-mentioned control device 3 is electrically connected to substrate 60 (omitting diagram).Splicing ear 62 is electrically connected to the not shown circuit on the surface that is formed at substrate 60.This splicing ear 62 forms and is accommodated at substrate 60 that under the state of carriage 21, the through hole 33 from diapire 30 exposes.
It is tabular that lid 22 forms essentially rectangular.At lid 22, be assembled under the state of carriage 21 at this lid 22, forming insertion section 22X with above-mentioned insertion section 21X opposed position in the mode that forms otch.As shown in Figure 3, when lid 22 was assembled in carriage 21, insertion section 21X, 22X were communicated with on the Z direction, thereby above-mentioned insertion section 21X, 22X consist of the insertion section 20X of housing 20.Edge at the lid 22 corresponding with above-mentioned the first ~ the 5th side wall portion 41 ~ 45 is formed with respectively the recess 23 that engages with above-mentioned teat 49 when being assembled in carriage 21 in the mode that forms otch.
As shown in Figure 2, bus-bar 7U bends to stepped formation by the sheet metal (for example copper coin) that the cross section is rectangle.Particularly, bus-bar 7U has: the first connecting portion 7a, and it has connecting hole; The first conductive part 7b, itself and the first connecting portion 7a form continuously, and overlook to observe and be L word shape; And the second conductive part 7c, itself and the first conductive part 7b form continuously, and with this first conductive part 7b quadrature, and extend along the short transverse (Z direction) of the sidewall 40 of carriage 21.Bus-bar 7U has: the 3rd conductive part 7d, itself and the second conductive part 7c form continuously, and with this second conductive part 7c quadrature, and extend along directions X; And the second connecting portion 7e, itself and the 3rd conductive part 7d form continuously, and have connecting hole.Here, the second conductive part 7c is crooked vertically down from the end of the first conductive part 7b, and the 3rd conductive part 7d is flatly crooked towards the direction opposite with the end of above-mentioned the first conductive part 7b from the end of the second conductive part 7c.Like this, the first conductive part 7b, the second conductive part 7c and the 3rd conductive part 7d form stepped.And the part of the second conductive part 7c that extends along the short transverse of sidewall 40 is inserted into insertion section 21X, 22X, 60X.Particularly, the part of the second conductive part 7c is inserted into insertion section 21X, 22X, 60X, makes face that the direction that flows through along electric current I of the second conductive part 7c extends and the 6th and the 8th side wall portion 46,48 opposed.Thus, the face 8 that is inserted into the second conductive part 7c of insertion section 21X, 22X, 60X forms smooth face.
Be formed with through hole 7X at the 3rd conductive part 7d, this through hole 7X forms when bus-bar 7U is fixed in housing 20, is positioned at the opposed position of hollow bulb 51X with above-mentioned boss portion 51.In addition, the connecting portion of the side in the first connecting portion 7a and the second connecting portion 7e is connected with transducer 2, and the opposing party's connecting portion is connected with three-phase motor MG.
Next, the assembling mode of above-mentioned current sensing means 10 with bus-bar 7U described, and the effect of current sensing means 10 is described.
At first, as shown in Figure 2 so that be formed with the back side of substrate 60 of splicing ear 62 and carriage 21 opposed and make the opposed mode of insertion section 21X of insertion section 60X and the carriage 21 of substrate 60, substrate 60 is inserted into carriage 21.At this moment, make each locator protrusions section 32 of carriage 21 be fitted to the pilot hole 61 of the correspondence of substrate 60.Under this positioning states, utilize the not shown secure components such as screw that substrate 60 is fixed in carriage 21.Thus, substrate 60 is fixed (taking in) in carriage 21 with the state that is positioned, and therefore the surperficial a pair of magnetic detecting element 70 that is installed on this substrate 60 configures with predefined position relationship with respect to insertion section 21X.
Next, lid 22 is positioned and lid 22 is laminated to carriage 21.That is, make the insertion section 21X of the insertion section 22X of lid 22 and carriage 21 opposed, and make the teat 49 of carriage 21 be sticked in the recess 23 of lid 22, and lid 22 is laminated to carriage 21.Then, as shown in Figure 3, so that teat 49 is processed to the mode of the inside bend of lid 22, thereby lid 22 is fixed in carriage 21.Thus, formation has the insertion section 20X that insertion section 21X, 22X are connected to form and overlooks and observe the housing 20 that is U word shape.
Then, the second conductive part 7c of bus-bar 7U is inserted from the openend of the insertion section 20X of housing 20, and the second conductive part 7c is inserted in the 20X of insertion section.At this moment, the opposed mode of hollow bulb 51X with the boss portion 51 of the through hole 7X of the 3rd conductive part 7d and carriage 21 is positioned bus-bar 7U for housing 20.And, as shown in Figure 5, utilize the through hole 7X pass the 3rd conductive part 7d and with the screw 52 that the internal thread part of the boss portion 51 of housing 20 screws togather, bus-bar 7U is fixed in housing 20.Thus, bus-bar 7U is fixed in the housing 20 of taking in substrate 60 with the state that is positioned, and therefore the surperficial magnetic detecting element 70 that is installed on this substrate 60 configures with predefined position relationship with bus-bar 7U.
In addition, as mentioned above, when housing 20 was fixed with bus-bar 7U, the thickness of substrate 60 that becomes the configuration space of magnetic detecting element 70 also can be used in the configuration space of bus-bar 7U, therefore, can make the configuration space downsizing of bus-bar 7U.
As mentioned above, housing 20 and bus-bar 7U by state fastened to each other under, as shown in Figure 4, when electric current I flows through bus-bar 7U, corresponding to this electric current I bus-bar 7U(the second conductive part 7c) around produce magnetic flux Φ.At this moment, a pair of magnetic detecting element 70 is configured to the vertically collection magnetic surface 71 by each magnetic detecting element 70 of and the magnetic flux Φ that produce corresponding with electric current I.Therefore, along with the generation of above-mentioned magnetic flux Φ, the Voltage-output that a pair of magnetic detecting element 70 will be corresponding with magnetic field intensity is to the not shown circuit that is formed at substrate 60.This circuit detects the current value that flows through bus-bar 7U based on the detection signal (magnitude of voltage) from a pair of magnetic detecting element 70.Particularly, magnetic flux Φ is from the collection magnetic surface 71 of mutually different direction by a pair of magnetic detecting element 70.Therefore, about the detection signal from a pair of magnetic detecting element 70, for example the magnitude of voltage of the detection signal of a side magnetic detecting element 70 increases along with the increase of electric current I, and on the other hand, the magnitude of voltage of the detection signal of the opposing party's magnetic detecting element 70 reduces along with the increase of electric current I.And above-mentioned not shown circuit calculates the difference value of 2 detection signals with opposite characteristic, and based on this difference value, and the current value that flows through bus-bar 7U is detected.By utilizing this difference value, composition and the current value that flows through bus-bar 7U is detected can abate the noise.Therefore, can precision well the current value that flows through bus-bar 7U be detected.
And then bus-bar 7U is fixed in housing 20 with the state that is positioned, thereby a pair of magnetic detecting element 70 can be disposed at well with respect to bus-bar 7U precision the position of expectation.Therefore, can precision well the current value that flows through bus-bar 7U be detected.
According to present embodiment described above, can realize following effect.
(1) bus-bar 7U is inserted into the insertion section 60X that connects along the thickness direction of substrate 60, namely extend, and is provided with a pair of magnetic detecting element 70 in the mode of this bus-bar of clamping 7U.Thus, the thickness of substrate 60 that becomes the configuration space of magnetic detecting element 70 also can be used in the configuration space of bus-bar 7U, therefore, the configuration space of bus-bar 7U is reduced, thereby the configuration space of current sensing means 10 and bus-bar 7U integral body is reduced.And then, can will dispose drive unit 1 miniaturization of current sensing means 10 and bus-bar 7U.
(2) bus-bar 7U is directly fixed on the housing 20 of the magnetic detecting element 70 of taking in substrate 60 and being installed on this substrate 60.Thus, can utilize housing 20 and stably keep the relative position relationship of magnetic detecting element 70 and bus-bar 7U, therefore can suppress the deterioration of the current detecting characteristic that caused by the position skew etc.
For example, in the situation that utilize mutually different parts to fix current sensing means 10 and bus-bar 7U, because of the foozle of current sensing means 10 and bus-bar 7U, be used for the location tolerance of fixed current pick-up unit 10 and the parts of bus-bar 7U etc., cause magnetic detecting element 70 and the position relationship of bus-bar 7U to produce skew.Like this, there are the following problems: produce deviation from the magnitude of voltage of magnetic detecting element 70 outputs, thereby the accuracy of detection that flows through the electric current of bus-bar 7U worsens.
To this, in the present embodiment, bus-bar 7U is directly fixed on housing 20.Thus, reason such as the location tolerance that is used for fixed current pick-up unit 10 and the parts of bus-bar 7U respectively etc. is eliminated, therefore can suitably suppress magnetic detecting element 70 and produce the situation of skew with the position relationship of bus-bar 7U, the position relationship precision of this position relationship and expectation is coincide well.Therefore, can precision well the current value that flows through bus-bar 7U be detected.
(3) bus-bar 7U spiral is fixed in housing 20, therefore can easily bus-bar 7U be fixed in housing 20.In the situation that for example by housing 20 is carried out mold and bus-bar 7U is fixed in housing 20 with bus-bar 7U, if the comparatively complicated shape of mould of the shape of bus-bar 7U also becomes complicated.Like this, in the situation that bus-bar 7U spiral is fixed in housing 20, even the shape of bus-bar 7U is comparatively complicated, if for can be inserted into the shape of insertion section 20X, just the bus-bar 7U of the shape of complexity can be fixed in housing 20 simply.
(4) form insertion section 20X in the open-ended mode with housing 20, and form insertion section 60X in the open-ended mode with substrate 60.Thus, form openend in an end of housing 20 and substrate 60, therefore bus-bar 7U can be inserted in insertion section 20X, 60X from this openend.Therefore, even for example after bus-bar 7U being formed complicated shape, also can easily make this bus-bar 7U be inserted into insertion section 20X, 60X.
(5) be formed with locator protrusions section 32 at the carriage 21 of housing 20, be formed with pilot hole 61 at substrate 60.And, make each locator protrusions section 32 be fitted to corresponding pilot hole 61, thereby substrate 60 is positioned carriage 21.Thus, can make the surface be installed on a pair of magnetic detecting element 70 of substrate 60 and insertion section 20 position relationship, coincide well with the position relationship precision of expectation.And then, each magnetic detecting element 70 can be disposed at well the position of expectation with respect to the bus-bar 7U precision that is inserted into insertion section 20X.
(another embodiment)
In addition, the above-mentioned embodiment following mode that also can obtain so that it is suitably changed is implemented.
In the above-described embodiment, with the 3rd conductive part 7d of the mode bending of the second conductive part 7c quadrature of the insertion section 20X that is inserted into housing 20, fix with boss portion 51 spirals of housing 20.Be not limited to this, as shown in Figure 6, can omit diagram in Fig. 6 with respect to passing insertion section 20x() and be inserted into the part of the conductive part 7f of housing 20 inside, the face 9 that namely exposes from insertion section 20X carries out spiral to be fixed.In this case, for example the side 20A at housing 20 forms the extension 53 that has for the slot part 53X of above-mentioned conductive part 7f break-through, forms at this extension 53 boss portion 54 that screws in for screw 52.And utilization is fixed in housing 20 with the screw 52 that extension 53 and conductive part 7f connected and be screwed to boss portion 54 with bus-bar 7U.In addition, being not limited to the face that exposes from insertion section 20X by the fixing face of screw 52 spirals, can be also the face that is inserted in the 20X of insertion section.
In the above-described embodiment, be formed with at substrate 60 the insertion section 60X that connects along its thickness direction.Be not limited to this, if the shape that the part of bus-bar 7U can be inserted, insertion section 60X can form concavity.
In the above-described embodiment, insertion section 20X, 60X form otch.Be not limited to this, for example, can be provided with respectively insertion section 20X, 60X at the central portion of housing 20 and substrate 60.
In the above-described embodiment, fix by spiral and housing 20 is fastened to each other with bus-bar 7U.Be not limited to this, such as utilizing the securing member such as bolt and nut, that housing 20 is fastening mutually with bus-bar 7U.In addition, for example can be by housing 20 be carried out mold with bus-bar 7U, and housing 20 is fastened to each other with bus-bar 7U.
The cross sectional shape of bus-bar 7U in above-mentioned embodiment is rectangle, but is not limited to this, and for example the cross sectional shape of bus-bar 7U can be circle or triangle.
In the above-described embodiment, be formed with locator protrusions section 32 at housing 20, be formed with pilot hole 61 at substrate 60.Be not limited to this, for example, can form pilot holes at housing 20, form locator protrusions section at substrate 60.In addition, replace pilot hole 61 and can form the recess chimeric with locator protrusions section 32.
Can omit the housing 20 in above-mentioned embodiment.Even in this case, form insertion section 60X at substrate 60, in the mode across this insertion section 60X, a pair of magnetic detecting element 70 is arranged at substrate 60, when bus-bar 7U is inserted into insertion section 60X, if a pair of magnetic detecting element 70 is configured to across bus-bar 7U, can realize the effect identical with above-mentioned embodiment (1).
In the above-described embodiment, although current sensing means 10 is applicable to drive unit 1, the applicable position of current sensing means 10 is not limited thereto.
Claims (6)
1. current sensing means is characterized in that having:
Substrate, this substrate have the first insertion section that forms for the electric conductor insertion; And
A pair of magnetic detecting element, this a pair of magnetic detecting element is arranged at described substrate in the mode of described the first insertion section of clamping,
Described a pair of magnetic detecting element is set to the described electric conductor of clamping when described electric conductor is inserted into described the first insertion section, and described each magnetic detecting element has the collection magnetic surface, and this collection magnetic surface is set to and the magnetic flux quadrature that is produced by the electric current that flows through described electric conductor.
2. current sensing means according to claim 1, is characterized in that,
Described current sensing means possesses housing, and this housing has the second insertion section that forms for described electric conductor insertion,
Take in described substrate with described the first insertion section and described the second opposed mode in insertion section in described housing,
Be inserted at described electric conductor under the state of described the first insertion section and described the second insertion section, described electric conductor is fixed in described housing.
3. current sensing means according to claim 2, is characterized in that,
Be formed with for described electric conductor is carried out fastening installing component at described housing.
4. current sensing means according to claim 3, is characterized in that,
Described current sensing means possesses described electric conductor, and described electric conductor is inserted into described the first insertion section and described the second insertion section, and has through hole,
Utilize break-through in described through hole and the screw that is screwed into described installing component, described electric conductor to be fixed in described housing.
5. the described current sensing means of any one according to claim 2 ~ 4, is characterized in that,
Described the first insertion section forms open-ended with described substrate,
Described the second insertion section forms open-ended with described housing.
6. the described current sensing means of any one according to claim 2 ~ 4, is characterized in that,
A side in described housing and described substrate is formed with jut, and the opposing party in described housing and described substrate is formed with the recess chimeric with described jut.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-259592 | 2011-11-28 | ||
| JP2011259592A JP5731363B2 (en) | 2011-11-28 | 2011-11-28 | Current detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103134973A true CN103134973A (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104882929A Pending CN103134973A (en) | 2011-11-28 | 2012-11-26 | Current detection device |
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| JP (1) | JP5731363B2 (en) |
| CN (1) | CN103134973A (en) |
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| CN105980864A (en) * | 2014-02-03 | 2016-09-28 | 兴亚株式会社 | Resistor and current detector |
| CN106124831A (en) * | 2016-07-20 | 2016-11-16 | 昆山沃优自动化设备科技有限公司 | A kind of heating tube current detection device |
| CN107683417A (en) * | 2015-06-22 | 2018-02-09 | Koa株式会社 | Current sensing means and its manufacture method |
| CN107889527A (en) * | 2015-07-24 | 2018-04-06 | 泰连德国有限公司 | Equipment for measuring the electric current by busbar |
| CN109073686A (en) * | 2016-05-04 | 2018-12-21 | 赛峰电气与电源公司 | Bus current sensor module |
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| WO2023116280A1 (en) * | 2021-12-21 | 2023-06-29 | 江苏多维科技有限公司 | Stepped copper-bar current measurement apparatus |
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| JP6528613B2 (en) * | 2015-09-02 | 2019-06-12 | トヨタ自動車株式会社 | Motor device |
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| CN105980864A (en) * | 2014-02-03 | 2016-09-28 | 兴亚株式会社 | Resistor and current detector |
| CN105980864B (en) * | 2014-02-03 | 2019-07-23 | 兴亚株式会社 | Resistor and current detection means |
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| CN107683417B (en) * | 2015-06-22 | 2020-06-09 | Koa株式会社 | Current detection device and method for manufacturing same |
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| CN109073686B (en) * | 2016-05-04 | 2021-05-28 | 赛峰电气与电源公司 | Bus current sensor assembly |
| CN106124831A (en) * | 2016-07-20 | 2016-11-16 | 昆山沃优自动化设备科技有限公司 | A kind of heating tube current detection device |
| CN110709711A (en) * | 2017-06-14 | 2020-01-17 | 三菱电机株式会社 | Current detection device and power conversion device |
| WO2023116280A1 (en) * | 2021-12-21 | 2023-06-29 | 江苏多维科技有限公司 | Stepped copper-bar current measurement apparatus |
Also Published As
| Publication number | Publication date |
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| JP2013113687A (en) | 2013-06-10 |
| JP5731363B2 (en) | 2015-06-10 |
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