CN207426916U - Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and application apparatus - Google Patents
Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and application apparatus Download PDFInfo
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- CN207426916U CN207426916U CN201720318496.6U CN201720318496U CN207426916U CN 207426916 U CN207426916 U CN 207426916U CN 201720318496 U CN201720318496 U CN 201720318496U CN 207426916 U CN207426916 U CN 207426916U
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
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Abstract
The utility model discloses a kind of Magnetic Sensors, the Magnetic Sensor is in magnetic sensing elements two setting discharge line terminal opposite respectively, and two switches controlled respectively by two overlapping control signals are provided on discharge line, two switches on the discharge line can be in the overlapping period of two overlapping control signals, namely two overlapping control signals are when being all high level, it simultaneously turns on, it is so that short-circuit between two opposing terminals in magnetic sensing elements, realize repid discharge, eliminate the charge of parasitic capacitance storage, add the accuracy of magnetic sensing elements output signal.Magnetic Sensor integrated circuit, electric machine assembly and application apparatus including the Magnetic Sensor is also disclosed in the utility model.
Description
Technical field
The utility model is related to technical field of circuit control, more specifically, being to be related to a kind of Magnetic Sensor, Magnetic Sensor
Integrated circuit and the electric machine assembly and application apparatus using the Magnetic Sensor integrated circuit.
Background technology
The action principle of Magnetic Sensor is Hall effect, and Hall effect refers to electric current I passing to a substance, and with electric current
When applying magnetic field B into the direction of positive angle, caused by the right angle orientation in both electric current I and magnetic field B the phenomenon that potential difference V.
In practical application, Magnetic Sensor is frequently utilized for the polarity of the magnetic field of detection local environment.
Hall pole plate of the prior art include four connection terminals, when be oppositely arranged first, third terminal as electricity
Source input terminal, other two be oppositely arranged second, forth terminal be signal output part when, due to described first, third terminal
Between there are pressure difference, parasitic capacitance can be generated；Similarly, in second, forth terminal as power input, first, third terminal
For signal output part when, also can there are parasitic capacitances between Second terminal and forth terminal.The presence of parasitic capacitance, simultaneously because
Switching frequency between Hall pole plate difference terminal is very high, and causes parasitic capacitance that cannot discharge completely, can undoubtedly influence Hall
Pole plate exports the accuracy of signal.
Utility model content
In view of this, the utility model provides a kind of Magnetic Sensor, to overcome in the prior art since Hall pole plate exists
There are the charge of parasitic capacitance storage in the course of work, so as to influence the problem of Hall pole plate exports signal accuracy.
To achieve the above object, the utility model provides following technical solution：
A kind of Magnetic Sensor, including magnetic sensing elements, the magnetic sensing elements include four contact terminals, wherein, first,
Third terminal is oppositely arranged；Secondth, forth terminal is oppositely arranged；
Chopping switch, for modulating the magnetic field detection signal of the magnetic sensing elements output；
The first discharge line being connected between the first terminal and the third terminal；And it is connected to the second end
The second discharge line between sub and described forth terminal；When first, third terminal is power input, described second, the 4th end
Son is before magnetic signal output terminal, which turns on；When described first, third terminal be magnetic signal output terminal, it is described
Secondth, forth terminal is before power input, which turns on.
Optionally, which it is defeated to further include first be connected through the chopping switch with the described 3rd, forth terminal
Outlet, the second output terminal being connected through the chopping switch with first, second terminal；The chopping switch includes：
The first switch and second switch of first terminal and Second terminal are connected current sources to respectively, respectively by common port
Be connected to the 3rd switch and the 4th switch of third terminal and forth terminal, respectively by the first output terminal be connected to forth terminal and
The 5th switch and the 6th switch of third terminal and second output terminal is connected to the of Second terminal and first terminal respectively
Seven switches and the 8th switch.
Optionally, turned in the first terminal with power supply, when third terminal is turned on common port, the Second terminal with
The first output terminal conducting, the forth terminal are turned on the second output terminal；It is turned in the Second terminal with power supply,
When forth terminal is turned on ground, the first terminal is turned on first output terminal, the third terminal and described second defeated
Outlet turns on.
Optionally, the first switch and the second switch are respectively by first control signal and second control signal, institute
It is overlapping control signal to state first control signal and the second control signal；3rd switch and the described 4th switch are distinguished
It is controlled by the 4th control signal and the 3rd control signal, the 5th switch and the described 6th switch are respectively by the 4th control signal
It is controlled with the 3rd control signal, the 7th switch and the described 8th switch are respectively by the 3rd control signal and the 4th control signal
Control, the 3rd control signal and the 4th control signal are non-overlapping control signal.
Optionally, which includes the first discharge switch and the second discharge switch of series connection, and described first, the
Two discharge switches are controlled respectively by the first control signal and the second control signal；Second discharge line includes series connection
The 3rd discharge switch and the 4th discharge switch, the three, the 4th discharge switch is respectively by the first control signal and institute
State second control signal control.
Optionally, when first, third terminal be power input, described second, forth terminal be magnetic signal output terminal when,
And in the overlapping period of the first control signal and the second control signal, which simultaneously turns on.
Optionally, when first, third terminal be magnetic signal output terminal, described second, forth terminal be power input when,
And in the overlapping period of the first control signal and the second control signal, the three, the 4th discharge switches simultaneously turn on.
Optionally, the first control signal and the second control signal are high level during overlapping.
Optionally, the 3rd control signal with the second control signal on the contrary, the 4th control signal with it is described
First control signal is opposite.
Optionally, which is driven by constant-current source.
Optionally, which further includes the capacitance being connected between constant-current source and ground.
Optionally, which is mos capacitance.
Optionally, the switch of the chopping switch and first, second discharge line switchs for metal-oxide-semiconductor.
Optionally, and the first switch and second switch are switching pmos, and the 3rd switch is with the 4th switch
NMOS switch.
Optionally, the frequency of described two overlapping clock signals and described non-two overlapping clock signals is 100-600K Hz.
Correspondingly, the utility model also provides a kind of Magnetic Sensor integrated circuit including the Magnetic Sensor, the magnetic
Sensor IC further includes signal processor by magnetic field detection signal processing that the Magnetic Sensor exports and exports magnetic field
Detection information.
The utility model additionally provides the application apparatus for including the electric machine assembly.
Optionally, the application apparatus is pump, fan, household electrical appliance or vehicle.
It can be seen via above technical scheme that compared with prior art, the utility model embodiment discloses a kind of magnetic and passes
Sensor, the Magnetic Sensor in magnetic sensing elements two setting discharge line terminal opposite respectively, and on discharge line
It is provided with two controlled respectively by two overlapping control signals to switch, two switches on the discharge line can be in two friendships
When the overlapping period of folded control signal namely two overlapping control signals are all high level, simultaneously turn on, so that Hall pole
It is short-circuit between two opposing terminals in plate, it realizes repid discharge, eliminates the charge of parasitic capacitance storage, add magnetic sensing elements
Export the accuracy of signal.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiment of the utility model, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is the structure diagram of Magnetic Sensor disclosed in the utility model embodiment；
Fig. 2 is the sequence diagram of four control signals disclosed in the utility model embodiment；
Fig. 3 is the signal control schematic diagram of discharge switch disclosed in the utility model embodiment and chopping switch；
Fig. 4 is the structure diagram of another Magnetic Sensor disclosed in the utility model embodiment.
Fig. 5 is the general structure schematic diagram of Magnetic Sensor integrated circuit disclosed in the utility model embodiment.
Fig. 6 is a kind of electrical block diagram of electric machine assembly disclosed in the utility model embodiment.
Fig. 7 is the structure diagram of synchronous motor disclosed in the utility model embodiment.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
Fig. 1 is the structure diagram of Magnetic Sensor disclosed in the utility model embodiment, shown in Figure 1, and the magnetic passes
Sensor can include：
The circuit structure that dotted line frame is surrounded in magnetic sensing elements 10, i.e. Fig. 1, the magnetic sensing elements 10 include four contacts
Terminal, wherein, first terminal A and third terminal C are oppositely arranged；Second terminal B and forth terminal D are oppositely arranged.In this implementation
In example, which is Hall pole plate.The magnetic sensing elements 10 are driven by power supply 16.
The Magnetic Sensor further includes chopping switch 11, including eight switches of K1-K8 in Fig. 1, is connected to described four and connects
Between contravention, for modulating the magnetic field detection signal that the magnetic sensing elements 10 export.Specifically, the magnetic field detection signal
Including deviation signal and magnetic field signal, the deviation signal and magnetic field signal are modulated to baseband frequency by the chopping switch respectively
And chopping frequency.
In Fig. 1, K1-K8 collectively forms chopping switch 11, i.e., described chopping switch is by area between two square dotted line frames
Eight switch compositions of K1-K8 that domain includes.The Magnetic Sensor is further included is connected to the third terminal C through the chopping switch 11
With the first output terminal P of forth terminal D；With being connected to the of the first terminal A and Second terminal B through the chopping switch 11
Two output terminal N.Specifically, the chopping switch 11 can include：First terminal A and Second terminal are connected current sources to respectively
Common port (i.e. ground terminal, GND) is connected to third terminal C and forth terminal by the first switch K1 of B and second switch K2 respectively
The 3rd switch K3 of D and the 4th switch K4, is connected to the of the third terminal C and forth terminal D by the first output terminal P respectively
Six switch K6 and the 5th switch K5 and, second output terminal N is connected to the of the Second terminal B and first terminal A respectively
Seven switch K7 and the 8th switch K8.
Wherein, the first switch K1 and second switch K2 is believed respectively by the controls of first control signal CK2B and second
Number CK1B control, wherein, the first control signal and the second control signal are overlapping control signal；3rd switch
K3 and the 4th switch K4 are controlled respectively by the 4th control signal CK2 and the 3rd control signal CK1, the 5th switch K5 and
The 6th switch K6 is controlled respectively by the 4th control signal CK2 and the 3rd control signal CK1, the 7th switch K7 and described
8th switch K8 is controlled respectively by the 3rd control signal CK2 and the 4th control signal CK1, the 3rd control signal CK1 and institute
The 4th control signal CK2 is stated as non-overlapping control signal.The first control signal CK1B and the 3rd control signal CK1 is phase
Opposite clock signal；The second control signal CK2B and the 4th control signal CK2 is the clock signal of opposite in phase.
In the present embodiment, the overlap signal refers to the signal for having part current potential overlapping, i.e. partial period is simultaneously high potential or low
Current potential；The disjoint signals refers to the signal of no same potential.It is turned in the first terminal A with power supply, third terminal C is with connecing
When ground terminal (common port) turns on, the Second terminal B is turned on the first output terminal P, the forth terminal D and described second
Output terminal N is turned on；Turned in the Second terminal B with power supply, forth terminal D with ground turn on when, the first terminal A with it is described
First output terminal P is turned on, and the third terminal C is turned on the second output terminal N.
In addition to above-mentioned magnetic sensing elements 10 and chopping switch 11, the Magnetic Sensor, which further includes, is connected to the first end
The first discharge line 12 between sub- A and the third terminal C, i.e. circuit between first terminal A and third terminal C, Yi Jilian
The second discharge line 13 being connected between the Second terminal B and the forth terminal D, i.e. between Second terminal B and forth terminal D
Circuit；When the first terminal A and third terminal C are that power input, the Second terminal B and forth terminal D are magnetic letter
Before number output terminal, which turns on；When the first terminal A and third terminal C be magnetic signal output terminal, it is described
Second terminal B and forth terminal D is before power input, first discharge line 12 turns on.
In a possible realization method, first discharge line 121 can include the first discharge switch of series connection
S1 and the second discharge switch S2, first, second discharge switch is respectively by the first control signal CK2B and described second
Control signal CK1B is controlled；Second discharge line 13 includes the 3rd discharge switch S3 and the 4th discharge switch S4 of series connection, institute
The three, the 4th discharge switches are stated to be controlled by the first control signal CK2B and second control signal CK1B respectively.
When the first terminal A and third terminal C is power input, the Second terminal B and the 4th end
Before sub- D is magnetic signal output terminal, and in the overlapping period of the first control signal CK2B and the second control signal CK1B,
The 3rd discharge switch S3 and the 4th discharge switch S4 are simultaneously turned on；As the first terminal A and the third terminal C
For magnetic signal output terminal, the Second terminal B and the forth terminal D is before power inputs, and in the described first control letter
The overlapping period of number CK2B and second control signal CK1B, the first discharge switch S1 and the second discharge switch S2
It simultaneously turns on.
Fig. 2 is the sequence diagram of four control signals (CK1, CK2, CK1B, CK2B) disclosed in the utility model embodiment, such as
Shown in Fig. 2, four control signals include two non-overlapping control signals, i.e., the control letters of described 3rd control signal CK1 and the 4th
Number CK2 and two overlapping control signal, i.e. second control signal CK1B and first control signal CK2B.Wherein, CK1 with
CK1B is on the contrary, CK2 is opposite with CK2B.The overlapping control signal CK1B and CK2B is during overlapping, i.e. between two dotted lines
Period is high level.The non-overlapping control signal CK1 of above-mentioned two and CK2 and two overlapping control signal CK1B and
CK2B is clock signal, and frequency can be 100K-600KHz, including endpoint value, wherein preferably 400KHz.
Fig. 3 is the signal control schematic diagram of discharge switch disclosed in the utility model embodiment and chopping switch, with reference to figure
3, when clock signal CK1 is high level, CK2B is high level, and CK2 and CK1B are low level, at this time the Second terminal B and
The forth terminal D is power input to be respectively turned on current source and common port (ground terminal GND), and the third terminal C
With the switch conduction between the first output terminal P, the switch conduction between the first terminal A and the second output terminal N,
Then the first terminal A and third terminal C is magnetic signal output terminal.Just become in the clock signal CK1 from high level
In a bit of time after low level, i.e. the period in Fig. 2 between first group of two dotted line is two overlapping control signals
The overlapping phase of CK1B and CK2B, CK1B and CK2B is high level during this, the Second terminal B and the forth terminal D it
Between the 3rd discharge switch S3 and the 4th discharge switch S4 be both turned on, between the Second terminal B and the forth terminal D
Short circuit eliminates the charge of the parasitic capacitance storage between Second terminal B and forth terminal D.Hereafter, it is in clock signal CK1
During low level, CK2B is low level, and CK2 and CK1B are high level, and the first terminal A and third terminal C is point at this time
Other turn-on current source and common port (ground terminal GND) are power input, and the Second terminal B and the first output terminal P
Between switch conduction, the switch conduction between the forth terminal D and the second output terminal N, then the Second terminal B and
The forth terminal D is magnetic signal output terminal.The clock signal CK1 just from low level become high level before it is a bit of when
In, i.e. the period in Fig. 2 between second group of two dotted line, the overlapping phase for being two overlapping control signal CK1B and CK2B,
CK1B and CK2B is high level during this, first discharge switch between the first terminal A and the third terminal C
S1 and the second discharge switch S2 are both turned on, short-circuit between the first terminal A and the third terminal C, eliminate first terminal A
The charge of parasitic capacitance storage between third terminal C.
Fig. 2, Fig. 3 can be combined and the above-mentioned description as described in four control signals understands the present embodiment related content.
In the present embodiment, four electric discharges that include eight switches of the chopping switch 11 and discharge line include are opened
Closing can be that metal-oxide-semiconductor switchs.And the first switch K1 and second switch K2 are switching pmos, the 3rd switch K3 and the
Four switch K4 are NMOS switch.
In the present embodiment, the Magnetic Sensor in magnetic sensing elements two setting discharge line terminal opposite respectively,
And two switches controlled respectively by two overlapping control signals are provided on discharge line, two on the discharge line open
It closes and can be simultaneously turned on when the overlapping period of two overlapping control signals namely two overlapping control signals are all high level,
So that it is short-circuit between two opposing terminals in magnetic sensing elements, it realizes repid discharge, eliminates parasitic capacitance, add magnetic strength
Survey the accuracy of the magnetic signal of element output.
On the basis of above-mentioned the utility model disclosed embodiment, Fig. 4 shows the circuit knot of another Magnetic Sensor
Structure schematic diagram, as shown in figure 4, except magnetic sensing elements 10, chopping switch 11,12 and of the first discharge line in above-described embodiment
Outside second discharge line 13, the Magnetic Sensor further includes the capacitance being connected between power supply 12 and ground terminal GND (common port)
14。
Wherein, the power supply can be constant pressure source, or constant-current source, in the present embodiment, the power supply are constant current
Source.When the current source is constant-current source, the magnetic sensing elements 10 are driven by constant-current source.It is driven using constant-current source, Ke Yibao
The sensitivity of card magnetic sensing elements will not be affected by temperature.
In the present embodiment, the capacitance 14 is capable of providing burning voltage, can be in the input/defeated of the magnetic sensing elements 10
When outlet switches, by the faster pull-up of the voltage of power supply terminal, to ensure the superperformance of magnetic sensing elements.
The capacitance of the capacitance 14 can in tens pico farads or so, more than the magnetic sensing elements 10 contact terminal it
Between parasitic capacitance capacitance.
The capacitance 14 can be but be not limited to mos capacitance.When the capacitance 14 is mos capacitance, it is ensured that its
Capacitance is not affected by temperature.
Attached drawing 5 is referred to, Fig. 5 is the overall structure of Magnetic Sensor integrated circuit 4000 disclosed in the utility model embodiment
Schematic diagram.The Magnetic Sensor integrated circuit 4000 is connected with AC power and is output control signals to according to external magnetic field polarity
Two-way controllable AC switch.The Magnetic Sensor integrated circuit 4000 includes AC-DC converter, current source generator, magnetic strength and surveys
Module and clock module.The AC-DC converter is used to alternating voltage being converted to DC voltage and for the magnetic sensing module
It powers with clock module.The current source generator exports multiple electric currents according to the low-voltage dc voltage.The magnetic strength surveys mould
Block changes and for detecting external magnetic field according to changes of magnetic field output magnetic field detection information.The clock module is the sensing mould
Block provides clock signal.The magnetic sensing module includes Magnetic Sensor shown in FIG. 1 and the magnetic field for exporting the Magnetic Sensor
Detection signal processing simultaneously exports the signal processor of magnetic field detection information.
As shown in fig. 6, the embodiment of the present application additionally provides a kind of electric machine assembly, the electric machine assembly includes：By an exchange
The motor 2000 that power supply 1000 is powered；The bidirectional conduction switch 3000 connected with the motor 2000；And according in the application
State the Magnetic Sensor integrated circuit 4000 that any embodiment is provided, the output port of the Magnetic Sensor integrated circuit 4000 with
The control terminal electrical connection of the bidirectional conduction switch 3000.Preferably, the electric machine assembly further includes reduction voltage circuit 5000, is used for
The Magnetic Sensor integrated circuit 4000 is supplied to after the AC power 1000 is depressured.Magnetic Sensor integrated circuit 4000 leans on
The rotor of nearly motor 2000 is installed to perceive the changes of magnetic field of rotor.Preferably, bidirectional conduction switch 3000 can be that three ends are double
To reverse-blocking tetrode thyristor (TRIAC).It is appreciated that bidirectional conduction switch can also be realized by other kinds of suitable switch, such as
It can include two thyristors of reverse parallel connection, and corresponding control circuit is set, according to Magnetic Sensor integrated circuit
The output signal of output port controls the two thyristors through the control circuit according to predetermined way.
Preferably, the electric machine assembly further includes reduction voltage circuit 5000, for carrying after the AC power 1000 is depressured
Supply the Magnetic Sensor integrated circuit 4000.Magnetic Sensor integrated circuit 4000 is installed to perceive close to the rotor of motor 2000
The changes of magnetic field of rotor.
On the basis of above-described embodiment, in the specific embodiment of the application, the motor is synchronous motor, can
To understand, the Magnetic Sensor integrated circuit of the utility model is applicable not only to synchronous motor, is also applied for other kinds of permanent magnetism
Motor such as DC brushless motor.As shown in fig. 7, the synchronous motor include stator and can relative stator rotation rotor 1001.
Stator has stator core 1002 and the stator winding 1006 being set around in stator core 1002.Stator core 1002 can be by pure
The soft magnetic materials such as iron, cast iron, cast steel, electrical sheet, silicon steel are made.Rotor 1001 has permanent magnet, and stator winding 1006 is with exchanging
Rotor 1001 encloses in steady-state process/rotating speed the constant-speed operation of minute with 60f/p when power supply is connected, and wherein f is the AC power
Frequency, p is the number of pole-pairs of rotor.In the present embodiment, stator core 1002 has two opposite pole portions 1004.Each pole portion tool
There is polar arc face 1005, the outer surface of rotor 1001 is opposite with polar arc face 1005, forms substantially uniform air gap between the two.The application
Alleged substantially homogeneous air gap refers to largely form even air gap between stator and rotor, and only fewer parts is non-homogeneous
Air gap.Preferably, the starting slot 1007 of indent is set on the polar arc face 1005 in stator poles portion, is removed on polar arc face 1005 and starts slot 1007
Part in addition is then concentric with rotor.Above-mentioned configuration can form non-uniform magnetic field, ensure that rotor its pole axis S1 when static is opposite
Central shaft S2 in stator poles portion tilts an angle, and allowing motor, rotor can be with when being powered every time under the action of integrated circuit
With starting torque.The pole axis S1 of wherein rotor refers to the line of demarcation between the different magnetic pole of two polarity of rotor, stator poles portion
1004 central shaft S2 refers to the line by two pole of stator portion, 1004 center.In the present embodiment, stator and rotor are respectively provided with two
A magnetic pole.It should be understood that in more embodiments, the number of magnetic poles of stator and rotor can not also be equal, and with more magnetic
Pole, such as four, six etc..
Correspondingly, the embodiment of the present application additionally provides a kind of application apparatus, including the motor powered by an AC power；With
The bidirectional conduction switch of the motor series connection；And the Magnetic Sensor integrated circuit that above-mentioned any one embodiment provides, the magnetic
The output port of sensor IC is electrically connected with the control terminal that the bidirectional conduction switchs.Optionally, the application apparatus
Can be in the application apparatus such as pump, fan, household electrical appliance, vehicle, the household electrical appliance for example can be washing machine, dish-washing machine,
Smoke exhaust ventilator, exhaust fan etc..
In the present embodiment, the Magnetic Sensor in magnetic sensing elements two setting discharge line terminal opposite respectively,
And two switches controlled respectively by two overlapping control signals are provided on discharge line, two on the discharge line open
It closes and can be simultaneously turned on when the overlapping period of two overlapping control signals namely two overlapping control signals are all high level,
So that it is short-circuit between two opposing terminals in magnetic sensing elements, it realizes repid discharge, eliminates the charge of parasitic capacitance storage,
Add the accuracy of magnetic sensing elements output signal.Moreover, Magnetic Sensor described in the present embodiment further includes and is connected to current source
Capacitance between ground, the capacitance can be when the input/output terminal of the magnetic sensing elements switch, by the voltage of power supply terminal
Faster pull-up ensures the superperformance of magnetic sensing elements, and then ensures the superperformance of Magnetic Sensor.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, term " comprising ", "comprising" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed or further include as this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
Also there are other identical elements in process, method, article or equipment including the element.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications of these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (18)
1. a kind of Magnetic Sensor, which is characterized in that including magnetic sensing elements, the magnetic sensing elements include four contact terminals,
Wherein, first, third terminal is oppositely arranged；Secondth, forth terminal is oppositely arranged；
Chopping switch, for modulating the magnetic field detection signal of the magnetic sensing elements output；
The first discharge line being connected between the first terminal and the third terminal；And be connected to the Second terminal and
The second discharge line between the forth terminal；When first, third terminal be power input, described second, forth terminal be
Before magnetic signal output terminal, second discharge line conducting；When described first, third terminal be magnetic signal output terminal, described second,
Forth terminal is first discharge line conducting before power input.
2. Magnetic Sensor according to claim 1, which is characterized in that the Magnetic Sensor further include through the chopping switch with
Described 3rd, the first output terminal of forth terminal connection, second be connected through the chopping switch with first, second terminal
Output terminal；The chopping switch includes：
The first switch and second switch of first terminal and Second terminal are connected current sources to respectively, respectively connect common port
To the 3rd switch and the 4th switch of third terminal and forth terminal, the first output terminal is connected to forth terminal and the 3rd respectively
The 7th that 5th switch of terminal switchs with the 6th and second output terminal is connected to Second terminal and first terminal respectively opens
It closes and the 8th switchs.
3. Magnetic Sensor according to claim 2, which is characterized in that turned in the first terminal with power supply, the 3rd end
When son is turned on common port, the Second terminal is turned on first output terminal, the forth terminal and the described second output
End conducting；It is turned in the Second terminal with power supply, when forth terminal is turned on ground, the first terminal and the described first output
End conducting, the third terminal are turned on the second output terminal.
4. Magnetic Sensor according to claim 2, which is characterized in that the first switch and the second switch respectively by
First control signal and second control signal control, the first control signal and the second control signal are believed for overlapping control
Number；3rd switch and the described 4th switch are controlled respectively by the 4th control signal and the 3rd control signal, and the described 5th opens
It closes and the described 6th switch is controlled respectively by the 4th control signal and the 3rd control signal, the 7th switch and the described 8th is opened
It closes and is controlled respectively by the 3rd control signal and the 4th control signal, the 3rd control signal and the 4th control signal are non-
Overlapping control signal.
5. Magnetic Sensor according to claim 4, which is characterized in that first discharge line includes the first electric discharge of series connection
Switch and the second discharge switch, first, second discharge switch is respectively by the first control signal and second control
Signal controls；Second discharge line includes the 3rd discharge switch and the 4th discharge switch of series connection, the three, the 4th electric discharge
Switch is controlled respectively by the first control signal and the second control signal.
6. Magnetic Sensor according to claim 5, which is characterized in that when first, third terminal be power input, it is described
Secondth, forth terminal is before magnetic signal output terminal, and in the overlapping phase of the first control signal and the second control signal
Between, the three, the 4th discharge switches simultaneously turn on.
7. Magnetic Sensor according to claim 5, which is characterized in that when first, third terminal be magnetic signal output terminal, institute
Second, forth terminal is stated as before power input, and in the overlapping phase of the first control signal and the second control signal
Between, which simultaneously turns on.
8. the Magnetic Sensor according to claim 6 or 7, which is characterized in that the first control signal and second control
Signal processed is high level during overlapping.
9. Magnetic Sensor according to claim 5, which is characterized in that the first control signal is believed with the described 3rd control
Number on the contrary, the second control signal is opposite with the 4th control signal.
10. Magnetic Sensor according to claim 1, which is characterized in that the magnetic sensing elements are driven by constant-current source.
11. Magnetic Sensor according to claim 10, which is characterized in that the Magnetic Sensor further include be connected to constant-current source with
Capacitance between ground.
12. Magnetic Sensor according to claim 11, which is characterized in that the capacitance is mos capacitance.
13. Magnetic Sensor according to claim 5, which is characterized in that the chopping switch and first, second discharge line
It switchs and is switched for metal-oxide-semiconductor.
14. Magnetic Sensor according to claim 5, which is characterized in that and the first switch and second switch are PMOS
Pipe switchs, and the 3rd switch and the 4th switch are NMOS switch.
15. Magnetic Sensor according to claim 5, which is characterized in that the first control signal and the described second control
Signal is overlapping control signal, and the 3rd control signal is non-overlapping control signal with the 4th control signal；The friendship
The frequency of folded clock signal and the non-overlapping clock signal is 100-600K Hz.
16. a kind of Magnetic Sensor integrated circuit, which is characterized in that including the magnetic sensing as described in claim 1-15 any one
Device and signal processor are by magnetic field detection signal processing that the Magnetic Sensor exports and export magnetic field detection information.
17. a kind of application apparatus, which is characterized in that there is Magnetic Sensor integrated circuit as claimed in claim 16.
18. application apparatus according to claim 17, which is characterized in that the application apparatus is pump, fan, household electrical appliance
Or vehicle.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610203285 | 2016-04-01 | ||
| CN2016102032858 | 2016-04-01 | ||
| CN201610248168 | 2016-04-20 | ||
| CN2016102481683 | 2016-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207426916U true CN207426916U (en) | 2018-05-29 |
Family
ID=60095766
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610389973.8A Expired - Fee Related CN107294310B (en) | 2016-04-01 | 2016-06-03 | Magnetic sensor, magnetic sensor integrated circuit, motor assembly and application device |
| CN201720318496.6U Expired - Fee Related CN207426916U (en) | 2016-04-01 | 2017-03-29 | Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and application apparatus |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610389973.8A Expired - Fee Related CN107294310B (en) | 2016-04-01 | 2016-06-03 | Magnetic sensor, magnetic sensor integrated circuit, motor assembly and application device |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN107294310B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0671104B2 (en) * | 1987-08-31 | 1994-09-07 | 株式会社東芝 | Magnetoelectric conversion element and magnetoelectric conversion device |
| JP4675994B2 (en) * | 2008-08-27 | 2011-04-27 | 株式会社東芝 | Magnetic sensor and magnetic measurement method |
| TWI439046B (en) * | 2011-08-12 | 2014-05-21 | Richtek Technology Corp | Auto-zero amplifier and sensor module using same |
| KR20130026218A (en) * | 2011-09-05 | 2013-03-13 | 삼성전기주식회사 | Hall plate switching system |
| JP5865108B2 (en) * | 2012-02-16 | 2016-02-17 | セイコーインスツル株式会社 | Magnetic sensor device |
| JP6072482B2 (en) * | 2012-09-24 | 2017-02-01 | エスアイアイ・セミコンダクタ株式会社 | Semiconductor Hall sensor |
-
2016
- 2016-06-03 CN CN201610389973.8A patent/CN107294310B/en not_active Expired - Fee Related
-
2017
- 2017-03-29 CN CN201720318496.6U patent/CN207426916U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN107294310A (en) | 2017-10-24 |
| CN107294310B (en) | 2020-04-03 |
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Granted publication date: 20180529 |