CN207301299U - A kind of Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and application apparatus - Google Patents

A kind of Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and application apparatus Download PDF

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Publication number
CN207301299U
CN207301299U CN201720457702.1U CN201720457702U CN207301299U CN 207301299 U CN207301299 U CN 207301299U CN 201720457702 U CN201720457702 U CN 201720457702U CN 207301299 U CN207301299 U CN 207301299U
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CN
China
Prior art keywords
switch
clock signal
magnetic
signal
sub
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CN201720457702.1U
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Chinese (zh)
Inventor
蔡光杰
王俊辉
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德昌电机(深圳)有限公司
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Priority to CN201610281787 priority Critical
Priority to CN2016102817872 priority
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Publication of CN207301299U publication Critical patent/CN207301299U/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/02Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices, e.g. Hall effect devices; using magneto-resistive devices
    • G01R33/07Hall effect devices

Abstract

The utility model discloses a kind of Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and application apparatus, including rectification circuit, magnetic field detection circuit and time schedule controller;Rectification circuit is used to external power supply being converted to DC power supply, to power for magnetic field detection circuit;Magnetic field detection circuit is used to export magnetic field detection signal according to the change of external magnetic field, and magnetic field detection circuit includes sequentially connected magnetic measuring sensor, the first chopping switch, switch-capacitor filtering module and modular converter;Time schedule controller exports the first clock signal to the first chopping switch and the first amplification module, output second clock signal to switch-capacitor filtering module;And second clock signal is than first first scheduled time of clock signal delay.By being extended to the function of existing Magnetic Sensor, integrated circuit cost is reduced, improves reliability.

Description

A kind of Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and application apparatus

Technical field

Magnetic field detection technology field is the utility model is related to, more specifically, is related to a kind of Magnetic Sensor, Magnetic Sensor Integrated circuit, electric machine assembly and application apparatus.

Background technology

Magnetic Sensor is widely used in modern industry and electronic product measures electric current, position, side with induced field intensity To etc. physical parameter.It is an important applied field of Magnetic Sensor in electromechanics trade, in the motor, Magnetic Sensor can be used Make rotor magnetic pole position sensing.

In the prior art, Magnetic Sensor is typically only capable to output field detection result, and whens specific works also needs to additionally set Peripheral circuit, handles the field detection result, therefore integrated circuit cost is higher, and reliability is poor.

Utility model content

In view of this, the utility model provides a kind of Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and family expenses Electric appliance, by being extended to the function of existing Magnetic Sensor, can reduce integrated circuit cost, improve reliability.

To achieve the above object, the technical scheme that the utility model is provided is as follows:

A kind of Magnetic Sensor, including rectification circuit, magnetic field detection circuit and time schedule controller;

The rectification circuit is used to external power supply being converted to DC power supply, powers for the magnetic field detection circuit;

The magnetic field detection circuit is used to export magnetic field detection signal according to the change of external magnetic field, wherein, the magnetic field Detection circuit includes magnetic measuring sensor, the first chopping switch, the first amplification module and switch-capacitor filtering module;

The time schedule controller exports the first clock signal to first chopping switch and the first amplification module, exports the Two clock signals are to the switch-capacitor filtering module;Wherein, the second clock signal is than first clock signal delay First scheduled time.

Optionally, the Magnetic Sensor further includes modular converter, and the time schedule controller exports the 3rd clock signal to institute State module modular converter, and the second clock signal is than second scheduled time of the 3rd clock signal delay, and described One scheduled time was more than second scheduled time.

Optionally, first scheduled time is 1/4 cycle of first clock signal.

Optionally, second scheduled time was 5 nanoseconds.

Optionally, the frequency of first clock signal, second clock signal and the 3rd clock signal is identical.

Optionally, first clock signal includes at least two non-overlapping sub-clock signals.

Optionally, the second clock signal includes at least two non-overlapping sub-clock signals.

Optionally, the frequency of first clock signal, second clock signal and the 3rd clock signal is 100K-600K Hertz, including endpoint value.

Optionally, the magnetic measuring sensor includes the first terminal that is oppositely arranged and third terminal, and the be oppositely arranged Two-terminal and forth terminal;

First chopping switch includes the first power supply being respectively connected between the first terminal and Second terminal First switch and second switch, the 3rd switch and the ground terminal being respectively connected between the third terminal and forth terminal Four switches, the 5th switch and the 6th being connected to the first output terminal between the Second terminal and third terminal respectively switch, And the 7th switch and the 8th that the second output terminal is connected between the forth terminal and the first terminal respectively switchs;

Wherein, first clock signal includes the first sub-clock signal, the second sub-clock signal, the 3rd sub-clock signal With the 4th sub-clock signal, the first switch and second switch are believed by first sub-clock signal and the second sub-clock respectively Number control, the 3rd switch and the 4th switch are controlled by the 4th sub-clock signal and the 3rd sub-clock signal respectively, and described the Five switches and the 6th switch are controlled by the 4th sub-clock signal and the 3rd sub-clock signal respectively, the 7th switch and the Eight switches are controlled by the 3rd sub-clock signal and the 4th sub-clock signal respectively;

First sub-clock signal and the 4th sub-clock signal are on the contrary, second sub-clock signal and the 3rd sub-clock Signal is on the contrary, and the 3rd sub-clock signal and the 4th sub-clock signal are disjoint signals.

Optionally, the switch-capacitor filtering module includes:First switch capacitive filter, second switch capacitor filtering Device, the 3rd switch capacitor filter, the 4th switch capacitor filter, and each switch capacitor filter includes at least two switches, At least two switch is controlled by non-overlapping clock signal.

Optionally, first amplification module includes sequentially connected first amplifier, the second chopping switch and second is put Big device;

First amplifier and the second amplifier are used to carry out gain amplification to the signal of input, and second copped wave is opened Close actually detected in the differential signal for being used for exporting first chopping switch under the control of first clock signal Signal solution is transferred to low frequency region.

Optionally, the modular converter includes sequentially connected comparator and latch, the latch and the sequential Controller is connected, and the latch receives the 3rd clock signal.

Correspondingly, the embodiment of the present application additionally provides a kind of Magnetic Sensor integrated circuit, including above-mentioned Magnetic Sensor, also Including output port and the output control circuit being connected between the output port and magnetic field detection circuit;

The output control circuit is used at least be based on the magnetic field detection signal, makes the Magnetic Sensor integrated circuit extremely It is few from the output port to the first state of exterior outflow electric current and from it is exterior to the output port inflow current the Run under the one of state of two-state.

Correspondingly, the embodiment of the present application additionally provides a kind of electric machine assembly, including the motor powered by an AC power;With And above-mentioned Magnetic Sensor integrated circuit.

Correspondingly, 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.

Compared to the prior art, technical solution provided by the utility model at least has the following advantages:

The utility model provides a kind of Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and household electrical appliance, including Rectification circuit, magnetic field detection circuit and time schedule controller;The rectification circuit is used to external power supply being converted to DC power supply, with Power for the magnetic field detection circuit;The magnetic field detection circuit is used to export magnetic field detection letter according to the change of external magnetic field Number, wherein, the magnetic field detection circuit includes sequentially connected magnetic measuring sensor, the first chopping switch, the first amplification module, switch Capacitor filtering module, the second amplification module and modular converter;The time schedule controller exports the first clock signal to described first Chopping switch and the first amplification module, export second clock signal to the switch-capacitor filtering module, and, when exporting the 3rd Clock signal is to the modular converter;Wherein, the second clock signal is than first scheduled time of the first clock signal delay, 3rd clock signal is than second scheduled time of second clock signal delay.Wherein, technology provided by the utility model Scheme, by being extended to the function of existing Magnetic Sensor, can reduce integrated circuit cost, improve reliability.

Brief description of the drawings

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, drawings in the following description are 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 a are a kind of structure diagram of Magnetic Sensor provided by the embodiments of the present application;

Fig. 1 b are a kind of time diagram provided by the embodiments of the present application;

Fig. 2 is a kind of structure diagram of rectification circuit provided by the embodiments of the present application;

Fig. 3 a are the structure diagram of a kind of magnetic measuring sensor provided by the embodiments of the present application and the first chopping switch;

Fig. 3 b are the sequence diagram of four sub-clock signals;

Fig. 3 c are the signal control schematic diagram of discharge switch and the first chopping switch;

Fig. 3 d are the signal schematic representation in circuit shown in Fig. 3 a;

Fig. 4 is a kind of structure diagram of first amplification module provided by the embodiments of the present application;

Fig. 5 is a kind of structure diagram of switch-capacitor filtering module provided by the embodiments of the present application;

Fig. 6 a are the structure diagram of another switch-capacitor filtering module provided by the embodiments of the present application;

Fig. 6 b are a kind of Fig. 6 a sequence diagrams accordingly;

Fig. 6 c are a kind of structure diagram of adder provided by the embodiments of the present application;

Fig. 7 a are a kind of structure diagram of modular converter provided by the embodiments of the present application;

Fig. 7 b are a kind of principle schematic for judging polarity of the magnetic field provided by the embodiments of the present application;

Fig. 8 is each signal output schematic diagram under a kind of cycle clock signal provided by the embodiments of the present application;

Fig. 9 is a kind of structure diagram of Magnetic Sensor integrated circuit provided by the embodiments of the present application;

Figure 10 is the circuit diagram of output control circuit provided by the embodiments of the present application;

Figure 11 is the circuit diagram of another output control circuit provided by the embodiments of the present application;

Figure 12 is the circuit diagram of another output control circuit provided by the embodiments of the present application;

Figure 13 is the electrical block diagram of electric machine assembly provided by the embodiments of the present application;

Figure 14 is the structure diagram of synchronous motor provided by the embodiments of the present application.

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 Clearly and completely describe, 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.

As described in background, in the prior art, Magnetic Sensor is typically only capable to output field detection result, specific works When also need to additionally set peripheral circuit, the field detection result is handled, therefore integrated circuit cost is higher, reliably Property is poor.

Based on this, the embodiment of the present application provides a kind of Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and family expenses Electric appliance, by being extended to the function of existing Magnetic Sensor, can reduce integrated circuit cost, improve reliability.For reality Existing above-mentioned purpose, technical solution provided by the embodiments of the present application is as follows, and specifically with reference to shown in Fig. 1 a to Figure 14, the application is implemented The technical solution that example provides is described in detail.

Wherein, refering to what is shown in Fig. 1, being a kind of structure diagram of Magnetic Sensor provided by the embodiments of the present application, wherein, institute Magnetic Sensor is stated, including:

Rectification circuit 100, magnetic field detection circuit 200 and time schedule controller 300;

The rectification circuit 100 is used to external power supply being converted to DC power supply, to be supplied for the magnetic field detection circuit 200 Electricity;

The magnetic field detection circuit 200 is used to export magnetic field detection signal according to the change of external magnetic field, wherein, the magnetic Field detecting circuit 200 includes sequentially connected magnetic measuring sensor 201, the first chopping switch 202, the first amplification module 203, switch electricity Capacitor filter module 204, the second amplification module 205 and modular converter 206;

The time schedule controller 300 exports the first clock signal to 202 and first amplification module of the first chopping switch 203, second clock signal is exported to the switch-capacitor filtering module 204, and, the 3rd clock signal of output to the conversion Module 206;Wherein, the second clock signal is than first scheduled time of the first clock signal delay, the second clock Signal is more than the described second pre- timing than second scheduled time of the 3rd clock signal delay, and first scheduled time Between.In originally mode is applied, the modular converter 206 is analog-to-digital conversion module.

In order to ensure to export the accuracy of signal, between the first clock signal, second clock signal and the 3rd clock signal With certain delay.Optionally, first scheduled time provided by the embodiments of the present application is the 1/4 of first clock signal Cycle.And second scheduled time was 5 nanoseconds.Also, first clock signal provided by the embodiments of the present application, Two clock signals are identical with the frequency of the 3rd clock signal.Wherein, it is provided by the embodiments of the present application shown in optional reference chart 1b A kind of time diagram is, it is necessary to illustrate, the first clock signal to the 3rd clock signal is only to represent three signals in figure Between priority sequential relationship (that is, optional first scheduled time is 1/4 cycle of first clock signal, and, The second clock signal is than 5 nanosecond of the 3rd clock signal delay) and frequency relation (that is, described first clock signal, Two clock signals are identical with the frequency of the 3rd clock signal), when not representing Magnetic Sensor work provided by the embodiments of the present application Actual signal.

As shown in Figure 1, external power supply provided by the embodiments of the present application can be AC power, rectification circuit 100 includes Connect 11 and second input port 12 of first input port of external ac power source;Rectification circuit 100 turns external ac power source DC power supply is changed to, connected magnetic field detection circuit 200 is then transmitted to and is directly or indirectly powered.Wherein, Magnetic field detection circuit 200 is used for the DC voltage that rectification circuit 100 exports and perceive the change output magnetic field of external magnetic field Detect signal.

In the specific embodiment of the application, rectification circuit 100 can include full-wave rectification bridge and and full-wave rectification The voltage regulation unit of the output connection of bridge, wherein, full-wave rectification bridge is used to the AC signal of AC power output being converted to direct current Signal, and voltage regulation unit is used for the direct current signal stabilization by full-wave rectification bridge output in values.It may be referred to Fig. 2 institutes Show, be a kind of structure diagram of rectification circuit provided by the embodiments of the present application, wherein, full-wave rectification bridge 110 includes:Series connection First diode 111 and the second diode 112 and the 3rd diode 113 and the 4th diode 114 of series connection;Described 1st The common port of pole pipe 111 and second diode 112 is electrically connected for first input port 11 with the VAC+ of AC power;It is described The common port of 3rd diode 113 and the 4th diode 114 is electrically connected for the second input port 12 and the VAC- of AC power Connect.

Wherein, the input terminal of first diode 111 and the input terminal of the 3rd diode 113 are electrically connected to form entirely First output terminal V1 of ripple rectifier bridge 110, the output of the output terminal of second diode 113 and the 4th diode 114 End is electrically connected to form the second output terminal V2 of full-wave rectification bridge 110.The direct current of the second output terminal V2 outputs 16V or so Pressure.

And voltage regulation unit 120 includes being connected between the first output terminal of full-wave rectification bridge 110 and the second output terminal First zener diode 121, first resistor 122, second resistance 123, the second zener diode 124 and transistor 125;Wherein, The anode of the anode of first zener diode 121 and the second zener diode 124 is all connected with the first output of full-wave rectification bridge 110 End, the cathode of the first zener diode 121 and the first end of first resistor 122 are all connected with the second output of full-wave rectification bridge 110 End, the first end of second end connection second resistance 123 and the first end of transistor 125 of first resistor 122, second resistance 123 Second end connection transistor 125 grid and the second zener diode 124 cathode, wherein, the second end of transistor 125 and The anode of second zener diode 124 is respectively as two output terminals of voltage regulation unit 120, i.e. two outputs of rectification circuit End.Wherein, the first output terminals A VDD output voltage of rectification circuit is the DC voltage of 5V or so, and the second output terminals A VSS is to connect Ground terminal.

As shown in Figure 1, magnetic field detection circuit 200 includes sequentially connected magnetic measuring sensor 201, the first chopping switch 202, the One amplification module 203, switch-capacitor filtering module 204, the second amplification module 205 and modular converter 206;Wherein, magnetic measuring sensor 201 input terminal is connected with the output terminal of rectification circuit 100, for perceiving the polarity of external magnetic field and exporting magnetic field differential signal To the first chopping switch 202;First chopping switch 202 is according to the control of the time schedule controller 300, according to the magnetic strength The magnetic field perceptual signal generation differential signal that device 201 exports is surveyed, and the magnetic field differential signal is modulated respectively with deviation signal To high-frequency region and baseband frequency.Preferably, the high-frequency region frequency is more than 100K hertz, the baseband frequency is less than 200 Hertz.

Specifically with reference to shown in Fig. 3 a to Fig. 3 c, Fig. 3 a are a kind of magnetic measuring sensor provided by the embodiments of the present application and the first copped wave The structure diagram of switch, Fig. 3 b are the sequence diagram of four sub-clock signals, and, Fig. 3 c open for discharge switch and the first copped wave The signal control schematic diagram of pass.

Wherein, the magnetic measuring sensor 201 includes four contact terminals, wherein, magnetic measuring sensor 201 includes the be oppositely arranged One terminal A and third terminal C, and the Second terminal B and forth terminal D being oppositely arranged;In the embodiment of the present application, magnetic strength is surveyed Device 201 is Hall pole plate, and magnetic measuring sensor 201 is driven by the first power supply 13, and the first power supply 13 can be that rectification circuit 100 carries For.In the present embodiment, the power supply 13 is constant-current source independent of temperature variations.

First chopping switch 202 includes eight switches of K1 to K8 in Fig. 3 a, is connected between four contact terminals, its In, the first chopping switch 202 includes the be respectively connected to the first power supply 13 between the first terminal A and Second terminal B One switch K1 and second switch K2, the 3rd ground terminal GND is respectively connected between the third terminal C and forth terminal D The switch K4 of K3 and the 4th are switched, the first output terminal P is connected to the 6th switch of the third terminal C and forth terminal D respectively The switch K5 of K6 and the 5th, and, the second output terminal N is connected to the Second terminal B and the first terminal A respectively the 7th switchs The switches of K7 and the 8th K8.

Wherein, first clock signal includes the first sub-clock signal CK2B, the second sub-clock signal CK1B, the 3rd son Clock signal CK2 and the 4th sub-clock signal CK1, the first switch K1 and second switch K2 are respectively by first sub-clock Signal CK2B and the second sub-clock signal CK1B controls, the 3rd switch K3 and the 4th switch K4 are believed by the 3rd sub-clock respectively Number CK2 and the 4th sub-clock signal CK1 controls, the 5th switch K5 and the 6th switch K6 are believed by the 3rd sub-clock respectively Number CK2 and the 4th sub-clock signal CK1 controls, the 7th switch K7 and the 8th switch K8 are believed by the 3rd sub-clock respectively Number CK2 and the 4th sub-clock signal CK1 controls.

In order to ensure the accuracy of signal output, first clock signal includes at least two non-overlapping sub-clock signals. Wherein, the first sub-clock signal CK2B and the 3rd sub-clock signal CK2 is on the contrary, the second sub-clock signal CK1B and Four sub-clock signal CK1 are on the contrary, and the 3rd sub-clock signal CK2 and the 4th sub-clock signal CK1 is non-overlapping sub-clock Signal.

Wherein, turned in the first terminal A and the first power supply 13, and when third terminal C is turned on ground terminal GND, second end Sub- B is turned on the second output terminal N, forth terminal D and the first output terminal P conductings;Turned in Second terminal B and the first power supply 13, And forth terminal D, when being turned on ground terminal GND, the first terminal A is turned on the second output terminal N, third terminal C and the first output terminal P is turned on.Wherein, it is P1 and N1 that the first output terminal P and the second output terminal N, which exports a differential signal,.

In addition, in addition to above-mentioned 201 and first chopping switch 202 of magnetic measuring sensor, Magnetic Sensor, which further includes, is connected to first end The first discharge line 14 between sub- A and third terminal C, i.e. circuit between the first terminal A and third terminal C, and, connection The second discharge line 15 between Second terminal B and forth terminal D, i.e. the circuit between Second terminal B and forth terminal D; When the first terminal A and third terminal C are that power input, Second terminal B and forth terminal D are before magnetic strength knows signal output part, Second discharge line 15 turns on;When the first terminal A and third terminal C knows signal output part, Second terminal B and the 4th end for magnetic strength Sub- D is before power input, the first discharge line 14 turns on.

In a possible implementation, the first discharge line 14 can include the first discharge switch S1 and second of series connection Discharge switch S2, the first discharge switch S1 and the second discharge switch S2 are respectively by the first sub-clock signal CK2B and institute State the control of the second sub-clock signal CK1B;Second discharge line 15 includes the electric discharges of the 3rd discharge switch S3 and the 4th of series connection S4 is switched, the 3rd discharge switch S3 and the 4th discharge switch S4 are respectively by the first sub-clock signal CK2B and described the The control of two sub-clock signal CK1B.

When the first terminal A and the third terminal C are power input, the Second terminal B and the 4th end When sub- D knows signal output part for magnetic strength, and the first sub-clock signal CK2B's and the second sub-clock signal CK1B During overlapping, the first discharge switch S1 and the second discharge switch S2 are simultaneously turned on;As the first terminal A and described Third terminal C knows signal output part for magnetic strength, when the Second terminal B and the forth terminal D are power input, and in institute State the overlapping period of the first sub-clock signal CK2B and the second sub-clock signal CK1B, the 3rd discharge switch S3 and institute The 4th discharge switch S4 is stated to simultaneously turn on.

As shown in Figure 3b, four sub-clock signals include two non-overlapping control signals, i.e., described 3rd sub-clock signal CK1 and the 4th sub-clock signal CK2, and two overlapping control signals, i.e. the second sub-clock signal CK1B and the first sub-clock Signal CK2B.Wherein, CK1 with CK1B on the contrary, CK2 is opposite with CK2B.The overlapping sub-clock signal CK1B and CK2B is overlapping Period between period, i.e. two dotted lines, is high level.The non-overlapping sub-clock signal CK1 and CK2 of above-mentioned two, and The frequency of two overlapping sub-clock signal CK1B and CK2B can be 100K-600KHz, including endpoint value, wherein being preferably 400KHz。

In the embodiment of the present application, eight switches that the first chopping switch 202 includes, and four that discharge line includes Discharge switch all can be transistor switch.Further, with reference to shown in Fig. 3 c, when CK1 is high level, CK2B is high electricity Flat, CK2 and CK1B are that low level, at this time the Second terminal B and the forth terminal D are to be respectively turned on the first power supply and ground connection GND is held, is power input, and the switch conduction between the third terminal C and the first output terminal P, the first end Switch conduction between sub- A and the second output terminal N, then the first terminal A and third terminal C is magnetic perceptual signal Output terminal.CK1 just from high level be changed into low level after a bit of time in, i.e. in Fig. 3 b between first group of two dotted line Period, is the overlapping phase of two overlapping sub-clock signal CK1B and CK2B, CK1B and CK2B is high level during this, described The 3rd discharge switch S3 and the 4th discharge switch S4 between Second terminal B and the forth terminal D is both turned on, and described It is short-circuit between two-terminal B and the forth terminal D, eliminate what the parasitic capacitance between Second terminal B and forth terminal D stored Electric charge.Hereafter, when CK1 is low level, CK2B is low level, and CK2 and CK1B are high level, at this time the first terminal A and The third terminal C is power input to be respectively turned on the first power supply and ground terminal GND, and the Second terminal B with it is described Switch conduction between first output terminal P, the switch conduction between the forth terminal D and the second output terminal N are then described The Second terminal B and forth terminal D knows signal output part for magnetic strength.CK1 just from low level be changed into high level before it is one small In the section time, i.e. the period in Fig. 3 b between second group of two dotted line, is overlapping for two sub-clock signals CK1B and CK2B Phase, CK1B and CK2B is high level during this, first electric discharge between the first terminal A and the third terminal C Switch S1 and the second discharge switch S2 is both turned on, short-circuit between the first terminal A and the third terminal C, eliminates first The electric charge of parasitic capacitance storage between terminal A and third terminal C.

Fig. 3 d are the signal schematic representation in circuit shown in Fig. 3 a.Wherein, CK is clock signal;Vos is magnetic measuring sensor 201 Deviation voltage signal, the physical property of Hall Plate 201 determine, it can be assumed that its any moment in clock signal period is all Remain unchanged.Vin and-Vin is that the first chopping switch is exported in the first half cycle of clock signal CK and the output of later half cycle The preferable output of preferable field voltage signal, i.e. 201 zero deflection signal interference of Hall Plate.As previously described, in clock signal CK A half period, wire connection terminal A and C respectively with the first power supply and ground turn on, wire connection terminal B and D as output terminal conducting; When another half period the wire connection terminal B and D of clock signal CK is turned on the first power supply and ground respectively, wire connection terminal A and C conduct Output terminal turns on.In former and later two half periods of clock signal CK, the preferable field voltage signal of the first chopping switch output is big Small equal, direction is opposite.Vout is the output signal of the first chopping switch, is deviation signal Vos and preferable magnetic field signal Vin Superposition.By the first chopping switch, above-mentioned actually detected signal modulation to high-frequency region.

In a kind of embodiment of the application, the preferable field voltage signal of the magnetic measuring sensor output is very small, leads to Often there was only several millivolts of zero point, deviation signal Vos is close to 10 millivolts, therefore the later stage needs to eliminate deviation signal, and to preferable magnetic field Voltage signal carries out high-gain processing.

In the embodiment of the present application, the magnetic perceptual signal that magnetic measuring sensor 201 exports includes actually detected signal and deviation Signal, actually detected signal be magnetic measuring sensor 201 detect with the matched preferable field voltage signal in external magnetic field, it is and inclined Difference signal is the inherent variability of magnetic measuring sensor 201.Wherein, the preferable field voltage signal that magnetic measuring sensor 201 exports is very small, leads to Often only several millivolts of zero point, and deviation signal is then close to 10 millivolts, thus the later stage need to eliminate deviation signal, and to preferable magnetic field Voltage signal carries out high-gain processing.As shown in Figure 1, control of first amplification module 203 according to the time schedule controller 300 System, gain amplification is carried out to the differential signal of first chopping switch 202 output, and first chopping switch 202 is defeated Exported after actually detected signal demodulation low frequency region in the differential signal gone out.

With specific reference to shown in Fig. 4, being a kind of structure diagram of first amplification module provided by the embodiments of the present application, its In, the first amplification module can be chopper amplification module, i.e. first amplification module includes sequentially connected first amplifier A1, the second chopping switch Z2 and the second amplifier A2;

The first amplifier A1 and the second amplifier A2 is used to carry out gain amplification to the signal of input, and described second cuts Ripple switch Z2 is used in the differential signal that exports first chopping switch 202 under the control of first clock signal Actually detected signal solution is transferred to low frequency region.Wherein, the first amplifier A1 is collapsible amplifier, and the second amplifier A2 can be One-stage amplifier.

Wherein, in the embodiment of the present application, the output of the first amplifier A1 is also differential signal a P1 and N1;Second copped wave is opened Close the first half cycles that are configured as in each clock cycle of Z2 and directly export the differential signal, and it is later half in each clock cycle Cycle exports after two unlike signals in the differential signal are exchanged, and defines a pair of of output signal table of the second chopping switch Z2 It is shown as P2 and N2.

As shown in Figure 1, after early period signal processing, it is necessary to by the differential signal that the first amplification module 203 exports into Row eliminates the processing of deviation signal.Wherein, the switch-capacitor filtering module 204 is according to the control of the time schedule controller 300, Sampling filter is carried out to the differential signal of first amplification module 203 output.It is specifically, refering to what is shown in Fig. 5, real for the application A kind of structure diagram of switch-capacitor filtering module of example offer is provided, wherein, the switch-capacitor filtering module includes:First Switch capacitor filter SCF1, second switch capacitive filter SCF2, the switch electricity of the 3rd switch capacitor filter SCF3 and the 4th Capacitor filter device SCF4, and each switch capacitor filter includes at least two switches, at least two switch is believed by non-overlapping clock Number control.That is, in order to ensure the accuracy of signal output, second clock signal includes at least two non-overlapping sub-clock signals, and At least two switches of each switch capacitor filter are controlled by least two non-overlapping sub-clock signal.

Wherein, it is respectively the first sub- difference letter that the differential signal of the first amplification module output, which includes two sub- differential signals, Number P2 and second sub- differential signal N2, the first switch capacitive filter SCF1 of switch-capacitor filtering module 204 and the 3rd switch The first half cycle of differential signal P2 to first and later half cycle sample capacitive filter SCF3 respectively, and second switch is electric Capacitor filter device CF2 and the 4th switch capacitor filter SCF4 first half cycle of differential signal N2 to second and the later half cycle respectively Sampled.

Specifically, with reference to shown in Fig. 6 a and Fig. 6 b, Fig. 6 a are another switch-capacitor filtering provided by the embodiments of the present application The structure diagram of module, Fig. 6 b are corresponding a kind of sequence diagram in Fig. 6 a, wherein, switch-capacitor filtering module includes:First Switch capacitor filter SCF1 to the 4th switch capacitor filter SCF4, each switch capacitor filter are opened by two transmission gates Close and corresponding two capacitances composition is (with reference to structure in dotted line frame in figure 6a).Wherein, the switch capacitor filter that the application provides It is same as the prior art, therefore the description on redundant structure is not done.

Wherein, since first switch capacitive filter SCF1 and second switch capacitive filter SCF2 are to differential signal First half cycle is sampled, and the 3rd switch capacitor filter SCF3 and the 4th switch capacitor filter SCF4 are to differential signal The later half cycle sampled.

Therefore, four sub-clock signals are included with reference to second clock signal in Fig. 6 a, each sub-clock signal CK1 ', CK2 ', CK1B ' and CK2B ' access the position of transmission gate switch and the shown sequential of Fig. 6 b to control each transmission gate switch; Wherein,

When differential signal inputs, in the first half cycle of differential signal, first switch capacitive filter SCF1 and second is opened The previous transmission gate switch TG1 for closing capacitive filter SCF2 is opening, first switch capacitive filter SCF1 and second The latter transmission gate switch TG2 of switch capacitor filter SCF2 is in off state, and the 3rd switch capacitor filter SCF3 and The previous transmission gate switch TG1 of 4th switch capacitor filter SCF4 is in off state, the 3rd switch capacitor filter SCF3 The latter transmission gate switch TG2 with the 4th switch capacitor filter SCF4 is opening;Then, in the later half of differential signal The previous transmission gate switch TG1 of cycle, first switch capacitive filter SCF1 and second switch capacitive filter SCF2 are pass The latter transmission gate switch TG2 of closed state, first switch capacitive filter SCF1 and second switch capacitive filter SCF2 is Opening, and the previous transmission gate switch of the 3rd switch capacitor filter SCF3 and the 4th switch capacitor filter SCF4 TG1 is opening, and the latter transmission gate of the 3rd switch capacitor filter SCF3 and the 4th switch capacitor filter SCF4 are opened Close TG2 to be in off state, with this, realize first switch capacitive filter SCF1 and the 3rd switch capacitor filter SCF3 difference the The first half cycle of one sub- differential signal and later half cycle be sampled as the first, the 3rd sub-sampled signals P2A and P2B, and second Switch capacitor filter CF2 and the 4th switch capacitor filter SCF4 first half cycles to the second sub- differential signal and later half respectively Cycle carries out being sampled as the second, the 4th sub-sampled signals N2A and N2B.

Further, with reference to shown in figure 6a, switch-capacitor filtering module provided by the embodiments of the present application, which further includes, to be arranged at Two groups of capacitance groups between first switch capacitive filter SCF1 and second switch capacitive filter SCF2, each capacitance group include Two capacitances in parallel, and a capacitance group is connected to the common port of two transmission gate switches of first switch capacitive filter SCF1 Between the common port of two transmission gate switches of second switch capacitive filter SCF2, and, another capacitance group is connected to Between the TG2 output terminals of one switch capacitor filter SCF1 and the TG2 output terminals of second switch capacitive filter SCF2;And Two groups of capacitance groups being arranged between the 3rd switch capacitor filter SCF3 and the 4th switch capacitor filter SCF4 are further included, often One capacitance group includes two capacitances in parallel, and a capacitance group is connected to two transmission gates of the 3rd switch capacitor filter SCF3 Between the common port of two transmission gate switches of the common port of switch and the 4th switch capacitor filter SCF4, and, Ling Yi electricity Appearance group is connected to the TG2 outputs of the TG2 output terminals and the 4th switch capacitor filter SCF4 of the 3rd switch capacitor filter SCF3 Between end.

Wherein preferable, in capacitance group provided by the embodiments of the present application, two capacitances can be MIM capacitor, i.e. capacitance group For two MIM capacitor C ' being arranged in parallel.

In the present embodiment, the second clock signal of the switch capacitor filter is delayed than first clock signal One first scheduled time, such as 1/4 cycle (second clock signal was delayed for 1/4 cycle than the first clock signal as shown in Figure 6 b), from And the peaks and troughs of differential signal is avoided as sampled point, improve the accuracy of signal sampling.

The switch-capacitor filtering module 204 further includes adder 2041.The adder 2041 is used for the switch The signal that capacitor filtering module 204 exports exports after eliminating deviation signal processing and gain amplification by phase add mode, output one To differential signal P3 and N3.Wherein, the adder 2041 can be trsanscondutance amplifier, and the gain of the trsanscondutance amplifier is 2。

It is a kind of structure diagram of adder provided by the embodiments of the present application with reference to shown in figure 6c, adder includes one Operational amplifier A ' and three voltage current adapters be respectively first voltage current converter M1, second voltage current converter M2 and tertiary voltage current converter M3.Each voltage current adapter is connected with current source, and each Voltage to current transducer Device includes two metal-oxide-semiconductors.Wherein, a metal-oxide-semiconductor of first voltage current converter M1 grid access sampled signal P2A and The in-phase end of the output terminal concatenation operation amplifier A ' of the metal-oxide-semiconductor, the grid of another metal-oxide-semiconductor access sampled signal N2A and should The end of oppisite phase of the output terminal concatenation operation amplifier A ' of metal-oxide-semiconductor;The grid access of a metal-oxide-semiconductor of second voltage current converter M2 The in-phase end of the output terminal concatenation operation amplifier A ' of sampled signal P2B and the metal-oxide-semiconductor, the grid access sampling of another metal-oxide-semiconductor The end of oppisite phase of the output terminal concatenation operation amplifier A ' of signal N2B and the metal-oxide-semiconductor;And the one of tertiary voltage current converter M3 Metal-oxide-semiconductor grid access operational amplifier A ' output differential signal N3 and the metal-oxide-semiconductor output terminal concatenation operation amplifier A ' In-phase end, and the grid of another metal-oxide-semiconductor access operational amplifier A ' output differential signal P3 and the metal-oxide-semiconductor output terminal The end of oppisite phase of concatenation operation amplifier A '.Wherein, input is converted to electricity by the voltage current adapter of adder using signal Deviation is eliminated by phase add mode after stream, and is exported after the amplification of its op-amp gain.

Wherein, second amplification module 205 is further put the magnetic field differential signal that the adder 2041 exports Greatly.Preferably, the second amplification module 205 can be programmable gain amplifier, and the gain of the programmable gain amplifier For 5.

In the present embodiment, the field voltage signal is through first amplification module, adder and the second amplification mould Block gain amplifier is preferably 800-2000, it is therefore preferable to 1000.In other embodiments, can by by the first amplification module, Adder and the second amplification module are arranged to different gain so that field voltage signal is amplified to required gain.

Finally, the modular converter 206 is according to the control of the time schedule controller 300, by second amplification module 205 The differential signal of output exports after being converted to digital signal.Specifically, it is provided by the embodiments of the present application one with reference to shown in figure 7a The structure diagram of kind modular converter, wherein, the modular converter includes:

First comparator C1, the second comparator C2 and latching logic circuit S;Wherein, the first comparator C1 and second Comparator C2 connects a pair of of differential reference voltage Vh and Vl and a pair of of differential signal P3 of second amplification module output respectively And this of N3, first comparator C1 and the second comparator C2 are to differential reference voltage reversal connection.First comparator C1 is used for second Compared with a higher thresholds Rh, the second comparator C2 is used for the output of the second amplification module the voltage signal of amplification module output Voltage signal is compared with a lower threshold Rl.The output terminal of the first comparator C1 and the second comparator C2 are transfused to institute State latching logic circuit S.

Wherein, with reference to shown in Fig. 7 b, the first comparator C1 is configured as exporting the second amplification module output The magnetic field intensity of the comparative result or the external magnetic field of voltage signal and a higher thresholds Rh and the comparison of predetermined work point Bop As a result, the second comparator C2 is configured as exporting the voltage signal of the second amplification module output and the ratio of a lower threshold Rl Relatively result or the magnetic field intensity of external magnetic field and the comparative result of predetermined point of release Brp;

The comparative result that the latching logic circuit S is configured as first comparator C1 is to represent second amplification module The voltage signal of output makes the letter when reaching predetermined work point Bop more than the magnetic field intensity of higher thresholds Rh or external magnetic field Number processing unit 300 exports the first level (such as high level), and expression external magnetic field is a kind of magnetic polarity;

When the comparative result of the second comparator C2 is to represent the voltage signal of second amplification module output be less than should be compared with When the magnetic field intensity of Low threshold Rl or external magnetic field is not up to predetermined point of release Brp, make the signal processing unit 300 output with The opposite second electrical level of first level (low level), it is another magnetic polarity to represent external magnetic field;

When the comparative result of the first comparator C1 and the second comparator C2 represent the second amplification module output Voltage signal is between the higher thresholds Rh and lower threshold Rl, or represents the magnetic field intensity of external magnetic field in the work When between point Bop and the point of release Brp, the output of the signal processing unit 300 is set to keep former output state constant.

The second clock signal is exported to the 3rd clock signal delay of the latching logic circuit S than time schedule controller One second scheduled time, such as 5 nanoseconds, so that the noise that the switching point for avoiding the switch capacitor filter produces is so as to adopt Collect correct signal.The logic latch cicuit S is connected with the time schedule controller, described in the logic latch cicuit reception 3rd clock signal, ensures that output state will not change with the change of input state by the logic latch cicuit S, keeps Output state is constant.

The signal processing of signal processing unit provided by the embodiments of the present application is further described with reference to Fig. 8. Wherein, Fig. 8 left sides show each differential signal output of each module under cycle clock signal, and the right is that corresponding signal frequency domain shows It is intended to.

From it is presented hereinbefore to content it was found from, the output signal Vout of the first chopping switch is deviation signal Vos and ideal The superposition of magnetic field signal Vin, while the difference equal to differential signal P1 and N1, differential signal P1 and N1 is equal in magnitude, direction phase Instead.Understood according to previously mentioned in former and later two half periods of clock signal CK1, the preferable magnetic field electricity of the first chopping switch output Pressure signal magnitude is equal, and direction is opposite.Illustrated with reference to 7 left side of figure, signal P1 in clock signal, use respectively by former and later two half periods P1A and P1B represents that former and later two half periods are represented signal N1 with N1A and N1B respectively in clock signal, its output is respectively:

P1A=(Vos+Vin)/2;P1B=(Vos-Vin)/2

N1A=-P1A=- (Vos+Vin)/2;N1B=-P1B=- (Vos-Vin)/2

For ease of understanding, the coefficient 1/2 of differential signal is omitted in description below, is cut by the first amplifier A1, second The input signal of ripple switch is a pair of of differential signal P1 ' and N1 ', and signal P1 ' in clock signal, use respectively by former and later two half periods P1A ' and P1B ' represents that signal N1 ' is represented with N1A ' and N1B ' respectively in former and later two half periods of clock signal.Due to described The bandwidth limitation of one amplifier A1, the differential signal exported through the first amplifier A1 is triangular wave differential signal, Xia Shugong Formula is only signal form, its output is respectively:

P1A '=A (Voff+Vin)/2;P1B '=A (Voff-Vin)/2

N1A '=- P1A '=- A (Voff+Vin)/2;N1B '=- P1B '=- A (Voff-Vin)/2

Wherein, A is the amplification factor of the first amplifier, and Voff is the deviation in the output signal of the first amplifier, is equal to The sum of the droop Vos of magnetic measuring sensor and the deviation of the first amplifier, since the bandwidth of the first amplifier A1 limits, institute It is change to state deviation Voff.For ease of understanding, the coefficient of differential signal and the amplification system of amplifier are omitted in description below Number.

Then after switch-capacitor filtering module:

The first half cycle that second chopping switch Z2 was configured as in each clock cycle directly export this to differential signal and This exchanges differential signal in the later half cycle of each clock cycle and exports, a pair of of differential output signal of the second chopping switch It is expressed as P2 and N2.In clock signal, former and later two half periods are represented signal P2 with P2A and P2B respectively, and signal N2 believes in clock Number former and later two half periods represent that its output is respectively with N2A and N2B respectively:

P2A=P1A '=(Voff+Vin);P2B=N1B '=- (Voff-Vin)

N2A=N1A '=- (Voff+Vin);N2B=P1B '=(Voff-Vin);

Four switch capacitor filter in switch-capacitor filtering module 204 in differential signal P2 and N2 for each believing Number, gathered data and it is divided into two-way sampled signal respectively within former and later two half periods of each clock cycle and each exports, i.e., Switch-capacitor filtering module gathers two pairs of sampled signals:A pair is P2A and P2B, and another pair is N2A and N2B.

The above-mentioned four road signals obtained through over-sampling pass through the adder, export P3 and N3;Adder samples two pairs Signal carries out addition processing respectively, its output is respectively:

P3=P2A+P2B=(Voff+Vin)+(- (Voff-Vin))=2Vin

N3=N2A+N2B=- (Voff+Vin)+(Voff-Vin)=- 2Vin

As can be seen that there was only enlarged preferable field voltage letter in switch-capacitor filtering module output signal P3 and N3 Number, deviation signal has been eliminated.

In addition, Magnetic Sensor integrated circuit provided by the embodiments of the present application further includes counter 207, the counter 207 It is connected with modular converter 206, the counter 207 is used for after preset time is counted, the number that the modular converter 206 is exported Word signal (i.e. magnetic field detection signal) exports, and number is exported afterwards by the 207 count delay regular hour of counter (such as 50 microseconds) Word signal, it is ensured that integrated circuit has enough response times.

Correspondingly, the embodiment of the present application additionally provides a kind of Magnetic Sensor integrated circuit, with specific reference to shown in Fig. 9, for this Apply for a kind of structure diagram for Magnetic Sensor integrated circuit that embodiment provides, wherein, Magnetic Sensor integrated circuit includes:

The Magnetic Sensor 10 that above-mentioned any one embodiment provides, further includes output port 20 and is connected to the output port Output control circuit 30 between 20 and magnetic field detection circuit (i.e. the magnetic field detection circuit of Magnetic Sensor 10);

The output control circuit 30 is used at least be based on the magnetic field detection signal, makes the Magnetic Sensor integrated circuit At least electricity is being flowed into from the output port 20 to the first state of exterior outflow electric current and from outside to the output port 20 Run under the one of state of the second state of stream.The output control circuit 30 is second defeated by the full-wave rectification bridge 110 The DC-voltage supply of outlet V2.Specifically, can be from the output port 20 to exterior the first shape for flowing out load current State or the second state that load current is flowed into from outside to the output port 20, can also be above-mentioned first state With the second state alternate run.Thus, in another embodiment of the utility model, the output control circuit 30 is further It can be configured as:When the integrated circuit conforms to a predetermined condition in response to a control signal, from the output port 20 to The first state of outside outflow load current and certainly exterior the second state to the output port 20 inflow load current are at least Run under one of state, the 3rd shape of the first state and the second state is being prevented when not meeting the predetermined condition Run under state.In a preferable example, the frequency of occurrences of the third state is directly proportional to the frequency of the AC power.

In Magnetic Sensor integrated circuit disclosed in the above embodiments of the present application, the third state of the output control circuit 30 Status Type can voluntarily be configured according to user demand, as long as the output control circuit 30 can be prevented to enter first state With the second state, for example, when the output control circuit 30 operates in the third state to the magnetic field induction signal without Response (can be understood as obtaining less than the magnetic field induction signal) makes the electric current of the output port 20 negative much smaller than described It (is, for example, less than a quarter of the load current, the electric current substantially can be with relative to the load current at this time to carry electric current Ignore).

The counter 207 is used to start timing after predetermined trigger signal is got, when timing duration reaches pre- timing When long, show that the Magnetic Sensor integrated circuit conforms to a predetermined condition start-up operation.More specifically, the predetermined trigger signal Can be that specific voltage rises the trigger signal for reaching and being generated during predetermined threshold in Magnetic Sensor integrated circuit, wherein, the spy Constant voltage for example can be the supply voltage of magnetic field detection circuit 130.Specifically, in a third condition, the counter 207 exists Start after obtaining predetermined trigger signal described in timing after scheduled duration, as described in 50 microseconds the entrance of output control circuit 30 first or Second state.

In one embodiment of the application, the output control circuit 30 includes:First switch and second switch, it is described First switch is connected in first current path with the output port, and the second switch is connected with the output port In second current path opposite with the first current path direction, the first switch and second switch are in the magnetic field Detect and selectively turned under the control of signal.Preferably, the first switch can be triode, the second switch can be with For triode or diode, the utility model does not limit this, depends on the circumstances.

Specifically, in one embodiment of the application, as shown in Figure 10, the first switch 31 turns on for low level, The second switch 32 turns on for high level, wherein, the first switch 31 is connected to the first electric current with the output port 20 In path, the second switch 32 is connected in the second current path with the output port 20, the first switch 31 and institute The control terminal for stating 32 two switches of second switch is all connected with Magnetic Sensor 10, and the current input terminal of first switch 31 connects high voltage (such as DC power supply), current output terminal are connected with the current input terminal of second switch 32, the current output terminal of second switch 32 Connect low voltage (such as ground terminal).If the magnetic field detection signal of the Magnetic Sensor output is low level, first switch 31 is led Logical, second switch 32 disconnects, and load current is flowed outwardly from high voltage through first switch 31 and output port 20, if the magnetic The magnetic field detection signal that sensor 10 exports is high level, and second switch 32 turns on, and first switch 31 disconnects, and load current is outside Portion flows into output port 20 and flows through second switch 32.

In another embodiment of the application, as shown in figure 11, the first switch 31 is the switch of high level conducting Pipe, the second switch 32 is one-way conduction diode, and the control terminal of first switch 31 connects magnetic with the cathode of second switch 32 Sensor 10.The output of the current input terminal connection rectification circuit of first switch 31, the current output terminal of first switch 31 and the The anode of two switches 32 is all connected with output port 20.Wherein, the first switch 31 and the output port 20 are connected to the In one current path, the output port 20, the second switch 32 and the Magnetic Sensor 10 are connected to the second current path In, if the magnetic field detection signal that the Magnetic Sensor 10 exports is high level, first switch 31 turns on, and second switch 32 disconnects, Load current self-rectifying circuit is flowed outwardly through first switch 31 and output port 20, if the magnetic field that the Magnetic Sensor 10 exports It is low level to detect signal, and second switch 32 turns on, and first switch 31 disconnects, and load current flows into output port 20 simultaneously from exterior Flow through second switch 32.It is appreciated that in the other embodiment of the application, the first switch 31 and the second switch 32 Can also be other structures, the utility model does not limit this, specifically depends on the circumstances.

In another embodiment of the application, the output control circuit 30 includes:Unidirectional conducting switch, it is described unidirectional Conducting switch is connected in first current path with the output port, the output terminal of the Magnetic Sensor and the output Port is connected in the second current path opposite with the first current path direction, and the unidirectional conducting switch is by the magnetic Field detecting signal controls, and first current path and second current path select under the control of the magnetic field detection signal Selecting property turns on.

Implemented as one kind, as shown in figure 12, the output control circuit 30 includes a unidirectional conducting switch 33, single Guide opens up pass 33 and is connected to the first current path with output port 20, its current input terminal can connect the output of Magnetic Sensor 10 End, the output terminal of Magnetic Sensor 10 can also be connected to output port 20 opposite with the first current path direction through resistance R1 The second current path in.Unidirectional conducting switch 33 is turned on when magnetic field induction signal is high level, and load current is through unidirectionally leading Open up pass 33 and output port 20 flows outwardly, unidirectional conducting switch 33 disconnects when the magnetic field induction signal is low level, bears Electric current is carried from exterior inflow output port 20 and flows through resistance R1 and Magnetic Sensor 10.

With reference to a concrete application, the Magnetic Sensor integrated circuit provided the embodiment of the present application is described.

As shown in figure 13, the embodiment of the present application additionally provides a kind of electric machine assembly, and 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 of the bidirectional conduction switch 3000 is electrically connected.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.

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 figure 14, the synchronous motor includes stator and can the rotating rotor 1001 of relative stator. 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 groove 1007 of indent is set on the polar arc face 1005 in stator poles portion, is removed on polar arc face 1005 and starts groove 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, it is allowed to which rotor can be with when being powered every time under the action of integrated circuit for motor 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 has more magnetic Pole, such as four, six etc..

Preferably, it is positive half period and the magnetic that the output control circuit 30, which is configured as in the AC power 1000, The magnetic field that field detecting circuit 20 detects the p-m rotor be the first polarity or the AC power 1000 be negative half-cycle and The magnetic field detection circuit 20 detect the p-m rotor magnetic field be with the described first opposite polarity second polarity chron, make institute State 3000 conducting of bidirectional conduction switch.When the AC power 1000 is negative half-cycle and p-m rotor is first polarity, Or the AC power 1000 is positive half period and the p-m rotor is the second polarity chron, switch the bidirectional conduction 3000 cut-offs.

On the basis of above-described embodiment, in one embodiment of the application, the output control circuit 30 is configured To be that the magnetic field that positive half period and the secondary sensor 10 detect the p-m rotor is the first pole in the AC power 1000 Property or the AC power 1000 for negative half-cycle and the Magnetic Sensor 10 detect the magnetic field of the p-m rotor for institute The first opposite polarity second polarity chron is stated, makes have driving current between the output port and bidirectional conduction switch 3000 Flow through, so that bidirectional conduction switch 3000 be turned on.When the AC power 1000 is negative half-cycle and p-m rotor is First polarity, or the AC power 1000 is positive half period and the p-m rotor is the second polarity chron, makes described Nothing drives a current through between output port and bidirectional conduction switch 3000.

Preferably, the output control circuit 30 is configured as the signal in the AC power 1000 output positioned at just half The magnetic field that cycle and the Magnetic Sensor 10 detect the p-m rotor is the first polarity chron, and control electric current is by the integrated circuit The bidirectional conduction switch 3000 is flowed to, and is located at negative half-cycle and magnetic biography in the signal of the AC power 1000 output The magnetic field that sensor 10 detects the p-m rotor be with the described first opposite polarity second polarity chron, control electric current is by described double Guide opens up pass 3000 and flows to the integrated circuit.In one preferred embodiment of the application, rectification circuit 100 is using shown in Fig. 2 Circuit, output control circuit 30 is using the circuit shown in Figure 10, the electric current input of first switch 31 in output control circuit 30 The voltage output end of end connection full-wave rectification bridge 110, the ground connection of the current output terminal connection full-wave rectification bridge 110 of second switch 32 Output terminal.When the signal that AC power 1000 exports is located at positive half period and the Magnetic Sensor 10 exports low level, output First switch 31 turns in control circuit 30 and second switch 32 disconnects, electric current flow successively through AC power 1000, motor 2000, The first input end of Magnetic Sensor integrated circuit 4000, reduction voltage circuit (not shown), the two or two pole of full-wave rectification bridge 110 The first switch 31 of pipe 112, output control circuit 30, flows to bidirectional conduction switch 3000 from output port and returns to AC power 1000;When the signal that AC power 1000 exports is located at negative half-cycle and the Magnetic Sensor 10 exports high level, output control First switch 31 disconnects in circuit 30 processed and second switch 32 turns on, and electric current is flowed out from AC power 1000, is opened from bidirectional conduction The inflow of pass 3000 output ports, the first diode 111 of second switch 32, full-wave rectification bridge 110 through output control circuit 30, First input end, the motor 2000 of Magnetic Sensor integrated circuit 4000 return to AC power 1000.When AC power 1000 exports Signal be located at positive half period and the Magnetic Sensor 10 and export high level, or the signal that AC power 1000 exports positioned at negative Half period and the Magnetic Sensor 10 export low level, and first switch 31 and second switch 32 cannot in output control circuit 30 Conducting.Thus, the change in polarity and magnetic field detection signal that the output control circuit 30 can be based on AC power 1000, make described Integrated circuit control bidirectional conduction switch 3000 switches between conducting and cut-off state in a predefined manner, so control stator around The step mode of group 1006, makes the variation magnetic field that stator produces coordinate the magnetic field position of rotor, only drags rotor along single direction Rotation, so as to ensure that rotor has fixed direction of rotation when motor is powered every time.

It is appreciated that above simply retouched with reference to a kind of possible application to what the Magnetic Sensor integrated circuit of the application was made State, the Magnetic Sensor that the application provides is not limited in above application, for example, being applied not only to motor driving, it may also be used for other Application with magnetic field detection.

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..

The embodiment of the present application provides a kind of Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and household electrical appliance, bag Include rectification circuit, magnetic field detection circuit and time schedule controller;The rectification circuit is used to external power supply being converted to DC power supply; The magnetic field detection circuit is used to export magnetic field detection signal according to the change of external magnetic field, wherein, the magnetic field detection circuit Including sequentially connected magnetic measuring sensor, the first chopping switch, the first amplification module, switch-capacitor filtering module, the second amplification mould Block and modular converter;The time schedule controller exports the first clock signal to first chopping switch and the first amplification module, Second clock signal is exported to the switch-capacitor filtering module, and, the 3rd clock signal of output to the modular converter;Its In, the second clock signal is than first scheduled time of the first clock signal delay, described in the 3rd clock signal ratio Second scheduled time of second clock signal delay.Wherein, technical solution provided by the embodiments of the present application, by being passed to existing magnetic The function of sensor is extended, and can reduce integrated circuit cost, improves reliability.In addition, institute provided by the embodiments of the present application Second clock signal is stated than first scheduled time of the first clock signal delay, when the second clock signal is than the described 3rd Second scheduled time of clock signal delay, ripple caused by avoid switching point to eliminate switch is set by this.

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 to 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 (16)

1. a kind of Magnetic Sensor, including rectification circuit, magnetic field detection circuit and time schedule controller;
The rectification circuit is used to external power supply being converted to DC power supply, powers for the magnetic field detection circuit;
The magnetic field detection circuit is used to export magnetic field detection signal according to the change of external magnetic field, wherein, the magnetic field detection Circuit includes magnetic measuring sensor, the first chopping switch, the first amplification module and switch-capacitor filtering module;
The time schedule controller exports the first clock signal to first chopping switch and the first amplification module, when exporting second Clock signal is to the switch-capacitor filtering module;Wherein, the second clock signal is than first clock signal delay first The scheduled time.
2. Magnetic Sensor according to claim 1, it is characterised in that the Magnetic Sensor further includes modular converter, described Time schedule controller exports the 3rd clock signal to the modular converter, and the second clock signal is than the 3rd clock signal Postponed for second scheduled time, and first scheduled time is more than second scheduled time.
3. Magnetic Sensor according to claim 1, it is characterised in that first scheduled time believes for first clock Number 1/4 cycle.
4. Magnetic Sensor according to claim 2, it is characterised in that second scheduled time was 5 nanoseconds.
5. Magnetic Sensor according to claim 1, it is characterised in that first clock signal, second clock signal and The frequency of 3rd clock signal is identical.
6. Magnetic Sensor according to claim 1, it is characterised in that it is non-overlapping that first clock signal includes at least two Sub-clock signal.
7. Magnetic Sensor according to claim 2, it is characterised in that it is non-overlapping that the second clock signal includes at least two Sub-clock signal.
8. Magnetic Sensor according to claim 2, it is characterised in that first clock signal, second clock signal and The frequency of 3rd clock signal is 100K-600K hertz, including endpoint value.
9. Magnetic Sensor according to claim 1, it is characterised in that the magnetic measuring sensor includes the first end being oppositely arranged Son and third terminal, and the Second terminal and forth terminal being oppositely arranged;
First chopping switch includes first be respectively connected to the first power supply between the first terminal and Second terminal Switch and second switch, the 3rd switch and the 4th ground terminal being respectively connected between the third terminal and forth terminal are opened Closing, the 6th switch and the 5th being connected to the first output terminal between the third terminal and forth terminal respectively switchs, and, The 7th switch and the 8th switch the second output terminal being connected to respectively between the Second terminal and the first terminal;
Wherein, first clock signal includes the first sub-clock signal, the second sub-clock signal, the 3rd sub-clock signal and the Four sub-clock signals, the first switch and second switch are respectively by first sub-clock signal and the second sub-clock signal control System, the 3rd switch and the 4th switch are controlled by the 3rd sub-clock signal and the 4th sub-clock signal respectively, and the described 5th opens Close and the 6th switch is controlled by the 3rd sub-clock signal and the 4th sub-clock signal respectively, the 7th switch and the 8th is opened Close and controlled respectively by the 3rd sub-clock signal and the 4th sub-clock signal;
First sub-clock signal and the 3rd sub-clock signal are on the contrary, second sub-clock signal and the 4th sub-clock signal On the contrary, and the 3rd sub-clock signal and the 4th sub-clock signal are disjoint signals.
10. Magnetic Sensor according to claim 1, it is characterised in that the switch-capacitor filtering module includes:First opens Capacitive filter, second switch capacitive filter, the 3rd switch capacitor filter, the 4th switch capacitor filter are closed, and each Switch capacitor filter includes at least two switches, and at least two switch is controlled by non-overlapping clock signal.
11. Magnetic Sensor according to claim 1, it is characterised in that first amplification module includes sequentially connected First amplifier, the second chopping switch and the second amplifier;
First amplifier and the second amplifier are used to carry out the signal of input gain amplification, and second chopping switch is used By the actually detected signal in the differential signal of first chopping switch output under the control in first clock signal Solution is transferred to low frequency region.
12. Magnetic Sensor according to claim 2, it is characterised in that the Magnetic Sensor, which further includes, is connected to described open The second amplification module between powered-down capacitor filter module and the modular converter, the modular converter include first comparator, the Two comparators and latching logic circuit;Wherein, the first comparator and the second comparator connect a pair of of differential reference electricity respectively This of pressure and a pair of of differential signal of second amplification module output, first comparator and the second comparator are to differential reference electricity Press reversal connection;
Wherein, the first comparator is configured as exporting the voltage signal and a higher thresholds of the second amplification module output Comparative result or the external magnetic field magnetic field intensity and predetermined work point comparative result, the second comparator is configured as defeated Go out the voltage signal of second amplification module output and the comparative result of a lower threshold or the magnetic field intensity of external magnetic field and The comparative result of predetermined point of release;The comparative result that the latching logic circuit is configured as first comparator is to represent described The voltage signal of two amplification modules output makes when reaching predetermined work point more than the magnetic field intensity of the higher thresholds or external magnetic field The modular converter exports the first level, when the comparative result of the second comparator is the electricity that represents the second amplification module output When pressure signal is not up to predetermined point of release less than the magnetic field intensity of the lower threshold or external magnetic field, export the modular converter The second electrical level opposite with the first level, when the comparative result of the first comparator and the second comparator represents that described second puts The voltage signal of big module output is between the higher thresholds and lower threshold, or represents that the magnetic field intensity of external magnetic field exists When between the operating point and the point of release, the output of the modular converter is set to keep former output state constant.
13. a kind of Magnetic Sensor integrated circuit, including the Magnetic Sensor as described in claim 1-12 any one, further include defeated Exit port and the output control circuit being connected between the output port and magnetic field detection circuit;
The output control circuit is used at least be based on the magnetic field detection signal, the Magnetic Sensor integrated circuit is at least existed From the output port to the first state of exterior outflow electric current and from outside to the second shape of the output port inflow current Run under the one of state of state.
14. a kind of electric machine assembly, including the motor powered by an AC power;And Magnetic Sensor as claimed in claim 13 Integrated circuit.
A kind of 15. application apparatus with electric machine assembly as claimed in claim 14.
16. application apparatus according to claim 15, it is characterised in that the application apparatus is pump, fan, household electrical appliance Or vehicle.
CN201720457702.1U 2016-04-29 2017-04-27 A kind of Magnetic Sensor, Magnetic Sensor integrated circuit, electric machine assembly and application apparatus CN207301299U (en)

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