CN206038885U - Magnetic sensor integrated circuit , motor element and application apparatus - Google Patents

Abstract

The utility model discloses a magnetic sensor integrated circuit, motor element and application apparatus, including rectifier circuit, magnetism sensor, signal processing unit, output control circuit and output port, rectifier circuit is used for converting external power source into DC power supply, magnetism sensor receipt constant current source drives with the polarity of perception external magnetic field and exports the differential signal, signal processing unit is used for rightly the differential signal of magnetism sensor output enlarge with go the deviation to handle after export after converting magnetism sensing signal into, and output control circuit be used for at least based on magnetism sensing signal makes magnetic sensor integrated circuit is at least at oneself output port to the first state of outside outflow electric current and from outside to output port flows in one of them state of second state operation down of electric current. The utility model provides a technical scheme, function expand through the magnetic sensor integrated circuit to current can reduce whole circuit cost, improves the reliability.

Description

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

Technical field

The utility model is related to magnetic field detection technology field, more specifically, be related to a kind of Magnetic Sensor integrated circuit, Electric machine assembly and application apparatus.

Background technology

Magnetic Sensor is widely used in modern industry and electronic product with induced field intensity to measure electric current, position, side 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 prior art, Magnetic Sensor integrated circuit is typically only capable to export field detection result, also needs to during specific works It is extra that peripheral circuit is set, the field detection result is processed, therefore integrated circuit is relatively costly, reliability is poor.

Utility model content

In view of this, the utility model provides a kind of Magnetic Sensor integrated circuit, electric machine assembly and household electrical appliance, passes through The function of existing Magnetic Sensor integrated circuit is extended, integrated circuit cost can be reduced, improve reliability.

For achieving the above object, the technical scheme that the utility model is provided is as follows：

A kind of Magnetic Sensor integrated circuit, including rectification circuit, magnetic measuring sensor, signal processing unit, output control circuit And output port；

The rectification circuit is for being converted to dc source by external power source；

The magnetic measuring sensor receives constant current independent of temperature variations to perceive the polarity of external magnetic field and export Differential signal；

The signal processing unit amplifies for the differential signal that exports to the magnetic measuring sensor and goes Export after being changed to magnetic field detection signal；And,

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 outside first state for flowing out electric current and from it is outside to the output port inflow current the Run under the one of state of two-state.

Optionally, the constant current is constant current independent of temperature variations.

Optionally, the differential signal includes field signal and deviation signal, and the signal processing unit includes that first cuts Ripple is switched, for field signal and deviation signal are modulated high-frequency region and baseband frequency respectively.

Optionally, the signal processing unit also includes the first amplification module, for exporting to first chopping switch Differential signal carry out gain amplification, and the field signal solution in the differential signal that first chopping switch is exported be transferred to it is low Export behind frequency domain.

Optionally, the signal processing unit also includes switch-capacitor filtering module for for amplifying mould to described first The differential signal of block output is sampled, and sampled signal is carried out to export after deviation elimination is amplified with gain.

Optionally, the signal processing unit also includes converter for the difference that exports the switch-capacitor filtering module Sub-signal is exported to the output control circuit after being converted to the magnetic field detection signal.

Optionally, also first clock signal is exported to described first for the time schedule controller including time schedule controller Chopping switch and the first amplification module, export second clock signal to the switch-capacitor filtering module, and, during output the 3rd Clock signal is to the converter；Wherein, the second clock signal is than first scheduled time of the first clock signal delay, institute Second clock signal is stated than second scheduled time of the 3rd clock signal delay.

Optionally, first amplification module includes the first amplifier, the second chopping switch and the second amplifier；

First amplifier and the second amplifier carry out gain amplification for the signal to being input into, and second copped wave is opened Close low frequency region is transferred to for the field signal solution in the differential signal that exports first chopping switch.

Optionally, the switch-capacitor filtering module includes：

First switch capacitive filter, second switch capacitive filter, the 3rd SCF and the 4th switch electricity Capacitor filter device；

The first switch capacitive filter and second switch wave filter are for the difference that exports to first amplification module The upper half cycle of sub-signal carries out being sampled as the first sampled signal, the 3rd SCF and the 4th switch filter The lower half cycle of the differential signal for exporting to first amplification module carries out being sampled as the second sampled signal.

Optionally, the switch-capacitor filtering module also includes adder, for by first sampled signal and second Sampled signal is after phase add mode carries out deviation elimination and gain is amplified.

Optionally, the signal processing unit also includes the second amplification module, for amplifying the difference of the adder output Sub-signal.

Optionally, first amplification module, the adder and the gain amplifier of second amplification module are 800- 2000。

Optionally, the converter includes first comparator, the second comparator and latching logic circuit；Wherein, described One comparator and the second comparator connect a pair of difference of a pair of differential reference voltages and second amplification module output respectively This pair of differential reference voltage reversal connection of signal, first comparator and the second comparator；

Wherein, the first comparator be configured to export second amplification module output voltage signal it is higher with one The magnetic field intensity of the comparative result of threshold value or the external magnetic field and the comparative result of predetermined work point, the second comparator are configured Voltage signal to export the second amplification module output is strong with the comparative result of a lower threshold or the magnetic field of external magnetic field Spend the comparative result with predetermined point of release；The comparative result that the latching logic circuit is configured to first comparator is to represent institute The voltage signal for stating the output of the second amplification module reaches predetermined work point more than the magnetic field intensity of the higher thresholds or external magnetic field When make the converter export the first level, when the comparative result of the second comparator represents the second amplification module output When voltage signal is not up to predetermined point of release less than the magnetic field intensity of the lower threshold or external magnetic field, the converter output is made The second electrical level contrary 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 converter is made to keep former output state constant.

Optionally, the output control circuit includes first switch and second switch, the first switch and the output Port is connected in the first current path, and the second switch is connected to and the first current path side with the output port To the second contrary current path, the first switch and second switch under the control of the magnetic field detection signal optionally Conducting.

Optionally, the output control circuit includes being connected between the magnetic field detection circuit and the output port Switch, the magnetic field detection signal of the magnetic field detection circuit output control the switch so that electric current from the output port to Outer outflow is flowed inward into from the output port.

Optionally, the switches switching frequency of the magnetic field detection signal is proportional to the frequency of the AC power or is equal to The twice of the frequency of the AC power.

Accordingly, the utility model additionally provides a kind of electric machine assembly, including the motor powered by an AC power；And Above-mentioned Magnetic Sensor integrated circuit.

Accordingly, the utility model additionally provides the application apparatus including the electric machine assembly.

Optionally, the application apparatus is pump, fan, household electrical appliance or vehicle.

Compared to prior art, the technical scheme that the utility model is provided at least has advantages below：

The utility model provide a kind of Magnetic Sensor integrated circuit, electric machine assembly and household electrical appliance, including rectification circuit, Magnetic measuring sensor, signal processing unit, output control circuit and output port；The rectification circuit is for external power source is converted to Dc source；The magnetic measuring sensor receives constant current independent of temperature variations to perceive the polarity of external magnetic field and export Differential signal；The signal processing unit amplifies for the differential signal that exports to the magnetic measuring sensor and goes Export after being changed to magnetic field detection signal；And the output control circuit is used at least be based on the magnetic field detection signal, makes described Magnetic Sensor integrated circuit at least from the output port to the outside first state for flowing out electric current and from outside to described defeated Run under the one of state of second state of exit port inflow current.The technical scheme that the utility model is provided, by existing The function of some Magnetic Sensor integrated circuits is extended, and can reduce integrated circuit cost, improves reliability.

Description of the drawings

In order to be illustrated more clearly that the utility model embodiment or technical scheme of the prior art, below will be to embodiment Or accompanying drawing to be used is briefly described needed for description of the prior art, it should be apparent that, drawings in the following description are only It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also Other accompanying drawings can be obtained according to the accompanying drawing for providing.

A kind of structural representation of Magnetic Sensor integrated circuit that Fig. 1 is provided for the embodiment of the present application；

A kind of structural representation of rectification circuit that Fig. 2 is provided for the embodiment of the present application；

The structural representation of another kind of Magnetic Sensor integrated circuit that Fig. 3 is provided for the embodiment of the present application；

A kind of signal schematic representation of time schedule controller that Fig. 4 is provided for the embodiment of the present application

A kind of magnetic measuring sensor and the structural representation of the first chopping switch that Fig. 5 a are provided for the embodiment of the present application；

Sequential charts of Fig. 5 b for tetra- sub-clock signals of Fig. 5 a；

Fig. 5 c are the signal control schematic diagram of discharge switch and the first chopping switch in Fig. 5 a；

Fig. 5 d are the signal schematic representation shown in Fig. 5 a in circuit；

A kind of structural representation of first amplification module that Fig. 6 is provided for the embodiment of the present application；

A kind of structural representation of switch-capacitor filtering module that Fig. 7 a are provided for the embodiment of the present application；

A kind of structural representation of adder that Fig. 7 b are provided for the embodiment of the present application；

A kind of structural representation of converter that Fig. 8 is provided for the embodiment of the present application；

A kind of principle schematic of judgement polarity of the magnetic field that Fig. 9 is provided for the embodiment of the present application；

Each signal output schematic diagram under a kind of cycle clock signal that Figure 10 is provided for the embodiment of the present application；

The circuit diagram of the output control circuit that Figure 11 is provided for the embodiment of the present application；

The circuit diagram of another output control circuit that Figure 12 is provided for the embodiment of the present application；

The circuit diagram of another output control circuit that Figure 13 is provided for the embodiment of the present application；

The circuit diagram of another output control circuit that Figure 13 a are provided for the utility model embodiment；

The electrical block diagram of the electric machine assembly that Figure 14 is provided for the embodiment of the present application；

The structural representation of the synchronous motor that Figure 15 is provided for the embodiment of the present application.

Specific embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only the utility model a part of embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment for being obtained, belongs to the scope of the utility model protection.

As described in background, in prior art, Magnetic Sensor integrated circuit is typically only capable to export field detection result, Also need to additionally arrange peripheral circuit during specific works, the field detection result is processed, therefore integrated circuit cost Higher, reliability is poor.

Based on this, the embodiment of the present application provides a kind of Magnetic Sensor integrated circuit, electric machine assembly and household electrical appliance, passes through The function of existing Magnetic Sensor integrated circuit is extended, integrated circuit cost can be reduced, improve reliability.To realize Above-mentioned purpose, the technical scheme that the embodiment of the present application is provided are as follows, specifically with reference to shown in Fig. 1 to Figure 15, to the embodiment of the present application The technical scheme of offer is described in detail.

With reference to shown in Fig. 1, a kind of structural representation of the Magnetic Sensor integrated circuit provided for the embodiment of the present application, its In, Magnetic Sensor integrated circuit includes：

Input port, rectification circuit 100, magnetic measuring sensor 200, signal processing unit 300, output control circuit 400 and defeated Exit port 2；

The rectification circuit 100 is for being converted to dc source by external power source；

The magnetic measuring sensor 200 receives constant current independent of temperature variations to perceive the polarity of external magnetic field defeated Go out differential signal；

The signal processing unit 300 is for putting to the differential signal of 200 magnetic field detection signal output of the magnetic measuring sensor Export after being converted to greatly and after going deviation processing magnetic field detection signal；And,

The output control circuit 400 is used at least be based on the magnetic field detection signal, makes the integrated electricity of the Magnetic Sensor Road is at least from the output port 2 is to the outside first state for flowing out electric current and outside flows into electricity to the output port 2 certainly Run under the one of state of second state of stream.In the present embodiment, the differential signal includes that field signal is believed with deviation Number.

Wherein, the input port that the embodiment of the present application is provided provides external power source for rectification circuit, and input port can be with Including the first input port 11 and the second input port 12 of connection external power source.In the embodiment of the present application, input port connects The situation that external power source had both included that input port was directly connected to external power source is connect, it is also indirect with external power source including input port The situation of connection, is not particularly limited to this in this application, and needs carry out specific design according to practical application.Wherein, at this The external power source that rectification circuit is received in application embodiment is AC power.In addition, Magnetic Sensor receive not receive temperature change The constant current of impact can be provided by rectification circuit, and this application is not particularly limited.

In a 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 converted to direct current for the AC signal for exporting AC power Signal, and voltage regulation unit is stable in values for the direct current signal that exports full-wave rectification bridge.May be referred to Fig. 2 institutes Show, a kind of structural representation of the rectification circuit provided for the embodiment of the present application, wherein, full-wave rectification bridge 110 includes：Series connection First diode 111 and the 3rd diode 113 and the 4th diode 114 of the second diode 112 and series connection；Described 1st The common port of pole pipe 111 and second diode 112 is electrically connected with the VAC+ of AC power for first input port 11；It is described The common port of the 3rd diode 113 and the 4th diode 114 is that the second input port 12 is electrically connected with the VAC- of AC power Connect.

Wherein, the input of first diode 111 is electrically connected to form with the input of the 3rd diode 113 entirely First output end V1 of ripple rectifier bridge 110, the output of the output end of second diode 113 and the 4th diode 114 End is electrically connected to form the second output end V2 of full-wave rectification bridge 110.The direct current of the second output end V2 output 16V or so Pressure.Preferably, the output control circuit 30 by the full-wave rectification bridge 110 the second output end V2 DC-voltage supply.

And, voltage regulation unit 120 includes being connected between the first output end of full-wave rectification bridge 110 and the second output end 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 the 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 first end of the negative electrode and first resistor 122 of the first Zener diode 121 are all connected with the second output of full-wave rectification bridge 110 End, the first end and the first end of transistor 125 of the second end connection second resistance 123 of first resistor 122, second resistance 123 The second end connection transistor 125 grid and the second Zener diode 124 negative electrode, wherein, the second end of transistor 125 and The anode of the second Zener diode 124 two output ends respectively as 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.

With reference to shown in Fig. 1, the signal processing unit 300 that the embodiment of the present application is provided includes that be sequentially connected first cuts Ripple switchs the 301, first amplification module 302, switch-capacitor filtering module 303 and signal processing unit 300, the first chopping switch 301 are connected with magnetic measuring sensor 200.

Wherein, first copped wave opens 301 passes for the magnetic in the differential signal that exports 200 magnetic field of the magnetic measuring sensor Field signal modulates high-frequency region and baseband frequency respectively with deviation；

First amplification module 302 is put for carrying out gain to the differential signal that first chopping switch 301 is exported Greatly, magnetic field and by first chopping switch export differential signal in field signal solution is transferred to base band respectively with deviation signal Export after frequency and high-frequency region；

The switch-capacitor filtering module 303 is for adopting to the differential signal that first amplification module 302 is exported Sample, and export after the differential signal obtained after carrying out deviation elimination to sampled signal carries out gain amplification；

The converter 304 is for being converted to the magnetic by the differential signal that the switch-capacitor filtering module 303 is exported Export to the output control circuit 400 after the detection signal of field.In the present embodiment, the converter is analog-to-digital conversion mould Block.

Additionally, in order to ensure that Magnetic Sensor integrated circuit preferably runs, with reference to shown in Fig. 3, being that the embodiment of the present application is carried For another kind of Magnetic Sensor integrated circuit structural representation, wherein, Magnetic Sensor integrated circuit also include time schedule controller 500, the first clock signal is exported to first chopping switch 301 and the first amplification module for the time schedule controller 500 302, second clock signal is exported to the switch-capacitor filtering module 303, and, the 3rd clock signal of output is to the signal Processing unit 300；Wherein, the second clock signal is than first scheduled time of the first clock signal delay, and described second Clock signal is more predetermined more than described second than second scheduled time of the 3rd clock signal delay, and first scheduled time Time.The frequency of first clock signal is the chopping frequency of first chopping switch 301, the second clock signal Frequency be the switch-capacitor filtering module 303 sample frequency.

Wherein, in order to ensure the accuracy of output signal, the first clock signal, second clock signal and the 3rd clock signal Between there is certain delay.Optionally, first scheduled time that the embodiment of the present application is provided is first clock signal 1/4 cycle.And, second scheduled time was 5 nanoseconds.Also, the first clock letter that the embodiment of the present application is provided Number, the frequency of second clock signal and the 3rd clock signal it is identical.Wherein, shown in optional reference Fig. 4, it is that the embodiment of the present application is carried For a kind of time schedule controller signal schematic representation, it should be noted that in figure the first clock signal to the 3rd clock signal is only Only it is to represent that (that is, optional first scheduled time is first clock letter for priority sequential relationship between three signals Number 1/4 cycle, and, the second clock signal is than 5 nanosecond of the 3rd clock signal delay) and frequency relation (that is, institute The frequency for stating the first clock signal, second clock signal and the 3rd clock signal is identical), the embodiment of the present application offer is not provided Magnetic Sensor work when actual signal.

In the embodiment of the present application, field signal and deviation signal, magnetic field are included in magnetic measuring sensor output difference signal Signal is the preferable field voltage signal matched with external magnetic field that magnetic measuring sensor is detected, and deviation signal is magnetic measuring sensor Inherent variability.Wherein, the preferable field voltage signal of magnetic measuring sensor output is very little, generally there was only several millivolts of zero point, and inclined Difference signal is then close to 10 millivolts, thus the later stage need to eliminate deviation signal, and high-gain etc. is carried out to preferable field voltage signal Process.

Process to Magnetic Sensor output difference signal, is adjusted to high frequency to its field signal by the first chopping switch first Regional processing, wherein, as shown in figure 3, control of first chopping switch 301 according to the time schedule controller 500, will be described Field signal modulation in 200 output difference signal of magnetic measuring sensor is to high-frequency region by deviation signal modulation to baseband frequency.Compared with Good, the high-frequency region frequency is more than 100K hertz, and the baseband frequency is less than 200 hertz.

Specifically with reference to shown in Fig. 5 a to Fig. 5 d, a kind of magnetic measuring sensor and the first copped wave that Fig. 5 a are provided for the embodiment of the present application The structural representation of switch, sequential charts of Fig. 5 b for tetra- sub-clock signals of Fig. 5 a, and, Fig. 5 c are Fig. 5 a discharge switches and the The signal control schematic diagram of one chopping switch.

Wherein, the magnetic measuring sensor 200 includes four contact terminals, wherein, magnetic measuring sensor 200 includes for being oppositely arranged One terminal A and third terminal C, and Second terminal B that is oppositely arranged and forth terminal D；In the embodiment of the present application, magnetic strength is surveyed Device 200 is Hall pole plate, and magnetic measuring sensor 200 is driven by the first power supply 13, and the first power supply 13 can be carried for rectification circuit 100 For.In the present embodiment, the power supply 13 is constant-current source independent of temperature variations.

First chopping switch 301 includes eight switches of K1 to K8 in Fig. 5 a, is connected between four contact terminals, its In, the first chopping switch 301 includes be respectively connecting to the first power supply 13 between the first terminal A and Second terminal B One switch K1 and second switch K2, the 3rd earth terminal GND is respectively connecting between third terminal C and forth terminal D The switch K4 of switch K3 and the 4th, the first output end P is connected to the 6th switch of third terminal C and forth terminal D respectively The switch K5 of K6 and the 5th, and, the second output end N is connected to the 7th switch of Second terminal B and the first terminal A respectively The switch K8 of K7 and the 8th.Wherein, first clock signal includes the first sub-clock signal CK2B, the second sub-clock signal CK1B, the 3rd sub-clock signal CK2 and the 4th sub-clock signal CK1, first switch K1 and second switch K2 receive institute respectively The first sub-clock signal CK2B and the second sub-clock signal CK1B controls are stated, the 3rd switch K3 and the 4th switch K4 are received respectively 3rd sub-clock signal CK2 and the 4th sub-clock signal CK1 controls, the 5th switch K5 and the 6th switch K6 are respectively by described 3rd sub-clock signal CK2 and the 4th sub-clock signal CK1 controls, the 7th switch K7 and the 8th switch K8 are respectively by described 3rd sub-clock signal 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 conversely, the second sub-clock signal CK1B and Four sub-clock signal CK1 are conversely, and the 3rd sub-clock signal CK2 and the 4th sub-clock signal CK1 is non-overlapping sub-clock Signal.

Wherein, turn on the first power supply 13 in the first terminal A, and when third terminal C and earth terminal GND conductings, the second end Sub- B and the conducting of the second output end N, forth terminal D and the conducting of the first output end P；Turn on the first power supply 13 in Second terminal B, And forth terminal D and earth terminal GND, when turning on, the first terminal A is turned on the second output end N, third terminal C and the first output end P is turned on.Wherein, it is P1 and N1 that the first output end P and the second output end N export a differential signal.

Additionally, in addition to above-mentioned magnetic measuring sensor 200 and the first chopping switch 301, Magnetic Sensor also includes being 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 known before signal output part for magnetic strength for power input, Second terminal B and forth terminal D, Second discharge line 15 is turned on；When the first terminal A and third terminal C know signal output part, Second terminal B and the 4th end for magnetic strength Before sub- D is power input, the first discharge line 14 is turned 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 receive the first sub-clock signal CK2B and institute respectively State the control of the second sub-clock signal CK1B；Second discharge line 15 includes the 3rd discharge switch S3 and the 4th electric discharge connected Switch S4, the 3rd discharge switch S3 and the 4th discharge switch S4 receive the first sub-clock signal CK2B and described the respectively The control of two sub-clock signal CK1B.

When the first terminal A and third terminal C are power input, 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 is simultaneously turned on；As the first terminal A and described Third terminal C for magnetic strength to know signal output part, Second terminal B and forth terminal D be power input when, 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 State the 4th discharge switch S4 to simultaneously turn on.

As shown in Figure 5 b, 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 conversely, CK2 is contrary with CK2B.The overlapping sub-clock signal CK1B and CK2B is overlapping Time period between the dotted line of period, i.e., two, it is high level.Above-mentioned two non-overlapping sub-clock signal CK1 and CK2, 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 301 includes, and four that discharge line includes Discharge switch can be transistor switch.Further, with reference to shown in Fig. 5 c, when CK1 is high level, CK2B is high electricity Flat, CK2 and CK1B is low level, now Second terminal B and forth terminal D to be respectively turned on the first power supply and ground connection End GND, is power input, and the switch conduction between third terminal C and first output end P, the first end Switch conduction between sub- A and second output end N, then the first terminal A and third terminal C are magnetic perceptual signal Output end.CK1 just from high level be changed into low level after a bit of time in, i.e. in Fig. 5 b between first group of two dotted line Time period, is the overlapping phase of two overlapping sub-clock signal CK1B and CK2B, and during this, CK1B and CK2B are high level, described The 3rd discharge switch S3 and the 4th discharge switch S4 between Second terminal B and forth terminal D is both turned on, and described Short circuit between two-terminal B and forth terminal D, eliminates what the parasitic capacitance between Second terminal B and forth terminal D was stored Electric charge.Hereafter, when CK1 is low level, CK2B is low level, and CK2 and CK1B is high level, now the first terminal A and Third terminal C to be respectively turned on the first power supply and earth terminal GND, is power input, and Second terminal B with it is described Switch conduction between first output end P, the switch conduction between forth terminal D and second output end N are then described Second terminal B and forth terminal D know signal output part for magnetic strength.CK1 just from low level be changed into high level before it is one little In the section time, i.e. the time period in Fig. 5 b between second group of two dotted line, is the overlapping of two sub-clock signals CK1B and CK2B Phase, during this, CK1B and CK2B are high level, first electric discharge between the first terminal A and third terminal C Switch S1 and the second discharge switch S2 is both turned on, and between the first terminal A and third terminal C, short circuit, eliminates first The electric charge of the parasitic capacitance storage between terminal A and third terminal C.

Fig. 5 d are the signal schematic representation in circuit shown in Fig. 5 a.Wherein, CK is clock signal；Vos is magnetic measuring sensor 200 Deviation voltage signal, the physical property of Hall Plate 200 are determined, it can be assumed that its any moment in clock signal period is all Keep constant.Vin and-Vin are first half cycle and later half cycle output of the first chopping switch output in clock signal CK The preferable output of preferable field voltage signal, i.e. 200 unbiased difference signal of Hall Plate interference.As previously described, in clock signal CK A half period, binding post A and C respectively with the first power supply and ground conducting, binding post B and D as output end turn on； When another half period the binding post B and D of clock signal CK is turned on the first power supply and ground respectively, binding post A and C conduct Output end is turned 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 It is little equal, it is in opposite direction.Vout is the output signal of the first chopping switch, is deviation signal Vos and preferable field signal Vin Superposition.Through the first chopping switch, above-mentioned field signal modulation is to high-frequency region.

In a kind of embodiment of the application, the preferable field voltage signal of the output of the magnetic measuring sensor 200 is very little, Generally 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 letter Number carry out high-gain process.

As shown in figure 3, control of the first amplification module 302 of the embodiment of the present application offer according to time schedule controller 500, right The differential signal of the output of the first chopping switch 301 carries out magnetic in gain amplification, and the differential signal that the first chopper 301 is exported Field signal is exported after being demodulated to low frequency region.In the above-mentioned any one embodiment of the utility model, to the magnetic measuring sensor 200 Sensitivity requirements are higher, and the field signal of the output of magnetic measuring sensor 200 can be very little, for example, may there was only several millivolts of zero point, therefore Need to amplify which accordingly, this requires the yield value that the first amplifier 302 has a comparison high, by the magnetic The field signal of sensor 200 amplifies as far as possible, is easy to subsequently process which accordingly, and optionally, described first amplifies The gain of module is 100.

In a specific embodiment of the application, the first amplification module 302 can be the chopper amplification mould shown in Fig. 6 Block, i.e. first amplification module includes the first amplifier A1, the second chopping switch Z2 and the second amplifier being sequentially connected A2；The first amplifier A1 and the second amplifier A2 carries out gain amplification for the signal to being input into, and second copped wave is opened Close Z2 low frequency region is transferred to for the field signal solution in the differential signal that exports first chopping switch 301.Wherein, One amplifier A1 is collapsible amplifier, and the second amplifier A2 can be one-stage amplifier.

Wherein, with reference to shown in Fig. 3, integrated circuit is, and the first amplifier A1 and the second amplifier A2 is for input Signal carry out gain amplification, the second chopping switch Z2 under the control of first clock signal by described first Field signal solution in the differential signal of the output of chopping switch 202 is transferred to low frequency region.

Wherein, in the embodiment of the present application, the first amplifier A1 accesses a pair of differential signals of the output of the first chopping switch 301 P1 and N1, and the output of the first amplifier A1 is also a pair of differential signals；Second chopping switch Z2 is configured in each clock The first half cycle in cycle directly exports this pair of differential signal, and will be this pair of differential signal mutual in the later half cycle of each clock cycle Export after changing, a pair of output signals for defining the second chopping switch Z2 are expressed as P2 and N2.

As shown in figure 3, after early stage signal transacting, the switch-capacitor filtering module 303 that the embodiment of the present application is provided According to the control of time schedule controller 500, the differential signal of first amplification module 302 output is sampled, and to sampling letter The differential signal obtained after number carrying out deviation elimination is exported after carrying out gain amplification.Optionally, it is described in the embodiment of the present application The sample frequency of switch-capacitor filtering module is identical with the chopping frequency of first chopping switch, i.e., time schedule controller is exported First clock signal is identical with the frequency of second clock signal.The differential signal of first amplification module 302 output includes the One sub- differential signal and the second sub- differential signal.

In a specific embodiment of the application, switch-capacitor filtering module can be the switching capacity filter shown in Fig. 7 Ripple module, wherein, the switch-capacitor filtering module includes：First switch capacitive filter SCF1, second switch capacitor filtering Device SCF2, the 3rd SCF SCF3 and the 4th SCF SCF4.Wherein, the first switch electric capacity filter The upper half cycle of the differential signal of ripple device and second switch wave filter for exporting to first amplification module is sampled as First sampled signal, the 3rd SCF and the 4th switch filter are for first amplification module output Lower half cycle of differential signal carry out being sampled as the second sampled signal.

Specifically, the first switch capacitive filter SCF1 and second switch wave filter SCF2 is for putting to described first The upper half cycle of first, second sub- differential signal of the big output of module 302 carries out being sampled as first, second sub-sampled signals, institute State the 3rd SCF SCF3 and the 4th switch filter SCF4 for first amplification module 302 is exported First, the lower half cycle of the second sub- differential signal carry out being sampled as the three, the 4th sub-sampled signals.

Wherein, first switch capacitive filter SCF1 and second switch capacitive filter SCF2 respectively to differential signal P2 and The upper half cycle of N2 carries out first, second sub-sampled signals for being sampled as P2A and N2A, and the 3rd SCF SCF3 Respectively the lower half cycle of differential signal P2 and N2 is carried out being adopted as the of P2B and N2B with the 4th SCF SCF4 3rd, the 4th sub-sampled signals.

Then, can be disappeared by carrying out deviation by phase add mode to the first sub-sampled signals and the 3rd sub-sampled signals Remove, by carrying out deviation elimination by phase add mode to the second sub-sampled signals and the 4th sub-sampled signals.With specific reference to Fig. 7 a Shown, the switch-capacitor filtering module also includes adder 303b, for first sampled signal and the second sampling are believed Number differential signal obtained after phase add mode carries out deviation elimination carries out gain amplification；Specifically, adder 303b is by institute State the first sub-sampled signals P2A and deviation elimination is carried out with the 3rd sub-sampled signals P2B phase add mode, and, the second son is adopted , after phase add mode carries out deviation elimination, the differential signal for obtaining carries out gain for sample signal N2A and the 4th sub-sampled signals N2B Amplify, wherein, a pair of differential signals for defining adder output are P3 and N3.Optionally, what the embodiment of the present application was provided is described Adder is trsanscondutance amplifier, and the gain of the trsanscondutance amplifier is 2.

With reference to shown in Fig. 7 b, a kind of structural representation of the adder provided for the embodiment of the present application, adder include 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 end concatenation operation amplifier A ' of the metal-oxide-semiconductor, the grid of another metal-oxide-semiconductor access sampled signal N2A and are somebody's turn to do The end of oppisite phase of the output end concatenation operation amplifier A ' of metal-oxide-semiconductor；The grid of one metal-oxide-semiconductor of second voltage current converter M2 is accessed The in-phase end of the output end concatenation operation amplifier A ' of sampled signal P2B and the metal-oxide-semiconductor, the grid of another metal-oxide-semiconductor access sampling The end of oppisite phase of the output end concatenation operation amplifier A ' of signal N2B and the metal-oxide-semiconductor；And the one of tertiary voltage current converter M3 The grid of metal-oxide-semiconductor accesses operational amplifier A ' the output end concatenation operation amplifier A ' of the differential signal N3 that exports and the metal-oxide-semiconductor In-phase end, and the grid of another metal-oxide-semiconductor accesses operational amplifier A ' output end of the differential signal P3 that exports and the metal-oxide-semiconductor The end of oppisite phase of concatenation operation amplifier A '.Wherein, the employing signal of input is converted to electricity by the voltage current adapter of adder Deviation is eliminated by phase add mode after stream, and is exported Jing after its op-amp gain amplifies.Wherein, the preferably adder Input arranges source feedback resistance, to ensure that metal-oxide-semiconductor is in saturation region in voltage current adapter.That is, with reference to shown in Fig. 7 b, Connect series resistance R ' in each voltage current adapter between two metal-oxide-semiconductor source electrodes, to ensure voltage current adapter Middle metal-oxide-semiconductor is in saturation region.

Further, the signal processing unit also includes the second amplification module 305, and the second amplification module 305 is connected to Between switch-capacitor filtering module 303 and converter 304, for amplifying the differential signal of adder output described in Jing, and second Differential signal P3, N3 after amplification module output amplification.In the present embodiment, second amplification module is programmable-gain Amplifier, and the gain of second amplification module is 5.

In the present embodiment, described in the field voltage signal Jing, the first amplification module, adder and second amplify mould Block gain amplifier is preferably 800-2000, and preferably 1000.In other embodiments, can by by the first amplification module, plus Musical instruments used in a Buddhist or Taoist mass and the second amplification module are set to different gains field voltage signal is amplified to required gain.

As shown in figure 3, after switch-capacitor filtering module and the second amplification module process signal, needing to pass through Differential signal is converted to magnetic field detection signal by signal processing unit 300, in order to controlled output control circuit.Wherein, refer to Shown in Fig. 8, a kind of structural representation of the converter provided for the embodiment of the present application, wherein, the converter includes：

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

Wherein, with reference to shown in Fig. 9, first comparator C1 is configured to the electricity for exporting the second amplification module output The magnetic field intensity of the comparative result or the external magnetic field of pressure signal and higher thresholds Rh is tied with the comparison of predetermined work point Bop Really, the second comparator C2 is configured to the comparison of the voltage signal and lower threshold Rl for exporting the second amplification module output As a result or external magnetic field magnetic field intensity and predetermined point of release Brp comparative result；

The comparative result that the latching logic circuit S is configured to 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 expressions 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 less than should be compared with The magnetic field intensity of Low threshold Rl or external magnetic field be not up to predetermined point of release Brp when, make the signal processing unit 300 export with The contrary second electrical level of first level (low level), represents external magnetic field for another kind of magnetic polarity；

When the comparative result of first comparator C1 and the second comparator C2 represents the second amplification module output Voltage signal is between 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 made to keep former output state constant.

3rd clock signal one described in the second clock signal delay that time schedule controller exports to the latching logic circuit S Second scheduled time, such as 5 nanoseconds, so as to avoid the switch switching point of the SCF.With reference to Figure 10 to the application The signal processing of the signal processing unit that embodiment is provided is further described.Wherein, Figure 10 left sides illustrate each module Each differential signal output under cycle clock signal, the right is corresponding signal frequency domain schematic diagram.

From it is presented hereinbefore to content knowable to, output signal Vout of the first chopping switch is deviation signal Vos and ideal The superposition of field signal Vin, while equal to the difference of differential signal P1 and N1, differential signal P1 and N1 is equal in magnitude, direction phase Instead.Understand in former and later two half periods of clock signal CK1 according to previously mentioned, the preferable magnetic field electricity of the first chopping switch output Pressure signal magnitude is equal, in opposite direction.Illustrate with reference to Figure 10 left sides, signal P1 in clock signal, use respectively by former and later two half periods P1A and P1B represent that signal N1 was represented with N1A and N1B respectively in former and later two half periods of clock signal, and 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 explained below, and through the first amplifier A1, second cuts The input signal of ripple switch is a pair of differential signals 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 ' uses N1A ' and N1B ' to represent in former and later two half periods of clock signal respectively.Due to described The bandwidth of one amplifier A1 is limited, and the differential signal of the first amplifier A1 outputs described in Jing is triangular wave differential signal, Xia Shugong Formula is only signal form, and 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 multiplication factor of the first amplifier, and Voff is the deviation in the output signal of the first amplifier, is equal to The deviation sum of the droop Vos and the first amplifier of magnetic measuring sensor 200, as the band of the first amplifier A1 is extended the deadline System, deviation Voff are changes.For ease of understanding, the coefficient of differential signal and putting for amplifier in explained below, are omitted Big coefficient.

Then after switch-capacitor filtering module：

Second chopping switch Z2 be configured to the first half cycle in each clock cycle directly export this pair of differential signal and This pair of differential signal is exchanged into output, a pair of differential output signals of the second chopping switch in the later half cycle of each clock cycle It is expressed as P2 and N2.Signal P2 represents with P2A and P2B respectively that in former and later two half periods of clock signal signal N2 is believed in clock Number former and later two half periods represent that its output is respectively respectively with N2A and N2B：

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

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

Four SCFs in switch-capacitor filtering module 304 are for each letter in differential signal P2 and N2 Number, gathered data it is divided into two-way sampled signal and each exports within former and later two half periods of each clock cycle respectively, i.e., Switch-capacitor filtering module gathers two pairs of sampled signals：A pair is P2A and P2B, another to being N2A and N2B.

The above-mentioned four road signals obtained through sampling export P3 and N3 through the adder；Adder is sampled to two pairs Signal carries out addition process respectively, and 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 in output signal P3 and N3 of adder, there was only amplified preferable field voltage signal, deviation letter Number it is eliminated.

Additionally, the Magnetic Sensor that the embodiment of the present application is provided also includes counter 306, counter 306 is connected with converter 304 Connect, the counter is for, after counting Preset Time, the magnetic field detection signal that the converter 304 is exported (i.e. believe by difference Number) output, magnetic field detection signal is exported afterwards by the 306 count delay regular hour of counter (such as 50 microseconds), it is ensured that overall Circuit has enough response times.

On the basis of above-described embodiment, in one embodiment of the application, the output control circuit 400 includes One switch and second switch, the first switch are connected in the first current path with the output port, the second switch Second current path in opposite direction with first current path, the first switch and are connected to the output port Two switches are selectively turned under the control of the magnetic field detection signal.Optionally, the first switch is diode, described Second switch is diode or triode, and the utility model is not limited to this, depended on the circumstances.

The output control circuit 400 is used at least be based on the differential signal, makes the Magnetic Sensor integrated circuit extremely It is few in the first state that electric current is flowed out from the output port 2 to outside and certainly outside to 2 inflow current of the output port Run under the one of state of second state.Second output end of the output control circuit 400 by the full-wave rectification bridge 110 The DC-voltage supply of V2.Specifically, can be from the output port 2 to the outside first state for flowing out load current, Can, from outside the second state that load current is flowed into the output port 2, can also be above-mentioned first state and second State alternate run.Thus, in another embodiment of the utility model, the output control circuit 400 further can quilt It is configured to：When the integrated circuit conforms to a predetermined condition in response to a control signal, from the output port 2 to outside stream Go out the first state of load current and from outside the second state at least one of which that load current is flowed into the output port 2 Run under state, transport in the case where the third state of the first state and the second state is prevented when the predetermined condition is not met OK.In one preferably 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 3rd shape of the output control circuit 400 The Status Type of state can be voluntarily configured according to user's request, as long as the output control circuit 400 can be prevented to enter first State and the second state, for example, believe to the magnetic field induction when the output control circuit 400 operates in the third state Number without response (can be understood as obtain less than the magnetic field induction signal) or the electric current of the output port 2 is made much smaller than described Load current (a quarter of e.g., less than described load current, now the electric current substantially may be used relative to the load current To 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 rise for specific voltage in Magnetic Sensor integrated circuit and reach the trigger generated during predetermined threshold, wherein, at signal The supply voltage of reason unit.Specifically, in a third condition, the counter 207 starts meter after predetermined trigger signal is obtained After Shi Suoshu scheduled durations, as described in 50 microseconds, output control circuit 400 enters the first or second state.

Specifically, in one embodiment of the application, as shown in figure 11, the first switch 401 and second switch 402 For the semiconductor switch of a pair of complementations.The first switch 401 is turned on for low level, and the second switch 402 is led for high level It is logical, wherein, the first switch 401 is connected in the first current path with the output port 2, the second switch 402 with The output port 2 is connected in the second current path, 402 two switches of the first switch 401 and the second switch Control end is all connected with signal processing unit 300, and the current input terminal of first switch 401 connects high voltage (such as dc source), Current output terminal is connected with the current input terminal of second switch 402, and the current output terminal of second switch 402 connects low voltage (example Such as earth terminal).If the magnetic field detection signal of Magnetic Sensor output represents it is low level, first switch 401 is turned on, and second opens Close 402 to disconnect, load current is flowed outwardly from high voltage Jing first switches 401 and output port 2, if the signal transacting list The magnetic field detection signal of 300 output of unit is expressed as high level, and second switch 402 is turned on, and first switch 401 disconnects, load current Flow into output port 2 and flow through second switch 402 from outside.In the example of Figure 11, first switch 401 is aoxidized for positive channel metal Thing semiconductor field effect transistor (p-type MOSFET), second switch 402 are negative channel mos field effect transistor Pipe (N-type MOSFET).It is understood that in other embodiments, first switch and second switch can also be other types Semiconductor switch, can for example be junction field effect transistor (JFET) or metal semiconductor field effect transis (MESFET) etc. its His field-effect transistor.

In another embodiment of the application, as shown in figure 12, the first switch 401 is the switch of high level conducting Pipe, the second switch 402 is one-way conduction diode, and the negative electrode of the control end and second switch 402 of first switch 401 connects The output end of the converter of signal processing unit 300.The current input terminal of first switch 401 connects the output of rectification circuit, the The anode of the current output terminal and second switch 402 of one switch 401 is all connected with output port 2.Wherein, the first switch 401 are connected in the first current path with the output port 2, the output port 2, the second switch 402 and the letter Number processing unit 300 is connected in the second current path, if the magnetic field detection signal of the output of the signal processing unit 300 is represented It is high level, first switch 401 is turned on, and second switch 402 disconnects, load current self-rectifying circuit Jing first switches 401 and defeated Exit port 2 is flowed outwardly, if the magnetic field detection signal of the output of the signal processing unit 300 represents it is low level, second switch 402 conductings, first switch 401 disconnect, and load current flows into output port 2 and flows through second switch 402 from outside.Can manage Solution, in the other embodiment of the application, the first switch 401 and the second switch 402 can also be other structures, this Utility model is not limited to this, is specifically depended on the circumstances.

In another embodiment of the application, the output control circuit flows outwardly electricity with from the output pin Stream the first current path, the second current path of electric current is flowed inward into from the output pin and described first is connected to Switch in current path and the one of path of the second current path, magnetic of the switch by the magnetic field detection circuit output Field detection information control so that the first current path and the second current path are selectively turned on.Optionally, first electric current leads to Switch is not set in road and the second current path other in which path.

Implement as one kind, as shown in figure 13, the output control circuit 400 includes a unidirectional conducting switch 403, Unidirectional conducting switch 403 is connected to the first current path with output port 2, and its current input terminal can connect signal processing unit 300 output end, the output end of signal processing unit 300 can also Jing resistance R1 be connected to output port 2 it is electric with described first In logical circulation road the second current path in opposite direction.Unidirectional conducting switch 403 is turned on when magnetic field induction signal is high level, is born Carry electric current Jing unidirectional conducting switch 403 and output port 2 is flowed outwardly, one-way conduction when the magnetic field induction signal is low level Switch 403 disconnects, and load current flows into output port 2 and flows through resistance R1 and signal processing unit 300 from outside.As one kind Substitute, the resistance R1 in second current path can also replace with unidirectional with 403 reverse parallel connection of unidirectional conducting switch Open up pass.So, the load current for flowing out from output port and the load current for flowing into more are balanced.

In another kind is implemented, as depicted in fig. 13 a, the output control circuit 400 includes differential concatenation in signal Electricity diode D1 and D2 between the output end and output port 2 of processing unit 300 in parallel with the diode D1 and D2 that connect The resistance R1 and resistance R2 being connected between the common port and power Vcc of diode D1 and D2, wherein, the negative electrode of diode D1 It is connected with the output end of signal processing unit 300.Diode D1 is controlled by magnetic field detection information.It is high electricity in magnetic field detection information Diode D1 cut-offs at ordinary times, load current Jing resistance R2 and diode D2 are flowed outwardly from output port Pout, the magnetic field inspection When measurement information is low level, load current flows into output port Pout and flows through resistance R1 and signal processing unit 300 from outside.

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

As shown in figure 14, 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 of the power supply of power supply 1000；The two-way admittance switch 3000 connected with the motor 2000；And according in the application State the Magnetic Sensor integrated circuit 4000 provided by any embodiment, the output port of the Magnetic Sensor integrated circuit 4000 with The control end electrical connection of the two-way admittance switch 3000.Preferably, two-way admittance switch 3000 can be that three terminal bidirectional is controllable Transwitch (TRIAC).It is appreciated that two-way admittance switch also can be realized by other kinds of suitable switch, for example, can wrap Two thyristors of reverse parallel connection are included, and corresponding control circuit is set, according to the output end of Magnetic Sensor integrated circuit Control circuit described in output signal Jing of mouth controls the two thyristors according to predetermined way.Preferably, the group of motors Part also includes reduction voltage circuit 5000, for the Magnetic Sensor integrated circuit is supplied to after the AC power 1000 is depressured 4000.Magnetic Sensor integrated circuit 4000 is installed to perceive the changes of magnetic field of rotor near the rotor of motor 2000.

On the basis of above-described embodiment, in a specific embodiment of the application, the motor is synchronous motor, can To understand, Magnetic Sensor integrated circuit of the present 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 15, the synchronous motor include stator and can relative stator rotation rotor 1001. The stator winding 1006 that stator has stator core 1002 and is 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 have permanent magnet, stator winding 1006 with exchange During power sources in series, in steady-state process with the rotating speed constant-speed operation of 60f/p circle/minutes, wherein f is the AC power to rotor 1001 Frequency, p is the number of pole-pairs of rotor.In the present embodiment, stator core 1002 has two relative pole portions 1004.Each pole portion tool There is polar arc face 1005, the outer surface of rotor 1001 is relative with polar arc face 1005, forms substantially uniform air gap between the two.The application Alleged substantially homogeneous air gap, refers to most of formation 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, except starting groove 1007 on polar arc face 1005 Part in addition is then concentric with rotor.Above-mentioned configuration can form non-uniform magnetic field, it is ensured that its pole axis S1 when static is relative for rotor Central shaft S2 in stator poles portion inclines an angle, it is allowed to which when motor is powered every time in the presence of integrated circuit, rotor can be with 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 through two pole of stator portion, 1004 center.In the present embodiment, stator and rotor are respectively provided with two Individual magnetic pole.It should be understood that in more embodiments, the number of magnetic poles of stator and rotor can also be unequal, and there are more magnetic Pole, such as four, six etc..

Preferably, the output control circuit 30 is configured in the AC power 1000 be positive half period and the magnetic Sensor detects that the magnetic field of the p-m rotor is that the first polarity or the AC power 1000 are negative half-cycle and the magnetic Sensor detects that the magnetic field of the p-m rotor is second polarity chron opposite polarity with described first, opens the two-way admittance Close 3000 to turn on.When the AC power 1000 be negative half-cycle and p-m rotor be first polarity, or the exchange Power supply 1000 is for positive half period and the p-m rotor is the second polarity chron, ends the two-way admittance switch 3000.

On the basis of above-described embodiment, in one embodiment of the application, the output control circuit 400 is configured It is positive half period and described sensor 10 detects that the magnetic field of the p-m rotor is the first pole in the AC power 1000 to be Property or the AC power 1000 be negative half-cycle and Magnetic Sensor (wherein, Magnetic Sensor include magnetic measuring sensor and and its The signal processing unit of connection) magnetic field of detecting the p-m rotor is second polarity chron opposite polarity with described first, makes Drive a current through between the output port and two-way admittance switch 3000, so as to the two-way admittance is switched 3000 conductings.When the AC power 1000 be negative half-cycle and p-m rotor be first polarity, or the alternating current Source 1000 is for positive half period and the p-m rotor is the second polarity chron, the output port is switched with the two-way admittance Between 3000, nothing drives a current through.

Preferably, the output control circuit 400 is configured to just be located in the signal of the output of the AC power 1000 The magnetic field of half period and the Magnetic Sensor detection p-m rotor is the first polarity chron, and control electric current is by the integrated circuit The two-way admittance switch 3000 is flowed to, and the signal in the output of the AC power 1000 is located at negative half-cycle and the magnetic is passed Sensor detects that the magnetic field of the p-m rotor is second polarity chron opposite polarity with described first, and control electric current is by described two-way Conducting switch 3000 flows to the integrated circuit.It is appreciated that p-m rotor is the first magnetic polarity and AC power is positive half cycle Phase, or p-m rotor, when to be the second magnetic polarity and AC power be negative half-cycle, the integrated circuit flows out or inflow current Both the situation for having electric current to flow through in the whole duration section of above-mentioned two situations had been included, also including only portion in above-mentioned two situations The situation for having electric current to flow through in time segment.

In one preferred embodiment of the application, rectification circuit 100 is adopted using the circuit shown in Fig. 2, output control circuit 400 With the circuit shown in Figure 11, the current input terminal connection full-wave rectification bridge 110 of first switch 401 in output control circuit 400 Voltage output end, the current output terminal of second switch 402 connect the ground connection output end of full-wave rectification bridge 110.Work as AC power When the signal of 1000 outputs is located at positive half period and Magnetic Sensor output low level, in output control circuit 400, first opens Pass 401 turns on and second switch 402 disconnects, and electric current flows successively through AC power 1000, motor 2000, Magnetic Sensor integrated circuit 4000 first input end, reduction voltage circuit (not shown), the second diode 112, output control electricity of full-wave rectification bridge 110 The first switch 401 on road 400, flows to two-way admittance switch 3000 from output port and returns to AC power 1000.Two-way admittance is opened After closing 3000 conductings, the series arm that reduction voltage circuit 5000 and Magnetic Sensor integrated circuit 400 are formed is shorted, Magnetic Sensor collection Stop output because of unpowered voltage into circuit 400, and TRIAC3000 is sufficiently large due to flowing through the electric current between two anode (higher than its maintenance electric current), between control pole and its first anode without driving current in the case of, TRIAC3000 still keeps leading It is logical.When the signal of the output of AC power 1000 is located at negative half-cycle and Magnetic Sensor output magnetic field detection signal represents high electricity At ordinary times, in output control circuit 400, first switch 401 disconnects and second switch 402 is turned on, and electric current is flowed from AC power 1000 Go out, output port, the second switch 402, full-wave rectification bridge of Jing output control circuits 400 are flowed into from two-way admittance switch 3000 110 the first diode 111, the first input end of Magnetic Sensor integrated circuit 4000, motor 2000 return to AC power 1000. Likewise, after TRIAC300 conductings, Magnetic Sensor integrated circuit 400 stops output short-circuit because being shorted,

TRIAC300 can then be held on.When the signal of the output of AC power 1000 is located at positive half period and magnetic sensing Device output magnetic field detection signal is expressed as high level, or the signal of the output of AC power 1000 is located at negative half-cycle and the magnetic Sensor output magnetic field detection signal is expressed as low level, first switch 401 and second switch 402 in output control circuit 400 Can not turn on, TRIAC300 cut-offs.Thus, the output control circuit 400 can be based on the change in polarity of AC power 1000 And differential signal, the integrated circuit control two-way admittance switch 3000 is cut between conducting and cut-off state in a predefined manner Change, and then control the step mode of stator winding 1006, make the variation magnetic field that stator is produced coordinate the magnetic field position of rotor, an edge Single direction drags rotor rotation, so as to when ensureing that motor is powered every time, rotor has fixed direction of rotation.

In the utility model embodiment, magnetic field detection signal is switching mode detection signal, in the steady-state process of motor, described The switches switching frequency of switching mode detection signal is equal to the twice of the frequency of the AC power.

It is appreciated that being above to retouching that the Magnetic Sensor integrated circuit of the application is made with reference to a kind of possible application State, the Magnetic Sensor that the application is provided is not limited in above-mentioned application, for example, is applied not only to Motor drive, it may also be used for other Application with magnetic field detection.

In the electric machine assembly of another embodiment of the present invention, motor can be series at external communication with two-way admittance switch Between both ends of power, it is integrated with reduction voltage circuit and Magnetic Sensor that motor switchs the first series arm for being formed of connecting with two-way admittance The second series arm that circuit is formed is in parallel.The output port of Magnetic Sensor integrated circuit is connected with two-way admittance switch, is controlled Two-way admittance switch switches between conducting and cut-off state in a predefined manner, and then controls the step mode of stator winding.

Accordingly, the embodiment of the present application additionally provides a kind of application apparatus, including the motor powered by an AC power；With The two-way admittance switch of the motor series connection；And the Magnetic Sensor integrated circuit that above-mentioned any one embodiment is provided, the magnetic The control end that the output port of sensor IC is switched with the two-way admittance is electrically connected.Optionally, the application apparatus Can in the application apparatus such as pump, fan, household electrical appliance, vehicle, the household electrical appliance can for example be washing machine, dish-washing machine, Smoke exhaust ventilator, exhaust fan etc..

The embodiment of the present application provides a kind of Magnetic Sensor integrated circuit, electric machine assembly and household electrical appliance, including rectified current Road, magnetic measuring sensor, signal processing unit, output control circuit and output port；The rectification circuit for by external power source turn It is changed to dc source；The polarity that the magnetic measuring sensor receives constant current independent of temperature variations to perceive external magnetic field is simultaneously Output difference signal；The signal processing unit amplifies for the differential signal exported to the magnetic measuring sensor and goes deviation processing After be converted to；And the output control circuit is used at least be based on the magnetic field detection signal, makes The Magnetic Sensor integrated circuit is at least to the outside first state for flowing out electric current and certainly outside to institute from the output port State.The technical scheme that the embodiment of the present application is provided, leads to Cross and the function of existing Magnetic Sensor integrated circuit is extended, integrated circuit cost can be reduced, improve reliability.

The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use that this practicality is new Type.Various modifications to these embodiments will be apparent for those skilled in the art, determined herein The General Principle of justice can be realized in the case of without departing from spirit or scope of the present utility model in other embodiments.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 (20)

1. a kind of Magnetic Sensor integrated circuit, it is characterised in that including rectification circuit, magnetic measuring sensor, signal processing unit, output Control circuit and output port；

The rectification circuit is for being converted to dc source by external power source；

The magnetic measuring sensor receives constant current driven to perceive the polarity output difference signal of external magnetic field；

The signal processing unit amplifies for the differential signal exported to the magnetic measuring sensor and goes to be converted to after deviation processing Export after magnetic field detection signal；And,

The output control circuit is used at least be based on the magnetic field detection signal, makes the Magnetic Sensor integrated circuit at least exist From the output port to the outside first state for flowing out electric current and from outside the second shape to the output port inflow current Run under the one of state of state.

2. Magnetic Sensor integrated circuit according to claim 1, it is characterised in that the rectifier receives external communication electricity External ac power source is simultaneously converted to dc source by source, and the rectifier includes full-wave rectification bridge and voltage regulation unit, the all-wave External ac power source is converted to DC voltage and is powered for the output control circuit by rectifier bridge；The voltage regulation unit will be described The DC voltage of full-wave rectification bridge output is converted to low-voltage DC, is that the signal processing unit is powered.

3. Magnetic Sensor integrated circuit according to claim 1, it is characterised in that the constant current is not for by temperature change Change the constant current for affecting.

4. Magnetic Sensor integrated circuit according to claim 1, it is characterised in that the differential signal includes field signal With deviation signal, the signal processing unit includes the first chopping switch, for field signal is modulated respectively with deviation signal To high-frequency region and baseband frequency.

5. Magnetic Sensor integrated circuit according to claim 4, it is characterised in that the signal processing unit also includes the One amplification module, for carrying out gain amplification to the differential signal that first chopping switch is exported, and by first copped wave Field signal solution in the differential signal of switch output is exported after being transferred to low frequency region.

6. Magnetic Sensor integrated circuit according to claim 5, it is characterised in that the signal processing unit also includes opening Powered-down capacitor filter module is for for sampling to the differential signal that first amplification module is exported, and sampled signal is entered Row deviation is eliminated after being amplified with gain and is exported.

7. Magnetic Sensor integrated circuit according to claim 6, it is characterised in that the signal processing unit also includes turning Parallel operation is for exporting to institute after the differential signal that the switch-capacitor filtering module is exported is converted to the magnetic field detection signal State output control circuit.

8. Magnetic Sensor integrated circuit according to claim 7, it is characterised in that also including time schedule controller, for institute State time schedule controller and the first clock signal is exported to first chopping switch and the first amplification module, export second clock signal To the switch-capacitor filtering module, and, the 3rd clock signal of output is to the converter；Wherein, the second clock letter Number than first scheduled time of the first clock signal delay, the second clock signal is than the 3rd clock signal delay Two scheduled times.

9. Magnetic Sensor integrated circuit according to claim 5, it is characterised in that first amplification module includes first Amplifier, the second chopping switch and the second amplifier；

First amplifier and the second amplifier carry out gain amplification for the signal to being input into, and second chopping switch is used Field signal solution in the differential signal for exporting first chopping switch is transferred to low frequency region.

10. Magnetic Sensor integrated circuit according to claim 6, it is characterised in that the switch-capacitor filtering module bag Include：

The filter of first switch capacitive filter, second switch capacitive filter, the 3rd SCF and the 4th switching capacity Ripple device；

The first switch capacitive filter and second switch wave filter are for the difference letter that exports to first amplification module Number the upper half cycle carry out being sampled as the first sampled signal, the 3rd SCF and the 4th switch filter are used for The lower half cycle of the differential signal of first amplification module output is carried out being sampled as the second sampled signal.

11. Magnetic Sensor integrated circuits according to claim 10, it is characterised in that the switch-capacitor filtering module is also Including adder, eliminate and carry out for first sampled signal and the second sampled signal are carried out deviation by phase add mode Gain is amplified.

12. Magnetic Sensor integrated circuits according to claim 11, it is characterised in that the signal processing unit also includes Second amplification module, for amplifying the differential signal of the adder output.

13. Magnetic Sensor integrated circuits according to claim 12, it is characterised in that first amplification module, described Adder is 800-2000 with the gain amplifier of second amplification module.

14. Magnetic Sensor integrated circuits according to claim 12, it is characterised in that the converter includes that first compares Device, the second comparator and latching logic circuit；Wherein, the first comparator and the second comparator connect a pair of difference ginsengs respectively Examine this pair of difference ginseng of a pair of differential signals of voltage and second amplification module output, first comparator and the second comparator Examine electric voltage reverse-connection；

Wherein, the first comparator is configured to the voltage signal and a higher thresholds for exporting 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 to 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 to first comparator is to represent described The voltage signal of two amplification modules output is made when reaching predetermined work point more than the magnetic field intensity of the higher thresholds or external magnetic field The converter exports the first level, when the comparative result of the second comparator is the voltage that represents the second amplification module output When signal is less than the magnetic field intensity of the lower threshold or external magnetic field and is not up to predetermined point of release, the converter output and the is made The contrary second electrical level of one level, when the comparative result of the first comparator and the second comparator represents that described second amplifies mould The voltage signal of block output is between the higher thresholds and lower threshold, or represents the magnetic field intensity of external magnetic field described When between operating point and the point of release, the output of the converter is made to keep former output state constant.

15. Magnetic Sensor integrated circuits according to claim 1, it is characterised in that the output control circuit includes One switch and second switch, the first switch are connected in the first current path with the output port, the second switch Be connected in the second current path in opposite direction with first current path with the output port, the first switch and Second switch is selectively turned under the control of the magnetic field detection signal.

16. Magnetic Sensor integrated circuits according to claim 15, it is characterised in that the output control circuit includes connecting The switch being connected between the magnetic field detection circuit and the output port, the magnetic field detection letter of the magnetic field detection circuit output Number control switch so that electric current is flowed outwardly from the output port or flowed inward into from the output port.

17. Magnetic Sensor integrated circuits according to claim 2, it is characterised in that the switch of the magnetic field detection signal Switching frequency is proportional to the frequency of the external ac power source or the twice of frequency equal to the external ac power source.

18. a kind of electric machine assemblies, including the motor powered by an AC power；And as described in claim 1-17 any one Magnetic Sensor integrated circuit.

A kind of 19. application apparatus with electric machine assembly as claimed in claim 18.

20. application apparatus according to claim 19, it is characterised in that the application apparatus is pump, fan, household electrical appliance Or vehicle.