CN106443509A - Magnetic sensor integrated circuit, motor assembly, and application equipment - Google Patents
Magnetic sensor integrated circuit, motor assembly, and application equipment Download PDFInfo
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- CN106443509A CN106443509A CN201610388604.7A CN201610388604A CN106443509A CN 106443509 A CN106443509 A CN 106443509A CN 201610388604 A CN201610388604 A CN 201610388604A CN 106443509 A CN106443509 A CN 106443509A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0023—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration
- G01R33/0029—Treating the measured signals, e.g. removing offset or noise
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
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Abstract
The invention discloses a magnetic sensor integrated circuit, a motor assembly, and application equipment. The magnetic sensor integrated circuit comprises an input port connected with an external power supply, a magnetic field detection circuit, an output port, and an output control circuit. The magnetic field detection circuit comprises a magnetic sensing element, which is used to sense an external magnetic field, and is used to output a detected electric signal; a signal processing unit, which is used for the amplification and interference-eliminating processing of the detected electric signal; and a conversion unit, which is used to convert the detected electric signal after being processed by the signal processing unit into a magnetic field detection signal. Under the control of the output control circuit, the magnetic sensor integrated circuit is operated in a first state or a second state at least based on the magnetic detection signal. According to the first state, current flows outwards through the output port, and according to the second state, the current flows into the output port from outside.
Description
Technical field
The present invention relates to field of circuit technology, more particularly, to Magnetic Sensor integrated circuit.
Background technology
The action principle of Magnetic Sensor is Hall effect, and Hall effect refers to for electric current I to pass to a material, and with electric current
During the direction applying magnetic field B of one-tenth positive angle, in the phenomenon of electric current I and potential difference V produced by right angle orientation of magnetic field B.?
In practical application, Magnetic Sensor is frequently utilized for detecting the polarity of the magnetic field of rotor.
With the continuous improvement to product requirement for the Magnetic Sensor demand manufacturer, at Magnetic Sensor internal circuit configuration and signal
The correlative study of reason process is also constantly deeply.Correspondingly, the magnetic sensing of rotor polarity of the magnetic field is detected using Magnetic Sensor
Device process circuit is it is also desirable to meet Magnetic Sensor demand manufacturer to the ease of use of Magnetic Sensor and testing result accuracy side
The requirement in face.
Content of the invention
Embodiment of the present invention one side provides a kind of Magnetic Sensor integrated circuit, including the input for connecting external power source
Port, magnetic field detection circuit, output port and output control circuit；
Described magnetic field detection circuit is included for perceiving external magnetic field and exporting the magnetic induction element of detection electric signal, be used for
Described detection electric signal is amplified disturbing the signal processing unit processing and for will be through described signal transacting list
The detection electric signal that unit is processed is converted to the converting unit of magnetic field detection signal；
Described output control circuit is used at least based on described magnetic field detection signal, makes described Magnetic Sensor integrated circuit extremely
Few from described output port to the outside first state flowing out electric current and from outside to described output port inflow current the
Run under the one of state of two-state.
Optionally, described detection electric signal includes field signal and deviation signal, and described signal processing unit includes：
It is separated to baseband frequency and chopping frequency for the deviation signal exporting and field signal by described magnetic induction element
The first chopping switch；
Believe for being amplified to separated deviation signal and field signal and by amplified deviation signal and magnetic field
Number exchange to the chopper-type amplifier of described chopping frequency and described baseband frequency；And
For eliminating the low-pass filter circuit of the deviation signal exchanging to described chopping frequency.
Preferably, described baseband frequency is less than 200 hertz and/or described chopping frequency is more than 100K hertz.
Optionally, described input port is used for connecting external ac power source, described baseband frequency and described AC power
Frequency is directly proportional.
Optionally, described input port is used for connecting external ac power source, described baseband frequency and described external magnetic field
Changes of magnetic field frequency equal and be equal to described AC power frequency twice.
Optionally, described detection electric signal include field signal and deviation signal, described signal processing unit include for
The deviation signal of described magnetic induction element output and field signal are separated to the chopping switch of baseband frequency and chopping frequency, use
Recall to base band frequency in the high-pass filter eliminating the deviation signal being separated to described baseband frequency and by described field signal solution
The demodulator of rate.
Optionally, described chopper-type amplifier includes the first amplifier being sequentially connected and the second chopping switch；Wherein,
Described first amplifier includes folded-cascade amplifier, for the deviation letter to described first chopping switch output
Number and field signal carry out first order amplification；
Described second chopping switch is used for carry out deviation signal and the magnetic field of first order amplification through described first amplifier
Signal exchange is to described chopping frequency and baseband frequency.
Optionally, described signal processing unit also include being connected to described chopper-type amplifier and described low pass filter it
Between the second amplifier, described second amplifier be used for through exchange deviation signal and field signal carry out the second level and put
Greatly.
Optionally, described first amplifier exports a pair of differential signal, and described second chopping switch is configured at each
This is exchanged output to differential signal by the later half cycle of clock cycle.
Optionally, described signal processing unit also includes：
It is connected to the sampling hold circuit between described second chopping switch and described low pass filter, described sampling keeps
Circuit is used for each signal in the differential signal after exchanging, within former and later two half periods of each clock cycle respectively
Gathered data is simultaneously divided into two-way sampled signal each to export.
Optionally, described low-pass filter circuit includes the first wave filter, and described first wave filter is used for described sampling is protected
Two pairs of sampled signals holding circuit output carry out addition process respectively, eliminate deviation signal.
Optionally, described low-pass filter circuit also includes the second wave filter, and described second wave filter is used for described first
The differential signal of wave filter output is filtered amplifying.
Optionally, described AD conversion unit includes first comparator, the second comparator and latching logic circuit；Wherein,
Described first comparator and the second comparator connect the one of a pair of differential reference voltage and the output of described low-pass filter circuit respectively
To differential signal, this of first comparator and the second comparator is to differential reference voltage reversal connection；
Wherein, described first comparator is configured to export voltage signal and higher thresholds of described filter circuit output
Comparative result or described 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 described filter circuit output and the comparative result of a lower threshold or the magnetic field intensity of external magnetic field and make a reservation for
The comparative result of point of release；The comparative result that described latching logic circuit is configured to first comparator is to represent that filter circuit is defeated
The voltage signal going out makes comparison circuit export when reaching predetermined work point more than the magnetic field intensity of this higher thresholds or external magnetic field
First level, when the comparative result of the second comparator is that the voltage signal representing described filter circuit output is less than this lower threshold
Or the magnetic field intensity of external magnetic field is when being not up to predetermined point of release, comparison circuit is made to export contrary with the first level second electric
Flat, be in when the voltage signal that the comparative result of described first comparator and the second comparator represents filter circuit output described in relatively
High threshold and lower threshold low between, or represent external magnetic field magnetic field intensity between described operating point and described point of release
When, make the output of comparison circuit keep former output state constant.
Optionally, described output control circuit includes first switch and second switch, described first switch and described output
Port is connected in the first current path, and described second switch and described output port are connected to and described first current path side
To the second contrary current path, described first switch and second switch are selective under the control of described switching mode detection signal
Ground conducting.
Optionally, described output control circuit have from described output pin flow outwardly electric current the first current path,
Flow inward into the second current path of electric current from described output pin and be connected to described first current path and the second electric current
Switch in the one of path of path, described switch is controlled by the magnetic field detection information of described magnetic field detection circuit output, makes
Obtain the first current path and the second current path selectively turns on.
Optionally, described magnetic field detection signal is switching mode detection signal, and described input port is used for connecting external communication
Power supply, the switches switching frequency of described switching mode detection signal is proportional to the frequency of described AC power or is equal to described exchange
The twice of the frequency of power supply.
Embodiment of the present invention another aspect provides a kind of Magnetic Sensor integrated circuit, including for connecting the defeated of external power source
Inbound port, output port and magnetic field detection circuit, described magnetic field detection circuit is included for perceiving external magnetic field and exporting detection
The magnetic induction element of electric signal, signal processing unit and use for described detection electric signal is amplified with interference process
In the converting unit that the detection electric signal through described signal processing unit processes is converted to magnetic field detection signal,
Wherein, the detection electric signal of described magnetic induction element output includes field signal and deviation signal, at described signal
Reason unit includes：
It is separated to baseband frequency and chopping frequency for the deviation signal exporting and field signal by described magnetic induction element
The first chopping switch；
Believe for being amplified to separated deviation signal and field signal and by amplified deviation signal and magnetic field
Number exchange to the chopper-type amplifier of described chopping frequency and described baseband frequency；And
For eliminating the low-pass filter circuit of the deviation signal exchanging to described chopping frequency.
Optionally, described signal processing unit has the feature of above-mentioned signal processing unit.
Optionally, also include the rectification circuit being connected with described input port, described magnetic field detection circuit is by described rectification
The output voltage of circuit is powered.
Optionally, described magnetic field detection signal outwards exports through described output port.
Embodiment of the present invention another further aspect provides a kind of electric machine assembly, including motor and motor-drive circuit, described motor
Drive circuit has above-mentioned Magnetic Sensor integrated circuit.
Embodiment of the present invention another further aspect provides a kind of application apparatus with above-mentioned electric machine assembly.
Preferably, described application apparatus is pump, fan, household electrical appliance or vehicle.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing providing obtains other accompanying drawings.
Fig. 1 is the structural representation of Magnetic Sensor disclosed in the embodiment of the present invention；
Fig. 2 is the structural representation of signal processing unit disclosed in the embodiment of the present invention；
Fig. 3 A is the structural representation of chopper amplifier disclosed in the embodiment of the present invention；
Fig. 3 B is the structural representation of the embodiment of the present invention another chopper amplifier disclosed；
Fig. 4 is the structural representation of Magnetic Sensor integrated circuit disclosed in the embodiment of the present invention；
Fig. 5 is the circuit diagram of rectification circuit disclosed in the embodiment of the present invention；
Fig. 6 is the circuit diagram of Hall sensor and the first chopping switch disclosed in the embodiment of the present invention；
Fig. 7 is the signal schematic representation in circuit shown in Fig. 6；
Fig. 8 is the structural representation of filter circuit disclosed in the embodiment of the present invention；
Fig. 9 is the structural representation of comparison circuit disclosed in the embodiment of the present invention；
Figure 10 is the disclosed principle schematic judging polarity of the magnetic field of the embodiment of the present invention；
Figure 11 is each signal output schematic diagram under cycle clock signal disclosed in the embodiment of the present invention；
Figure 12 is the circuit diagram of output control circuit disclosed in the embodiment of the present invention；
Figure 13 is the circuit diagram of the embodiment of the present invention another output control circuit disclosed；
Figure 14 is the circuit diagram of the embodiment of the present invention another output control circuit disclosed；
Figure 14 A is the circuit diagram of the embodiment of the present invention another output control circuit disclosed；
Figure 15 is the electrical block diagram of electric machine assembly disclosed in the embodiment of the present invention；
Figure 16 is the structural representation of synchronous motor disclosed in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Fig. 1 is the structural representation of Magnetic Sensor disclosed in the embodiment of the present invention, shown in Figure 1, described Magnetic Sensor
Including input port 1, magnetic field detection circuit 2, output port 3.
Input port is used for connecting external power source, provides power supply to magnetic field detection circuit 2.In the present embodiment, this external electrical
Source can be dc source.
Described magnetic field detection circuit 2 include for perceive external magnetic field and export detection electric signal magnetic induction element 21,
For being amplified disturbing the signal processing unit 22 processing and for will be through described signal to described detection electric signal
The detection electric signal that processing unit 22 is processed is converted to the converting unit 23 of magnetic field detection signal；Described magnetic field detection signal can be through
Output port 3 outwards exports.Preferably, there is folded-cascade amplifier 220 in described signal processing unit 22.Preferably,
Described magnetic field detection signal is switching mode data signal.
Described detection electric signal can include field signal and deviation signal.Wherein, described field signal is described magnetic strength
Know the preferable field voltage signal mating with external magnetic field that element testing arrives, described deviation signal includes described magnetic induction element
Dc shift.Carry out interference process to detection electric signal to include eliminating the dc shift of described magnetic induction element.
Fig. 2 shows the structural representation of described signal processing unit 22, shown in Figure 2, described signal processing unit
22 include：It is separated to baseband frequency and chopping frequency for the deviation signal that exports described magnetic induction element and field signal
First chopping switch Z1；For separated deviation signal and field signal are amplified and by amplified deviation signal and
Field signal exchanges to the chopper-type amplifier IA of described chopping frequency and described baseband frequency；Preferably, described chopping frequency
More than 100K hertz, described baseband frequency is less than 200 hertz.
In the present embodiment, described input port is used for connecting external ac power source, described baseband frequency and described alternating current
The frequency in source is directly proportional.Specifically, in an example that can realize, the changes of magnetic field of described baseband frequency and external magnetic field
Frequency equal and be equal to described ac power frequency twice.
Referring to Fig. 3 A, in a possible implementation, described chopper-type amplifier IA can include being sequentially connected
First amplifier A1 and the second chopping switch Z2；Wherein, described first amplifier A1 includes folded-cascade amplifier, for right
The deviation signal of described first chopping switch Z1 output and field signal carry out first order amplification；Described second chopping switch Z2 uses
In by carry out the deviation signal of first order amplification through described first amplifier A1 and field signal exchange to described chopping frequency and
Baseband frequency.
Described signal processing unit 22 also includes the low pass filtered for eliminating the deviation signal exchanging to described chopping frequency
Wave circuit LPF.
Described low-pass filter circuit LPF can include the first wave filter for eliminating described deviation signal.
Further, in other examples, described low-pass filter circuit LPF, in addition to above-mentioned first wave filter, also wraps
Include the second wave filter, described second wave filter is used for the signal of described first wave filter output being filtered further and putting
Greatly.
Fig. 3 B is the structural representation of the embodiment of the present invention another chopper amplifier disclosed, as shown in Figure 3 B, described
Signal processing unit 22 (includes the first amplifier A1 and the except described first chopping switch Z1, described chopper-type amplifier IA
Two chopping switch Z2) and described low pass filter LPF outside, can also include being connected to described chopper-type amplifier IA and described low
The second amplifier A2 between bandpass filter LPF, described second amplifier A2 are used for the deviation signal through exchanging and magnetic field
Signal carries out second level amplification.Preferably, the second amplifier A2 can be one-stage amplifier.
In other examples, described second amplifier A2 may also be arranged on the circuit knot of described chopper-type amplifier IA
In structure, it is located between the first amplifier A1 and the second chopping switch Z2.
Magnetic Sensor disclosed in the embodiment of the present invention, its internal magnetic field detection circuit can be effectively to input voltage signal
Carry out gain amplification, eliminate the operation such as offset voltage and filtering so that magnetic field detection circuit output, for indication motor rotor
The signal degree of accuracy of polarity of the magnetic field greatly promotes.
Fig. 4 shows the Magnetic Sensor integrated circuit according to another embodiment of the present invention, described Magnetic Sensor integrated circuit
Including input port 4, output port 5, rectification circuit 110, magnetic field detection circuit 120 and output control circuit 130.
Described input port 4 can include 41 mouthfuls of first input end and the second input port connecting external ac power source
42.In the present invention, input port connects external power source and had both included the situation that input port is directly connected to external power source two ends,
It is serially connected with the situation at external power source two ends including input port and external loading, the present invention does not limit to this, specifically regard feelings
Depending on condition.
In one particular embodiment of the present invention, described rectification circuit 110 includes full-wave rectification bridge and complete with described
The voltage regulation unit that the output of ripple rectifier bridge connects, wherein, described full-wave rectification bridge is used for the exchange of described AC power output
Signal is converted into direct current signal, and described voltage regulation unit is used for stable for the direct current signal of described full-wave rectification bridge output in preset value
In the range of.Magnetic field detection circuit 120 and output control circuit 130 directly or indirectly can be supplied by the output voltage of rectification circuit 110
Electricity.
Fig. 5 illustrates a kind of physical circuit of rectification circuit 60, and wherein, voltage regulation unit includes being connected to full-wave rectification bridge 61
Zener diode 621 between two output ends, described full-wave rectification bridge 61 includes：First diode 611 and second of series connection
3rd diode 613 of diode 612 and series connection and the 4th diode 614；Described first diode 611 and the described 2nd 2
The common port of pole pipe 612 is electrically connected with described first input port VAC+；Described 3rd diode 613 and described 4th diode
614 common port is electrically connected with described second input port VAC-.
Wherein, the input of described first diode 611 and the input of described 3rd diode 613 are electrically connected to form entirely
The ground connection output end of ripple rectifier bridge, the output end of described second diode 612 and the output end of described 4th diode 614 are electrically connected
Meet the voltage output end VDD forming full-wave rectification bridge, Zener diode 621 is connected to described second diode 612 and the 4th 2
Between the common port of pole pipe 614 and described first diode 611 and the common port of described 3rd diode 613.
Described magnetic field detection circuit 120 can include：(also referred to as magnetic strength knows unit to the Hall sensor 121 being sequentially connected
Part), the first chopping switch 122, amplifier 123, sampling hold circuit 124, filter circuit 125 and comparison circuit 126.
The input of described Hall sensor 121 connects the output end of rectification circuit 110, accesses described rectification circuit 110
The DC voltage of output, for giving described first chopping switch 122 according to described direct voltage output magnetic field perceptual signal.
Fig. 6 is the Hall sensor of the embodiment of the present invention and a kind of physical circuit of the first chopping switch.Wherein, Hall sense
Survey device 121 is Hall Plate, and including two groups of binding posts 11,12,13 and 14 relatively setting, the first chopping switch 122 includes can
Switching switch 16,18,19 and 20.Changeable switch 16 controls binding post 11 and 14 alternately to turn on power end VCC, can
Switching switch 18 controls binding post 12 and 13 alternately to turn on ground.Changeable switch 19 controls binding post 11 and 14 to hand over
Turn on output end P1 for property, changeable switch 20 controls binding posts 12 and 13 alternately to turn on output end N1.Institute
State four changeable switches be configured as binding post 11 or 14 one of them with during VCC conducting, binding post 11 or 14 its
In another conducting with output end P1, binding post 12 binding post relative with the terminal connecting VCC in 13 with this with lead
Logical, binding post 12 is turned on output end N1 with the terminal not connected with ground in 13.Output end P1 and N1 export a pair of difference letter
Number.
That is, when changeable switch 16 and 18 control Hall Plate binding post 11 and 13 respectively with power Vcc and
During ground conducting, changeable switch 19 and 20 controls binding post 12 and 14 to turn on as output end；When changeable switch 16 and 18
Control binding post 14 and 12 respectively with when power Vcc and ground conducting, changeable switch 19 and 20 controls binding post 11 and 13
As output end conducting.
In alternatively possible scheme, terminals can also be made by configuring switching switch in the half period of clock
Son 11 and 13 is turned on power Vcc and ground respectively, so that binding post 12 and 14 is turned on as output end；In clock other half
Cycle switches to makes binding post 12 and 14 turn on power Vcc and ground respectively, so that binding post 13 and 11 is led as output end
Logical.
Table 1 below illustrates a kind of possible connection side of former and later two half periods a clock cycle for each binding post
Case.
Table 1
| Binding post | First half cycle | The later half cycle |
| 11 | Vcc | P1 |
| 12 | P1 | Vcc |
| 13 | Ground | N1 |
| 14 | N1 | Ground |
Table 2 below illustrate each binding post in another kind of instantiation a clock cycle former and later two half periods one
Plant possible connection scheme.
Table 2
| Binding post | First half cycle | The later half cycle |
| 11 | Vcc | N1 |
| 12 | P1 | Ground |
| 13 | Ground | P1 |
| 14 | N1 | VCC |
In above two connection scheme, in the later half cycle of a clock cycle, connect power Vcc and connect for a pair of ground
Connecting terminal is each converted to and ratates 90 degrees the connection terminal of rear corresponding position front along (or counterclockwise) direction clockwise
The connection status of half period, connects output end P1 and a pair of connection terminal of N1 is then converted to along (or clockwise) counterclockwise
Rightabout ratates 90 degrees the connection status in first half cycle for the connection terminal of rear corresponding position.In a next clock cycle
First half cycle, each connection terminal then switches back into the connection status of the first half cycle of a clock cycle, by that analogy.
Preferably, power Vcc can be the output to rectification circuit 110 carries out the constant pressure source after lowering and stabilizing blood pressure process.Can
To understand, power supply can also be constant-current source.
Preferably, each changeable switch is realized by a pair of switches, this is all high level conducting to switch or low level is led
Logical, and controlled by the clock signal of a pair of complementation.By switch being provided with two identical to frequency and complementary two-by-two clocks to four
Signal can realize aforesaid conduction mode.In the embodiment of the present invention, the frequency of clock signal can be more than 100K hertz, preferably
Hundreds of K hertz.
Fig. 7 is the signal schematic representation in circuit shown in Fig. 6.Wherein, CK1 is clock signal；Vos is Hall sensor 121
Deviation voltage signal, the physical property of Hall Plate 121 determine it can be assumed that its any moment in clock signal period all
It is to maintain constant.Vin and-Vin is that the first chopping switch output exports in the first half cycle of clock signal CK1 and later half cycle
Preferable field voltage signal, i.e. the preferable output of Hall Plate 121 unbiased difference signal interference.As previously described, in clock signal
One half period of CK1, binding post 11 and 13 is turned on power Vcc and ground respectively, and binding post 12 and 14 is as output end
Conducting；When another half period binding post 12 and 14 of clock signal CK1 is respectively with power Vcc and ground conducting, terminals
Son 11 and 13 is as output end conducting.In former and later two half periods of clock signal CK1, the preferable magnetic of the first chopping switch output
Field voltage signal magnitude is equal, in opposite direction.Vout is the output signal of the first chopping switch, is deviation signal Vos and ideal
The superposition of field signal Vin.Through the first chopping switch, above-mentioned deviation voltage signal and preferable field voltage Signal separator are to base
Band frequency and chopping frequency.Wherein, chopping frequency is the frequency of clock signal, and baseband frequency is the outside magnetic that Hall Plate is detected
The change in polarity frequency of field.
In one embodiment of the present invention, the preferable field voltage signal that described Hall sensor 121 exports is very
Little, generally only have several millivolts of zero point, close to 10 millivolts, the therefore later stage needs to eliminate deviation signal deviation signal Vos, and to ideal
Signal carries out high-gain process.
In the present embodiment amplifier 123 can using the chopper amplifier shown in Fig. 3 B, including the first amplifier A1, the
Two chopping switch Z2 and the 3rd amplifier A2.First amplifier A1 and the second chopping switch be used for separated deviation signal and
Field signal is amplified and amplified deviation signal and field signal is exchanged to described chopping frequency and described base band frequency
Rate.Second level amplifier A2 amplifies further to the signal after exchanging.Wherein, the first amplifier A1 is collapsible amplifier,
Second amplifier A2 can be one-stage amplifier.
In the present embodiment, the output of the first amplifier A1 is also a pair of differential signal, and the second chopping switch Z2 is configured to
First half cycle in each clock cycle directly exports this, and to differential signal, the later half cycle in each clock cycle is right by this
Differential signal exchanges output, and a pair of output signal of the second chopping switch is expressed as P2 and N2.
Described sampling hold circuit 124 is used for gathering out each signal from described differential signal P2 and N2 when different
The clock half period, i.e. the signal value output of former and later two half periods exporting to described filter circuit 125, wherein P2 is when different
The sampled signal of clock half period is P2A and P2B, and N2 is N2A and N2B in the sampled signal of corresponding clock half cycle.
Described filter circuit 125 is used for described P2A＆P2B and N2A＆N2B signal being carried out eliminate deviation processing, and can
Carry out gain amplification to eliminating the differential signal obtaining after deviation, differential signal P3 and N3 after output gain amplification is to described ratio
Compared with circuit 126.
In the present embodiment, described filter circuit 125 is low pass filter.With reference to shown in Fig. 8, preferably, filter circuit 125
The first wave filter F1 and the second wave filter F2 can be included.First wave filter F1 to described two pairs of sampled signals P2A, P2B and
N2A, N2B carry out addition two-by-two and process, and to eliminate deviation signal, can carry out gain amplification to signal simultaneously；Second wave filter
F2 is used for the differential signal of the first wave filter F1 output is filtered again and gain is amplified, a pair of differential signal P3 of output and
N3.
It is appreciated that in a further embodiment, filter circuit 125 only can also arrange a wave filter, now in it
Resistance value in portion's circuit needs very great talent to ensure that signal obtains than larger gain.
Described comparison circuit 126 is used for being compared described differential signal P3 and N3 with reference voltage, output switch type
Magnetic field detection signal；Described magnetic field detection signal is used for indicating the polarity of external magnetic field that described Hall sensor 121 detects；
The output end of described comparison circuit 126 connects output control circuit 130.
Fig. 9 is the structural representation of AD conversion unit disclosed in the embodiment of the present invention (comparison circuit 126), and Figure 10 is this
The disclosed principle schematic judging polarity of the magnetic field of inventive embodiments, referring to shown in Fig. 9 and Figure 10, described comparison circuit 126 is relatively
Good for hysteresis comparator, including：First comparator C1, the second comparator C2 and latching logic circuit S；Described first comparator
C1 and the second comparator C2 connects differential signal P3, N3 respectively, and a pair of differential reference voltage Vh and Vl tetra- road signal, and first
This of comparator C1 and the second comparator C2 is to differential reference voltage reversal connection.First comparator C1 is used for exporting filter circuit
Voltage signal is compared with higher thresholds Rh, and the second comparator C2 is used for voltage signal and the relatively low threshold exporting filter circuit
Value Rl compares.The output end of described first comparator C1 and described second comparator C2 is transfused to described latching logic circuit S.
In conjunction with Figure 10, the comparative result that latching logic circuit S is configured to first comparator C1 is filter circuit output
Voltage signal is more than when the magnetic field intensity of this higher thresholds or external magnetic field reaches operating point Bop makes comparison circuit 126 export the
One level (as high level), expression external magnetic field is a kind of magnetic polarity, when the second comparator C2 relatively show that filter circuit exports
Voltage signal when being less than the magnetic field intensity of this lower threshold or external magnetic field and being not up to point of release Brp, make comparison circuit 126 defeated
Go out second electrical level (low level), represent that external magnetic field is another kind of magnetic polarity, when the voltage signal of filter circuit output is in relatively
High threshold and lower threshold low between, or the magnetic field intensity of external magnetic field between operating point Bop and point of release Brp when, make ratio
Keep former output state constant compared with the output of circuit 126.
It is appreciated that in another embodiment, latching logic circuit S can be configured to the comparative result of first comparator C1
It is to make ratio when the voltage signal of filter circuit output reaches operating point Bop more than the magnetic field intensity of this higher thresholds or external magnetic field
Export low level compared with circuit 126；When the voltage signal that the second comparator C2 relatively draws filter circuit output is less than this relatively low threshold
When the magnetic field intensity of value or external magnetic field is not up to point of release Brp, comparison circuit 126 is made to export high level；When filter circuit is defeated
The voltage signal going out be in higher thresholds and lower threshold low between, or the magnetic field intensity of external magnetic field is in operating point Bop and releasing
When putting between point Brp, the output of comparison circuit 126 is made to keep former output state constant.
In the embodiment of the present invention, higher to the sensitivity requirements of described Hall sensor 121, Hall sensor 121 exports
Actually detected signal can be very little, for example may only have several millivolts of zero point it is therefore desirable to be amplified accordingly to it, this is just
Described amplifier 123 is required to have a high yield value of comparison, by the actually detected signal of described Hall sensor 121 to the greatest extent
May amplify, be easy to subsequently it be processed accordingly.
In preferred embodiments, the supply voltage about 2.5V of magnetic field detection circuit, the multiplication factor of signal processing unit
Between 1000 times to 2000 times, preferably 1600 times, can be by a few person of outstanding talent of zero point to export described Hall sensor 121
The preferable field voltage of volt is amplified to about the half of this supply voltage.In signal processing unit, amplifier Main Function is letter
Number amplification, filter circuit Main Function be eliminate interference signal.In filter circuit, the first wave filter F1 is substantially carried out filtering,
Its yield value can be less than the yield value of the second wave filter.Therefore, the yield value of described amplifier 123 is more than described filter circuit
Yield value, the yield value of the first wave filter is more than the yield value of the second wave filter.In implementing at one, described amplifier
123 be yield value can be 50, the yield value of described filter circuit 125 can be 32 about.In implementing at one, first
The yield value of wave filter can be 4, and the second wave filter F2 yield value can be 8.
The amplifier of folded cascode structure is adopted, this structure can in described amplifier 123 in the embodiment of the present invention
There is provided high-gain and high bandwidth disposal ability simultaneously, there is good frequency characteristic and Slew Rate.
In conjunction with Figure 11, the signal processing to the signal processing unit of magnetic field detection circuit disclosed in the embodiment of the present invention
Illustrate, Figure 11 left side illustrates each differential signal output under cycle clock signal for each module, and the right is corresponding signal
Frequency domain schematic diagram.
From 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, is simultaneously equal to the difference of differential signal P1 and N1, and 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.With reference to Figure 11 left side diagram, signal P1 used respectively in former and later two half periods of clock signal
P1A and P1B represents, 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, omit the coefficient 1/2 of differential signal in explained below, through the first amplifier A1, second cuts
The input signal of ripple switch is a pair of differential signal P1 ' and N1 ', and signal P1 ' used respectively in former and later two half periods of clock signal
P1A ' and P1B ' represents, signal N1 ' uses N1A ' and N1B ' to represent in former and later two half periods of clock signal respectively, and its output is respectively
For：
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 droop in the output signal of the first amplifier,
Equal to the droop Vos of Hall sensor 121 and the droop sum of the first amplifier.For ease of understanding, retouching below
State the middle omission coefficient of differential signal and the amplification coefficient of amplifier.
Then after sampling hold circuit：
The first half cycle that second chopping switch Z2 was configured in each clock cycle directly exports this to differential signal
In the later half cycle of each clock cycle, this is exchanged output, a pair of differential output signal of the second chopping switch to differential signal
It is expressed as P2 and N2.Signal P2 was represented with P2A and P2B respectively in former and later two half periods of clock signal, and signal N2 believes in clock
Number former and later two half periods represent, 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)；
Sampling hold circuit 124 for each signal in differential signal P2 and N2, each clock cycle former and later two
Gathered data be divided into two-way sampled signal each to export respectively in half period, that is, sampling hold circuit output two is to sampling letter
Number, be for a pair P2A and P2B, another to being N2A and N2B.
The above-mentioned four road signals obtaining through over-sampling, through described filter circuit, export P3 and N3；The filtering of filter circuit
Two pairs of sampled signals that device exports to sampling hold circuit carry 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 only preferable field voltage signal in output signal P3 of filter circuit and N3, deviation signal by
Eliminate.
Illustrate on the right of Figure 11, from the perspective of frequency domain, through the first chopping switch, it is inclined that magnetic induction element exports
Difference signal and field signal are split into baseband frequency and chopping frequency, and chopping frequency is the frequency of clock signal, such as above institute
State, chopping frequency is preferably hundreds of K hertz, baseband frequency is equal with the change frequency of external magnetic field.When by the present embodiment
When Magnetic Sensor integrated circuit is used for synchronous motor control, external magnetic field can be p-m rotor magnetic field, and its change frequency is equal to be handed over
2 times of stream supply frequency.When this synchronous motor is by common 50 hertz or 60 hertz of mains electricity power supply, baseband frequency
For 100 hertz or 120 hertz.Through the second chopping switch, amplified deviation signal and field signal be switched to described in cut
Wave frequency rate, and baseband frequency.Due in the embodiment of the present invention, the frequency domain span of chopping frequency and baseband frequency very big it is desirable to institute
State amplifier 123 and also there is while there is high-gain high bandwidth disposal ability, to realize the gain to ideal detection signal
Amplify.
In another embodiment of the present invention, the detection electric signal of magnetic field detection circuit output includes field signal and partially
Difference signal, described signal processing unit includes being separated to for the deviation signal exporting and field signal by described magnetic induction element
The chopping switch of baseband frequency and chopping frequency, the high-pass filtering for eliminating the deviation signal being separated to described chopping frequency
Device and the demodulator that described field signal solution is recalled to baseband frequency.
Output control circuit 130 is used at least based on described switching mode detection signal, makes described Magnetic Sensor integrated circuit
At least flowing out the first state of electric current and from outside to described output port inflow current from described output port to outside
Run under the one of state of second state.
In a preferred embodiment, output control circuit 130 is configured at least based on described switching mode detection signal,
Described integrated circuit is made at least to flow out the first state of electric current and from outside to described output from described output port to outside
Switch between the second state of port inflow current.
What deserves to be explained is, in the embodiment of the present invention, Magnetic Sensor integrated circuit is cut between first state and the second state
Change operation however it is not limited to one of state switches to the situation of another state immediately after terminating, also include one of shape
State terminates the situation that rear separated in time switches to another state again.In one preferably application example, two states
In the interval time of switching, the output port of Magnetic Sensor integrated circuit no exports.
On the basis of above-described embodiment, in one embodiment of the invention, described output control circuit 130 includes：
First switch and second switch, described first switch and described output port are connected in described first current path, and described the
Two switches are connected in the second current path in opposite direction with described first current path with described output port, and described first
Switch and second switch selectively turn under the control of described magnetic field detection information.Preferably, described first switch is permissible
For triode, described second switch can be triode or diode, and the present invention does not limit to this, depends on the circumstances.
Specifically, in one embodiment of the invention, as shown in figure 12, described first switch 31 and second switch 32 are
The semiconductor switch of a pair of complementation.Described first switch 31 turns on for low level, and described second switch 32 turns on for high level, its
In, described first switch 31 and described output port Pout are connected in the first current path, described second switch 32 with described
Output port Pout is connected in the second current path, the control of described first switch 31 and 32 two switches of described second switch
End is all connected with magnetic field detection circuit 20, and the current input terminal of first switch 31 connects high voltage (such as dc source), and electric current is defeated
Go out end to be connected with the current input terminal of second switch 32, the current output terminal of second switch 32 connects low voltage (such as).If
The magnetic field detection information of described magnetic field detection circuit 20 output is low level, and first switch 31 turns on, and second switch 32 disconnects, and bears
Carry electric current to flow outwardly from high voltage through first switch 31 and output port Pout, if the output of described magnetic field detection circuit 20
Magnetic field detection information is high level, and second switch 32 turns on, and first switch 31 disconnects, and load current flows into output port from outside
Pout simultaneously flows through second switch 32.In the example of Figure 12, first switch 31 is positive channel mos field effect transistor
Pipe (p-type MOSFET), second switch 32 is negative channel mos field-effect transistor (N-type MOSFET).Permissible
It is understood by, in other embodiments, first switch and second switch can also be other kinds of semiconductor switch, for example may be used
To be other field-effect transistors such as junction field effect transistor (JFET) or metal semiconductor field effect transis (MESFET).
In another embodiment of the present invention, as shown in figure 13, the switch that described first switch 31 turns on for high level
Pipe, described second switch 32 is one-way conduction diode, and the negative electrode of the control end of first switch 31 and second switch 32 connects magnetic
Field testing circuit 20.The current input terminal of first switch 31 connects the output of rectification circuit, the current output terminal of first switch 31
It is all connected with output port Pout with the anode of second switch 32.Wherein, described first switch 31 and described output port Pout
It is connected in the first current path, described output port Pout, described second switch 32 are connected with described magnetic field detection circuit 20
In the second current path, if the magnetic field detection information of described magnetic field detection circuit 20 output is high level, first switch 31 is led
Logical, second switch 32 disconnects, and load current self-rectifying circuit flows outwardly through first switch 31 and output port Pout, if described
The magnetic field detection information of magnetic field detection circuit 20 output is low level, and second switch 32 turns on, and first switch 31 disconnects, load electricity
Stream flows into output port Pout and flows through second switch 32 from outside.It is appreciated that in other embodiments of the invention, described
First switch 31 and described second switch 32 can also be other structures, and the present invention does not limit to this, specifically optionally and
Fixed.
In another embodiment of the present invention, described output control circuit 30 has and flows outwardly from described output pin
First current path of electric current, flow inward into the second current path of electric current from described output pin and be connected to described
Switch in one current path and the one of path of the second current path, described switch is by described magnetic field detection circuit output
Magnetic field detection information controls so that the first current path and the second current path selectively turn on.Optionally, described first electric current
Switch is not set in path and the second current path other in which path.
Implement as one kind, as shown in figure 14, described output control circuit 30 includes a unidirectional conducting switch 33, single
Guide is opened up pass 33 and is connected in the first current path with output port Pout, and its current input terminal can connect magnetic field detection circuit
20 output end, the output end of magnetic field detection circuit 20 also can be connected to and the described first electricity through resistance R1 and output port Pout
In logical circulation road the second current path in opposite direction.Unidirectional conducting switch 33 turns on when magnetic field induction signal is for high level, bears
Carry electric current to flow outwardly through unidirectional conducting switch 33 and output port Pout, described magnetic field induction signal is unidirectional during low level
Open up pass 33 disconnection, load current flows into output port Pout and flows through resistance R1 and magnetic field detection circuit 20 from outside.As
A kind of replacement, the resistance R1 in described second current path can also replace with unidirectional with unidirectional conducting switch 33 reverse parallel connection
Conducting switch.So, more balance from the output port load current flowing out and the load current flowing into.
In another kind implements, as shown in Figure 14 A, described output control circuit 30 includes differential concatenation in magnetic field inspection
Diode D1 and D2 between the output end of the slowdown monitoring circuit 20 and output port Pout electricity in parallel with diode D1 and D2 connecting
Resistance R1 and be connected to resistance R2 between the common port of diode D1 and D2 and power Vcc, wherein, the negative electrode of diode D1
It is connected with the output end of magnetic field detection circuit 20.Diode D1 is controlled by magnetic field detection information.It is high electricity in magnetic field detection information
Diode D1 cut-off at ordinary times, load current flows outwardly from output port Pout through resistance R2 and diode D2, the inspection of described magnetic field
When measurement information is low level, load current flows into output port Pout and flows through resistance R1 and magnetic field detection circuit 20 from outside.
In the Magnetic Sensor integrated circuit of the embodiment of the present invention, market AC power can be directly connected to, be not required to additionally connect
Connect AC-DC converter part, be easy to use simple；And its internal magnetic field detection circuit can be effectively to input voltage signal
Carry out gain amplification, eliminate the operation such as offset voltage and filtering so that magnetic field detection circuit output, for indication motor rotor
The signal degree of accuracy of polarity of the magnetic field greatly promotes.
With reference to a concrete application, the Magnetic Sensor integrated circuit that the embodiment of the present invention is provided is described.
As shown in figure 15, the embodiment of the present invention additionally provides a kind of electric machine assembly, and described electric machine assembly includes：Exchanged by one
Two-way admittance switch 300 and above-mentioned of the present invention of foundation that the motor 200 of power supply 100 power supply is connected with described motor 200
The Magnetic Sensor integrated circuit 400 that one embodiment is provided, the output port of described Magnetic Sensor integrated circuit 400 is double with described
Guide opens up the control end electrical connection closing 300.
Preferably, two-way admittance switch 300 can be triac (TRIAC).It is appreciated that two-way lead
Open up Guan Yeke to be realized by other kinds of suitable switch, for example, can include two thyristors of reverse parallel connection, and
Corresponding control circuit is set, according to Magnetic Sensor integrated circuit output port output signal through described control circuit according to
Predetermined way controls this two thyristors.
Preferably, described electric machine assembly also includes reduction voltage circuit 500, for providing after being depressured described AC power 100
To described Magnetic Sensor integrated circuit 400.Magnetic Sensor integrated circuit 400 is installed near the rotor of motor 200 to perceive rotor
Changes of magnetic field.
On the basis of above-described embodiment, in one particular embodiment of the present invention, described motor is synchronous motor, can
To understand, the Magnetic Sensor integrated circuit of the present invention is applicable not only to synchronous motor, is also applied for other kinds of magneto
As DC brushless motor.As shown in figure 16, described synchronous motor include stator and can relative stator rotation rotor 11.Stator has
There is stator core 12 and be set around the stator winding 16 in stator core 12.Stator core 12 can be by pure iron, cast iron, cast steel, electricity
The soft magnetic materials such as work steel, silicon steel are made.Rotor 11 has permanent magnet, and when stator winding 16 is connected with AC power, rotor 11 is steady
The state stage, wherein f was the frequency of described AC power with the rotating speed constant-speed operation of 60f/p circle/minute, and p is the number of pole-pairs of rotor.
In the present embodiment, stator core 12 has two relative pole portions 14.Each pole portion has a polar arc face 15, the outer surface of rotor 11 with
Polar arc face 15 relatively, forms substantially uniform air gap between the two.Substantially homogeneous air gap alleged by the application, refers to stator and rotor
Between most of form even air gap, only fewer parts is non-homogeneous air gap.Preferably, the polar arc face 15 in stator poles portion sets
The starting groove 17 of indent, on polar arc face 15, the part in addition to starting groove 17 is then concentric with rotor.Above-mentioned configuration can form inequality
Even magnetic field is it is ensured that rotor its pole axis S1 when static tilts an angle it is allowed to motor with respect to the central shaft S2 in stator poles portion
When being energized every time in the presence of integrated circuit, rotor can have starting torque.The pole axis S1 of wherein rotor refers to two poles of rotor
Line of demarcation between the different magnetic pole of property, the central shaft S2 in stator poles portion 14 refers to the line through two Ji Bu 14 centers of stator.
In the present embodiment, stator and rotor are respectively provided with two magnetic poles.It should be understood that in more embodiments, the magnetic of stator and rotor
Number of poles can also be unequal, and has more magnetic poles, such as four, six etc..
On the basis of above-described embodiment, in one embodiment of the invention, described output control circuit 30 is configured
It is that for positive half period and described magnetic field detection circuit 20 detects that the magnetic field of described p-m rotor is first in described AC power 100
Polarity or described AC power 100 are the magnetic field that negative half-cycle and described magnetic field detection circuit 20 detect described p-m rotor
It is second polarity chron opposite polarity with described first, make the conducting of described two-way admittance switch 300.When described AC power 100
It is described first polarity for negative half-cycle and p-m rotor, or described AC power 100 is positive half period and described permanent magnetism turns
Son is the second polarity chron, makes the cut-off of described two-way admittance switch 300.
Preferably, described output control circuit 30 is configured to be located at just half in the signal of described AC power 100 output
Cycle and described magnetic field detection circuit 20 detect that the magnetic field of described p-m rotor is the first polarity chron, and control electric current is by described integrated
Circuit flows to described two-way admittance switch 300, and the signal in the output of described AC power 100 is located at negative half-cycle and described magnetic
Testing circuit 20 detects that the magnetic field of described p-m rotor is second polarity chron opposite polarity with described first, control electric current by
Described two-way admittance switch 300 flows to described integrated circuit.It is appreciated that p-m rotor is the first magnetic polarity and AC power is
Positive half period, or p-m rotor is when to be the second magnetic polarity and AC power be negative half-cycle, and described integrated circuit flows out or flows
Enter the situation that electric current had both included having electric current to flow through in above-mentioned two situations whole duration section, also include above-mentioned two situations
Under only have the situation that electric current flows through in part-time section.
In a preferred embodiment of the present invention, two-way admittance switch 300 adopts triac (TRIAC),
Rectification circuit 60 adopts the circuit shown in Fig. 5, and output control circuit adopts the circuit shown in Figure 12, the in output control circuit 30
The current input terminal of one switch 31 connects the voltage output end of full-wave rectification bridge 61, and the current output terminal of second switch 32 connects entirely
The ground connection output end of ripple rectifier bridge 61.When the signal of AC power 100 output is located at positive half period and described magnetic field detection circuit
During 20 output low level, in output control circuit 30, first switch 31 turns on and second switch 32 disconnects, and electric current flows successively through friendship
Stream power supply 100, motor 200, the first input end of integrated circuit 400, reduction voltage circuit (not shown), full-wave rectification bridge 61
The second diode 612 output end, the first switch 31 of output control circuit 30, from output port flow to two-way admittance switch
300 return to AC power 100.After TRIAC300 conducting, the series connection of reduction voltage circuit 500 and Magnetic Sensor integrated circuit 400 formation
Branch road is shorted, and Magnetic Sensor integrated circuit 400 stops because of unpowered voltage exporting, and TRIAC300 is due to flowing through two
Electric current between anode sufficiently large (maintaining electric current higher than it), the situation of no driving current between control pole and its first anode
Under, TRIAC300 remains on.When the signal of AC power 100 output is located at negative half-cycle and described magnetic field detection circuit 20
During output high level, in output control circuit 30, first switch 31 disconnects and second switch 32 turns on, and electric current is from AC power 100
Flow out, from two-way admittance switch 300 inflow output port, the second switch 32 through output control circuit 30, full-wave rectification bridge 61
Ground connection output end and the first diode 611, the first input end of integrated circuit 400, motor 200 return to AC power 100.
Likewise, after TRIAC300 conducting, Magnetic Sensor integrated circuit 400 stops output short-circuit because being shorted, and TRIAC300 then may be used
It is held on.When the signal of AC power 100 output is located at positive half period and described magnetic field detection circuit 20 output high level, or
The signal of person's AC power 100 output is located at negative half-cycle and described magnetic field detection circuit 20 exports low level, output control electricity
In road 30, first switch 31 and second switch 32 all can not turn on, and TRIAC300 ends.Thus, described output control circuit 30 can
Change in polarity based on AC power 100 and magnetic field detection information, make described integrated circuit control two-way admittance switch 300 with pre-
Determine mode to switch between conducting and cut-off state, and then control the step mode of stator winding 16, make the change that stator produces
Magnetic field coordinates the magnetic field position of rotor, only drags rotor rotation along single direction, thus rotor tool when ensureing that motor is energized every time
There is fixing direction of rotation.
In the embodiment of the present invention, magnetic field detection signal is switching mode detection signal, in the steady-state process of motor, described switch
The switches switching frequency of type detection signal is equal to the twice of the frequency of described AC power.
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 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, controls
Two-way admittance switch switches in a predefined manner between conducting and cut-off state, and then controls the step mode of stator winding.
Electric machine assembly in the embodiment of the present invention can be used for but is not limited to the equipment such as pump, fan, household electrical appliance, car
In, described household electrical appliance can be for example washing machine, dish-washing machine, smoke exhaust ventilator, exhaust fan etc..
It is appreciated that being above to retouching that the Magnetic Sensor integrated circuit of the present invention is made with reference to a kind of possible application
State, the Magnetic Sensor of the present invention is not limited in above-mentioned application, for example, is applied not only to Motor drive, it may also be used for other have
The application of magnetic field detection.
In the present embodiment, described Magnetic Sensor integrated circuit can be directly connected to market AC power, is not required to additionally connect
AC-DC converter part, is easy to use simple；And its internal magnetic field detection circuit can effectively enter to input voltage signal
Row gain amplifies, eliminates the operation such as offset voltage and filtering so that magnetic field detection circuit output, for indication motor rotor magnetic
The signal degree of accuracy of field polarity greatly promotes.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Also, it should be noted herein, such as first and second or the like relational terms are used merely to one
Entity or operation are made a distinction with another entity or operation, and not necessarily require or imply between these entities or operation
There is any this actual relation or order.And, term " inclusion ", "comprising" or its any other variant are intended to contain
Comprising of lid nonexcludability, wants so that including a series of process of key elements, method, article or equipment and not only including those
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element that limited by sentence "including a ..." it is not excluded that
Also there is other identical element including in the process of described key element, method, article or equipment.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one
The scope the widest causing.
Claims (23)
1. a kind of Magnetic Sensor integrated circuit it is characterised in that include for connect external power source input port, magnetic field detection
Circuit, output port and output control circuit；
Described magnetic field detection circuit is included for perceiving external magnetic field and exporting the magnetic induction element of detection electric signal, be used for institute
State detection electric signal to be amplified disturbing the signal processing unit processing and for will be at described signal processing unit
The detection electric signal of reason is converted to the converting unit of magnetic field detection signal；
Described output control circuit is used at least based on described magnetic field detection signal, so that described Magnetic Sensor integrated circuit is at least existed
Flow out the first state of electric current from described output port to outside and from outside the second shape to described output port inflow current
Run under the one of state of state.
2. Magnetic Sensor integrated circuit according to claim 1 is it is characterised in that described detection electric signal includes magnetic field letter
Number and deviation signal, described signal processing unit includes：
Deviation signal and field signal for exporting described magnetic induction element are separated to the of baseband frequency and chopping frequency
One chopping switch；
Hand over for being amplified to separated deviation signal and field signal and by amplified deviation signal and field signal
Change to the chopper-type amplifier of described chopping frequency and described baseband frequency；And
For eliminating the low-pass filter circuit of the deviation signal exchanging to described chopping frequency.
3. Magnetic Sensor integrated circuit according to claim 2 is it is characterised in that described baseband frequency is less than 200 hertz
And/or described chopping frequency is more than 100K hertz.
4. Magnetic Sensor integrated circuit according to claim 2 is it is characterised in that described input port is used for connecting outside
AC power, described baseband frequency is directly proportional to the frequency of described AC power.
5. Magnetic Sensor integrated circuit according to claim 2 is it is characterised in that described input port is used for connecting outside
AC power, described baseband frequency equal with the changes of magnetic field frequency of described external magnetic field and be equal to described AC power frequency
Twice.
6. Magnetic Sensor integrated circuit according to claim 1 is it is characterised in that described detection electric signal includes magnetic field letter
Number and deviation signal, described signal processing unit includes：
It is separated to cutting of baseband frequency and chopping frequency for the deviation signal that exports described magnetic induction element and field signal
Ripple switchs；
For eliminating the high-pass filter of the deviation signal being separated to described baseband frequency；And
Described field signal solution is recalled to the demodulator of baseband frequency.
7. Magnetic Sensor integrated circuit according to claim 2 is it is characterised in that described chopper-type amplifier is included successively
The first amplifier connecting and the second chopping switch；Wherein,
Described first amplifier includes folded-cascade amplifier, for described first chopping switch output deviation signal and
Field signal carries out first order amplification；
Described second chopping switch is used for carry out deviation signal and the field signal of first order amplification through described first amplifier
Exchange to described chopping frequency and baseband frequency.
8. Magnetic Sensor integrated circuit according to claim 7 is it is characterised in that described signal processing unit is also included even
It is connected to the second amplifier between described chopper-type amplifier and described low pass filter, described second amplifier is used for process
The deviation signal exchanging and field signal carry out second level amplification.
9. Magnetic Sensor integrated circuit according to claim 7 it is characterised in that described first amplifier export a pair poor
Sub-signal, the later half cycle that described second chopping switch was configured in each clock cycle is defeated to differential signal exchange by this
Go out.
10. Magnetic Sensor integrated circuit according to claim 7 is it is characterised in that described signal processing unit also includes：
It is connected to the sampling hold circuit between described second chopping switch and described low pass filter, described sampling hold circuit
For to each signal in the differential signal after exchanging, gathering respectively within former and later two half periods of each clock cycle
Data is simultaneously divided into two-way sampled signal each to export.
11. Magnetic Sensor integrated circuits according to claim 10 are it is characterised in that described low-pass filter circuit includes
One wave filter, described first wave filter is used for two pairs of sampled signals of described sampling hold circuit output are carried out at addition respectively
Reason, eliminates deviation signal.
12. Magnetic Sensor integrated circuits according to claim 11 are it is characterised in that described low-pass filter circuit also includes
Second wave filter, described second wave filter is used for the differential signal of described first wave filter output is filtered amplifying.
13. Magnetic Sensor integrated circuits according to claim 12 are it is characterised in that described converting unit includes the first ratio
Compared with device, the second comparator and latching logic circuit；Wherein, described first comparator and the second comparator connect a pair of difference respectively
Reference voltage and a pair of differential signal of described low-pass filter circuit output, this of first comparator and the second comparator is to difference
Reference voltage reversal connection；
Wherein, described first comparator is configured to export the voltage signal of described filter circuit output and the ratio of higher thresholds
The magnetic field intensity of relatively result or described external magnetic field and the comparative result of predetermined work point, the second comparator is configured to export institute
State voltage signal and the comparative result of a lower threshold or the magnetic field intensity of external magnetic field and the predetermined release of filter circuit output
The comparative result of point；The comparative result that described latching logic circuit is configured to first comparator represents that filter circuit exports
Voltage signal makes comparison circuit export first when reaching predetermined work point more than the magnetic field intensity of this higher thresholds or external magnetic field
Level, when the comparative result of the second comparator is that the voltage signal representing described filter circuit output is less than this lower threshold or outer
When the magnetic field intensity in portion magnetic field is not up to predetermined point of release, comparison circuit is made to export the second electrical level contrary with the first level, when
The comparative result of described first comparator and the second comparator represents that the voltage signal of filter circuit output is in described higher threshold
Value and lower threshold low between, or represent external magnetic field magnetic field intensity between described operating point and described point of release when, make
The output of comparison circuit keeps former output state constant.
14. Magnetic Sensor integrated circuits according to claim 1 are it is characterised in that described output control circuit includes
One switch and second switch, described first switch and described output port are connected in the first current path, described second switch
It is connected to second current path in opposite direction with described first current path, described first switch and with described output port
Two switches selectively turn under the control of described switching mode detection signal.
15. Magnetic Sensor integrated circuits according to claim 1 are it is characterised in that described output control circuit has certainly
Described output pin flow outwardly electric current the first current path, flow inward into from described output pin electric current second electric current lead to
Road and be connected to switch in described first current path and the one of path of the second current path, described switch is by institute
The magnetic field detection information stating magnetic field detection circuit output controls so that the first current path and the second current path are selectively led
Logical.
16. Magnetic Sensor integrated circuits according to claim 1 are it is characterised in that described magnetic field detection signal is switch
Type detection signal, described input port is used for connecting external ac power source, the switches switching frequency of described switching mode detection signal
The twice of frequency that is proportional to the frequency of described AC power or being equal to described AC power.
A kind of 17. Magnetic Sensor integrated circuits it is characterised in that include for connect external power source input port, output end
Mouthful and magnetic field detection circuit, described magnetic field detection circuit include for perceive external magnetic field and export detection electric signal magnetic strength know
Element, for being amplified disturbing the signal processing unit processing and for will be through described letter to described detection electric signal
The detection electric signal of number processing unit processes is converted to the converting unit of magnetic field detection signal,
Wherein, the detection electric signal of described magnetic induction element output includes field signal and deviation signal, described signal transacting list
Unit includes：
Deviation signal and field signal for exporting described magnetic induction element are separated to the of baseband frequency and chopping frequency
One chopping switch；
Hand over for being amplified to separated deviation signal and field signal and by amplified deviation signal and field signal
Change to the chopper-type amplifier of described chopping frequency and described baseband frequency；And
For eliminating the low-pass filter circuit of the deviation signal exchanging to described chopping frequency.
18. Magnetic Sensor integrated circuits according to claim 17 are it is characterised in that described signal processing unit has power
Profit requires the feature of signal processing unit described in any one of 2-12.
19. Magnetic Sensor integrated circuits according to claim 17 are it is characterised in that also include with described input port even
The rectification circuit connecing, described magnetic field detection circuit is powered by the output voltage of described rectification circuit.
20. Magnetic Sensor integrated circuits as claimed in claim 16 are it is characterised in that described magnetic field detection signal is through described defeated
Exit port outwards exports.
A kind of 21. electric machine assemblies it is characterised in that including motor and motor-drive circuit, described motor-drive circuit have as
The arbitrary described Magnetic Sensor integrated circuit of claim 1 to 20.
A kind of 22. application apparatus with electric machine assembly as claimed in claim 21.
23. application apparatus as claimed in claim 22 it is characterised in that described application apparatus be pump, fan, household electrical appliance or
Person's vehicle.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016114575.0A DE102016114575A1 (en) | 2015-08-07 | 2016-08-05 | Magnetic sensor, integrated circuit and utility device |
| DE202016104333.6U DE202016104333U1 (en) | 2015-08-07 | 2016-08-05 | Magnetic sensor, integrated circuit and utility device |
| KR1020160100236A KR20170017837A (en) | 2015-08-07 | 2016-08-05 | A magnetic sensor and an integrated circuit |
| TW105211941U TWM540312U (en) | 2015-08-07 | 2016-08-05 | Magnetic sensor integrated circuit, motor assembly and application device |
| US15/231,162 US9716453B2 (en) | 2014-08-08 | 2016-08-08 | Magnetic sensor and an integrated circuit |
| BR102016018239A BR102016018239A2 (en) | 2015-08-07 | 2016-08-08 | magnetic sensor, integrated circuit for a magnetic sensor, and motor assembly |
| JP2016155743A JP2017106890A (en) | 2015-08-07 | 2016-08-08 | Magnetic sensor and integrated circuit |
| MX2016010280A MX2016010280A (en) | 2015-08-07 | 2016-08-08 | Magnetic sensor and an integrated circuit. |
| JP2016006006U JP3211140U (en) | 2015-08-07 | 2016-12-15 | Magnetic sensor and integrated circuit |
| US15/625,622 US10469005B2 (en) | 2014-08-08 | 2017-06-16 | Magnetic sensor and an integrated circuit |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2015/086422 WO2016019921A1 (en) | 2014-08-08 | 2015-08-07 | Motor assembly and integrated circuit for motor drive |
| CNPCT/CN2015/086422 | 2015-08-07 | ||
| CN2016102041221 | 2016-04-01 | ||
| CN201610204122 | 2016-04-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106443509A true CN106443509A (en) | 2017-02-22 |
Family
ID=58020481
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610388604.7A Withdrawn CN106443509A (en) | 2014-08-08 | 2016-06-02 | Magnetic sensor integrated circuit, motor assembly, and application equipment |
| CN201620532359.8U Expired - Fee Related CN205982596U (en) | 2015-08-07 | 2016-06-02 | Magnetic sensor integrated circuit , motor element and application apparatus |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620532359.8U Expired - Fee Related CN205982596U (en) | 2015-08-07 | 2016-06-02 | Magnetic sensor integrated circuit , motor element and application apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN106443509A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150313A (en) * | 2018-08-15 | 2019-01-04 | 上海霍普光通信有限公司 | A kind of optical signal transmission method of low rate optical transmitter and receiver |
| CN111835150A (en) * | 2019-04-18 | 2020-10-27 | 日本电产株式会社 | Electric motor |
| CN113155018A (en) * | 2021-04-13 | 2021-07-23 | 西安子国微科技有限公司 | Magnetoelectric angular displacement sensor |
| CN113866634A (en) * | 2021-10-25 | 2021-12-31 | 广州蓝水环境设备科技有限公司 | Motor detection device and method and motor detector |
| WO2023216578A1 (en) * | 2022-05-12 | 2023-11-16 | 江苏多维科技有限公司 | Magnetic switch having filtering function |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109559422B (en) * | 2018-11-22 | 2021-03-09 | 威海华菱光电股份有限公司 | Signal processing method and device for magnetic image sensor, storage medium and processor |
-
2016
- 2016-06-02 CN CN201610388604.7A patent/CN106443509A/en not_active Withdrawn
- 2016-06-02 CN CN201620532359.8U patent/CN205982596U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150313A (en) * | 2018-08-15 | 2019-01-04 | 上海霍普光通信有限公司 | A kind of optical signal transmission method of low rate optical transmitter and receiver |
| CN111835150A (en) * | 2019-04-18 | 2020-10-27 | 日本电产株式会社 | Electric motor |
| CN113155018A (en) * | 2021-04-13 | 2021-07-23 | 西安子国微科技有限公司 | Magnetoelectric angular displacement sensor |
| CN113866634A (en) * | 2021-10-25 | 2021-12-31 | 广州蓝水环境设备科技有限公司 | Motor detection device and method and motor detector |
| WO2023216578A1 (en) * | 2022-05-12 | 2023-11-16 | 江苏多维科技有限公司 | Magnetic switch having filtering function |
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| Publication number | Publication date |
|---|---|
| CN205982596U (en) | 2017-02-22 |
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Application publication date: 20170222 |