CN112327037B - Hall current sensor module - Google Patents

Hall current sensor module Download PDF

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Publication number
CN112327037B
CN112327037B CN202011285710.5A CN202011285710A CN112327037B CN 112327037 B CN112327037 B CN 112327037B CN 202011285710 A CN202011285710 A CN 202011285710A CN 112327037 B CN112327037 B CN 112327037B
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China
Prior art keywords
resistor
hall
current sensor
amplifier
circuit
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CN112327037A (en
Inventor
董文喜
蓝东浩
彭博
唐鹏
曹力研
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Shenzhen Hpmont Technology Co Ltd
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Shenzhen Hpmont Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/04—Housings; Supporting members; Arrangements of terminals
    • G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
    • G01R1/0416—Connectors, terminals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

A Hall current sensor module comprises a PCB board, a signal connection interface to be monitored, at least one Hall current sensor circuit and an external power supply connection end, wherein the signal connection interface is arranged on the PCB board. The signal connection interface to be monitored is used as a signal input end to be monitored of the Hall current sensor module, and comprises a plug-in type interface. The Hall current sensor circuit is used for monitoring one path of signal to be monitored and comprises a Hall device, a filtering amplifying circuit and a monitoring result signal output end, and is used for converting one path of current signal to be monitored, which is input into a signal to be monitored connecting interface, into a linear voltage signal, filtering and amplifying the linear voltage signal, and outputting the linear voltage signal to an IO port of a controller through the monitoring result signal output end so as to be used for the controller to acquire a monitoring result. Because the signal connection interface to be monitored adopts a plug-in type interface, the Hall current sensor circuit is used in a plug-in mode, the maintenance is convenient and easy to replace, and the product design and maintenance cost is reduced.

Description

Hall current sensor module
Technical Field
The invention relates to the technical field of sensors, in particular to a Hall current sensor module.
Background
In a power electronics system, the measurement of current provides the system with the necessary signals for metering, control, relay protection, etc. Therefore, the measurement requirement is high, and high accuracy and stability are required. The current sampling mode of low power mainly adopts an isolation operational amplifier and a Hall current sensor. The isolation operational amplifier has good measurement mode accuracy and stability, so the isolation operational amplifier is widely applied to the power electronic industry, but the primary side and the secondary side of the isolation operational amplifier need to be supplied with power by an independent power supply, so the design requirement on an auxiliary source is higher, meanwhile, the isolation operational amplifier needs to acquire a current signal at an output strong current end and needs to perform certain treatment to send the current signal to IO of a chip, so the isolation operational amplifier needs to consider the requirements of safety and EMC in the PCB design, and further the design cost is improved. When the Hall current sensor is designed on the PCB, the primary side of the Hall current sensor does not need to be supplied with power, so that the design requirement on an auxiliary power supply is reduced. But the PCB layout and routing design of the hall current sensor also take into account the requirements of safety regulations and EMC.
Disclosure of Invention
The invention mainly solves the technical problem of designing a Hall current sensor which meets the requirements of safety regulations and EMC.
According to a first aspect, in one embodiment, a hall current sensor module is provided, including a PCB board, on which a signal connection interface to be monitored, at least one hall current sensor circuit, and an external power connection terminal are disposed;
The signal connection interface to be monitored is used as a signal input end to be monitored of the Hall current sensor module, and comprises a plug-in interface;
Each Hall current sensor circuit is used for monitoring one path of signal to be monitored; the Hall current sensor circuit comprises a Hall device, a filtering amplifying circuit and a monitoring result signal output end; the Hall device is respectively connected with the signal connection interface to be monitored and the filtering amplifying circuit, and is used for converting one path of current signal to be monitored input into the signal connection interface to be monitored into a linear voltage signal and outputting the linear voltage signal to the filtering amplifying circuit; the filtering and amplifying circuit is connected with the monitoring result signal output end and is used for filtering and amplifying the linear voltage signal; the monitoring result signal output end is used for outputting the filtered and amplified linear voltage signal to an IO port of a controller so as to be used for the controller to acquire the monitoring result of the Hall current sensor circuit;
the external power supply connection end is respectively connected with the filtering amplifying circuit of each Hall current sensor circuit and is used for externally connecting the input of a first voltage source and a second voltage source so as to provide the first voltage source and the second voltage source for the filtering amplifying circuit.
In one embodiment, the signal connection interface to be monitored includes a golden finger interface.
In one embodiment, the connector further comprises a first connecting terminal;
The first wiring terminal comprises an external power supply connecting terminal group and a monitoring result signal output terminal group, and the external power supply connecting terminal group is connected with the external power supply connecting end and is used for connecting an external first voltage source and an external second voltage source;
The monitoring result signal output terminal group comprises output connection terminals, the number of which is the same as that of the Hall current sensor circuits, each output connection terminal is connected with one monitoring result signal output end of one Hall current sensor circuit and is used for outputting the linear voltage signals output by the Hall current sensor circuits connected with the output connection terminals to the IO port of the controller.
In an embodiment, the external power supply connection terminal set includes a first external power supply connection terminal, a second power supply connection terminal and a third power supply connection terminal, the first external power supply connection terminal is used for externally connecting a first voltage source, the second external power supply connection terminal is used for externally connecting a second voltage source, and the third connection terminal is used for being connected with the ground of the external power supply.
In one embodiment, the power conversion circuit is connected to the external power connection terminal and the hall device of each hall current sensor circuit, and is used for converting the external first voltage source into a third voltage source and outputting the third voltage source to the hall device of each hall current sensor circuit, so as to provide power for the hall device of each hall current sensor circuit.
In one embodiment, the voltage value of the first voltage source is +15v, the voltage value of the second voltage source is-15V, and the voltage value of the third voltage source is +5v.
In one embodiment, the hall device includes a first connection TP1, a second connection TP2, a third connection TP3, a hall chip HR1, a capacitor C11, a capacitor C12, a capacitor C13, and a resistor R11;
the first connecting end TP1 and the second connecting end TP2 of the Hall device are connected with the signal connection interface to be monitored and are used for inputting a path of signal to be monitored;
The third connecting end TP3 of the Hall device is connected with the filtering amplifying circuit;
The Hall chip HR1 comprises a pin IP1, a pin IP2, a pin IP3, a pin IP4, a pin IP5, a pin IP6, a pin IP7 and a pin IP8; the pin IP1 and the pin IP2 of the Hall chip HR1 are connected with the first connecting end TP1 of the Hall device; the pin IP3 and the pin IP4 of the Hall chip HR1 are connected with the second connecting end TP2 of the Hall device; the pin IP5 of the Hall chip HR1 is used for inputting the third voltage source; a pin IP6 of the Hall chip HR1 is connected with a third connecting end TP3 of the Hall device; pin IP8 of hall chip HR1 is grounded;
the capacitor C11 and the resistor R11 are connected in parallel, one end of the capacitor C11 is connected with the pin IP7 of the Hall chip HR1 after being connected in parallel, and the other end of the capacitor C11 is grounded after being connected in parallel;
the capacitor C12 and the capacitor C13 are connected in parallel, one end of the capacitor C is connected with the pin IP5 of the Hall chip HR1 after being connected in parallel, and the other end of the capacitor C is grounded after being connected in parallel.
In one embodiment, the filter amplification circuit includes an amplification circuit and a filter circuit;
The amplifying circuit comprises an amplifying input end, an amplifying output end, an amplifier U21, an amplifier U22, a resistor R21, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, a capacitor C21 and a capacitor C22;
the amplifying input end of the amplifying circuit is connected with a third connecting end TP3 of the Hall device;
the amplifying output end of the amplifying circuit is connected with the filter circuit;
one end of the resistor R21 is used for inputting the third voltage source, and the other end of the resistor R21 is connected with the negative input end of the amplifier U21;
one end of the resistor R22 is connected with the negative input end of the amplifier U21, and the other end of the resistor R is connected with the output end of the amplifier U21;
one end of the resistor R23 is connected with the positive input end of the amplifier U21, and the other end of the resistor R is grounded;
one end of the resistor R24 is connected with the output end of the amplifier U21, and the other end of the resistor R is connected with the negative input end of the amplifier U22;
the resistor R25 and the resistor R26 are connected in series, one end of the resistor R25 is connected with an amplifying input end of the amplifying circuit in series, and the other end of the resistor R26 is connected with a negative input end of the amplifier U22;
one end of the capacitor C21 and one end of the capacitor C22 are respectively connected with two ends of the resistor R25, and the other end of the capacitor C21 and the other end of the capacitor C22 are grounded;
One end of the resistor R27 is connected with the negative input end of the amplifier U22, and the other end of the resistor R is connected with the output end of the amplifier U22;
One end of the resistor R28 is connected with the positive input end of the amplifier U22, and the other end of the resistor R is grounded;
The positive voltage input end of the amplifier U22 is used for inputting the first voltage source, and the negative voltage input end of the amplifier U22 is used for inputting the second voltage source;
One end of the resistor R29 is connected with the output end of the amplifier U22, and the other end is connected with the amplifying output end of the amplifying circuit.
In one embodiment, the filter circuit includes a filter circuit input, a filter circuit output, an amplifier U31, a resistor R32, a resistor R33, a capacitor C31, and an inductor L1;
the input end of the filter circuit is connected with the amplifying output end of the amplifying circuit;
the output end of the filter circuit is connected with the monitoring result signal output end;
the negative input end of the amplifier U31 is connected with the input end of the filter circuit;
The resistor R31 and the resistor R32 are connected in series, one end of the resistor R31 after being connected in series is connected with the negative input end of the amplifier U31, and the other end of the resistor R32 after being connected in series is connected with the output end of the amplifier U31;
one end of the capacitor C31 is connected with the negative input end of the amplifier U31, and the other end of the capacitor C is connected with the output end of the amplifier U31;
One end of the inductor L31 is connected with the output end of the amplifier U31, and the other end of the inductor L is connected with the output end of the filter circuit;
One end of the capacitor C32 is connected with the output end of the filter circuit, and the other end of the capacitor C is grounded.
In one embodiment, the formula of the value of the linear voltage signal output by the hall current sensor circuit includes:
IU={[(2.5±0.04*IP)*R27*（R26+R25）-1]-(5*R27*R24-1*R22*R21-1)}*(R31+R32)*R29-1;
Wherein I P is a current value of a signal to be monitored inputted to the hall current sensor circuit, and IU is a voltage value of a linear voltage signal outputted from the hall current sensor circuit.
According to the embodiment, the Hall current sensor module comprises a PCB, a signal connection interface to be monitored, at least one Hall current sensor circuit and an external power supply connection end, wherein the signal connection interface is arranged on the PCB. The signal connection interface to be monitored is used as a signal input end to be monitored of the Hall current sensor module, and comprises a plug-in type interface. The Hall current sensor circuit is used for monitoring one path of signal to be monitored and comprises a Hall device, a filtering amplifying circuit and a monitoring result signal output end, and is used for converting one path of current signal to be monitored, which is input into a signal to be monitored connecting interface, into a linear voltage signal, filtering and amplifying the linear voltage signal, and outputting the linear voltage signal to an IO port of a controller through the monitoring result signal output end so as to be used for the controller to acquire a monitoring result. Because the signal connection interface to be monitored adopts a plug-in type interface, the Hall current sensor circuit is used in a plug-in mode, the maintenance is convenient and easy to replace, and the product design and maintenance cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a PCB structure of a Hall current sensor module in one embodiment;
FIG. 2 is a schematic diagram of a first connection terminal structure in an embodiment;
FIG. 3 is a schematic diagram of a Hall current sensor circuit in one embodiment;
FIG. 4 is a schematic diagram of the circuit connections of a Hall device in one embodiment;
FIG. 5 is a schematic diagram of the connections of an amplifying circuit in one embodiment;
FIG. 6 is a schematic diagram showing the connection of a filter circuit in an embodiment.
Detailed Description
The application will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, related operations of the present application have not been shown or described in the specification in order to avoid obscuring the core portions of the present application, and may be unnecessary to persons skilled in the art from a detailed description of the related operations, which may be presented in the description and general knowledge of one skilled in the art.
Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.
In the embodiment of the invention, as the signal connection interface to be monitored of the Hall current sensor module adopts the plug-in interface, the packaged Hall current sensor circuit is directly inserted on the PCB, so that the Hall current sensor module is convenient to maintain and easy to replace like a common plug-in, and further the design and maintenance cost of the product is greatly reduced.
Embodiment one:
Please refer to fig. 1, which is a schematic diagram of a PCB structure of a hall current sensor module in an embodiment, the hall current sensor module includes a PCB board 1, and a signal connection interface 2 to be monitored, at least one hall current sensor circuit 3 and an external power connection terminal are disposed on the PCB board 1. The signal connection interface 2 to be monitored is used as a signal input end to be monitored of the Hall current sensor module, and the signal connection interface 2 to be monitored comprises a plug-in type interface. Each hall current sensor circuit 3 is used for monitoring one path of signal to be monitored. The hall current sensor circuit 3 includes a hall device 31, a filter amplifier circuit 32, and a monitoring result signal output terminal. The hall device 31 is respectively connected with the signal connection interface 2 to be monitored and the filter amplifying circuit 32, and is used for converting one path of current signal to be monitored input into the signal connection interface 2 to be monitored into a linear voltage signal and outputting the linear voltage signal to the filter amplifying circuit 32. The filter amplifier circuit 32 is connected to the monitor result signal output terminal for filtering and amplifying the linear voltage signal. The monitoring result signal output end is used for outputting the filtered and amplified linear voltage signal to an IO port of a controller so as to be used for the controller to acquire the monitoring result of the Hall current sensor circuit. The external power supply connection end is respectively connected with the filter amplifying circuit of each Hall current sensor circuit 3 and is used for externally connecting the input of the first voltage source and the second voltage source so as to provide the first voltage source and the second voltage source for the filter amplifying circuit. In one embodiment, the signal connection interface 2 to be monitored includes a golden finger interface. In an embodiment, the hall current sensor module further includes a first connection terminal 4, where the first connection terminal 4 includes an external power supply connection terminal set and a monitoring result signal output terminal set, and the external power supply connection terminal set is connected with an external power supply connection end and is used to connect an external first voltage source and an external second voltage source. The monitoring result signal output terminal group comprises output connection terminals, the number of which is the same as that of the Hall current sensor circuits, each output connection terminal is connected with the monitoring result signal output end of one Hall current sensor circuit 3 and is used for outputting linear voltage signals output by the Hall current sensor circuits 3 connected with the output connection terminals to the IO port of the controller.
Referring to fig. 2, a schematic structural diagram of a first connection terminal in an embodiment is shown, in an embodiment, an external power connection terminal set of the first connection terminal 4 includes a first external power connection terminal, a second power connection terminal and a third power connection terminal, the first external power connection terminal is used for externally connecting a first voltage source, the second external power connection terminal is used for externally connecting a second voltage source, and the third connection terminal is used for being connected with a ground of an external power source. In one embodiment, the voltage value of the first voltage source is +15V, and the voltage value of the second voltage source is-15V. The monitoring result signal output terminal group comprises an output connection terminal U1, an output connection terminal U2 and an output connection terminal U3, and the monitoring result signal output terminals of the three-way Hall current sensor circuit are respectively connected.
In one embodiment, the hall current sensor module further includes a power conversion circuit 5 connected to the external power connection terminal and the hall device of each hall current sensor circuit 3, for converting the external first voltage source into a third voltage source and outputting the third voltage source to the hall device 31 of each hall current sensor circuit 3, so as to provide power for the hall device 31 of each hall current sensor circuit 3. In one embodiment, the voltage value of the third voltage source is +5v.
Referring to fig. 3, a schematic structural diagram of a hall current sensor circuit in an embodiment includes a hall device 31 and a filter amplifier circuit 32, where the filter amplifier circuit 32 includes an amplifier circuit 321 and a filter circuit 322.
Referring to fig. 4, a schematic circuit diagram of a hall device according to an embodiment is shown, and the hall device 31 includes a first connection terminal TP1, a second connection terminal TP2, a third connection terminal TP3, a hall chip HR1, a capacitor C11, a capacitor C12, a capacitor C13, and a resistor R11. The first connecting end TP1 and the second connecting end TP2 of the hall device 31 are connected with a signal connection interface to be monitored, and are used for inputting a signal to be monitored. The third connection terminal TP3 of the hall device 31 is connected to the filter amplifier circuit 32. Hall chip HR1 includes pin IP1, pin IP2, pin IP3, pin IP4, pin IP5, pin IP6, pin IP7, and pin IP8. Pins IP1 and IP2 of hall chip HR1 are connected to first connection terminal TP1 of hall device 31. Pin IP3 and pin IP4 of hall chip HR1 are connected to second connection terminal TP2 of hall device 31. Pin IP5 of Hall chip HR1 is used for the input of the third voltage source. Pin IP6 of hall chip HR1 is connected to third connection terminal TP3 of hall device 31. Pin IP8 of Hall chip HR1 is grounded. The capacitor C11 and the resistor R11 are connected in parallel, one end of the capacitor C11 is connected with the pin IP7 of the Hall chip HR1 after being connected in parallel, and the other end of the capacitor C11 is grounded after being connected in parallel. The capacitor C12 and the capacitor C13 are connected in parallel, one end of the capacitor C is connected with the pin IP5 of the Hall chip HR1 after being connected in parallel, and the other end of the capacitor C is grounded after being connected in parallel.
Referring to fig. 5, an amplifying circuit in an embodiment includes an amplifying input terminal, an amplifying output terminal, an amplifier U21, an amplifier U22, a resistor R21, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, a capacitor C21, and a capacitor C22. The amplification input terminal of the amplification circuit 321 is connected to the third connection terminal TP3 of the hall device 31. An amplification output terminal of the amplification circuit 321 is connected to the filter circuit 322. One end of the resistor R21 is used for the input of the third voltage source, and the other end is connected with the negative input end of the amplifier U21. One end of the resistor R22 is connected to the negative input terminal of the amplifier U21, and the other end is connected to the output terminal of the amplifier U21. One end of the resistor R23 is connected to the positive input terminal of the amplifier U21, and the other end is grounded. One end of the resistor R24 is connected to the output terminal of the amplifier U21, and the other end is connected to the negative input terminal of the amplifier U22. The resistor R25 and the resistor R26 are connected in series, one end of the series is connected with the amplifying input end of the amplifying circuit 321, and the other end of the series is connected with the negative input end of the amplifier U22. One end of the capacitor C21 and one end of the capacitor C22 are respectively connected to two ends of the resistor R25, and the other end of the capacitor C21 and the other end of the capacitor C22 are grounded. One end of the resistor R27 is connected to the negative input terminal of the amplifier U22, and the other end is connected to the output terminal of the amplifier U22. One end of the resistor R28 is connected to the positive input terminal of the amplifier U22, and the other end is grounded. The voltage positive input of the amplifier U22 is used for the input of the first voltage source and the voltage negative input of the amplifier U22 is used for the input of the second voltage source. One end of the resistor R29 is connected to the output terminal of the amplifier U22, and the other end is connected to the amplification output terminal of the amplification circuit 321.
Referring to fig. 6, a schematic diagram of a connection of a filter circuit in an embodiment, the filter circuit 322 includes a filter circuit input terminal, a filter circuit output terminal, an amplifier U31, a resistor R32, a resistor R33, a capacitor C31, and an inductor L1. The filter circuit input is connected to the amplification output of the amplification circuit 321. The output end of the filter circuit is connected with the output end of the monitoring result signal. The negative input of the amplifier U31 is connected to the input of the filter circuit 322. The resistor R31 and the resistor R32 are connected in series, one end of the resistor R31 after the series connection is connected with the negative input end of the amplifier U31, and the other end of the resistor R32 after the series connection is connected with the output end of the amplifier U31. One end of the capacitor C31 is connected to the negative input terminal of the amplifier U31, and the other end is connected to the output terminal of the amplifier U31. One end of the inductor L31 is connected with the output end of the amplifier U31, and the other end of the inductor L is connected with the output end of the filter circuit. One end of the capacitor C32 is connected with the output end of the filter circuit, and the other end of the capacitor C is grounded.
In one embodiment, the equation for the value of the linear voltage signal output by the hall current sensor circuit includes:
IU={[(2.5±0.04*IP)*R27*（R26+R25）-1]-(5*R27*R24-1*R22*R21-1)}*(R31+R32)*R29-1;
Wherein I P is a current value of a signal to be monitored inputted to the hall current sensor circuit, and IU is a voltage value of a linear voltage signal outputted from the hall current sensor circuit.
In an embodiment of the application, a modularized Hall current sensor module is designed, a patch Hall and a filtering amplifying circuit are further packaged, strong and weak currents can be well layered during module design, so that the interference resistance of a current signal adopted is strong, the design difficulty of a PCB is reduced, and the packaged Hall current sensor module is directly inserted on the PCB, so that the maintenance is convenient and easy to replace like a common plug-in unit, and further the product design and maintenance cost is greatly reduced.
In an embodiment, the hall current sensor module comprises a PCB board, a signal connection interface to be monitored, at least one hall current sensor circuit and an external power supply connection end, wherein the signal connection interface to be monitored is arranged on the PCB board. The signal connection interface to be monitored is used as a signal input end to be monitored of the Hall current sensor module, and comprises a plug-in type interface. The Hall current sensor circuit is used for monitoring one path of signal to be monitored and comprises a Hall device, a filtering amplifying circuit and a monitoring result signal output end, and is used for converting one path of current signal to be monitored, which is input into a signal to be monitored connecting interface, into a linear voltage signal, filtering and amplifying the linear voltage signal, and outputting the linear voltage signal to an IO port of a controller through the monitoring result signal output end so as to be used for the controller to acquire a monitoring result. Because the signal connection interface to be monitored adopts a plug-in type interface, the Hall current sensor circuit is used in a plug-in mode, the maintenance is convenient and easy to replace, and the product design and maintenance cost is reduced.
The foregoing description of the invention has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the invention pertains, based on the idea of the invention.

Claims (6)

1. The Hall current sensor module is characterized by comprising a PCB, wherein a signal connection interface to be monitored, at least one Hall current sensor circuit and an external power supply connection end are arranged on the PCB;
The signal connection interface to be monitored is used as a signal input end to be monitored of the Hall current sensor module, and comprises a plug-in interface;
Each Hall current sensor circuit is used for monitoring one path of signal to be monitored; the Hall current sensor circuit comprises a Hall device, a filtering amplifying circuit and a monitoring result signal output end; the Hall device is respectively connected with the signal connection interface to be monitored and the filtering amplifying circuit, and is used for converting one path of current signal to be monitored input into the signal connection interface to be monitored into a linear voltage signal and outputting the linear voltage signal to the filtering amplifying circuit; the filtering and amplifying circuit is connected with the monitoring result signal output end and is used for filtering and amplifying the linear voltage signal; the monitoring result signal output end is used for outputting the filtered and amplified linear voltage signal to an IO port of a controller so as to be used for the controller to acquire the monitoring result of the Hall current sensor circuit;
The external power supply connection end is respectively connected with the filtering and amplifying circuit of each Hall current sensor circuit and is used for externally connecting the input of a first voltage source and a second voltage source so as to provide the first voltage source and the second voltage source for the filtering and amplifying circuit;
The signal connection interface to be monitored comprises a golden finger interface;
the Hall current sensor module further comprises a first wiring terminal;
The first wiring terminal comprises an external power supply connecting terminal group and a monitoring result signal output terminal group, and the external power supply connecting terminal group is connected with the external power supply connecting end and is used for connecting an external first voltage source and an external second voltage source;
The monitoring result signal output terminal group comprises output connection terminals the same as the Hall current sensor circuits in number, and each output connection terminal is connected with the monitoring result signal output end of one Hall current sensor circuit and is used for outputting the linear voltage signals output by the Hall current sensor circuit connected with the output connection terminal to the IO port of the controller;
The external power supply connecting terminal group comprises a first external power supply connecting terminal, a second external power supply connecting terminal and a third external power supply connecting terminal, wherein the first external power supply connecting terminal is used for externally connecting a first voltage source, the second external power supply connecting terminal is used for externally connecting a second voltage source, and the third external power supply connecting terminal is used for being connected with the ground of an external power supply;
The Hall current sensor module further comprises a power supply conversion circuit which is respectively connected with the external power supply connection end and the Hall devices of each Hall current sensor circuit and used for converting an external first voltage source into a third voltage source and outputting the third voltage source to the Hall devices of each Hall current sensor circuit so as to provide power for the Hall devices of each Hall current sensor circuit.
2. The hall current sensor module of claim 1, wherein the voltage value of the first voltage source is +15v, the voltage value of the second voltage source is-15V, and the voltage value of the third voltage source is +5v.
3. The hall current sensor module of claim 1, wherein the hall device comprises a first connection TP1, a second connection TP2, a third connection TP3, a hall chip HR1, a capacitor C11, a capacitor C12, a capacitor C13, and a resistor R11;
the first connecting end TP1 and the second connecting end TP2 of the Hall device are connected with the signal connection interface to be monitored and are used for inputting a path of signal to be monitored;
The third connecting end TP3 of the Hall device is connected with the filtering amplifying circuit;
The Hall chip HR1 comprises a pin IP1, a pin IP2, a pin IP3, a pin IP4, a pin IP5, a pin IP6, a pin IP7 and a pin IP8; the pin IP1 and the pin IP2 of the Hall chip HR1 are connected with the first connecting end TP1 of the Hall device; the pin IP3 and the pin IP4 of the Hall chip HR1 are connected with the second connecting end TP2 of the Hall device; the pin IP5 of the Hall chip HR1 is used for inputting the third voltage source; a pin IP6 of the Hall chip HR1 is connected with a third connecting end TP3 of the Hall device; pin IP8 of hall chip HR1 is grounded;
the capacitor C11 and the resistor R11 are connected in parallel, one end of the capacitor C11 is connected with the pin IP7 of the Hall chip HR1 after being connected in parallel, and the other end of the capacitor C11 is grounded after being connected in parallel;
the capacitor C12 and the capacitor C13 are connected in parallel, one end of the capacitor C is connected with the pin IP5 of the Hall chip HR1 after being connected in parallel, and the other end of the capacitor C is grounded after being connected in parallel.
4. The hall current sensor module of claim 3, wherein the filter amplification circuit comprises an amplification circuit and a filter circuit;
The amplifying circuit comprises an amplifying input end, an amplifying output end, an amplifier U21, an amplifier U22, a resistor R21, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, a capacitor C21 and a capacitor C22;
the amplifying input end of the amplifying circuit is connected with a third connecting end TP3 of the Hall device;
the amplifying output end of the amplifying circuit is connected with the filter circuit;
one end of the resistor R21 is used for inputting the third voltage source, and the other end of the resistor R21 is connected with the negative input end of the amplifier U21;
one end of the resistor R22 is connected with the negative input end of the amplifier U21, and the other end of the resistor R is connected with the output end of the amplifier U21;
one end of the resistor R23 is connected with the positive input end of the amplifier U21, and the other end of the resistor R is grounded;
one end of the resistor R24 is connected with the output end of the amplifier U21, and the other end of the resistor R is connected with the negative input end of the amplifier U22;
the resistor R25 and the resistor R26 are connected in series, one end of the resistor R25 is connected with an amplifying input end of the amplifying circuit in series, and the other end of the resistor R26 is connected with a negative input end of the amplifier U22;
one end of the capacitor C21 and one end of the capacitor C22 are respectively connected with two ends of the resistor R25, and the other end of the capacitor C21 and the other end of the capacitor C22 are grounded;
One end of the resistor R27 is connected with the negative input end of the amplifier U22, and the other end of the resistor R is connected with the output end of the amplifier U22;
One end of the resistor R28 is connected with the positive input end of the amplifier U22, and the other end of the resistor R is grounded;
The positive voltage input end of the amplifier U22 is used for inputting the first voltage source, and the negative voltage input end of the amplifier U22 is used for inputting the second voltage source;
One end of the resistor R29 is connected with the output end of the amplifier U22, and the other end is connected with the amplifying output end of the amplifying circuit.
5. The hall current sensor module of claim 4, wherein the filter circuit comprises a filter circuit input, a filter circuit output, an amplifier U31, a resistor R32, a resistor R33, a capacitor C31, and an inductance L1;
the input end of the filter circuit is connected with the amplifying output end of the amplifying circuit;
the output end of the filter circuit is connected with the monitoring result signal output end;
the negative input end of the amplifier U31 is connected with the input end of the filter circuit;
The resistor R31 and the resistor R32 are connected in series, one end of the resistor R31 after being connected in series is connected with the negative input end of the amplifier U31, and the other end of the resistor R32 after being connected in series is connected with the output end of the amplifier U31;
one end of the capacitor C31 is connected with the negative input end of the amplifier U31, and the other end of the capacitor C is connected with the output end of the amplifier U31;
One end of the inductor L31 is connected with the output end of the amplifier U31, and the other end of the inductor L is connected with the output end of the filter circuit;
One end of the capacitor C32 is connected with the output end of the filter circuit, and the other end of the capacitor C is grounded.
6. The hall current sensor module of claim 5, wherein the formula for the value of the linear voltage signal output by the hall current sensor circuit comprises:
IU={[(2.5±0.04*IP)*R27*(R26+R25)-1]-(5*R27*R24-1*R22*R21-1)}*(R31+R32)*R29-1;
Wherein I P is a current value of a signal to be monitored inputted to the hall current sensor circuit, and IU is a voltage value of a linear voltage signal outputted from the hall current sensor circuit.
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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201589805U (en) * 2009-12-24 2010-09-22 天津华云自控股份有限公司 Signal detection circuit of current hall sensor
CN103197178A (en) * 2013-03-21 2013-07-10 辽宁省电力有限公司电力科学研究院 Device and method of on-line monitoring of transformer direct current magnetic bias
CN203337715U (en) * 2013-06-29 2013-12-11 西安科技大学 Hall current sensor-based cable current detection circuit
CN203365535U (en) * 2013-06-18 2013-12-25 北汽福田汽车股份有限公司 Vehicle current collection system and car having same
CN203705533U (en) * 2013-11-08 2014-07-09 合肥国轩高科动力能源股份公司 Current detection circuit of Hall current sensor of electric automobile
CN204556721U (en) * 2015-04-30 2015-08-12 西安科技大学 A kind of harmonic detecting signal acquisition circuit
CN205844390U (en) * 2015-11-05 2016-12-28 上唐投资有限公司 A kind of motor of electric motor car stator line current detection device
GB201711940D0 (en) * 2017-07-25 2017-09-06 Quepal Ltd A circuit for reducing radio frequency interference
CN108181351A (en) * 2017-12-30 2018-06-19 北方工业大学 Portable water quality monitoring parameter voltage/current signal processing circuit
CN108267621A (en) * 2018-03-22 2018-07-10 广东电网有限责任公司清远供电局 A kind of jaw type current measurer based on Hall element
CN108761173A (en) * 2018-08-31 2018-11-06 绵阳市维博电子有限责任公司 One kind being based on new-energy automobile inverter current detecting sensor
CN110190837A (en) * 2019-06-24 2019-08-30 镇江英创电力电子有限公司 A kind of isolated amplifier device
CN110763910A (en) * 2019-11-11 2020-02-07 绵阳市维博电子有限责任公司 Digital display DC meter and current sampling circuit thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009537036A (en) * 2006-05-12 2009-10-22 エヌエックスピー ビー ヴィ Current interface with blocking capacitor connected to additional pin
DE102015222570B4 (en) * 2015-11-16 2024-04-11 Dialog Semiconductor (Uk) Limited CIRCUIT AND METHOD FOR HIGH ACCURACY CURRENT MEASUREMENT
US10697802B2 (en) * 2018-05-14 2020-06-30 Infineon Technologies Ag Sensor device and a method of current modulation switching using a two-wire current interface

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201589805U (en) * 2009-12-24 2010-09-22 天津华云自控股份有限公司 Signal detection circuit of current hall sensor
CN103197178A (en) * 2013-03-21 2013-07-10 辽宁省电力有限公司电力科学研究院 Device and method of on-line monitoring of transformer direct current magnetic bias
CN203365535U (en) * 2013-06-18 2013-12-25 北汽福田汽车股份有限公司 Vehicle current collection system and car having same
CN203337715U (en) * 2013-06-29 2013-12-11 西安科技大学 Hall current sensor-based cable current detection circuit
CN203705533U (en) * 2013-11-08 2014-07-09 合肥国轩高科动力能源股份公司 Current detection circuit of Hall current sensor of electric automobile
CN204556721U (en) * 2015-04-30 2015-08-12 西安科技大学 A kind of harmonic detecting signal acquisition circuit
CN205844390U (en) * 2015-11-05 2016-12-28 上唐投资有限公司 A kind of motor of electric motor car stator line current detection device
GB201711940D0 (en) * 2017-07-25 2017-09-06 Quepal Ltd A circuit for reducing radio frequency interference
CN108181351A (en) * 2017-12-30 2018-06-19 北方工业大学 Portable water quality monitoring parameter voltage/current signal processing circuit
CN108267621A (en) * 2018-03-22 2018-07-10 广东电网有限责任公司清远供电局 A kind of jaw type current measurer based on Hall element
CN108761173A (en) * 2018-08-31 2018-11-06 绵阳市维博电子有限责任公司 One kind being based on new-energy automobile inverter current detecting sensor
CN110190837A (en) * 2019-06-24 2019-08-30 镇江英创电力电子有限公司 A kind of isolated amplifier device
CN110763910A (en) * 2019-11-11 2020-02-07 绵阳市维博电子有限责任公司 Digital display DC meter and current sampling circuit thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Hall-Effect Current Sensors Susceptibility to EMI: Experimental Study;Orazio Aiello;Electronics,;20191231;全文 *
多路可控可监测稳压电源的设计;郝晓鹏;甄国涌;焦新泉;;自动化与仪表;20101115(11);全文 *

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