CN109375118A - Current measuring device and current measurement system - Google Patents
Current measuring device and current measurement system Download PDFInfo
- Publication number
- CN109375118A CN109375118A CN201811195271.1A CN201811195271A CN109375118A CN 109375118 A CN109375118 A CN 109375118A CN 201811195271 A CN201811195271 A CN 201811195271A CN 109375118 A CN109375118 A CN 109375118A
- Authority
- CN
- China
- Prior art keywords
- inductance
- measured
- output unit
- unit
- square wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
Current measuring device and current measurement system provided by the invention, are related to inductive current field of measuring technique.Wherein, current measuring device includes: square wave output unit；Power output unit, the input terminal of the power output unit connect with the output end of square wave output unit, output end and inductance connection to be measured, square-wave voltage is exported to inductance to be measured with the square-wave signal exported based on square wave output unit, is gradually increased with flowing through the electric current of inductance to be measured；Measuring unit, the measuring unit and the inductance connection to be measured flow through the value of the electric current of the inductance to be measured at various moments to detect, and electric current is issued to when being mutated corresponding current value as the saturation current value of the inductance to be measured.Power output unit has capacitive load, carries out charge/discharge operation with the effect based on square-wave voltage, and improves during charge and discharge and flow through the rate that the electric current of inductance to be measured increases.By above-mentioned setting, quickly and efficiently the saturation current of inductance can be measured.
Description
Technical field
The present invention relates to inductive current field of measuring technique, survey in particular to a kind of current measuring device and electric current
Amount system.
Background technique
Power supply is the operation power of various kinds of equipment, and various energy storage inductors can be used on power supply, for example, DC-DC
Outputting inductance in power module.Wherein, due to the presence of the current effect of inductance, so that inductance must be noted that electricity in use
The size of the saturation current value of sense.With the increase of the electric current by inductance, the inductance of inductance can reduce, if inductance subtracts
Much smaller, DC-DC direct current transducer would not work normally, and can this will seriously affect equipment and normally work.
Therefore, the size for studying the saturation current value of DC-DC outputting inductance just seems most important.It is first in DC-DC design
Stage beginning carries out type selecting to inductance and accurately tests out the size of the saturation current value of inductance used, can significantly arrange
Except inductance parameters bring perplexs, guarantee is provided for the safe and reliable operation of system.Therefore it provides one kind can quickly, have
The technology that effect ground measures the saturation current of inductance is a technical problem to be solved urgently.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of current measuring device and current measurement system, with quickly, have
Effect ground measures the saturation current of inductance.
To achieve the above object, the embodiment of the present invention adopts the following technical scheme that
A kind of current measuring device is tested for the saturation current to inductance to be measured, the current measuring device packet
It includes:
Power supply unit；
The feeder ear of square wave output unit, the square wave output unit is connect with said supply unit；
Power output unit, the feeder ear of the power output unit connect with said supply unit, input terminal and the side
Output end connection, output end and the inductance connection to be measured of wave output unit, with what is exported based on the square wave output unit
Square-wave signal exports square-wave voltage to the inductance to be measured, is gradually increased with flowing through the electric current of the inductance to be measured；
Measuring unit, the measuring unit and the inductance connection to be measured, to detect the electric current for flowing through the inductance to be measured each
The value at a moment, and electric current is issued to when being mutated corresponding current value as the saturation current value of the inductance to be measured；
Wherein, the power output unit has capacitive load, to carry out charge and discharge based on the effect of the square-wave voltage
Work, and improved during charge and discharge and flow through the rate that the electric current of the inductance to be measured increases, to shorten electric current sending
The time of mutation.
In the embodiment of the present invention preferably selects, in above-mentioned current measuring device, the power output unit includes:
First metal-oxide-semiconductor, the grid of first metal-oxide-semiconductor connect with the output end of the square wave output unit, drain with it is described
Power supply unit connection, source electrode are connect with the first end of the inductance to be measured；
Second metal-oxide-semiconductor, the grid of second metal-oxide-semiconductor connect with the output end of the square wave output unit, drain with it is described
The first end connection of inductance to be measured, source electrode ground connection；
First capacitive load, one end of first capacitive load connect with the second end of the inductance to be measured, another termination
Ground；
Second capacitive load, the drain electrode connection, the other end and institute of one end of second capacitive load and first metal-oxide-semiconductor
State the second end connection of inductance to be measured.
In the embodiment of the present invention preferably selects, in above-mentioned current measuring device, the power output unit is also wrapped
It includes:
First resistor, the first resistor are connected in series in the grid and the square wave output unit of first metal-oxide-semiconductor
Between output end；
Second resistance, the second resistance are connected in series in the grid and the square wave output unit of second metal-oxide-semiconductor
Between output end.
In the embodiment of the present invention preferably selects, in above-mentioned current measuring device, the measuring unit includes:
3rd resistor, one end of the 3rd resistor connect with the second end of the inductance to be measured, the other end respectively with it is described
First capacitive load is connected with second capacitive load, so that first capacitive load passes through with second capacitive load
The 3rd resistor and the inductance connection to be measured；
Voltage detector, the voltage detector is in parallel with the 3rd resistor, to acquire the electricity at the 3rd resistor both ends
Pressure, and the electric current of the 3rd resistor will be flowed through as the saturation current of the inductance to be measured when the voltage mutates.
In the embodiment of the present invention preferably selects, in above-mentioned current measuring device, said supply unit includes:
First DC output unit, first DC output unit are connect with the feeder ear of the square wave output unit, with
A direct current is provided to the square wave output unit；
Second DC output unit, second DC output unit are connect with the feeder ear of the power output unit, with
A direct current is provided to the square wave output unit.
In the embodiment of the present invention preferably selects, in above-mentioned current measuring device, first DC output unit
Output voltage be 12V, the output voltage of second DC output unit is 100V.
In the embodiment of the present invention preferably selects, in above-mentioned current measuring device, the square wave output unit includes:
Square wave controls administrative unit, and the feeder ear of square wave control administrative unit is connect with said supply unit；
Power drive unit, the feeder ear of the power drive unit connect with said supply unit, input terminal and the side
The output end connection of wave control administrative unit, output end are connect with the input terminal of the power output unit, to be based on the side
The square-wave signal that wave controls administrative unit output controls the power output unit and exports square-wave voltage to the inductance to be measured.
In the embodiment of the present invention preferably selects, in above-mentioned current measuring device, the square wave controls administrative unit
It is made of pwm chip, resistive element and capacity cell, the power drive unit is by driving chip, resistive element, electricity
Hold element and diode element composition.
In the embodiment of the present invention preferably selects, in above-mentioned current measuring device, the model of the pwm chip
For KA3525, the model IR2110 of driving chip.
The embodiment of the invention also provides a kind of current measurement system, including inductance to be measured and for measuring the inductance to be measured
Saturation current current measuring device, which includes:
Power supply unit；
The feeder ear of square wave output unit, the square wave output unit is connect with said supply unit；
Power output unit, the feeder ear of the power output unit connect with said supply unit, input terminal and the side
Output end connection, output end and the inductance connection to be measured of wave output unit, with what is exported based on the square wave output unit
Square-wave signal exports square-wave voltage to the inductance to be measured, is gradually increased with flowing through the electric current of the inductance to be measured；
Measuring unit, the measuring unit and the inductance connection to be measured, to detect the electric current for flowing through the inductance to be measured each
The value at a moment, and electric current is issued to when being mutated corresponding current value as the saturation current value of the inductance to be measured；
Wherein, the power output unit has capacitive load, to carry out charge and discharge based on the effect of the square-wave voltage
Work, and improved during charge and discharge and flow through the rate that the electric current of the inductance to be measured increases, to shorten electric current sending
The time of mutation.
Current measuring device and current measurement system provided by the invention pass through power supply unit, square wave output unit, power
Output unit and measuring unit are equipped with, and capacitive load is arranged in power output unit, with negative based on the capacitive
Be loaded in charge and discharge process improve flow through the inductance to be measured electric current increase rate, with shorten the electric current issue mutation when
Between, and then quickly and efficiently the saturation current of inductance is measured, there is high practical value.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
Fig. 1 is the structural block diagram of current measurement system provided in an embodiment of the present invention.
Fig. 2 is the circuit diagram of current measuring device provided in an embodiment of the present invention.
Fig. 3 is the structural block diagram of current measuring device provided in an embodiment of the present invention.
Fig. 4 is the circuit diagram that square wave provided in an embodiment of the present invention controls administrative unit.
Fig. 5 is the circuit diagram of power drive unit provided in an embodiment of the present invention.
Icon: 100- current measuring device；110- power supply unit；The first DC output unit of 111-；The second direct current of 113-
Output unit；130- square wave output unit；131- square wave controls administrative unit；U1-PWM controls chip；133- power drive list
Member；U2- driving chip；150- power output unit；The first metal-oxide-semiconductor of Q1-；The second metal-oxide-semiconductor of Q2-；The first capacitive load of C1-；C2-
Second capacitive load；R1- first resistor；R2- second resistance；170- measuring unit；R3- 3rd resistor；OSC- voltage detector；
200- inductance to be measured.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment only
It is a part of the embodiments of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings
The component of embodiment can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.In description of the invention
In, term " first ", " second ", " third ", " the 4th " etc. are only used for distinguishing description, and should not be understood as only or imply opposite
Importance.
In the description of the present invention unless specifically defined or limited otherwise, term " setting ", " connected ", " connection " are answered
It is interpreted broadly, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The connection in portion.For the ordinary skill in the art, the tool of above-mentioned term in the present invention can be understood with concrete condition
Body meaning.
As shown in Figure 1, may include current measuring device 100 the embodiment of the invention provides a kind of current measurement system
With inductance 200 to be measured.Wherein, the current measuring device 100 is connect with the inductance 200 to be measured, to the inductance to be measured
200 electric current is tested, with the current value under obtaining the inductance 200 to be measured at various moments, and when electric current is mutated
Saturation current value of the current value as the inductance 200 to be measured, and then complete the survey to the saturation current of the inductance 200 to be measured
Amount.
In conjunction with Fig. 2, the embodiment of the present invention also provides a kind of current measuring device that can be applied to above-mentioned current measurement system
100.Wherein, the current measuring device 100 may include power supply unit 110, square wave output unit 130, power output unit
150 and measuring unit 170.
In detail, the feeder ear of the square wave output unit 130 is connect with said supply unit 110, to obtain the confession
The electric energy that electric unit 110 exports, and can generate and export square-wave signal.The feeder ear of the power output unit 150 and institute
State the connection of power supply unit 110, input terminal is connect with the output end of the square wave output unit 130, output end and the electricity to be measured
200 connection of sense, with the electric energy of square-wave signal and said supply unit 110 output exported based on the square wave output unit 130
Square-wave voltage is exported to the inductance to be measured 200 of the current measurement system, to flow through the electric current of the inductance to be measured 200 gradually
Increase.The measuring unit 170 is connect with the inductance 200 to be measured, to detect the electric current for flowing through the inductance 200 to be measured each
The value at moment, and electric current is issued to when being mutated corresponding current value as the saturation current value of the inductance 200 to be measured.
Wherein, the power output unit 150 has capacitive load, to carry out charge and discharge based on the effect of the square-wave voltage
Electricity work, and improved during charge and discharge and flow through the rate that the electric current of the inductance to be measured 200 increases, to shorten the electric current
Issue the time of mutation.That is, by the charge and discharge of the capacitive load one can be provided to the inductance 200 to be measured
Voltage with high current value, to accelerate the inductance 200 to be measured to carry out saturation region, and then quickly and efficiently to the inductance to be measured
200 saturation current measures.
Optionally, the composition of said supply unit 110 is unrestricted, can be configured according to practical application request, example
Such as, different selections can be had according to the voltage requirements difference of power supply.In the present embodiment, in conjunction with Fig. 3, it is contemplated that the power supply
Unit 110 needs to provide the electric energy of different voltages value to the square wave output unit 130 and the power output unit 150, because
This, said supply unit 110 may include the first DC output unit 111 and the second DC output unit 113.
In detail, first DC output unit 111 can be connect with the feeder ear of the square wave output unit 130,
To provide a direct current to the square wave output unit 130.Second DC output unit 113 can be with the power output
The feeder ear of unit 150 connects, to provide a direct current to the square wave output unit 130.Also, first direct current output
The voltage that unit 111 provides is different from the voltage that second DC output unit 113 provides, to export respectively to the square wave
The electric energy of unit 130 and the power output unit 150 output different voltages value.
Wherein, the output of the output voltage of first DC output unit 111 and second DC output unit 113
The specific size of voltage is unrestricted, can be configured according to practical application request.In the present embodiment, to guarantee to have
Effect ground drives the square wave output unit 130 and the inductance to be measured 200, the output electricity of first DC output unit 111
Pressure can be 12V, and the output voltage of second DC output unit 113 can be 100V.
Optionally, the composition of the square wave output unit 130 is unrestricted, can be set according to practical application request
It sets, for example, can be configured according to the validity driven to the power output unit 150.In the present embodiment, in conjunction with figure
4 and Fig. 5, the square wave output unit 130 may include square wave control administrative unit 131 and power drive unit 133.
In detail, (such as the first direct current is defeated with said supply unit 110 for the feeder ear of the square wave control administrative unit 131
Unit 111 out) connection, to obtain the electric energy of said supply unit 110 (such as the first DC output unit 111) output and export one
Square-wave signal.The feeder ear and said supply unit 110 (such as the first DC output unit 111) of the power drive unit 133
Connection, input terminal and the square wave control administrative unit 131 output end connect, output end and the power output unit 150
Input terminal connection, the power output unit is controlled with the square-wave signal exported based on square wave control administrative unit 131
150 export square-wave voltage to the inductance 200 to be measured.
Optionally, the number amount and type for the electrical component that square wave control administrative unit 131 includes are unrestricted, can be with
It is configured according to practical application request, as long as can effectively generate and export square-wave signal.In the present embodiment, it ties
Fig. 4 is closed, the square wave control administrative unit 131 can be made of pwm chip U1, resistive element and capacity cell.
Wherein, in square wave control administrative unit 131, the connection relationship of each electrical component is no longer gone to live in the household of one's in-laws on getting married one by one herein
State, referring to figure 4. shown in circuit structure.It should be noted that the model of the pwm chip U1 can be
KA3525.It, can be based on OA pin and OB pin and two resistance being correspondingly connected with also, in pwm chip U1
The output end of two-way complementation is formed, to export the square-wave signal of exchange.
Optionally, the number amount and type for the electrical component that the power drive unit 133 includes are unrestricted, can basis
Practical application request is configured.In the present embodiment, in conjunction with Fig. 5, the power drive unit 133 can be by driving chip
U2, resistive element, capacity cell and diode element composition.
Wherein, in the power drive unit 133, this is no longer going to repeat them for the connection relationship of each electrical component, asks
Circuit structure referring to Figure 5.It should be noted that the model of the driving chip U2 can be IR2110.Also,
In driving chip U2, can input terminal by HI pin and LI pin as square-wave signal, to be controlled respectively with square wave
The output end connection (such as output end of the two-way complementation of OA pin and OB pin composition) of administrative unit 131, can also pass through HO
Pin and LO pin are as two output ends for driving the power output unit 150.
Optionally, the number amount and type for the electrical component that the power output unit 150 includes are unrestricted, can basis
Practical application request is configured.In the present embodiment, the power output unit 150 may include the first metal-oxide-semiconductor Q1, second
Metal-oxide-semiconductor Q2, the first capacitive load C1 and the second capacitive load C2.
In detail, output end (such as above-mentioned HO of the grid of the first metal-oxide-semiconductor Q1 and the square wave output unit 130
Pin) connection, drain electrode is connect with said supply unit 110, source electrode is connect with the first end of the inductance 200 to be measured.Described
The grid of two metal-oxide-semiconductor Q2 connect with the output end (such as above-mentioned LO pin) of the square wave output unit 130, drain with it is described to
Survey first end connection, the source electrode ground connection of inductance 200.The of one end of the first capacitive load C1 and the inductance 200 to be measured
The connection of two ends, other end ground connection.One end of the second capacitive load C2 connect with the drain electrode of the first metal-oxide-semiconductor Q1, is another
End is connect with the second end of the inductance 200 to be measured.
Wherein, the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 can be exported based on the square wave output unit 130
Signal alternately sequentially turns on.That is, when the first metal-oxide-semiconductor Q1 is connected, the second metal-oxide-semiconductor Q2 shutdown.First metal-oxide-semiconductor Q1 shutdown
When, the 2nd MOS conducting.
Also, the number amount and type for the electrical component that the first capacitive load C1 includes are unrestricted, can be according to reality
Border application demand is configured, for example, can be made of capacity cell, resistive element and inductance element one be in capacitive group
Part.Wherein, which can use electrolytic capacitor, to realize fast charging and discharging.
Similarly, the second capacitive load C2 can also form one by capacity cell, resistive element and inductance element and be in
The component of capacitive.Also, the capacity cell can also use electrolytic capacitor, to realize fast charging and discharging.
Further, for the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 progress current protection, in the present embodiment, institute
Stating power output unit 150 can also include first resistor R1 and second resistance R2.
In detail, the first resistor R1 can be connected in series in the first metal-oxide-semiconductor Q1 grid and the square wave it is defeated
Out between the output end (such as above-mentioned HO pin) of unit 130, that is to say, that the grid of the first metal-oxide-semiconductor Q1 and the side
The output end of wave output unit 130 passes through the first resistor R1 connection.The second resistance R2 can be connected in series in described
Between the grid of second metal-oxide-semiconductor Q2 and the output end (such as above-mentioned LO pin) of the square wave output unit 130, that is to say, that
The grid of the second metal-oxide-semiconductor Q2 is connect with the output end of the square wave output unit 130 by the second resistance R2.
Optionally, the number amount and type for the electrical component that the measuring unit 170 includes are unrestricted, can be according to reality
Applicable cases are configured.In the present embodiment, to be detected convenient for the electric current to inductance 200 to be measured, the measuring unit
170 may include 3rd resistor R3 and voltage detector OSC.
In detail, one end of the 3rd resistor R3 connect with the second end of the inductance 200 to be measured, the other end respectively with
The first capacitive load C1 is connected with the second capacitive load C2, so that the first capacitive load C1 and described second holds
Property load C 2 is connect by the 3rd resistor R3 with the inductance 200 to be measured.The voltage detector OSC and third electricity
It is in parallel to hinder R3, to acquire the voltage at the both ends the 3rd resistor R3, and the third electricity will be flowed through when the voltage mutates
Hinder saturation current of the electric current of R3 as the inductance 200 to be measured.
That is, the 3rd resistor R3 and the inductance to be measured 200 are connected in series, to flow through the inductance to be measured
200 electric current is equal to the electric current for flowing through the 3rd resistor R3.Therefore, by measuring the voltage at the both ends the 3rd resistor R3,
And the electric current for flowing through 3rd resistor R3 can be calculated based on the voltage, to complete to flowing through the inductance to be measured 200
The measurement of electric current.
Wherein, the type of the voltage detector OSC is unrestricted, can be configured according to practical application request, example
Such as, either only can be carried out the device of voltage measurement, it is also possible to the device with certain data processing function, detection
Voltage be converted to electric current.
In conclusion current measuring device 100 provided by the invention and current measurement system, pass through power supply unit 110, side
Wave output unit 130, power output unit 150 and measuring unit 170 are equipped with, and in power output unit 150
Capacitive load is set, to improve the electric current increase for flowing through the inductance to be measured 200 in charge and discharge process based on the capacitive load
Rate and then quickly and efficiently the saturation current of inductance is measured with shortening the time that the electric current issues mutation, have
There is high practical value.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of current measuring device is tested for the saturation current to inductance to be measured, which is characterized in that the electric current is surveyed
Measuring device includes:
Power supply unit；
The feeder ear of square wave output unit, the square wave output unit is connect with said supply unit；
Power output unit, the feeder ear of the power output unit is connect with said supply unit, input terminal and the square wave are defeated
Output end connection, output end and the inductance connection to be measured of unit out, with the square wave exported based on the square wave output unit
Signal exports square-wave voltage to the inductance to be measured, is gradually increased with flowing through the electric current of the inductance to be measured；
Measuring unit, the measuring unit and the inductance connection to be measured, to detect the electric current for flowing through the inductance to be measured when each
The value at quarter, and electric current is issued to when being mutated corresponding current value as the saturation current value of the inductance to be measured；
Wherein, the power output unit has capacitive load, to carry out charge/discharge operation based on the effect of the square-wave voltage,
And improved during charge and discharge and flow through the rate that the electric current of the inductance to be measured increases, mutation is issued to shorten the electric current
Time.
2. current measuring device according to claim 1, which is characterized in that the power output unit includes:
First metal-oxide-semiconductor, the grid of first metal-oxide-semiconductor connect with the output end of the square wave output unit, drain and the power supply
Unit connection, source electrode are connect with the first end of the inductance to be measured；
Second metal-oxide-semiconductor, the grid of second metal-oxide-semiconductor connect with the output end of the square wave output unit, drain with it is described to be measured
The first end connection of inductance, source electrode ground connection；
First capacitive load, one end of first capacitive load is connect with the second end of the inductance to be measured, the other end is grounded；
Second capacitive load, the drain electrode connection of one end of second capacitive load and first metal-oxide-semiconductor, the other end and it is described to
Survey the second end connection of inductance.
3. current measuring device according to claim 2, which is characterized in that the power output unit further include:
First resistor, the first resistor are connected in series in the grid of first metal-oxide-semiconductor and the output of the square wave output unit
Between end；
Second resistance, the second resistance are connected in series in the grid of second metal-oxide-semiconductor and the output of the square wave output unit
Between end.
4. current measuring device according to claim 2, which is characterized in that the measuring unit includes:
3rd resistor, one end of the 3rd resistor connect with the second end of the inductance to be measured, the other end is respectively with described first
Capacitive load is connected with second capacitive load, so that first capacitive load and second capacitive load are described in
3rd resistor and the inductance connection to be measured；
Voltage detector, the voltage detector is in parallel with the 3rd resistor, to acquire the voltage at the 3rd resistor both ends, and
The electric current of the 3rd resistor will be flowed through as the saturation current of the inductance to be measured when the voltage mutates.
5. current measuring device according to any one of claims 1-4, which is characterized in that said supply unit includes:
First DC output unit, first DC output unit are connect with the feeder ear of the square wave output unit, with to institute
It states square wave output unit and one direct current is provided；
Second DC output unit, second DC output unit are connect with the feeder ear of the power output unit, with to institute
It states square wave output unit and one direct current is provided.
6. current measuring device according to claim 5, which is characterized in that the output electricity of first DC output unit
Pressure is 12V, and the output voltage of second DC output unit is 100V.
7. current measuring device according to any one of claims 1-4, which is characterized in that the square wave output unit packet
It includes:
Square wave controls administrative unit, and the feeder ear of square wave control administrative unit is connect with said supply unit；
Power drive unit, the feeder ear of the power drive unit connect with said supply unit, input terminal and the square wave control
The output end connection of administrative unit processed, output end are connect with the input terminal of the power output unit, to be based on the square wave control
The square-wave signal of administrative unit output processed controls the power output unit and exports square-wave voltage to the inductance to be measured.
8. current measuring device according to claim 7, which is characterized in that the square wave control administrative unit is controlled by PWM
Coremaking piece, resistive element and capacity cell composition, the power drive unit is by driving chip, resistive element, capacity cell
And diode element composition.
9. current measuring device according to claim 8, which is characterized in that the model of the pwm chip
KA3525, the model IR2110 of driving chip.
10. a kind of current measurement system, which is characterized in that the saturation current including inductance to be measured and for measuring the inductance to be measured
Current measuring device, which includes:
Power supply unit；
The feeder ear of square wave output unit, the square wave output unit is connect with said supply unit；
Power output unit, the feeder ear of the power output unit is connect with said supply unit, input terminal and the square wave are defeated
Output end connection, output end and the inductance connection to be measured of unit out, with the square wave exported based on the square wave output unit
Signal exports square-wave voltage to the inductance to be measured, is gradually increased with flowing through the electric current of the inductance to be measured；
Measuring unit, the measuring unit and the inductance connection to be measured, to detect the electric current for flowing through the inductance to be measured when each
The value at quarter, and electric current is issued to when being mutated corresponding current value as the saturation current value of the inductance to be measured；
Wherein, the power output unit has capacitive load, to carry out charge/discharge operation based on the effect of the square-wave voltage,
And improved during charge and discharge and flow through the rate that the electric current of the inductance to be measured increases, mutation is issued to shorten the electric current
Time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811195271.1A CN109375118A (en) | 2018-10-15 | 2018-10-15 | Current measuring device and current measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811195271.1A CN109375118A (en) | 2018-10-15 | 2018-10-15 | Current measuring device and current measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109375118A true CN109375118A (en) | 2019-02-22 |
Family
ID=65398194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811195271.1A Pending CN109375118A (en) | 2018-10-15 | 2018-10-15 | Current measuring device and current measurement system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109375118A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917179A (en) * | 2019-03-20 | 2019-06-21 | 中国科学院上海微***与信息技术研究所 | Current detecting system and electric current detecting method based on power device parasitic inductance |
| CN110850179A (en) * | 2019-12-04 | 2020-02-28 | 福建龙净环保股份有限公司 | Inductance saturation parameter measuring circuit and device |
| CN113049868A (en) * | 2021-03-10 | 2021-06-29 | 优利德科技(中国)股份有限公司 | Alternating current and direct current measuring device and measuring method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105843980A (en) * | 2015-02-02 | 2016-08-10 | 株式会社村田制作所 | Power inductor evaluation apparatus and power inductor evaluation program |
| CN205594058U (en) * | 2016-03-24 | 2016-09-21 | 山东科技大学 | Novel power inductance saturation current test circuit |
-
2018
- 2018-10-15 CN CN201811195271.1A patent/CN109375118A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105843980A (en) * | 2015-02-02 | 2016-08-10 | 株式会社村田制作所 | Power inductor evaluation apparatus and power inductor evaluation program |
| CN205594058U (en) * | 2016-03-24 | 2016-09-21 | 山东科技大学 | Novel power inductance saturation current test circuit |
Non-Patent Citations (1)
| Title |
|---|
| 周文婷: "功率电感磁饱和电流的测试与分析", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917179A (en) * | 2019-03-20 | 2019-06-21 | 中国科学院上海微***与信息技术研究所 | Current detecting system and electric current detecting method based on power device parasitic inductance |
| CN110850179A (en) * | 2019-12-04 | 2020-02-28 | 福建龙净环保股份有限公司 | Inductance saturation parameter measuring circuit and device |
| CN110850179B (en) * | 2019-12-04 | 2021-11-19 | 福建龙净环保股份有限公司 | Inductance saturation parameter measuring circuit and device |
| CN113049868A (en) * | 2021-03-10 | 2021-06-29 | 优利德科技(中国)股份有限公司 | Alternating current and direct current measuring device and measuring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109375118A (en) | Current measuring device and current measurement system | |
| CN105182117B (en) | A kind of direct current comprehensive test platform | |
| CN203705621U (en) | Metering circuit of residual capacity of battery pack | |
| CN109374996A (en) | A kind of the dipulse test circuit and method of three level DCDC (PCC) power of striding capacitance | |
| CN101470174B (en) | Accumulator monitoring equipment and method thereof | |
| CN105510833B (en) | Accumulator method for detecting health status, apparatus and system | |
| JP6902545B2 (en) | Check connectivity between cell and control wiring electronics using a single switch | |
| KR101358763B1 (en) | Apparatus for implementing of voltage equalization of unit rack used for power storage during connection therebetween and System including the same | |
| CN105445639A (en) | IGBT output characteristic test device | |
| CN105738833B (en) | A kind of method and diagnostic equipment for diagnosing automobile batteries health status | |
| CN105068016A (en) | Battery power display control method and battery power display control circuit | |
| CN105425159A (en) | Device and method for detecting remaining power of battery | |
| CN203858310U (en) | Large-power energy-storage current transformer testing system | |
| CN106208177B (en) | A kind of battery electron management method and system | |
| CN201514470U (en) | Switch power supply testing instrument | |
| CN203164242U (en) | Current waveform generation device | |
| CN103675389B (en) | A kind of alternating-current and direct-current dual-purpose voltage transformer | |
| CN105158573B (en) | A kind of battery pack internal resistance detection circuit and battery pack internal resistance detection method and device | |
| CN103797697B (en) | For there is the circuit of the small electric apparatus of accumulator and for the method measuring charging current | |
| CN204287447U (en) | A kind of alternating current-direct current input detecting circuit | |
| US11644513B1 (en) | Real-time AC-impedance inspection using limited-energy on-board AC excitation for battery management system | |
| CN101888177A (en) | Power supply and semiconductor test device using the same | |
| CN203037815U (en) | Photovoltaic assembly heat cycle testing circuit monitoring device | |
| CN203658435U (en) | AC/DC voltage transformer | |
| CN102882391A (en) | Voltage simulator of power battery pack of electric automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190222 |
|
| RJ01 | Rejection of invention patent application after publication |