CN110068779A - A kind of proportional integral circuit and method identifying convex wave - Google Patents
A kind of proportional integral circuit and method identifying convex wave Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a kind of proportional integral circuits for identifying convex wave, input parameter -- the electric current of the circuit, from main circuit, the main circuit is made of a full-bridge circuit and single-end circuit, wherein, which is made of a subtraction circuit and a quadratic integral circuit.The utility model has the advantages that the present invention is by directly calculating the saturation current of magnetic material using main circuit and single-chip microcontroller, to calculate the Bs and Br of magnetic material, furthermore, the circuit is in addition to that can be used to test core material, it may be also used in the measurement for the interlock circuit parameter for having current break in arbitrary circuit above, therefore, application field is extremely extensive.
Description
Technical field
The present invention relates to electronic fields, it particularly relates to a kind of proportional integral circuit and method for identifying convex wave.
Background technique
With the rapid development of electronic technology, the use of magnetic material is also increasingly extensive, still, can not find always on the market
A kind of tester of the saturation flux density Bs that can directly measure core material and remanent magnetism Br, this is mainly due to magnetic cores full
And when, the magnetizing current sharp increase (current waveform stands out) above corresponding coil, although this characteristic is on oscillograph
But it can clearly be observed that being but difficult to screen or read this characteristic with single-chip microcontroller or DSP device.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Summary of the invention
For the problems in the relevant technologies, the present invention proposes a kind of proportional integral circuit and method for identifying convex wave, can
Directly to calculate the saturation current of magnetic material using interlock circuit and single-chip microcontroller, thus calculate magnetic material Bs and
Br, and this excellent measurement method is generalized in other circuit measurings there are current break and also obtains very high-precision
Measurement result, to overcome above-mentioned technical problem present in existing the relevant technologies.
The technical scheme of the present invention is realized as follows:
According to an aspect of the invention, there is provided a kind of proportional integral circuit for identifying convex wave, the input ginseng of the circuit
Number -- electric current, from main circuit, the main circuit allows the two-way magnetized full-bridge circuit of magnetic core by one and one allows magnetic core list
It is formed to magnetized single-end circuit.
The proportional integral circuit is made of a subtraction circuit and a quadratic integral circuit.
Further, the subtraction circuit includes power supply, resistance R1, resistance R3, resistance R9, resistance R10, resistance R11, electricity
Hinder R12, capacitor C5, capacitor C6, capacitor C7, capacitor C8, variable resistance VR3, operational amplifier U5A and operational amplifier U4A, institute
The one end for stating resistance R1 is connect with one end of primary current IS, the other end of the resistance R1 respectively with the operational amplifier
The second pin of U5A, the resistance R9 one end connected with one end of the capacitor C5, the first of the operational amplifier U5A
Pin respectively with the other end of the resistance R9, the other end of the capacitor C5, one end of the resistance R10 and the capacitor C6
One end connection, the third pin of the operational amplifier U5A connect with one end of the resistance R3, the operational amplifier
The 8th pin of U5A is connect with the positive VCC of the power supply, the other end of the resistance R10 respectively with the resistance R11 one
End, one end of the capacitor C8, the operational amplifier U4A second pin connected with one end of the capacitor C7, the fortune
Calculate amplifier U4A the first pin respectively with the other end of the capacitor C8, one end of the resistance R12, the variable resistance
One end of VR3 connects, and the other end of the variable resistance VR3 and convertible tip are connect with the other end of the resistance R11, institute
State the third pin of the operational amplifier U4A other end and the electricity with the other end of the capacitor C7, the capacitor C6 respectively
It hinders the other end connection of R3 and is grounded, the positive VCC connection of the 8th pin and power supply of the operational amplifier U4A, the electricity
The other end of resistance R12 is connect with the first current output terminal ISP.
Further, the quadratic integral circuit include power supply, resistance R2, resistance R5, resistance R6, resistance R7, resistance R8,
Capacitor C1, capacitor C2, capacitor C3, capacitor C4, variable resistance VR2, operational amplifier U5B and operational amplifier U4B, the resistance
One end of R2 is connect with one end of the primary current IS, the other end of the resistance R2 respectively with the operational amplifier U5B
The 6th pin, the resistance R5 one end connected with one end of the capacitor C1, the 7th pin of the operational amplifier U5B
Respectively with the one of the other end of the resistance R5, the other end of the capacitor C1, one end of the resistance R6 and the capacitor C2
End connection, the 5th pin ground connection of the operational amplifier U5B, the 8th pin and the power supply of the operational amplifier U5B
Positive VCC connection, the other end of resistance R6 one end, described with one end of the resistance R7, the capacitor C4 respectively
The 6th pin of operational amplifier U4B is connected with one end of the capacitor C3, the 7th pin difference of the operational amplifier U4B
Connect with one end of the other end of the capacitor C4, one end of the resistance R8 and the variable resistance VR2, and it is described can power transformation
The other end and convertible tip for hindering VR2 are connect with one end of the resistance R7, the 5th pin difference of the operational amplifier U4B
It connect and is grounded with the other end of the other end of the capacitor C3 and the capacitor C2, the 8th of the operational amplifier U4B draws
The positive VCC connection of foot and power supply, the other end of the resistance R8 are connect with the second current output terminal ISB.
Further, connected between the subtraction circuit and the quadratic integral circuit by resistance R4 and variable resistance VR1
It connects, one end of the resistance R4 is connect with the third pin of one end of the resistance R3 and the operational amplifier U5A respectively, institute
The other end for stating resistance R4 is connect with one end of the variable resistance VR1, and the other end and convertible tip of the variable resistance VR1 is equal
Respectively with the other end of the capacitor C4, the 7th pin of the operational amplifier U4B, the resistance R8 one end and it is described can
Power transformation hinders one end connection of VR2.
Further, the operational amplifier U5B and U4B is used to carry out collected current signal integral twice to transport
It calculates, the operational amplifier U5A and U4A is used to small multiplied by one to the output signal of collected current signal and the U4B
After 1 coefficient progress subtraction, integral operation twice is carried out to its difference.
According to another aspect of the present invention, a kind of measurement method for identifying convex wave proportional integral circuit is provided, including
Following steps:
Several circle conductive coils of winding on magnetic material to be measured, and accessed in test main circuit；
By relay corresponding in single chip machine controlling circuit, so that magnetic core coil successively accesses full-bridge circuit and single-ended electricity
Lu Zhong；
It adjusts the output voltage of full-bridge or single-end circuit and the Ton time of inversion step by step respectively by single-chip microcontroller, and records
Ton and U when electric current stands out；
The maximum saturation magnetic flux density Bs and residual magnetic flux density Br of magnetic core are found out according to presetting method；
According to the correspondence numerical value that different time sections in above-mentioned presetting method are found out calculate the magnetic core initial permeability and
Effective permeability.
Further, the magnetic material to be measured can be the magnetic materials such as magnet ring, and the conductive coil twines
Around circle number be 5 circle.
Further, the presetting method are as follows: according to the induced electromotive force formula of magnetic core:
It is obtained by (1):
Obviously, the maximum variable quantity of magnetic flux density in each period can be found out by (2) formula, it is assumed that in full-bridge circuit
Δ B corresponds to Δ B1, and Δ B corresponds to Δ B2 in half-bridge circuit, and assumes the saturation flux density and residual magnetic flux density of the magnetic core
Respectively Bs and Br, then, just have:
Δ B1=Bs+Br (3)
Δ B2=Bs-Br (4)
So as to acquire the maximum saturation magnetic flux density Bs and residual magnetic flux density Br of magnetic core.
Wherein, above in formula: U is input voltage, that is, is added in magnetic core coil both ends by half-bridge or full-bridge circuit
DC voltage；N is the circle number of magnetic core coil, and ΔΦ is the flux change amount for passing through coil in the Δ t time, the section of S magnetic core
Product, Δ B is the variable quantity of magnetic flux density in the Ton time, and Ton is the turn-on time of switching tube in one or half period, and Δ H is
The reaction heat generated in the Ton time, H is magnetic field strength.
Further, the corresponding numerical value is respectively the corresponding Δ B that different time sections are found out, Δ H and H value.
The invention has the benefit that
The present invention is by directly calculating the saturation current of magnetic material using main circuit and single-chip microcontroller, to calculate magnetic
The Bs and Br of property material, in addition, the circuit, in addition to that can be used to test core material, may be also used in arbitrary circuit has electricity
Above, therefore, application field is extremely extensive for the measurement of the interlock circuit parameter of stream mutation.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of circuit diagram of proportional integral circuit for identifying convex wave according to an embodiment of the present invention.
Fig. 2 is a kind of flow chart of measurement method for identifying convex wave proportional integral circuit according to an embodiment of the present invention.
Specific embodiment
To further illustrate that each embodiment, the present invention are provided with attached drawing, these attached drawings are that the invention discloses one of content
Point, mainly to illustrate embodiment, and the associated description of specification can be cooperated to explain the operation principles of embodiment, cooperation ginseng
Examine these contents, those of ordinary skill in the art will be understood that other possible embodiments and advantages of the present invention, in figure
Component be not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
According to an embodiment of the invention, a kind of proportional integral circuit for identifying convex wave is provided, as shown in Figure 1, the circuit
Input parameter -- electric current, from main circuit, the main circuit allows the two-way magnetized full-bridge circuit of magnetic core and one by one
The single-end circuit of magnetic core unidirectional magnetiztion is allowed to form.
The proportional integral circuit is made of a subtraction circuit and a quadratic integral circuit.
In one embodiment, the subtraction circuit includes power supply, resistance R1, resistance R3, resistance R9, resistance R10, resistance
R11, resistance R12, capacitor C5, capacitor C6, capacitor C7, capacitor C8, variable resistance VR3, operational amplifier U5A and operational amplifier
One end of U4A, the resistance R1 are connect with one end of primary current IS, and the other end of the resistance R1 is put with the operation respectively
The second pin of big device U5A, one end of the resistance R9 are connected with one end of the capacitor C5, the operational amplifier U5A's
First pin respectively with the other end of the resistance R9, the other end of the capacitor C5, one end of the resistance R10 and the electricity
Hold one end connection of C6, the third pin of the operational amplifier U5A is connect with one end of the resistance R3, the operation amplifier
The 8th pin of device U5A is connect with the positive VCC of the power supply, and the other end of the resistance R10 is respectively with the resistance R11's
One end, one end of the capacitor C8, the operational amplifier U4A second pin connected with one end of the capacitor C7, it is described
The first pin of operational amplifier U4A respectively with the other end of the capacitor C8, the resistance R12 one end, it is described can power transformation
One end connection of VR3 is hindered, and the other end of the variable resistance VR3 and convertible tip are connect with the other end of the resistance R11,
The third pin of the operational amplifier U4A respectively with the other end of the capacitor C7, the other end of the capacitor C6 and described
The other end of resistance R3 is connected and is grounded, and the positive VCC connection of the 8th pin and power supply of the operational amplifier U4A is described
The other end of resistance R12 is connect with the first current output terminal ISP.
In one embodiment, the quadratic integral circuit include power supply, resistance R2, resistance R5, resistance R6, resistance R7,
Resistance R8, capacitor C1, capacitor C2, capacitor C3, capacitor C4, variable resistance VR2, operational amplifier U5B and operational amplifier U4B,
One end of the resistance R2 is connect with one end of the primary current IS, and the other end of the resistance R2 is put with the operation respectively
The 6th pin of big device U5B, one end of the resistance R5 are connected with one end of the capacitor C1, the operational amplifier U5B's
7th pin respectively with the other end of the resistance R5, the other end of the capacitor C1, one end of the resistance R6 and the electricity
Hold C2 one end connection, the operational amplifier U5B the 5th pin ground connection, the 8th pin of the operational amplifier U5B with
The positive VCC connection of the power supply, the other end of the resistance R6 respectively with one end of the resistance R7, the capacitor C4 one
End, the operational amplifier U4B the 6th pin connected with one end of the capacitor C3, the 7th of the operational amplifier U4B the
Pin is connect with one end of the other end of the capacitor C4, one end of the resistance R8 and the variable resistance VR2 respectively, and institute
The other end and convertible tip for stating variable resistance VR2 are connect with one end of the resistance R7, and the 5th of the operational amplifier U4B the
Pin connect and is grounded with the other end of the other end of the capacitor C3 and the capacitor C2 respectively, the operational amplifier U4B
The 8th pin and power supply positive VCC connection, the other end of the resistance R8 connect with the second current output terminal ISB.
In one embodiment, pass through resistance R4 and variable resistance between the subtraction circuit and the quadratic integral circuit
VR1 connection, one end of the resistance R4 connect with the third pin of one end of the resistance R3 and the operational amplifier U5A respectively
It connects, the other end of the resistance R4 is connect with one end of the variable resistance VR1, the other end of the variable resistance VR1 and can
Become end respectively with the other end of the capacitor C4, the 7th pin of the operational amplifier U4B, the resistance R8 one end and
One end of the variable resistance VR2 connects.
In one embodiment, the operational amplifier U5B and U4B is used to accumulate collected current signal twice
Partite transport is calculated, and the operational amplifier U5A and U4A is used to the output signal of collected current signal and the U4B multiplied by one
After a coefficient less than 1 carries out subtraction, integral operation twice is carried out to its difference, by comparing the first current output terminal ISP
Size with the second current output terminal ISB is it is known that whether primary current IS stands out or whether size of current is mutated.
Wherein, the core of the invention patent is, current signal is converted to voltage signal, when magnetic core is not saturated
(when the critical point of current break has not been reached yet in the variation range of namely electric current), the electric current flowed through around the coil of magnetic core
Waveform is triangle, in this case, it is known that new triangle, area composed by the half of triangle side length are
The a quarter of original triangle shape area.This proportionality coefficient is maintained, when magnetic core is not saturated, the area of two triangles is closed
What system always set up.But when magnetic core once being saturated, current waveform stands out, and the area relationship of two triangles is no longer set up, by
This can identify whether magnetic core enters saturation state, and read the size of current for being in this critical point type, voltage swing
And Ton.
According to another aspect of the present invention, a kind of measurement method for identifying convex wave proportional integral circuit, such as Fig. 2 are provided
It is shown, comprising the following steps:
Step S101, several circle conductive coils of winding on magnetic material to be measured, and accessed in test main circuit；
Step S102, by relay corresponding in single chip machine controlling circuit, so that magnetic core coil successively accesses full-bridge electricity
In road and single-end circuit；
Step S103, when distinguishing the Ton of the output voltage and inversion that adjust full-bridge or single-end circuit step by step by single-chip microcontroller
Between, and Ton and U when record current stands out；
Step S104 finds out the maximum saturation magnetic flux density Bs and residual magnetic flux density Br of magnetic core according to presetting method；
Step S105 calculates the initial of the magnetic core according to the correspondence numerical value that different time sections in above-mentioned presetting method are found out
Magnetic conductivity and Effective permeability.
Wherein, the magnetic material to be measured can be the magnetic material such as magnet ring, and conductive coil winding
Enclosing number is 5 circles.
The presetting method are as follows: according to the induced electromotive force formula of magnetic core:
It is obtained by (1):
Obviously, the maximum variable quantity of magnetic flux density in each period can be found out by (2) formula, it is assumed that in full-bridge circuit
Δ B corresponds to Δ B1, and Δ B corresponds to Δ B2 in half-bridge circuit, and assumes the saturation flux density and residual magnetic flux density of the magnetic core
Respectively Bs and Br, then, just have:
Δ B1=Bs+Br (3)
Δ B2=Bs-Br (4)
So as to acquire the maximum saturation magnetic flux density Bs and residual magnetic flux density Br of magnetic core；
Wherein, above in formula: U is input voltage, that is, is added in the straight of magnetic core coil both ends by half-bridge or full-bridge
Galvanic electricity pressure；N is the circle number of magnetic core coil, and ΔΦ is the flux change amount for passing through coil in the Δ t time, the sectional area of S magnetic core, Δ
B is the variable quantity of magnetic flux density in the Ton time, and Ton is the turn-on time of switching tube in one or half period, when Δ H is Ton
The reaction heat of interior generation, H are magnetic field strengths.
Specifically, the corresponding numerical value is respectively the corresponding Δ B that different time sections are found out, Δ H and H value.Wherein, described
Magnetic conductivity is obtained by formula μ=B/H, wherein H=magnetic field strength, B=magnetic induction intensity, and conventional sign μ indicates that μ is medium
Magnetic conductivity or absolute permeability,
Initial permeability μ i: refer to magnetic conductivity of the fundamental magnetization curve as H → 0, Effective permeability μ r: with inductance L
It is formed in closed magnetic circuit (leakage field can be ignored), the Effective permeability of magnetic core are as follows:Wherein, L is winding
Self-inductance (mH), W --- umber of turn, Lm is the length of magnetic path, and Ae is core cross section product.
In conclusion by means of above-mentioned technical proposal of the invention, by directly being calculated using main circuit and single-chip microcontroller
The saturation current of magnetic material, so that the Bs and Br of magnetic material are calculated, in addition, the circuit is in addition to that can be used to test magnetic core
Material, may be also used in have in arbitrary circuit physical quantity be mutated interlock circuit parameter measurement above, therefore, application field
Extremely extensively.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of proportional integral circuit for identifying convex wave, which is characterized in that input parameter -- the electric current of the circuit, from main electricity
Road, the main circuit allow the two-way magnetized full-bridge circuit of magnetic core and a single-end circuit group for allowing magnetic core unidirectional magnetiztion by one
At, wherein the proportional integral circuit is made of a subtraction circuit and a quadratic integral circuit.
2. a kind of proportional integral circuit for identifying convex wave according to claim 1, which is characterized in that the subtraction circuit includes
Power supply, resistance R1, resistance R3, resistance R9, resistance R10, resistance R11, resistance R12, capacitor C5, capacitor C6, capacitor C7, capacitor
One end and the one of primary current IS of C8, variable resistance VR3, operational amplifier U5A and operational amplifier U4A, the resistance R1
End connection, the other end of the resistance R1 respectively with the second pin of the operational amplifier U5A, the resistance R9 one end and
One end of the capacitor C5 connects, the first pin of the operational amplifier U5A respectively with the other end of the resistance R9, described
The other end of capacitor C5, the resistance R10 one end connected with one end of the capacitor C6, the of the operational amplifier U5A
Three pins are connect with one end of the resistance R3, and the 8th pin of the operational amplifier U5A and the positive VCC of the power supply connect
Connect, the other end of the resistance R10 respectively with one end of the resistance R11, one end of the capacitor C8, the operational amplifier
The second pin of U4A is connected with one end of the capacitor C7, the first pin of the operational amplifier U4A respectively with the capacitor
One end connection of the other end of C8, one end of the resistance R12, the variable resistance VR3, and the variable resistance VR3's is another
One end and convertible tip are connect with the other end of the resistance R11, the third pin of the operational amplifier U4A respectively with it is described
The other end of capacitor C7, the capacitor C6 the other end connect and be grounded with the other end of the resistance R3, the operation amplifier
The positive VCC connection of the 8th pin and power supply of device U4A, the other end of the resistance R12 and the first current output terminal ISP connect
It connects.
3. a kind of proportional integral circuit for identifying convex wave according to claim 2, which is characterized in that the quadratic integral electricity
Road include power supply, resistance R2, resistance R5, resistance R6, resistance R7, resistance R8, capacitor C1, capacitor C2, capacitor C3, capacitor C4, can
Power transformation hinders VR2, operational amplifier U5B and operational amplifier U4B, one end of one end of the resistance R2 and the primary current IS
Connection, the other end of the resistance R2 respectively with the 6th pin of the operational amplifier U5B, one end of the resistance R5 and institute
State capacitor C1 one end connection, the 7th pin of the operational amplifier U5B respectively with the other end of the resistance R5, the electricity
One end of the other end, the resistance R6 that hold C1 is connected with one end of the capacitor C2, and the 5th of the operational amplifier U5B draws
Foot ground connection, the 8th pin of the operational amplifier U5B are connect with the positive VCC of the power supply, the other end of the resistance R6
Respectively with one end of the resistance R7, one end of the capacitor C4, the operational amplifier U4B the 6th pin and the capacitor
One end of C3 connects, the 7th pin of the operational amplifier U4B respectively with the other end of the capacitor C4, the resistance R8
One end is connected with one end of the variable resistance VR2, and the other end of the variable resistance VR2 and convertible tip with the resistance
One end of R7 connects, the 5th pin of the operational amplifier U4B respectively with the other end of the capacitor C3 and the capacitor C2
The other end connection and be grounded, the positive VCC connection of the 8th pin and power supply of the operational amplifier U4B, the resistance R8
The other end connect with the second current output terminal ISB.
4. a kind of proportional integral circuit for identifying convex wave according to claim 3, which is characterized in that the subtraction circuit and
Connected with variable resistance VR1 between the quadratic integral circuit by resistance R4, one end of the resistance R4 respectively with the electricity
One end of resistance R3 is connected with the third pin of the operational amplifier U5A, the other end and the variable resistance of the resistance R4
One end of VR1 connects, the other end and convertible tip of the variable resistance VR1 respectively with the other end of the capacitor C4, described
The 7th pin of operational amplifier U4B, one end of the resistance R8 are connected with one end of the variable resistance VR2.
5. a kind of proportional integral circuit for identifying convex wave according to claim 4, which is characterized in that the operational amplifier
U5B and U4B is used to carry out collected current signal integral operation twice, and the operational amplifier U5A and U4A is used to adopting
After the output signal of the current signal and the U4B that collect carries out subtraction multiplied by a coefficient less than 1, its difference is carried out
Integral operation twice.
6. a kind of measurement method for identifying convex wave proportional integral circuit, for a kind of ratio for identifying convex wave described in claim 5
The measurement of example integrating circuit, which comprises the following steps:
Several circle conductive coils of winding on magnetic material to be measured, and accessed in test main circuit；
By relay corresponding in single chip machine controlling circuit, so that magnetic core coil successively accesses full-bridge circuit and single-end circuit
In；
Adjust the output voltage of full-bridge or single-end circuit and the Ton time of inversion, and record current step by step respectively by single-chip microcontroller
Ton and U when standing out；
The maximum saturation magnetic flux density Bs and residual magnetic flux density Br of magnetic core are found out according to presetting method；
According to the correspondence numerical value that different time sections in above-mentioned presetting method are found out calculate the magnetic core initial permeability and effectively
Magnetic conductivity.
7. a kind of measurement method for identifying convex wave proportional integral circuit according to claim 5, which is characterized in that it is described to
The magnetic material of survey can be magnet ring, nanocrystalline to wait magnetic materials, and the circle number of conductive coil winding is 5 circles.
8. a kind of measurement method for identifying convex wave proportional integral circuit according to claim 5, which is characterized in that described pre-
Equipment, method are as follows: according to the induced electromotive force formula of magnetic core:
It is obtained by (1):
Obviously, the maximum variable quantity of magnetic flux density in each period can be found out by (2) formula, it is assumed that the Δ B in full-bridge circuit
Δ B1 is corresponded to, Δ B corresponds to Δ B2 in half-bridge circuit, and assumes the saturation flux density and residual magnetic flux density difference of the magnetic core
For Bs and Br, then, just have:
Δ B1=Bs+Br (3)
Δ B2=Bs-Br (4)
So as to acquire the maximum saturation magnetic flux density Bs and residual magnetic flux density Br of magnetic core；
Wherein, above in formula: U is input voltage, that is, the direct current at magnetic core coil both ends is added in by half-bridge or full-bridge
Pressure；N is the circle number of magnetic core coil, and ΔΦ is the flux change amount for passing through coil in the Δ t time, the sectional area of S magnetic core, and Δ B is
The variable quantity of magnetic flux density in the Ton time, Ton are the turn-on times of switching tube in one or half period, and Δ H is the Ton time
The reaction heat of interior generation, H are magnetic field strengths.
9. a kind of measurement method for identifying convex wave proportional integral circuit according to claim 5, which is characterized in that described right
Answering numerical value is respectively the corresponding Δ B that different time sections are found out, Δ H and H value.
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| CN201910505013.7A CN110068779A (en) | 2019-06-12 | 2019-06-12 | A kind of proportional integral circuit and method identifying convex wave |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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