CN105845405A - Discrete magnetic element coupling circuit and control method based on the circuit - Google Patents

Abstract

The invention relates to a discrete magnetic element coupling circuit and a control method based on the circuit. The circuit comprises a first magnetic element and a second magnetic element which are mutually independent. Additional windings are winded on the first magnetic element and the second magnetic element. The additional windings form a loop by a connection impedor, and therefore, the coupling relationship between the first magnetic element and the second magnetic element is established. The method comprises that the coupling relationship between the first magnetic element and the second magnetic element is adjusted by adjusting the impedance value of the connection impedor or/and by adjusting the inductance value of the additional winding of the first magnetic element and the mutual inductance value of the first magnetic element, and adjusting the inductance value of the additional winding of the second magnetic element and the mutual inductance value of the second magnetic element. According to the discrete magnetic element coupling circuit and the control method based on the circuit, coupling control is carried out on two or more independent magnetic elements, and moreover, the circuit and the method are simple in structure, low in control difficulty and high in flexibility.

Description

A kind of separate magnetic element coupling circuit and control method thereof

Technical field

The present invention relates to a kind of separate magnetic element coupling circuit and control method thereof.

Background technology

Tradition is in the application of Switching Power Supply, and magnetic coupling technology may be used in different magnetic elements, in order to improve the loss characteristic of Switching Power Supply, electromagnetic compatibility characteristic and power density.Current magnetic coupling technology is all employing multiple secondary winding in same magnetic core, is controlled the coupling realizing between winding by magnetic circuit.For the coupling of two separate magnetic components or multiple separate magnetic components currently without corresponding method.

The method of existing two element near-field couplings of control has the most several:

1, traditional mutual inductance

As it is shown in figure 1, when the electric current in a coil changes, another coil closed on produces induced electromotive force, is called mutual inductance phenomenon.Mutual inductance phenomenon is a kind of common electromagnetic induction phenomenon, does not occur only between two coils being wound on same iron core, and can also betide between the circuit that any two is close to each other.By changing mutual alignment and the distance of two inductance, the size of the coefficient of coup can be controlled the most to a certain extent.

2, a kind of air-gap-free variable coupling inductor

As in figure 2 it is shown, utilize the formation basic theory of mutual inductance, by multiple coil windings on the iron core that magnetic circuit communicates, carry out the size of mutual inductance between control coil by the number of turn controlling each coil.From formula, change coil turn and can change the total magnetic flux size that coil chain is crossed, and then change the mutual inductance between coil.As in figure 2 it is shown, the number of turn of control coil 31, coil 32 and coil 33 can change mutual inductance size.

$M_{12}=\frac{{\mathrm{\ψ}}_{12}}{i_1}$

3, integrated magnetic

Integrated magnetic is by the two or more discrete devices in converter, such as inductance, transformer etc., it is wound on a secondary magnetic core, concentrate in together from structure, the volume of magnetic device, weight can be reduced, sometimes can also reduce current ripples, reduction magnetic part loss, improve power supply dynamic property, significant to the performance and power density improving power supply.One integrated application of typical magnetic is as shown in Figure 3:

Using EI type core structure, by coil winding on three magnetic posts, if be applied to integrated transformer and inductor, the magnetic flux that inductor winding produces can be through the magnetic circuit of transformer；If be applied to integrated common mode inductance and differential mode inductance, the magnetic flux that differential mode inductance winding produces can be through common mode inductance part.All make magnetic core be fully used in the case of two kinds, the most indirectly define coupling between transformer with inductor, common mode inductance and differential mode inductance.

The above is all the coupling control being realized two magnetic elements in same magnetic core by control air gap or magnetic circuit, and the method depends on the design of magnetic circuit, controls difficulty high, and manufacturing cost is high.And all without to two separate magnetic components couplings or the control mode of multiple separate magnetic components.

Summary of the invention

It is an object of the invention to provide a kind of separate magnetic element coupling circuit and control method thereof, to overcome defect present in prior art.

For achieving the above object, the technical scheme is that a kind of separate magnetic element coupling circuit, including the first separate magnetic element and the second magnetic element；Rotating around being shaped with additional winding on described first magnetic element and on described second magnetic element, described additional winding forms loop by a connection impedance, thus sets up the coupled relation of described first magnetic element and described second magnetic element.

Further, it is provided that the control method of a kind of separate magnetic element coupling circuit, by regulating the resistance value of described connection impedance, thus the coupled relation of described first magnetic element and described second magnetic element is adjusted.

In an embodiment of the present invention, described connection impedance is combination or the combination of inductance, electric capacity and resistance of the combination of the combination of inductance and electric capacity, inductance and resistance, electric capacity and resistance.

In an embodiment of the present invention, by coupling between magnetic element two-by-two and control in multiple separate magnetic elements, it is achieved the coupling of multiple magnetic elements and control.

Further, the control method of a kind of separate magnetic element coupling circuit is provided, by inductance value and the mutual induction amount of described first magnetic element of the described first additional winding of magnetic element of regulation, regulate the inductance value of the described second additional winding of magnetic element and the mutual induction amount of described two magnetic elements, thus adjust described first magnetic element and the coupled relation of the second magnetic element.

In an embodiment of the present invention, described connection impedance is combination or the combination of inductance, electric capacity and resistance of the combination of the combination of inductance and electric capacity, inductance and resistance, electric capacity and resistance.

In an embodiment of the present invention, by coupling between magnetic element two-by-two and control in multiple separate magnetic elements, it is achieved the coupling of multiple magnetic elements and control.

Further, the control method of a kind of separate magnetic element coupling circuit is provided, by regulating the resistance value of described connection impedance, regulating the described inductance value of the first additional winding of magnetic element and the mutual induction amount of described first magnetic element and regulate the inductance value of the described second additional winding of magnetic element and the mutual induction amount of described two magnetic elements, thus adjust described first magnetic element and the coupled relation of the second magnetic element.

In an embodiment of the present invention, described connection impedance is combination or the combination of inductance, electric capacity and resistance of the combination of the combination of inductance and electric capacity, inductance and resistance, electric capacity and resistance.

In an embodiment of the present invention, by coupling between magnetic element two-by-two and control in multiple separate magnetic elements, it is achieved the coupling of multiple magnetic elements and control.

Compared to prior art, the method have the advantages that

1. can realize coupling and the control of two separate magnetic element.

2. can easily be accommodated, it is possible to achieve the accurate control to discrete component coupling.

3. coupling and the control of discrete magnetic part be can realize a long way off, product design and the convenience of realization and possibility added.

4. need not additionally increase magnetic core or design extra magnetic circuit, greatly reduce the design difficulty of magnetic element, significant positive role is played in the design to product.

5. magnetic element of different nature can be coupled, greatly widen the mentality of designing of electronic product.

Accompanying drawing explanation

Fig. 1 is that tradition mutual inductance forms schematic diagram.

Fig. 2 is air-gap-free variable coupling inductor schematic diagram.

Fig. 3 is magnetic integrated mechanism.

Fig. 4 is two inductive figure in one embodiment of the invention.

Fig. 5 is that in one embodiment of the invention, additional winding controls two inductance.

Fig. 6 is additional winding construction figure in one embodiment of the invention

Fig. 7 is the Transformation Graphs that in one embodiment of the invention, additional winding one end is connected with former inductance.

Fig. 8 is additional winding decoupling schematic diagram in one embodiment of the invention.

Fig. 9 is to work as Z in one embodiment of the invention₁₂=L₀Time M₁₂With L₀Change curve.

Figure 10 is to work as Z in one embodiment of the invention₁₂L during=R_eq, R_eqWith R change curve.

Figure 11 is to work as Z in one embodiment of the invention₁₂L during=R_eq, R_eqWith f change curve.

Figure 12 is to work as Z in one embodiment of the invention₁₂M during=C₁₂With C change curve.

Figure 13 is to work as Z in one embodiment of the invention₁₂M during=C₁₂With f change curve.

Figure 14 is the schematic diagram using the first coupled modes in one embodiment of the invention between two inductance.

Figure 15 is the schematic diagram using the second coupled modes in one embodiment of the invention between two inductance.

Figure 16 is the schematic diagram using the 3rd coupled modes in one embodiment of the invention between two inductance.

Figure 17 is the schematic diagram using the 4th coupled modes in one embodiment of the invention between two inductance.

Figure 18 is the schematic diagram that in one embodiment of the invention, inductance and common mode inductance use the first coupled modes.

Figure 19 is the schematic diagram that in one embodiment of the invention, inductance and common mode inductance use the second coupled modes.

Figure 20 is the schematic diagram that in one embodiment of the invention, inductance and common mode inductance use the 3rd coupled modes.

Figure 21 is the schematic diagram that in one embodiment of the invention, inductance and common mode inductance use the 4th coupled modes.

Figure 22 is the schematic diagram that in one embodiment of the invention, two common mode inductances use the first coupled modes.

Figure 23 is the schematic diagram that in one embodiment of the invention, two common mode inductances use the second coupled modes.

Figure 24 is the schematic diagram that in one embodiment of the invention, two common mode inductances use the 3rd coupled modes.

Figure 25 is the schematic diagram that in one embodiment of the invention, two common mode inductances use the 4th coupled modes.

Figure 26 is the schematic diagram that in one embodiment of the invention, two common mode inductances use the 5th coupled modes.

Figure 27 is the schematic diagram that in one embodiment of the invention, two common mode inductances use the 6th coupled modes.

Figure 28 is the schematic diagram that in one embodiment of the invention, inductance and transformer use the first coupled modes.

Figure 29 is the schematic diagram that in one embodiment of the invention, inductance and transformer use the second coupled modes.

Figure 30 is the schematic diagram that in one embodiment of the invention, inductance and transformer use the 3rd coupled modes.

Figure 31 is the schematic diagram that in one embodiment of the invention, inductance and transformer use the 4th coupled modes.

Figure 32 is the schematic diagram that in one embodiment of the invention, inductance and transformer use the 5th coupled modes.

Figure 33 is the schematic diagram that in one embodiment of the invention, inductance and transformer use the 6th coupled modes.

Figure 34 is the schematic diagram that in one embodiment of the invention, inductance and transformer use the 7th coupled modes.

Figure 35 is the schematic diagram that in one embodiment of the invention, inductance and transformer use the 8th coupled modes.

Figure 36 is the schematic diagram that in one embodiment of the invention, common mode inductance and transformer use the first coupled modes.

Figure 37 is the schematic diagram that in one embodiment of the invention, common mode inductance and transformer use the second coupled modes.

Figure 38 is the schematic diagram that in one embodiment of the invention, common mode inductance and transformer use the 3rd coupled modes.

Figure 39 is the schematic diagram that in one embodiment of the invention, common mode inductance and transformer use the 4th coupled modes.

Figure 40 is the schematic diagram that in one embodiment of the invention, common mode inductance and transformer use the 5th coupled modes.

Figure 41 is the schematic diagram that in one embodiment of the invention, common mode inductance and transformer use the 6th coupled modes.

Figure 42 is the schematic diagram that in one embodiment of the invention, common mode inductance and transformer use the 7th coupled modes.

Figure 43 is the schematic diagram that in one embodiment of the invention, common mode inductance and transformer use the 8th coupled modes.

Figure 44 is the schematic diagram that in one embodiment of the invention, two transformer baies use the first coupled modes.

Figure 45 is the schematic diagram that in one embodiment of the invention, two transformer baies use the second coupled modes.

Figure 46 is the schematic diagram that in one embodiment of the invention, two transformer baies use the 3rd coupled modes.

Figure 47 is the schematic diagram that in one embodiment of the invention, two transformer baies use the 4th coupled modes.

Figure 48 is the schematic diagram that in one embodiment of the invention, two transformer baies use the 5th coupled modes.

Figure 49 is the schematic diagram that in one embodiment of the invention, two transformer baies use the 6th coupled modes.

Figure 50 is the schematic diagram that in one embodiment of the invention, two transformer baies use the 7th coupled modes.

Figure 51 is the schematic diagram that in one embodiment of the invention, two transformer baies use the 8th coupled modes.

Figure 52 is the schematic diagram that in one embodiment of the invention, two transformer baies use the 9th coupled modes.

Figure 53 is the schematic diagram that in one embodiment of the invention, two transformer baies use the tenth coupled modes.

Figure 54 is the schematic diagram that in one embodiment of the invention, two transformer baies use the 11st coupled modes.

Figure 55 is the schematic diagram that in one embodiment of the invention, two transformer baies use the 12nd coupled modes.

Detailed description of the invention

Below in conjunction with the accompanying drawings, technical scheme is specifically described.

The present invention proposes a kind of separate magnetic element coupling circuit and control method thereof.This separate magnetic element coupling circuit includes the first separate magnetic element and the second magnetic element；Rotating around being shaped with additional winding on first magnetic element and on the second magnetic element, and additional winding forms loop by a connection impedance, thus sets up the coupled relation of described first magnetic element and described second magnetic element.

Further, be illustrated by the following example the present invention propose separate magnetic element coupling control method:

Embodiment one

In the present embodiment, by regulating the resistance value of described connection impedance, thus described first magnetic element and the coupled relation of the second magnetic element are adjusted.

Embodiment two

In the present embodiment, by inductance value and the mutual induction amount of described first magnetic element of the described first additional winding of magnetic element of regulation, regulate the inductance value of the described second additional winding of magnetic element and the mutual induction amount of described two magnetic elements, thus adjust described first magnetic element and the coupled relation of the second magnetic element.

Embodiment three

In the present embodiment, by regulating the resistance value of described connection impedance, regulating the described inductance value of the first additional winding of magnetic element and the mutual induction amount of described first magnetic element and regulate the inductance value of the described second additional winding of magnetic element and the mutual induction amount of described two magnetic elements, thus adjust described first magnetic element and the coupled relation of the second magnetic element.

Further, in embodiment one to three, if needing multiple discrete magnetic parts form coupling and control, can realize coupling and the control of multiple discrete magnetic part by controlling coupling between any two.

A kind of separate magnetic element in order to allow those skilled in the art further appreciate that method of the present invention proposes couples circuit and control method thereof, illustrates below in conjunction with instantiation.

Below as a example by the coupling between two separate inductors, the present invention will be described.

If: the first magnetic element self-inductance is L₁, the second magnetic element self-inductance be L₂, the equivalent near-field coupling of two windings is M₁₂, as shown in Figure 4.

Then:

${\stackrel{\·}{U}}_2=j\mathrm{\ω}\·(L_2\·{\stackrel{\·}{I}}_2+M_{12}\·{\stackrel{\·}{I}}_1)---\left(1\right)$

If:Formula (1) can turn to:

${\stackrel{\·}{U}}_2=j\·\mathrm{\ω}\·M_{12}\·{\stackrel{\·}{I}}_1---\left(2\right)$

Mutual inductance M₁₂For:

$M_{12}=\frac{{\stackrel{\·}{U}}_2}{j\·\mathrm{\ω}\·{\stackrel{\·}{I}}_1}---\left(3\right)$

It is located at the two additional winding of independent inductive element and impedances, as it is shown in figure 5, wherein: L₁, L₂It is respectively the self-inductance of two separate inductors；And described first magnetic element and described second magnetic element mutual two are independently；L_1aBeing the self-induction of the first additional winding of magnetic element, this additional winding is referred to as the first additional winding；L_2aBeing the self-induction of the second additional winding of magnetic element, this additional winding is referred to as the second additional winding；M₁, M₂It is respectively the first magnetic element and the first additional winding, the mutual inductance between the second magnetic element and the second additional winding, the Same Name of Ends of corresponding two coupling inductances in the end of dotted line.Z₁₂For additional impedance.

In Fig. 5 four inductance are decoupled.For decoupling convenience, an end of additional winding can be received and (not affect decoupling result), as shown in Fig. 6～Fig. 7 on the first magnetic element and the second magnetic element.Its decoupling equivalent circuit diagram can be obtained as shown in Figure 8 according to decoupling general principle.

Can be obtained by Fig. 8:

${\stackrel{\·}{U}}_2={\stackrel{\·}{I}}_1\·\frac{j\·\mathrm{\ω}\·M_1\·j\·\mathrm{\ω}\·M_2}{j\·\mathrm{\ω}\·M_1+j\·\mathrm{\ω}\·(L_{1a}-M_1)+Z_{12}+j\·\mathrm{\ω}\·(L_{2a}-M_2)+j\·\mathrm{\ω}\·M_2}---\left(4\right)$

Can be obtained by formula (3) and (4):

$M_{12}=\frac{{\stackrel{\·}{U}}_2}{j\·\mathrm{\ω}\·{\stackrel{\·}{I}}_1}=\frac{M_1\·M_2}{L_{1a}+L_{2a}+\frac{Z_{12}}{j\·\mathrm{\ω}}}---\left(5\right)$

From formula (5), by changing M₁, M₂, L_1a, L_2aOr Z₁₂M can be realized₁₂Regulation.

In order to allow those skilled in the art further appreciate that method proposed by the invention, illustrate below in conjunction with specific embodiment.

1). work as Z₁₂=L₀Time, formula (5) can turn to:

$M_{12}=\frac{M_1\·M_2}{L_{1a}+L_{2a}+L_0}---\left(6\right)$

Then M₁₂For pure inductance, by regulation L_1a, L_2a, M₁, M₂, L₀M can be realized₁₂Regulation.Work as L₁=L₂=12.2 μ H, L_1a=4.56 μ H, L_2a=0.53 μ H, M₁=7.2 μ H, M₂During=2.28 μ H, M₁₂With L₀The curve of change is as shown in Figure 9.Work as L₀When=0, M₁₂Maximum；Work as L₀During increase, M₁₂Reduce；L₀Time infinitely great, M₁₂=0, L₁And L₂Without coupling.

In actual application, L can be selected according to concrete demand₁, L₂, L_1a, L_2a, M₁, M₂And L₀Value.

2). work as Z₁₂During=R, formula (5) can turn to:

$M_{12}=\frac{M_1\·M_2}{L_{1a}+L_{2a}+\frac{R}{j\·\mathrm{\ω}}}---\left(7\right)$

Formula (7) can abbreviation be:

$M_{12}=j\·\frac{M_1\·M_2\·\frac{R}{\mathrm{\ω}}}{{(L_{1a}+L_{2a})}^2+{\left(\frac{R}{\mathrm{\ω}}\right)}^2}+\frac{M_1\·M_2\·(L_{1a}+L_{2a})}{{(L_{1a}+L_{2a})}^2+{\left(\frac{R}{\mathrm{\ω}}\right)}^2}---\left(8\right)$

If:

$L_{eq}=\frac{M_1\·M_2\·(L_{1a}+L_{2a})}{{(L_{1a}+L_{2a})}^2+{\left(\frac{R}{\mathrm{\ω}}\right)}^2},R_{eq}=j\·\frac{M_1\·M_2\·\frac{R}{\mathrm{\ω}}}{{(L_{1a}+L_{2a})}^2+{\left(\frac{R}{\mathrm{\ω}}\right)}^2}$

Then M₁₂Not being pure inductance, the real part of mutual inductance is also by regulation L with frequency change with frequency change imaginary part_1a, L_2a, M₁, M₂, L₀Realize M₁₂Regulation.

Work as L₁=L₂=12.2 μ H, L_1a=4.56 μ H, L_2a=0.53 μ H, M₁=7.2 μ H, M₂During=2.28 μ H, L_eq, R_eqWhen f=150kHz with R change curve as shown in Figure 10.As R=0, L_eqMaximum, R_eq=0；When R increases, L_eqReduce, R_eqFirst reduce and increase afterwards；During R infinity, L_eq=0 and R_eq=0, L₁And L₂Without coupling.

Work as L₁=L₂=12.2 μ H, L_1a=4.56 μ H, L_2a=0.53 μ H, M₁=7.2 μ H, M₂During=2.28 μ H, L_eq, R_eqWhen R=7.2 Ω with f change curve as shown in figure 11.As f=150kHz, L_eqMinimum, R_eqAbsolute value is minimum；When f increases, L_eqIncrease, R_eqAbsolute value increases.

When f infinity,R_eq=0.

3). work as Z₁₂During=C, formula (5) can turn to:

$M_{12}=\frac{M_1\·M_2}{L_{1a}+L_{2a}+\frac{1}{j\·w\·j\·w\·C}}=\frac{M_1\·M_2}{L_{1a}+L_{2a}-\frac{1}{w^2\·C}}---\left(9\right)$

Work as L₁=L₂=12.2 μ H, L_1a=4.56 μ H, L_2a=0.53 μ H, M₁=7.2 μ H, M₂During=2.28 μ H, M₁₂When f=150kHz with C change curve as shown in figure 12.When C is close to 0, M₁₂≈ 0, L₁, L₂Without coupling；Along with the increase of C, M₁₂It is gradually increased to infinity for negative value and absolute value；When C continues to increase, M₁₂For just and being then gradually reduced for infinity, when C is infinitely great: M₁₂=M₁·M₂/(L_1a+L_2a)。

Work as L₁=L₂=12.2 μ H, L_1a=4.56 μ H, L_2a=0.53 μ H, M₁=7.2 μ H, M₂During=2.28 μ H, M₁₂When C=1 μ F with C change curve as shown in figure 13.As f=150kHz, M₁₂Maximum；Along with the increase of f, M₁₂It is gradually reduced；When f is infinitely great, M₁₂Minimum, M₁₂=M₁·M₂/(L_1a+L_2a)。

4). work as Z₁₂When=0, formula (5) can turn to:

$M_{12}=\frac{M_1\·M_2}{L_{1a}+L_{2a}}---\left(10\right)$

The coefficient of coup remembering described first magnetic element and described first additional winding is k₁；The coefficient of coup of described second magnetic element and described second additional winding is k₂, then:

$M_{12}=\frac{k_1\·k_2\·\sqrt{L_1\·L_2\·L_{1a}\·L_{2a}}}{L_{1a}+L_{2a}}---\left(11\right)$

Due to:Then:By regulation coefficient of coup k₁, k₂And L_1a, L_2aValue, i.e. obtainIn the range of all inductance value.

5).Z₁₂Can be inductance L₀, electric capacity C and any combination of resistance R, Z₁₂For inductance L₀With the combination of electric capacity C, inductance L₀With the combination of resistance R, electric capacity C and the combination of resistance R or inductance L₀, electric capacity C and the combination of resistance R, by regulation L_1a, L_2a, M₁, M₂, Z₁₂Realize M₁₂Regulation.

Further, in the present embodiment, two separate magnetic element are applied outer winding, external impedance, outer winding can use single-turn circular coil chain to cross magnetic element and be formed, may be used without multiturn coil chain to cross magnetic element and formed, the direction that couples of magnetic element and outer winding comprises forward coupling and reverse coupled two kinds, and two magnetic elements can select the type of outer winding the most voluntarily and couple direction.It is embodied as including but are not limited to shown in accompanying drawing 14 to Figure 55, wherein, if Figure 14-18 is that two separate inductors apply outer winding, if Figure 18-21 is that inductance applies outer winding with common mode inductance, if Figure 22-27 is that two independent common mode inductances apply outer winding, if Figure 28-35 is that inductance applies outer winding with Transformer Winding, if Figure 36-43 is that common mode inductance applies outer winding with Transformer Winding, if Figure 44-55 is that two transformer each windings respective apply outer winding.The coupling of multiple discrete magnetic parts can obtain by the coupling of two discrete magnetic parts being extended.

It is above presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, when produced function is without departing from the scope of technical solution of the present invention, belong to protection scope of the present invention.

Claims (10)

1. a separate magnetic element coupling circuit, it is characterised in that include the first separate magnetic element and the second magnetic element；Rotating around being shaped with additional winding on described first magnetic element and on described second magnetic element, described additional winding forms loop by a connection impedance, thus sets up the coupled relation of described first magnetic element and described second magnetic element.

2. the control method coupling circuit based on a kind of separate magnetic element described in claim 1, it is characterised in that by regulating the resistance value of described connection impedance, thus adjust the coupled relation of described first magnetic element and described second magnetic element.

A kind of separate magnetic element coupling control method the most according to claim 2, it is characterised in that described connection impedance is combination or the combination of inductance, electric capacity and resistance of the combination of the combination of inductance and electric capacity, inductance and resistance, electric capacity and resistance.

A kind of separate magnetic element coupling control method the most according to claim 2, it is characterised in that by coupling between magnetic element two-by-two and control in multiple separate magnetic elements, it is achieved the coupling of multiple magnetic elements and control.

5. the control method coupling circuit based on a kind of separate magnetic element described in claim 1, it is characterized in that, by inductance value and the mutual induction amount of described first magnetic element of the described first additional winding of magnetic element of regulation, regulate the inductance value of the described second additional winding of magnetic element and the mutual induction amount of described two magnetic elements, thus adjust described first magnetic element and the coupled relation of the second magnetic element.

A kind of separate magnetic element coupling control method the most according to claim 5, it is characterised in that described connection impedance is combination or the combination of inductance, electric capacity and resistance of the combination of the combination of inductance and electric capacity, inductance and resistance, electric capacity and resistance.

A kind of separate magnetic element coupling control method the most according to claim 5, it is characterised in that by coupling between magnetic element two-by-two and control in multiple separate magnetic elements, it is achieved the coupling of multiple magnetic elements and control.

8. the control method coupling circuit based on a kind of separate magnetic element described in claim 1, it is characterized in that, by regulating the resistance value of described connection impedance, regulating the described inductance value of the first additional winding of magnetic element and the mutual induction amount of described first magnetic element and regulate the inductance value of the described second additional winding of magnetic element and the mutual induction amount of described two magnetic elements, thus adjust described first magnetic element and the coupled relation of the second magnetic element.

A kind of separate magnetic element coupling control method the most according to claim 8, it is characterised in that described connection impedance is combination or the combination of inductance, electric capacity and resistance of the combination of the combination of inductance and electric capacity, inductance and resistance, electric capacity and resistance.

A kind of separate magnetic element coupling control method the most according to claim 8, it is characterised in that by coupling between magnetic element two-by-two and control in multiple separate magnetic elements, it is achieved the coupling of multiple magnetic elements and control.