CN103943307A - Interleaving parallel coupling inductor and converter - Google Patents

Abstract

The embodiment of the invention provides an interleaving parallel coupling inductor which comprises at least four magnetic columns. Phase angles of the input voltages of the at least four magnetic columns differ by preset angles in sequence so that the numerical values of the magnetic flux density of a cross yoke of the interleaving parallel coupling inductor circulate to be positive values and negative values or circulate to be negative values and positive values in a switching cycle. The embodiment of the invention further provides a converter. According to the technical scheme of the embodiment, the losses of iron cores of the interleaving parallel coupling inductor can be lowered.

Description

A kind of crisscross parallel coupling inductance and converter

[technical field]

The present invention relates to electric and electronic technical field, relate in particular to a kind of crisscross parallel coupling inductance and converter.

[background technology]

At present, coupling inductance, as crisscross parallel coupling inductance, obtains a wide range of applications at electric and electronic technical field.At converters, as DC-DC converter, middle employing crisscross parallel coupling inductance, can obviously improve dynamic property and the efficiency of converters, reduces significantly volume and the cost of converters.In converters, generally utilize two magnetic posts, three magnetic posts or four magnetic posts to realize crisscross parallel coupling inductance.

In prior art, crisscross parallel coupling inductance, as adopt the crisscross parallel coupling scheme of four magnetic posts, the phase angle of the input voltage of four magnetic posts to be followed successively by 0 °, α, 2 α and 3 α.But, the phase angle of the input voltage of four magnetic posts has differed certain angle [alpha] successively, can cause the magnetic flux density in the horizontal yoke of crisscross parallel coupling inductance to occur stack, thereby cause the core loss of crisscross parallel coupling inductance sharply to rise, make the hydraulic performance decline of crisscross parallel coupling inductance.

[summary of the invention]

In view of this, the embodiment of the present invention provides a kind of crisscross parallel coupling inductance and converter, can reduce the core loss of crisscross parallel coupling inductance.

First aspect, the embodiment of the present invention provides a kind of crisscross parallel coupling inductance, comprising: at least four magnetic posts; The phase angle of the input voltage of described at least four magnetic posts differs default angle successively, taking make described crisscross parallel coupling inductance horizontal yoke magnetic flux density numerical value switch periods cocycle as on the occasion of with negative value or circulation as negative value and on the occasion of.

In the possible implementation of the first of first aspect, described crisscross parallel coupling inductance comprises the first magnetic post, the second magnetic post, the 3rd magnetic post and the 4th magnetic post;

The phase angle of the input voltage of described the first magnetic post is θ, described 0≤θ≤360 °;

The phase angle of the phase angle of the phase angle of the input voltage of described the second magnetic post, the input voltage of the 3rd magnetic post and the input voltage of the 4th magnetic post is respectively: 2 α+θ, α+θ and 3 α+θ;

α is unit angle, and the angle α of described unit equals described N represents the number of magnetic post in described crisscross parallel coupling inductance, and described ω is the adjustment angle of presetting.

In the possible implementation of the second of first aspect, described crisscross parallel coupling inductance comprises the first magnetic post, the second magnetic post, the 3rd magnetic post and the 4th magnetic post;

The phase angle of the input voltage of described the first magnetic post is θ, described 0≤θ≤360 °;

The phase angle of the phase angle of the phase angle of the input voltage of described the second magnetic post, the input voltage of the 3rd magnetic post and the input voltage of the 4th magnetic post is respectively: 2 α+θ, 3 α+θ and α+θ;

α is unit angle, and the angle α of described unit equals described N represents the number of magnetic post in described crisscross parallel coupling inductance, and described ω is the adjustment angle of presetting.

In the third possible implementation of first aspect, described crisscross parallel coupling inductance comprises the first magnetic post, the second magnetic post, the 3rd magnetic post and the 4th magnetic post;

The phase angle of the input voltage of described the first magnetic post is θ, described 0≤θ≤360 °;

The phase angle of the phase angle of the phase angle of the input voltage of described the second magnetic post, the input voltage of the 3rd magnetic post and the input voltage of the 4th magnetic post is respectively: θ-2 α, θ-α and θ+α;

α is unit angle, and the angle α of described unit equals described N represents the number of magnetic post in described crisscross parallel coupling inductance, and described ω is the adjustment angle of presetting.

In the 4th kind of possible implementation of first aspect, described crisscross parallel coupling inductance comprises the first magnetic post, the second magnetic post, the 3rd magnetic post and the 4th magnetic post;

The phase angle of the input voltage of described the first magnetic post is θ, described 0≤θ≤360 °;

The phase angle of the phase angle of the phase angle of the input voltage of described the second magnetic post, the input voltage of the 3rd magnetic post and the input voltage of the 4th magnetic post is respectively: θ-2 α, θ+α and θ-α;

α is unit angle, and the angle α of described unit equals described N represents the number of magnetic post in described crisscross parallel coupling inductance, and described ω is the adjustment angle of presetting.

Second aspect, the embodiment of the present invention also provides a kind of converter, and described converter comprises above-mentioned crisscross parallel coupling inductance.

In the possible implementation of the first of second aspect, described converter also comprises at least one in power conversion circuit and filter circuit.

As can be seen from the above technical solutions, the embodiment of the present invention has following beneficial effect:

In the case of the structure and control algolithm that do not change existing crisscross parallel coupling inductance, only by changing the stagger angle of each magnetic intercolumniation in crisscross parallel coupling inductance, make the magnetic flux density in the horizontal yoke of crisscross parallel coupling inductance positive and negative staggered, thereby the magnetic flux density in horizontal yoke can be cancelled out each other, like this, magnetic flux density in horizontal yoke will reduce, therefore can reduce the core loss of crisscross parallel coupling inductance, reduce the energy loss of crisscross parallel coupling inductance, improve the performance of crisscross parallel coupling inductance.

[brief description of the drawings]

In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the schematic diagram of the crisscross parallel coupling inductance one that provides of the embodiment of the present invention;

Fig. 2 is the schematic diagram of the crisscross parallel coupling inductance two that provides of the embodiment of the present invention;

Fig. 3 (a)～Fig. 3 (d) is the schematic diagram at the phase angle of 4 road input voltages of crisscross parallel coupling inductance in prior art;

Fig. 4 is the horizontal yoke schematic diagram of crisscross parallel coupling inductance in prior art;

Fig. 5 (a)～Fig. 5 (d) is the schematic diagram at the phase angle of 4 road input voltages of the crisscross parallel coupling inductance that provides of the embodiment of the present invention;

Fig. 6 is the ratio schematic diagram of the magnetic flux density of the magnetic flux density of crisscross parallel coupling inductance that provides of the embodiment of the present invention and the crisscross parallel coupling inductance of prior art;

Fig. 7 is the ratio schematic diagram of the core loss of crisscross parallel coupling inductance of the embodiment of the present invention and the core loss of the crisscross parallel coupling inductance of prior art scheme.

Fig. 8 (a)～Fig. 8 (e) is the schematic diagram at the phase angle of 5 road input voltages of the crisscross parallel coupling inductance that provides of the embodiment of the present invention.

[embodiment]

Technical scheme for a better understanding of the present invention, is described in detail the embodiment of the present invention below in conjunction with accompanying drawing.

Should be clear and definite, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.

The embodiment of the present invention provides a kind of crisscross parallel coupling inductance, and described crisscross parallel coupling inductance comprises at least four magnetic posts; The phase angle of the input voltage of described at least four magnetic posts differs default angle successively, taking make described crisscross parallel coupling inductance horizontal yoke magnetic flux density numerical value switch periods cocycle as on the occasion of with negative value or circulation as negative value and on the occasion of.

Please refer to Fig. 1, the schematic diagram of its crisscross parallel coupling inductance one providing for the embodiment of the present invention, as shown in the figure, preferred, this crisscross parallel coupling inductance can comprise four magnetic posts, i.e. the first magnetic post, the second magnetic post, the 3rd magnetic post and the 4th magnetic post.

Wherein, described crisscross parallel coupling inductance comprises 4 road input voltages, i.e. the input voltage v of the first magnetic post ₁, the second magnetic post input voltage v ₂, the 3rd magnetic post input voltage v ₃, the 4th magnetic post input voltage v ₄; This 4 road input voltage need to differ certain angle successively, can realize the crisscross parallel coupling inductance of four magnetic posts.Described crisscross parallel coupling inductance also comprises 1 road output voltage, i.e. output voltage v shown in Fig. 1 ₀.Described horizontal yoke refers to the crossbeam of crisscross parallel coupling inductance, and in crisscross parallel coupling inductance, magnetic post and horizontal yoke connect to form a closed-loop path.

In the embodiment of the present invention, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle and the input voltage v of the 4th magnetic post ₄phase angle be respectively: 2 α+θ, α+θ and 3 α+θ.

For example,, if the input voltage v of the first magnetic post ₁phase angle be 0 °, the input voltage v of the second magnetic post ₂phase angle equal 2 α, the input voltage v of the second magnetic post ₂with respect to the input voltage v of the first magnetic post ₁phase angle also equal 2 α, the input voltage v of the 3rd magnetic post ₃phase angle equal α, the input voltage v of the 3rd magnetic post ₃with respect to the input voltage v of the first magnetic post ₁phase angle also equal α, the input voltage v of the 4th magnetic post ₄phase angle equal 3 α, the input voltage v of the 4th magnetic post ₄with respect to the input voltage v of the first magnetic post ₁phase angle also equal 3 α.Wherein, the input voltage v of the second magnetic post ₂with respect to the input voltage v of the first magnetic post ₁phase angle equal 2 α and refer to: with the input voltage v of the first magnetic post ₁0 °, phase angle be benchmark, during with respect to 0 °, phase angle, the input voltage v of the second magnetic post ₂phase angle be 2 α.

Or, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle and the input voltage v of the 4th magnetic post ₄phase angle be respectively: 2 α+θ, 3 α+θ and α+θ.

For example,, if the input voltage v of the first magnetic post ₁phase angle be 0 °, the input voltage v of the second magnetic post ₂phase angle equal 2 α, the input voltage v of the second magnetic post ₂with respect to the input voltage v of the first magnetic post ₁phase angle also equal 2 α, the input voltage v of the 3rd magnetic post ₃phase angle equal 3 α, the input voltage v of the 3rd magnetic post ₃with respect to the input voltage v of the first magnetic post ₁phase angle also equal 3 α, the input voltage v of the 4th magnetic post ₄phase angle equal α, the input voltage v of the 4th magnetic post ₄with respect to the input voltage v of the first magnetic post ₁phase angle also equal α.

Or, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle and the input voltage v of the 4th magnetic post ₄phase angle be respectively: θ-2 α, θ-α and θ+α.

For example,, if the input voltage v of the first magnetic post ₁phase angle be 2 α, the input voltage v of the second magnetic post ₂phase angle equal 0 °, the input voltage v of the second magnetic post ₂with respect to the input voltage v of the first magnetic post ₁phase angle equal-2 α, the input voltage v of the 3rd magnetic post ₃phase angle equal α, the input voltage v of the 3rd magnetic post ₃with respect to the input voltage v of the first magnetic post ₁equal-α of phase angle, the input voltage v of the 4th magnetic post ₄phase angle equal 3 α, the input voltage v of the 4th magnetic post ₄with respect to the input voltage v of the first magnetic post ₁phase angle equal α.

Or, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle and the input voltage v of the 4th magnetic post ₄phase angle be respectively: θ-2 α, θ+α and θ-α.

For example,, if the input voltage v of the first magnetic post ₁phase angle be 2 α, the input voltage v of the second magnetic post ₂phase angle equal 0 °, the input voltage v of the second magnetic post ₂with respect to the input voltage v of the first magnetic post ₁phase angle equal-2 α, the input voltage v of the 3rd magnetic post ₃phase angle equal 3 α, the input voltage v of the 3rd magnetic post ₃with respect to the input voltage v of the first magnetic post ₁phase angle equal α, the input voltage v of the 4th magnetic post ₄phase angle equal α, the input voltage v of the 4th magnetic post ₄with respect to the input voltage v of the first magnetic post ₁equal-α of phase angle.

Please refer to Fig. 2, the schematic diagram of its crisscross parallel coupling inductance two providing for the embodiment of the present invention, as shown in the figure, preferred, this crisscross parallel coupling inductance can comprise five magnetic posts, i.e. the first magnetic post, the second magnetic post, the 3rd magnetic post, the 4th magnetic post and the 5th magnetic post.

Wherein, described crisscross parallel coupling inductance comprises 5 road input voltages, i.e. the input voltage v of the first magnetic post ₁, the second magnetic post input voltage v ₂, the 3rd magnetic post input voltage v ₃, the 4th magnetic post input voltage v ₄input voltage v with the 5th magnetic post ₅; This 5 road input voltage need to differ certain angle successively, can realize the crisscross parallel coupling inductance of five magnetic posts.Described crisscross parallel coupling inductance also comprises 1 road output voltage, i.e. output voltage v shown in Fig. 2 ₀.

In the embodiment of the present invention, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle, the input voltage v of the 4th magnetic post ₄phase angle and the input voltage v of the 5th magnetic post ₅phase angle be respectively: 2 α+θ, 3 α+θ, α+θ and 4 α+θ.

For example,, if the input voltage v of the first magnetic post ₁phase angle be 0 °, the input voltage v of the second magnetic post ₂phase angle equal 2 α, the input voltage v of the second magnetic post ₂with respect to the input voltage v of the first magnetic post ₁phase angle also equal 2 α, the input voltage v of the 3rd magnetic post ₃phase angle equal 3 α, the input voltage v of the 3rd magnetic post ₃with respect to the input voltage v of the first magnetic post ₁phase angle also equal 3 α, the input voltage v of the 4th magnetic post ₄phase angle equal α, the input voltage v of the 4th magnetic post ₄with respect to the input voltage v of the first magnetic post ₁phase angle also equal α, the input voltage v of the 5th magnetic post ₅phase angle equal 4 α, the input voltage v of the 5th magnetic post ₅with respect to the input voltage v of the first magnetic post ₁phase angle also equal 4 α.Wherein, the input voltage v of the second magnetic post ₂with respect to the input voltage v of the first magnetic post ₁phase angle equal 2 α and refer to: with the input voltage v of the first magnetic post ₁0 °, phase angle be benchmark, during with respect to 0 °, phase angle, the input voltage v of the second magnetic post ₂phase angle be 2 α.

Or, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle, the input voltage v of the 4th magnetic post ₄phase angle and the input voltage v of the 5th magnetic post ₅phase angle be respectively: 2 α+θ, 3 α+θ, 4 α+θ and α+θ.

Or, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle, the input voltage v of the 4th magnetic post ₄phase angle and the input voltage v of the 5th magnetic post ₅phase angle be respectively: 2 α+θ, 4 α+θ, 3 α+θ and α+θ.

Or, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle, the input voltage v of the 4th magnetic post ₄phase angle and the input voltage v of the 5th magnetic post ₅phase angle be respectively: 2 α+θ, 4 α+θ, α+θ and 3 α+θ.

Or, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle, the input voltage v of the 4th magnetic post ₄phase angle and the input voltage v of the 5th magnetic post ₅phase angle be respectively: 3 α+θ, α+θ, 2 α+θ and 4 α+θ.

Or, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle, the input voltage v of the 4th magnetic post ₄phase angle and the input voltage v of the 5th magnetic post ₅phase angle be respectively: 3 α+θ, α+θ, 4 α+θ and 2 α+θ.

Or, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle, the input voltage v of the 4th magnetic post ₄phase angle and the input voltage v of the 5th magnetic post ₅phase angle be respectively: 3 α+θ, 2 α+θ, α+θ and 4 α+θ.

Or, if the input voltage v of described the first magnetic post ₁phase angle be θ, the input voltage v of described the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle, the input voltage v of the 4th magnetic post ₄phase angle and the input voltage v of the 5th magnetic post ₅phase angle be respectively: 3 α+θ, 2 α+θ, 4 α+θ and α+θ.

In the embodiment of the present invention, the input voltage v of described the first magnetic post ₁to be that θ can equal arbitrarily angled at phase angle, i.e. described 0≤θ≤360 °.

In the embodiment of the present invention, α represents staggered unit angle, staggered unit angle wherein, N represents the number of magnetic post in crisscross parallel coupling inductance, when in the embodiment of the present invention, crisscross parallel coupling inductance comprises four magnetic posts, crisscross parallel coupling inductance is exactly four staggered, N equals 4, when in the embodiment of the present invention, crisscross parallel coupling inductance comprises five magnetic posts, crisscross parallel coupling inductance is exactly five staggered, and N equals 5.

Wherein, ω represents the adjustment angle of presetting, for example, and 0≤ω≤5 °.

N equals at 4 o'clock, and α equals , represent that α can change near 90 °.

N equals at 5 o'clock, and α equals , represent that α can change near 72 °.

The embodiment of the present invention also provides a kind of converter, and described converter comprises above-mentioned crisscross parallel coupling inductance.

Optionally, described converter also comprises at least one in power conversion circuit and filter circuit.

It should be noted that, in the embodiment of the present invention, the magnetic post in crisscross parallel coupling inductance comprises iron core and around the coil on this iron core, the input voltage of magnetic post refers to the input voltage on magnetic post coil.

Embodiment mono-

In the present embodiment, with the input voltage v of the first magnetic post ₁phase angle be 0 °, the input voltage v of the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle and the input voltage v of the 4th magnetic post ₄phase angle be respectively 2 α, α and 3 α are that example describes, α=90 °.

Please refer to Fig. 3 (a)～Fig. 3 (d), it is the schematic diagram at the phase angle of 4 road input voltages of crisscross parallel coupling inductance in prior art, as shown in Fig. 3 (a)～Fig. 3 (d), and the input voltage v of the first magnetic post ₁phase angle be 0 °, the input voltage v of the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle and the input voltage v of the 4th magnetic post ₄phase angle be respectively α, 2 α and 3 α with respect to the phase angle of the input voltage of described the first magnetic post.Wherein, transverse axis represents a switch periods, and a switch periods is 360 °, and the duty ratio D that Fig. 3 (a)～Fig. 3 (d) is corresponding is respectively: 0≤D≤0.25,0.25≤D≤0.5,0.5≤D≤0.75 and 0.75≤D≤1.Wherein, duty ratio equals the service time of defeated people's voltage and the ratio of switch periods, and service time is as the service time of mark in Fig. 3 (a); As shown in Fig. 3 (a), a shade equals service time in the length of transverse axis, in Fig. 3 (a), shade is only signal in the length of transverse axis, in fact the service time of each input voltage can be greater than or equal to 0 and be less than or equal to 1/4 of switch periods, therefore the duty ratio D that, Fig. 3 (a) is corresponding meets 0≤D≤0.25; In like manner, in Fig. 3 (b) service time of each input voltage can be greater than or equal to switch periods 1/4 and be less than or equal to 1/2 of switch periods, therefore, the duty ratio D that Fig. 3 (b) is corresponding meets 0.25≤D≤0.5; In Fig. 3 (c) service time of each input voltage can be greater than or equal to switch periods 1/2 and be less than or equal to 3/4 of switch periods, therefore, the duty ratio D that Fig. 3 (c) is corresponding meets 0.5≤D≤0.75; In Fig. 3 (d) service time of each input voltage can be greater than or equal to switch periods 3/4 and be less than or equal to switch periods, therefore, the duty ratio D that Fig. 3 (d) is corresponding meets 0.75≤D≤1.Wherein, switch periods refers to the time interval of adjacent twice appearance of each input voltage.

Please refer to Fig. 4, it is the horizontal yoke schematic diagram of crisscross parallel coupling inductance in prior art, and as shown in Fig. 3 (a)～Fig. 3 (d), the voltage that in Fig. 4, in shadow region, iron core bears is (v ₁+ v ₂-v ₃-v ₄)/2, the magnetic flux density in this voltage and horizontal yoke is linear, in a switch periods, (the v in 0～90 ° of interval and 90 °～180 ° intervals ₁+ v ₂-v ₃-v ₄)/2 are being all for just, and magnetic flux density is being all for just, in 180 °～270 ° intervals with 270 °～360 ° intervals in (v ₁+ v ₂-v ₃-v ₄)/2 are all negative, be that magnetic flux density is all negative, therefore in the horizontal yoke of crisscross parallel coupling inductance, the phenomenon of magnetic flux density stack will be there is, thereby according to superposeing if there is magnetic flux density in magnetic material, the theory of the core loss that causes magnetic material is known, the crisscross parallel coupling inductance of prior art will exist due to the magnetic flux density core loss causing that superposes, thereby causes the energy loss of crisscross parallel coupling inductance.

Please refer to Fig. 5 (a)～Fig. 5 (d), the schematic diagram at the phase angle of 4 road input voltages of its crisscross parallel coupling inductance providing for the embodiment of the present invention, as shown in Fig. 5 (a)～Fig. 5 (d), the input voltage v of the first magnetic post ₁phase angle be 0 °, the input voltage v of the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle and the input voltage v of the 4th magnetic post ₄phase angle be respectively 2 α, α and 3 α.

In Fig. 5 (a)～Fig. 5 (d), transverse axis represents a switch periods, a switch periods equals 360 °, and the duty ratio D that Fig. 5 (a)～Fig. 5 (d) is corresponding is respectively: 0≤D≤0.25,0.25≤D≤0.5,0.5≤D≤0.75 and 0.75≤D≤1.

As shown in Fig. 5 (a)～Fig. 5 (d), the voltage that in Fig. 4, in shadow region, iron core bears is for equaling (v ₁+ v ₂-v ₃-v ₄)/2, in switch periods, (v in 0～90 ° of interval ₁+ v ₂-v ₃-v ₄)/2 are being for just, and magnetic flux density is being for just, (v in 90 °～180 ° intervals ₁+ v ₂-v ₃-v ₄)/2 are for negative, and magnetic flux density is negative, (v in 180 °～270 ° intervals ₁+ v ₂-v ₃-v ₄)/2 are being for just, and magnetic flux density is being for just, (v in 270 °～360 ° intervals ₁+ v ₂-v ₃-v ₄)/2 are for negative, be that magnetic flux density is negative, therefore the magnetic flux density in the horizontal yoke of crisscross parallel coupling inductance is positive and negative staggered, magnetic flux density in horizontal yoke can be cancelled out each other, magnetic flux density in horizontal yoke will reduce, therefore can reduce the core loss of crisscross parallel coupling inductance, reduce the energy loss of crisscross parallel coupling inductance.

Provide technology to compare prior art and the embodiment of the present invention, for different duty ratio D, the ratio of magnetic flux density B is:

$\frac{B_1\left(D\right)}{B_2\left(D\right)}=\left\{\begin{array}{cc}0.5& 0\≤D\≤0.25\\ \frac{1-2D}{2}& 0.25\≤D\≤0.5\\ \frac{2D-1}{2}& 0.5\≤D\≤0.75\\ 0.5& 0.75\≤D\≤1\end{array}\right.$

Wherein, B ₁(D) represent to utilize the magnetic flux density of the crisscross parallel coupling inductance that the embodiment of the present invention provides, B ₂(D) expression utilizes the magnetic flux density of the crisscross parallel coupling inductance of existing techniques in realizing.

Please refer to Fig. 6, the ratio schematic diagram of the magnetic flux density of crisscross parallel coupling inductance that it provides for the embodiment of the present invention and the magnetic flux density of the crisscross parallel coupling inductance of prior art, in conjunction with above-mentioned formula and Fig. 6, different taking than under D, value be less than all the time 1, that is to say, take than under D the magnetic flux density B of the crisscross parallel coupling inductance that the embodiment of the present invention provides in difference ₁(D) be less than all the time the magnetic flux density B of the crisscross parallel coupling inductance of prior art ₂(D).

Take iron core as example as amorphous band, the computing formula of core loss is:

P _core(W/kg)＝6.5f ^1.51B ^1.74

Wherein, P _core(W/kg) represent core loss, f represents switching frequency, and the unit of switching frequency f is kHz; B represents magnetic flux density, and the unit of magnetic flux density B is the T of tesla.

In equal duration, as shown in Fig. 3 (a), in prior art, the positive and negative variation of magnetic flux density is once, as shown in Fig. 5 (a), in the technical scheme of the embodiment of the present invention, the positive and negative variation of magnetic flux density is twice, therefore, and the magnetic flux density B of crisscross parallel coupling inductance ₁(D) corresponding switching frequency f is the magnetic flux density B of crisscross parallel coupling inductance ₂(D) twice of corresponding switching frequency f, thus the ratio of the core loss of the weight crisscross parallel coupling inductances such as acquisition is:

$\frac{P_{\mathrm{core}1}}{P_{\mathrm{core}2}}=2^{1.51}{\left(\frac{B_1\left(D\right)}{B_2\left(D\right)}\right)}^{1.74}$

Wherein, P _core1represent to utilize the core loss of the crisscross parallel coupling inductance that the embodiment of the present invention provides, P _core2represent the core loss of the crisscross parallel coupling inductance of utilizing prior art.

Please refer to Fig. 7, the ratio schematic diagram of the core loss of the core loss of the crisscross parallel coupling inductance that it is the embodiment of the present invention and the crisscross parallel coupling inductance of prior art scheme, as shown in Figure 7, different taking than under D, value be less than all the time 1, that is to say, take than under D the core loss P of crisscross parallel coupling inductance in the embodiment of the present invention in difference _core1all the time be less than the core loss P of crisscross parallel coupling inductance in prior art scheme _core2.

Embodiment bis-

In the present embodiment, with the input voltage v of the first magnetic post ₁phase angle be 0 °, the input voltage v of the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle, the input voltage v of the 4th magnetic post ₄phase angle and the input voltage v of the 5th magnetic post ₅to be respectively 2 α, 3 α, α and 4 α be that example describes at phase angle, α=72 °.

Please refer to Fig. 8 (a)～Fig. 8 (e), the schematic diagram at the phase angle of 5 road input voltages of its crisscross parallel coupling inductance providing for the embodiment of the present invention, as shown in Fig. 8 (a)～Fig. 8 (e), the input voltage v of the first magnetic post ₁phase angle be 0 °, the input voltage v of the second magnetic post ₂phase angle, the input voltage v of the 3rd magnetic post ₃phase angle, the input voltage v of the 4th magnetic post ₄phase angle and the input voltage v of the 5th magnetic post ₅phase angle be respectively 2 α, 3 α, α and 4 α.

In Fig. 8 (a)～Fig. 8 (e), transverse axis represents a switch periods, a switch periods equals 360 °, and the duty ratio D that Fig. 8 (a)～Fig. 8 (e) is corresponding is respectively: 0≤D≤0.2,0.2≤D≤0.4,0.4≤D≤0.6,0.6≤D≤0.8 and 0.8≤D≤1.

As shown in Fig. 8 (a), the voltage that in Fig. 4, in shadow region, iron core bears is for equaling (3v ₁+ 3v ₂-2v ₃-2v ₄-2v ₅)/5, in switch periods, (3v in 0～72 ° of interval ₁+ 3v ₂-2v ₃-2v ₄-2v ₅)/5 are being for just, and magnetic flux density is for just; In switch periods, (3v in 72 °～144 ° intervals ₁+ 3v ₂-2v ₃-2v ₄-2v ₅)/5 are for negative, and magnetic flux density is for negative; In switch periods, (3v in 144 °～216 ° intervals ₁+ 3v ₂-2v ₃-2v ₄-2v ₅)/5 are for just; In switch periods, (3v in 216 °～288 ° intervals ₁+ 3v ₂-2v ₃-2v ₄-2v ₅)/5 are for negative, therefore the magnetic flux density in the horizontal yoke of crisscross parallel coupling inductance is positive and negative staggered, magnetic flux density in horizontal yoke can be cancelled out each other, magnetic flux density in horizontal yoke will reduce, therefore can reduce the core loss of crisscross parallel coupling inductance, reduce the energy loss of crisscross parallel coupling inductance.

The technical scheme of the embodiment of the present invention has following beneficial effect:

In the case of the structure and control algolithm that do not change existing crisscross parallel coupling inductance, only by changing the stagger angle of each magnetic intercolumniation in crisscross parallel coupling inductance, make the magnetic flux density in the horizontal yoke of crisscross parallel coupling inductance positive and negative staggered, thereby the magnetic flux density in horizontal yoke can be cancelled out each other, like this, magnetic flux density in horizontal yoke will reduce, therefore can reduce the core loss of crisscross parallel coupling inductance, reduce the energy loss of crisscross parallel coupling inductance, improve the performance of crisscross parallel coupling inductance.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.

Claims (7)

1. a crisscross parallel coupling inductance, described crisscross parallel coupling inductance comprises at least four magnetic posts; It is characterized in that,

The phase angle of the input voltage of described at least four magnetic posts differs default angle successively, taking make described crisscross parallel coupling inductance horizontal yoke magnetic flux density numerical value switch periods cocycle as on the occasion of with negative value or circulation as negative value and on the occasion of.

2. crisscross parallel coupling inductance according to claim 1, is characterized in that, described crisscross parallel coupling inductance comprises the first magnetic post, the second magnetic post, the 3rd magnetic post and the 4th magnetic post;

The phase angle of the input voltage of described the first magnetic post is θ, described 0≤θ≤360 °;

The phase angle of the phase angle of the phase angle of the input voltage of described the second magnetic post, the input voltage of the 3rd magnetic post and the input voltage of the 4th magnetic post is respectively: 2 α+θ, α+θ and 3 α+θ;

α is unit angle, and the angle α of described unit equals , described N represents the number of magnetic post in described crisscross parallel coupling inductance, described ω is the adjustment angle of presetting.

3. crisscross parallel coupling inductance according to claim 1, is characterized in that, described crisscross parallel coupling inductance comprises the first magnetic post, the second magnetic post, the 3rd magnetic post and the 4th magnetic post;

The phase angle of the input voltage of described the first magnetic post is θ, described 0≤θ≤360 °;

The phase angle of the phase angle of the phase angle of the input voltage of described the second magnetic post, the input voltage of the 3rd magnetic post and the input voltage of the 4th magnetic post is respectively: 2 α+θ, 3 α+θ and α+θ;

α is unit angle, and the angle α of described unit equals described N represents the number of magnetic post in described crisscross parallel coupling inductance, and described ω is the adjustment angle of presetting.

4. crisscross parallel coupling inductance according to claim 1, is characterized in that, described crisscross parallel coupling inductance comprises the first magnetic post, the second magnetic post, the 3rd magnetic post and the 4th magnetic post;

The phase angle of the input voltage of described the first magnetic post is θ, described 0≤θ≤360 °;

The phase angle of the phase angle of the phase angle of the input voltage of described the second magnetic post, the input voltage of the 3rd magnetic post and the input voltage of the 4th magnetic post is respectively: θ-2 α, θ-α and θ+α;

α is unit angle, and the angle α of described unit equals described N represents the number of magnetic post in described crisscross parallel coupling inductance, and described ω is the adjustment angle of presetting.

5. crisscross parallel coupling inductance according to claim 1, is characterized in that, described crisscross parallel coupling inductance comprises the first magnetic post, the second magnetic post, the 3rd magnetic post and the 4th magnetic post;

The phase angle of the input voltage of described the first magnetic post is θ, described 0≤θ≤360 °;

The phase angle of the phase angle of the phase angle of the input voltage of described the second magnetic post, the input voltage of the 3rd magnetic post and the input voltage of the 4th magnetic post is respectively: θ-2 α, θ+α and θ-α;

α is unit angle, and the angle α of described unit equals described N represents the number of magnetic post in described crisscross parallel coupling inductance, and described ω is the adjustment angle of presetting.

6. a converter, is characterized in that, described converter comprises the crisscross parallel coupling inductance described in any one in claim 1 to 5.

7. converter according to claim 6, is characterized in that, described converter also comprises at least one in power conversion circuit and filter circuit.