CN117711741A - Ring integrated adjustable inductance of multiphase resonant circuit - Google Patents
Ring integrated adjustable inductance of multiphase resonant circuit Download PDFInfo
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- CN117711741A CN117711741A CN202311848528.XA CN202311848528A CN117711741A CN 117711741 A CN117711741 A CN 117711741A CN 202311848528 A CN202311848528 A CN 202311848528A CN 117711741 A CN117711741 A CN 117711741A
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Abstract
The invention provides a ring-shaped integrated adjustable inductor of a multiphase resonant circuit, which is suitable for LCC circuit front-stage resonant inductance of a multiphase wireless power supply system. The adjustable inductor adopts four square magnetic cores with standard sizes, the four square magnetic cores are spliced into a magnetic ring structure, and the joint positions of the four spliced magnetic cores are provided with adjustable air gaps; winding twines on the magnetic ring structure that the magnetic core spliced becomes, fixes magnetic core and winding on anchor clamps to exert pressure to the magnetic core through the knob of settling on anchor clamps, thereby adjust the air gap of magnetic core joint position, and then can adjust the inductance value of heterogeneous in succession, steadily, in step. The invention integrates a plurality of resonant inductors, thereby reducing the volume, the space and the use of a magnetic core.
Description
Technical Field
The invention belongs to the technical field of wireless power transmission, and particularly relates to a ring-shaped integrated adjustable inductor of a multiphase resonant circuit.
Background
In a high-power resonant circuit, the inductance and the capacitance involved in the circuit resonance need to pass a large current, but the resonant inductance formed by adopting the traditional magnetic ring is easy to saturate and has larger loss, so that the resonant inductance with lower loss at high frequency and large current is needed. Meanwhile, the resonant inductor of the multiphase LCC resonant system needs to be respectively provided with the inductors of all phases, so that the occupied volume and the space are large, the magnetic leakage is large, and the comprehensive cost is high.
Meanwhile, in engineering process, due to the problems of drift of mechanical structures and circuit parameters of circuit devices, the deviation of system resonant frequency can be caused, and the power and efficiency of energy transmission can be influenced, so that a resonant device structure with large adjustable margin is needed to realize high-efficiency operation of the system.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a ring-shaped integrated adjustable inductor of a multiphase resonant circuit.
The invention is realized by the following technical scheme that the invention provides an annular integrated adjustable inductor of a multiphase resonant circuit, which is suitable for LCC circuit front-stage resonant inductance of a multiphase wireless power supply system, wherein, if the inductance is an N-phase system, the amplitude is U, un=Usin (ωt+2pi N/N), N is a positive integer of 1-N, and if the inductance is a single-phase system, namely U 1 ＝U 2 … =un; the adjustable inductor adopts four square magnetic cores with standard sizes, the four square magnetic cores are spliced into a magnetic ring structure, and the joint positions of the four spliced magnetic cores are provided with adjustable air gaps; winding twines on the magnetic ring structure that the magnetic core spliced becomes, fixes magnetic core and winding on anchor clamps to exert pressure to the magnetic core through the knob of settling on anchor clamps, thereby adjust the air gap of magnetic core joint position, and then can be continuous stable adjustment inductance.
Further, the arrangement mode of the windings comprises: the first mode is to adopt a sequential winding method that multiple phases are sequentially and respectively wound on each plane, namely the distribution of windings on each plane is completely the same; the second way is a staggered winding method in which the leftmost winding of each plane is shifted to the rightmost winding every time a next set of windings is wound 90 ° counterclockwise.
Further, when the winding is wound in a plurality of turns, the winding can be performed in any one of the following 6 ways;
the first mode is that 1-phase to n-phase windings on each plane are intensively wound, and a sequential winding method is adopted among the phase windings; each phase can be equivalently a wire harness, and then the wire harness is the same as a single-turn sequential winding method;
the second mode is that 1-phase to n-phase windings on each plane are intensively wound, and a staggered winding method is adopted among the phase windings; each phase can be equivalent to a wire harness and then is the same as a single-turn staggered winding method;
the third mode is that 1-phase to n-phase windings on each plane are sequentially wound in turn, and a sequential winding method is adopted among the phase windings;
the fourth mode is that 1-phase to n-phase windings on each plane are sequentially wound in a staggered way, and a sequential winding method is adopted among the phase windings;
the fifth mode is that 1-phase to n-phase windings on each plane are sequentially wound in a staggered way, and a staggered winding method is adopted among the phase windings;
in a sixth mode, 1-phase to n-phase windings on each plane are sequentially wound in turn, and a staggered winding method is adopted among the phase windings.
Further, the winding arrangement mode adopts a winding mode that a 1-phase winding and a 2-phase winding are respectively and intensively wound on one magnetic core, the winding mode comprises two modes that the same-direction winding is arranged on the adjacent side and the same-phase winding is arranged on the opposite side, and insulation is enhanced between the winding and the magnetic core.
The invention has the beneficial effects that:
1. the resonant inductance of the high-frequency resonant circuit has large passing current, and the transformer manufactured by adopting the traditional magnetic ring is easy to saturate.
2. The resonance inductor of the multiphase LCC resonance system occupies large volume and space, and the invention integrates a plurality of resonance inductors together, thereby reducing the volume, the space and the use of a magnetic core.
3. The E-type inductor with the same structure is adopted, and the adjustable margin is small due to the limited number of air gaps.
4. The invention adopts standard block-shaped magnetic cores with common size, is easy to produce and process, and the magnetic cores can be flexibly replaced in the use process.
5. The invention adopts an annular structure, and has lower magnetic leakage compared with an open structure.
Drawings
Fig. 1 is a topology of a multiphase LCC system.
Fig. 2 is a schematic diagram of the main components of the toroidal inductor.
Fig. 3 is a schematic diagram of an inductance adjustment mode of the toroidal inductor.
Fig. 4 is a schematic diagram of a multiphase toroidal inductor.
Fig. 5 is a diagram of an embodiment of a sequentially wound inductor winding.
Fig. 6 is a diagram of an embodiment of an induction winding that is stagger wound.
Fig. 7 is a diagram of an inductor winding embodiment 2 wound in sequence.
Fig. 8 is a diagram of alternate winding inductor winding embodiment 2.
Fig. 9 is a diagram of a winding embodiment in which the in-phase winding is on the adjacent side.
Fig. 10 is a diagram of a winding embodiment with the in-phase winding on the opposite side.
Fig. 11 is an external view of an inductance device.
Fig. 12 is an exploded view of an inductive device.
Fig. 13 is a top view of an inductive device.
Fig. 14 is a front view of an inductive device.
Fig. 15 is a cross-sectional view of an inductive device.
The reference numerals in the figures illustrate: a 1 magnetic loop structure, a 2 winding, a 4 adjustable knob/inductance adjustment knob, 301 top clamp plate, 302 bottom clamp plate, 303 inside clamp 1, 304 inside clamp 2, 305 outside clamp.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Term interpretation:
resonant inductance: the inductor is used for a resonant circuit and is in a resonant state in operation.
Referring to fig. 1-15, the present invention provides a loop integrated adjustable inductor of a multiphase resonant circuit, which is suitable for an LCC circuit pre-stage resonant inductor of a multiphase wireless power supply system, wherein, in case of an N-phase system, the amplitude is U, un=usin (ωt+2n/N), N is a positive integer from 1 to N, and in case of a single-phase system, i.e. U 1 ＝U 2 … =un; the adjustable inductor adopts four square magnetic cores with standard sizes, the four square magnetic cores are spliced into a magnetic ring structure, and the joint positions of the four spliced magnetic cores are provided with adjustable air gaps; winding twines on the magnetic ring structure that the magnetic core spliced becomes, fixes magnetic core and winding on anchor clamps to exert pressure to the magnetic core through the knob of settling on anchor clamps, thereby adjust the air gap of magnetic core joint position, and then can adjust the inductance value of heterogeneous in succession, steadily, in step. As shown in fig. 2 and 3, to achieve this function, a magnetic core needs to be inserted into the winding to achieve adjustment, and the air gap is adjusted by the tightness degree of the extrusion between the magnetic cores, so as to achieve adjustment of the inductance. Fig. 4 is a schematic diagram of an implementation of an adjustable inductance device.
The arrangement mode of the windings comprises the following steps: the first mode is to adopt a sequential winding method that multiple phases are sequentially and respectively wound on each plane, namely the distribution of windings on each plane is completely the same; the second way is a staggered winding method in which the leftmost winding of each plane is shifted to the rightmost winding every time a next set of windings is wound 90 ° counterclockwise.
Taking a 3-phase system as an example, the sequential winding method is shown in fig. 5, the self inductance and mutual inductance are shown in the following table,
sequentially wound inductance matrix meter
| L1 | L2 | L3 | |
| L1 | 360 | 354 | 348 |
| L2 | 353 | 370 | 357 |
| L3 | 348 | 356 | 366 |
It can be seen that the difference in self inductance of the three phases is below 3% at maximum.
The alternate winding method is shown in fig. 6, the self inductance and mutual inductance of which are shown in the following table,
inductance matrix meter wound in staggered mode
| L1 | L2 | L3 | |
| L1 | 346 | 332 | 330 |
| L2 | 332 | 347 | 333 |
| L3 | 330 | 333 | 347 |
Thus, the difference of self-inductance of the three phases is maximally lower than 0.3%, and the self-inductance is reduced by 4%. Therefore, the staggered winding method can balance the three-phase self-inductance and has better consistency.
Taking a 4-phase system as an example, the sequential winding method is shown in fig. 7, and the staggered winding method is shown in fig. 8.
When the winding is wound in a plurality of turns, any one of the following 6 modes can be adopted for winding;
the first mode is that 1-phase to n-phase windings on each plane are intensively wound, and a sequential winding method is adopted among the phase windings; each phase can be equivalently a wire harness, and then the wire harness is the same as a single-turn sequential winding method;
the second mode is that 1-phase to n-phase windings on each plane are intensively wound, and a staggered winding method is adopted among the phase windings; each phase can be equivalent to a wire harness and then is the same as a single-turn staggered winding method;
the third mode is that 1-phase to n-phase windings on each plane are sequentially wound in turn, and a sequential winding method is adopted among the phase windings;
the fourth mode is that 1-phase to n-phase windings on each plane are sequentially wound in a staggered way, and a sequential winding method is adopted among the phase windings;
the fifth mode is that 1-phase to n-phase windings on each plane are sequentially wound in a staggered way, and a staggered winding method is adopted among the phase windings;
in a sixth mode, 1-phase to n-phase windings on each plane are sequentially wound in turn, and a staggered winding method is adopted among the phase windings.
When the requirement on the inter-turn insulation of the windings is relatively high and the number of phases is small, the winding mode of winding the 1-phase winding and the 2-phase winding on one magnetic core in a concentrated mode is adopted, two phases are taken as an example, the winding mode comprises two modes of winding in the same direction on the adjacent side and winding in the same phase on the opposite side, and insulation is enhanced between the windings and the magnetic core, as shown in fig. 9 and 10.
In order to realize the fixation of the structure, the magnetic core and the coil are fixed on the clamp, and the air gap of the joint position of the magnetic core can be adjusted by the pressure applied to the magnetic core by the knob arranged on the clamp, so that the inductance can be continuously and stably adjusted.
As shown in fig. 11-15, the present invention provides an inductor device implementation structure, the appearance of which is shown in fig. 11. The main structure is shown in an exploded view as shown in fig. 12, four square magnetic cores with standard sizes are adopted to be spliced into a magnetic ring structure 1, and the joint positions of the four spliced magnetic cores are provided with adjustable air gaps; the core is fixed by means of a clamp, on which the winding 2 is wound. The air gap of the joint position of the magnetic core can be adjusted by the pressure applied to the magnetic core by the knob 4 arranged on the magnetic core clamp, so that the inductance can be continuously and stably adjusted.
Wherein, the magnetic material of the magnetic ring structure adopts magnetic conductive materials such as manganese zinc ferrite, nickel zinc ferrite, silicon steel, iron-based nanocrystalline, amorphous and the like. Typically 50 x 50mm,100 x 100mm square, may be configured as four equal rectangular cores.
The winding is formed by winding wires such as single-core copper wires, multi-core copper wires, litz wires, flat ribbon wires and the like along the clamp shell. The number of turns of the single-side winding is smaller than 10 turns at 10kHz-85kHz, the total number of turns is smaller than 40 turns, the preferable range is 3-5 turns on the single side, and the total number of turns is 12-20 turns.
The magnetic core and the winding clamp adopt insulating frames such as bakelite, acrylic, ceramic and the like. The specific dimensions depend on the magnetic material structure and dimensions.
The adjustable knob/inductance adjusting knob is made of nonmetallic materials such as nylon bolts. The air gap between the magnetic cores can be adjusted by a screwdriver and a rotary knob.
It can be seen from the sectional view of fig. 15 that a certain air gap exists between the four magnetic cores, and the degree of tightness of extrusion between the magnetic cores is adjusted by adjusting the knob so as to adjust the air gap, thereby realizing adjustment of the inductance.
The above examples are given for clarity of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (4)
1. The annular integrated adjustable inductor of the multiphase resonant circuit is characterized in that the adjustable inductor is suitable for the LCC circuit front-stage resonant inductor of a multiphase wireless power supply system, wherein the amplitude is U in the case of an N-phase system, un=Usin (ωt+2pi N/N), N is a positive integer of 1-N, and the amplitude is U in the case of a single-phase system 1 ＝U 2 … =un; the adjustable inductor adopts four square magnetic cores with standard sizes, the four square magnetic cores are spliced into a magnetic ring structure, and the joint positions of the four spliced magnetic cores are provided with adjustable air gaps; winding is wound on a magnetic ring structure formed by splicing magnetic cores, the magnetic cores and the winding are fixed on a clamp, and pressure is applied to the magnetic cores through a knob arranged on the clamp, so that an air gap at the joint position of the magnetic cores is subjected toThe inductance can be continuously and stably adjusted by adjusting.
2. The tunable inductor of claim 1, wherein: the arrangement mode of the windings comprises the following steps: the first mode is to adopt a sequential winding method that multiple phases are sequentially and respectively wound on each plane, namely the distribution of windings on each plane is completely the same; the second way is a staggered winding method in which the leftmost winding of each plane is shifted to the rightmost winding every time a next set of windings is wound 90 ° counterclockwise.
3. The tunable inductor of claim 2, wherein: when the winding is wound in a plurality of turns, any one of the following 6 modes can be adopted for winding;
the first mode is that 1-phase to n-phase windings on each plane are intensively wound, and a sequential winding method is adopted among the phase windings; each phase can be equivalently a wire harness, and then the wire harness is the same as a single-turn sequential winding method;
the second mode is that 1-phase to n-phase windings on each plane are intensively wound, and a staggered winding method is adopted among the phase windings; each phase can be equivalent to a wire harness and then is the same as a single-turn staggered winding method;
the third mode is that 1-phase to n-phase windings on each plane are sequentially wound in turn, and a sequential winding method is adopted among the phase windings;
the fourth mode is that 1-phase to n-phase windings on each plane are sequentially wound in a staggered way, and a sequential winding method is adopted among the phase windings;
the fifth mode is that 1-phase to n-phase windings on each plane are sequentially wound in a staggered way, and a staggered winding method is adopted among the phase windings;
in a sixth mode, 1-phase to n-phase windings on each plane are sequentially wound in turn, and a staggered winding method is adopted among the phase windings.
4. The tunable inductor of claim 1, wherein: the winding arrangement mode adopts a winding mode that a 1-phase winding and a 2-phase winding are respectively and intensively wound on one magnetic core, wherein the winding mode comprises two modes of a same-direction winding on the adjacent side and a same-phase winding on the opposite side, and insulation is enhanced between the windings and the magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311848528.XA CN117711741A (en) | 2023-12-29 | 2023-12-29 | Ring integrated adjustable inductance of multiphase resonant circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311848528.XA CN117711741A (en) | 2023-12-29 | 2023-12-29 | Ring integrated adjustable inductance of multiphase resonant circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117711741A true CN117711741A (en) | 2024-03-15 |
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ID=90158880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311848528.XA Pending CN117711741A (en) | 2023-12-29 | 2023-12-29 | Ring integrated adjustable inductance of multiphase resonant circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117711741A (en) |
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2023
- 2023-12-29 CN CN202311848528.XA patent/CN117711741A/en active Pending
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