Search

CN-122000186-A - Novel coil module

CN122000186ACN 122000186 ACN122000186 ACN 122000186ACN-122000186-A

Abstract

The utility model provides a novel coil module, contains at least first sub-coil, second sub-coil and first soft magnetic material, first sub-coil with the second sub-coil all adopts the sub-coil that has the centre bore of similar plane winding, first sub-coil with the second sub-coil is the stromatolite structure, the tail end of first sub-coil with the head end electricity of second sub-coil is connected, will the head end of first sub-coil with after the tail end of second sub-coil inserts arbitrary power and circular telegram, the first magnetic field polarity direction that first sub-coil produced with the second magnetic field polarity direction that second sub-coil produced is the same. The first soft magnetic material is close to one side of the first sub-coil far away from the second sub-coil, or the first soft magnetic material is close to one side of the second sub-coil far away from the first sub-coil.

Inventors

  • XING YITAO

Assignees

  • 深圳市启天太一科技有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (6)

  1. 1. A novel coil module for electromagnetic coupling energy transmission is characterized by comprising at least a first sub-coil and a second sub-coil, The first sub-coil and the second sub-coil are sub-coils with central holes and similar to planar windings; the first sub-coil and the second sub-coil are of laminated structure, The tail end of the first sub-coil is electrically connected with the head end of the second sub-coil, after the head end of the first sub-coil and the tail end of the second sub-coil are connected with any power supply and electrified, the polarity direction of a first magnetic field generated by the first sub-coil is the same as the polarity direction of a second magnetic field generated by the second sub-coil, The second projection characteristic of the windings of the second sub-coil on the plane of the first sub-coil is that the furthest distance d2 from the part of the projection of the outermost winding in the second projection, which is located in the range of the central hole of the first sub-coil, to the edge of the central hole of the first sub-coil is less than or equal to the projection width W1 of the innermost winding of the first sub-coil on the plane of the first sub-coil.
  2. 2. The novel coil module of claim 1, wherein said first sub-coil and said second sub-coil are rectangular-like coils, and wherein said first sub-coil and said second sub-coil are approximately the same width but substantially different in length; the stacked structural feature is that the first sub-coil is substantially aligned with the second sub-coil center, the respective long sides are substantially parallel, and the respective short sides are substantially parallel.
  3. 3. A novel coil module as set forth in claim 1, further comprising a first soft magnetic material, The first soft magnetic material is close to one side of the first sub-coil far away from the second sub-coil, or the first soft magnetic material is close to one side of the second sub-coil far away from the first sub-coil, And the part of the soft magnetic material, which is positioned outside the first sub-coil in the projection of the plane of the first sub-coil, is more than or equal to 1/20 of the intersection of the projection of the soft magnetic material on the plane of the first sub-coil and the projection of the soft magnetic material on the plane of the second sub-coil.
  4. 4. The novel coil module as set forth in claim 1, further comprising a third sub-coil, a fourth sub-coil to an Nth sub-coil, The third sub-coil, the fourth sub-coil and the Nth sub-coil are all sub-coils with central holes, which are similar to plane windings; The first sub-coil and the second sub-coil to the Nth sub-coil are sequentially laminated, The tail end of the A-th sub-coil is electrically connected with the head end of the A+1-th sub-coil, and after the head end of the first sub-coil and the tail end of the N-th sub-coil are connected with any power supply and electrified, the polarity directions of magnetic fields generated from the first sub-coil to the N-th sub-coil are the same, wherein A is any natural number from 1 to N-1; the projection characteristic of the A+1 projection of the winding of the A+1 sub-coil on the plane of the A sub-coil is that the furthest distance D (A+1) from the part of the projection of the outermost winding in the A+1 projection, which is positioned in the range of the central hole of the A sub-coil, to the edge of the central hole of the A sub-coil is less than or equal to the projection width WA of the innermost winding of the A sub-coil on the plane of the first sub-coil.
  5. 5. The novel coil module as set forth in claim 4, wherein each of said sub-coils is a quasi-rectangular coil, and said each sub-coil has a width that is nearly but substantially different in length, and said a-th sub-coil has a length that is longer than said a+1-th sub-coil; The laminated structure is characterized in that the centers of the sub-coils are substantially aligned, the respective long sides are substantially parallel, and the respective short sides are substantially parallel.
  6. 6. A novel coil module as set forth in claim 4, further comprising a first soft magnetic material, The first soft magnetic material is close to one side of the first sub-coil far away from the second sub-coil, or the first soft magnetic material is close to one side of the N-th sub-coil far away from the N-1 th sub-coil, The part of the soft magnetic material, which is positioned outside the Nth sub-coil in the projection of the soft magnetic material on the plane of the first sub-coil, is more than or equal to 1/20 of the intersection of the projections of the soft magnetic material on the plane of each sub-coil.

Description

Novel coil module Technical Field The invention relates to a structural design and a production method of a quasi-planar coil module for electromagnetic coupling energy transmission, which aims to hardly change the outer dimension of the coil module and simultaneously obtain the maximum radial offset of the same coil module under the condition of almost unchanged magnetic coupling coefficient at the lowest cost. Background Electromagnetic coupling technology is used in large numbers for wireless charging applications for energy transfer when two independent devices are in close proximity, such as cell phones, watches, and various robots. In order to achieve "thinning" of the electromagnetic coupling energy transmission device, the energy output device and the energy input device in most cases use a coil, which is provided with a planar winding of soft magnetic material on one side, as an interface for electromagnetic coupling energy transmission. When the transmitting coil module of the energy output device and the receiving coil module of the energy input device are close to each other, a good magnetic coupling effect can be obtained to efficiently transmit rated power. When there is a significant radial offset between the transmit coil module and the receive coil module in a direction perpendicular to the winding axis of either coil, the law of variation of the magnetic coupling coefficient is such that the magnetic coupling coefficient is hardly changed when the radial offset is smaller than a coefficient M related to the radial dimension of the coil, and is accelerated to decrease until it becomes zero when the radial offset is larger than the coefficient M. Once the magnetic coupling coefficient is obviously reduced, the transmitting coil module and the receiving coil module are difficult to efficiently transmit electromagnetic coupling energy, and even the situation that the electromagnetic coupling energy cannot be transmitted can occur. In the field of robots and autopilots, when a robot or a vehicle autonomously stops beside an energy output device for electromagnetic coupling energy charging, the robot or the vehicle tends to have a certain offset in the horizontal direction relative to the energy transmission device, and the range of offset values tends not to exceed the value X. In this case, a disc-shaped coil having an outer diameter of more than 3.5X, an inner diameter of more than 1.5X, and a winding width of not less than X is used as a core module, so that a good magnetic coupling coefficient and a rated power and high-efficiency energy transmission can be obtained. Wherein the outer diameter determines the space required for installation, the inner diameter determines the upper power limit of the electromagnetic coupling energy transmission, and the winding width determines the maximum value of the allowable offset. Assuming that the maximum offset X is 10cm when the robot or vehicle is stopped, the dimensions of the disc-shaped coil are at least 35cm outside diameter, 15cm inside diameter and 10cm winding width. However, in practical situations, the robot or the vehicle is hardly provided with a region which can fix the disc-shaped coil and does not interfere with the coil or is not interfered by the coil, but only a region such as an anti-collision fence can fix a rectangular-like coil, for example, a rectangular coil which has a width of less than 15cm but a length of more than 100cm can be fixed near the anti-collision fence of the vehicle. In reality, almost all plane-like coils are coiled from the head end to the tail end using a continuous bundle of wires, so that the width of any area of the coil windings is almost the same. For example, a rectangular coil with a width of 15cm and a length of 50cm, if a wire with a cross section of 1cm is used for winding, the rectangular coil with a center hole with a width of 1cm and a length of 36cm is fished out in extreme cases, and the winding width on either side is about 7cm. Therefore, the maximum allowable offset of the rectangular coil in the length direction is about 7cm, which is not enough, and the rectangular coil has a very narrow strip shape of the central hole, so that the rectangular coil can only generate a very weak electromagnetic coupling energy transmission effect. If the coil winding wires are stacked 3 layers on the long side and are tiled on the short side, 12 layers are wound, the long-side winding width is about 4cm, the short-side winding width is about 12cm, the central hole size is about 26x7cm, and the maximum allowable offset exceeding 10cm and the obviously enhanced electromagnetic coupling energy transmission effect can be met. However, this method of winding the coils is hardly suitable for mass production with high uniformity. Therefore, it is necessary to invent a structural design and a production manner of the novel coil module, and to realize mass production with minimum cost and high consistency while mee