EP1315178B1 - Three dimensional winding arrangement - Google Patents

Description

The invention relates to a three-dimensional winding arrangement according to the The preamble of claim 1. The invention can be used, for example, to supply energy can be used by sensors and / or actuators from a magnetic field.

DE 39 22 556 C3 describes an arrangement for contactless energy and sensor signal transmission with an RF transmitter to build an unmodulated magnetic High-frequency field known via a transmitter coil, in which a transponder records high-frequency magnetic fields and uses them to supply energy. With The supply energy obtained from the magnetic field becomes sensor and Transponder supplied.

DE 100 55 404 A1 describes an arrangement for generating electrical energy known from a magnetic field at which three Windings with mutually perpendicular winding axes are applied directly to a cube-shaped magnetic core.

US4287 809 is a three-dimensional winding arrangement known according to the preamble of claim 1.

The invention has for its object to be a very effective and simple and compact three-dimensional winding arrangement for generating electrical Specify energy from a magnetic field.

This object is achieved in connection with the features of the preamble solved by the features specified in the characterizing part of claim 1.

The advantages that can be achieved with the invention are, in particular, that one compact, reproducible geometry of the winding arrangement results - d. H. it result very reproducible electrical values (inductance, capacitance) an additional subsequent, cost-intensive coordination (e.g. everyone individual winding in series production). The one for the winding arrangement available space is used optimally, d. H. versus conventionally wound Space is saved in windings. The winding arrangement is inexpensive to manufacture.

The general advantage of a three-dimensional winding is that the three-dimensional winding arrangement no special orientation depending on the magnetic field serving for energy supply always requires an optimal To achieve "energy yield". The three-dimensional winding arrangement is rather always "automatically" optimal in all possible positions with regard to the magnetic field aligned what an optimal reception and an optimal energetic utilization with moving sensors and / or actuators.

The proposed three-dimensional winding arrangement is particularly suitable for an arrangement for wireless supply proposed in DE 199 26 799 A1 a variety of sensors with electrical energy using at least one primary winding fed by a medium-frequency oscillator (primary coil, transmitter coil), wherein each sensor has at least one for energy absorption from a medium frequency Magnetic field (range from about 15 kHz to about 15 MHz) suitable secondary winding (Secondary coil, receiving coil). The secondary windings required there can very well by the proposed three-dimensional winding arrangement will be realized. The advantage of always "automatically" optimal alignment with regard to the magnetic field and thus the optimal energy yield is particularly with sensors mounted on moving machine components (proximity sensors) significant.

The proposed three-dimensional winding arrangement is also very good suitable for a wireless arrangement proposed in DE 199 26 562 A1 Supply of a large number of actuators with electrical energy, which also produces Magnetic field is used for energy transmission.

Further advantages are evident from the description below.

Advantageous embodiments of the invention are characterized in the subclaims.

Fig.1

Wicklungsträger und Kern der Wicklungsanordnung vor dem Zusammenbau,

Fig. 2

den montierten Wicklungsträger vor der Bewicklung,

Fig. 3

eine fertiggestellte dreidimensionale Wicklungsanordnung.

The invention is explained below with reference to the embodiments shown in the drawing. Show it:

Fig.1

Winding carrier and core of the winding arrangement before assembly,

Fig. 2

the assembled winding carrier before the winding,

Fig. 3

a completed three-dimensional winding arrangement.

In Fig. 1, the winding carrier and core of the winding arrangement are before assembly shown. The cube-shaped, central core 1 made of magnetically active material is covered by a winding carrier formed from two hollow half-cubes 2, 8. The two essentially symmetrical half-cubes 2, 8 consist of one electrically insulating plastic material.

All four edges or corners of the outer lateral surface 3 of the half-cube 2 are raised Edges 4, 5, 6, 7 are formed. In the same way, all four edges of the Outer lateral surface 9 of the cube 8 is designed as raised edges 10, 11, 12, 13. The distance between an outer surface of a raised edge 4, 5, 6, 7 and Outer surface 3 or between a raised edge 10, 11, 12, 13 and the outer surface 9 corresponds at least to the winding thickness.

Fig. 2 shows the assembled winding carrier before the winding. Core 1 is complete enclosed by the two half-cubes 2, 8. Preferably between core 1 and inner lateral surfaces of the half-cubes 2, 8, an adhesive is introduced to a Ensure protection against lateral displacement and a robust, vibration-proof and to ensure permanent fixation. Alternatively, the inner surfaces of the Half cubes 2, 8 are provided with flexible knobs, which compensate for tolerances between allow the outer dimensions of the core and the inner dimensions of the half-cubes 2, 8 and at the same time a centering and immovable fixation of the enclosed Ensure core. Another alternative is the introduction of an elastic Foam material or other elastic material between the inner wall the half-cubes 2, 8 and core 1.

The open, mutually facing side edges of the two half-cubes 2, 8 can be designed as tongues or grooves to lock the two half cubes cause.

• Abstandsräume A zwischen den Kanten 10, 11, den Kanten 4, 5, den Kanten 6, 7 und den Kanten 12, 13,
• Abstandsräume B zwischen den Kanten 11, 12, den Kanten 5, 6, den Kanten 4, 7 und den Kanten 10, 13,
• Abstandsräume C zwischen den Kanten 4, 10, den Kanten 5, 11, den Kanten 6, 12 und den Kanten 7,13.

As can be clearly seen in FIG. 2, circumferential spacing spaces A, B, C for winding guidance of the three-dimensional winding arrangement are formed between two raised edges

• Distance spaces A between edges 10, 11, edges 4, 5, edges 6, 7 and edges 12, 13,
• Spaces B between edges 11, 12, edges 5, 6, edges 4, 7 and edges 10, 13,
• Clearance spaces C between edges 4, 10, edges 5, 11, edges 6, 12 and edges 7.13.

Through these spacing spaces A, B, C serving as continuous winding passages the winding width of the windings to be applied is determined in each case.

3 shows a completed three-dimensional winding arrangement. On the winding support 2 + 8 three windings 14, 15, 16 are applied, the lower winding 14 along the space C, the middle winding 15 along the space B and the upper winding 16 runs along the space A. About for example winding connections 17 arranged on the raised edges 5, 6, 7 the three windings 14, 15, 16 are electrically connected. These act as contact pins Trained winding connections 17 are directly with conductor tracks of a circuit board solderable (SMD technology, surface mounted device).

Alternatively, the electrical winding connection is also in place of the contact surfaces shown contact pins can be realized.

In this context, it is a particular advantage if, for example the raised edges 4, 5, 6, 7 on their outward-facing surfaces with locking lugs are provided, which snap into a circuit board and thus the mechanical Allow fixing of the three-dimensional winding arrangement to a circuit board.

The three-dimensional winding arrangement formed is used to generate electrical Energy from a magnetic field. The winding axes of the three windings 14, 15, 16 are arranged at right angles to each other and intersect in a common one Point. To generate electrical energy from a magnetic field, the Windings 14, 15, 16 together with resonance capacitors each have series resonance circuits or parallel resonance circuits, which are preferably connected to rectifiers are connected. The rectifiers are each on the secondary side with backup capacitors Mistake. The DC connections of all rectifiers are to be fed in series with one Load - for example a sensor measuring unit or sensor electronics or a control unit of an actuator - connected.

Claims (7)

1. A three-dimensional winding arrangement for producing electrical energy from a magnetic field, comprising three windings (14,15,16) whose winding axes are each disposed in a rectangular way with respect to each other and intersect in a common point, with a cubical, winding carrier being provided which encloses a core (1) made of a magnetically active material and which is provided on its eigh corners with elevated edges (4, 5, 6, 7, 10, 11, 12, 13), with the distance between an outside surface of an elevated edge (4, 5, 6, 7, 10, 11, 12, 13) and the outside jacket surface (3, 9) of the cube corresponding at least to the winding strength and with circular spacer chambers (A, B, C) each being provided between two elevated edges for guiding the windings or laying the windings (14, 15, 16), characterized in that the winding carrier is composed of two hollow semi-cubes (2, 8) which consist of an electrically insulating plastic material.
2. A winding arrangement as claimed in claim 1, characterized in that an adhesive material is introduced between the inside jacket surfaces of the semi-cubes (2, 8 and the core (1).
3. A winding arrangement as claimed in claim 1, characterized in that the inside surfaces of the semi-cubes (2, 8) are provided with flexible knobs.
4. A winding arrangement as claimed in claim 1, characterized in that an elastic material, preferably foamed material, is introduced between the inner wall of the semi-cubes (2, 8) and the cube (1).
5. A winding arrangement as claimed in one of the preceding claims, characterized in that the mutually facing side edges of the semi-cubes (2, 8) are configured as latchable springs or grooves.
6. A winding arrangement as claimed in one of the preceding claims, characterized in that winding connections (17) which are arranged as contact pins or contact surfaces are arranged on the elevated edges.
7. A winding arrangement as claimed in one of the preceding claims, characterized in that at least individual elevated edges are provided on outwardly facing surfaces with latching noses which are suitable for mounting on a printed circuit board.

Images