Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
  • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
  • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type

Definitions

• the invention relates to a system for the contactless transmission of electrical power to a mobile part.
• a pulsed power supply system with a high pulse rate is known from DE 698 27 524 T2.
• the invention is therefore based on the object of designing a system for the contactless transmission of electrical power to a mobile part in a simple and efficient manner.
• the object is achieved in the system for contactless transmission of electrical power to a mobile part according to the features specified in claim 1.
• the system has a primary conductor, a
• Compensation arrangement for providing a capacity and the mobile part, wherein the mobile part has, in particular on its underside, a secondary winding which is inductively coupled to the, in particular, elongated, stationary primary conductor, the capacitance being connected in series to the primary conductor, the compensation arrangement bolts, in particular connecting bolts and
• a first bolt can optionally be connected to a second or third bolt.
• the capacitance arranged between the first and the second bolt can be short-circuited and is therefore ineffective.
• a bridge between the first and the second bolt also enables a parallel connection of a capacitance arranged between a fourth and the first pin and a capacitance arranged between the second pin and the fourth pin.
• either a first or a second capacitance value can be brought about in a simple manner. Further capacitance values can be achieved by using further bridges between other bolts. A fine adjustment of the capacitance value to the respective inductance of the primary conductor can thus be carried out. If the frequency of the alternating current impressed in the primary conductor is fixed, the capacitance value can be adapted as closely as possible to the resonance case. The capacitance of the compensation arrangement then compensates for the inductance of the primary conductor.
• the bolts are fitted on a first printed circuit board or on a second printed circuit board, the second printed circuit board being in particular equipped with capacitors on both sides wherein the studs fitted on the second circuit board protrude through the first circuit board, in particular through a recess in the first circuit board.
• the first printed circuit board has no conductor tracks, but only has a protective function and a holding function for bolts.
• the studs fitted on the second circuit board are connected via their conductor paths to capacitors that are fitted on the second circuit board.
• the capacitance is dimensioned such that the
• the resonance frequency of the resonant circuit formed from the capacitance and the primary conductor is the same as the frequency of the current impressed by an alternating current source of the system in the primary conductor and / or resonant circuit.
• the advantage here is that reactive power is compensated in the case of resonance and losses can be reduced. This also increases the efficiency of the inductive transmission of electrical energy to a mobile part.
• the second printed circuit board is in a housing
• the advantage here is that the second printed circuit board is arranged in a protected manner within the interior area surrounded by the first printed circuit board together with the housing.
• the first circuit board is arranged parallel to the second circuit board.
• the advantage here is that the bolts fitted on the second circuit board can be stored in a stable and uniform manner by means of the recesses in the first circuit board.
• the first circuit board is spaced from the second circuit board.
• the respective bridge is designed as a sheet metal part that has two spaced through holes through which a respective bolt protrudes.
• all bolts are aligned parallel to one another.
• that bridge protrudes through the first hole of which a bolt fitted on the first printed circuit board is designed, in particular, as a Z-shaped angle part, in particular wherein the angle part has a first tab area which is aligned parallel to the first printed circuit board and the first hole and the angle part has a second tab area which is aligned parallel to the second printed circuit board and has a further hole, the angle part having a connection area which is connected to the first and second tab area, in particular and is designed in one piece, that is, in one piece wherein the distance between the first and second tab areas equals the distance between the first and second circuit boards.
• the advantage here is that the first bolt can be arranged higher and thus functions as a connection bolt for an outgoing line.
• a last bolt can also be arranged higher and can thus be used as a connection bolt for a return line.
• the connection bolt for the outgoing line forms the first connection for the series resonant circuit formed from the capacitance and the primary conductor.
• connection bolt for the return line forms the second connection for the series resonant circuit formed from the capacitance and the primary conductor.
• a cable lug in particular with its eyelet, for the electrical connection to a forward conductor or a return conductor is attached to each bolt fitted on the first printed circuit board.
• the advantage here is that there is enough free space to attach the cable lug.
• an isolation distance to the other bolts is increased.
• three bolts that are closest to one another each have the same spacing from one another, that is to say in particular are arranged at the corners of an equilateral triangle.
• a first bolt can be connected to other bolts by means of a single bridge.
• the bolts form the connection nodes of an electrical series connection of capacitances, in particular with one of the capacitances of the series connection being connected in parallel with a further capacitance.
• the advantage here is that a corresponding
• FIG. 1 the circuit-related structure of a compensation arrangement of a system according to the invention for inductive transmission of electrical power, in particular to a mobile part, is shown schematically, with no bridges 20 being present.
• FIG. 2 shows a bridge 20 and two bridges designed as angle parts 31.
• FIG. 3 shows a plan view of the opened compensation arrangement.
• FIG. 4 shows a cross section of the compensation arrangement belonging to FIG.
• FIG. 5 in contrast to FIG. 2, a different effective capacitance is made available between the connecting bolts 1 and 2 through a changed arrangement of the bridge 20.
• FIG. 6 in contrast to FIG. 2, a different effective capacitance is made available between the connecting bolts 1 and 2 by using several bridges 20, in particular the effective capacitance of the parallel connection of all between the bolts (3, 4, 5, 6, 7 , 8) corresponds to the arranged capacities.
• the compensation arrangement has capacitances which can be connected in various ways by means of bridges 20, so that the compensation arrangement between a first connection bolt 1 and a second connection bolt 2 has a different capacitance in each case.
• the system has an elongated primary conductor in a system.
• a mobile part has a secondary winding on its underside that can be inductively coupled to the primary conductor.
• electrical power can be transmitted to the mobile part, with a capacitance being connected in parallel or in series to the secondary winding.
• the capacity is dimensioned in such a way that the
• the resonance frequency of the resonant circuit thus formed corresponds to the frequency of the alternating current impressed in the primary conductor.
• a further capacitance is also connected in series with the primary conductor, the further capacitance being dimensioned in such a way that the resonance frequency of the further resonant circuit formed in this way corresponds to the frequency of the primary conductor, i.e. the series circuit
• the compensation arrangement shown in the figures acts as this additional capacitance. Setting the one that comes as close as possible to the optimal capacitance value
• the capacitance value is achieved by bridges 20, which suitably connect connecting bolts (3, 4, 5, 6, 7, 8).
• a connecting bolt 1 is for connecting a
• Cable lug which is connected to an electrical line functioning as a supply line, in particular a stranded wire, is arranged on a first printed circuit board 32 and a second connection bolt 2
• connecting bolts (3, 4, 5, 6, 7, 8) are arranged on a second printed circuit board 34.
• Capacitors are arranged on the second circuit board and by means of
• Connecting bolts (3, 4, 5, 6, 7, 8) are electrically contacted, in particular connected.
• a first capacitance which is formed from capacitors connected in series and / or in parallel, is preferably arranged between a first connecting bolt 3 and a second connecting bolt 4.
• a second capacitance is arranged between a third connecting bolt 5 and the second connecting bolt 4, which capacitance is formed from capacitors connected in series and / or in parallel.
• a third capacitance which is formed from capacitors connected in series and / or in parallel, is arranged between a fourth connecting bolt 6 and the third connecting bolt 5.
• a fourth capacitance is arranged between a fifth connecting bolt 7 and the fourth connecting bolt 6 and is formed from capacitors connected in series and / or in parallel.
• a fifth capacitance is arranged between a sixth connecting bolt 8 and the fourth connecting bolt 6 and is formed from capacitors connected in series and / or in parallel.
• the bolts (1, 2, 3, 4, 5, 6, 7, 8) are arranged in two rows, with the bolts (3, 5, 7, 8) of the first row against the bolts (1, 2, 4, 6) of the second row are offset.
• Each of the rows is arranged along a straight line, the bolts of the respective row being regularly spaced from one another along the straight line.
• the three next adjacent bolts (1, 2, 3, 4, 5, 6, 7, 8) are arranged in such a way that the bolts (1, 2, 3, 4, 5, 6, 7, 8) in plan view are arranged at the corners of an isosceles triangle.
• a respective bolt (1, 2, 3, 4, 5, 6, 7, 8) with a respective bridge 20 is optionally at least one of two of the bolts (1, 2, 3, 4, 5, 6, 7 , 8) connectable.
• the bridge 20 is made as a stamped part from sheet metal, in particular copper sheet or brass sheet, the bridge 20 having two through holes, the distance between which corresponds to the side length of the isosceles, in particular equilateral, triangle.
• a plurality of bridges 20 can also be used, so that effectively different capacitance values can be provided.
• first connection bolt 1 Since the first connection bolt 1 is arranged on the first printed circuit board 32, which is aligned parallel to the second printed circuit board 34 and at a distance from it. Thus, the first connection bolt 1 is higher, in particular arranged further away from the second printed circuit board 34 than the connection bolts (3, 4, 5, 6, 7, 8). Thus, an angle part 31, in particular a punched and bent part, is used as a bridge between the first connection bolt 1 and the first connection bolt 3 or, optionally, the second connection bolt 4.
• This angle part 31 is pushed onto the two bolts (1, 3) or (1, 4) to be connected and pressed directly or indirectly via an intermediate cable lug onto a plastic body provided on the bolt, which is connected to the bolt by a nut screwed onto a threaded area of the bolt the connecting bolt 3 receives and holds electrically connected connection feet.
• the angle part 31 brings the feed line closer to the first printed circuit board 32 via a step and connects the first connecting bolt 1 to the connecting bolt 3 or 4.
• a respective bridge 20 can be used to connect two bolts, so that the desired capacitance value is provided between the first connection bolt 1 and the second connection bolt 2.
• Each connecting bolt is through a recess in the first circuit board 32
• connection feet are connected to conductor tracks which are connected to capacitors.
• the second printed circuit board 34 is equipped on both sides with capacitors, in particular using SMD technology. Large capacitance values can be achieved by connecting many capacitors in parallel.
• the first circuit board 32 and the second circuit board 34 are each in the housing 33 of the first circuit board 32 and the second circuit board 34.
• Spacer means arranged.
• the bolts are preferably made of copper or brass.
• a plastic block injected onto the respective bolt receives the respective connection feet, by means of which the respective bolt is fitted to the respective circuit board and by means of which the bolt can be electrically connected.
• FIG. 1 the capacitances connecting bolts are shown symbolically.
• Connection bolts 1 and 2 are electrically separate.
• Parallel connection is shown, which is formed from the capacitance arranged between the bolts 6 and 7 and the capacitance arranged between the bolts 6 and 8.

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Power Engineering (AREA)
• Filters And Equalizers (AREA)
• Combinations Of Printed Boards (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=69423274

Family Applications (1)

Country Status (4)

Citations (4)

• 2020
  • 2020-01-30 WO PCT/EP2020/025041 patent/WO2020164800A1/de unknown
  • 2020-01-30 DE DE102020000608.6A patent/DE102020000608A1/de active Pending
  • 2020-01-30 CN CN202080014171.3A patent/CN113424394A/zh active Pending
  • 2020-01-30 EP EP20703141.0A patent/EP3925056A1/de active Pending

Patent Citations (4)

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