DE10103280B4 - Arrangement for contactless transmission of electrical energy between mutually linearly movable vehicle parts - Google Patents

Abstract

arrangement for contactless transmission of electrical energy between a stationary vehicle part and one in contrast linearly movable vehicle part with at least one transformer (1, 2), whose windings (3 to 6) - primary winding and secondary winding - in separate Shell cores (11, 12) lie, with a shell core (11) on the fixed Vehicle part is arranged and the other shell core (12) on the movable Vehicle part is arranged and wherein the shell cores (11, 12) are realized as sliding along each other rails whose Profiles are formed so that they together a closed Circle for form the magnetic flux between the windings (3 to 6), characterized in that at least one first transformer (1) for data transmission is present and that at least a second transformer (2) for power transmission is present and that in each case a winding (3, 4) of the first transformer (1) and a winding (5, 6) of the second transformer (2) in a common Shell core (11, 12) lying, which for each winding (3 to ...

Description

The The invention relates to an arrangement for contactless transmission of electrical energy between a stationary vehicle part and one in contrast linearly movable vehicle part - preferably between at least one first circuit unit attached to the vehicle body is installed, and at least one second circuit unit, located in a slidably mounted on rails vehicle seat located. This arrangement comprises at least one transformer whose Windings - primary winding and secondary winding - in separate Shell cores lie, with a shell core arranged on the stationary vehicle part is and the other shell core arranged on the movable vehicle part is. The shell cores are as sliding along each other rails realized, whose profiles are designed so that they together a closed circle for form the magnetic flux between the windings.

Furthermore The invention relates to the use of such an arrangement for Triggering of Restraining means, located in a slidably mounted on rails vehicle seat are located.

Out German Patent Application 195 45 220 are various embodiments Such an arrangement for the contactless transmission of signals known: Because the transformers here exclusively the data transmission serve is in all variants described in this document only one winding at a time - primary winding or secondary winding - in one Shell core arranged. A power transmission is not provided here.

From the patent DE 195 38 528 C2 a device for the inductive transmission of electrical energy and data is known. In this case, a plurality of separate inductive circuits are used, each circuit has a stationary primary and connected to the steering wheel secondary power transmission element.

Advantages of invention

With The present invention is an arrangement of the aforementioned Art suggested that a data transfer while transmitting power in linear transformer systems.

This is characterized according to the invention achieved that the arrangement comprises at least two transformers, wherein a first transformer for data transmission and a second transformer for power transmission is being used. The data transfer can bidirectional in half or full duplex mode, while the power transmission usually done in one direction only.

According to the invention is recognized that has been used in many applications, especially in one Motor vehicle, in addition to a contactless signal transmission and a power transmission required or useful. Furthermore, it has been recognized that Although the arrangement known from the prior art, in principle also for power transmission suitable for that but for a simultaneous transmission of data and power two separate transformers are required.

In an advantageous variant of the arrangement according to the invention are for the two transformers the same shell cores used by a winding of the first transformer and a winding of the second transformer lie in a common pot core. To crosstalk between data and to minimize performance, is each pot core with two chambers equipped, so for Each winding is provided with its own chamber.

Basically there There are various possibilities for the realization within the scope of the invention of shell cores and the arrangement of the windings of the two transformers on the shell cores. In a structurally advantageous embodiment is one of the two shell core rails in the form of a first Profile rail with two adjacent H-profiles with common longitudinal leg realized while the other shell core rail in the form of a second rail with two juxtaposed H-profiles is realized, whose juxtaposed longitudinal legs are connected to each other, that in each case an H-profile of the second Profile rail immersed in an H-profile of the first rail. Each H-profile forms the first and second rail a separate chamber for a winding of one of the two transformers, wherein the windings each on the transverse leg of the corresponding H-profile are wound.

It is particularly advantageous if the transformers of the arrangement according to the invention can be installed in a slide rail for a vehicle seat. In this case, the arrangement according to the invention can in fact be used for triggering restraint means which are located in a vehicle seat displaceably mounted on rails. A trigger signal generated by a control unit can then be used with the aid of the first transformer to a vehicle-mounted trigger circuit for the restraining means are transmitted while, in parallel with the aid of the second transformer, the power of a driver activated by the tripping signal can be transmitted to the tripping circuit. It is particularly advantageous in this context, if the second transformer is used in addition to its function as a power transformer as a redundancy path for triggering the retaining means. In this way, an erroneous triggering of the retaining means can be effectively avoided by the retention means are actually triggered only when in addition to the trigger signal and the release signal required for triggering via the redundancy path "power transformer" is applied to the trigger circuit.

drawings

As already mentioned above, there are different ways to design the teaching of the present invention in an advantageous manner and further education. On the one hand to the claims 1 and 5 subordinate claims and on the other hand to the following description of an embodiment of the invention with reference to the drawings.

The 1a and 1b show an inventive arrangement with a data transmitter and a power transformer in cross section ( 1a ) and in perspective ( 1b ).

2 shows a block diagram of an inductive, non-contact data and power transmission by means of an inventive arrangement, as for example in the 1a and 1b is shown.

description of the embodiment

The in the 1a and 1b The arrangement shown comprises two transformers 1 and 2 , The transformer 1 is used for contactless transfer of data between a first circuit unit, which is installed on the vehicle body, and a second circuit unit, which is located in a slidably mounted on rails vehicle seat. The transformer 2 is used for contactless transmission of power between these two circuit units. One application for such an arrangement is in connection with 2 explained in more detail.

The primary windings 3 and 5 the two transformers 1 and 2 lie in two separate chambers 7 and 9 in a first shell 11 while the secondary windings 4 and 6 the two transformers 1 and 2 in two separate chambers 8th and 10 a second shell core 12 lie. The shell core 11 is disposed on the vehicle body, and the shell core 12 is arranged on the sliding vehicle seat.

The cup cores 11 and 12 are realized in the form of mutually sliding rails whose profiles are formed so that together they form a closed loop for the magnetic flux between the primary windings 3 and 5 and the corresponding secondary windings 4 and 6 the two transformers 1 and 2 form. In the present case, the shell core rail 11 as a profile rail with two H-profiles arranged side by side 13 and 15 with common longitudinal leg 17 realized. The other shell core rail 12 is just in case in the form of a rail with two juxtaposed H-profiles 14 and 16 realized, but here the juxtaposed longitudinal leg 18 and 19 the two H-profiles 14 and 16 are connected to each other so that in each case an H-profile 14 respectively. 16 of the shell core 12 in an H-profile 13 respectively. 15 of the shell core 11 dips. Each H-profile forms 13 . 15 and 14 . 16 the two shell cores 11 and 12 a separate chamber 7 to 10 for a winding, primary winding 3 respectively. 5 or secondary winding 4 respectively. 6 , one of the two transformers 1 or 2 , These windings 3 to 6 are each on the transverse leg of the corresponding H-profile 13 to 16 wound.

In 2 is with 20 an airbag control unit, which controls, inter alia, the triggering of retaining means which are located in a slidably mounted on rails vehicle seat. The restraining means may be, for example, a sidebag and / or pyrotechnic belt tensioners. The airbag control unit 20 communicates with a circuit unit 21 which is arranged on the vehicle body. This circuit unit 21 communicates with another circuit unit 22 , which is arranged together with the restraint means in the vehicle seat. The circuit unit 21 has its own power supply 40 , Between the two circuit units 21 and 22 takes place both a data transmission and a power transmission. This is an arrangement with two transformers 1 and 2 provided, as in connection with the 1a and 1b has been described above. The data transmission takes place bidirectionally in half or full duplex mode, while the power transmission here only in one direction from the circuit unit 21 to the circuit unit 22 he follows.

The circuit unit 22 includes two so-called squibs 31 . 32 , These are squibs for pyrotechnic restraints, in the present case a sidebag and a belt tensioner.

With the help of the airbag control unit 20 the squib status can be checked. It is checked if one of the two squibs 31 . 32 There is a short to ground or +, if there is a line break and if the resistance is in the range of 1.5Ω to 6Ω. The airbag control unit sends the test data to retrieve the test data 20 a corresponding test pulse via a CAN bus 23 to a μC 41 the circuit unit 21 The function of a controller for data exchange also with other components, such as controls, the key illumination and various sensors 42 , Has. Via a so-called data physical layer 43 the circuit unit 21 and the inductive data transmitter 1 the test pulse then becomes a corresponding data physical layer 33 the circuit unit 22 transferred and to a μC 34 which also has the function of a controller and with other components, such as controls, the key illumination and various sensors 35 communicates. The μC 34 communicates with an AC / DC FLIC 36 where the test data is available. Due to the test pulse, the test data are now sent to the airbag control unit in the same way 20 transfer. Will be found under this review that the Squibs 31 . 32 are not fully functional, then the corresponding test data as diagnostic data in the airbag control unit 20 stored. The CAN bus 23 It is also used here for diagnostic purposes.

To trigger the retention means with the help of Squibs 31 . 32 sends the airbag control unit 20 an ignition signal to an ignition pulse generator 44 the circuit unit 21 What a separate management 24 is available. The ignition pulse generator 44 then generated ignition pulse is a driver 45 fed, whose frequency is then increased. The energy of the driver 45 becomes inductive via the transformer 2 to a 5W supply 37 the circuit unit 22 transferred and from there a Zündindikator 38 fed to the AC / DC FLIC 36 then via a so-called enable signal 39 to ignite the Squibs 31 . 32 capable.

Parallel to this is the ignition signal of the airbag control unit 20 the μC 41 the circuit unit 21 fed. From here, the ignition signal will go the same way as the test pulse to the AC / DC FLIC 36 the circuit unit 22 transfer. Both the μC 41 the circuit unit 21 as well as the μC 34 the circuit unit 22 can check the ignition information and influence it if necessary. An ignition of the squibs 31 . 32 occurs only when the AC / DC FLIC 36 the ignition information is received both on the data path and a corresponding power transmission takes place.

The power transformer 2 So here additionally serves as a redundancy path for triggering the restraint.

Claims (5)

Arrangement for the contactless transmission of electrical energy between a stationary vehicle part and a vehicle part which is linearly movable in comparison with at least one transmitter ( 1 . 2 ) whose windings ( 3 to 6 ) - primary winding and secondary winding - in separate shell pods ( 11 . 12 ), whereby a shell core ( 11 ) is arranged on the stationary vehicle part and the other shell core ( 12 ) is arranged on the movable vehicle part and wherein the shell cores ( 11 . 12 ) are realized as rails sliding along each other, the profiles of which are formed so as to form together a closed circuit for the magnetic flux between the windings (FIG. 3 to 6 ), characterized in that at least one first transformer ( 1 ) is present for data transmission and that at least one second transformer ( 2 ) is present for power transmission and that in each case a winding ( 3 . 4 ) of the first transmitter ( 1 ) and a winding ( 5 . 6 ) of the second transmitter ( 2 ) in a common pot core ( 11 . 12 ), which for each winding ( 3 to 6 ) a separate chamber ( 7 to 10 ) having. Arrangement according to claim 1, characterized in that the one of the two shell core rails ( 11 ) in the form of a first rail with two H-profiles arranged side by side ( 13 . 15 ) with a common longitudinal leg ( 17 ) is realized and that the other shell core rail ( 12 ) in the form of a second rail with two side by side H-profiles ( 14 . 16 ) is realized, whose juxtaposed longitudinal leg ( 18 . 19 ) are connected to each other such that in each case an H-profile ( 14 . 16 ) of the second rail in an H-profile ( 13 . 15 ) of the first rail dips, each H-profile ( 13 to 16 ) of the first and second rail a separate chamber ( 7 to 10 ) for a winding ( 3 to 6 ) one of the two transformers ( 1 . 2 ) and these windings ( 3 to 6 ) each on the transverse leg of the corresponding H-profile ( 13 to 16 ) are wound. Arrangement according to one of claims 1 or 2, characterized in that the transformers ( 1 . 2 ) are installable in a slide rail for a vehicle seat. Use of an arrangement according to one of claims 1 to 3 for triggering retaining means, which are located in a slidably mounted on rails vehicle seat, wherein one of a control unit ( 20 ) generated trigger signal by means of the first transformer ( 1 ) to a tripping circuit located in the vehicle seat ( 22 ) for the return transmitted in parallel with the aid of the second transmitter ( 2 ) the performance of a driver ( 45 ), which is activated by the trigger signal, to the trigger circuit ( 22 ) is transmitted. Use according to claim 4, characterized in that the second transformer ( 2 ) is used in addition to its function as a power transformer as a redundancy path for triggering the restraint means.