DE10246671B4 - Contactless energy transfer - Google Patents

Abstract

contactless power transmission for one Door from a fixed frame to a movable door, wherein a feeding induction coil through Induction on a powered induction coil is the energy for one Consumer transfers by the energy transfer on the transmitter side (5) from the frame to the door leaf as the receiver side (6) in the area of one in the door located lock and / or access control device the inductive energy transfer via a on the transmitter side (5) and on the receiver side (6) existing resonant circuit takes place, wherein the coupling is variable and corresponding coupling effects a phase comparison by means of a phase control circuit (10) automatically be compensated.

Description

The The invention relates to a contactless power transmission for a door or the like, at the energy transfer from a fixed frame to a movable door Induction takes place.

In the DE 299 06 699 U1 a door handle is described in which an energy transfer via the bands from the frame surrounding the door takes place on the movable door leaf. In this case, the supply is realized via leads through the bands, each of the two bands via electrically isolated from each other parts makes the power supply. The power supply then goes through the entire door wing on the opposite side, namely in the range of a handle. Here, on the one hand, the supply of a door opener and beyond the electrical supply of a luminous door handle is fed with the supply voltage.

A device for contactless transmission of electrical energy by means of an induction coil, which transmits the voltage in a further coil separated from the first coil, is in the DE 197 26 840 A1 and in the DE 4102892 A1 described.

The The object of the invention is to provide the state of the art to improve that one way the contactless energy transfer at doors is created independently from the door type can be applied.

The The object of the invention is characterized by the features of claim 1 solved. The dependent claims give it a further embodiment of the inventive concept again.

The solution given in the prior art, namely in the DE 299 06 699 U1 , Transmission of energy via the connected hinges requires that such a door leaf must be specially prepared. The preparation consists in laying cables inside the frame or door leaf. This means that only this type of door can be used and universal use is not possible. For this reason, the energy is transferred in the invention where it is needed.

In As a rule, an access control system is used to secure a door used, which are supplied to operate with appropriate energy got to. Furthermore, the access control system has a motorized effect operated door lock together. In addition to the motor-driven door locks can also be used come, in which a corresponding blocking or release means Electromagnet is realized.

By the energy transfer (Transmitter side) from the fixed frame or the frame on the door leaf (receiver side), in the area where the energy is needed, it also becomes one inexpensive solution proposed and above out is this solution also sabotageicherer.

to contactless energy transfer therefore becomes an energy transfer by inductances proposed both on the transmitter side and on the receiver side. at the inductors act These are two coils that are designed as resonant circuits. An oscillator generates a corresponding voltage in one amplified downstream amplifier is amplified. This voltage goes to a resonant circuit on the transmitter side. From the inductance used there, a partial voltage is diverted and fed to a phase locked loop. Of the Phase-locked loop has the task of the resulting from the loose coupling To compensate for coupling effects. The coupling effects arise thereby, that between the resonant circuit of the transmitter side and the resonant circuit the receiver side there is no fixed distance. This results from the fact that between the frame and the door There is an air gap, which is different for doors. Around Therefore, to achieve a far-reaching compensation, therefore proposed to use a phase locked loop. The phase locked loop compares the phase angle of the oscillator with that of the inductance the transmitter side removed phase position of this partial voltage. The resulting control voltage is supplied to the oscillator, the thereby automatically performs a Nachstimmung. Thus, transmitter side stray inductances be compensated. It should be noted that the coupling is variable.

On the receiver side is also a resonant circuit, the induced voltage over a Rectifier feeds a constant current source. The constant current source in turn, supplies a battery that is used to power the lock or the access control device within the door is used.

at the coils within the ones used on the transmitter and receiver sides Resonance circuits can be air coils or even around Coils having a ferrite core.

at one opened Door will be because of too big Air gap between the receiver and the transmitter side does not transmit energy. However, a functional device inside the door In this case, the supply will then be held over through the energy transfer maintained buffered battery.

The Invention is based on two possible Illustrated in the figures illustrated embodiments.

It demonstrate:

1 : A version with air inductors.

2 : An embodiment with inductors incorporating a ferrite core.

To supply the electronics within the door lock or an access control device is a battery 21 needed. To such a battery 21 to load within a door leaf in buffer mode, is an air gap between a door, not shown, and a frame of this battery 21 reloaded without contact. In this case, a transformer with a variable air gap L is used for energy transmission.

The air gap L is thus located between a resonant circuit on the transmitter side 5 and a resonant circuit on the receiver side 6 , The resonant circuit of the transmitter side consists of a coil 22 that with a capacitor 7 is connected in series. From an amplifier 2 will have a connection 4 the capacitor 7 and the coil 22 fed. The amplifier 2 is about a connection 3 with a variable oscillator 1 connected. That the capacitor 7 opposite end of the coil 22 is grounded (reference numeral 8th ).

To be able to compensate for a transmitter-side leakage inductance is from the coil 22 over a connection 9 tapped a partial voltage. This partial voltage becomes a phase control circuit 10 fed. About a connection 12 from the oscillator 1 becomes the amplifier 3 supplied voltage also supplied. By the phase control circuit 10 Thus, an occurring coupling effect can be compensated by the variable coupling. The resulting control signal is via a connection 11 the oscillator 1 fed, thereby an automatic tuning of the oscillator 1 performs.

By the oscillator 1 , which is supplied by an unillustrated supply voltage from the outside, becomes the transmitting side 5 supplied with the appropriate energy. This energy is transferred via the air gap L to the receiver side 6 the energy transmission device. The receiver side 6 also consists of a resonant circuit consisting of an inductor with the coil 13 and a capacitor connected in parallel thereto 14 consists. About connections 15 and 16 becomes a connected rectifier 17 provided. The rectified voltage goes through a connection 18 to a constant current source 20 , The constant current source 20 makes sure about the connections 35 and 19 the connected battery is supplied with the appropriate charging voltage. The supply voltage of the battery is constantly monitored.

At the in 2 illustrated embodiment of a contactless energy transfer is, in the transmitter side 5 and on the receiver side 6 used inductors to coils that are equipped with a ferrite core.

From a generator 23 will have a connection 24 an amplification circuit 27 supplied with the necessary energy for the transmitter side. About a connection 25 becomes a capacitor 29 standing in line with the coil 28 is connected, on the other hand, the coil 28 over a connection 26 with the amplifier 27 connected is.

Also on the receiver side 6 is the coil 30 in series with a capacitor 36 connected. From the condenser 36 goes via a connection 31 and about a connection 32 from the other coil end 30 from the transmitter side 6 received energy to a rectifier 17 , About the connections 33 and 34 The rectified voltage is the battery 21 fed.

The relatively large air gap between the door and the door frame reduces the magnetic coupling. At the same time, the scatter is increased. The coupling is compensated by the corresponding ferrite cores. The primary and secondary leakage inductances are thereby by the capacitors 29 and 36 compensated.

1

variable oscillator

2

amplifier

3

connection

4

connection

5

transmission side

6

Home

7

capacitor

8th

Dimensions

9

connection

10

Phase comparing circuit

11

connection

12

connection

13

Kitchen sink

14

capacitor

15

connection

16

connection

17

rectifier

18

connection

19

connection

20

Constant current source

21

battery pack

22

Kitchen sink

23

generator

24

connection

25

connection

26

connection

27

amplifier

28

Kitchen sink

29

capacitor

30

Kitchen sink

31

connection

32

connection

33

connection

34

connection

35

connection

Claims (7)

Contactless energy transfer for a door from a fixed frame to a movable door, wherein a feeding induction coil, by induction on a powered induction coil, transfers the energy to a consumer by transmitting the energy on the transmitter side ( 5 ) from the frame to the door leaf as the receiver side ( 6 ) in the region of a lock located in the door and / or access control device by the inductive energy transfer via a transmitter on the side ( 5 ) and one on the receiver side ( 6 ) existing resonant circuit, wherein the coupling is variable and corresponding coupling effects by a phase comparison by means of a phase control circuit ( 10 ) are automatically compensated. Contactless energy transfer according to claim 1, characterized in that an oscillator ( 1 ) with the phase control circuit ( 10 ) and a downstream amplifier ( 2 ) for supplying the transmitter-side resonant circuit ( 5 ) is used. Contactless energy transfer according to one of the preceding claims, characterized in that on the receiver side ( 6 ) a rectifier circuit ( 17 ) with a downstream constant current source ( 20 ) is available. Contactless energy transfer according to one of the preceding claims, characterized in that the inductances ( 22 . 13 ) on the transmitter side ( 5 ) and the receiver side ( 6 ) Are air inductances. Contactless energy transfer according to one of the preceding claims, characterized in that the inductances ( 22 . 13 ) on the transmitter side ( 5 ) and on the receiver side ( 6 ) are provided with a ferrite core. Contactless energy transfer according to one of the preceding Claims, characterized in that the energy transfer for a lock, Motor lock and / or access control device is used. Contactless energy transmission according to one of the preceding claims, characterized in that the supply voltage of a battery ( 21 ) is monitored.