Communications: electrical – Continuously variable indicating – With meter reading
Patent
1992-04-20
1994-07-12
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
34087031, 340653, 455 78, 324110, 324133, 365101, H04Q 100
Patent
active
053292740
ABSTRACT:
An apparatus for contactless data and energy transmission and includes a stationary part having device for transmitting and receiving data and device for generating energy. A movable part has a plurality of rectifier devices each with at least one output and modulators each being connected downstream of a respective one of the rectifier devices. A first pair of coils is connected to the device for transmitting and receiving data and to the rectifier device for transmitting data from the stationary part to the movable part. A second pair of coils is connected to the device for generating energy and to the rectifier device for transmitting energy from the stationary part to the movable part. The coils in the stationary part are arbitrarily associated with the coils in the movable part, and data is transmitted from the movable part to the stationary part by a load variation at the coil of the movable part not being used for energy transmission. Controllable semiconductor elements each having a load path are connected between the at least one output of a respective one of the rectifier devices and a charge capacitor at which an unregulated operating voltage can be picked up, for delivering output signals of the rectifier device to the charge capacitor. A method for operating the apparatus includes ascertaining which coil is used for energy transmission during an initializing time within the movable part, and thereupon disconnecting the rectifier device and the modulator from the charge capacitor through the applicable controllable semiconductor element.
REFERENCES:
patent: 4434400 (1984-02-01), Halder
patent: 4697183 (1987-09-01), Jenning et al.
patent: 4864633 (1989-09-01), Chatelot
patent: 4928087 (1990-05-01), Kreft et al.
patent: 5070500 (1991-12-01), Horinouchi
Donig Gunter
Reiner Robert
Scheckel Bruno
Schon Karl-Reinhard
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
Yusko Donald J.
Zimmerman Brian
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