Method for reducing power loss in devices for contactless data and energy transmission, and apparatus for performing the method

US5450076A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Gunter Donig · Poing, DE
• Bruno Scheckel · Ebersberg, DE
• Karl-Reinhard Schoen · Munich, DE

Key dates

• Filing date: Mar 21, 1994
• Grant date: Sep 12, 1995
• Expiry date: Mar 21, 2014

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B5/79
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

Devices for contactless data and energy transfer include a stationary part having at least one coil for data and energy transfer, and a moveable part having at least one coil for data and energy transfer and having at least one memory unit. A method for reducing power loss in the devices includes transferring a test data word from the stationary part to the moveable part at a maximum energy, in an initializing mode, storing the transferred test data word in the memory unit of the moveable part, subsequently reading a test data word out of the memory unit of the moveable part and comparing the transferred test data word and the read-out test data word in the stationary part, reducing an energy supply if the transferred test data word and the read-out test data word match, and raising the energy supply by a defined amount and ending the initializing mode, if the transferred test data word and the read-out test data word do not match. An apparatus for reducing power loss the devices includes a stationary part having a device for contactless data transfer, a device for contactless energy transfer, and a process control connected to the device for contactless data transfer; and a moveab…