A system and a method for detecting an authorized secondary unit in a system for inductive power transfer

• Main Authors: Dirk Muhlenhoff, Rolf Muller
• Format: Patent
• Language: English
• Published: 02.08.2017
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL

A system and a method for detecting an authorized secondary unit 4 in a system for inductive power transfer, which comprises at least one means 11 for providing a short circuit of the secondary winding structure 10, wherein the system comprises at least one primary-sided system for detecting the short-circuit of a secondary winding structure 10, wherein a verified secondary unit 4 is detectable if a short circuit of the secondary winding structure 10 is detected. The short circuit detection may signify the correct positioning of the two coils. The secondary winding may be detectable by comparing a set or stored value of the load with an actual value of the load, or by evaluating a change of the load value over time. The short circuit may be provided by a switching element which can be a MOSFET or IGBT.