Patent ID: 9186120
Filing Date: 2015-11-17
Classification: A61B,H02J

Abstract:
1. An inductive coupler for transmitting electrical energy between two units that are rotatable relative to each other, including: a power generator for generating a pulsed DC voltage or an AC voltage from an input DC voltage supplied to the power generator; at least one resonance circuit having at least one resonance capacitor and an inductive power transmitter having a primary side and a secondary side for coupling the electrical energy between the rotatable units for feeding a load with a load voltage and a load current; a control unit arranged on the primary side of the inductive power transmitter and coupled for measuring the input DC voltage supplied to the power generator, wherein the control unit maintains at least one of the load voltage and the load current substantially constant by determining and setting a frequency of the power generator in dependence of the input DC voltage, using at least one of a mathematical function and a table of values generated prior to measuring the input DC voltage, and wherein the at least one of the mathematical function and the table of values represent a dependency of the frequency upon the input DC voltage and a relationship between the load voltage and the input DC voltage.