Patent · US Active

Primary unit for an inductive charging system and method for operating a primary unit

US11196299B2 · kind B2 · utility

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10Claims

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Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Marius Hassler · Eching, DE
Josef Krammer · Holzkirchen, DE
Florian Niedermeier · Munich, DE

Key dates

Filing date	Sep 27, 2018
Grant date	Dec 7, 2021
Priority date	—
Expiry date	Sep 27, 2038

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T90/14
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A primary unit for an inductive charging system includes a primary coil, which is configured to generate a magnetic field in response to a coil current through the primary coil; a first inverter, which is coupled to the primary coil via a first capacitor and which is configured to charge and/or discharge the first capacitor based on a first input voltage; and a second inverter, which is coupled to the primary coil via a second capacitor and which is configured to charge and/or discharge the second capacitor based on a second input voltage. The primary unit has a control unit, which is configured to identify capacitance information with respect to an effective capacitance of a primary resonant circuit of the primary unit, and to actuate the first inverter and the second inverter depending on the capacitance information in order to effect the coil current through the primary coil.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.