Bayerische Motoren Werke Aktiengesellschaft

Det International Holding Limited

Daniel Weida

Manuel Raimann

Matthias Staehli

An electronic device, a power factor correction filter, and an electronic device are provided. The electronic device includes at least one first inductor, a second inductor, a first comparator circuit, a second comparator circuit, a first reference signal generator, and a second reference signal generator. The first inductor and the second inductor are coupled inductors. The first/second comparator circuit is coupled at a first input to a first/second actuating element, at a second input to the first/second reference signal generator, and at an output to a first/second control circuit. The first/second control circuit is coupled to the first/second inductor in order to output a first/second current signal to the first/second inductor. The first and second reference signals are generated such that the two reference signals differ from each other with respect to time, in order to reduce a deviation from a predefined phase shift between the first current signal and the second current signal.

Electronic device, power factor correction filter, and an on-board charging device

A voltage converter is designed to convert an alternating input voltage into a direct output voltage. The voltage converter includes a first sub-converter having a first switch half-bridge, which is coupled to a first pole of the input voltage by a first main coil, and a second sub-converter having a second switch half-bridge, which is coupled to the first pole of the input voltage by a second main coil. In addition, the voltage converter includes a diode half-bridge, which is jointly used by the first sub-converter and the second sub-converter. The voltage converter has a first return coil and a second return coil, which couple a center point of the diode half-bridge to a second pole of the input voltage. The first and second main coils and the first and second return coils form a coupled choke, the coupled choke having a choke core. The choke core has at least one outer leg, which is surrounded by windings of the first and/or second main coil and/or of the first and/or second return coil, and at least one center leg, which is not surrounded by windings of the main coils or of the return coils. The outer leg and the center leg have materials with different permeabilities.

Voltage converter having coupled PFC choke

A controller for determining the duty-ratio for a pulse width modulator of a converter includes an inner current loop, an outer voltage loop and a multiplier with an input voltage feed forward to connect both loops. A prediction unit determines a correction signal ithat is added to the reference current iby means of an adder and it further determines a sample correction signal to correct the current samples in the current loop. This error-controlled duty-ratio prediction with sample correction results in an improved total harmonic distortion as well as in an improved power factor of the converter.

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Munich, Germany

Daniel Weida