Friwo Geratebau Gmbh

Ingolf Bonkhoff

Andreas Hagemeyer

Aniu Liu

The invention relates to a choke circuit and a bus power supply incorporating same. Such a coil choke circuit includes an inductor connected between a first input terminal and a first output terminal, a boost circuit connected between a second input terminal and a second output terminal for increasing the voltage level that is output by the second output terminal. A switching element is connected in parallel to the boost circuit for bypassing the boost circuit. Additionally, a comparator is connected between the first input terminal and the first output terminal for detecting a potential difference across the inductor; wherein in case the comparator detects a potential difference higher than a threshold, the switching element is controlled to be in an OFF state; and in case the comparator detects a potential difference lower than or equal to the threshold, the switching element is controlled to be in an ON state.

Choke circuit for a bus power supply

The present invention relates to a battery charger for charging a battery (), said battery charger comprising an AC/DC power supply means (), a pulse width modulation controlled DC/DC converter () and a control unit () that is connected to the AC/DC power supply means () and the PWM-controlled DC/DC converter (). The battery charger has a maximum output power while avoiding to blow up small battery packs if the control unit () is adapted to measure at least a voltage and a current at terminals of the battery () to be charged, calculate a power at the battery (), compare the calculated power and the nominal maximum power of the AC/DC power supply means (), and transmit a signal to the PWM-controlled DC/DC converter () to adjust a charging current supplied to the battery () based on the comparison result. A temperature at the battery can also be measured.

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Telgte, Germany

Ingolf Bonkhoff