AC DRIVE DV/DT FILTER USING REVERSE RECOVERY CHARGE OF DIODES

    公开(公告)号:US20210344297A1

    公开(公告)日:2021-11-04

    申请号:US16861887

    申请日:2020-04-29

    Abstract: Passive filters, line replaceable units and a modular power supply are provided. The passive filter comprises an inductor and a diode bridge. The inductor has a first end and a second end. The first end is coupleable to a phase output of an inverter. The diode bridge comprises a first diode and a second diode. The anode of the first diode is coupled to the second end of the inductor and a cathode of the first diode is coupleable to a positive DC bus voltage. The cathode of the second diode is coupled to the second end of the inductor and the anode of the second diode is coupleable to a negative DC bus voltage. The passive filter output is coupleable to cable(s) for an AC electric machine. A reverse recovery charge of the diodes achieves a target DV/DT for an output voltage of the passive filter at operating temperatures.

    Ac drive dv/dt filter using reverse recovery charge of diodes

    公开(公告)号:US11671050B2

    公开(公告)日:2023-06-06

    申请号:US17736483

    申请日:2022-05-04

    CPC classification number: H02P29/50 H02J3/01 H02M1/126 H02P27/08 H03H7/0138

    Abstract: Passive filters, line replaceable units and a modular power supply are provided. In one example the modular power supply has a DC bus link having a positive line and a negative line with at least one passive filter and an inductor having a first end and a second end, the first end coupleable to a phase output. A diode bridge having at least a first diode and a second diode, with an anode of the first diode coupleable to the second end of the inductor and a cathode of the first diode coupleable to the positive line, wherein a cathode of the second diode is coupleable to the second end of the inductor and an anode of the second diode is coupleable to the negative line, and wherein the first diode and the second diode are each configured to produce a combined reverse recovery charge that achieves a target DV/DT for an output voltage of the at least one passive filter.

    INDEPENDENT GROUND FAULT DETECTION USING CURRENT TRANSFORMER

    公开(公告)号:US20210341544A1

    公开(公告)日:2021-11-04

    申请号:US16861375

    申请日:2020-04-29

    Abstract: A fault detection system for a system having a single DC input and a plurality of A/C loads such as an electric or hybrid electric vehicle. A plurality of inverters convert DC to 3-phase A/C and supply A/C power to a corresponding individual A/C load. Each inverter includes a common mode current transformer and a controller. An individual corresponding common mode current transformer is coupled to the 3-phase A/C output of the inverter. An individual corresponding controller is coupled to the output of an individual corresponding common mode current transformer and is coupled to an individual corresponding A/C load. Each controller is configured to detect a fault at the individual corresponding A/C load and in the case of detection of a fault at an individual corresponding A/C load, the corresponding controller disables the A/C load.

    Differential and common mode link dampener

    公开(公告)号:US12113507B2

    公开(公告)日:2024-10-08

    申请号:US18067237

    申请日:2022-12-16

    CPC classification number: H03H7/427 H03H7/0115 H03H7/09

    Abstract: A common mode and a differential mode filter(s) between DC links are provided. Each link has a positive rail and a negative rail. The filter comprises a first inductor respectively connected to each of the positive rail and the negative rail, differential mode damping resistance connected in parallel to each of the first inductor, respectively, and a three-wire choke. The three-wire choke comprises a first wire connected in series with the differential mode damping resistance parallel to the positive rail, a second wire connected in series with the differential mode damping resistance parallel to the negative rail and a third wire connected to common mode damping resistance. The common mode damping resistance is galvanically isolated from differential mode transients flowing through the differential mode damping resistance. The differential mode filter has the differential mode damping resistance, and the common mode filter has the common mode damping resistance.

    DIFFERENTIAL AND COMMON MODE LINK DAMPENER
    9.
    发明公开

    公开(公告)号:US20240204744A1

    公开(公告)日:2024-06-20

    申请号:US18067237

    申请日:2022-12-16

    CPC classification number: H03H7/427 H03H7/0115 H03H7/09

    Abstract: A common mode and a differential mode filter(s) between DC links are provided. Each link has a positive rail and a negative rail. The filter comprises a first inductor respectively connected to each of the positive rail and the negative rail, differential mode damping resistance connected in parallel to each of the first inductor, respectively, and a three-wire choke. The three-wire choke comprises a first wire connected in series with the differential mode damping resistance parallel to the positive rail, a second wire connected in series with the differential mode damping resistance parallel to the negative rail and a third wire connected to common mode damping resistance. The common mode damping resistance is galvanically isolated from differential mode transients flowing through the differential mode damping resistance. The differential mode filter has the differential mode damping resistance, and the common mode filter has the common mode damping resistance.

    AC DRIVE DV/DT FILTER USING REVERSE RECOVERY CHARGE OF DIODES

    公开(公告)号:US20220263452A1

    公开(公告)日:2022-08-18

    申请号:US17736483

    申请日:2022-05-04

    Abstract: Passive filters, line replaceable units and a modular power supply are provided. In one example the modular power supply has a DC bus link having a positive line and a negative line with at least one passive filter and an inductor having a first end and a second end, the first end coupleable to a phase output. A diode bridge having at least a first diode and a second diode, with an anode of the first diode coupleable to the second end of the inductor and a cathode of the first diode coupleable to the positive line, wherein a cathode of the second diode is coupleable to the second end of the inductor and an anode of the second diode is coupleable to the negative line, and wherein the first diode and the second diode are each configured to produce a combined reverse recovery charge that achieves a target DV/DT for an output voltage of the at least one passive filter.

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