A CURRENT SUPPLY SYSTEM AND A METHOD OF OPERATING SAID CURRENT SUPPLY SYSTEM

    公开(公告)号:EP4002958A1

    公开(公告)日:2022-05-25

    申请号:EP21205675.8

    申请日:2021-10-29

    Abstract: A current supply system for strings of solid-state light sources (34) is disclosed. The current supply system comprises a plurality of terminals (OUT1..OUTn), wherein each of the terminals (OUT1..OUTn) is configured to be connected via a respective current regulator or limiter (32) to a first output terminal of a voltage source (20) and via a respective string of solid-state light sources (34) to a second output terminal of the voltage source (20). A control circuit (40) is configured to generate a reference signal ( V ref ) for the voltage source (20), wherein the reference signal is indicative of a requested output voltage ( V out ) to be generated by the voltage source (20) between the first and the second output terminals of the voltage source (20).
    In particular, the control circuit (40) comprises:
    - a digital feed-forward control circuit (408, 410, 412) configured to compute a digital feed-forward regulation value ( V out_req ) indicative of a requested output voltage by determining a maximum voltage drop ( V LED_MAX ) at the strings of solid-state light sources (34),
    -a digital feed-back control circuit (414) configured to determine (1030) a minimum voltage drop ( V 32_MIN ) at the current regulators or limiters (32) and determine a digital feed-back correction value as a function of the minimum voltage drop ( V 32_MIN ), and
    - a control circuit (40) configured to set the reference signal ( V ref ) after a start-up as a function of the digital feed-forward regulation value ( V out_req ) and then correct the reference signal ( V ref ) as a function of the digital feed-back correction value.

    A METHOD OF OPERATING A COMMUNICATION BUS, CORRESPONDING SYSTEM, DEVICES AND VEHICLE

    公开(公告)号:EP3913864A1

    公开(公告)日:2021-11-24

    申请号:EP21172208.7

    申请日:2021-05-05

    Abstract: A method of operating a CAN bus comprises coupling a first device (10) and second devices (20 1 , ..., 20 n ) to the CAN bus (30) via respective CAN transceiver circuits. The method comprises configuring the first device as a communication master device to transmit first messages carrying operation data message portions indicative of operations for implementation by the second devices, and second messages addressed to the second devices, the second messages conveying identifiers identifying respective ones of the second devices to which the second messages are addressed requesting respective reactions towards the first device within respective expected reaction intervals. The method comprises configuring the second devices as communication slave devices to receive the first messages transmitted from the first device, read respective operation data message portions in said operation data message portions and implement respective operations as a function of the respective operation data message portions read, and to receive the second messages transmitted from the first device and react thereon within said respective expected reaction intervals by transmitting reaction messages towards the first device. The method comprises configuring said respective CAN transceiver circuits to set the CAN bus to a recessive level during transmission of said messages via the CAN bus by the respective first device or second device.

    A method of detecting an overcurrent in a triac
    117.
    发明公开
    A method of detecting an overcurrent in a triac 有权
    在einem Triac中的Verfahren zur Detektion einesÜberstroms

    公开(公告)号:EP2439546A1

    公开(公告)日:2012-04-11

    申请号:EP10306087.7

    申请日:2010-10-06

    CPC classification number: G01R19/16571

    Abstract: The invention concerns a method of detecting an overcurrent in a triac (3), the method comprising: a) during at least part of a conduction phase of the triac, measuring the gate potential (V G ) of the triac; and b) comparing a value based on said measurement with a reference threshold and deducing the presence or the absence of an overcurrent based on said comparison.

    Abstract translation: 本发明涉及一种检测三端双向可控硅(3)中的过电流的方法,所述方法包括:a)在三端双向串联的传导阶段的至少部分期间测量三端双向可控硅开关元件的栅电位(V G); 以及b)将基于所述测量的值与参考阈值进行比较,并且基于所述比较推断过电流的存在或不存在。

    State machine
    120.
    发明公开
    State machine 审中-公开
    Zustandsmaschine

    公开(公告)号:EP2202604A1

    公开(公告)日:2010-06-30

    申请号:EP09180740.4

    申请日:2009-12-24

    CPC classification number: G06F1/025

    Abstract: A state machine for generating signals configured for generating different signals according to the current state (S0, S1, S2, S3, IDLE) of the machine. The state machine is configured to change state both as a function of an internal timer (Cmp(n)) and as a function of signals (Edge(x); Edge (y)) representative of events external to the state machine.

    Abstract translation: 一种用于产生根据机器的当前状态(S0,S1,S2,S3,IDLE)生成不同信号的信号的状态机。 状态机被配置为根据内部定时器(Cmp(n))的功能改变状态,并且作为代表状态机外部事件的信号(Edge(x); Edge(y))的函数。

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