Elektronischer Umrichter und Zugehöriges Beleuchtungssystem und Verfahren zum Betrieb eines Elektronischen Umrichters

Details

Veröffentlichungs-Nr.

EP3829043

Aktenzeichen

EP20206854

Anmeldetag

11. November 2020

Veröffentlichung

28. Juli 2021

Rechtsraum

EP

IPC

H02M1/42H05B45/3725H02M3/335G01R21/06

Abstract

An electronic converter (10) comprises two input terminals (102a, 102b) for receiving an input voltage (Vin,AC; Vin,DC) and a switching stage (110) for supplying a regulated voltage (Vout) or a regulated current (iout) to two output terminals (104a, 104b). A voltage sensing circuit (VS) supplies a signal (Vsense) proportional to the input voltage. A current sensing circuit (CS) supplies a signal (Isense) indicative of an input current (Is). A control circuit (120) samples the signal proportional to the input voltage and the signal indicative of an input current. The current sensing circuit (CS) comprises a shunt resistance (R<shunt>) connected between a first node (N<A>) and a second node (N<C>), a switch (S4) in parallel to the shunt resistance, and a voltage divider between the first node (N<A>) and a supply (Vsupply) node (900) . The control circuit (120) measures a voltage between an intermediate node (N<B>) of the divider and the second node (N<C>) of the current-sensing circuit (CS) for receiving the signal (Isense) indicative of an input current (Ts). The control circuit (120) opens the switch in a first time interval and closes the switch in a second time interval, and determines a value of input power as a function of values of the signal proportional to the input voltage and of the signal indicative of an input current (Ts) that are sampled during the first time interval.

Anmelder

Firmen

OSRAM GmbH
OSRAM S.P.A. - SOCIETA' RIUNITE OSRAM EDISON CLERICI

Land

🇩🇪 Deutschland

Fachgebiete