公开(公告)号：EP4247123A1

公开(公告)日：2023-09-20

申请号：EP22162616.1

申请日：2022-03-17

申请人： Tridonic GmbH & Co KG

发明人： Marte, Patrick ,  Wynnyczenko, Oliver ,  Reimondez, David

IPC分类号： H05B47/26 ,  H05B45/50 ,  H05B45/375 ,  G01R31/52 ,  G01R19/25

摘要： The invention relates to a method for detecting an isolation fault condition of a LED module supplied with electrical power by a non-isolated switched LED converter, the switched LED converter having a control circuit for issuing a control signal for at least one switch and being supplied with at least one feedback signal from the LED in order to implement a feedback-controlled operation of the LED module. The method comprises the step of: obtaining and analysing a signal indicating the operation frequency of the switch of the switched converter in order to evaluate the contribution of a harmonic in the frequency range of a mains voltage supplying the converter in said signal, and stopping or reducing the electrical power supplied to the LED module in case the contribution of said harmonic exceeds a given threshold value during at least a preset time period or preset number of cycles.