| 摘要 |
FIELD: electricity.SUBSTANCE: invention relates to electrical engineering. The method of detecting a fault in a pulsed electrical source (1), having a control stage (2) configured to transmit, in response to a setting signal, a control signal which is modulated with a given duty ratio value (?), to a power stage (3) configured to feed electricity to a lead (100), wherein the method includes steps of determining at least one nominal value (?, ?) of the duty cycle during normal operation, and at least one breakdown threshold (?, ?) as a function of the nominal value; determining at least one instantaneous value (?) of the duty cycle of a signal output by the control stage (2); and comparing the instantaneous value with the breakdown threshold. A detection circuit which carries out said method.EFFECT: simple means of detecting and identifying faults.6 cl, 2 dwg |
