Method for detecting a short-circuit, and power supply module implementing said method

摘要

The present invention relates to a power supply module (100) for an electrical device (10), in particular using direct current, the power supply module (100) including a capacitor-input filter (120) arranged in parallel on the electrical device (10). The power supply module (100) comprises a means (130, 200) for detecting the discharge current (Icc) supplied by the capacitor-input filter (120) following a short-circuit in the power supply module (100). The invention can be used the power supply circuits of automobile electrical devices, in particular the motors of an electric fan unit for creating an air flow in heating, ventilation and/or air-conditioning systems.

主权项

1. A method for detecting a short-circuit in a power supply module (100) for an electrical device (10), in particular using direct current, the power supply module (100) including a capacitor-input filter (120) arranged in parallel on the electrical device (10), characterized in that the method comprises detecting the discharge current (Idc) supplied by the capacitor-input filter (120) following a short-circuit in the power supply module (100) by measuring a voltage (Vdc) across the terminals of a resistive element (130) arranged on the discharge circuit of the capacitor-input filter (120); and
protecting the capacitor-input filter (120) against a polarity reversal of the power supply current by a protective component (130) of the resistive element.