Patent ID: 9128158
Filing Date: 2015-09-08
Classification: G01P,G01R

Abstract:
1. A detection circuit for detecting coil abnormality of a DC fan motor, which is applied to a fan comprising a stator having at least one coil set and a silicon steel set, the coil set wound around the silicon steel set and having a first terminal, a second terminal, and at least one detection terminal, the respective first and second terminals receiving a voltage signal, the detection terminal disposed between the first and second terminals, the detection circuit comprising: at least one detection unit comprising a damper and an inverter, wherein one end of the clamper is connected to the corresponding detection terminal and the other end thereof is connected to an end of the inverter, wherein the clamper performs a clamping process based on the voltage level of the voltage signal received from the detection terminal to generate a regulated voltage signal sent to the inverter, whereby the inverter performs an inverting process based on the received regulated voltage signal to generate an inverted voltage signal; and a processing unit, an end of the processing unit connected to a corresponding end of the inverter, wherein the processing unit compares the received inverted voltage signal with a predetermined value therein to determine to generate a notifying signal.