公开(公告)号：US20200232471A1

公开(公告)日：2020-07-23

申请号：US16751070

申请日：2020-01-23

Applicant: PROLIFIC TECHNOLOGY INC.

Inventor： CHIA CHANG HSU ,  CHIH FENG HUANG ,  WEI SHU HSU

IPC: F04D27/00 ,  G01P3/44

Abstract: A device for real-time self-diagnosis of a fan and a method are disclosed for detecting whether a fan body encounters an environment abnormal situation. The fan body includes a motor, a fan and a tachometer. The fan body further includes a microcontroller for receiving a speed signal of the tachometer and calculating a speed value of the fan, and detecting a current value of the motor during operation. The microcontroller can control the motor to drive the fan according to a monitoring period and a control signal transmitted from the control board, and can calculate a speed change amount according to the monitoring period, and can calculate a current change amount. When the speed change amount exceeds a speed change threshold and the current change amount exceeds a current change threshold for a period of time, the microcontroller generates an environmental anomaly signal.