Abstract: A system for monitoring a rotating device includes a sensing unit, a microcontroller and a response unit. The rotating device includes an operation module, and a circuit board electrically connected to the operation module for driving operation of the operation module. The sensing unit is adapted to be disposed on the circuit board, and is configured to generate first detection data related to movement of the circuit board and second detection data related to electrical properties of the circuit board. The microcontroller is configured to receive the first detection data and the second detection data and to generate a control signal. The response unit is configured to receive the control signal and to control operation of the operation module through the circuit board based on the control signal.

Abstract: A composite fan includes an outer frame, a hub body pivotably mounted to the outer frame, and a plurality of fan blades extending outwardly from the hub body. The outer frame includes a main frame body and an outer cover. The main frame body defines an air outlet opening in an axial direction and a plurality of air inlets opening radially. The outer cover is disposed on the main frame body and the outer cover and the main frame body are arranged in the axial direction, such that air is radially introduced into the composite fan through the air inlets and discharged through the air outlet in the axial direction.

Abstract: A grounding structure for a motor stator includes a silicon steel sheet unit, and upper and lower insulating frames clamping the silicon steel sheet unit therebetween. The grounding structure further includes a conductive member and a circuit board. The conductive member is clamped between the silicon steel sheet unit and the lower insulating frame, and protruding from a lower end of the lower insulating frame. The circuit board is disposed at a lower side of the lower insulating frame, and includes a negative contact that is connected to a lower edge of the conductive member.

Abstract: A fan includes a frame member, a fan body, a surrounding plate and a housing unit. The frame member surrounds an axis and defines an accommodating space in which the fan body is disposed. The fan body is rotatable about the axis. The surrounding plate surrounds the frame member and is formed with at least one plate hole extending in a transverse direction transverse to an axial direction of the axis therethrough. The housing unit surrounds the surrounding plate and has a plurality of housing holes extending in the axial direction of the axis therethrough. The housing unit and the surrounding plate cooperatively define a surrounding space therebetween that is surrounded by the housing holes.

Abstract: A fan includes a frame member, a fan body, a surrounding plate and a housing unit. The frame member surrounds an axis and defines an accommodating space in which the fan body is disposed. The fan body is rotatable about the axis. The surrounding plate surrounds the frame member and is formed with at least one plate hole extending in a transverse direction transverse to an axial direction of the axis therethrough. The housing unit surrounds the surrounding plate and has a plurality of housing holes extending in the axial direction of the axis therethrough. The housing unit and the surrounding plate cooperatively define a surrounding space therebetween that is surrounded by the housing holes.

Abstract: A grounding structure for a motor stator includes a silicon steel sheet unit, and upper and lower insulating frames clamping the silicon steel sheet unit therebetween. The grounding structure further includes a conductive member and a circuit board. The conductive member is clamped between the silicon steel sheet unit and the lower insulating frame, and protruding from a lower end of the lower insulating frame. The circuit board is disposed at a lower side of the lower insulating frame, and includes a negative contact that is connected to a lower edge of the conductive member.

Abstract: A fan casing for mounting of a fan includes a frame including four corner segments and four side segments that are arranged alternately with the corner segments, a seat disposed in the frame, and four support members extending radially and outwardly from the seat and connected respectively to the corner segments. Each support member includes a base connected to the seat and having a width reducing in a direction away from the seat, and a rib connected between the base and the corresponding corner segment. The bases are interconnected to surround the seat. Any two adjacent bases are interconnected to form an arc surface facing the corresponding side segment and adapted to absorb shock.