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Method for instantly shutting down fan after power cut and structure thereof

A fan and circuit technology, applied in the field of stopping, can solve the problems of accidentally touching the fan, the fan user neglecting the continuous operation state, and reducing the work efficiency.

Inactive Publication Date: 2010-09-29
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to cope with the heat dissipation of the faster and faster computing components, the fan speed requirement will be higher and higher. Therefore, after the fan is powered off, the fan will continue to run inertially for a period of time before completely stopping
[0005] However, traditionally, the inertial operation of this kind of fan after power failure will cause many problems. First, the fan user often accidentally touches the running fan due to negligence of the continuous running state after power failure, resulting in injury.
Secondly, for maintenance personnel, it is necessary to wait for a period of inertial operation until the fan stops completely before performing maintenance. This period of waiting time reduces work efficiency

Method used

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  • Method for instantly shutting down fan after power cut and structure thereof
  • Method for instantly shutting down fan after power cut and structure thereof
  • Method for instantly shutting down fan after power cut and structure thereof

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Embodiment Construction

[0018] By means of the instant stop method of the present invention, the user can be prevented from being injured by accidental contact with the fan still in inertial operation due to negligence after the power is cut off. At the same time, during the maintenance process, because there is no waiting time, the work efficiency can be greatly improved. The following describes the application of the present invention with two embodiments of DC fans, but the application of the present invention should not be limited to the following embodiments.

[0019] Generally speaking, a DC fan uses an internal control circuit to generate a changing magnetic field to drive the fan blades to rotate, and the speed varies with the operating voltage. When a conductor passes current, a magnetic field will be generated around it. If the conductor is placed in another fixed magnetic field, it will generate attraction or repulsion, causing the object to move. When the attraction force is greater than ...

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Abstract

The invention provides a method for instantly shutting down a fan after a power cut and a structure thereof. The method can be used for forcibly shutting down a fan in a short time without an inertia running time. At the time of a power cut, both ends of a coil driving the fan to rotate can be short-circuited, and the inertial motion of the fan after the power cut is utilized in the coil to generate an induction current, so that the coil generates a reversed magnetic field to stop the fan.

Description

[0001] This application is a divisional application of an invention patent application whose filing date is March 23, 2004, whose application number is 200410030289.8, and whose invention title is "method and structure for immediately stopping fan after power failure". technical field [0002] The present invention relates to a stopping method, and in particular to a method and a related structure which can stop the fan immediately after it is powered off. Background technique [0003] In many consumer products, the fan is the main cooling tool. When the system temperature is too high, the fan will be activated to reduce the overall system temperature to achieve the purpose of heat dissipation. When the system temperature drops to a certain value, the fan will stop operating. [0004] Traditionally, in order to prevent the overall system from being burned due to excessive temperature, a cooling fan is usually installed in the system for protection. However, in order to cope...

Claims

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Application Information

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IPC IPC(8): F04D27/00H02P3/22
Inventor 邱进发邱俊隆郭柏村黄文喜
Owner DELTA ELECTRONICS INC