Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Motor rotation rate detector and controlling method thereof

A speed control and speed detection technology, applied in the direction of speed/acceleration control, non-electric variable control, control/regulation system, etc., can solve the problems that the speed change of the cooling fan cannot be monitored in the whole process and affect the precision control, so as to reduce noise and Energy consumption, the effect of improving heat dissipation efficiency

Active Publication Date: 2005-02-23
TWINHEAD INT
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be clearly seen from the figure that due to the configuration of the circuit structure, the power of the rotational speed output component 11 is also provided by the pulse width modulation signal, so the square wave can only be output when the pulse width modulation signal is in a high state Therefore, it is impossible to monitor the change of the speed of the cooling fan throughout the whole process. For a system that changes the duty cycle of the PWM signal based on the fan speed and the environment being stable, errors will occur due to the unfixed monitoring time, which will seriously affect the system's performance on the fan. Precise control of the rotational speed makes it impossible to achieve a balance between heat dissipation efficiency, fan noise, and energy consumption

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Motor rotation rate detector and controlling method thereof
  • Motor rotation rate detector and controlling method thereof
  • Motor rotation rate detector and controlling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Please refer to FIG. 3 , which is a functional block diagram of a preferred embodiment of the present invention developed for a cooling fan controlled by a pulse width modulation signal, which is mainly composed of a fan motor 31 and a rotational speed output assembly 32 , and in order to eliminate the lack of conventional devices that cannot continuously output the speed signal, in this embodiment, the first input terminal 331 and the second input terminal 332 are fixedly electrically connected to a fixed voltage source Vcc and a ground point, which is used for the speed output component. 32 continuously increases the power, and a third input terminal 333 receives the pulse width modulation signal sent by the system 30 (as shown in FIG. 4( a )), and then controls the speed of the fan motor 31 . In this way, the rotational speed output component 32 can continuously output a rotational speed signal (as shown in FIG. 30 for precise control of fan speed.

[0031]Please re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A device for detecting rotation speed of motor consists of three input ends, a rotating speed output component and output end. The control method includes setting the first preset rotating speed and its the first frequency, carrying out a study program for motor to work out a league table and the first working period, outputting a pulse width reglulated signal fixed at the first frequency and period to motor for having motor rotated on the first preset speed.

Description

technical field [0001] The invention relates to a motor speed detection device and a control method, in particular to a motor speed detection device and a control method applied to a portable computer. Background technique [0002] Due to the increasing integration of components, heat dissipation is a major issue for all electronic devices today. Taking portable computers as an example, if the heat generated by the internal high-speed integrated circuit chips cannot be effectively dissipated, it will seriously affect the stability of the system Among them, cooling fans are the most widely used and indispensable active cooling components in portable computers. Please refer to FIG. 1 , which is a functional block diagram of a conventional cooling fan controlled by a pulse width modulation (PWM) signal, which is mainly composed of a fan motor 10 and a rotational speed output assembly 11. When the system is connected to the fan motor 10 When a pulse width modulation signal is p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01P3/44G05D13/66
Inventor 陈泉发
Owner TWINHEAD INT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com