Multi-Fan Phase Synchronization for Stable Power and Cooling
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Solution Overview
Problem
Existing fan systems face challenges in maintaining consistent rotating speeds across multiple fans due to fluctuations and varying operating requirements, which can lead to unstable power supply and potential damage to electronic devices.
Innovation Solution
A fan driving method that involves obtaining rotating speed signals from multiple fans, comparing phase and frequency differences, and adjusting the duty cycle of driving signals to maintain a preset phase difference and consistent rotating speeds, thereby stabilizing the power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple fans are controlled to operate simultaneously, then cooling efficiency is improved, but rotating speed consistency deteriorates due to fluctuations and varying operating requirements
Solution Approach 1:
The patent implements a feedback mechanism where the first fan's rotating speed signal is fed to the second fan's control unit. The control unit continuously monitors the phase of the first fan's rotating speed signal and adjusts the duty cycle of the second fan's driving signal accordingly to maintain a preset phase difference, thereby ensuring rotating speed consistency among multiple fans
Solution Approach 2:
The patent dynamically changes the duty cycle parameter of the second fan's driving signal based on the detected phase difference from the first fan's rotating speed signal. By adjusting this parameter in real-time, the system maintains consistent rotating speeds across multiple fans while they operate simultaneously for improved cooling efficiency
2Use of energy by moving object
If the rotating speed of fans is adjusted according to power supply requirements, then energy efficiency is improved, but power supply stability deteriorates
Solution Approach 1:
The control unit uses feedback from the first fan's rotating speed signal to dynamically adjust the second fan's duty cycle. This feedback mechanism ensures that when rotating speeds are adjusted for energy efficiency, the adjustments are coordinated across all fans, preventing power supply fluctuations and maintaining stability
Solution Approach 2:
The patent employs dynamic adjustment of the duty cycle based on real-time phase detection. Rather than static speed settings, the system continuously adapts the driving parameters to maintain both energy efficiency and power supply stability through coordinated control of multiple fans
3Stability of the object's composition
If the duty cycle of driving signals is dynamically adjusted, then rotating speed consistency is improved, but control complexity increases
Solution Approach 1:
The patent combines the control functions for multiple fans into a single control unit that processes the first fan's rotating speed signal and generates adjusted driving signals for the second fan. This merging of control functions simplifies the overall system architecture while achieving rotating speed consistency through integrated phase detection and duty cycle adjustment
Data Source
AI summary
The present disclosure relates to a fan system and a fan driving method. The fan system includes a first fan and a second fan, which are used to operate according to a first driving signal and a second driving signal, respectively, and to generate a first rotating speed signal and a second rotating speed signal. The first rotating signal has a first phase, and the second rotating signal has a second phase. The second fan is electrically connected to the first fan to receive the first rotating speed signal, and obtain a detected phase difference between the first phase and the second phase. The second fan is further configured to selectively increase or decrease the duty cycle of the second driving signal according to the detected phase difference, so that the second phase is adjusted to maintain a preset phase difference with the first phase.