What is the main cause of high-frequency vibration in the electric folding windows drive system?
Release Time : 2025-04-09
Electric folding windows have become a common window solution in modern buildings due to their convenience and intelligent design. However, their motor drive system may generate high-frequency vibration during operation, affecting user experience and shortening the life of the equipment.
The motor rotor is the core component of the drive system, and its manufacturing accuracy directly affects the operational stability. If the rotor has problems such as uneven mass distribution and dynamic balance deviation during processing, centrifugal force will be generated during high-speed rotation, causing high-frequency vibration. In addition, the uneven air gap between the rotor and the stator will cause an imbalance in the distribution of electromagnetic force, further exacerbating the vibration. Such problems are mostly caused by insufficient production process control and need to be solved through high-precision processing and dynamic balancing tests.
The drive system of electric folding windows usually relies on gear sets to achieve deceleration and torque transmission. If the gear tooth shape design is unreasonable, the processing accuracy is insufficient or the lubrication is poor, it will cause impact force during meshing and cause high-frequency vibration. For example, although helical gears can reduce noise, if the installation deviation is too large, it may still cause vibration due to axial force imbalance. Optimizing gear parameters, using high-precision processing and forced lubrication systems can effectively alleviate such problems.
The inverter of the motor drive system will generate high-order harmonics during operation, causing voltage and current waveform distortion. These harmonics will cause electromagnetic force fluctuations, causing the motor to produce high-frequency vibrations. In addition, if the power supply voltage is unstable or there is a three-phase imbalance, the vibration phenomenon may also be aggravated. The influence of electrical factors on vibration can be reduced by suppressing harmonics and optimizing power quality through filters.
If the motor drive system is not installed firmly or there is a resonant frequency match between it and the window structure, the vibration effect will be amplified. For example, loose fixing bolts and insufficient rigidity of the mounting base may cause vibration to be transmitted to the window. In addition, insufficient damping characteristics of the window material itself will also aggravate the vibration amplitude. Improving the installation process, using vibration isolation materials or adjusting structural parameters can effectively suppress resonance.
As a key component supporting the motor rotor, the wear or poor lubrication of the bearing will directly lead to increased vibration. For example, damage to the ball or raceway surface of the rolling bearing will generate periodic impact force; rupture of the lubricating oil film of the sliding bearing may cause dry friction vibration. Regularly checking the bearing status and using high-performance lubricants can extend the bearing life and reduce the risk of vibration.
Electric folding windows are exposed to the outdoor environment for a long time, and changes in temperature and humidity will cause material performance degradation. For example, plastic gears tend to become brittle at low temperatures, and metal parts produce stress concentration due to thermal expansion and contraction, which may cause vibration. In addition, material fatigue caused by long-term operation will also gradually increase vibration. Selecting weather-resistant materials and strengthening environmental adaptability design can delay the deterioration of vibration.
If the control algorithm of the motor drive system does not fully consider the load change, it may cause speed fluctuations, which in turn cause vibration. For example, when the folding window encounters a sudden change in resistance during the opening and closing process, if the control algorithm responds with a lag, the vibration will be aggravated.
By optimizing the control strategy and increasing sensor feedback, the system's adaptability to load changes can be improved and the risk of vibration can be reduced.
The high-frequency vibration problem of the electric folding windows motor drive system involves multiple factors such as mechanics, electrical, installation, and environment. By improving manufacturing accuracy, optimizing transmission design, suppressing electrical interference, improving installation technology, strengthening material protection, and optimizing control algorithms, the vibration level can be significantly reduced, and product reliability and user experience can be improved. In the future, with the development of intelligent sensors and adaptive control technology, vibration problems are expected to be solved more accurately.