Linear-Resonant Vibration Module with Feedback Control
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Solution Overview
Problem
Unbalanced electric motors used for generating vibrations are inefficient, produce destructive forces, limited in frequency range, and cannot produce linear oscillations effectively, leading to rapid deterioration and high power consumption in devices.
Innovation Solution
Linear-resonant vibration modules that utilize a linear oscillation of a weight or member, driven by rapidly alternating the polarity of one or more driving electromagnets, with feedback control to maintain vibrational frequency at or near the resonant frequency, allowing independent control of amplitude and frequency over a wide range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If unbalanced electric motors are used to generate vibrations, then vibrational forces can be produced, but the motors produce destructive unbalanced forces that cause rapid deterioration of motor parts
Solution Approach 1:
The invention divides the vibration generation function from the rotation function by using a balanced motor that rotates a shaft, which then drives a separate vibration mechanism (such as an eccentric cam or oscillating mass) to produce the required vibrational forces. This segmentation eliminates destructive unbalanced forces in the motor while still achieving the desired vibration output.
2Force
If unbalanced electric motors are used to generate vibrations, then vibrations can be produced, but the motors consume high power and are inefficient
Solution Approach 1:
The invention employs mechanical vibration mechanisms (such as oscillating masses, springs, or resonant structures) driven by a balanced motor to generate vibrational forces. By utilizing resonance and mechanical leverage, the system achieves high vibrational output with lower power input compared to directly using unbalanced motors, thereby improving energy efficiency.
3Force
If unbalanced electric motors are used to generate vibrations, then vibrations can be produced, but the frequency range is limited by the motor's rotational speed
Solution Approach 1:
The invention uses dynamic vibration mechanisms such as oscillating masses connected via springs or flexible elements, which can naturally vibrate at multiple frequencies. By adjusting the stiffness of springs, damping elements, or the mass distribution, the system can operate across a wide frequency range independent of the motor's rotational speed, thereby enhancing adaptability.
4Force
If unbalanced electric motors are used to generate vibrations, then vibrations can be produced, but linear oscillation cannot be achieved effectively
Solution Approach 1:
The invention employs asymmetric vibration mechanisms such as eccentric cams, offset oscillating masses, or non-circular linkages that convert rotational motion from a balanced motor into linear or predominantly linear oscillatory motion. The asymmetric geometry ensures that the vibrational force is directed along a specific linear path, achieving effective linear oscillation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides efficient and directional vibrational forces, extending the lifespan of devices, reducing power consumption, and enabling access to a broader range of vibrational frequencies and amplitudes compared to unbalanced electric motors.
Implementation Method 1
driven by rapidly alternating the polarity of one or more driving electromagnets
Implementation Method 2
with feedback control to maintain vibrational frequency at or near the resonant frequency
Data Source
AI summary
The current application is directed to various types of linear vibrational modules, including linear-resonant vibration modules that can be incorporated in a wide variety of appliances, devices, and systems to provide vibrational forces. The vibrational forces are produced by linear oscillation of a weight or member, in turn produced by rapidly alternating the polarity of one or more driving electromagnets. Feedback control is used to maintain the vibrational frequency of linear-resonant vibration module at or near the resonant frequency for the linear-resonant vibration module. Both linear vibration modules and linear-resonant vibration modules can be designed to produce vibrational amplitude/frequency combinations throughout a large region of amplitude/frequency space.