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
A linear resonant vibration module that utilizes a linearly oscillating weight driven by rapidly alternating electromagnets with feedback control to maintain resonant frequency, allowing for a wide range of amplitude and frequency combinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If an unbalanced electric motor is used to generate vibrations, then vibrational forces can be produced, but the motor produces destructive unbalanced forces that cause rapid deterioration of motor parts
Solution Approach 1:
The patent replaces the traditional mechanical unbalanced motor system with an electromagnetic system. Instead of using a rotating unbalanced mass driven by a motor, the invention uses electromagnetic coils to directly generate linear vibrational forces on a mass, eliminating the mechanical rotation and associated destructive unbalanced forces while maintaining the ability to produce useful vibrations.
2Force
If an unbalanced electric motor is used to generate vibrations, then vibrational motion can be produced, but a far greater amount of power is consumed than the theoretical minimum required
Solution Approach 1:
The patent replaces the inefficient mechanical energy conversion process of unbalanced motors with a direct electromagnetic force generation system. The electromagnetic coils convert electrical energy directly into linear vibrational motion without the energy losses associated with mechanical rotation, friction, and centrifugal forces, achieving power consumption close to the theoretical minimum.
3Force
If an unbalanced electric motor is used to generate vibrations, then vibrational motion can be produced, but the vibration frequency is constrained by the rotational speed of the motor shaft
Solution Approach 1:
The patent implements a dynamic control system that can rapidly adjust the frequency and amplitude of vibrational forces by controlling the switching frequency of the electromagnetic coils. This allows the system to adapt to a wide range of frequency requirements without being constrained by mechanical rotational speed limits, enabling operation from low frequencies up to several thousand Hertz.
4Force
If an unbalanced electric motor is used to generate vibrations, then rotational vibration can be produced, but linear oscillation cannot be achieved effectively
Solution Approach 1:
The patent replaces the rotational motion mechanism with a linear electromagnetic actuation system. The electromagnetic coils generate forces that move the mass directly along a linear path, producing pure linear oscillation without the elliptical or circular motion patterns inherent in rotational unbalanced systems. This enables effective linear vibration generation suitable for applications requiring directional 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
The solution achieves efficient power consumption, reduces destructive forces, and enables the production of linear vibrational forces over a broad frequency range, extending device lifespan and improving performance.
Implementation Method 1
a coil that generates a magnetic force, Fcoil, by application of electrical current, I, in accordance with the relationship Fcoil=BIL
Implementation Method 2
two repelling magnets, 414 and 416, that are magnetically oriented to repel one another... the weight is decelerated and its direction of motion is reversed by a repulsive magnetic force, Frepel, between the repelling magnets
Implementation Method 3
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
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
Various embodiments of the present invention comprise 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. Linear-resonant vibration modules can be designed to produce vibrational amplitude/frequency combinations throughout a large region of amplitude/frequency space.