Oscillating Motor Control via Pulse Width Modulation
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Solution Overview
Problem
Traditional oscillating motors rely on fixed frequency resonance for oscillation, leading to unstable torque and amplitude when frequency deviates, limiting their versatility and application in various scenarios.
Innovation Solution
A control method for oscillating motors that generates alternating pulses with adjustable pulse widths and frequencies, allowing the motor to operate in full-amplitude, sub-amplitude, in-situ shaking, and composite oscillation modes, enabling flexible operation and multi-purpose functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If fixed frequency alternating signals are used to drive the oscillating assembly, then the oscillating assembly can resonate with the springs and achieve maximum amplitude, but the oscillation frequency cannot be changed greatly and the torque becomes unstable when frequency deviates
Solution Approach 1:
The patent applies dynamics by transitioning from fixed frequency resonance to pulse width modulation (PWM) control. The control unit dynamically adjusts the pulse width and frequency of drive signals based on real-time feedback from sensors, enabling the oscillating assembly to maintain stable torque across varying frequencies. This dynamic control allows frequency adjustment while preserving torque stability through active compensation.
Solution Approach 2:
The patent implements parameter changes by modifying the drive signal characteristics (pulse width, frequency, duty cycle) rather than relying on fixed resonance. The control unit varies these parameters adaptively to maintain optimal performance across different operating conditions, enabling both frequency adjustability and torque stability through controlled parameter variation.
2Adaptability or versatility
If resonant springs are used to support the oscillating assembly, then the motor can operate at resonance frequency for maximum amplitude, but the oscillation frequency cannot be changed greatly
Solution Approach 1:
The patent achieves universality by creating a multi-functional control system that can operate in various modes (full-amplitude oscillation, sub-amplitude oscillation, in-situ shaking, and composite oscillation). The control unit adapts drive parameters based on different application requirements, enabling the same motor structure to serve multiple functions across different frequency ranges without being limited to a single resonance frequency.
Solution Approach 2:
The system uses dynamic parameter adjustment to overcome the fixed frequency limitation of resonant springs. By implementing real-time feedback control and adaptive pulse width modulation, the system can dynamically shift operating frequencies while maintaining performance, thereby expanding the usable frequency range beyond the natural resonance frequency.
3Ease of operation
If different-width pulses are used to drive the oscillating assembly, then various oscillation modes can be achieved, but stable position is lost when driving to another end
Solution Approach 1:
The patent implements feedback control by using sensors to detect the position and state of the oscillating assembly, then feeding this information back to the control unit. The control unit adjusts pulse width and frequency in real-time based on feedback signals, ensuring stable positioning during mode transitions and preventing loss of stable position when driving to different ends.
Solution Approach 2:
The system applies preliminary action by pre-adjusting drive parameters before mode transitions occur. The control unit anticipates position changes and proactively modifies pulse characteristics to maintain stability during transitions, preventing position loss before it occurs.
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 control method stabilizes torque and amplitude across different oscillation modes, allowing the motor to effectively drive various mechanical units with adjustable frequency and pulse parameters, enhancing its versatility and application range.
Implementation Method 1
the control unit is electrically connected with coils and produces alternating pulses to generate alternating magnetic poles on the end faces of the two supporting legs of the U-shaped magnetic yoke
Implementation Method 2
alternating magnetic poles generated by the two supporting legs of the U-shaped magnetic yoke cause the permanent magnets, the second magnetic yoke and the oscillating arm to reciprocate
Implementation Method 3
the oscillating arm oscillates in an oscillation mode corresponding to the pulse parameters; wherein the oscillation mode comprises at least one of a full-amplitude oscillation mode, a sub-amplitude oscillation mode, an in-situ shaking mode and a composite oscillation mode
Data Source
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AI summary
Control method for oscillating motor and osculating motor The control unit is further used for storing the set pulse parameters, and outputting alternating pulses with corresponding pulse widths and frequencies according to the set pulse parameters, so that the oscillating arm oscillates in an oscillation mode corresponding to the pulse parameters; wherein the oscillation mode comprises at least one of a full-amplitude oscillation mode, a sub-amplitude oscillation mode, an in-situ shaking mode and a composite oscillation mode, wherein the composite oscillation mode is generated by superposition of the full-amplitude oscillation mode and the in-situ shaking mode, or is generated by superposition of the sub-amplitude oscillation mode and the in-situ shaking mode.