DC Motor Controller Torque Fluctuation Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor noise reduction technologies are inadequate in addressing minute torque fluctuations, which cause significant motor vibration and noise, particularly in direct-current motors.
Innovation Solution
A motor controller that generates a drive signal by superimposing a compensation voltage on the direct-current voltage to cancel torque fluctuations in a no-load rotation state, stabilizing the motor torque and reducing vibration and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If mechanical features of components are optimized to reduce noise, then noise reduction is achieved, but the design process becomes difficult and troublesome
Solution Approach 1:
The patent replaces mechanical noise reduction methods with an electrical control approach. Instead of optimizing mechanical features of motor components, the invention uses a control device that adjusts drive signals to compensate for torque fluctuations, thereby reducing noise through electrical means rather than mechanical design modifications
Solution Approach 2:
The patent changes the electrical parameters of the drive signal to achieve noise reduction. By adjusting voltage, current, or frequency parameters dynamically to compensate for torque fluctuations, the system reduces noise without modifying mechanical component parameters
2Object-affected harmful factors
If direct-current voltage is adjusted to reduce noise, then some noise reduction is achieved, but minute torque fluctuations are not sufficiently addressed
Solution Approach 1:
The patent implements a feedback control mechanism where torque fluctuations are detected and compensation signals are generated based on the detected fluctuations. This closed-loop feedback system continuously adjusts the drive signal to maintain stable torque and reduce noise, addressing the insufficiency of simple voltage adjustment
Solution Approach 2:
The patent applies preliminary anti-action by generating compensation signals that counteract torque fluctuations before they cause significant noise and vibration. The control device proactively adjusts the drive signal to prevent torque instability rather than merely responding to it
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 effectively reduces motor noise and vibration by canceling torque fluctuations caused by braking, flux changes, and cogging torque, resulting in a more stable motor operation and reduced noise during motor usage.
Implementation Method 1
a compensation voltage for generating a compensation torque that can cancel torque fluctuations
Data Source
AI summary
A motor controller that outputs a drive signal to a direct-current brush motor to drive the motor is provided. The motor controller includes a drive signal generating section that generates the drive signal. The drive signal generating section generates the drive signal by superimposing on a direct-current voltage a compensation voltage for generating a compensation torque that can cancel rotation torque fluctuations in a no-load rotation state of the motor.