Motor Coil Vector Control for Stall Detection and Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional motor control systems struggle with dynamic control of speed, torque, and position with high precision and efficiency, inadequate stall detection, and fail to address acoustic noise and heat generation, leading to suboptimal performance and reliability.
Innovation Solution
A method and device for controlling motors by applying dynamically adjustable sinusoidal currents to each coil, utilizing a feedback-based vector control algorithm to calculate and adjust the current vector based on electrical parameters, allowing real-time optimization of amplitude, phase, and frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional fixed-parameter control strategies are used, then device complexity is reduced, but motor performance optimization and energy efficiency deteriorate
Solution Approach 1:
The patent implements dynamic control by continuously adjusting current amplitude and frequency based on real-time motor state feedback. The control system transitions from fixed parameters to dynamically adjustable parameters, optimizing energy efficiency across varying operating conditions while managing complexity through structured control algorithms.
Solution Approach 2:
The patent employs feedback mechanisms by measuring motor state parameters (current, voltage, position) and using this information to adjust control inputs. The closed-loop control system continuously monitors motor performance and modifies current delivery to maintain optimal energy efficiency, resolving the contradiction between improved energy use and increased system complexity.
2Measurement precision
If traditional control methods are used, then device complexity is minimized, but stall detection capability and rotor position estimation accuracy deteriorate
Solution Approach 1:
The patent replaces mechanical sensor-based position detection with sensorless estimation methods. By using electrical measurements (current, voltage) and mathematical models to estimate rotor position and detect stalls, the system achieves high measurement precision without adding physical sensors, thereby managing complexity through computational approaches rather than hardware additions.
3Object-generated harmful factors
If conventional motor control techniques are used, then acoustic noise and heat generation are not addressed, but if advanced control is implemented, then these harmful factors are reduced
Solution Approach 1:
The patent reduces harmful factors by dynamically adjusting current parameters (amplitude, frequency, phase) based on motor state. By optimizing these electrical parameters in real-time, the system minimizes acoustic noise and heat generation while managing the complexity through systematic parameter control strategies.
4Speed
If open-loop control systems are used, then device complexity is reduced, but dynamic response and precision control deteriorate
Solution Approach 1:
The patent implements closed-loop control by continuously measuring motor state (current, voltage, position) and using this feedback to adjust control inputs in real-time. This feedback mechanism enables fast dynamic response and precise control while managing complexity through structured control algorithms that process feedback information efficiently.
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
Enhances dynamic response, energy efficiency, and stall detection, providing precise control over motor parameters, reducing noise and heat, and improving reliability.
Implementation Method 1
applying a sinusoidal current to every motor coil... transforming coil voltages into a target current vector... dynamically adjusting the sinusoidal current applied to each motor coil based on the target current vector
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
A method for controlling a motor comprising a rotor and a stator, the stator comprising a plurality of coils which are isolated from each other. The method includes applying a dynamically adjustable sinusoidal current to every motor coil, obtaining an electrical parameter for each motor coil, which is either an average voltage over the coil or an instantaneous voltage over the coil, and utilizing a feedback-based vector control algorithm. This algorithm receives the electrical parameter and the applied sinusoidal current for each motor coil to calculate a target current vector, which is determined based on the electrical parameter and the applied sinusoidal current for each motor coil. The method further involves dynamically adjusting for each motor coil the sinusoidal current applied to that motor coil based on the target current vector.