Motor Detection Control System Kickback Voltage Timing
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Solution Overview
Problem
Conventional motors experience inefficiency and noise due to the rotor's magnetic poles passing by a chip, causing the stator's magnetic poles to rotate out of sync, leading to poor performance.
Innovation Solution
A detection control system calculates a minimum current value based on a kickback voltage generated when the third magnetic pole alternates to the fourth magnetic pole, controlling the alternating time to synchronize the polarity change and improve motor efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the rotor's magnetic poles pass by the chip, then the chip detects the rotation position, but the stator's magnetic poles rotate out of sync causing vibrations and noise
Solution Approach 1:
The patent uses feedback control by detecting the kickback voltage generated during magnetic pole alternation and using this information to adjust the alternating time. The control module continuously monitors the motor's operational state and modifies the switching timing based on detected parameters, creating a closed-loop system that eliminates vibrations and noise while maintaining precise rotation detection
Solution Approach 2:
The patent changes the timing parameter of magnetic pole alternation based on the detected kickback voltage characteristics. By adjusting the alternating time according to the minimum current value derived from kickback voltage, the system optimizes the synchronization between rotor and stator magnetic poles, eliminating harmful vibrations and noise while preserving accurate position detection
2Speed
If the third magnetic pole and fourth magnetic pole alternate quickly, then the response speed increases, but the phase shift control becomes difficult to synchronize
Solution Approach 1:
The patent performs preliminary detection of the kickback voltage characteristics before executing the magnetic pole alternation. By analyzing the voltage waveform and determining the minimum current value in advance, the control module pre-calculates the optimal alternating time required to achieve proper synchronization, ensuring both fast response and precise phase alignment
Solution Approach 2:
The patent implements dynamic adjustment of the alternating time based on real-time detection of kickback voltage characteristics. Rather than using a fixed timing value, the system adapts the alternation speed and timing dynamically according to the motor's actual operational state, maintaining optimal synchronization across varying speeds and loads
3Device complexity
If the alternating time is not controlled precisely, then the control system is simpler, but the motor performance deteriorates due to phase shift
Solution Approach 1:
The patent enables the control system to self-adjust the alternating time by autonomously detecting the kickback voltage and calculating the optimal timing parameter. The system uses its own operational characteristics (the kickback voltage generated during switching) to automatically tune the alternating time, eliminating the need for external calibration or complex preset configurations while achieving precise synchronization
Solution Approach 2:
The patent replaces complex mechanical timing mechanisms with electronic detection and control based on electrical parameter measurement. By using voltage detection and digital processing to determine alternating time, the system achieves precise phase control without mechanical linkages, reducing overall system complexity while improving motor efficiency through accurate timing
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 system effectively controls the phase shift of the motor's magnetic poles, reducing vibrations and noise, thereby enhancing motor performance and efficiency.
Implementation Method 1
The chip 2 includes a Hall chip
Implementation Method 2
detecting a kickback voltage value generated when the first current value corresponding to the third magnetic pole is alternated with a second current value corresponding to the fourth magnetic pole
Data Source
AI summary
A detection control system includes a sensing unit, a control module and a driving module for a motor including a rotor and a stator. The sensing unit electrically connects the motor to sense a first and a second magnetic pole of the rotor cross a chip disposed between the rotor and the stator; a third magnetic pole is alternated to a forth magnetic pole of the stator to generate a sensing signal. A detection unit of the control module detects a kickback voltage value generated by a first current value changing to a second current value to calculate a minimum current value to generate a detecting signal. A timing unit receives the sensing and the detecting signal to calculate a first and a second period of time, and a discharging time. The driving module drives the rotor by receiving a control signal the control unit generates by controlling an alternating time.