Electric Motor Sensor Correction for Rotor Alignment Timing
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Solution Overview
Problem
Existing electric motor systems face challenges in accurately detecting rotor alignment and speed with minimal resources, leading to potential errors in stator tooth activation timing, which can impede rotor rotation and potentially damage supporting circuitry.
Innovation Solution
The implementation of an alignment sensing mechanism using three sensors to determine rotor alignment relative to stator teeth, with error detection and correction processes that utilize timestamps and counters to manage stator tooth activation and compensate for processing offsets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sophisticated rotor speed and position detection processes are implemented, then measurement precision is improved, but device complexity and resource consumption increase
Solution Approach 1:
The patent segments the rotor alignment detection process into discrete steps: obtaining current rotor alignment, comparing with expected alignment values, detecting errors when mismatches occur, and implementing correction mechanisms. This segmentation allows the system to achieve sophisticated detection accuracy while maintaining manageable processing requirements through modular, step-by-step operations rather than requiring complex continuous processing.
2Reliability
If error detection and correction processes are implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the detected rotor alignment is continuously compared against expected alignment values, and correction actions are taken based on detected errors. This feedback loop ensures reliable stator tooth activation by constantly monitoring and adjusting for alignment deviations, achieving high reliability through iterative correction rather than requiring overly complex predictive models.
3Measurement precision
If resource-intensive error detection processes are used, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The patent applies partial action by implementing error detection and correction only when necessary - specifically when the detected rotor alignment does not match the expected alignment within acceptable tolerances. Rather than continuously performing computationally intensive verification, the system selectively applies correction processes only when errors are suspected or detected, reducing overall energy consumption while maintaining measurement precision when it matters most.
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
This approach enables reliable rotor alignment and speed estimation with reduced resource intensity, minimizing errors in stator tooth activation and preventing damage to motor components.
Implementation Method 1
alignment sensing mechanism using three sensors to determine rotor alignment relative to stator teeth
Implementation Method 2
Electromagnetic fields may be formed, such as on a portion of a stator, and the resulting force interaction between a portion of a rotor and the formed electromagnetic field may provide a torque on the rotor
Data Source
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AI summary
The present techniques generally relate to electric motor which may include one or more sensors usable to determine rotor alignment and/or speed. A method and apparatus for rotor alignment and/or speed error detection and/or correction are proposed, such as using signals from one or more sensors. A method and apparatus for controlling stator tooth activation based, at least in part, on corrections and offsets is also disclosed.