Individual Motor Parameter Determination for Control Accuracy

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Solution Overview

Problem

The existing motor control algorithms based on universal parameters fail to adaptively adjust technical parameters for individual motor differences, leading to low motor control accuracy and suboptimal performance due to conservative settings, resulting in wasted potential and performance fluctuations.

Innovation Solution

A method and apparatus for determining individual motor parameters by testing and calculating a difference evaluation index between the current motor's parameters and a set of stored parameters, with effective parameters being determined if the index is within a preset threshold, allowing for precise adjustments and optimal performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If universal motor parameters are used for all motors, then compatibility and stability are improved, but motor control accuracy and performance utilization deteriorate

Engineering Contradiction:

Improvemotor control stabilityVSAvoidmotor control accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent applies local quality by transitioning from universal parameters to individualized parameters for each motor. The system tests and determines specific parameters (such as resonant frequency, inductance, resistance) for each individual motor, allowing the control algorithm to be customized according to the actual characteristics of each motor, thereby improving control accuracy while maintaining stability through systematic parameter determination.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements parameter changes by modifying the motor control parameters from fixed universal values to variable individual values. The system tests motors to obtain actual parameters and uses these to adjust the control algorithm parameters, enabling the system to adapt to individual motor differences and fully utilize each motor's performance capabilities.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If conservative control algorithm output is used to prevent risks, then motor stability is improved, but performance utilization deteriorates

Engineering Contradiction:

Improvemotor operation stabilityVSAvoidmotor performance output

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies feedback by testing each motor to obtain its actual parameters and using this information to adjust the control algorithm. The system incorporates the tested parameters (resonant frequency, inductance, resistance) into the control algorithm, creating a feedback loop that allows the system to optimize performance based on actual motor characteristics rather than relying on conservative universal settings.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If individual parameter testing and determination is implemented, then motor control accuracy is improved, but system complexity and testing time increase

Engineering Contradiction:

Improvemotor parameter accuracyVSAvoidparameter determination system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by performing parameter testing and determination during the motor assembly phase or before deployment. The system tests motors to obtain parameters such as resonant frequency, inductance, and resistance in advance, and stores these parameters for use in the control algorithm, avoiding the need for complex real-time adjustments during operation.

Inventive Principle:

Principle #10Preliminary action

4Reliability

If individual parameter determination is implemented, then performance consistency across motor batch is improved, but manufacturing process complexity increases

Engineering Contradiction:

Improveperformance consistencyVSAvoidmanufacturing process simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies self-service by enabling the motor system to automatically determine its own parameters through testing. The system performs self-testing to obtain parameters such as resonant frequency, inductance, and resistance, and uses these self-determined parameters to configure the control algorithm, eliminating the need for manual parameter setting and reducing manufacturing complexity.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250020722A1Method and apparatus for determining an individual motor parameter, electronic device, and storage medium

Publication Date: 2025.01.16 AAC ACOUSTIC TECH (SHANGHAI) CO LTD

AI summary

Provided are a method and apparatus for determining an individual motor parameter, an electronic device, and a storage medium. The method includes: testing a first motor parameter of a target type of a current motor in a motor assembly phase, and acquiring a motor parameter set saved in a motor manufacturing phase; calculating a difference evaluation index between the first motor parameter and a second motor parameter of the corresponding type in the motor parameter set; and determining all motor parameters in the motor parameter set to be effective individual motor parameters if the difference evaluation index is less than or equal to a preset index threshold.