Motor control device

The motor control device employs multiple estimators and band elimination filters to address the challenge of torque ripple frequency shifts, enhancing disturbance compensation and vibration suppression across varying angular velocities.

JP2026028439APending Publication Date: 2026-02-20JTEKT CORP
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Patent Information

Application Number
JP2024130853
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-08-07
Publication Date
2026-02-20

AI Technical Summary

Technical Problem

Existing motor control devices struggle to effectively compensate for torque ripple disturbances across varying angular velocities, as the frequency of torque ripple can shift outside the target range, reducing the effectiveness of vibration suppression.

Method used

A motor control device with a disturbance observer unit featuring multiple estimators and processing units, including band elimination filters, to simultaneously compensate for disturbances at different frequencies by removing specific frequency components, thereby preventing control interference and phase lead.

Benefits of technology

The device achieves more effective compensation for disturbances, ensuring robust vibration suppression across varying operating conditions by appropriately handling multiple frequency components.

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Abstract

To provide a motor controller capable of more appropriately compensating for the influence of disturbance.SOLUTION: The motor control device includes a disturbance observer unit 33. The disturbance observer unit 33 includes at least two estimators and at least two processing units arranged in parallel with each other. The first estimator 41A calculates a first estimated disturbance f1 ^ for compensating for the influence of the components of the disturbance Tld at the first frequency Tld1. The second estimator 41B calculates a second estimated disturbance f2 ^ for compensating for the influence of the components of the disturbance Tld at the second frequency Tld2. The first processing unit 42A removes the components of the second frequency Tld1 from the first estimated disturbance f2 {circumflex over ()}. The second processing unit 42B removes the components of the first frequency Tld2 from the second estimated disturbance f1 {circumflex over ()}.SELECTED DRAWING: Figure 2
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Citation Information

Patent Citations

  • Motor control device

    WO2023053212A1