Dead-beat rotating speed synchronous control method for double permanent magnet synchronous motors

By calculating the inverter voltage difference vector using a full-order deadbeat current tracking controller and speed synchronization conditions, and dynamically allocating the voltage vector, the current tracking and speed synchronization of the dual permanent magnet synchronous motor are achieved. This solves the problems of insufficient response speed and low synchronization accuracy in the dual permanent magnet synchronous motor system, and realizes fast speed synchronization and current tracking.

CN122316163APending Publication Date: 2026-06-30NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Application Number
CN202610245329.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-02
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing technologies for the coordinated control of dual permanent magnet synchronous motors suffer from insufficient response speed, limited synchronization accuracy, and difficulty in simultaneously achieving current tracking and speed synchronization. In particular, they cannot effectively eliminate speed deviations under dynamic operating conditions.

Method used

A full-order deadbeat current tracking controller is used to perform dynamic voltage vector calculation, and the inverter voltage difference vector is calculated through the speed deadbeat synchronization condition. The vector is dynamically allocated to the current tracking controller to achieve current tracking and speed synchronization. Combined with a voltage limiting strategy, control safety is ensured.

Benefits of technology

It achieves high-precision current tracking under rapid dynamic conditions such as load changes, quickly restores speed synchronization, improves system consistency and stability, and requires no additional hardware or complex optimization calculations, making it highly feasible in engineering.

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Abstract

The invention discloses a dead-beat rotating speed synchronous control method for double permanent magnet synchronous motors. The method comprises the following steps: carrying out dynamic voltage vector calculation by adopting a full-order dead-beat current tracking controller; the dead-beat rotating speed synchronous controller calculates an inverter voltage difference vector required by synchronous control through a rotating speed dead-beat synchronization condition; and the difference vectors are distributed to two groups of voltage vectors calculated by a current tracking controller, so that the two inverters generate corresponding expected difference values, and current tracking and rotating speed synchronous control of the double-permanent-magnet synchronous motor under various unbalanced working conditions are realized. According to the invention, the system can still maintain high synchronization consistency and quick response capability when the system is subjected to external disturbance or the operation condition changes.
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