一种基于定子电流的永磁同步电机电压动态轨迹预测方法及系统
By using a voltage dynamic trajectory prediction method for permanent magnet synchronous motors based on stator current, the problem of lack of prediction for voltage vector dynamic trajectory in traditional methods is solved, achieving precise control of voltage vector and improving the control accuracy and stability of the field weakening acceleration process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HARBIN INST OF TECH
- Filing Date
- 2025-05-20
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional analysis methods for permanent magnet synchronous motors lack effective means to predict the magnitude and direction changes of the voltage vector during the transition from a stationary state to the field weakening region, making it difficult to characterize the dynamic trajectory characteristics of the voltage vector.
A method for predicting the dynamic voltage trajectory of a permanent magnet synchronous motor based on stator current is adopted. By defining the voltage slope K, the relationship between the voltage slope KMTPA and the stator current is is calculated when the maximum torque per ampere MTPA is reached. The key current thresholds is,c and is,p are determined, and the current limit value is,lim is set to determine the maximum voltage slope Kmax and predict the dynamic voltage trajectory.
It significantly improves the control accuracy of the field weakening transition process, reduces the fluctuation amplitude of current and voltage, reduces the risk of inverter overmodulation, and is suitable for high real-time industrial scenarios.
Smart Images
Figure CN120474406B_ABST