A current injection based resistance identification method and device
By calculating resistance using the current injection method and the least squares method, the problem of uncontrollable current caused by voltage injection is solved, thereby improving the safety and accuracy of resistance identification. This method is applicable to resistance identification of permanent magnet synchronous motors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 伯朗特机器人股份有限公司
- Filing Date
- 2023-04-27
- Publication Date
- 2026-07-24
AI Technical Summary
Existing technologies for identifying the resistance of permanent magnet synchronous motors suffer from voltage injection that leads to uncontrollable current, which can easily cause overcurrent or even burn out the motor or controller, and the identification accuracy is not high.
A current injection-based method is adopted. By setting the d-axis reference current and the actual current, the resistance is calculated using the least squares method to avoid voltage injection. The resistance calculation is performed by combining the current matrix and the voltage matrix to improve accuracy.
It achieves safe and controllable current, avoids overcurrent, improves the accuracy of resistance identification and noise immunity, and meets different identification needs of users.
Smart Images
Figure CN116500438B_ABST