车用双三相电动机谐波平面电压注入转子初始位置估计

Initial Rotor Position Estimation for Automotive Dual Three-phase Motors Using Voltage Injection in Harmonic Plane

摘要:

转子初始位置估计是车用双三相永磁同步电动机无位置控制起动与高性能运行的关键。构建脉冲电压注入数学模型，利用谐波平面漏电感凸极性，提出谐波平面电压脉冲序列注入的转子初始位置估计方法。在谐波平面注入脉冲以抑制转矩扰动，并采用超定拟合算法，从电流响应中提取转子位置信息。台架试验验证了该方法的有效性，该方法可实现高精度转子初始位置辨识并显著降低转矩扰动，解决了传统方法中转子初始位置估计精度与低噪声振动难以兼顾的难题。

Abstract:

Initial rotor position estimation （IRPE） is crucial for the sensorless control startup and high-performance operation of automotive dual three-phase permanent magnet synchronous motors （DTP-PMSM）. Based on the established mathematical model of pulse voltage injection and the salient polarity of leakage inductance in the harmonic subspace， an IRPE method based on voltage pulse sequence injection in the harmonic subspace was proposed. Pulse sequences were injected into the harmonic subspace to suppress torque disturbance， and an overdetermined fitting algorithm was adopted to extract rotor position information from the current response. Bench test results verified the effectiveness of the proposed method. The high-precision initial rotor position identification was achieved and the torque disturbance was significantly reduced， thus resolving the inherent dilemma of traditional methods that fail to balance the estimation accuracy of initial rotor position and low noise and vibration performance.