基于电角度相位补偿的死区在线补偿算法设计

Design of Online Deadtime Compensation Algorithm Based on Electrical Angle Phase Compensation

伺服系统在工业自动化领域得到了广泛应用。为解决伺服系统中由死区效应引起的相电流畸变、转矩脉动及对伺服系统响应性能的影响,提出了一种基于电角度相位补偿的死区补偿方法。该方法补偿编码器相位延时导致的电角度相位差,通过模型预测速度控制,对多个电流环周期的电角度进行预测,并针对Sigma-Delta ADC采集中的线性相位延时进行补偿,以此判断真实电流极性。实验结果验证了所提死区补偿方法的有效性。

Servo systems have been widely used in the field of industrial automation.To address the issue of phase current distortion,torque fluctuation,and the impact on the responsive performance of the servo system caused by the deadtime effect in servo system,a method of deadtime compensation based on electrical angle phase compensation is proposed.The method compensates for the phase difference in electrical angle due to the encoder phase delay,predicts the electrical angle over multiple current loop cycles through model prediction speed control,and compensates for the linear phase delay in the Sigma-Delta ADC acquisition,thus determining the true current polarity.Experimental results verify the effectiveness of the proposed deadtime compensation method.