Motor starting locked-rotor detection method based on current variance

• Main Authors: LI FENGPING, GANG JIANHUA, PENG ZHIHUI, HUANG JIBAO, HUANG BO, YANG KAIBO
• Format: Patent
• Language: Chinese; English
• Published: 13.05.2022
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a motor start locked-rotor detection method based on current variance, and the method achieves the precise detection of whether a locked-rotor fault exists in a motor through the detection of the current variance in a specific time window of the soft start of the motor, and the analysis of the current variance and the normal soft start current variance. According to the motor start locked-rotor detection method provided by the invention, the normal soft start current variance when the operation condition of the motor is changed is taken as a reference value, and the capabilities of adapting to different working condition environments, inhibiting parameter drift caused by motor aging and rapidly detecting locked-rotor of the algorithm can be effectively improved. 本发明公开了一种基于电流方差的电机启动堵转检测方法，本发明通过检测电机软启动特定时间窗口内电流方差，并与正常软启动电流方差进行分析，实现对电机是否存在堵转故障进行精准检测。本发明提出的电机启动堵转检测方法将电机运行工况发生改变时的正常软启动电流方差作为基准值，能有效提高该算法适应不同工况环境以及抑制电机老化导致参数漂移及快速检测堵转的能力。