Rotor bar breakage data obtained from fatigue test

The data hereby provided was acquired during a fatigue test developed at the Department of Electrical Engineering, Universitat Politècnica de València (Universidad Politécnica de Valencia, Spain) in 2011 by PhD student Vicente Climente-Alarcon under supervision of Prof. Martin Riera-Guasp. The fatigue test involved subjecting a 1.5 kW, 1 pole pair induction motor to severe cycling until a bar breakage naturally developed. The cycling consisted of a Direct-on-line (DOL) startup followed by a stationary operation period of at least 10 seconds. A plug stopping was added at the later stages of the test. To maximize the possible damage to the rotor cage, a high load inertia caused heavy (long) startup and stopping transients. ******* Epochs ******* Since the bar breakage did not develop naturally, the rotor cage was successively weakened, defining three stages in the fatigue test: original rotor, lathed rotor and weakened bar. The data shared here corresponds only to roughly the last one, beginning at cycle 79008, in which the end of one bar was narrowed by boring holes in its connection to the end ring. Some previous cycles (79000 to 79007) are also shared. All the details about the fatigue test can be found (in Spanish) in: Climente Alarcón, V. (2012). Aportación al mantenimiento predictivo de motores de inducción mediante modernas técnicas de análisis de la señal. Universitat Politècnica de València. doi:10.4995/Thesis/10251/15915. The state of the rotor during the provided cycles is as follows: Cycles State 79000-79007 Lathed 79008-79112 Lathed and one 3 mm diameter hole 79113-80187 Lathed and two 3 mm diameter holes 80188-80404 Lathed and two 3 mm diameter holes (current sensors changed) 80405-80857 Lathed and two 4 mm diameter holes 80858-81215 Lathed, one 4 mm and one 4.5 mm diameter holes. Bar completely broken @ 81071 81216-81653 Bar broken 81654-81882 Broken bar rests removed 81883-82265 Bar cut also at the other end ******* Data ******* The data provided here only contains the current waveform in phase C excluding the plug stopping, ambient temperature at the beginning of the cycle, motor temperature at the beginning of the cycle and maximum motor temperature during the provided data cycle (which coincides with the motor temperature at the end of the stationary period). Stationary rotational speed, as captured by an encoder, is also included. For an easier handling, all these magnitudes are stored in a single column in each file, for instance: Contents of file 81571.txt 81571 -> Cycle number, must coincide with the name of the file 26.6 -> Ambient temperature at the beginning of the cycle in ºC 78.2 -> Motor temperature at the beginning of the cycle in ºC 85.3 -> Motor temperature at the end of the recorded period in ºC 48.0 -> Rotational speed during the stationary period in Hz 0.000000 -> Beginning of the current waveform in phase C in A 0.002083 0.000000 -0.002083 0.004167 0.004167 0.002083 · · The current waveform is sampled at 5 kSamples/second and it spans around 20 seconds, of which at least 10 correspond to stationary operation. Different sensors were used during the fatigue test, and hence the precision of the current measurements may vary in the provided data. However, the cycles 80188-82265, including the bar breakage itself, were captured using the same sensors and configuration. The motor temperature corresponds to the value measured inside the connection box on the stator yoke. ******* Publications ******* Further details can be found in the publications where data from the fatigue test have been analyzed: V. Climente-Alarcon, J. A. Antonino-Daviu, E. Strangas, M. Riera-Guasp, “Bar breakage mechanism and prognosis in an induction motor,” in Proc. SDEMPED, Valencia, Spain, 2013, pp. 538–545, doi: 10.1109/DEMPED.2013.6645775 V. Climente-Alarcon, J. A. Antonino-Daviu, A. Haavisto, A. Arkkio, “Evolution of high order fault harmonics during a bar breakage with compensation,” presented at the International Conf. Electrical Machines ICEM, Berlin, Germany, Sep. 2–5, 2014, doi: 10.1109/ICELMACH.2014.6960441 V. Climente-Alarcon, J. A. Antonino-Daviu, E.G. Strangas, M. Riera-Guasp, “Rotor-bar breakage mechanism and prognosis in an induction motor,” IEEE Trans. Ind. Electron., vol. 62, no. 3, Mar. 2015, pp. 1814-1825, doi: 10.1109/TIE.2014.2336604 V. Climente-Alarcon, D. Nair, R. Sundaria, J. A. Antonino-Daviu, Antero Arkkio, “Combined Model for Simulating the Effect of Transients on a Damaged Rotor Cage,” IEEE Trans. Ind. Appl., vol. 53, no. 4, Jul.-Aug. 2017, pp. 3528-3537, doi: 10.1109/TIA.2017.2691001 V. Climente-Alarcon, A. Arkkio, J. Antonino-Daviu, “Study of thermal stresses developed during a fatigue test on an electrical motor rotor cage,” International Journal of Fatigue, vol. 120, Mar. 2019, pp. 56-64, doi: 10.1016/j.ijfatigue.2018.11.003本数据集采集自2011年西班牙瓦伦西亚理工大学（Universitat Politècnica de València）电气工程系开展的一项疲劳试验，该试验由博士生Vicente Climente-Alarcon在Martin Riera-Guasp教授指导下完成。试验对象为一台1.5 kW、极对数为1的感应电机，通过严苛的循环加载直至导条自然断裂。试验循环流程为：直接在线启动（Direct-on-line, DOL）后维持至少10秒的稳态运行，试验后期新增了反接制动停车（plug stopping）环节。为最大化对转子笼（rotor cage）的损伤，试验采用高负载惯量以产生剧烈且持续时间较长的启动与停车暂态过程。 ******* 试验阶段 ******* 由于导条未自然断裂，试验人员通过逐步弱化转子笼的方式设置了三个疲劳试验阶段：原始转子、车削加工后转子、弱化导条。本次共享的数据仅对应最后一个阶段，起始于第79008个循环，该阶段中一根导条与端环的连接处通过钻孔实现截面收窄。本次共享还包含此前的部分循环（79000至79007）。有关该疲劳试验的全部细节可参阅以下西班牙语文献： Climente Alarcón, V. (2012). 基于现代信号分析技术的感应电机预测维护研究. 瓦伦西亚理工大学. doi:10.4995/Thesis/10251/15915. 本次共享循环对应的转子状态如下： 79000-79007：车削加工后转子 79008-79112：车削转子，且在一根导条与端环连接处钻3mm直径孔1个 79113-80187：车削转子，且在一根导条与端环连接处钻3mm直径孔2个 80188-80404：车削转子，且在一根导条与端环连接处钻3mm直径孔2个（更换电流传感器） 80405-80857：车削转子，且在一根导条与端环连接处钻4mm直径孔2个 80858-81215：车削转子，且在一根导条与端环连接处分别钻4mm、4.5mm直径孔各1个 81071时刻导条完全断裂 81216-81653：导条已断裂 81654-81882：移除断裂导条残余 81883-82265：另一端导条亦被切断 ******* 数据说明 ******* 本次提供的数据仅包含剔除反接制动停车环节的C相电流波形、循环起始时的环境温度、循环起始时的电机温度、本次数据循环周期内的最高电机温度（该温度与稳态运行阶段结束时的电机温度一致），以及通过编码器（encoder）采集的稳态转速。为便于处理，所有参数均存储于单个文件的单列数据中，示例如下： 文件81571.txt内容说明： 81571：循环编号，需与文件名一致 26.6：循环起始时的环境温度，单位为℃ 78.2：循环起始时的电机温度，单位为℃ 85.3：记录周期结束时的电机温度，单位为℃ 48.0：稳态运行阶段的转速，单位为Hz 0.000000：C相电流波形起始点，单位为A 0.002083 0.000000 -0.002083 0.004167 0.004167 0.002083 · · 电流波形采样率为5千采样点每秒，总时长约20秒，其中至少10秒为稳态运行阶段。试验过程中使用过不同的传感器，因此本次提供数据的电流测量精度存在差异。但包含导条断裂过程在内的80188-82265循环区间，均采用同一套传感器与配置进行采集。电机温度为定子轭（stator yoke）接线盒内的实测值。 ******* 相关发表文献 ******* 有关该疲劳试验数据的进一步分析细节可参阅以下发表文献： 1. V. Climente-Alarcon, J. A. Antonino-Daviu, E. Strangas, M. Riera-Guasp, "感应电机导条断裂机理与预后分析"，发表于2013年西班牙瓦伦西亚SDEMPED会议，页码538-545，doi: 10.1109/DEMPED.2013.6645775 2. V. Climente-Alarcon, J. A. Antonino-Daviu, A. Haavisto, A. Arkkio, "带补偿的导条断裂故障高阶谐波演化"，发表于2014年9月2-5日德国柏林国际电机会议（ICEM），doi: 10.1109/ICELMACH.2014.6960441 3. V. Climente-Alarcon, J. A. Antonino-Daviu, E.G. Strangas, M. Riera-Guasp, "感应电机转子导条断裂机理与预后分析"，发表于IEEE Transactions on Industrial Electronics，2015年3月，第62卷第3期，页码1814-1825，doi: 10.1109/TIE.2014.2336604 4. V. Climente-Alarcon, D. Nair, R. Sundaria, J. A. Antonino-Daviu, Antero Arkkio, "受损转子笼暂态效应仿真组合模型"，发表于IEEE Transactions on Industry Applications，2017年7-8月，第53卷第4期，页码3528-3537，doi: 10.1109/TIA.2017.2691001 5. V. Climente-Alarcon, A. Arkkio, J. Antonino-Daviu, "电机转子笼疲劳试验中的热应力研究"，发表于International Journal of Fatigue，2019年3月，第120卷，页码56-64，doi: 10.1016/j.ijfatigue.2018.11.003