POWER CONVERSION DEVICE, ROTATING MACHINE SYSTEM, AND DIAGNOSIS METHOD

• Main Authors: MAKI KOJI, OHASHI TAKANORI, NAKAMURA ATSUHIKO, IWAJI YOSHITAKA
• Format: Patent
• Language: Chinese; English
• Published: 27.08.2021
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

This power conversion device has: a current measurement unit for measuring phase current; a current vector calculation unit for calculating a current vector by performing 3-phase to 2-phase conversion on the phase current; an amount-to-be-analyzed calculation unit for calculating, on the basis of the current veactor, an amount to be analyzed; and a feature amount waveform extraction unit for extracting a waveform in a specific frequency range on the basis of the amount to be analyzed. 本发明提供一种电力转换装置、旋转机系统以及诊断方法。电力转换装置具有：电流测量部，其测量相电流；电流矢量计算部，其对相电流执行三相二相转换来计算电流矢量；分析对象量计算部，其基于电流矢量计算分析对象量；以及特征量波形提取部，其基于分析对象量来提取特定频率范围的波形。