engleski

Black box for electrical machines

A key issue in the operation of all machines is the proper and reliable work, which in economic terms is a maximum financial benefit and staying within technical constraints. Moreover, the capital investment required for equipment often necessitates high levels of availability to ensure a reasonable rate of return. Thus, the minimization of operational costs resulting from unplanned downtimes, unnecessary maintenance and a reduction of the system capabilities has become a core objective of industry. The detection of machine fault conditions is of great significance. With the appropriate machine monitoring and fault detection system early warning signs can be obtained for preventive maintenance, improved safety, and improved reliability of electrical machines. Faults can produce machine shutdown, economic and time losses, and even human casualties. Early, fast and accurate detection and diagnosis of fault conditions is critical in preventing major damage. In order to enable better asset management and also to protect capital investment we have developed monitoring system called “Electrical Machines Black Box” (EMBB). Black Box is a common name for a device that records all key information of the object that is monitored. In the case of fault or failure recorded information can be used to determine the cause of fault or failure. Therefore, the device was named Black Box in order to be recognizable to the users. The purpose of the EMBB system is dual. Once, EMBB is used to determine the cause of failure. For electric machine manufacturers this is crucial, especially within the warranty period of machine usage. In the case of reclamation, with EMBB system it can be easily determined whether the machine was operating outside of the parameters determined by contract. In such cases the manufacturer could refuse the request for the reclamation. Another important purpose of EMBB system is to enable users of electrical machines insights into all harmful and fault conditions during machine operation, recorded by EMBB system. By reviewing all recorded data the machine users can conclude that some operating procedures are wrong or that certain part of the system are failing during operation. Based on those findings machine users could made corrective measures which would greatly contribute to the reliability and availability of the entire system. Conventional monitoring systems for rotating machines are based on the vibration measurement and they are not designed to detect and to identify the above mentioned harmful machine conditions. Their purpose is to record measuring data and to alarm user when measured value reaches preset value. It can be concluded that the system EMBB provides insight into the conditions that conventional monitoring systems are not monitoring and thus allows different and in certain cases improved asset management.

Synchronous generator; black box for electrical machines; harmful working conditions; fault detection

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