To automatically perform Reliability and Life Test on Electric Motors, e.d.c. proposes system TAC320/WM.
The system can manage up to 32 stations. In each station it is possible to run an independent test cycle, different to the test cycles running on other stations. Each station can be connected to the appropriate sensors to acquire the desired measurements; (voltage, current, power, temperatures, vibrations, torque, RPM, analogic/digital signals, ...).
Of particular relevance, it’s the possibility of coupling the motor under test with a braking device. In this case it will be possible during the test cycle to program the desired Torque (or RPM) value in the different phases, acquiring the corresponding RPM value (Torque).
A typical test comprises of a sequence of phases that are repeated a programmable number of times. In each phase it is possible to set checks on the acquired measurements which activate alarms or bring the test cycle to an end.
The test result system is very efficient and allows the storing of all the test results or just the test results associated with the last N cycles before the end or before an interruption due to an alarm.
The system includes an Industrial PC with WINDOWS10 Operating system for the real time management of the tests. The test results are transferred to a second remote PC where it is possible to analyse and print the results of past tests or the partial results of actual running tests. The test results format is compatible with EXCEL.
A real innovative function that can be inserted into the system is the following: at defined steps of the life test, for example each 200/500 hours, it’s possible to suspend the life test and perform the Partial Discharges Measurement – using a LT400 System Winding Analyser - on the motors under test. The test to be performed is the PDIV (Partial Discharge Inception Voltage) measurement, acquiring the value of the inception voltage of the partial discharges. It’s suggested to perform the measurement both among the windings and between the windings to ground of the motor under test. If the PDIV value acquired is lower to the value acquired in the previous step, it means that the motor under test is subject to a permanent degradation of the insulation quality. This information is really important because allows the evaluation of the duration of a product, therefore of its quality, long before that happens a break and therefore to evaluate the materials and process used in this product.