Architecture

Test power supplies

These test power supplies are provided as kits containing switchgear control resources, power switching devices, the step-up transformer and other components.

Parameters of test power supplies:

  • Umax = 10 kV
  • Smax = 1.5 MVA
  • F max = 400 Hz
  • THD < 2 %
  • Independent control of U, I, f
  • Built-in functions U ramp, I ramp, frequency ramp
  • Electronic protection
  • Output transformer to change the voltage levels

Transducers for measuring electrical quantities

Voltage and current transducers provide oscilloscope data at a sampling rate of tens to hundreds of kHz.

Isolation barriers for safe separation of the product tested by the measurement system.

Transducers for the measurement of non-electrical quantities.

Transducers include temperature sensors, torque sensors, vibration sensors, microphones, thermal imagers. The measuring system records the test signals in the form of sampled data with a sampling frequency of up to tens of kHz, and performs subsequent processing.

Measurement and Control System

The measurement and control system is based on the hardware and software from National Instruments. The control functions are implemented using the Compact RIO, measurement functions using the multifunction measuring cards, data analysis and control graphical user interface is implemented using a powerful industrial PC. Software for managing, measuring and processing of data is developed in LabVIEW from National Instruments.

Datalogging

During measuring a record is kept of all measured data in raw form in TDMS format. The stored data is then processed by applications for the evaluation of testing engines that combine data, perform calculations, compare with selected standards and generates an output protocol. Data TDMS format is readable by a commercial reader that is part of the universal data management and processing DIADEM from National Instruments.

Postprocessing data

Software testing equipment includes applications for processing the raw measurement data. The application allows presetting of data processing including the choice of standards according to which the processing takes place. In addition to the standard built-in signal processing such as determining the efficiency of an engine, it is possible to perform their own analysis aimed at identifying specific phenomenon. An example would be the detection of fast power oscillations with time resolution of only a few periods of the motor power supply.

Configuration circuits (docking)

Configuration circuits consist of a matrix of contactors which allow mutual switching sources, measuring instruments and test engines in manual or automatic mode for selected tests. These circuits can be dimensioned up to 15 kV and 10 kA.

Test bench

Test benches for the location and positioning of the engine under test and load factor by axial height are produced as solid welded frames with mounting plates provided with dovetail grooves. Movements in the vertical direction can be controlled electrically.

Load factor

Loading of the test engine is done through a combination of electrical load machines and frequency convertors. In synchronous generators set inductors are used as the load factor or active load in the form of a frequency converter supplying reactive power.

 

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