Browsing by Author "Schreiber Richard"
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- ItemAn automatic measurement, testing and diagnostic system for induction motors(IEEE, 2015-01-01) Schreiber Richard; Fuchs Petr; Jaksch Ivan
- ItemThe analysis of induction motor electromagnetic field and shaft revolution oscillations at dynamic rotor faults(IEEE, 2015-01-01) Jaksch Ivan; Schreiber Richard; Fuchs Petr
- ItemBrightness Matching Experiments With Pulsed Light: Experiment Design(Institute of Electrical and Electronics Engineers, 2021-01-01) Kukačka Leoš; Mach Ondřej; Schreiber Richard; Chmelařová Michaela; Florianová Lucie; Mazač Martin; Dupuis Pascal
- ItemFrequency response of selected current transformes and hall-effect current sensors(IMEKO-International Measurement Federation Secretariat, 2015-01-01) Schreiber Richard; Sikorová Iveta
- ItemImproved method for precise shaft angle oscillation and angular velocity measurement: (With simultaneous sampling of other analog signals using NI DAQ Cards)(2017-01-01) Schreiber RichardThis paper deals with the possibilities of simultaneous sampling of analog data acquired by sigma/delta converters (used on NI DSA cards) and the ways of synchronization with angular velocity and position values measured by IRC sensors. In the past, a measurement system with two 8 channel DSA cards was developed. This system has provided to be reliable. However, the accuracy of the shaft angle measurements was to be found of lower accuracy, but still considered adequate for the purpose of induction motor fault diagnostics. The angular position is measured with the use of an IRC sensor, where the actual absolute angle is sampled synchronously with all other channels with sampling frequency in the order of tens of kilosamples per second. During more advanced experiments, the currently used method had shown limitations (lower resolution, problems with velocity calculation). To solve this problem, a new improved method, based on a combination of commonly known angular position and velocity measurement, is proposed. The performance is evaluated by simulations. Some common methods for precise measurements of angular velocity and angular speed oscillations are briefly described, along with their advantages and disadvantages. The simulation results of the proposed method are compared with the method currently used. The possible implementation of the proposed new measurement method with the use of the existing hardware is discussed.
- ItemInduction motor vibration diagnostics with the use of stator current analysis(IEEE, 2016-01-01) Schreiber Richard
- ItemSupraharmonic Voltage Distortion Analysis in the Range up to 9 kHz and 150 kHz(2018-01-01) Kukačka Leoš; Schreiber Richard; Bedrník Tomáš; Guillherme Pedro Luis; Chazoule Thomas
- ItemThe application of various current-sensing devices for induction motor fault diagnostics(IEEE, 2016-01-01) Jaksch Ivan; Fuchs Petr; Schreiber Richard