@inproceedings{WittmannHagl2016, author = {Wittmann, Josef and Hagl, Rainer}, title = {Gleichlaufschwankungen in Servoantrieben}, series = {Fortschritte in der Antriebs- und Automatisierungstechnik (FAA), Stuttgart}, booktitle = {Fortschritte in der Antriebs- und Automatisierungstechnik (FAA), Stuttgart}, year = {2016}, language = {de} } @inproceedings{WittmannHaglKennel2016, author = {Wittmann, Josef and Hagl, Rainer and Kennel, Ralph}, title = {Influence of Position Measuring Errors on Speed Ripple in Servo Drives}, series = {2016 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM, Capri, Italy}, booktitle = {2016 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM, Capri, Italy}, year = {2016}, abstract = {Position measuring devices with sinusoidal measuring signals are widely used in position-controlled servo drives in industrial automation, e.g., for machine tools or semiconductor production machines. Usually, the feedback signal for the speed or velocity controller is calculated from the measured position. Therefore, position measuring errors affect these control loops. This study presents an analytic error model that considers non-ideal sinusoidal measuring signals with basic deviations (amplitude differences, offset errors, and phase shift) as well as signal harmonics. The model was used to systematically investigate the influence of signal quality and the number of signal periods from position measuring devices on speed ripple, across a wide range of speeds. A test stand with a high-resolution reference angle measuring device was used to confirm the results.}, language = {en} } @inproceedings{WittmannHaglKennel2017, author = {Wittmann, Josef and Hagl, Rainer and Kennel, Ralph}, title = {Hybrid Current and Acceleration Control of Servo Drives}, series = {PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, N{\"u}rnberg}, booktitle = {PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, N{\"u}rnberg}, year = {2017}, abstract = {A hybrid current and acceleration control is presented and shown to improve the load disturbance behavior of servo drives significantly without additional sensor effort. The feedback signal of the acceleration control loop is calculated from the position data of the motor encoder. Hence, position measuring errors influence this control loop and lead to speed ripple. Therefore, the presented design of the acceleration control loop considers both load sensitivity and position measuring errors.}, language = {en} } @article{WittmannHagl2016, author = {Wittmann, Josef and Hagl, Rainer}, title = {Positionsmessfehler in Servoantrieben}, series = {Antriebstechnik}, volume = {2016}, journal = {Antriebstechnik}, number = {1-2}, year = {2016}, language = {de} } @techreport{AuerBenekenBrummeretal.2017, author = {Auer, Veronika and Beneken, Gerd and Brummer, Benjamin and Ch{\^a}teauvieux-Hellwig, Camille and Engler, Benjamin and Gilly, Alexander and Hagl, Rainer and Hummel, Felix and Hummel, Sabine and Karlinger, Peter and Knorr, Ludwig and K{\"o}ster, Heinrich and Kucich, Martin and Mecking, Simon and Rabold, Andreas and Sandor, Viktor and Schalk, Daniel and Schanda, Ulrich and Schemme, Michael and Schiffner, Ivonne and Schmidt, Jochen and Schugmann, Reinhard and Seidlmeier, Heinrich and Sigg, Ferdinand and Stauss, Kilian and Sussmann, Monika and Wellisch, Ulrich and Wenninger, Marc and Wittmann, Josef and Zscheile, Matthias}, title = {Jahresbericht 2016, Forschung - Entwicklung - Innovation}, organization = {Hochschule Rosenheim}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:861-opus4-12282}, pages = {68}, year = {2017}, abstract = {Mit dem j{\"a}hrlich erscheinenden Forschungsbericht m{\"o}chte die Hochschule Rosenheim einen Einblick in ihre vielf{\"a}ltigen Projekte und Aktivit{\"a}ten der angewandten Forschung und Entwicklung geben. Im Jahresbericht 2016 wird {\"u}ber Vorhaben im Jahr 2016 berichtet.}, language = {de} } @phdthesis{Wittmann2019, author = {Wittmann, Josef}, title = {Beschleunigungsregelung von Servoantrieben basierend auf Positionsmesswerten}, school = {Technische Hochschule Rosenheim}, pages = {231}, year = {2019}, abstract = {In der vorliegenden Arbeit wird der Einfluss einer Beschleunigungsregelung auf das Regelverhalten von Servoantrieben untersucht. Auf einen Beschleunigungssensor wird verzichtet. Die Istbeschleunigung wird aus dem Positionsmesswert berechnet. Anhand eines verifizierten Modells f{\"u}r Positionsmessfehler wird der Einfluss der Positionsaufl{\"o}sung und der Messsignalqualit{\"a}t auf die berechnete Beschleunigung dargestellt. Basierend auf diesen Ergebnissen wird das Konzept einer kombinierten Strom- und Beschleunigungsregelung entwickelt und dessen Funktionalit{\"a}t nachgewiesen.}, language = {de} } @inproceedings{StubenrauchWittmannKiermayeretal.2017, author = {Stubenrauch, Franz and Wittmann, Josef and Kiermayer, Alexander and Seliger, Norbert and Hagl, Rainer and Schmitt-Landsiedel, Doris and Kennel, Ralph}, title = {FPGA-based High Dynamic Servo Drive Control with a 200kHz Gallium Nitride Inverter}, series = {2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), Warsaw, Poland}, booktitle = {2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), Warsaw, Poland}, year = {2017}, abstract = {Increased productivity in industrial processes can be achieved by dynamic and accurate positioning of servo drives. Therefore, improvement of servo drive dynamics using latest technologies in the key components such as inverter, control system and position measuring device are investigated. Using Gallium Nitride (GaN) or Silicon Carbide (SiC) semiconductors for motor inverters enables energy efficient operation up to pulse width modulation (PWM) frequencies of 500 kHz. This allows motor filters with small component sizes. As a result, high motor efficiency, low torque ripple, high control bandwidth and almost ideal sinusoidal output voltages are achieved. Experiments on a 200 kHz Gallium Nitride inverter with sine wave motor filter show a current control loop bandwidth of 3.2 kHz and almost ideal sinusoidal phase voltages. The achieved bandwidths of the speed and position control loops are 318 Hz and 106 Hz, respectively.}, language = {en} }