The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper a method to consider saturation behavior of induction machines during the finite element (FE) analysis of high frequency excitations is developed. This saturation behavior manifests itself in an additional saturation and intermodulation harmonic, when evaluating the current response related to a high frequency voltage excitation. In order to correctly reproduce these harmonics within...
The paper investigates the influence of pole-pair number on the mixed eccentricity related fault indicators extracted by means of high-frequency or transient signal injection. The method exploits the transient current response to track eccentricity- and slotting-related machine saliencies. By using the fault indicator's locus, a separation of mixed eccentricity components is performed, without comparison...
The paper analyzes the transient reaction of squirrel cage induction machines to voltage step excitation. The involved excitation technique uses the drive's inverter to excite the machine with voltage steps. The transient nature of these steps demands high flux linkage derivatives. In response, the squirrel cage acts as a barrier hindering the flux to penetrate the rotor yoke and forcing it into the...
This paper investigates the feasibility of sensorless position estimation from PWM-induced transient excitation sequences, present during inverter-driven operation of induction machines (IM) with standard space vector PWM (SVPWM). The applied method exploits existing machine saliencies and their correlation to the current slopes measured in response to a voltage pulse at the machine terminals. Determination...
The paper analyses the influence of induction machine (IM) design on rotor slotting harmonics used for sensorless control strategies. These harmonics have a direct impact on flux and rotor position estimation accuracy. Therefore prediction of their magnitude helps in selecting suitable machine designs with regard to stator/rotor slotting and winding configuration. The paper at hand focuses on the...
Sensorless field oriented control (FOC) strategies have found their place in industry applications during the last few years. Stimulated by this development scientific research continues to improve their performance, which is directly linked to the estimation accuracy of flux and rotor position without a mechanical sensor by means of high frequency or transient excitation. The influence of induction...
A new fault detection method for induction machines (IM) is analyzed with respect to transient magnetic material behavior by means of finite element (FE) modeling. The detection method uses the machines inverter to excite the IM with transient voltage pulses and measures the corresponding phase current responses. To account for the material behavior transient BH curves are identified from measurements...
Usage of sustainable energy is a key factor for solving future climate issues. The purpose of the project SustEner is to modernize Sustainable Electrical Energy vocational training by enhancing existing or establishing new training methods in enterprises and education. This paper presents the SustEner module power management techniques in hybrid electrical cars.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.