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.
The traction converter consists of a single-phase AC-DC rectifier and a three-phase DC-AC inverter. Due to special structural characteristics of single phase rectifier, a fluctuating voltage component with the frequency twice of the grid's, exists in DC-link voltage. Fed by fluctuating DC-link voltage, a beat phenomenon occurs in traction motor, and harmonic components appear in both stator current...
The characteristic of linear induction motor (LIM) are quite different from the rotary induction motor (RIM) due to the end effects and so on. The conventional high performance control scheme like indirect field oriented control (IFOC) cannot be directly adopted for LIM drives. In this paper, the traction characteristic of the LIM and RIM are compared from different perspectives. The performance of...
In sensorless induction motor drives, the stator model is always used to estimate the stator flux because it does not require a speed signal. Combined with the stator model, stator field orientation control strategies are preferred in implementation. In these strategies, direct torque and flux control based on space-vector modulation (SVM-DTC) is the one with good performance. It produces fast torque...
In this paper, mathematic model of linear induction motor (LIM) is developed considering the influences of end effects. A full speed range direct thrust control (DTC) scheme for LIM is proposed considering the parameters dynamic variation and characteristic of railway traction application. In low speed range, an improved indirect stator-quantities control (ISC) with circular flux track is applied...
This paper presents a decoupling method for speed-sensorless vector control of induction motor to track the flux command fast and eliminate torque ripples in flux-varying environment, such as field-weakening operation and efficiency optimization. Rotor flux-oriented control can decouple the speed and flux control. However, the decoupling is on the condition of a constant rotor flux. When motor drives...
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.