High-Harmonic Injection-Based Brushless Wound Field Synchronous Machine Topology

Brushless Wound-Rotor [Synchronous] Doubly-Fed Electric Machine By Real-time Control

Experts theorized that a Brushless Wound-rotor [Synchronous] Doubly-fed Electric Machine System (BWRSDF), which can symmetrically motor or generate with variable speed, provides higher efficiency, higher power density, higher torque density, and lower cost than any other electric machine system, including the permanent magnet electric machine system, but only with the discovery of a practical b...

Control of Wound Field Synchronous Machine Gensets for Operation in a CERTS Microgrid

High-Quality Speech Modification Based on Pitch- Synchronous Harmonic and Non-harmonic Modeling of Speech

In this paper, we propose a high-quality speech modification method based on pitch-synchronous harmonic and non-harmonic modeling of speech. In the proposed method, the harmonic and non-harmonic parts of speech are modeled by the sum of sinusoids with frequencies corresponding to pitch multiples and with randomized frequencies, respectively. Then, harmonic and nonharmonic parts are synthesized ...

Performance Description of Brushless Doubly-Fed Induction Machine in Its Asynchronous and Variable Speed Synchronous Modes

Brushless Doubly-Fed Machine has attracted considerable attention in recent years due to its advantages. It has the robustness of the squirrel cage induction machine, and the speed and power factor controllability of the synchronous machine as well as the absence of brushes and slip rings, and using a fractionally rated frequency converter. Hence, there are considerable benefits over the conven...

Dynamic Performance Analysis of High-Frequency Signal Injection Based Sensorless Methods for Interior Permanent Magnet Synchronous Motors

This paper focuses on three commonly used sensorless methods based on high-frequency signal injection; namely, the rotating sinusoidal injection in the stationary reference frame, the pulsating sinusoidal injection in the estimated synchronous reference frame, and the pulsating square wave injection in the estimated synchronous reference frame. Although these methods have found applications in ...