E. O. Agbachi, L. U. Anih, E. S. Obe,
Volume 18, Issue 1 (3-2022)
Abstract
The paper presents the steady-state analysis of a new hybrid synchronous machine with a higher reluctance to excitation power ratio. The machine comprises a round rotor and a salient-pole machine elements that are mechanically coupled together and integrally wound. In each stator, there are two sets of identical poly-phase windings identifiable as the primary and secondary windings which are electrically isolated but magnetically coupled. The primary windings are connected in series between the two sections of the hybrid machine while the secondary windings are connected in anti-series and terminated across a balanced capacitor bank. The hybrid machine exhibits a special feature that when running at the synchronous speed, its effective XD/XQ ratio can be amplified and hence its output by the tuning of the variable capacitance bank which capacitive reactance XC neutralizes only the quadrature axis reactance XQ while the direct axis reactance XD remains unaffected. It is shown that at XD/XQ = 3, the reluctance component of the output power is 2.5 times the excitation power. The calculated and the measured results from the machine are in good conformity.
Phd Mohammad Abshari, Mansour Rafiee,
Volume 22, Issue 2 (3-2026)
Abstract
The present study aims to design, analyze, and simulate the synchronous reluctance motor (SynRM) based on the IEC90L frame and IE4 efficiency class. Initially, the permissible losses are calculated for the SynRM considering the given efficiency class. The SynRM is then designed using the calculated losses to generate the highest possible output power. In order to achieve optimal performance in terms of output power and power factor (PF), a parametric per-unit system is utilized for SynRM analysis, and the dimensions of various parts of the motor are determined based on design inputs (copper losses and magnetic loading). Subsequently, given this parametric model and the changing range of per-unit parameters, the characteristics of the available motors are thoroughly monitored with respect to output parameters, and the motor model is selected. To validate the analytical model, the finite element analysis (FEA) is conducted for the selected model, and the simulation results are compared with those of the analysis method and design inputs. Ultimately, to enhance overall motor performance, an optimization process was conducted, followed by a comprehensive evaluation of the optimized model to assess efficiency and torque improvements.
