en Synchronous Machines Synchronous Machines Research Paper Research Paper <div style="text-align: justify;"><span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="color:#000000;">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 <em>X_D</em>/<em>X_Q</em> ratio can be amplified and hence its output by the tuning of the variable capacitance bank which capacitive reactance <em>X_C</em> neutralizes only the quadrature axis reactance <em>X_Q</em> while the direct axis reactance <em>X_D</em> remains unaffected. It is shown that at<em> X_D</em>/<em>X_Q</em> = 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.</span></span></span></div> Capacitive Reactance XC, Primary and Secondary Windings, Variable Capacitor Bank, XD/XQ Ratio. 2251 2251 http://ijeee.iust.ac.ir/browse.php?a_code=A-10-3977-1&slc_lang=en&sid=1 E. O. Agbachi euokenna@futminna.edu.ng 1800319475328460010260 1800319475328460010260 No Department of Electrical and Electronics Engineering, Federal University of Technology, Minna, Niger State, Nigeria. L. U. Anih Linus.anih@unn.edu.ng 1800319475328460010261 1800319475328460010261 Yes Department of Electrical Engineering, University of Nigeria, Nsukka, Enugu State Nigeria, Nigeria. E. S. Obe simon.obe@unn.edu.ng 1800319475328460010262 1800319475328460010262 No Department of Electrical Engineering, University of Nigeria, Nsukka, Enugu State Nigeria, Nigeria.