| 摘要 |
PURPOSE:To prevent the fluctuation of the terminal voltage and power factor caused by the load fluctuation, by providing a vector computing element to output the field current command and phase command from the armature current, power factor angle command and no-load terminal voltage command. CONSTITUTION:A phase differential angle operating table 201 finds a phase differential angle theta from the armature current Ia and no-load terminal voltage VO, while a terminal voltage computing element 202 finds the terminal voltage V from a phase differential angle theta and the no-load terminal voltage VO. Then, the field current command lfp is found from a no-load saturation curve table 203, a d-axis component magnetizing current computing element 204 a q-axis armature reaction voltage computing element 205 and a field current computing element 206. The phase command beta of a power converter is found by adding a commutation overlap angle signal U/2 from a computation overlap angle computing element 208, a power factor angle phi and a phase differential angle theta. |
