| 摘要 |
<p>PURPOSE:To prevent the generation of abnormality in field factor by forming a current pattern for field current control based on a limiter by an armature current. CONSTITUTION:The armature current Ia in an armature circuit 7 is based on the output in an armature current pattern generating section 1 and constant current control is performed by a round closed loop consisting of an armature current deviation detecting section 2, an armature current control section 5, a main rectifier unit 6 and an armature current detecting section 4. The output in the armature current pattern generating section 1 is inputted to a field current pattern limiter 12. The field current pattern limiter 12 is compared with the armature current pattern and the detecting signal (actual current) from the armature current detecting section 4 to output the value at low degree side. A field current pattern generating section 3 multiplies the output in the field current pattern limiter 12 by a predetermined coefficient and a pattern to obtain a necessary field factor will be generated. By this method, constant current control is also maintained for the field current.</p> |
