| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a field control apparatus by which a field voltage is corrected smoothly in a synchronous speedup. SOLUTION: A function generator 50 computes a field voltage adjustment value according to a function which is decided in advance according to a rotation speed from a rotation-speed detector 28 which detects a signal to be input via an electromagnetic pickup 30. A function generator 51 computes a field current control reference according to a function which is decided in advance according to the rotation speed from the rotation speed detector 28. A function generator 53 computes a field current correction which is decided in advance according to the deviation between the field current control reference value and a field current detection. An adder 54 adds the field current correction to the field voltage adjustment value, and a field voltage setting value is obtained so as to be output to an adder 18.</p> |
