| 摘要 |
PURPOSE:To stably control both a bearing operation and a motor or a generator by individually controlling the exciting current component of the primary current and the secondary current component. CONSTITUTION:The secondary current component instruction value I*2 obtained through an amplifier 13 from a deviation between a set speed value omegar and an actual speed omegam, and an exciting current component instruction value I*0 of the output of a gap length controller B are inputted to calculators 27, 28, 29 in a current reference generator D. The calculator 27 calculates the primary current amplitude command value I*1, the calculator 28 calculates a phase angle theta, the calculator 29 calculates a slip frequency omegas, and the slip frequency omegas is varied to the slip phase angle thetas through an integrator 30. A sinusoidal wave generator 33 outputs the primary current command values I*U1, I*V1, I*W1 as sinusoidal waves of 3-phase of the amplitude proportional to the primary current amplitude command value I*1 in frequency proportional to the rotary phase angle theta*1. |
