| 摘要 |
PURPOSE:To maintain armature currents in the form of sine waves, and to reduce vibrations and noises by limiting a current command value in response to an input to an integrator. CONSTITUTION:An input to a integrator (b) is subject to the influence of the saturation of a drive circuit for a motor when the drive circuit is saturated, and the input to the integrator (b) is slight when the drive circuit is not saturated. The input to the integrator (b) is applied to a function generator (e) responding to the variation of the input to the integrator, aiming at the variation of the input to the integrator. An output signal from the function generator (e) is transmitted over a current limiting circuit (h) through an absolute value circuit f and polarity clamps g1, g2, and a current command value is reduced. That is, a saturating current command is changed continuously by an output from the function generator (e), and an output signal from the drive circuit, armature currents, are maintained in the form of sine waves. |
