| 摘要 |
FIELD: constant- and variable-frequency ac supply systems. ^ SUBSTANCE: proposed ac generator protective device has measuring component, final element, two threshold elements, ac voltage regulator, and frequency measuring element; measuring component is made in the form of auxiliary winding placed in same slots as stator inducing winding, number of pole pairs of auxiliary winding being greater by odd number of times than that of inducing winding; input of frequency measuring element is connected to measuring component through ac voltage regulator; input of first threshold element is connected to measuring component; input of second threshold element is connected to output of frequency measuring element; outputs of both threshold elements are connected to final element coil. ^ EFFECT: enlarged functional capabilities of protective device. ^ 1 cl, 3 dwg |
