The invention relates to an
alternating current servomotor control circuit for an electronic
planet selvage device. In the prior art, a motor difficultly rotates at a high speed in the control process. The
control circuit comprises a master control
chip STC89C58RD+, a key input circuit, a
nixie tube status display circuit, an external release button and sensor
signal input circuit, a selvage control status indicator lamp and alarm output circuit, a spindle
encoder signal receiving circuit and a
system power circuit, wherein the master control
chip directly acquires spindle
encoder signals through the spindle
encoder signal receiving circuit; the external release button and sensor signal input circuit adopts
optical coupling isolation; and
alternating current input into the
system power circuit is subjected to bridge rectification and is subjected to
voltage stabilization by a three-
terminal voltage stabilizing module and a switch integration
voltage stabilizing module. The circuit hasa simple structure, man-
machine communication is convenient, the electronic
planet selvage device is operated and controlled flexibly, and the electronic
planet selvage device is accurately synchronous with a spindle when the spindle rotates at a high speed.