KUC755AE106 3BHB005243R0106 ABB [caption id="attachment_1499" align="aligncenter" width="600"] KUC755AE106[/caption] When KUC755AE106 3BHB005243R0106 synchronous motor starts, the frequency of rotor induced voltage gradually decreases with the rise of speed. Once the synchronous motor starts, the single chip microcomputer will immediately detect the rotor induced half cycle time, starting from 20ms, the digital tube is marked "9",