Title: System for controlling speed and phase
Application Number: 85101789 Application Date: 1985.04.01
Publication Number: 1006791 Publication Date: 1987.01.10
Approval Pub. Date: Granted Pub. Date: 1987.10.21
International Classifi-cation: G05D13/62,H02P5/16
Applicant(s) Name: Hitachi Ltd. Address:
Inventor(s) Name:
Attorney & Agent: LI XIANCHUN YE KAIDONG
Abstract:
     An electric machine is used to drive a motion mechanism installation. The speed of the motion mechanism reaches the initially-set value, under the control of a speed control system. A phase control system is used for the phase synchronization of the motion mechanism's reference signal. The error correcting device, stored with target value, compares the actual value of speed and phase of the motion mechamism with the target value, detects the error between them and corrects the initially-set value in reference to the error. In order that the speed and phase of motion mechanism reach the target value, when the speed of the motion mechanism is very near to the target value, the speed control system is off, meanwhile the phase control system puts into operation.
Time: 6