Controller for stopping in place for main shaft

Abstract

Abstract PURPOSE: To stop the shaft in place, by controlling so that the output dividing the motor speed by the amount of revolution according to the position deviation is constant. CONSTITUTION: The trigger angle of SCR3d is controlled 3C according to the voltage of the deviation 3a between the reference speed CV and the actual speed AV to keep CV=AV. Next, the constant position stop reference ORCM is input to the circuit 11b to decrease CV and AV, the signal VZR is generated 11a when AV is at the specified speed to switch 11b the switch 12 for position control. The initial set voltage is generated with VZR and AV makes constant speed revolution. When a magnet 10a comes to a given position, a coarse position deviation signal is produced 11a, and when the shaft further turns to be near the area, a bias signal is produced 11a, an accurate deviation signal DV 2 is oupput when it reaches the area, and it opposes to the saturated reactor at the middle of the magnet 10a with DV 2 zero and it stops at the constant position. When the shaft in revolution V requires an angle θ to the position deviation of zero, if control is made so that V/θ is constant independently of the shaft speed, the time for constant position control especially at low geared position can be reduced. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Yoshitoku Kozai
• 👤 Yoshimoto Fujioka
• 👤 Naoto Oota

Bibliographic Details