Damping device of rotor

Abstract

Abstract PURPOSE:To reduce the converging time to stop a rotor, by driving a locking device synchronously with the stoppage of the rotor and by a stopping circuit that stops the rotor at a desired position and then giving an effect of the drive of the locking device to a locking board stuck to a rotary shaft. CONSTITUTION:A locking board 16 having the locking grooves distributed equidistantly in the number equivalent to the repetitive frequency of the basic step is stuck to a rotary shaft 15 of a stepping motor 11 which functions as a rotor. A locking member 17 is pivotally attached to a horizontal part 18a of a rocking lever 18 at four areas on the outer circumference of the board 16, and the lever 18 is mounted to a locking device 21 connected to a motor 11. The vertical part 18c of the device 21 is set opposedly to the absorbing part of an electromagnet 22. The energizing coils S1 and S4 of the motor 11 are drived in turn by transistors TRT1-T4 to turn in steps and make a TR5 conduct synchronously with the TR that is made to conduct last when these coils come to the prescribed positions. Thus coils S5-S8 of the magnet 22 are energized. The magnet 22 absorbs an absorbing plate 18d and turns the lever 18 clockwise to hook the member 17 to the board 16. Thus the rotor 11 is stopped.

Inventors

• 👤 Shinji Tsutsumi
• 👤 Yoshimitsu Nagashima

Bibliographic Details