Vladimir M Shlain

US Patent:

47148675, Dec 22, 1987

Filed:

Sep 30, 1986

Appl. No.:

6/913537

Inventors:

Simyon Palmin - Sharon MA
Vladimir Shlain - Brookline MA

Assignee:

Design Components Incorporated - Franklin MA

International Classification:

H02P 800

US Classification:

318696

Abstract:

A stepper motor is accelerated and decelerated with a parabolic velocity profile to efficiently utilize the available torque of the motor. The times between pulses to obtain a parabolic velocity profile are determined by a microprocessor-based stepper motor controller from desired values of start/stop velocity, maximum velocity and time to reach maximum velocity. The required times are stored in a random access memory and are used to supply to the motor a pulse train which follows the parabolic velocity profile during acceleration and deceleration. The controller is easily programmable to accommodate different motor characteristics, different applications and different operating parameters.