Method and device for controlling the acceleration of an electri

Details Method and device for controlling the acceleration of an electri Method and device for controlling the acceleration of an electri

1986-03-21

1987-08-04

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

046848657

ABSTRACT:
In order to attain the maximum permissible speed of a stepping motor and to achieve a substantial reduction in the time required to perform a predetermined number of steps, acceleration between the starting speed V.sub.o and the maximum speed V.sub.m takes place in the form of incremental increases .DELTA.V.sub.n in the frequency of the signal for controlling the speed of the motor at time intervals .DELTA.t which are all equal. All the speeds V.sub.n-1 +.DELTA.V.sub.n are precomputed by a microprocessor and the precomputed values are stored in memory. These values are read at each instant t+.DELTA.t during the acceleration period and in the reverse order with respect to the deceleration period. The curve velocity V is a function of time t is of exponential form with a negative exponent.

REFERENCES:
patent: 3986094 (1976-10-01), Quioque et al.
patent: 4268783 (1981-05-01), Murray
patent: 4277731 (1981-07-01), Pongracz
patent: 4489260 (1984-12-01), Matsushita
patent: 4496891 (1985-01-01), Kobayashi
European Search Report, Appln. No. 0116677 (EP No. 83 10 6383) Apr. 27, 1984, The Hague.
IEEE 1982 Iecon Proceedings, 15-19 Nov. 1982, Palo Alto, CA. pp. 84-89, IEEE, New York, U.S. M. F. Rahman et al.
"Acceleration-Deceleration Capabilities of V.R. Type Steppers and Their High Performance Control Strategies on a Microprocessor Based CNC Controller".

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