Servomotor control system

Details Servomotor control system Servomotor control system

1984-07-23

1986-02-25

Shoop, Jr., William M.

Electricity: motive power systems

Synchronous motor systems

Armature winding circuits

318722, 318345B, 318345AB, H02P 528

Patent

active

045730024

ABSTRACT:
A servomotor control system includes a sensor for sensing the velocity of a servomotor (101), a sensor for sensing an actual current flowing into the servomotor (101), a power drive circuit for driving the servomotor (101), and control units (MP1, MP2). The control unit MP1 performs a velocity loop computation to derive a current command for the servomotor based on an offset velocity between a velocity command for the servomotor and the sensed actual velocity. The control unit MP2 performs a current loop computation to obtain a command for the power drive circuit. In the current loop computation of the control unit MP2 a velocity compensation signal is obtained by amplifying the sensed actual velocity by a predetermined magnification, so that the command for the power drive circuit is compensated by the velocity compensation signal. The velocity loop computation is executed at a period longer than that at which the current loop computation is executed.

REFERENCES:
patent: 3916279 (1975-10-01), Kawano
patent: 4240020 (1980-12-01), Okuyama
patent: 4276505 (1981-06-01), Bose
patent: 4358722 (1982-11-01), Iwakane

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