JPS5450810A - Direct current motor controller - Google Patents

Abstract

PURPOSE: To perform a stable field weakening control by using a lower level priority circuit at an armature current pattern and a field current pattern circuit an by performing a control of an armature current and a field current in reference with a speed deviation and an armature voltage.

CONSTITUTION: A speed deviation vs. an armature current instruction post NA making an armature current instruction from a speed deviation V and a field current vs. an armature current instruction post FA instructing an armature current so as to be a predetermined minimum field rate corresponding with a field current are provided on an armature current controlling system and a lower level one among instruction values from these both instruction posts is given a priority at a lower level priority post AL to be an armature current instruction. A speed deviation vs. a field current instruction post NF making a field current instruction from a speed deviation and an armature voltage vs. a field current value instruction post EF making a field current instruction from an armature voltage to control an armature voltage constant are provided on a field current controlling system and a lower level one among instructions from these both instruction posts is given a priority at a lower level priority post FL to be a field current instruction

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