Motor control unit

Abstract

A motor control unit of the present invention processes to high precision position. When the situation of position deviation (delta P) is more than the regulating value, to make speed feedback circulation be effective, and execute positioning control based on speed control. If the position deviation (delta P) is small than or equal to the regulating value, then to make speed feedback circulation be ineffective, and to execute positioning control based on phase control. On the base of phase control position control, to make statement q axis current (Iqr) is zero, and generate correction angle (theta p) by PI calculating component (13) based on the position deviation (delta p), to add phase angle (theta) while switching to the correction angle (theta P) using with adding machine (27). Current switching component (9) and voltage switching component (25) use corrected phase angle (theta) to process rotating coordinate switch.

Description

technical field

[0001] The present invention relates to a motor control device for positioning control. Background technique

[0002] In measuring instruments, monitoring cameras, semiconductor manufacturing equipment, inspection equipment, etc., high-precision positioning control is required. In addition, as a social background, products using batteries tend to increase, and demands for both high-efficiency operation and high-precision positioning operation are increasing. A general positioning control device includes a position feedback loop for generating a command rotational speed of the motor based on a position deviation, and a speed feedback loop for generating a command current or a command voltage of the motor based on the speed deviation.

[0003] Patent Document 1 describes a positioning control device that creates correction data for absolute position positioning control in advance, adds the correction data to a target position, and generates a command value for...

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