Motor control device

By calculating the position command and generating the speed command within the motor servo control device, the problem of mechanical end vibration was solved, thereby improving the response characteristics and cycle time of the control system.

CN114946120BActive Publication Date: 2026-05-08HITACHI IND EQUIP SYST CO LTD
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Patent Information

Application Number
CN202080092951.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-02-04
Filing Date
2020-12-04
Publication Date
2026-05-08
Estimated Expiration
2040-12-04

AI Technical Summary

Technical Problem

In the semi-enclosed structure of motor control systems in the FA field, the low mechanical rigidity leads to vibration at the mechanical ends, making it difficult to improve the response characteristics of the control system. Existing technologies make it difficult to achieve vibration reduction control in servo motor control devices.

Method used

Within the motor servo control device, a position command calculator and a speed command generator are used to calculate and generate actual speed commands that do not cause vibration, thereby achieving vibration reduction control and avoiding the need to process position commands within the upper-level system control device.

Benefits of technology

Vibration reduction control was implemented within the servo motor control device, which improved the response characteristics and cycle time of the control system and solved the problem of mechanical end vibration.

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Abstract

The present invention provides an electric motor control device capable of receiving a speed command from a superior system control device having a position controller, comprising: a position command estimator that calculates an estimated value of a position command based on a speed command and a motor shaft position response; and a speed command generator that generates an actual speed command such that an end portion of a machine connected to the electric motor does not vibrate based on the estimated value, the actual speed command being output from the speed command generator to a speed controller.
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