Method for postion control by adopting brushless dc motor for twisting cam mechanism of automatic bobbin winder

Abstract

The present invention relates to a method for making position control by adopting brushless D.C. motor in yarn joiner cam mechanism of atuoamtic bobbin winder. The whole control system utilizes the controller of yarn joiner cam mechanism to control rotation of brushless D.C. motor, said brushless D.C. motor can be used for driving reduction gear box, and said reduction gear box can be used for driving yarn joiner can mechanism which can be forward or backward rotated, a mechanical zero-position sensor is set on the cam mechanism, and the signal of said sensor can be transferred into the controller of the above-mentioned can mechanism, and is used as reference point of whole control system, and said controller can be used for collecting signals sent by three Hall sensors in the brushess D.C. motor and controlling the position of cam mechanism by using said signals.

Description

technical field [0001] The invention relates to the field of electrical control of textile machinery, in particular to a method for controlling the position of a yarn splicing cam mechanism of an automatic winder using a brushless DC motor Background technique [0002] At present, in this field, the control methods of the yarn splicing cam mechanism mostly adopt two forms. One is to use the asynchronous motor control method, such as the AC238 automatic winder of the German Schlafhorst Company. This method requires position detection. In addition, multi-pole magnetic rings and two Hall sensors are installed, the control system is cumbersome, and the control accuracy is poor and the response is slow. The other is to use a stepping motor control method, such as ESPERO from Savio, Italy. This method has poor overload capacity, no position detection closed-loop control capability, and only relies on mechanical limit switches for single-point positioning. Contents of the inventi...

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Problems solved by technology

[0002] At present, in this field, the control methods of the yarn splicing cam mechanism mostly adopt two forms. One is to use the asynchronous motor control method, such as the AC238 automatic winder of the German Schlafhorst Company. This method requires position detection. In addition, multi-pole magnetic rings and two Hall sensors are installed, the control system is cumbersome, and the control accuracy is poor and the response is slow

The other is to use a stepping motor control method, such as ESPERO from Savio, Italy. This method has poor overload capacity, no position detection closed-loop control capability, and only relies on mechanical limit switches for single-point positioning.

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