Rotary Detector Control Circuit for Textile Drive Detents
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Solution Overview
Problem
Textile machine drive arrangements are complex and costly due to the need for numerous mechanical operating elements to control and identify individual drives within multiple drive trains, which complicates independent operation and encoding of drive positions.
Innovation Solution
A control device with a detector arrangement to detect and evaluate the direction and angle of rotation of electric motor rotors, using a control circuit to apply a holding torque and create perceptible detents, allowing drives to be controlled through rotational inputs, reducing the need for separate operating elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical operating elements are provided for each individual drive to enable independent control and identification, then the drives can be controlled and identified individually, but the drive arrangement becomes complicated and expensive
Solution Approach 1:
The patent merges the functions of mechanical operating elements into the rotary detector itself. The rotary detector serves both as the identification input device and as the control activation mechanism. By integrating these functions, the system eliminates the need for separate mechanical operating elements for each drive, reducing complexity while maintaining independent control and identification capabilities.
Solution Approach 2:
The rotary detector is designed to serve multiple functions simultaneously - it provides both the mechanical input for drive identification and the activation signal for drive control. The detector's rotational position directly encodes the drive identity while its rotation triggers the control sequence, making the system self-sufficient without requiring additional external operating elements.
2Loss of information
If mechanical operating elements are provided for each drive to encode installation position and assign drives, then individual drive identification is achieved, but costs increase due to the large number of operating elements
Solution Approach 1:
The rotary detector is designed as a universal input device that can encode multiple pieces of information through its rotational characteristics. By varying the number of detents, rotational direction, and angular position, a single detector type can provide unique identification for multiple drives across different installation positions, eliminating the need for different operating elements for different drives.
Solution Approach 2:
The patent replaces complex mechanical operating elements with an electromechanical rotary detector system. The detector uses magnetic or optical sensing rather than pure mechanical mechanisms, allowing for more compact design and reduced part count while maintaining the ability to encode drive identification and installation position information.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution simplifies the control device, reduces costs by eliminating or minimizing mechanical operating elements, and allows for flexible and cost-effective operation of textile machine drive arrangements, enabling efficient identification and control of individual drives.
Implementation Method 1
a detector arrangement assigned to the motor winding lines (22, 23, 24) of each drive (201, 202, 212; 301, 302, 312; 401, 402, 412), which is designed to detect and evaluate a direction of rotation and an angle of rotation
Implementation Method 2
a control circuit including the inverter is assigned, which is designed to selectively drive the electric motor and to apply a holding torque that counteracts the rotation of the electric motor when it is stationary
Data Source
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AI summary
The invention relates to a control device for a textile machine drive arrangement comprising at least one drive train (2, 3, 4) with a plurality of drives (201, 202, 212, 301, 302, 312, 401, 402, 412) and with a control module (5, 6, 7) for operating the drives, wherein each drive has an electric motor (19, 20, 21) with a plurality of motor winding lines (22, 23, 24), an inverter acting as an actuator for the drives, and a controller (16, 17, 18) associated with the electric motor for controlling the electric motor, and comprising a machine control unit (1) which is data-connected to the control module of the at least one drive train, wherein at least one first data bus line (8) is provided for connecting the machine control unit to the control module, wherein the at least one drive train has a further data bus line (10, 11, 12) exhibits,via which the control module of the drive train is connected to the controllers of the drives via data technology, and wherein a detector arrangement (25) is assigned to the motor winding lines of each drive, which is configured to detect a direction of rotation and an angle of rotation of a rotor of the electric motor, wherein a control circuit (36) comprising the inverter is further assigned to the motor winding lines, which is configured to selectively drive the electric motor and to impose a holding torque opposing the rotation of the electric motor, and wherein the controller of the electric motor and/or the control module of the drive trains and/or the higher-level machine control unit is configured to interact with the detector arrangement and the control circuit such that a local rotational stiffness occurs depending on the direction of rotation and the angle of rotation.