Long-Stator Linear Motor Transfer Steering via Electromagnetic Lateral Forces
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Solution Overview
Problem
Conventional long-stator linear motors require additional auxiliary coils and mechanical components for transfer positions, leading to increased complexity, reduced propulsion force, and increased wear, which complicates flexible and efficient transport unit guidance.
Innovation Solution
A method where stator currents are used to generate electromagnetic lateral forces by differing the lateral forces on both sides of the transport unit, allowing for steering without additional auxiliary elements, using the existing drive coils and excitation magnets to maintain propulsion force and control the steering effect through regulation of the electromagnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional auxiliary coils and mechanical components are used for transfer positions, then the transport unit can be guided through transfer positions, but the device complexity increases and propulsion force decreases
Solution Approach 1:
The drive coils are designed to perform multiple functions: they generate propulsion force during normal transport and generate electromagnetic lateral forces for steering at transfer positions. This eliminates the need for separate auxiliary coils and mechanical guidance components, reducing device complexity while maintaining adaptability for transfer operations
Solution Approach 2:
The patent combines the propulsion function and steering function into a single integrated system using the existing drive coils. By controlling the excitation magnets and drive coils to generate lateral forces, the system merges what would traditionally be separate auxiliary systems into one unified mechanism, thereby reducing overall device complexity
2Adaptability or versatility
If additional auxiliary coils are used for transfer positions, then steering is possible, but the propulsion force is reduced
Solution Approach 1:
The system dynamically adjusts the function of the drive coils based on operational mode. During normal transport, the coils generate propulsion force. At transfer positions, the control system dynamically reconfigures the excitation to generate electromagnetic lateral forces for steering. This dynamic switching allows full propulsion force to be maintained during transport while enabling steering capability when needed, without the force reduction associated with dedicated auxiliary coils
3Adaptability or versatility
If mechanical components are used for transfer positions, then transport unit guidance is possible, but wear increases
Solution Approach 1:
The patent replaces mechanical guidance components with an electromagnetic field-based steering mechanism. By using excitation magnets and drive coils to generate controlled electromagnetic lateral forces, the system eliminates mechanical contact and friction at transfer positions, thereby reducing wear and improving reliability while maintaining the ability to guide transport units through transfer positions
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 approach enables flexible and efficient guidance of transport units through transfer positions with reduced wear and increased safety, maintaining propulsion force while decoupling propulsion and steering control, thus enhancing the operational efficiency and reliability of long-stator linear motors.
Implementation Method 1
By way of the interaction of the excitation magnets with drive coils in the area of the transport unit, drive forces can be generated, with which the transport unit can be moved in the longitudinal direction
Implementation Method 2
due to the interaction of the excitation magnets with ferromagnetic components of the guide construction on both sides of the transport unit, excitation magnetic side forces act on the transport unit
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
In order to realize a transfer position in a long stator linear motor in which a transport unit (Tn) is magnetically steered to be deflected from a first transport section (Am) to a second transport section (An), it is provided that in a transfer area of the transfer position (U) a stator current (iA1, iA2) is impressed into at least one drive coil (7, 8) on at least one side of the transport unit (Tn), which generates an electromagnetic lateral force (FEMS1, FEMS2) on the transport unit (Tn) and the resulting lateral forces (F1, F2) on both sides of the transport unit (Tn), each as the sum of the acting excitation magnetic lateral force (FPMS1, FPMS2) and the electromagnetic lateral force (FEMS1, FEMS2), are different in magnitude in order to generate a steering effect (L).