Linear Motor Module Gaps for Cost-Efficient Transport Rails
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Solution Overview
Problem
Conventional linear transport systems require a large number of motor modules along the guide rail, making them costly and resource-intensive, especially for long systems.
Innovation Solution
The system introduces gaps between motor modules, where the rotor length corresponds to the sum of motor module length and gap length, allowing for reduced motor module usage and incorporating magnetic sensors for precise position determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If motor modules are arranged continuously along the entire guide rail, then the linear transport system achieves reliable drive coverage, but the system becomes costly and resource-intensive
Solution Approach 1:
The continuous guide rail is segmented into multiple sections with gaps between motor modules. The rotor interacts with multiple motor modules simultaneously, allowing the system to maintain continuous drive capability while using discrete, separated motor module units rather than a continuous array.
Solution Approach 2:
Multiple motor modules are combined to act on a single rotor simultaneously. The rotor spans across multiple motor modules and interacts with their magnetic fields together, merging the functionality of multiple modules to provide continuous drive coverage across the gap region.
2Reliability
If the rotor length is increased to cover gaps between motor modules, then the drive continuity is maintained, but the rotor becomes longer and more complex
Solution Approach 1:
The magnetic field distribution is optimized locally within each motor module and in the gap regions. The rotor magnets are positioned and dimensioned to create appropriate local magnetic field interactions with each motor module's drive coils, ensuring effective force generation both under motor modules and across gaps without requiring excessive rotor length.
Solution Approach 2:
The system optimizes parameters such as magnet strength, coil current, and air gap dimensions to maintain effective magnetic coupling across the gaps between motor modules. By adjusting these parameters, the rotor can be kept compact while still achieving reliable drive continuity through the gaps.
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 design achieves cost savings and resource efficiency while maintaining effective magnetic field drive and precise position control, reducing the number of motor modules required.
Implementation Method 1
a linear motor for driving the movable unit along the guide rail. The linear motor comprises a stator and a rotor, the stator comprising a plurality of motor modules arranged in a stationary manner along the guide rail, each of which comprises a plurality of drive coils, where the rotor is arranged on the movable unit and comprises a plurality of magnets
Data Source
AI summary
A linear transport system includes a movable unit, a guide rail and a linear motor with a stator and a rotor for driving the movable unit along the guide rail. The stator has a plurality of motor modules arranged along the guide rail, each with a plurality of drive coils. The rotor is arranged on the movable unit and includes a plurality of magnets. A gap is arranged between at least two of the motor modules. The motor module length corresponds to the distance between two drive coil centers multiplied by the number of drive coils per motor module. The rotor length corresponds to the distance between two magnet centers multiplied by the number of magnets on the rotor. The gap length corresponds at least to the motor module length, and the rotor length corresponds at least to the sum of the motor module length and the gap length.