Alternating Winding Direction Motor Unit for Building Door Drive
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Solution Overview
Problem
Existing motor units for door drives face challenges in winding stators due to complex winding schemes and space constraints, leading to potential malfunctions and inefficient electrical contact distribution.
Innovation Solution
The motor unit features a winding system where the winding direction alternates between adjacent coils over the entire circumference, allowing for simpler automatic winding and uniform distribution of electrical contacts, eliminating wire overlaps and enabling efficient routing of winding wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the winding direction for all coils is observed exactly to be uniform, then the motor unit operates reliably, but the winding scheme becomes overly complex and difficult to manufacture
Solution Approach 1:
The patent applies periodic action by alternating the winding direction of adjacent coils in a regular pattern. Instead of maintaining a uniform winding direction throughout, the invention systematically alternates the winding direction from one coil to the next, creating a periodic pattern that simplifies the overall winding scheme while maintaining motor reliability through structured variation.
2Ease of manufacture
If the winding wires are led out of the same gaps between the teeth, then the winding process is simplified, but space constraints cause contact problems and uniform distribution is lost
Solution Approach 1:
The patent applies local quality by varying the winding direction of individual coils based on their specific position around the stator circumference. This localized variation in winding direction causes the winding wires to emerge from different gaps between teeth, ensuring uniform spatial distribution of electrical contacts while maintaining ease of manufacture through a systematic local adaptation rather than global complexity.
3Manufacturing precision
If the winding wires are led out evenly spaced, then the electrical contacts are uniformly distributed, but wire overlaps occur and routing becomes space-critical
Solution Approach 1:
The patent applies inversion by reversing the winding direction of adjacent coils instead of maintaining a consistent direction. This inverted approach to winding direction causes wires to emerge from alternating gaps, achieving uniform contact distribution while eliminating wire overlaps and simplifying the routing paths through systematic directional alternation.
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 facilitates a more straightforward and efficient winding process with automatic winding machines, ensuring uniform contact distribution and eliminating wire overlaps, thereby enhancing the reliability and performance of the motor unit.
Implementation Method 1
The stator has a winding system with a first winding unit, comprising three strands, and with a second winding unit, comprising a further three strands, the winding units being electrically separated from one another
Data Source
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AI summary
The present invention relates to a motor unit (1) for a door drive (100) for arrangement on or in connection with a building door, with which at least one leaf element of the building door is movable, comprising a housing (10) in which a stator (11) is stationary and wherein a rotor (12) is rotatably arranged in the housing (10) and has an output shaft (13), wherein the output shaft (13) can be brought into operative connection with the leaf element in a driving manner, and wherein the stator (11) comprises a winding system with a first winding unit having three strands (S1.1, S1.2, S1.3) and a second winding unit having three strands (S2.1, S2.2, S2.3), wherein the winding units are electrically separated from one another, and wherein the stator (11) has a number of adjacent teeth (14) on which the strands (S1.1, S1.2, S1.3, S2.1, S2.2, S2.3) are wound into coils (15).According to the invention, the winding direction of the adjacent coils (15) of at least one of the winding units is formed alternately from coil (15) to coil (15).