Motor Stator Connection Assembly with Centering Terminals

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Solution Overview

Problem

Existing methods for connecting electronic control boards to stator windings of small electric motors, such as those in roller blinds, face challenges due to bulky traditional connections and limited space, leading to unstable contact and interference with the motor casing.

Innovation Solution

A compact assembly featuring a plastic circular base with centering means and self-centering electrical terminals that allow direct and stable connection of the electronic control board to the stator windings, utilizing grooves and slots for secure wire arrangement and electrical contact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional connecting assemblies are used to connect electronic control board to stator windings, then electrical connection is established, but the connection becomes bulky and occupies excessive space

Engineering Contradiction:

Improveelectrical connection stabilityVSAvoidspace occupied by connecting assembly

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The electronic control board is positioned inside the motor housing, nested within the existing motor structure. The connecting assembly integrates the board, terminals, and insulation within a compact configuration that fits inside the motor compartment, eliminating the need for external wiring and reducing overall space occupation.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent merges multiple functions into a single integrated assembly: the electronic control board, electrical terminals, insulation elements, and mounting structure are combined into one compact unit. This consolidation eliminates separate wiring components and reduces the total volume required for the connection system.

Inventive Principle:

Principle #5Merging (Combining)

2Ease of manufacture

If electronic control board is positioned externally to the motor compartment, then connection to stator windings is established, but it interferes with available space in tight motor compartments

Engineering Contradiction:

Improveassembly convenienceVSAvoidspace available in motor compartment

Core Design Contradiction:

Ease of manufactureVSArea of stationary object

Solution Approach 1:

Inventive Principle:

Principle #7Nested doll (Nesting)

3Reliability

If wired connection is used between windings and electronic board, then electrical connection is established, but contact stability is insufficient

Engineering Contradiction:

Improvecontact stabilityVSAvoidconnection structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces traditional mechanical wired connections with a direct electrical terminal contact system. The terminals establish stable electrical contact through rigid mounting structures and contact surfaces, eliminating the need for flexible wires and connectors that are prone to loosening and contact instability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If electronic control board with covering and insulation system is placed outside casing, then electrical connection is established, but it reduces space available for other components

Engineering Contradiction:

Improveelectrical insulationVSAvoidspace occupied by board and insulation

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP1909362B1Assembly for connecting an electronic control board to the stator windings of an electric motor for roller blinds or the like

Publication Date: 2010.05.12 INARCA

Figure 1
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Figure 4~5

AI summary

An assembly for connecting an electronic control board to the stator windings of an electric motor for roller blinds or the like, which comprises a base (15) which has, on a first face (16), means (18) for centering on the stator (12) of the motor (11) at an end face (14) of the stator (12). A first body (20) for accommodating first electrical terminals (21) for direct connection to first leads (13a) of the stator windings (13) and a second body (22) for accommodating second electrical terminals (23) for direct connection to second leads (13b) of the stator windings (13) protrude from the opposite second face (19) of the base (15). The second electrical terminals (23) are in direct electrical contact with an electronic board (24); the second body (22) has a slot (25) which intersects the seats (26) on which the second electrical terminals (23) are provided; the electronic board (24) can be inserted in the slot (25).