Counter-Rotating Multi-Output Generator in a Nested Rotor Layout

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Solution Overview

Problem

Conventional generators with a single output port are limited in output value and become bulky and complex when multiple rotors and stators are used, leading to poor productivity.

Innovation Solution

A generator design with two rotors rotating in opposite directions within a single stator, utilizing a first rotor inside a stator and a second rotor inside the first rotor, with separate output induction parts for each coil, allowing compact size and high output generation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If multiple rotors and stators are used to increase output, then the output value increases, but the device becomes bulky in size and complicated in internal configuration

Engineering Contradiction:
Improveoutput valueVSAvoidinternal configuration
Core Design Contradiction:
PowerVSDevice complexity

Solution Approach 1:

The patent applies nesting by placing the second rotor inside the first rotor, and the first rotor inside the stator, creating a compact nested structure. This allows multiple rotors to be accommodated within a single stator without increasing the overall device size, thereby increasing output while maintaining compact configuration and simplifying internal arrangement.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent utilizes the longitudinal dimension by extending rotors and stators along the longitudinal axis, allowing multiple rotors to be arranged in series within a single stator. This dimensional approach enables increased output capacity without expanding the radial or lateral footprint, maintaining compact size while accommodating multiple rotating components.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Power

If multiple rotors and stators are used to increase output, then the output value increases, but the device becomes bulky in size

Engineering Contradiction:
Improveoutput valueVSAvoiddevice size
Core Design Contradiction:
PowerVSVolume of moving object

Solution Approach 1:

The nested configuration allows the second rotor to be positioned inside the first rotor, and both within the stator, maximizing the use of internal space. This nesting principle enables the generator to achieve high output through multiple rotors while maintaining a compact external size, as the rotors occupy the same radial space rather than expanding the device envelope.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

By arranging multiple rotors along the longitudinal dimension within a single stator, the patent increases power output without proportionally increasing device volume. The nested longitudinal arrangement allows multiple rotating mass to be packed into the available space, achieving high output in a compact footprint.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Power

If a single output port is used, then the configuration is simple, but the output value is limited

Engineering Contradiction:
Improveoutput valueVSAvoidoutput port configuration
Core Design Contradiction:
PowerVSDevice complexity

Solution Approach 1:

The single stator serves multiple functions by accommodating multiple rotors and generating multiple induced currents simultaneously. This multi-functional design allows the generator to produce high output through a single versatile stator structure, avoiding the need for multiple separate stators and their associated output ports, thereby maintaining configuration simplicity while achieving high power output.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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

The generator achieves a compact configuration while producing high output by utilizing opposite rotor directions, simplifying internal components and preventing overheating through ventilation and fan integration.

Implementation Method 1

an induced current generated from the coil of the stator is outputted

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

an induced current generated from the coil of the stator is outputted

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20250211060A1Generator with multiple outputs
Publication Date: 2025.06.26 PARK MYEONG SU
  • US20250211060A1 patent drawing
  • US20250211060A1 patent drawing
  • US20250211060A1 patent drawing

AI summary

A generator with multiple outputs, includes: an outer housing; a stator having a first coil wound thereonto; a first rotor having a plurality of permanent magnets coupled thereto in circumferential and longitudinal directions thereof; a second rotor having a second coil wound thereonto; a driving part placed on the outside of the outer housing to provide a driving force so that the first rotor and the second rotor rotate in opposite directions to each other; and first and second output induction parts adapted to induce and output induced currents generated from the first coil and the second coil according to the rotation of the first rotor relative to the stator and the rotation of the second rotor relative to the first rotor to the outside of the outer housing. The generator becomes entirely compact in size and configuration, while producing a high output.