Rotary Electric Machine Integrating Transformer Windings
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Solution Overview
Problem
Existing rotary electric machine and in-vehicle systems have large sizes, necessitating a more compact design for improved efficiency and reduced manufacturing costs.
Innovation Solution
A rotary electric machine is designed with a rotor and stator magnet core, incorporating a transformer primary and secondary coil configuration connected to a power circuit and battery via a DC/AC converter, allowing for shared components to reduce overall size and eliminate the need for separate transformers, while also integrating a reactor functionality within the machine to enhance space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate transformer and reactor circuits are used in the rotary electric machine system, then the system has sufficient functionality for power conversion and charging, but the overall size becomes large
Solution Approach 1:
The patent combines the transformer primary coil and secondary coil windings within the same stator core structure, merging the transformer functionality into the rotary electric machine. This integration eliminates the need for separate external transformer circuits, thereby reducing overall system size while maintaining power conversion functionality.
Solution Approach 2:
The stator core structure is designed to serve multiple functions: it provides the magnetic circuit for the rotary electric machine operation and simultaneously houses the transformer windings for power conversion. This multi-functionality allows the same structural components to fulfill both motor/generator operation and transformer-based power conversion roles.
2Ease of operation
If multiple separate circuits (driving circuit and charging circuit) are provided, then the system can independently control motor operation and battery charging, but the device complexity increases
Solution Approach 1:
The patent merges the driving circuit and charging circuit into a single integrated circuit structure. The same circuit components and control system manage both motor operation and battery charging functions, reducing device complexity while maintaining independent control capability through software or control logic switching.
Solution Approach 2:
The integrated circuit is designed to perform multiple functions: it controls the rotary electric machine as a motor during vehicle operation and switches to charging mode when connected to an external power source. This universal circuit design eliminates the need for separate dedicated circuits for each function.
3Adaptability or versatility
If separate transformer and reactor components are integrated into the system, then complete power conversion functionality is achieved, but manufacturing costs increase
Solution Approach 1:
By merging the transformer windings with the rotary electric machine stator structure, the patent eliminates the need for separate transformer manufacturing and assembly processes. This integration reduces manufacturing steps, lowers production costs, and simplifies quality control while maintaining complete power conversion capability.
Solution Approach 2:
The stator core and winding structure serves dual purposes: enabling the rotary electric machine operation and providing the transformer functionality for power conversion. This multi-functional design reduces the total component count and manufacturing complexity, leading to lower production costs.
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 compact design achieves size reduction and lower manufacturing costs by integrating transformer and reactor functionalities within the rotary electric machine, enabling efficient power conversion and charging without increasing vehicle cabin space requirements.
Implementation Method 1
a transformer primary coil wound around the stator magnet core in an insulation state and connected to a power circuit; a transformer secondary coil wound around the stator magnet core in an insulation state and connected to a battery by interposing a DC/AC converter
Implementation Method 2
a rotary electric machine including a rotor 10 and a stator 20
Data Source
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AI summary
A rotary electric machine includes a rotor; a stator magnet core; a transformer primary coil wound around the stator magnet core in an insulation state and connected to a power circuit; a transformer secondary coil wound around the stator magnet core in an insulation state and connected to a battery by interposing a DC/AC converter.