Armature Coil Structure with Selective Connection Ports for Variable Output
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Solution Overview
Problem
Existing armature coils in magnetic generators and motors face issues with voltage imbalance and short lifetime due to high peak voltages when operated with pulse width modulation inverters, and require multiple coil and magnet configurations for different output voltage specifications, leading to increased production costs and complexity.
Innovation Solution
A coil structure with connection ports at both ends of each slot, allowing for external connection wires to selectively connect these ports to change output characteristics, and a coil connection control apparatus with switching devices to configure multiple coil circuits, enabling flexible output voltage and current adjustments without changing the armature coil or field magnet specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple types of armature coils and field magnets are prepared for different output voltage specifications, then various output voltage characteristics can be achieved, but production costs increase and mass production effects cannot be obtained
Solution Approach 1:
The patent applies universality by designing a single type of armature coil structure that can serve multiple output voltage specifications through different connection configurations. The coil structure includes multiple connection ports that allow the same physical coil to be connected in various series/parallel combinations to achieve different voltages, eliminating the need to manufacture multiple coil types for different specifications
Solution Approach 2:
The patent segments the armature coil into multiple independent coil groups with separate connection ports, allowing each group to be independently connected to achieve different voltage outputs. This segmentation enables the same coil structure to be configured for various output specifications by changing connection patterns rather than manufacturing different coils
2Adaptability or versatility
If the armature coil structure is changed to achieve different output voltage specifications, then various output characteristics can be obtained, but device complexity and manufacturing complexity increase
Solution Approach 1:
The patent introduces dynamic reconfigurability through switching devices that can change the connection pattern of coil groups based on the desired output specification. The same physical coil structure can be dynamically reconfigured for different voltages by activating different switching combinations, avoiding the need for multiple static coil designs
3Speed
If high peak voltage is applied to the armature coil for pulse width modulation operation, then the inverter can operate at high carrier frequency, but the lifetime of the armature coil is shortened
Solution Approach 1:
The patent changes the electrical parameters of the armature coil by adjusting the connection configuration of coil groups to achieve different equivalent inductances and resistances. This parameter adjustment allows optimization of voltage stress distribution and current characteristics to reduce peak voltages and extend coil lifetime while maintaining high carrier frequency operation capability
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 allows for multiple output characteristics to be achieved using the same armature coil structure, reducing production costs and extending coil lifetime by enabling selective output adjustments, and facilitates mass production by eliminating the need for multiple coil and magnet configurations.
Implementation Method 1
a magnetic electricity generator (three-phase synchronized electricity generator) where a permanent magnet is used for a magnetic field
Data Source
AI summary
Provided is a magnetic electricity generator having a coil structure capable of selectively changing output characteristics by using the same armature coil structure. In the magnetic electricity generator having armature coils and a magnet, the armature coils are configured with plural circuits of three-phase armature coils, wherein coil groups of each phase coil of the three-phase armature coils are divided into two or more coil groups, connection ports (T1 to T7, T9, T11, T13 to 22, T24, T26, and T28 to T30) are disposed to each coil group, and intermediate connection ports (T8, T10, T12, T23, T25, and T27) are disposed to one coil group in each phase coil, and wherein the connection ports and the intermediate connection ports are selectively connected with wires between the phase coils according to desired output voltage and current, so that output voltage characteristics can be adjusted according to connection scheme.