Electrodynamic Converter Detent Torque Reduction
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Solution Overview
Problem
Conventional claw pole generators suffer from high detent torque due to their structural design, which cannot be eliminated, and are costly to manufacture, making them inefficient for miniaturized applications such as energy harvesting in low-power consumer devices.
Innovation Solution
An electrodynamic converter design featuring two claw disks with oppositely magnetized magnetic components and soft magnetic material flux elements, where the magnetic flux circuit is alternately closed and opened with an angular offset, reducing detent torque and manufacturing costs by using a simplified, cost-efficient structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional claw pole machine structure is used, then generator function is achieved, but detent torque becomes unreasonably high
Solution Approach 1:
The generator is divided into two separate claw disks (first and second) with different numbers of claws, each interacting with its own magnetic flux components. This segmentation allows the detent torque effects to be distributed and balanced, reducing the overall detent torque while maintaining the necessary generator function.
Solution Approach 2:
The first and second claw disks are designed with different numbers of claws (asymmetric configuration), and the magnetic flux components have different polarities. This asymmetric design creates complementary magnetic flux patterns that balance the detent torque, eliminating the unreasonably high detent torque problem of conventional symmetric claw pole machines.
2Ease of manufacture
If transverse flux machine structure is used, then generator function is achieved, but manufacturing costs become unreasonably high
Solution Approach 1:
The complex flux-conducting structure is segmented into two separate claw disks with simpler individual geometries. Each claw disk interacts with its own set of magnetic flux components, allowing for easier manufacturing of individual parts while achieving the transverse flux machine function through their combined operation.
Solution Approach 2:
Instead of using a single complex claw pole structure with complicated geometry, the invention inverts the approach by using two simpler claw disks with different claw counts. This inversion simplifies the manufacturing of individual components while maintaining the transverse flux machine's generator function.
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 design significantly reduces detent torque and manufacturing costs, enabling the creation of miniaturized, cost-effective generators suitable for low-power applications like energy harvesting in consumer electronics and industrial sensors.
Implementation Method 1
The electrodynamic converter can be operated both as a generator for the conversion of mechanical energy into electrical energy and as a motor for the conversion of electrical energy into mechanical energy
Implementation Method 2
The electrodynamic converter comprises magnetic flux components that feature oppositely magnetized magnetic components and magnetic flux elements of soft magnetic material
Data Source
AI summary
The application relates to an electrodynamic converter (1), comprising a coil (11), a claw disk (7) associated with the coil (11) and having a disk component (7a) that can be rotated about an axis of rotation and a disk component (7b) that is stationary relative thereto, comprising a further claw disk (8) associated with the coil (11) and having a disk component (8a) that can be rotated about the axis of rotation and a disk component (8b) that is stationary relative thereto, and comprising magnetic flux components, which have oppositely magnetized magnetic components (9, 10; 12, 13) and magnetic flux elements composed of soft magnetic material, of which at least some are associated with a magnetic flux through the claw disk (7) or a further magnetic flux through the further claw disk (8) during operation, which are formed in alternation as the rotatable disk component (7a) of the claw disk (7) and the rotatable disk component (8a) of the further claw disk (8) are rotated, wherein the magnet-flux-closing relative positions for the claw disk (7) and the further claw disk (8) are formed having an angular offset to each other, as are also non-magnetic relative positions.