Electric Machine with Rotatable Magnet Rings for Field Control
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Solution Overview
Problem
Existing electrical machines for motor vehicles lack efficient operation due to limitations in magnet positioning and control, leading to suboptimal magnetic field profiles and performance.
Innovation Solution
The electrical machine features a stator with sequentially arranged rings and magnets, allowing for adjustable positioning and independent electrical actuation of electromagnets, enabling precise control of the magnetic field and rotor speed through varying voltages and currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If magnets are fixed on rigid structures, then structural stability is improved, but magnet positioning flexibility deteriorates
Solution Approach 1:
The patent applies the dynamics principle by making the magnet positioning system adjustable rather than fixed. The magnets are mounted on rings that can be rotated independently of each other, allowing the circumferential positioning of magnets to be dynamically changed. This enables optimization of the magnetic field profile under different operating conditions while maintaining structural stability through the rigid ring structures.
2Ease of manufacture
If magnets are arranged in fixed patterns, then manufacturing simplicity is improved, but operational efficiency deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the magnet assembly into multiple independent rings, each carrying magnets and capable of independent rotation. This segmentation allows for simplified manufacturing of individual rings while enabling complex operational control of the overall magnetic field, thus resolving the contradiction between manufacturing simplicity and operational efficiency.
Solution Approach 2:
By making the magnet rings dynamically adjustable, the system can optimize its performance for different operating conditions. The independent rotation capability of each ring allows the magnetic field profile to be adapted in real-time, improving operational efficiency without complicating the manufacturing of individual components.
3Device complexity
If single ring structure is used, then device complexity is reduced, but magnetic field control precision deteriorates
Solution Approach 1:
The patent uses multiple independent rings instead of a single ring structure. Each ring can be controlled independently, allowing for precise control of the magnetic field profile. This segmentation enables fine-tuned adjustment of magnet positions without requiring a single overly complex control mechanism.
Solution Approach 2:
The patent adds the axial dimension by stacking multiple rings along the axial direction. This dimensional change allows for independent control of magnet positions in both circumferential and axial directions, significantly improving magnetic field control precision while keeping each individual ring relatively simple in structure.
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 configuration enables efficient, rapid, and controlled operation of the electrical machine in both motor and generator modes, with rapid acceleration and braking capabilities, enhancing overall vehicle performance.
Implementation Method 1
The electrical machine comprises a stator, having at least one first magnet and at least one second magnet. The electrical machine further comprises a rotor, which is drivable by means of the stator, specifically by means of the magnets
Implementation Method 2
the magnets are appropriately positionable relative to one another in the circumferential direction of the electrical machine, as a result of which, for example, a magnetic field creatable by the magnets, specifically the profile thereof, can be influenced
Implementation Method 3
The second ring, together with the second magnet, is rotatable about the axis of rotation relative to the first ring and to the first magnet. The actuator comprises a first actuating element for example, by which the first ring is rotatable about the axis of rotation relative to the housing
Data Source
AI summary
An electric machine has a stator, which has at least one first magnet and at least one second magnet, and a rotor, which can be driven by the magnets and can rotate about an axis of rotation relative to the stator. The first magnet is held on a first ring and the second magnet is held on a second ring following the first ring in the axial direction of the electric machine. The second ring can, together with the second magnet, rotate about the axis of rotation relative to the first ring and the first magnet.