Actuator Regulating Member Stabilizes Rotor Movement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The movement of a rotor in an actuator becomes unstable when the inner magnetic pole portion is positioned too close to the rotor, leading to potential mechanical instability and inefficiency.
Innovation Solution
An actuator design featuring a coil, a bobbin, a rotor, and stators with inner and outer magnetic pole portions, along with a regulating member that prevents the inner magnetic pole portions from being too close to the rotor, ensuring stable rotor movement by controlling the magnetic flux and mechanical displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the inner magnetic pole portion is positioned close to the rotor to reduce actuator size, then the actuator becomes more compact, but the rotor movement becomes unstable
Solution Approach 1:
A regulating member is introduced as an intermediary component between the inner magnetic pole portion and the rotor. This regulating member includes a regulating portion that contacts the tip of the inner magnetic pole portion, preventing it from approaching too close to the rotor while still allowing the actuator to maintain a compact size. The intermediary structure resolves the contradiction by mediating the spatial relationship between the magnetic pole and rotor.
2Power
If the inner magnetic pole portion is positioned close to the rotor to increase magnetic flux density, then the output increases, but mechanical instability occurs
Solution Approach 1:
The regulating member acts as a mediator that maintains an optimal gap between the inner magnetic pole portion and the rotor. This allows the actuator to achieve high output through increased magnetic flux density while preventing mechanical instability by ensuring the magnetic pole does not contact or come too close to the rotor during operation.
3Power
If the coil is wound more times to increase output, then the power increases, but the resistance increases significantly
Solution Approach 1:
The magnetic pole structure is segmented into outer magnetic pole portions and inner magnetic pole portions. The inner magnetic pole portions extend into the bobbin to increase magnetic flux density without requiring additional coil windings. This segmentation allows the actuator to achieve high output through improved magnetic circuit design rather than simply increasing coil turns, thereby avoiding excessive resistance and energy loss.
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 effectively stabilizes rotor movement, enhances mechanical efficiency, and allows for increased coil winding without significant resistance increase, resulting in a compact actuator with high output capabilities.
Implementation Method 1
an actuator including a coil 3, a bobbin 2 around which the coil 3 is wound
Implementation Method 2
first outer magnetic pole portions 4c extending from the first base portion 4l along the shaft 6 and positioned outside the bobbin 2 and first inner magnetic pole portions 4b extending from the first base portion 4l along the shaft 6 and positioned between the rotor 1 and the inside of the bobbin 2
Data Source
AI summary
To provide an actuator in which an unstable movement of a rotor is controlled. An actuator includes a coil, a bobbin around which the coil is wound, a rotor positioned inside the bobbin, a shaft to which the rotor is fixed and which is rotatably supported, a stator including a base portion positioned on one end side of the shaft, outer magnetic pole portions extending from the base portion along the shaft and positioned outside the bobbin and inner magnetic pole portions extending from the base portion along the shaft and positioned between the rotor and the inside of the bobbin, a stator including a base portion positioned on the other end side of the shaft, outer magnetic pole portions extending from the base portion along the shaft and positioned outside the bobbin and inner magnetic pole portions extending from the base portion along the shaft and positioned between the rotor and the inside of the bobbin and a cover positioned between the rotor and the stator and contacting tip portions of the inner magnetic pole portions to regulate the approach of the inner magnetic pole portions to the rotor.