Permanent-Magnet Interaction Force Control for Versatile Braking
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Solution Overview
Problem
Existing interaction force control devices, such as those used in electromagnetic brakes and rotary electric machines, lack versatility as they primarily rely on energization to generate brake torque, limiting their application range.
Innovation Solution
An interaction force control device comprising a first element with a first permanent magnet and a second element with a second permanent magnet and a coil, where the relative positional relationship between the elements is variable, allowing the interaction force to be controlled by adjusting the magnetic force generated by the coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If brake torque is generated only by energization, then the control mechanism is simple, but the versatility is low
Solution Approach 1:
The device combines two permanent magnets (first and second permanent magnets) with a coil to enable multiple functions: attraction force generation, repulsion force generation, and brake torque generation. By controlling the coil's magnetic force, the system can switch between different operational modes, achieving multi-functionality without requiring separate devices for each function.
Solution Approach 2:
The relative positional relationship between the first and second elements is made variable, allowing dynamic adjustment of the interaction force. The coil's magnetic force can be increased or decreased to control the interaction between permanent magnets, enabling dynamic control of attraction and repulsion forces rather than fixed mechanical positioning.
2Adaptability or versatility
If only energization is used to generate brake torque, then the device structure is simple, but the application range is limited
Solution Approach 1:
The electromagnetic brake device can operate in multiple modes: generating brake torque through energization, generating attraction force between permanent magnets, generating repulsion force between permanent magnets, and controlling interaction force by varying relative positions. This multi-functionality expands the application range while maintaining a unified device structure.
Solution Approach 2:
The coil acts as an intermediary that controls the magnetic force of the second permanent magnet, which in turn controls the interaction force between the first and second permanent magnets. This intermediary mechanism enables precise control of the interaction force and allows the system to achieve multiple functions through a single control element.
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 solution enhances the versatility of interaction force control devices by enabling control of interaction force in various ways, including attraction, repulsion, and elimination, through the manipulation of magnetic forces, thereby expanding their application in electromagnetic brakes and rotary electric machines.
Implementation Method 1
a second element (30) including a second permanent magnet (M) and a coil (C), wherein a relative positional relationship between the first and second elements (10, 30) is variable, mutual magnetic force of the first and second permanent magnets (m, M) generates interaction force between the first and second elements (10, 30), magnetic force of the second permanent magnet (M) is capable of increasing and decreasing in accordance with magnetic force generated by the coil (C)
Implementation Method 2
mutual magnetic force of the first and second permanent magnets (m, M) generates interaction force between the first and second elements (10, 30)
Data Source
AI summary
An interaction force control device includes a first element including a first permanent magnet and a second element including a second permanent magnet and a coil. A relative positional relationship between the first and second elements is variable. Mutual magnetic force of the first and second permanent magnets generates interaction force between the first and second elements. Magnetic force of the second permanent magnet is capable of increasing and decreasing in accordance with magnetic force generated by the coil. The interaction force is controlled by changing the magnetic force generated by the coil.