Wireless Power Feeding in Helium-Sealed Disk Drives
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Solution Overview
Problem
Conventional disk devices face challenges in maintaining airtightness and reducing helium gas leakage while allowing for wireless power feeding, which complicates the design and increases the size of sealing components, potentially leading to manufacturing issues and reduced performance.
Innovation Solution
The implementation of a disk device with a housing that includes a sealing material to close transmission holes and a wireless power feeding system with antennas positioned inside the housing, allowing for wireless power transmission without the need for wired connections or additional connectors, thereby reducing the size of sealing components and minimizing helium leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a connector is used to connect the control circuit board and sealing board for wired power feeding, then power transmission is reliable, but the sealing board size increases and manufacturing complexity increases
Solution Approach 1:
The patent extracts the connector from the sealing board by implementing wireless power feeding. The power feeding antenna is integrated into the control circuit board, and the power receiving antenna is integrated into the actuator, completely removing the need for connectors on the sealing board. This resolves the contradiction by eliminating the source of complexity while maintaining power transmission functionality through wireless electromagnetic coupling.
Solution Approach 2:
The patent replaces the mechanical connector-based power transmission system with a wireless electromagnetic field-based power transmission system. Instead of using physical connectors to transmit power, the system uses electromagnetic induction between the power feeding antenna and power receiving antenna to transfer energy, thereby eliminating mechanical complexity while maintaining reliable power transmission.
2Ease of operation
If the sealing board is enlarged to accommodate connectors, then wired power feeding is enabled, but helium gas leakage increases due to larger sealing material requirements
Solution Approach 1:
The patent extracts the power feeding connection from the sealing board by implementing wireless power transmission. The power feeding antenna is placed on the control circuit board, and the power receiving antenna is placed on the actuator, completely removing the need for connectors and associated sealing board enlargements. This eliminates the source of helium leakage while maintaining power feeding capability.
Solution Approach 2:
The patent substitutes the mechanical connector system with a wireless electromagnetic field system, eliminating the need for physical connections that would require enlarged sealing boards. This allows the sealing board to maintain its original compact size, thereby preventing helium gas leakage while still enabling power transmission to the actuator.
3Power
If additional connectors and wiring are added for power feeding, then power transmission is achieved, but the overall device size increases
Solution Approach 1:
The patent merges the power feeding antenna with the control circuit board and the power receiving antenna with the actuator, integrating multiple functions into existing components. This eliminates the need for separate connectors and wiring harnesses, thereby maintaining power feeding capability while avoiding an increase in overall device size.
Solution Approach 2:
The patent replaces the mechanical wiring and connector system with a wireless electromagnetic field-based power transmission system. This substitution eliminates the physical space required for connectors, cables, and associated mounting structures, thereby maintaining compact device dimensions while achieving reliable power feeding to the actuator.
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 enables wireless power feeding of disk devices, reduces the size and complexity of sealing components, and minimizes helium gas leakage, improving manufacturing efficiency and device performance.
Implementation Method 1
a first wireless power feeding device having a first power feeding antenna. The first power feeding antenna is located more inward of the housing than the outer surface of the first sealing material, and receives power transmitted through the first sealing material by wireless power feeding
Data Source
AI summary
According to one embodiment, a disk device includes a housing having a first transmission hole, a magnetic disk, a head, a first sealing material having an inner surface and an outer surface and closing the first transmission hole, and a first wireless power feeding device having a first power feeding antenna. The first power feeding antenna is located mere inward of the housing than the outer surface of the first sealing material, and receives power transmitted through the first sealing material by wireless power feeding.