Magnetic Head Current Switching for Dense High-Speed Recording
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Solution Overview
Problem
Existing magnetic recording devices face challenges in achieving high recording density and high-speed recording simultaneously.
Innovation Solution
A magnetic recording device with a magnetic head and controller that switches between two operations: one for stable AC magnetic field generation and another for quick magnetization response, using specific current values and configurations to optimize recording density and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional magnetic recording methods are used to improve recording density, then recording density increases, but recording speed decreases
Solution Approach 1:
The patent applies dynamics by switching between two distinct recording operations: a first operation using a first current value optimized for stable AC magnetic field generation to achieve high recording density, and a second operation using a second current value optimized for quick magnetization response to achieve high recording speed. This dynamic switching allows the system to adapt to different recording requirements and resolve the contradiction between density and speed.
Solution Approach 2:
The patent changes the current parameter supplied to the magnetic element between two discrete values. The first current value produces a first AC magnetic field strength suitable for high-density recording, while the second current value produces a second AC magnetic field strength suitable for high-speed recording. By changing this key parameter, the system can optimize performance for different operational requirements.
2Speed
If high current is supplied to achieve quick magnetization response, then recording speed improves, but recording density decreases
Solution Approach 1:
The system dynamically switches between two current values supplied to the magnetic element. When high recording speed is required, the second current value is used to achieve quick magnetization response. When high recording density is required, the first current value is used to generate stable AC magnetic fields. This dynamic adaptation resolves the trade-off between speed and density.
Solution Approach 2:
The patent changes the current parameter supplied to the magnetic element between a first current value (optimized for density) and a second current value (optimized for speed). By controlling this parameter switch, the system can achieve quick magnetization response when needed without permanently sacrificing recording density capability.
3Quantity of substance
If stable AC magnetic field generation is prioritized, then recording density improves, but response time increases
Solution Approach 1:
The patent implements dynamic operation switching between a first operation mode that prioritizes stable AC magnetic field generation for high recording density, and a second operation mode that prioritizes quick magnetization response for fast response time. This allows the system to minimize time loss by switching to the appropriate mode based on recording requirements.
Solution Approach 2:
The system changes the current parameter supplied to the magnetic element between two values: a first current value that generates stable AC magnetic fields for high density recording, and a second current value that enables quick magnetization response for fast response time. This parameter switching resolves the contradiction between density and response time.
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 device maintains high recording density while enabling high-speed recording by efficiently generating and responding to recording magnetic fields, enhancing overall recording performance.
Implementation Method 1
a coil... when a first coil current of a first frequency is supplied to the coil... a first signal having a first signal strength of a first component at the first frequency is generated
Data Source
AI summary
According to one embodiment, a magnetic recording device includes a magnetic head, and a controller. The magnetic head including a first magnetic pole, a second magnetic pole, a magnetic element provided between the first magnetic pole and the second magnetic pole, a coil, a first terminal, and a second terminal. The controller is configured to switch between a first operation and a second operation. In the first operation, the controller is configured to supply a first recording coil current to the coil while supplying a first recording element current to the magnetic element. In the second operation, the controller is configured to supply a second recording coil current to the coil while supplying a second recording element current to the magnetic element.