Alternating Heater Control for Hard Disk Driver Thermal Management
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Solution Overview
Problem
In low-temperature environments, electronic components like fluid dynamic bearings in hard disk drivers can solidify, leading to damage and data loss, and existing heating systems with multiple heaters reduce efficiency due to increased power consumption.
Innovation Solution
A heating circuit with thermal sensors and a controller that generates alternating enable signals for heaters to efficiently heat hard disk drivers, preventing simultaneous and continuous heating to maintain optimal power usage and prevent solidification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple heaters are activated simultaneously to heat multiple hard disk drivers, then the heating speed and protection effectiveness are improved, but the power consumption increases and heating efficiency of each heater is reduced
Solution Approach 1:
The patent applies periodic action by alternately activating heaters in different groups. The controller divides heaters into at least two groups and activates them in alternating periods rather than simultaneously. This allows the system to maintain reliable protection for multiple hard disk drivers while managing power consumption through time-based distribution of heating loads.
2Reliability
If multiple heaters are activated simultaneously, then the heating coverage is improved, but the average electric power obtained by each heater is reduced
Solution Approach 1:
The controller implements periodic action by alternating the activation of different heater groups over time. This ensures that all hard disk drivers receive adequate heating coverage across different time periods, while each individual heater maintains sufficient power levels during its active periods, avoiding the power dilution that would occur with simultaneous activation of all heaters.
3Device complexity
If manual heater activation is required before booting up, then the heating control is simplified, but the user operation complexity increases and boot time is extended
Solution Approach 1:
The system applies self-service by automatically detecting the temperatures of hard disk drivers and autonomously controlling heater activation without requiring user intervention. The controller monitors temperature conditions and activates appropriate heater groups automatically, thereby simplifying user operation while maintaining effective heating control through intelligent automation.
4Device complexity
If manual heater activation is required, then the heating process is simplified, but the time required before booting up is increased
Solution Approach 1:
The controller implements self-service by automatically monitoring hard disk driver temperatures and activating heaters only when and where needed, eliminating unnecessary delays. This automated temperature-based control reduces boot time compared to manual activation processes, while keeping the heating control mechanism relatively simple through rule-based automatic decision-making.
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
Ensures efficient heating of hard disk drivers in low-temperature environments, preventing damage and ensuring data integrity while optimizing power consumption by varying the waveforms of enable signals to prevent power overload.
Implementation Method 1
a plurality of thermal sensors, a controller and a plurality of heaters. The thermal sensors are provided for respectively detecting a temperature of each hard disk driver
Implementation Method 2
The purpose of heating the hard disk driver or the battery is to maintain the viscous liquid film or the electrolyte in the fluid dynamic bearing in a liquid state without being solidified
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
A method for entering an operation mode in a low-temperature environment is applicable in a situation that plural electronic devices (900a, 900b) in an electronic apparatus (800) are not activated. Through performing the method, the electronic apparatus (800) obtains a temperature (Td1, Td2) of each electronic device (900a, 900b) after receiving a request of a user. Then the electronic apparatus (800) determines whether the temperatures (Td1, Td2) of all the electronic devices (900a, 900b) reach a threshold value. If the temperatures of at least two electronic devices (900a, 900b) do not reach the threshold value, the electronic apparatus (800) generates a plurality of corresponding enable signals for the electronic devices (900a, 900b) having the temperatures (Td1, Td2) lower than the threshold value. The waveforms of the enable signals (PWM1, PWM2) vary alternately. The electronic apparatus (800) transfers the enable signals to a plurality of corresponding heaters (120a, 120b). Being activated by the received enable signal (PWM1, PWM2), each of the heaters (120a, 120b) heats the corresponding electronic device (900a, 900b).