Converter Control Dynamic Phase Selection Heat Dissipation
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Solution Overview
Problem
Conventional multiphase DC-DC converters face issues with overheating and poor heat dissipation in priority drive phases, leading to frequent output regulation under low load conditions, which can shorten component life.
Innovation Solution
A converter controlling apparatus that measures the heat dissipation properties of each phase and dynamically sets a priority drive phase based on these measurements, prioritizing phases with better heat dissipation to prevent overheating and extend component life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed priority drive phase is used in a multiphase DC-DC converter, then the control structure is simple, but the priority phase is prone to overheat and requires frequent output regulation under low load conditions
Solution Approach 1:
The patent implements dynamic phase switching control where the priority drive phase is not fixed but changes based on operating conditions. The control device determines whether to operate in single-phase or multiphase mode and selects which phase should be the priority phase, allowing the system to adapt to varying load conditions and heat dissipation requirements, thereby preventing overheating while maintaining manageable control complexity
Solution Approach 2:
The patent changes the operational parameters of the DC-DC converter by switching between different phase configurations (single-phase vs. multiphase) and adjusting which phase serves as the priority phase. This parameter change allows optimization of heat dissipation characteristics under different operating conditions without requiring a complete redesign of the control structure
2Temperature
If output regulation is frequently imposed under low load conditions, then the priority phase overheating is prevented, but component life is shortened
Solution Approach 1:
The patent applies preliminary action by proactively selecting the priority drive phase based on predicted or measured heat dissipation characteristics before overheating occurs. The control device monitors or evaluates the heat dissipation property of each phase and pre-determines which phase should handle the load, preventing the need for frequent emergency output regulation and thereby extending component life
Solution Approach 2:
The patent implements feedback control by monitoring the heat dissipation property of each phase and using this information to adjust the priority phase selection. This feedback mechanism allows the system to respond to actual thermal conditions, preventing overheating while avoiding unnecessary output regulation that would shorten component life
3Use of energy by moving object
If single phase drive is used under low load conditions, then power consumption is reduced, but the single phase may overheat if it is the priority phase
Solution Approach 1:
The patent changes the operational parameter of which phase is active under low load conditions. Instead of always using a fixed priority phase, the system dynamically selects which phase should be the priority phase based on heat dissipation characteristics, allowing single-phase operation to maintain low power consumption while preventing the active phase from overheating
Data Source
AI summary
A load variation detecting section determines whether or not the actual load variation falls below a load variation threshold stored in a memory. If a load variation detecting section determines that a specific time period (for example, one minute) has elapsed since the actual load variation fell below a load variation threshold, a power supply section applies same power to reactors for the respective phases. On the other hand, a heat dissipation property calculating section measures temperature-rise rates of the elements for the respective phases, ranks the rates in order from the one having a higher heat dissipation property, and notifies the priority drive phase determining section of the result. A priority drive phase determining section chooses a phase having the highest heat dissipation property as a priority drive phase.