Interleaved DC Power Supply Channel Activation Control
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Solution Overview
Problem
Interleaved n-cell DC switching power supplies with resonant circuits face efficiency degradation at varying power levels due to fixed power losses in resonant elements, leading to reduced efficiency when operating below full power capacity.
Innovation Solution
A control device dynamically activates or inhibits conversion channels based on the power level processed by the power supply, using a calculation circuit to determine the number of active channels and generate corresponding control signals to optimize channel activation and minimize thermal losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If all conversion channels are activated continuously, then full power capacity is available, but fixed power losses increase at lower power operations
Solution Approach 1:
The control device dynamically adjusts the number of active conversion channels based on the actual power level processed by the power supply. This dynamic adaptation allows the system to maintain full power capacity when needed while reducing fixed power losses at lower power operations by deactivating unnecessary channels.
Solution Approach 2:
The patent changes the operational parameter of the number of active channels from a fixed value to a variable parameter that depends on the power level. This parameter change enables the system to optimize the balance between power capacity and fixed power losses by adjusting the number of active channels according to operating conditions.
2Loss of energy
If the number of active channels is reduced at lower power levels, then fixed power losses are minimized, but power processing capability is limited
Solution Approach 1:
The system dynamically adjusts the number of active channels based on the power level processed, allowing it to minimize fixed power losses at lower power levels by reducing the number of active channels, and to increase power processing capability when needed by activating more channels. This dynamic adjustment resolves the contradiction between minimizing losses and maintaining capability.
Solution Approach 2:
The control device uses feedback about the power level processed by the power supply to determine the optimal number of active channels. This feedback mechanism allows the system to automatically adjust its configuration to minimize fixed power losses while maintaining adequate power processing capability for the current operating conditions.
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 approach enhances efficiency by reducing fixed power losses and optimizing channel activation, maintaining high efficiency across varying power levels, including at lower power operations where traditional resonant structures perform poorly.
Implementation Method 1
the switching switch S is placed in a resonant circuit, represented schematically by a simple rectangle referenced 10 on the figure 2
Implementation Method 2
The transfer of energy from the input to the output occurs via the energy storage element, which stores the energy and then releases it at the rate of switching the switch to the open state and the closed state
Implementation Method 3
The present invention relates to a system for powering a load comprising a fuel cell
Data Source
Figure 1a~1c
Figure 2
Figure 3
AI summary
According to the invention, in a power supply with n interlaced BCi conversion cells, a control device activates m paths among the n paths, with 1= m= n, based on the power (PA) or the current handled by said power supply. The cell may have a boost, buck, buck/boost, Cuk, or SEPIC topology. The invention can be used in fuel cells.