Dual-Phase Inverting Buck-Boost Converter Architecture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional inverting buck-boost power converters suffer from low efficiency due to the need for high-voltage rated transistor switches, which result in increased power consumption and manufacturing costs, and are not optimized for varying load current demands.
Innovation Solution
A dual-phase inverting buck-boost power converter architecture that incorporates both inverting buck-boost and boost converters, allowing for dual-phase operation using inductive and capacitive energy storage elements to supply power at moderate and high current levels based on load requirements, utilizing lower voltage rated switches in the boost converter to enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-voltage rated transistor switches are used in conventional inverting buck-boost power converters, then the converter can handle voltage conversion requirements, but power consumption increases and manufacturing costs increase
Solution Approach 1:
The power converter is divided into two separate converters: an inverting buck-boost converter and an inverting boost converter. Each converter uses switches rated for appropriate voltage levels for their specific function, rather than requiring all switches to handle the full voltage range. This segmentation allows low-voltage switches to be used where appropriate, reducing power consumption while maintaining overall voltage handling capability.
Solution Approach 2:
The inverting boost converter is configured to operate in two modes: voltage boost mode and current boost mode. This multi-functionality allows the system to achieve high current output without requiring high-voltage rated switches, as the boost converter can deliver high current at lower voltage levels, thereby reducing power consumption of the switches.
2Power
If high-voltage rated transistor switches are used in conventional inverting buck-boost power converters, then the converter can handle voltage conversion requirements, but manufacturing costs increase
Solution Approach 1:
By segmenting the power converter into two separate converters with specialized functions, each using appropriately rated components, the system avoids the need for expensive high-voltage rated switches in all positions. Low-voltage switches are sufficient for the buck-boost converter, reducing component costs while maintaining voltage handling capability through the combined operation of both converters.
Solution Approach 2:
The inverting boost converter is designed to operate only when additional current or voltage boost is needed, rather than continuously. This selective operation allows the use of simpler, lower-cost switches in the boost converter path, reducing overall manufacturing costs while maintaining performance when needed.
3Device complexity
If a single inverting buck-boost converter is used, then the circuit is simpler, but it cannot efficiently supply power at both moderate and high current levels under varying load conditions
Solution Approach 1:
The control system dynamically selects which converter to operate based on real-time load conditions. The inverting buck-boost converter operates during light to moderate load conditions, while the inverting boost converter is activated during high current demand conditions. This dynamic operation allows the system to adapt to varying load requirements efficiently.
Solution Approach 2:
The control system periodically monitors load conditions and switches between converter operations accordingly. The inverting boost converter operates periodically only when high current output is required, rather than continuously, allowing the system to maintain simplicity during normal operation while providing enhanced capability when needed.
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 dual-phase approach reduces power consumption and manufacturing costs by enabling efficient operation across a range of load conditions, with the inverting buck-boost converter operating at all times and the boost converter only when high current is needed, resulting in improved efficiency and cost-effectiveness.
Implementation Method 1
charging, during a first charging mode, a first inductor by coupling the first inductor to a voltage source and conducting energy from the voltage source to the first inductor
Implementation Method 2
discharging, during a first discharging mode, the first inductor by coupling the first inductor to the output node and conducting energy from the first inductor to the output node
Data Source
AI summary
In an example, a dual-phase inverting buck-boost power converter for use with at least first and second energy storage elements includes an inverting buck-boost power converter and an inverting boost converter. In an example, the inverting buck-boost power converter is coupled between an input node and an output node of the dual-phase inverting buck-boost power converter and includes a first plurality of switches operable to couple to the first energy storage element, wherein the inverting buck-boost power converter is operable to supply a first load current. In an example, the inverting boost converter is coupled in parallel with the inverting buck-boost power converter between the input node and the output node of the dual-phase inverting buck-boost power converter and includes a second plurality of switches operable to couple to the first and the second energy storage elements, wherein the inverting boost converter is operable to supply a second load current.