Voltage Converter Dead Time Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing voltage converters face inefficiencies due to dead times that lead to power loss and reduced conversion efficiency, as the first and second switches being turned on simultaneously can cause short-circuiting, necessitating stabilization through dead times but at the cost of efficiency.
Innovation Solution
The voltage converter employs a first and second switch controller that adjust activation timings based on pulse width modulation signals and switch node voltages, minimizing dead times by advancing or delaying switch activations to prevent short-circuiting and optimize efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dead time is introduced to prevent short-circuiting between switches, then reliability is improved, but energy loss increases and conversion efficiency deteriorates
Solution Approach 1:
The patent implements dynamic dead time adjustment where the dead time period is not fixed but varies based on operating conditions. The controller dynamically modifies the timing between switch turn-off and turn-on events, allowing optimization of the trade-off between reliability and efficiency under different load and voltage conditions.
Solution Approach 2:
The invention changes the parameter of dead time duration based on system state. By monitoring voltage levels, current conditions, and switch states, the controller adjusts the dead time parameter in real-time, transitioning from a static to a variable parameter that adapts to operational requirements.
2Stability of the object's composition
If dead time is extended to ensure complete switch transition, then stability is improved, but conversion efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts dead time duration based on switch transition requirements. Rather than using a fixed conservative value, the controller monitors transition completion and adapts the dead time to be just sufficient for stable switching, maximizing efficiency while maintaining reliability.
Solution Approach 2:
The switching control system uses feedback from the circuit state to self-regulate the dead time period. The controller observes voltage and current conditions during switching transitions and automatically adjusts timing to ensure complete transition without excessive delay, making the system self-optimizing.
3Device complexity
If fixed dead time is used to simplify control, then device complexity is reduced, but energy loss increases
Solution Approach 1:
The patent introduces feedback mechanisms that monitor switch states, voltage levels, and current flow to inform dead time adjustment decisions. This feedback loop allows the controller to optimize dead time based on actual circuit conditions rather than relying on predetermined fixed values, reducing energy loss while maintaining manageable complexity.
Solution Approach 2:
The control system performs self-adjustment of dead time parameters based on observed operating conditions. The controller autonomously modifies timing parameters without requiring external intervention or complex predetermined lookup tables, achieving optimization through self-service operation.
Data Source
AI summary
A voltage converter includes first and second charging elements, first and second switches, and first and second switch controllers. The first switch controller adjusts a first activation timing of a first control signal in response to a pulse width modulation signal, a switch signal, and a first control signal. The first control signal is a signal for controlling the first switch. The second switch controller adjusts a second activation timing of a second control signal in response to the pulse width modulation signal, the first control signal, and a second control signal. The second control signal is a signal for controlling the second switch.