Power Converter Modulation Sequence for Laser Voltage Matching
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Solution Overview
Problem
High voltage power supply systems face challenges in efficiently providing power to multiple lasers with distinct voltage requirements, leading to increased costs and space requirements due to the need for separate power supplies.
Innovation Solution
A power converter comprising a transformer, switching bridge circuit, resonant tank circuit, and controller using phase shift modulation switching cycles to control switches into conduction and non-conduction modes, allowing for flexible voltage output adjustment by varying the delay between switching cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate power supplies are used for each laser with distinct voltage requirements, then each laser receives tailored power, but cost and space requirements increase
Solution Approach 1:
A single power supply unit is designed to serve multiple lasers with different voltage requirements by dynamically adjusting its output voltage. The controller modifies switching parameters to deliver tailored power to each laser sequentially, eliminating the need for separate power supplies for each laser while reducing overall space requirements.
Solution Approach 2:
The power supply employs dynamic voltage adjustment through variable switching frequencies and duty cycles. The controller continuously adapts the output voltage based on which laser is currently active, enabling one power supply to cater to multiple voltage requirements without requiring separate fixed-voltage power supplies.
2Adaptability or versatility
If separate power supplies are used for each laser with distinct voltage requirements, then each laser receives tailored power, but cost increases
Solution Approach 1:
The patent implements a universal power supply design that can be manufactured as a single unit to replace multiple specialized power supplies. By integrating voltage adjustment capabilities and laser selection control into one device, the system reduces component count and manufacturing complexity, thereby lowering overall cost.
3Power
If conventional switching modulation is used, then power conversion is achieved, but switching losses and peak currents increase
Solution Approach 1:
The power supply utilizes periodic switching cycles with variable frequency control. By adjusting the switching frequency and duty cycle periodically, the controller optimizes power transfer efficiency and reduces peak current demands on the switching components, thereby minimizing switching losses while maintaining effective power conversion.
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 solution enables efficient power delivery to lasers with varying voltage needs using a single power supply, reducing costs and space requirements while minimizing switching losses and peak currents.
Implementation Method 1
The resonant tank circuit includes an inductor and a capacitor
Implementation Method 2
The transformer includes a primary winding coupled to a primary side of the power converter and a secondary winding coupled to a secondary side of the power converter
Data Source
AI summary
A power converter includes a transformer, a switching bridge circuit, a resonant tank circuit, an output rectifier, and a controller. The switching bridge circuit includes a plurality of switches, each switch controllable into a conduction mode and into a non-conduction mode. The controller is configured to control the plurality of switches based on a series of phase shift modulation switching cycles, each cycle comprising a control period and a delay period. During the control period, the controller causes the conduction mode of each switch of the plurality of switches to overlap a portion of each conduction mode of two other switches. During the delay period, the controller controls all of the switches into non-conduction modes overlapping in time.