DC Bus Power Conversion for Stable Multi-Voltage Output
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Solution Overview
Problem
Traditional power supply systems for medical imaging devices face challenges in adapting to different voltage levels and frequencies across regions, leading to inefficiencies, waste, and voltage fluctuations due to lack of effective feedback regulation, resulting in adverse effects on device performance.
Innovation Solution
A power supply system comprising a rectifying circuit module, a DC connecting bus module, and a voltage output circuit module, which includes three-phase and single-phase AC voltage output modules, and DC voltage output modules, along with a DC/DC HF isolation transformer, to stabilize and regulate AC and DC voltages independently of input fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional power transformers with multiple input taps are used to match different voltage levels and frequencies, then the power supply system can adapt to different geographical regions, but the device complexity and manufacturing cost increase due to multiple taps and iron core materials
Solution Approach 1:
The patent changes the operating parameters of the power supply system by converting AC input to DC and then using DC-AC conversion circuits to generate AC output at different voltage levels and frequencies. This allows the system to adapt to different geographical regions (110V/220V, 50Hz/60Hz) without requiring multiple iron core materials and taps, as the output parameters are electronically controlled rather than mechanically configured.
Solution Approach 2:
The patent replaces the mechanical/physical approach of using multiple iron core materials and taps with an electronic control approach. The DC-AC conversion circuits use electronic switching and control to generate different voltage levels and frequencies, eliminating the need for physical transformation of multiple transformer configurations.
2Device complexity
If traditional power transformers without feedback regulation are used, then the system structure is simpler, but the output voltage stability deteriorates as it fluctuates with input voltage changes
Solution Approach 1:
The patent implements feedback regulation control mechanisms in the DC-AC conversion circuits. The control circuits monitor the output voltage and adjust the switching parameters to maintain stable output despite input voltage fluctuations. This feedback mechanism ensures that the output voltage remains constant even when input voltage changes, solving the stability problem while maintaining reasonable system complexity.
3Adaptability or versatility
If multiple-tap structures are used in traditional power supply systems, then different voltage levels can be achieved, but the manufacturing cost and system complexity increase unnecessarily
Solution Approach 1:
The patent makes the power supply system universal by using DC-AC conversion circuits that can generate multiple voltage levels and frequencies from a single DC bus. The same conversion circuitry can output 110V, 220V, 50Hz, or 60Hz by changing control parameters, eliminating the need for multiple specialized transformer configurations and reducing manufacturing complexity and cost.
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 system ensures stable and regulated AC and DC voltage outputs, reduces system complexity and cost by eliminating multiple-tap structures, and provides effective feedback control, improving power factor and grounding protection.
Implementation Method 1
the rectifying circuit module is connected with an external power supply to correct and rectify the AC current of the external power supply to form a DC current
Implementation Method 2
the DC connecting bus module is connected with the rectifying circuit module to store the DC current and output a DC voltage
Data Source
AI summary
The application discloses a power supply system and an electronic device. The power supply system includes a rectifying circuit module, a DC connecting bus module and a voltage output circuit module. The rectifying circuit module is connected with an external power supply to correct and rectify the AC current of the external power supply to form a DC current; the DC connecting bus module is connected with the rectifying circuit module to store the DC current and output a DC voltage; the voltage output circuit module is connected with the DC connecting bus module to convert the DC voltage of the DC connecting bus module to at least any of a three-phase AC voltage, a single-phase AC voltage and a target DC voltage and output it.