Power Supply Bus Circuit With Impedance Isolation
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Solution Overview
Problem
Existing power supply bus circuits face challenges in ensuring a constant voltage output due to difficulties in synchronizing time-varying PWM signals for NMOS transistors in DC-DC conversion circuits, leading to inconsistent power input and voltage stability issues for load modules.
Innovation Solution
A power supply bus circuit incorporating a voltage regulator circuit, impedance isolation circuit, and voltage adjustment circuit, where the voltage regulator outputs a constant direct current signal to the impedance isolation circuit, allowing for independent control of PWM signals and ensuring a constant voltage input, thereby stabilizing the power supply to load modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time-varying PWM signals are used to control NMOS transistors in DC-DC conversion circuit for voltage transformation, then voltage adjustment capability is improved, but signal synchronization difficulty increases
Solution Approach 1:
The patent divides the power supply system into three independent functional modules: voltage regulator circuit, impedance isolation circuit, and voltage adjustment circuit. Each module operates with its own control signals and can be independently optimized, eliminating the need for complex time-varying PWM signal synchronization across the entire system while maintaining voltage adjustment capability.
Solution Approach 2:
The impedance isolation circuit acts as an intermediary between the voltage regulator circuit and voltage adjustment circuit. It provides galvanic isolation and impedance matching, allowing the upstream voltage regulator to output stable DC voltage without being directly coupled to the downstream voltage adjustment circuit's switching signals, thereby simplifying control signal requirements.
2Stability of the object's composition
If multiple PWM signals are coordinated to control multiple NMOS transistors, then power input stability is improved, but control signal coordination complexity increases
Solution Approach 1:
The control system is segmented into independent control domains for each functional module. The voltage regulator circuit has its own control signals, the impedance isolation circuit has its own control signals, and the voltage adjustment circuit has its own control signals. This segmentation eliminates the need for complex coordination between multiple PWM signals while maintaining power input stability through each module's independent regulation.
Solution Approach 2:
The impedance isolation circuit serves as a mediator that decouples the control signals between the voltage regulator circuit and voltage adjustment circuit. By providing galvanic isolation and impedance matching, it allows stable power transmission without requiring synchronized control signals across the boundary, significantly reducing control signal coordination complexity.
3Adaptability or versatility
If DC-DC conversion circuit performs voltage transformation from 36V to 72V, then voltage compatibility is improved, but design cost and efficiency loss increase
Solution Approach 1:
The voltage transformation function is segmented across multiple stages: the voltage regulator circuit handles the initial voltage stabilization, the impedance isolation circuit provides galvanic isolation and impedance matching, and the voltage adjustment circuit performs the final voltage adaptation. This segmentation allows each stage to use simpler, more cost-effective components while achieving the overall voltage compatibility from 36V to 72V.
Solution Approach 2:
The impedance isolation circuit acts as an intermediary that enables voltage transformation without requiring complex high-voltage DC-DC conversion components. By providing galvanic isolation and impedance matching, it allows the system to achieve voltage compatibility through simpler isolation and adjustment stages rather than expensive and less efficient direct DC-DC 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
This configuration ensures a constant voltage output to load modules, reducing design complexity and costs, and enhancing power supply stability by decoupling the control signals for the voltage regulator and impedance isolation circuits.
Implementation Method 1
adjusts the direct current signal of the first preset voltage to an isolated direct current signal through a transformer
Data Source
AI summary
A power supply bus circuit, includes a voltage regulator circuit, and an impedance isolation circuit, and further including one or more voltage adjustment circuits, where the voltage regulator circuit receives a direct current signal, adjusts a voltage of the direct current signal to a first preset voltage, and outputs a direct current signal of the first preset voltage to the impedance isolation circuit; the impedance isolation circuit receives the direct current signal of the first preset voltage, adjusts the direct current signal of the first preset voltage to an alternating current signal, and outputs, by using a transformer, the alternating current signal in an isolated way and converts the alternating current signal that is output in an isolated way to an isolated direct current signal, and outputs the isolated direct current signal to the voltage adjustment circuit.