Multi-Source Rectifier Power Supply With Capacitor Storage
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Solution Overview
Problem
Existing power supply systems for critical devices require complex and costly switching circuitry to switch between multiple AC sources quickly, ensuring continuous operation, which is expensive and space-consuming.
Innovation Solution
A power supply system that includes multiple rectifier circuits with power factor correction (PFC) and storage units, such as capacitors, to store and distribute DC power from multiple AC sources, eliminating the need for relays and enabling scalable and cost-effective redundant power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple AC sources with switching circuitry are used to ensure continuous power, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple rectifier outputs directly to a common DC bus without traditional switching circuitry. The rectifiers operate in parallel, with their outputs merged at the DC bus, eliminating the need for complex AC switching mechanisms while maintaining continuous power supply capability.
Solution Approach 2:
The patent replaces mechanical relay-based switching with electronic circuitry. Diodes and control logic electronically manage power flow between multiple AC sources and the DC bus, eliminating mechanical moving parts and associated complexity while improving reliability.
2Reliability
If relay-based switching circuitry is used to switch between AC sources, then continuous operation is maintained, but monetary cost and space consumption increase
Solution Approach 1:
The patent eliminates mechanical relays by using diode-based rectifier circuits and electronic control. The diodes provide automatic directional control of current flow, replacing mechanical switching mechanisms and reducing both component cost and assembly complexity.
Solution Approach 2:
The rectifier circuits automatically manage power flow from multiple AC sources to the common DC bus without requiring complex external control systems. The circuitry itself performs the switching function through inherent electronic characteristics, reducing the need for additional control components.
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 provides reliable and continuous power to devices by simplifying the switching process, reducing costs, and allowing for scalable solutions without the need for expensive relay-based systems.
Implementation Method 1
a first rectifier circuit configured to receive a first AC input and to generate a first DC output, a second rectifier circuit configured to receive a second AC input and to generate a second DC output
Implementation Method 2
a storage unit (e.g., a capacitor) configured to store charge from both the first DC and the second DC outputs. The storage unit can itself be configured to supply that stored charge as DC power
Implementation Method 3
the PFC circuit includes one or more circuit elements configured to place or maintain an applied input voltage and current in phase with one another
Implementation Method 4
a first electromagnetic interference (EMI) filter configured to receive and filter power supplied by each AC input to its respective rectifier (e.g., PFC) circuit
Data Source
AI summary
The invention provides, in some aspects, a power supply that includes a first rectifier circuit configured to receive a first AC input and to generate a first DC output, a second rectifier circuit configured to receive a second AC input and to generate a second DC output, and a storage unit (e.g., a capacitor) configured to store charge from both the first DC and the second DC outputs. The storage unit can itself be configured to supply that stored charge as DC power, e.g., to a computer or other coupled device.