AC-DC Power Supply Synchronizing Circuitry Mitigating Interference
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Solution Overview
Problem
Existing AC-DC switch mode power supplies suffer from asynchronism among output voltages, leading to slowed system response, electromagnetic interference, and noise when operating in connected units.
Innovation Solution
A synchronizing circuitry that connects a master device with one or more slave devices using existing communication loops through a master control circuit, slave control circuits, and communication interfaces, ensuring synchronous operation and reducing interference and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If AC-DC switch mode power supplies operate in connected units with respective power supplies, then each device can function independently, but asynchronism among output voltages occurs leading to slowed system response and electromagnetic interference
Solution Approach 1:
The patent implements a feedback mechanism where the master controller detects the output voltage of the slave power supply and adjusts its own output voltage accordingly. This feedback loop ensures that the master and slave power supplies operate synchronously, maintaining consistent output voltages and eliminating asynchronism-induced electromagnetic interference and noise.
Solution Approach 2:
The patent introduces a master controller as an intermediary device that coordinates between multiple power supplies. The master controller receives detection signals from the slave controller, processes the information, and generates adjustment signals to synchronize the operation of all power supplies, thereby preventing electromagnetic interference without compromising independent functionality.
2Object-generated harmful factors
If master-slave control is implemented to synchronize power supplies, then electromagnetic interference is mitigated, but additional control circuitry and communication interfaces are required
Solution Approach 1:
The patent designs the master and slave controllers to perform multiple functions. The controllers not only regulate their respective power supplies but also detect output voltages, process synchronization signals, and adjust operating parameters. This multi-functionality reduces the need for separate dedicated synchronization circuitry, thereby limiting the increase in device complexity.
3Ease of operation
If asynchronism is allowed among power supply outputs, then device independence is maintained, but system response is significantly slowed down
Solution Approach 1:
The patent implements preliminary synchronization actions where the master controller pre-adjusts its output voltage based on detected slave output voltage before full operation begins. This preliminary action ensures that when the system operates, the power supplies are already synchronized, maintaining both device independence and fast system response without requiring complex real-time coordination during operation.
Data Source
AI summary
A synchronizing circuitry for AC-DC switch mode power supplies includes a master control circuit connected to one or more slave control circuits through one or more communication interfaces. With the communication interfaces, the master control circuit and the slave control circuits can be connected using existing communication loops, so that when the master control circuit performs master-slave control on the slave control circuits, the slave control circuits have synchronous connection with the master control circuit, thereby mitigating electromagnetic interference that may happen during master-slave control, and effectively reducing noise. As a result, signal transmission is more efficient and master-slave control is more responsive.