Backplane Power Modules With Fixed-Phase Carrier Synchronization
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Solution Overview
Problem
Conventional power conversion systems with a single signal processor controlling multiple power converters experience reduced operating efficiency and increased power loss due to forcibly changed driving processes and dynamic phase differences between power modules.
Innovation Solution
A power conversion apparatus comprising multiple power modules, each with a signal processor and power converter, where the signal processor in one module generates a carrier signal that is sent to and phase-locked by another module to maintain a fixed phase difference, improving efficiency and reducing power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single signal processor controls multiple power converters in parallel, then the device complexity is reduced, but the operating efficiency decreases and power loss increases due to forcibly changed driving processes
Solution Approach 1:
The system divides the control function into separate signal processors for each power module. Each signal processor independently generates carrier signals for its associated power converter, eliminating the need for a single centralized controller and avoiding the associated timing conflicts and efficiency losses.
Solution Approach 2:
The patent introduces a communication mechanism where carrier signals are exchanged between signal processors of different power modules. This intermediary signal transmission allows synchronized control while maintaining independent operation, resolving the conflict between centralized simplicity and distributed efficiency.
2Device complexity
If multiple timers in the same signal processor generate carrier signals for multi-channel power conversion, then the device complexity is reduced, but the phase difference between power outputs becomes dynamic, causing output ripple and thermal stress deterioration
Solution Approach 1:
The system segments the carrier signal generation function from the centralized timer to individual signal processors in each power module. This segmentation allows each module to maintain its own fixed phase relationship, preventing the dynamic phase differences that occur when multiple timers share a common clock source.
Solution Approach 2:
The patent implements a feedback mechanism where carrier signals are transmitted between signal processors, allowing each module to synchronize its operation while maintaining a fixed phase difference. This feedback loop ensures stable phase relationships despite independent operation.
Data Source
AI summary
The embodiments provide a backplane and a power conversion method and apparatus. The power conversion apparatus includes a first power module, a second power module, and a controller. Each power module includes a signal processor and a corresponding power converter. The signal processor in the first power module sends a generated first carrier signal to the signal processor in the second power module. The signal processor in the second power module determines a second carrier signal by using a period of the first carrier signal, to drive the power converter in the first power module by using the first carrier signal, and drive the power converter in the second power module by using the second carrier signal. This improves operating efficiency of a device in a power conversion process and reduces a power loss.