Inverter Timing Synchronization via Feedback Control
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Solution Overview
Problem
Existing power converter systems face inefficiencies due to unsynchronized alternating current outputs from multiple inverters, leading to reduced performance and efficiency in applications like head end power systems for rail vehicles, where the combined output can result in interference and noise.
Innovation Solution
A power converter control system that synchronizes the timing of events across multiple inverters using control modules and communication links, allowing for coordinated timing adjustments to achieve synchronized alternating current outputs, thereby improving efficiency and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple inverters are used to provide sufficient power for HEP applications, then the power capacity is improved, but the synchronization of AC outputs deteriorates, causing interference and reduced efficiency
Solution Approach 1:
The control module receives feedback signals from the inverters containing timing information about AC output events (zero crossings, peaks). Based on this feedback, the control module generates correction signals to adjust the timing of each inverter, ensuring synchronized operation. This closed-loop feedback mechanism maintains synchronization while allowing multiple inverters to operate at full power capacity.
Solution Approach 2:
A central control module acts as an intermediary between multiple inverters, coordinating their operation. The control module receives timing information from each inverter, processes this information, and sends adjustment signals back to the inverters to synchronize their AC outputs. This intermediary coordination enables multiple inverters to work together without interference.
2Device complexity
If multiple inverters operate independently, then device complexity is reduced, but system performance deteriorates due to unsynchronized outputs causing interference and noise
Solution Approach 1:
The control module performs multiple functions: it receives timing information from multiple inverters, processes this information to determine synchronization status, generates correction signals, and transmits these signals back to the inverters. This multi-functional approach consolidates control complexity into a single module while maintaining high system efficiency through synchronized operation.
3Object-affected harmful factors
If inverter outputs are synchronized, then interference and noise are reduced, but the timing control complexity increases
Solution Approach 1:
The control module continuously monitors the timing of AC output events from each inverter through feedback signals. Based on this real-time feedback, the module generates appropriate correction signals to adjust inverter timing, ensuring synchronized operation that eliminates interference and noise while maintaining manageable control complexity.
Solution Approach 2:
The patent replaces complex mechanical or manual timing adjustment mechanisms with electronic signal processing. The control module uses electronic feedback signals containing timing information and generates electronic correction signals to adjust inverter operation, substituting sophisticated electronics for simpler mechanical control while achieving precise synchronization.
Data Source
AI summary
A power converter control system includes a first power converter, at least one additional power converter, a first control module, and an additional control module. The first power converter receives direct current and outputs alternating current as a first power output. The additional power converter receives direct current and outputs alternating current as an additional power output. The first control module controls timing of events of the first power converter. The additional control module is associated with the additional power converter and controls timing of events of the additional power converter. The first control module communicates first information regarding the timing of the first power converter to the additional control module. The additional control module is configured to adjust the timing of the additional power converter to correspond with the timing of the first power converter.