Power Converter Communication Split for Fast Low-Cost Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing power conversion devices using wireless communication for controlling unit converters face challenges in swift control due to slower communication speeds compared to optical communication, leading to increased costs when multiple optical fibers are required for high-speed communications.
Innovation Solution
A power conversion device that employs an optical fiber for transmitting switching commands to unit converters and a wireless communication channel for transmitting condition information, allowing for swift control without increasing costs by optimizing data transmission pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wireless communication is used to transmit command values to unit converters, then cost is reduced, but control speed decreases
Solution Approach 1:
The communication system is segmented into two distinct channels: optical fiber communication for high-speed command transmission and wireless communication for condition data transmission. This segmentation allows each channel to be optimized for its specific function, with optical fiber handling time-critical control commands and wireless handling less time-sensitive monitoring data, thereby resolving the contradiction between cost and control speed.
2Reliability
If multiple optical fibers are used to transmit large amounts of data, then communication quality improves, but cost increases
Solution Approach 1:
Different communication quality levels are applied to different data types: high-quality optical fiber communication is used for command transmission where reliability is critical, while lower-quality wireless communication is sufficient for condition data transmission. This local quality differentiation maintains communication quality where needed while reducing overall system cost.
Data Source
AI summary
A power conversion device converts power between a direct-current (DC) circuit and an alternating-current (AC) circuit. The power conversion device includes a power converter circuit which includes a plurality of unit converters connected in series, and a controller. The unit converter includes one or more switching elements and a capacitor. The controller transmits, to the unit converter through a first transmission medium, information on a switching command for the unit converter. The unit converter transmits, to the controller through a second transmission medium, information on at least one condition of the unit converter. The first transmission medium is an optical fiber, and the second transmission medium is a wireless communication channel.