High Speed and Optically Isolated Communication Unit for System Sampling in Power Electronic Building Blocks
2014
The reliability of Sampling and Transmitting Units (STU) are of great significance in power electronic systems. In order to reduce the sampling interruption, an FPGA-based and optic-isolated communication unit is proposed. The design philosophy and highlights of this method are described in detail. The sampled data is transmitted and received in digital mode in the STU. This unit realizes multi-channel sampling and supports simultaneous decoding of multiple fibers. It is pointed out that applications of this unit have practical value and excellent performance in isolation and transient properties in complicated power electronic systems. Waveforms and propagation delay between two nodes are presented by experimental result. The feasibility of the system design is shown through capacity calculations.
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