Zero-additional-hardware power line communication for DC-DC converters
A Power Line Communication (PLC) solution to provide a data link between two or more DC-DC power converters is proposed. The approach does not require additional analog circuitry or high-sample-rate analog-to-digital converters to be added on top of the original system. A modulation and signal injec...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
| Published: |
IEEE
2022
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| Summary: | A Power Line Communication (PLC) solution to
provide a data link between two or more DC-DC power converters is proposed. The approach does not require additional
analog circuitry or high-sample-rate analog-to-digital converters
to be added on top of the original system. A modulation and
signal injection method for the transmitter, and a sampling
and demodulation strategy for the receiver are developed. The
PLC frequency band is placed between the control loop cut-off
frequency and the power electronics circuit cut-off frequency, in a
region that we identify as the ‘intermediate frequency band’. The
transmitter modulates the converter voltage or current output by
injecting perturbations into the control loop at the input to the
PWM unit. To tolerate unsynchronized transmitter and receiver
clocks, a virtual zero-crossing location algorithm is combined
with long/short pulse identification to achieve demodulation at
the receiver. The solution is verified experimentally and achieves
reliable bidirectional PLC communication at 2 kbps with an 8
kHz receiver sampling frequency. |
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