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This paper introduces a sensorless current-sharing strategy for multiphase input-parallel output-parallel (IPOP) DC-DC converters. A dual active bridge (DAB) DC-DC converter is chosen as the basic DC-DC converter. With this strategy, by perturbing the duty cycles in (n−1) out of n phases in turn and measuring the changes of duty cycles respectively, the parameters mismatches among phases are estimated...
For the control strategy of cascaded multilevel converter based solid state transformer (SST), in order to solve the power unbalanced problem caused by mismatch of the parameters of each dual active bridge (DAB) module, power balance control strategy is proposed. This strategy uses the active power component of the duty cycle of each module of the multilevel rectifier as power feedback to adjust the...
This paper introduces a sensorless current-sharing strategy for two-phase input-parallel output-parallel (IPOP) DC-DC converters. A dual active bridge (DAB) DC-DC converter is chosen as the basic DC-DC converter. With this strategy, the parameter mismatches between phases are estimated by perturbing the duty cycle in one phase and measuring the changes of duty cycles in both phases. Then the duty...
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