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This paper proposes a sliding-mode-based direct power control (DPC) method in a three-phase boost rectifier without the use of a

voltage sensor. This sliding-mode-based DPC is used to improve transient-state response characteristics. This DPC can eliminate

voltage sensors by calculating a voltage using a sensorless method, thus considerably reducing cost. This DPC first presents an

effective algorithm that does not significantly affect the previous performance and does not need a voltage sensor. Thereafter, the

effectiveness of the algorithm is verified by simulations and experiments.