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In this paper, an AC current sensorless control scheme of three-phase PWM rectifier is proposed. A method for reconstructing the AC currents from the DC-link current and switching state is given. A method of modifying the switching state of PWM rectifier is given when the input currents cannot be reconstructed. The control system based on SVPWM includes two PI controllers which are used to regulate...
This paper proposes an AC current sensorless control strategy for a PWM rectifier under the unbalanced source voltage. In the unbalanced system, if we use the traditional control scheme, it will yield large input current harmonics and dc-link voltage ripples due to the effect of the negative components. Meanwhile, in the ordinary control methods, at least two current sensors are needed to test the...
This paper proposes an AC current sensorless control strategy for a PWM rectifier under the unbalanced source voltage. In the unbalanced system, if we use the traditional control scheme, it will yield large input current harmonics and dc-link voltage ripples due to the effect of the negative components. Meanwhile, in the ordinary control methods, at least two current sensors are needed to test the...
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