Question

In a variable-speed drive with a conventional AC/DC/AC power electronics converter consisting of a 3-phase diode bridge rectifier and a 3-phase Transistor (IGBT) inverter: (a) Voltage control is achieved in

the DC link (b) Frequency control is done by the rectifier (c) Both voltage and frequency are controlled by the inverter (d) Both (b) and (c) are true (e) None of the above

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