A type of AC adjustable frequency drive that
controls the voltage and frequency to the motor
to produce variable speed operation. A VVI type
drive controls the voltage in a section other than
the output section where frequency generation
takes place. The frequency control is
accomplished by an output bridge circuit which
switches the variable voltage to the motor at the
desired frequency.
controls the voltage and frequency to the motor
to produce variable speed operation. A VVI type
drive controls the voltage in a section other than
the output section where frequency generation
takes place. The frequency control is
accomplished by an output bridge circuit which
switches the variable voltage to the motor at the
desired frequency.
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