variable speed drive system, a method for operating a variable speed drive system, and a method of cooling a hydrocarbon stream

摘要

Variable employing the motor and a frequency converter disposed between the AC source and the motor It operates the speed drive system. The frequency converter, the AC power source frequency, obtained from an AC power source, functions to convert the conversion power of the variable drive frequency. It is possible to combine the mechanical assembly to the motor. Electrical modulation circuit is provided, it interacts with the frequency converter. This, with any distortions excitation in mechanical assemblies and AC power are independently configured to force the variability in degree between the harmonic frequencies of the generated interharmonic currents in the frequency converter.BACKGROUND 1