CONTROL SYSTEM FOR INVERTER-DRIVEN PUMP

摘要

PURPOSE: To prevent reduction of quality of a commercial source by suppressing leakage of high harmonic noise even when an inverter-driven pump to generate high harmonic noise is used as a commercial source through a power line and to ensure power line conveyance by suppressing entrance of high harmonic noise from the commercial source side to the power line. CONSTITUTION: A control system for inverter-driven pump comprises an inverter- driven pump 3; a conveyance signal coupling means 4 to transmit in a superimposing state the operation state of the inverter-driven pump 3 as a conveyance signal to a power line 2; a conveyance signal coupling means 5 to arranged in a position spaced away from the conveyance signal coupling means and coupled to the power line 2 to receive the conveyance signal; and a filter means 6 arranged between a commercial source 1 and a coupling means to receive a conveyance signal and damping the high harmonic component of an inverter and the frequency component of a conveyance signal. The operation state of the inverter-driven pump 3 is monitored and controlled by means of a conveyance signal.