MOTOR CONTROL SYSTEM AND ITS METHOD WITH POWER LINE COMMUNICATION

摘要

PURPOSE: A motor driving system and method are provided to transfer electricity and a data signal using pulse width or pulse period modulation methods and to reduce a transferring error of the data signal due to an electric noise. CONSTITUTION: A semiconductor switching element(201) switches power lines(210,211) for supplying power to a direct current(200) and a load side. A switching modulation controller(202) controls the semiconductor switching element using a switching method. A power side power line communications part(203) is connected to the switching modulation controller. A diode(220) secludes reverse voltage from the load side to a power side. A condenser(221) is connected between a cathode terminal of the diode and a ground of the power line. A motor driving power circuit(222) drives a motor(223). A sensor signal coding part(227) codes a sensor signal from a sensor(224). A load side power line communications part(225) transmits and receives with the power side power line communications part.