| 摘要 |
PURPOSE:To eliminate inconveniences due to the laying of a signal transmission line and at the same time conquer difficulty due to surrounding environment such as generation of noise by performing radio transmission of a rotary drive control signal for a variable speed drive electric motor to the receiver part at the side to be controlled from the transmitter part of a control side by the spectrum diffusion communication system. CONSTITUTION:A VSD radio device 10 consists of a transmitter part 12 laid out at the side of a central control center 11 and a receiver part 22 laid out at the side of a facility 21 to be applied and the radio transmission of a control signal for a variable drive electric motor 24 to be controlled is performed by the spectrum diffusion communication system. Then, a VSD controller 23 for inputting each control signal received by the receiver part 22 is provided at the facility 21 to be applied to perform various kinds of control operations for the variable drive electric motor 24 to be controlled, thus eliminating various kinds of inconveniences due to the laying of the signal transmission line in the case of a wired communication system and at the same time easily conquering the difficulty due to the surrounding environment such as generation of noise in the facility 21 to be applied. |
