| 摘要 |
PURPOSE:To enable to readily discriminate the output frequency and output rotating direction of an inverter by disposing display elements for displaying the states of the gate signals of the inverters in a closed loop. CONSTITUTION:An output pulse display unit 1 in an inverter is composed by disposing light emitting diodes D1(UP)-D6(WN) in a closed loop shape substantially on a circular shape. A gate signal from an inverter controller is applied through light emitting diodes D1-D6 as the display elements of the unit 1 to the switching element of the inverter. The lights emitted from the diodes D1- D6 are rotated, thereby notifying the output frequency and output rotating direction of the inverter by the speeds and the directions of the rotated lights. |
