| 摘要 |
PURPOSE:To heighten terminal voltage to excessively excite and reduce the capacity of a rectifier circuit by generating hunting on a hysteresis motor temporarily. CONSTITUTION:A hysteresis motor 2 is driven by the output of an inverter 1. The output of a hunting suppressing circuit 31 in a hunting suppressing circuit 3 is inputted to a control circuit 11 as it is in a steady state to suppress hunting. Following the change-over of signal C, the output of the hunting suppressing circuit 31 inverted by a signal inverting circuit 32 is directed to the control circuit 11 to generate the hunting. In this case, energy is regenerated to the inverter 1 by the hunting of the hysteresis motor 2, and the output voltage of the inverter 1 becomes to the voltage equal to or higher than a rated one, and the hysteresis motor 2 is excessively excited. |
