| 摘要 |
PURPOSE:To heighten setting precision at modulation time by installing a means to compare the detected signal level of a voltage and current detecting means or an input current controlling means with a memorized signal level and to control voltage and current which is applied to parts of a frequency converter and installing a signal sending means to send output correct starting signal. CONSTITUTION:When a prescribed signal is sent from a signal sending means 23 to send an output correct starting signal, an input electric current is controlled to be a prescribed level according to the signal detected by a second input current detecting means 24 outside of an appliance. After that, an output signal level of a first input current detecting means 17 installed in the inside of the appliance or an output signal level of a means to detect voltage and current applied to parts is memorized in a set value memory means 22. Then, output power is controlled by the first detecting circuit 17 in the inside or the applied voltage and current detecting circuit 20 according to the memorized value. By this method, setting of the maximum value is carried out simply, automatically and precisely. |
