PURPOSE: To facilitate work regulating a frequency and enable the frequency, after it is set, to ensure the stability, by providing a frequency setter circuit which changes the set frequency of an AC generator by the level change of a frequency setting voltage signal given to a control circuit.
CONSTITUTION: When a frequency selector switch 27 is placed in an off-condition, high voltage is supplied to a control circuit 26 by voltage input from an input terminal 21, and the circuit 26, deciding a set frequency to be set to 50Hz and calculating the set frequency as 50Hz, outputs a control value corresponding to a driver circuit 38. While if the frequency selector switch 27 is switched to be turned on, the circuit 26, to which low voltage is supplied because the voltage from the input terminal 21 is relieved through the frequency selector switch 27, decides the set frequency to be set to 60Hz and calculated as 60Hz, outputting a control value corresponding to the driver circuit 38. In this way, an engine 41 controls a generator 31 generating an assigned set frequency.
HIRATA MAKIZOU
TAKAHASHI AKIRA
ABE SHINJI
| JP50122813B | ||||
| JPS5728836A | 1982-02-16 | |||
| JP58158136B |