| 摘要 |
PURPOSE:To use the motor tool even in a region having different, power frequency by changing over computer programmes of every mutually different power frequency in response to the power frequency. CONSTITUTION:DC voltage from a constant-voltage power circuit 5, output corresponding to the number of revolution of a motor 1 from a revolution number detector 4, output for synchronism from a power frequency detecting circuit 8 and clock pulses such as 2.4MHz pulses generated from a reference time generator CPG1 are inputted 7 to a microcomputer MCPU6. The terminals for 50Hz and 60Hz of the programme, in which both operational characteristics of 50Hz and 60Hz are equalized respectively, using the number of clock pulses per a half cycle as 24,000 pulses and 20,000 pulses respectively at the time of 50Hz and 60Hz power frequency are mounted to an output port 9 of the MCPU6, and connected to a change-over switch SW2. The output on-off controls the transistors Tr1, Tr2 of Darlington connection while phase-controlling a trigger time point of a Triac TR11. |
