DRIVE CONTROLLER FOR INVERTER

摘要

PURPOSE:To protect a compressor and to increase the reliability of a system by varying data one by one when correcting the timer value of a data unit timer, thereby eliminating a variation in the abrupt output voltage. CONSTITUTION:The first microcomputer 5 generates a carrier period Tphi by its own signal generating means for inputted motor rotating frequency command (f- set), outputs the signal to the second microcomputer 6, and outputs T2 data for the signal of a unit timer T2 formed by the microcomputer 6. The signal inputted to the microcomputer 5 by a power source voltage variation detector 18 is outputted as boost data to the microcomputer 6 to correct the data unit timer T2 timer. At this time, the microcomputer 6 varies T2 data one by one.