Inverter circuit free from power-source-voltage fluctuation

摘要

An inverter circuit (24) includes a bridge circuit consisting of a plurality of pairs of a high-side switching element (T1, T3, T5) and a low-side switching element (T2, T4, T6), a command signal processing section (50), a pulse generating section (56) for generating pulse signals to control the inverter bridge circuit according to the command signal to have a dead time to prevent short circuiting of the dc power source and a command signal compensation section (54). The compensation section (54) modifies the command signal according to a current voltage level of the dc power source to control the dead zone, thereby preventing deformation of ac output power of the bridge circuit.