Inverter device

摘要

It is an object of the present invention to provide an inverter device (1) which can obtain an initial position of a rotor (83) accurately, and the control device (10) records, in advance, a current data table which specifies relationships between currents in respective phases in a three-phase motor (82) and rotation angles of a rotor (83) of the three-phase motor (82), obtains, from the current data table, a rotation angle of the rotor (83) of the three-phase motor (82) corresponding to a current in each phase in the three-phase motor (82) detected by a current sensor (8 or 9) before driving of the three-phase motor (82), and obtains an initial position of the rotor (83).