Converter control device and control method, and air conditioner

摘要

The purpose of the present invention is to satisfy harmonics specifications and enhance a power factor without using an expensive phase detection circuit, or the like. A converter control unit (15) is provided with a phase correction unit (40) for calculating a phase correction value for correcting a phase calculated on the basis of a zero-cross signal. The phase correction unit (40) sets a form factor leading to a power factor of a prescribed value or greater as a target form factor, retains information associating target form factors and input currents beforehand, acquires a target form factor corresponding to an input current value from the information, and sets a phase correction value for causing a form factor to approach the target form factor.