Power converter and refrigerating and air-conditioning apparatus

A power converter comprising:

• voltage varying means for varying an applied voltage to a predetermined voltage;
• commutating means for performing a commutation operation for allowing a current flowing through the voltage varying means to flow through a second path;
• smoothing means for smoothing a voltage related to outputs of the voltage varying means and the commutating means to produce power and supplying the power to a load side;
• a first controller for performing control related to voltage varying by the voltage varying means on the basis of at least one of a voltage and a current related to the voltage varying means;
• and
• a second controller for controlling the commutation operation of the commutating means on the basis of at least one of the voltage and the current related to the voltage varying means.