POWER CONVERSION APPARATUS AND REFRIGERATION AIR-CONDITIONING APPARATUS

摘要

Provided is a power converter for converting electric power between a power source and a load, including: a boosting device including a boost rectifier configured to prevent a backflow of a current from the load side to the power source side, the boosting device being configured to change a voltage of electric power supplied from the power source to a predetermined voltage; a commutation device configured to perform a commutation operation of directing a current flowing through the boosting device to another path; and a controller configured to perform control related to the voltage change of the boosting device and control related to the commutation operation of the commutation device, in which the commutation device is configured to flow, when the commutation device performs the commutation operation, a current generating a voltage causing reverse recovery of the boost rectifier to the commutation device side.

主权项

1. A power converter for converting electric power between a power source and a load, comprising:
a voltage changing device including a rectifier configured to prevent a backflow of a current from the load to the power source, the voltage changing device being configured to change a voltage of electric power supplied from the power source to a predetermined voltage; a commutation device configured to perform a commutation operation of directing a current flowing through the voltage changing device to another path; and a controller configured to perform control related to the voltage change of the voltage changing device and control related to the commutation operation of the commutation device, wherein the commutation device is configured to direct, when the commutation device performs the commutation operation, a current generating a voltage causing reverse recovery of the rectifier to the commutation device, wherein the commutation device includes a transformer configured to apply a voltage, induced by a current flowing through a primary-side winding of the transformer, to a secondary-side winding of the transformer on the other path, and wherein a turns ratio between the primary-side winding and the secondary-side winding of the transformer is adjusted so that the current generating the voltage causing the reverse recovery of the rectifier flows through the commutation device while making a return current flowing on a side of the primary-side winding smaller than a current capacity of each element connecting to the primary winding.