Conversion apparatus, device, and control method

A conversion apparatus comprising:

• a conversion module having two phases, each of which includes a converter capable of performing a voltage conversion of an electric power discharged from or charged in a power source and a sensor for detecting a current value of a phase current flowing in the converter, wherein the two phases are electrically connected in parallel;
• and
• a controller for controlling two converters respectively according to a control signal generated based on a predetermined duty ratio, wherein
• the controller includes:
• a first determination unit for determining a basic duty ratio common to all of the plurality of phases, so that an output of the conversion module becomes equal to a target voltage or a target current;
• a second determination unit for determining a correction duty ratio including at least one positive value and at least one negative value and correcting the basic duty ratio for each of the two converters;
• and
• a generator for generating the control signal based on the basic duty ratio and the correction duty ratio, wherein
• the second determination unit determines the correction duty ratio based on a difference between a plurality of phase currents respectively flowing in the two converters, and
• the basic duty ratio is equal to or greater than an absolute value of the correction duty ratio.

A control method of a conversion apparatus including a conversion module having a plurality of phases, each of which includes a converter capable of performing a voltage conversion of electric power discharged from or charged in a power source and a sensor for detecting a current value of a phase current flowing in the converter, in which the plurality of phases are electrically connected in parallel, and a controller for controlling a plurality of converters respectively according to a control signal generated based on a predetermined duty ratio, the control method comprising:

• determining a basic duty ratio that is common to all of the plurality of phases so that an output of the conversion module becomes equal to a target voltage or a target current;
• determining individual correction duty ratios with respect to the plurality of converters based on a difference among a plurality of phase currents flowing in the plurality of converters respectively, wherein the correction duty ratio includes at least one positive value and at least one negative value and an absolute value of the correction duty ratio is equal to or less than the basic duty ratio;
• and
• generating the control signal based on the basic duty ratio and the correction duty ratio.

A control method of a conversion apparatus including a conversion module having two phases, each of which includes a converter capable of performing a voltage conversion of electric power discharged from or charged in a power source and a sensor for detecting a current value of a phase current flowing in the converter, wherein the two phases are electrically connected in parallel, and

• a controller for controlling the two converters respectively according to a control signal generated based on a predetermined duty ratio, the control method comprising:
• determining a basic duty ratio that is common to the two phases so that an output of the conversion module becomes equal to a target voltage or a target current;
• determining individual correction duty ratios with respect to the two converters based on a difference between two phase currents flowing in the two converters respectively, wherein the correction duty ratio includes at least one positive value and at least one negative value and an absolute value of the correction duty ratio is equal to or less than the basic duty ratio;
• and
• generating the control signal based on the basic duty ratio and the correction duty ratio.