Power supply device, electrical storage device, electric vehicle, and electric power system capable of switching between PFC control and MPPT control

An electrical storage device comprising:

• an input determination section configured to determine which one of a commercial power supply and a power generator is an input power supply, and generate a determination signal,
• wherein the input determination section is configured to receive, as an input voltage, an output voltage of a full-wave rectifier circuit and generate the determination signal based on variation with time in the received output voltage,
• and wherein the input determination section is configured to determine the input power supply to be the commercial power supply, in case of a time period T1 in which the received output voltage is varied form 0 to peak voltage and a time period T2 in which the received output voltage is varied from peak voltage to 0 is equal;
• a conversion section of a switching type configured to convert the input voltage into an output voltage;
• and
• a drive-signal generation section configured to be supplied with determination output from the input determination section, and generate a switching drive signal for the conversion section,
• the drive-signal generation section configured to serve as a power-factor correction control section and generate the switching drive signal in an event that the determination signal indicates that the commercial power supply is the input power supply, and
• the drive-signal generation section configured to serve as a maximum power point tracking control section and generate the switching drive signal in an event that the determination signal indicates that the power generator is the input power supply;
• and
• an electrical storage section configured to serve as a load.

An electric vehicle comprising:

• an electrical storage device including:
• an input determination section configured to determine which one of a commercial power supply and a power generator is an input power supply, and generate a determination signal,
• wherein the input determination section is configured to receive, as an input voltage, an output voltage of a full-wave rectifier circuit and generate the determination signal based on variation with time in the received output voltage,
• and wherein the input determination section is configured to determine the input power supply to be the commercial power supply, in case of a time period T1 in which the received output voltage is varied form 0 to peak voltage and a time period T2 in which the received output voltage is varied from peak voltage to 0 is equal;
• a conversion section of a switching type configured to convert the input voltage into an output voltage, and
• a drive-signal generation section configured to be supplied with determination output from the input determination section, and generate a switching drive signal for the conversion section,
• the drive-signal generation section configured to serve as a power-factor correction control section and generate the switching drive signal in an event that the determination signal indicates that the commercial power supply is the input power supply, and
• the drive-signal generation section configured to serve as a maximum power point tracking control section and generate the switching drive signal in an event that the determination signal indicates that the power generator is the input power supply, and
• an electrical storage section configured to serve as a load.

An electric power system comprising:

• an electrical storage device including:
• an input determination section configured to determine which one of a commercial power supply and a power generator is an input power supply, and generate a determination signal,
• wherein the input determination section is configured to receive, as an input voltage, an output voltage of a full-wave rectifier circuit and generate the determination signal based on variation with time in the received output voltage,
• and wherein the input determination section is configured to determine the input power supply to be the commercial power supply, in case of a time period T1 in which the received output voltage is varied form 0 to peak voltage and a time period T2 in which the received output voltage is varied from peak voltage to 0 is equal;
• a conversion section of a switching type configured to convert the input voltage into an output voltage, and
• a drive-signal generation section configured to be supplied with the determination output from the input determination section, and generate a switching drive signal for the conversion section,
• the drive-signal generation section configured to serve as a power-factor correction control section and generate the switching drive signal in an event that the determination signal indicates that the commercial power supply is the input power supply, and
• the drive-signal generation section configured to serve as a maximum power point tracking control section and generate the switching drive signal in an event that the determination signal indicates that the power generator is the input power supply, and
• an electrical storage section configured to serve as a load.