Image forming apparatus calculating power consumption amount

An image forming apparatus controlling method comprising:

• a first power calculating step of calculating a power consumption amount of a first load of said image forming apparatus based on at least one of measured values of a voltage and a current, which are supplied to said first load;
• a power prediction step of predicting a power consumption amount of a second load of said image forming apparatus, including a fixing heater that heats a fixing device, based on an operating state and an operating time of said image forming apparatus;
• and
• a power summing-up step of calculating a power consumption amount of said image forming apparatus by summing up the power consumption amount calculated by said first power calculating step and the power consumption amount predicted by said power prediction step.

An image forming apparatus comprising:

• one or more processors operatively connected to a memory, the memory storing instructions for the one or more processors to:
• calculate a first power consumption amount of a first load group in said image forming apparatus;
• calculate a second power consumption amount of a second load group including a fixing heater;
• calculate a third power consumption amount of a third load group including a control circuit that controls an operation of said image forming apparatus;
• and
• calculate a sum power consumption amount of said image forming apparatus by summing up the first, second and third power consumption amounts, wherein said first load group includes all loads of said image forming apparatus, which are not included in said second and third load groups;
• and
• a DC power supply for supplying power to each of said first and third load groups using a voltage into which a voltage of a commercial power source is converted;
• wherein at least one of the first power consumption amount and the third power consumption amount is calculated based on conversion efficiency of said DC power supply.

An image forming apparatus comprising:

• one or more processors operatively connected to a memory, the memory storing instructions for the one or more processors to:
• calculate a first power consumption amount of a first load group in said image forming apparatus;
• calculate a second power consumption amount of a second load group including a fixing heater;
• calculate a third power consumption amount of a third load group including a control circuit that controls an operation of said image forming apparatus;
• and
• calculate a sum power consumption amount of said image forming apparatus by summing up the first, second and third power consumption amounts, wherein said first load group includes all loads of said image forming apparatus, which are not included in said second and third load groups;
• a peripheral device;
• and
• another DC power supply for supplying power to said peripheral device using a voltage, into which a voltage of a commercial power source is converted, without receiving power from a DC power supply that supplies said power to each of said first and second load groups,
• wherein in calculating the first power consumption amount, the image forming apparatus calculates a power consumption amount of said peripheral device based on the operating state of said peripheral device.

An image forming apparatus controlling method comprising:

• calculating a first power consumption amount of a first load group in said image forming apparatus;
• calculating a second power consumption amount of a second load group including a fixing heater;
• calculating a third power consumption amount of a third load group including a control circuit that controls an operation of said image forming apparatus;
• and
• calculating a sum power consumption amount of said image forming apparatus by summing up the first, second and third power consumption amounts;
• wherein said first load group includes all loads of said image forming apparatus, which are not included in said second and third load groups;
• wherein said image forming apparatus comprises a DC power supply for supplying power to each of said first and third load groups using a voltage into which a voltage of a commercial power source is converted;
• and
• wherein at least one of the first power consumption amount and the third power consumption amount is calculated based on conversion efficiency of said DC power supply.

A non-transitory computer-readable recording medium having a control program for an image forming apparatus stored thereon, said program being executable to control a computer to perform functions comprising:

• calculating a first power consumption amount of a first load group in said image forming apparatus;
• calculating a second power consumption amount of a second load group including a fixing heater;
• calculating a third power consumption amount of a third load group including a control circuit that controls an operation of said image forming apparatus;
• and
• calculating a sum power consumption amount of said image forming apparatus by summing up the first, second and third power consumption amounts;
• wherein said first load group includes all loads of said image forming apparatus, which are not included in said second and third load groups;
• wherein said image forming apparatus comprises a DC power supply for supplying power to each of said first and third load groups using a voltage into which a voltage of a commercial power source is converted;
• and
• wherein at least one of the first power consumption amount and the third power consumption amount is calculated based on conversion efficiency of said DC power supply.