Abstract: An image forming apparatus for forming an image with a fixing member, which fixing member includes a first heating member and a plurality of second heating members is disclosed. The image forming apparatus includes a capacitor, a charging part for charging the capacitor, a first drive part for lighting on/off the first heating member by controlling a first power supply to the first heating member, a second drive part for lighting on/off at least one of the plurality of second heating members by controlling a second power supply to the plurality of second heating members, and a control part for dividing the plurality of second heating members into groups and permitting at least one of the groups to receive the second power supply during a waiting period of the image forming apparatus.

Abstract: A power storage device includes an alternating current (AC) power source, a field effect transistor (FET), a capacitor bank, a direct current (DC) fixing heater, a step-down chopper circuit, and an output control unit. The FET switches between a first path and a second path to supply power from the AC power source in combination with a diode and an IGBT. The capacitor bank is arranged on the first path, and includes capacitor cells. The DC fixing heater is arranged on the second path. The step-down chopper circuit is arranged on the first path, and changes a voltage value of power supplied from the AC power source. The output control unit controls, when power is supplied to the first path, controls the step-down chopper circuit to change a voltage value based on a charging voltage of the capacitor cells.

Abstract: An image forming apparatus for forming an image with a fixing member, which fixing member includes a first heating member and a plurality of second heating members is disclosed. The image forming apparatus includes a capacitor, a charging part for charging the capacitor, a first drive part for lighting on/off the first heating member by controlling a first power supply to the first heating member, a second drive part for lighting on/off at least one of the plurality of second heating members by controlling a second power supply to the plurality of second heating members, and a control part for dividing the plurality of second heating members into groups and permitting at least one of the groups to receive the second power supply during a waiting period of the image forming apparatus.

Abstract: A power storage device includes an alternating current (AC) power source, a field effect transistor (FET), a capacitor bank, a direct current (DC) fixing heater, a step-down chopper circuit, and an output control unit. The FET switches between a first path and a second path to supply power from the AC power source in combination with a diode and an IGBT. The capacitor bank is arranged on the first path, and includes capacitor cells. The DC fixing heater is arranged on the second path. The step-down chopper circuit is arranged on the first path, and changes a voltage value of power supplied from the AC power source. The output control unit controls, when power is supplied to the first path, controls the step-down chopper circuit to change a voltage value based on a charging voltage of the capacitor cells.

Abstract: An image forming apparatus for forming an image with a fixing member, which fixing member includes a first heating member and a plurality of second heating members is disclosed. The image forming apparatus includes a capacitor, a charging part for charging the capacitor, a first drive part for lighting on/off the first heating member by controlling a first power supply to the first heating member, a second drive part for lighting on/off at least one of the plurality of second heating members by controlling a second power supply to the plurality of second heating members, and a control part for dividing the plurality of second heating members into groups and permitting at least one of the groups to receive the second power supply during a waiting period of the image forming apparatus.

Abstract: A power source control apparatus including a capacitor; a charge control circuit for controlling a charger that charges the capacitor; a discharging circuit for discharging power charged in the capacitor to a heating member for heating. The power source control apparatus is shifted to an energy saving mode in which power supply to a part of power loads is stopped when a first condition is satisfied, and the power source control apparatus terminates the energy saving mode when a second condition is satisfied. In the apparatus, the charge control circuit is supplied with power from a power source circuit that supplies power during the energy saving mode.

Abstract: A fixing unit fixes a toner image transferred onto a recording medium to the recording medium by heating and pressurizing the toner image. An auxiliary power supply unit includes a charging element that is charged by a power supplied from a main power supply unit. Each of the main power supply unit and the auxiliary power supply unit supplies a power to the fixing unit. A power control unit controls the main power supply unit and the auxiliary power supply unit, so that the power supplied from at least one of the main power supply unit and the auxiliary power supply unit to the fixing unit is kept sufficient.

Abstract: An image forming apparatus is disclosed that includes a power storage unit. The power storage unit includes a constant voltage generation part configured to generate a constant voltage from a commercial power supply, the constant voltage generation part being connected to an external apparatus operating by consuming power; a voltage increasing circuit configured to increase the constant voltage generated by the constant voltage generation part; a capacitor configured to store an electric charge supplied from the voltage increasing circuit; a circuit control part configured to control charging of the capacitor; and an output part configured to output power stored in the capacitor, the power having a voltage different from the constant voltage.

Abstract: A main controller controls a capacitor charger to charge a capacitor as necessary. A sub-controller controls a power saving mode and stops a power supply to the main controller when shifting to the power saving mode. A charge control circuit compares a terminal voltage of the capacitor with a predetermined value by a comparator circuit. If the terminal voltage is lower than the reference value, an AND circuit takes a logical product of an output signal of the comparator circuit and a power saving signal indicating the shift to the power saving mode, and outputs a control signal indicating an instruction to charge the capacitor, to the capacitor charger.

Abstract: An image forming apparatus includes a fixing section, an energy saving power supply section supplied with power when a power switch is turned on, an energy saving control device activated by the power supplied from the energy saving power supply section, a main power supply source controlled by an on and off operation of an output by the energy saving control device, a main body control device activated by the power supplied by the main power supply source, an energy saving control release device to generate an energy saving control release signal, a fixing control section to control a temperature of the fixing section, a switching device to start and stop supplying the power to the fixing section, and an on and off device to start and stop supplying the power to the fixing control section.

Abstract: In the image formation apparatus, an active filter converts an AC power supply supplied from an AC power supply to a DC voltage, and first and second DC-DC converters convert the DC voltage converted by the active filter to voltages at predetermined levels and respectively supplies the voltages to an image forming engine and an engine control unit. A power supply control unit stops the operation of the first DC-DC converter in order to allow the second DC-DC converter to continue supply of the voltage to the engine control unit when disconnection of the AC power supply is detected.

Abstract: An image forming apparatus includes a fixing section, an energy saving power supply section supplied with power when a power switch is turned on, an energy saving control device activated by the power supplied from the energy saving power supply section, a main power supply source controlled by an on and off operation of an output by the energy saving control device, a main body control device activated by the power supplied by the main power supply source, an energy saving control release device to generate an energy saving control release signal, a fixing control section to control a temperature of the fixing section, a switching device to start and stop supplying the power to the fixing section, and an on and off device to start and stop supplying the power to the fixing control section.

Abstract: A power source control apparatus is disclosed. The apparatus comprises a capacitor; a charge control circuit for controlling a charger that charges the capacitor; a discharging circuit for discharging power charged in the capacitor to a heating member for heating. The power source control apparatus is shifted to an energy saving mode in which power supply to a part of power loads is stopped when a first condition is satisfied, and the power source control apparatus terminates the energy saving mode when a second condition is satisfied. In the apparatus, the charge control circuit is supplied with power from a first power source circuit that supplies power during the energy saving mode.

Abstract: An image forming apparatus for forming an image with a fixing member, which fixing member includes a first heating member and a plurality of second heating members is disclosed. The image forming apparatus includes a capacitor, a charging part for charging the capacitor, a first drive part for lighting on/off the first heating member by controlling a first power supply to the first heating member, a second drive part for lighting on/off at least one of the plurality of second heating members by controlling a second power supply to the plurality of second heating members, and a control part for dividing the plurality of second heating members into groups and permitting at least one of the groups to receive the second power supply during a waiting period of the image forming apparatus.

Abstract: An auxiliary power source device includes: a first battery; a first charger receiving power supply from a commercial power source and charging the first battery; a second battery connected with the first battery in series; a second charger receiving power supply from the commercial power source and charging the second battery; a detecting circuit detecting voltages of the first battery and the second battery; and a control part switching charging operation between the first and second chargers for a final target voltage based on a detection result of the detecting circuit.

Abstract: An image forming apparatus includes a fixing section, an energy saving power supply section supplied with power when a power switch is turned on, an energy saving control device activated by the power supplied from the energy saving power supply section, a main power supply source controlled by an on and off operation of an output by the energy saving control device, a main body control device activated by the power supplied by the main power supply source, an energy saving control release device to generate an energy saving control release signal, a fixing control section to control a temperature of the fixing section, a switching device to start and stop supplying the power to the fixing section, and an on and off device to start and stop supplying the power to the fixing control section.

Abstract: A main controller controls a capacitor charger to charge a capacitor as necessary. A sub-controller controls a power saving mode and stops a power supply to the main controller when shifting to the power saving mode. A charge control circuit compares a terminal voltage of the capacitor with a predetermined value by a comparator circuit. If the terminal voltage is lower than the reference value, an AND circuit takes a logical product of an output signal of the comparator circuit and a power saving signal indicating the shift to the power saving mode, and outputs a control signal indicating an instruction to charge the capacitor, to the capacitor charger.

Abstract: In the image formation apparatus, an active filter converts an AC power supply supplied from an AC power supply to a DC voltage, and first and second DC-DC converters convert the DC voltage converted by the active filter to voltages at predetermined levels and respectively supplies the voltages to an image forming engine and an engine control unit. A power supply control unit stops the operation of the first DC-DC converter in order to allow the second DC-DC converter to continue supply of the voltage to the engine control unit when disconnection of the AC power supply is detected.

Abstract: An image forming apparatus includes a fixing section, an energy saving power supply section supplied with power when a power switch is turned on, an energy saving control device activated by the power supplied from the energy saving power supply section, a main power supply source controlled by an on and off operation of an output by the energy saving control device, a main body control device activated by the power supplied by the main power supply source, an energy saving control release device to generate an energy saving control release signal, a fixing control section to control a temperature of the fixing section, a switching device to start and stop supplying the power to the fixing section, and an on and off device to start and stop supplying the power to the fixing control section.

Abstract: In the image formation apparatus, an active filter converts an AC power supply supplied from an AC power supply to a DC voltage, and first and second DC—DC converters convert the DC voltage converted by the active filter to voltages at predetermined levels and respectively supplies the voltages to an image forming engine and an engine control unit. A power supply control unit stops the operation of the first DC—DC converter in order to allow the second DC—DC converter to continue supply of the voltage to the engine control unit when disconnection of the AC power supply is detected.