Image forming apparatus including a boosting-step-down transformer and power control method
AssigneeRicoh Company, Ltd.
InventorMasahide Nakaya
Life of this patent
Estimating the term…
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.
Claims8
An image forming apparatus comprising:
- an auxiliary power supply unit including a charging element that is charged by a power supplied from a main power supply unit;
- and
- a boosting-step-down transformer that is provided in the auxiliary power supply unit and transforms a power output from the charging element, wherein
- a power output from a secondary coil of the boosting-step-down transformer and a power supplied from the main power supply unit without passing through the charging element are added on a current path, and
- the image forming apparatus further includes a device to which the added power is supplied from the current path.
An image forming apparatus comprising:
- an auxiliary power supply unit including a charging element that is charged by a power supplied from a main power supply unit;
- and
- a boosting-step-down transformer that is provided in the auxiliary power supply unit and configured to transform a power output from the charging element, wherein
- a circuit of a secondary coil of the boosting-step-down transformer is directly or magnetically connected to a circuit and configured to supply the power supplied from the main power supply unit
- a power output from the secondary coil of the boosting-step-down transformer and a power supplied from the main power supply unit without passing through the charging element are added on a current path, and
- the image forming apparatus further includes a device to which the added power is supplied from the current path.
Dependencies are inferred from the claim text.