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US 10,541,613 B2Granted
Power supply apparatus and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorJun Hirabayashi
Life of this patent
Estimating the term…
Abstract
The power supply apparatus includes an inductor; a switching element connected to another end of the inductor, the switching element configured to drive the inductor by being turned on or turned off in accordance with an input pulse signal; a boost converter circuit connected to both ends of the inductor and including a plurality of rectification units, the boost converter circuit configured to amplify a voltage generated in the inductor, each of the plurality of rectification units including a diode and a capacitor; and a voltage boosting element configured to supply a voltage obtained by boosting an input voltage to the inductor.
Claims17
A power supply apparatus comprising:
- an inductor;
- a boost converter circuit connected to the inductor and including a plurality of rectification units, the boost converter circuit configured to amplify a voltage generated in the inductor, each of the plurality of rectification units including a diode and a capacitor;
- a first switching element connected to a side opposite to a side on which a voltage is supplied into the inductor in series with the inductor, the first switching element configured to drive the inductor by being turned on or turned off in accordance with an input pulse signal;
- a voltage boosting element connected to a side on which the voltage is supplied to the inductor;
- a first capacitance element connected in parallel to the voltage boosting element;
- and
- a second capacitance element connected between the side opposite to the side on which the voltage is supplied into the inductor with regard to the inductor and a ground,
- wherein in a case where the first switching element drives the inductor, a value of a voltage at the side opposite to the side on which the voltage is supplied into the inductor is changed to a first value and a second value smaller than the first value, and a value of a voltage at the side on which the voltage is supplied into the inductor is changed to a third value and a fourth value smaller than the third value, and
- wherein, in a case where the value of the voltage at the side opposite to the side on which the voltage is supplied into the inductor is the second value, the value of the voltage at the side on which the voltage is supplied into the inductor is the third value.
6 more elements
An image forming apparatus comprising:
- an image forming unit configured to form an image on a recording material;
- and
- a power supply apparatus configured to supply electric power to the image forming unit,
- the power supply apparatus including:
- an inductor;
- a boost converter circuit connected to the inductor and including a plurality of rectification units, the boost converter circuit configured to amplify a voltage generated in the inductor, each of the plurality of rectification units including a diode and a capacitor;
- a first switching element connected to a side opposite to a side on which a voltage is supplied into the inductor in series with the inductor, the first switching element configured to drive the inductor by being turned on or turned off in accordance with an input pulse signal;
- a voltage boosting element connected to a side on which the voltage is supplied to the inductor;
- a first capacitance element connected in parallel to the voltage boosting element;
- and
- a second capacitance element connected between a side opposite to the side on which the voltage is supplied into the inductor with regard to the inductor and a ground,
- wherein in a case where the first switching element drives the inductor a value of a voltage at the side opposite to the side on which the voltage is supplied into the inductor is changed to a first value and a second value smaller than the first value, and a value of a voltage at the side on which the voltage is supplied into the inductor is changed to a third value and a fourth value smaller than the third value, and
- wherein in a case where the value of the voltage at the side opposite to the side on which the voltage is supplied into the inductor is the second value, the value of the voltage at the side on which the voltage is supplied into the inductor is the third value.
10 more elements
Dependencies are inferred from the claim text.