Hewlett-packard Development Company, L.p.

Hyoungil Kim

Yong-Ho You

Minkeun Song

Kiho Park

Ji-Young Byun

An image forming apparatus is provided. The image forming apparatus includes a print engine to perform an image forming job, a motor to drive the print engine, a driving circuit, to supply a power to the motor, and including a sensor to sense an amount of current of the power supplied to the motor, and a processor to analyze a frequency component of the current supplied to the motor by using the amount of current sensed by the sensor for a predetermined time, and to determine an occurrence of a jam based on the analyzed frequency component.

Jam detection of image forming apparatus based on size of motor current

An image forming apparatus includes a print engine, a DC motor, a driving circuit, and a processor. The print engine forms an image. The DC motor drives the print engine. The driving circuit provides a current to the DC motor, and senses a variation of the current provided to the DC motor. The processor calculates a temperature of the DC motor based on the variation of the current flowing through the DC motor, and controls an operation of the image forming apparatus based on the calculated temperature.

Temperature estimation of DC motor based on sensing voltage

An image forming apparatus and an image forming method are provided. The image forming apparatus includes a printing engine to form an image, a step motor to drive the printing engine, a driving circuit to provide a constant current to the step motor and sense a voltage corresponding to a magnitude of the constant current provided to the step motor, and a processor to calculate a temperature of the step motor based on the voltage sensed by the driving circuit during an excitation period of the step motor and control an operation of the image forming apparatus based on the calculated temperature.

Temperature estimation of step motor based on sensing voltage thereof

An image forming apparatus is provided. The image forming apparatus includes a print engine to be used to perform an image forming job, a motor to start the print engine, a driving circuit to supply a power to the motor and to include a sensor to sense a size of current of the power supplied to the motor during an operation to perform the image forming job, and a processor to detect an occurrence of jam based on a size of current sensed by the sensor in a first time interval while the motor is driven and a size of current sensed by the sensor after a determined time from the first time interval.

Growing community of inventors

Suwon-si, South Korea

Hyoungil Kim