Abstract:
A phase controlling device of reduced cost, a fuser controlling device including the phase controlling device, and a phase controlling method. The phase controlling device includes: a first signal generating unit generating an error signal that corresponds to a difference between the reference temperature of the fuser and the actual temperature of the fuser; a pulse generating unit generating a sawtooth wave pulse signal that increases with time during a half period of the AC power; and a control signal generating unit comparing the error signal and the sawtooth wave pulse signal and outputting a phase control signal controlling phase of the AC power. The pulse generating unit generating an increasing sawtooth wave pulse may have a relatively simple circuit configuration relative to that of the pulse generating unit generating a decreasing sawtooth wave pulse, thereby reducing manufacturing costs.
Abstract:
A phase controlling device of reduced cost, a fuser controlling device including the phase controlling device, and a phase controlling method. The phase controlling device includes: a first signal generating unit generating an error signal that corresponds to a difference between the reference temperature of the fuser and the actual temperature of the fuser; a pulse generating unit generating a sawtooth wave pulse signal that increases with time during a half period of the AC power; and a control signal generating unit comparing the error signal and the sawtooth wave pulse signal and outputting a phase control signal controlling phase of the AC power. The pulse generating unit generating an increasing sawtooth wave pulse may have a relatively simple circuit configuration relative to that of the pulse generating unit generating a decreasing sawtooth wave pulse, thereby reducing manufacturing costs.
Abstract:
An image forming apparatus includes a power supply unit that controls a level of electrical power supplied to the heating lamp during a warm-up of the heating unit that involves at least a first warm-up stage. During the first warm-up stage, when power begins to be supplied to the heating lamp, the power supply unit gradually increases a level of power supplied to the heating lamp from zero to a defined supply level according to a phase control of an alternating current (AC) of the source power. If a second warm-up stage is included, during the second warm-up stage, the power supply unit may maintain the level of power supplied to the heating lamp at the defined supply level until the measured surface temperature of the heating unit has reached a defined target temperature.
Abstract:
A device for fusing and fixing a transferred toner of a predetermined image onto a print paper is provided. In particular, a fusing device which can instantly control induced current provided to a fusing unit in an image printing apparatus which heats the fusing unit using the induced current is provided. The fusing device includes a fusing unit which is resistance heated or induction heated by an induced current, and fuses the toner onto the print paper using the generated heat. A sensing unit senses the temperature of the fusing unit. A reference current generating unit generates a predetermined reference current to heat the fusing unit to reach a predetermined temperature based on the temperature of the sensed fusing unit and the reference temperature. A pulse width modulation signal generating unit generates a pulse width modulation signal for generating the induced current so that the induced current corresponding to the reference current is supplied to the fusing unit.
Abstract:
A power supply, which outputs a plurality of voltages in order to improve the cross regulation between output voltages and at the same time reduce the amount of electric power consumed, and an image forming device having the same are disclosed. The power supply includes a power converter, which generates a first output power source and a second output power source in response to an external power supply and a power control signal, respectively; a power output part, which includes output parts to rectify and smooth each of the first and second output power sources; a first output controller, which receives the first output power source feedback from the power output part to generate the power control signal; and a second output controller, which receives the second output power source feedback from the power output part to control to operate the power output part in stable mode.
Abstract:
An analog control application specific integrated circuit (ASIC) apparatus for a high voltage power supply (HVPS) in an image for apparatus, and a method for controlling the HVPS are provided. The HVPS includes a transformer transforming an AC signal to a high voltage signal and a voltage doubler outputting a DC high voltage for the HVPS. The ASIC includes an analog control circuit configured as a one-chip ASIC that converts a predetermined DC level signal to a high frequency switching signal using a switching component and outputs the converted high frequency switching signal to a primary winding of the transformer. If the high voltage output signal output from the voltage doubler is not feedbacked, the switching component high frequency switches a received driving signal of a gate driver, and outputs the high frequency switched signal to the transformer.
Abstract:
A fusing roller and a fusing apparatus having the same are provided. The fusing roller includes: an induced coil, which generates an alternating magnetic flux that varies depending on an input alternating current; a heating roller, which is heated by an eddy current that is generated by the alternating magnetic flux; and a compensator, which compensates for the eddy current generated where it is located
Abstract:
A fusing roller and a fusing apparatus having the fusing roller are provided. The fusing roller includes a roller unit and an induced heat generation unit that is installed on an outer circumferential surface of the roller unit. Eddy currents are generated in the roller unit in response to an alternating current input thereto. An insulation unit insulates the induced heat generation unit from the roller unit.
Abstract:
A power control apparatus and an image forming apparatus include a non-heating control unit to control non-heating control components according to a power-on signal, and a heating control unit to increase a level of a source power supplied as roller power and to supply the increased level of the roller power to a heating roller according to phases of current of the source power such that heating the roller reaches a temperature before a power-on process of the non-heating control unit is completed.
Abstract:
A power supply, which outputs a plurality of voltages in order to improve the cross regulation between output voltages and at the same time reduce the amount of electric power consumed, and an image forming device having the same are disclosed. The power supply includes a power converter, which generates a first output power source and a second output power source in response to an external power supply and a power control signal, respectively; a power output part, which includes output parts to rectify and smooth each of the first and second output power sources; a first output controller, which receives the first output power source feedback from the power output part to generate the power control signal; and a second output controller, which receives the second output power source feedback from the power output part to control to operate the power output part in stable mode.