Patent application number | Description | Published |
20130221891 | MOTOR DRIVER HAVING BUILT IN SELF TEST FUNCTION - There is provided a motor driver having a built-in self test function. The motor driver includes: a test signal generating unit generating a test signal having a preset frequency; a signal processing unit processing an input sensing signal; and a selecting unit selecting one of the test signal from the test signal generating unit and a signal from the signal processing unit. The motor driver further includes: a motor driving controlling unit receiving the signal selected by the selecting unit to perform a motor driving control operation or a preset test. | 08-29-2013 |
20140062363 | MOTOR DRIVING APPARATUS - There is provided a motor driving apparatus capable of implementing a soft switching method using a simple circuit. The motor driving apparatus includes: a driving unit including a plurality of transistor pairs, respectively including at least two transistor units connected between a driving power terminal supplying driving power and a ground, and connected in parallel to each other, the plurality of transistor pairs being switched according to a switching control signal to drive a motor; and a driving control unit providing the switching control signal controlling switching of the respective transistor units of the plurality of transistor pairs, wherein at least one transistor unit of the plurality of transistor pairs includes a plurality of transistors connected in parallel to each other and being switched on or off in a predetermined order. | 03-06-2014 |
20140091741 | MOTOR DRIVING APPARATUS AND MOTOR DRIVING METHOD - There are provided a motor driving apparatus and a motor driving method capable of decreasing power consumption by readjusting a preset duty ratio according to a voltage level of driving power. The motor driving apparatus includes: a driving power detecting unit detecting a voltage level of driving power used to drive a motor; a speed controlling unit adjusting a preset duty ratio of a pulse width modulation (PWM) signal when the voltage level detected by the driving power detecting unit is equal to or less than a preset reference voltage; a driving controlling unit generating a driving signal having the duty ratio from the speed controlling unit; and a driving unit driving the motor according to the driving signal of the driving controlling unit. | 04-03-2014 |
20140117896 | APPARATUS AND METHOD FOR MOTOR DRIVING CONTROL AND MOTOR USING THE SAME - There are provided an apparatus and method for motor driving control, and a motor using the same. The motor driving control apparatus according to an embodiment of the present invention includes a driving circuit unit providing an initial driving control signal of a motor; a current detection unit detecting initial driving current generated by the initial driving control signal; and a control unit determining that back-electro motive force is generated when the initial driving current decreases to a preset critical value or below and controlling the motor to be normally driven. | 05-01-2014 |
20140132314 | TRIANGULAR WAVEFORM GENERATING APPARATUS - There is provided a triangular waveform generating apparatus. The triangular waveform generating apparatus includes: a capacitor connected between an output terminal and a ground; a charging/discharging unit including a plurality of current sources to charge the capacitor with currents generated from the plurality of current sources or discharge currents therefrom; and a control unit comparing a charge voltage of the capacitor with a plurality of preset reference voltages and controlling the charging/discharging unit to allow a quantity of current charged in or discharged from the capacitor to be different in each of a plurality of periods formed by the plurality of reference voltages. | 05-15-2014 |
20140152220 | MOTOR DRIVING CONTROL APPARATUS AND METHOD, AND MOTOR USING THE SAME - There are provided a motor driving control apparatus and method and a motor using the same. The motor driving control apparatus includes: a back-electromotive force detecting unit detecting back-electromotive force of a motor apparatus; a gradient calculating unit calculating a gradient of a waveform of the detected back-electromotive force; and a controlling unit calculating a zero-crossing point of the back-electromotive force using the calculated gradient and controlling driving of the motor apparatus using the calculated zero-crossing point. | 06-05-2014 |
20140152221 | MOTOR DRIVING CONTROL APPARATUS AND METHOD, AND MOTOR USING THE SAME - There are provided a motor driving control apparatus and method, and a motor using the same. The motor driving control apparatus includes: a back-electromotive force detecting unit detecting back-electromotive force generated in a motor apparatus; a zero-crossing calculating unit sampling the back-electromotive force and determining a zero-crossing point using an average value of adjacent sections in the sampled back-electromotive force; and a controlling unit controlling driving of the motor apparatus using the zero-crossing point. | 06-05-2014 |
20140159623 | MOTOR DRIVING APPARATUS AND METHOD - There are provided a motor driving apparatus and method capable of driving a motor at an optimal driving frequency at which back-electromotive force is generated by sweeping a driving frequency by a preset unit frequency interval during initial driving of the motor, the motor driving apparatus including: a frequency signal generating unit providing a frequency signal of which a frequency is set by a preset unit frequency interval; a driving signal generating unit generating a driving signal based on the frequency signal from the frequency signal generating unit; and a driving unit driving a motor according to the driving signal from the driving signal generating unit. | 06-12-2014 |
20140159624 | MOTOR DRIVING CONTROL APPARATUS AND METHOD, AND MOTOR USING THE SAME - There are a motor driving control apparatus and method, and a motor using the same, the motor driving control apparatus including a back-electromotive force detecting unit detecting back-electromotive force generated from a motor apparatus, an offset correcting unit determining whether an offset delay is present in the back-electromotive force detecting unit and correcting the offset delay when the offset delay is present, and a controlling unit controlling a driving of the motor apparatus using the back-electromotive force in which the offset delay is corrected by the offset correcting unit. | 06-12-2014 |
20150069943 | MOTOR DRIVING CONTROL APPARATUS, MOTOR DRIVING CONTROL METHOD, AND MOTOR SYSTEM USING THE SAME - There are provided a motor driving control apparatus, a motor driving control method and a motor system using the same. The motor driving control apparatus includes: a back-electromotive-force detecting unit detecting back electromotive force generated by a motor apparatus; a floating correcting unit, if zero-crossing has not occurred in a current floating area, correcting the floating area by predicting a time at which a zero-crossing occurs; and a control unit determining a zero-crossing time of the back electromotive force based on an output from the floating correcting unit and controlling driving of the motor apparatus using the determined zero-crossing time. | 03-12-2015 |
20150069944 | MOTOR DRIVING CONTROL APPARATUS, MOTOR DRIVING CONTROL METHOD AND MOTOR SYSTEM USING THE SAME - There are provided a motor driving control apparatus, a motor driving control method, and a motor system. The motor driving control apparatus includes: a zero-crossing detecting unit detecting back electromotive force generated in a motor apparatus and detecting a zero-crossing point of the back electromotive force; a commutation point calculating unit calculating an average value for zero-crossing points detected at least three times to determine a commutation point using the calculated average value; and a control unit controlling a phase change of the motor apparatus using the commutation point. | 03-12-2015 |
Patent application number | Description | Published |
20090114433 | MULTI-LAYERED CERAMIC BOARD AND METHOD OF MANUFACTURING THE SAME - There is provided a multi-layered ceramic board and a method of manufacturing the same. A multi-layered ceramic board according to an aspect of the invention may include: an internal layer having a plurality of first dielectric sheets laminated, each of the first dielectric sheets prepared by mixing glass powder with a predetermined amount of alumina powder; and an external layer having at least one second dielectric sheet laminated on the surface of the internal layer, the second dielectric sheet prepared by mixing glass powder with alumina powder in a smaller amount than the first dielectric sheet, wherein via hole conductors and internal electrodes provided in the internal layer are electrically connected to a surface electrode provided on the surface of the external layer, and the internal layer, the external layer, the via hole conductors, the internal layer, and the surface electrode are fired at a predetermined temperature. | 05-07-2009 |
20090114434 | METHOD OF MANUFACTURING NON-SHRINKAGE CERAMIC SUBSTRATE AND NON-SHRINKAGE CERAMIC SUBSTRATE USING THE SAME - There is provided a method of manufacturing a non-shrinkage ceramic substrate, and a non-shrinkage ceramic substrate using the same. A method of manufacturing a non-shrinkage ceramic substrate by firing a ceramic laminate including an internal electrode circuit pattern according to an aspect of the invention may include: laminating at least one constraining ceramic sheet on each of the upper and lower surfaces of the ceramic laminate to form constraining layers; performing a primary firing process on the ceramic laminate having the constraining layers thereon; polishing the surface of the ceramic laminate from which the constraining layers are removed; forming ceramic paste on the polished surface of the ceramic laminate while exposing connection terminals of the internal electrode circuit pattern to the outside environment through openings in the ceramic paste; forming a surface electrode on the surface of the ceramic paste by patterning so that the surface electrode is electrically connected to the connection terminals; and performing a secondary firing process so that the surface electrode adheres to the ceramic paste. | 05-07-2009 |
20090159179 | METHOD OF MANUFACTURING MULTILAYER CERAMIC SUBSTRATE - A method of manufacturing a multilayer ceramic substrate according to an aspect of the invention may include: manufacturing a ceramic laminate including a glass component; laminating constraining layers on upper and lower parts of the ceramic laminate; performing primary firing within a first temperature range that does not allow crystallization of the glass component included in the ceramic laminate; removing the constraining layers and forming an external electrode on the ceramic laminate after the primary firing is completed; and performing secondary firing of the ceramic laminate having the external electrode formed thereon within a second temperature range higher than the first temperature range. | 06-25-2009 |
20110034606 | COMPOSITE DIELECTRIC COMPOSITION HAVING SMALL VARIATION OF CAPACITANCE WITH TEMPERATURE AND SIGNAL-MATCHING EMBEDDED CAPACITOR PREPARED USING THE SAME - Disclosed herein is a composite dielectric composition having a small variation of capacitance with temperature, comprising a combination of a polymer matrix exhibiting a positive or negative variation of capacitance with temperature and a ceramic filler exhibiting a negative or positive variation of capacitance with temperature which is reciprocal to that of the polymer matrix; and a signal-matching embedded capacitor prepared by using the same composition. Particularly, the present invention provides a composite dielectric composition comprising a polymer matrix exhibiting a positive or negative variation of capacitance with temperature and a ceramic filler exhibiting a variation of capacitance which is reciprocal to that of the polymer matrix; and a signal-matching embedded capacitor formed of the same composition and having a variation of capacitance with temperature, ΔC/C×100(%), of not more than 5%. The composite dielectric composition of the present invention can be used in preparation of the signal-matching embedded capacitor due to a small variation of capacitance with temperature. | 02-10-2011 |
20110064952 | CERAMIC SUBSTRATE AND METHOD OF FABRICATING THE SAME - A method of fabricating a ceramic substrate includes: preparing a firing theta; forming a ceramic laminated body comprising at least one internal confinement layer on the ceramic theta; providing a temperature-compensation ceramic layer on at least one of a top surface of the ceramic laminated body and a bottom surface of the ceramic laminated body contacting the firing theta, the temperature-compensation ceramic layer having a different initial firing shrinkage temperature than the ceramic laminated body; and firing the ceramic laminated body. | 03-17-2011 |
Patent application number | Description | Published |
20130087488 | APPARATUS FOR PRODUCING REDUCING WATER - An apparatus for producing reducing water that maintains a neutral range of pH and exhibits superior reducing force. The apparatus for producing reducing water includes an electrolytic bath including a cathode chamber provided with a cathode, an anode chamber provided with an anode, and an intermediate chamber interposed between the cathode chamber and the anode chamber, wherein the cathode chamber and the intermediate chamber are provided with an inlet through which water is supplied, and an outlet through which water is discharged, a cation exchange membrane is provided between the cathode chamber and the intermediate chamber, and the intermediate chamber includes a cation exchange resin that dissociates hydrogen ions when the cation exchange resin reacts with water. | 04-11-2013 |
20130092530 | APPARATUS FOR PRODUCING ELECTROLYTIC REDUCED WATER AND CONTROL METHOD THEREOF - An apparatus for producing electrolytic reduced water capable of electrolyzing purified water, which is filtered through reverse osmosis, by use of concentrated water that remains after the purification. The apparatus includes a water purifying apparatus, and an electrolytic cell provided with a first chamber having a cathode, a second chamber having an anode, and a third chamber disposed between the first chamber and the second chamber to receive concentrated water from the water purifying apparatus. | 04-18-2013 |
20130092560 | ELECTRODE SYSTEM AND METHOD FOR CALCULATING CHARACTER VALUES OF SOLUTION USING THE SAME - Disclosed is an electrode system capable of more accurately measuring properties of solutions using a porous platinum electrode. The electrode system includes a low porosity platinum electrode in which platinum is deposited in a porous form on the surface of an electrode, and a high porosity platinum electrode having a higher roughness factor than the low | 04-18-2013 |
20130193002 | APPARATUS FOR PRODUCING ELECTROLYTIC REDUCED WATER AND CONTROL METHOD THEREOF - An apparatus for producing electrolytic reduced water capable of improving the sterilization performance and a control method thereof, the apparatus including an electrolytic cell configured to produce electrolytic reduced water by electrolyzing purified water that is penetrated through a reverse osmosis filter of a water purifying unit, a water storage tank configured to store the electrolytic reduced water, a sterilization electrolytic cell configured to produce sterilization water by electrolyzing reverse osmosis waste water that is discharged from the water purifying unit, and a control unit configured to perform a control operation to sterilize at least one of the water storage tank, a cork connected to the water storage tank, and a pipe that connect the water storage tank to the electrolytic cell by use of the sterilization water. | 08-01-2013 |