Patent application number | Description | Published |
20150123583 | MOTOR DRIVING CONTROL APPARATUS AND METHOD, AND MOTOR SYSTEM USING THE SAME - A motor driving control apparatus may include a zero cross point (ZCP) detecting unit detecting back electromotive force generated by a motor apparatus and detecting a plurality of zero cross points in the back electromotive force, a zero cross point correcting unit correcting the plurality of zero cross points when a time interval between the plurality of zero cross points is equal to a predetermined error period or longer, and a controlling unit controlling driving of the motor apparatus using the plurality of corrected zero cross points. | 05-07-2015 |
20150130391 | MOTOR DRIVE CONTROLLER AND MOTOR DRIVE CONTROL METHOD, AND MOTOR SYSTEM USING THE SAME - A motor drive controller may include: a current detecting unit detecting current values corresponding to a plurality of phases of a motor using a plurality of resistor elements; a correcting unit correcting an error in the detected current values caused by an error in the plurality of resistor elements; and a controlling unit controlling driving of the motor using an output of the correcting unit. | 05-14-2015 |
20150137662 | APPARATUS AND METHOD OF DRIVING PIEZOELECTRIC ACTUATOR, AND SYSTEM FOR DRIVING PIEZOELECTRIC ACTUATOR USING THE SAME - An apparatus for driving a piezoelectric actuator may include: a digital-to-analog conversion unit receiving digital waveform information and outputting an analog signal corresponding thereto; an amplification unit amplifying the analog signal to generate an analog voltage; and a power supply unit supplying power for the amplification. The power supply unit adjusts a level of the power using the digital waveform information. | 05-21-2015 |
20150162519 | APPARATUS AND METHOD FOR GENERATING SINUSODIAL WAVES, AND SYSTEM FOR DRIVING PIEZO ACTUATOR USING THE SAME - An apparatus for generating sinusoidal waves may include a look-up table storage unit including a plurality of sampling points determined based on a base frequency and a sampling frequency, a resolution scale unit loading the sampling points at a rate according to an input signal and calculating interpolation value data between the loaded sampling points so as to output the calculated interpolation value data along with the sampling points, and a sinusoidal wave generation unit generating a sinusoidal wave by using the sampling points and the interpolation value data | 06-11-2015 |
20150180385 | DRIVING SIGNAL GENERATING APPARATUS, AND SYSTEM AND METHOD FOR DRIVING MOTOR USING THE SAME - A system for driving a motor may include a motor apparatus including a rotor and a stator, a driving controller generating a voltage command using a target speed input from the outside or a speed of the rotor, and a driving signal generating apparatus including a plurality of inverters, generating a motor driving signal in response to the voltage command using one of the plurality of inverters, and providing the generated motor driving signal to the motor apparatus. | 06-25-2015 |
20150188021 | APPARATUS AND METHOD OF DRIVING PIEZOELECTRIC ACTUATOR, AND PIEZOELECTRIC SYSTEM USING THE SAME - An apparatus for driving a piezoelectric actuator may include a waveform synthesizing unit outputting a digital value using waveform information input from the outside, an amplifying unit amplifying an analog value corresponding to the digital value, a voltage supplying unit generating an amplified voltage by amplifying an external input voltage and providing the amplified voltage to the amplifying unit, and a stabilization controlling unit determining whether the amplified voltage is stabilized and controlling the waveform synthesizing unit so as to output the digital value in the case in which the amplified voltage is stabilized. | 07-02-2015 |
20150188022 | APPARATUS AND METHOD OF DRIVING PIEZOELECTRIC ACTUATOR - An apparatus for driving a piezoelectric actuator may include a waveform synthesizing unit outputting a digital signal by using a preset lookup table, a digital to analog converting unit outputting at least one of a symmetrical waveform or an asymmetrical waveform by converting the digital signal, and a controlling unit controlling an output of the asymmetrical waveform by controlling an output of the digital to analog converting unit in response to an external input. | 07-02-2015 |
20150188421 | VOLTAGE REGULATOR - A voltage regulator may includes: a voltage regulator circuit unit converting an input voltage into an output voltage; a voltage monitoring unit detecting the level of the input voltage or the output voltage of the voltage regulator circuit unit, comparing the levels of the detected voltage and a set voltage with each other, and controlling a bypass path depending on the comparison result; and a bypass circuit unit forming the bypass path between an input terminal and an output terminal of the voltage regulator circuit unit depending on the control of the bypass path by the voltage monitoring unit. | 07-02-2015 |
20150188456 | PIEZOELECTRIC ELEMENT DRIVING APPARATUS AND METHOD, AND PIEZOELECTRIC SYSTEM USING THE SAME - A piezoelectric element driving apparatus may apply a predetermined driving signal to a piezoelectric element to drive the piezoelectric element. The driving signal may be an asymmetrical waveform in which amplitudes of first and second polarities thereof are different from each other. An exemplary embodiment in the present disclosure may provide a piezoelectric element driving apparatus and method having a high output while protecting dielectric characteristics of a piezoelectric element by driving the piezoelectric element using an asymmetrical driving signal. | 07-02-2015 |
20150188461 | MOTOR DRIVING CONTROL APPARATUS AND METHOD, AND MOTOR DRIVING SYSTEM USING THE SAME - A motor driving control apparatus may include: a speed estimating unit calculating an estimated speed of a rotor of a motor apparatus by using phase currents flowing in a plurality of phases of the motor apparatus; a speed controlling unit generating an instruction speed by using the estimated speed and a target speed input from the outside; and a control determining unit controlling the motor apparatus to perform one of a sensorless control operation using the instruction speed and a preset synchronous start control operation, depending on whether or not the estimated speed is equal to or less than a preset value. | 07-02-2015 |