Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An apparatus for generating sinusoidal waves may include a look-up table storage unit storing a look-up table including a plurality of sampling points determined based on a base frequency and a sampling frequency, a sinusoidal wave generation unit calculating an integer ratio of the target frequency to the base frequency and loading sampling points from the look-up table by reflecting the integer ratio, to generate a sinusoidal wave, a voltage step-up unit providing a stepped-up voltage to the sinusoidal wave generation unit, and a correction control unit sensing the stepped-up voltage from the voltage step-up unit and performing controlling so that the sampling points are corrected in the case that a level of the stepped-up voltage does not meet a predetermined requirement.

Abstract: Disclosed herein is an apparatus for driving a motor, including: a rectifying unit rectifying alternative current (AC) input power to generate direct current (DC) power; an inverter applying the DC power to the respective phases of the motor through a switching operation thereof; and a motor driver converting back-electromotive force values sequentially sampled in floating sections of the respective phases into digital values and detecting position information of ZCPs of the respective phases through a pattern of back-electromotive force formed using comparison result values between the digital values and a reference voltage value.

Abstract: 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

Abstract: There are provided a motor driving control apparatus, a motor driving control method, and a motor using the same. The motor driving control apparatus includes a controller, a duty ratio calculation unit, and a driving signal generation unit. The controller generates a speed control signal by using at least one of a speed signal of a motor device and a speed command signal input from the outside. The duty ratio calculation unit calculates a duty ratio of the speed control signal. The driving signal generation unit generates a driving control signal for controlling driving of the motor device by using the duty ratio.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: There are provided an apparatus for driving a piezo actuator and a method of driving the same. The apparatus includes: a control unit generating a digital control signal and converting the digital control signal into an analog control signal; a driving unit amplifying and not inverting the analog control signal to generate a first driving signal and amplifying and inverting the analog control signal to generate a second driving signal, with respect to a predetermined common voltage, and applying the first and second driving signals to both terminals of a piezo actuator; and an offset determining unit determining an offset in the first and second driving signals based on a voltage according to a current flowing in the piezo actuator, wherein the control unit generates the digital control signal to have an intermediate level in a predetermined offset detection section.

Abstract: 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.

Abstract: 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.

Abstract: There are provided a motor driving device and a method of controlling the same. The motor driving device includes a controlling unit; a plurality of unit circuits provided within the controlling unit and controlling driving of a motor; and a time slice controller provided within the controlling unit and periodically generating a wake-up signal, wherein some unit circuits among the plurality of unit circuits are operated for a certain operation time upon receiving the wake-up signal, thereby allowing for effective power consumption of the motor.

Abstract: There is provided a motor driving apparatus capable of optimizing driving efficiency by adjusting a phase difference between current applied to a motor and voltage detected from the motor and performing the adjustment of the phase difference when a pulse width modulation (PWM) signal has a set duty. The motor driving apparatus includes: a driving unit driving a motor according to driving control; a driving controlling unit controlling the driving of the motor by the driving unit, based on an adjusted phase correction signal; and a phase correcting unit correcting a phase difference between a motor detection signal having motor rotation speed information and a current detection signal having detection information regarding current flowing in the motor when a duty of a pulse width modulation (PWM) signal driving the motor satisfies a preset reference duty, and providing the phase correction signal to the driving controlling unit.

Abstract: Disclosed herein are a biasing circuit for a hall sensor and a hall amplifier in a motor driving circuit, the biasing circuit including: a regulator installed inside a singled packaged chip, supplied with external power, and regulating the external power in voltage appropriate for a circuit to supply the regulated voltage; the hall amplifier supplied with the voltage regulated from the regulator, receiving an output signal from the hall sensor outside the chip, and amplifying the output signal to output the amplified signal; first and second resistors supplied with the voltage from the regulator to generate an input voltage common mode (VCM) of the hall amplifier; and third and fourth resistors supplied with the voltage from the regulator to generate an input VCM of the hall sensor.

Abstract: There are provided a circuit for detecting a rotor position, and an apparatus and a method for motor driving control using the same. The circuit for detecting a rotor position includes a sampling unit sampling a plurality of phase currents flowing in a plurality of phases to provide sampled phase currents; and a comparison unit comparing the sampled phase currents with one another to determine a phase having a minimum or maximum value.