Abstract: The present disclosure relates to a system for controlling a motor of a vehicle for increasing control accuracy of the motor for driving the vehicle, and an object of the present disclosure is to provide a system for controlling a motor of a vehicle, which may accurately perform a motor control even when a battery voltage (i.e., motor voltage) applied to the motor upon the driving control of the motor is changed.

Abstract: A semiconductor test system includes a user device configured to operate a reference device in accordance with an interface signal based on a timing signal having a variable operating frequency, a pattern synthesis apparatus configured to measure an interval between adjacent edges of the timing signal transmitted from the user device, and extract a logic value of the interface signal in accordance with the timing signal so as to generate test pattern data, and a test device configured to receive the test pattern data, reconstruct the timing signal based on the measured interval, generate a test driving signal such that the logic value is extracted from a device under test (DUT) based on the reconstructed timing signal, and apply the test driving signal to the DUT so as to determine an operating state of the DUT.

Abstract: A sensorless control apparatus may include: a speed command unit configured to output a speed command to an electric motor; a current detector unit configured to detect electric current flowing through the electric motor if a voltage being output according to the speed command is supplied to the electric motor; a rotor angle calculation unit configured to calculate a magnetic flux of a rotor of the electric motor based on the detected electric current and the voltage being output according to the speed command, and to calculate an angle of the rotor from the calculated magnetic flux; and/or an out-of-step sensing unit configured to sense an out-of-step of the rotor according to a comparison of the calculated angle of the rotor with an angle of the rotor estimated based on a sensorless control algorithm.

Abstract: An apparatus for measuring a high speed signal may comprise a plurality of Analog-Digital converters (AD converter) that are arranged in parallel to each other to sample an input signal at different frequencies; a plurality of frequency synthesizers configured to provide each AD converter with a different sampling frequency; a signal processor configured to receive an output of the plurality of AD converters to reconstruct the input signal; and/or a controller configured to receive and process a trigger signal.

Abstract: An apparatus for measuring a high speed signal may comprise a plurality of Analog-Digital converters (AD converter) that are arranged in parallel to each other to sample an input signal at different frequencies; a plurality of frequency synthesizers configured to provide each AD converter with a different sampling frequency; a signal processor configured to receive an output of the plurality of AD converters to reconstruct the input signal; and/or a controller configured to receive and process a trigger signal.

Abstract: A sensorless control apparatus may include: a speed command unit configured to output a speed command to an electric motor; a current detector unit configured to detect electric current flowing through the electric motor if a voltage being output according to the speed command is supplied to the electric motor; a rotor angle calculation unit configured to calculate a magnetic flux of a rotor of the electric motor based on the detected electric current and the voltage being output according to the speed command, and to calculate an angle of the rotor from the calculated magnetic flux; and/or an out-of-step sensing unit configured to sense an out-of-step of the rotor according to a comparison of the calculated angle of the rotor with an angle of the rotor estimated based on a sensorless control algorithm.

Abstract: A signal capture system for capturing a signal and storing the captured signal in a storage apparatus in real time, and a test apparatus including the signal capture system. The signal capture system includes a printed circuit board; a socket that is connected to the printed circuit board and on which a reference memory component is mounted; and an interposer that is mounted on the printed circuit board, is connected to the socket, an external apparatus, and a storage apparatus, receives first signals from the reference memory component and transmits the received first signals to the external apparatus and the storage apparatus, and receives second signals from the external apparatus and transmits the received second signals to the reference memory component and the storage apparatus, wherein a shape of the socket is defined according to a type of the reference memory component.

Abstract: A phase current prediction method is disclosed. The phase current prediction method predicts current representative of a PWM period using a motor model which receives current measured through a single current sensor as an input, instead of the measured current, and determines the predicted current to be phase current.

Abstract: A semiconductor test system includes a user device configured to operate a reference device in accordance with an interface signal based on a timing signal having a variable operating frequency, a pattern synthesis apparatus configured to measure an interval between adjacent edges of the timing signal transmitted from the user device, and extract a logic value of the interface signal in accordance with the timing signal so as to generate test pattern data, and a test device configured to receive the test pattern data, reconstruct the timing signal based on the measured interval, generate a test driving signal such that the logic value is extracted from a device under test (DUT) based on the reconstructed timing signal, and apply the test driving signal to the DUT so as to determine an operating state of the DUT.

Abstract: A field mounting-type test apparatus and method for enhancing competitiveness of a product by simulating various test conditions including a mounting environment for improving quality reliability of a memory device and by minimizing overall loss due to change in a mounting environment thus reducing testing time and cost. The field mounting-type test apparatus includes a mass storage device configured to store logic data simulating a mounting environment of a device under test (DUT) and a tester main frame configured to test the DUT using the logic data.

Abstract: A signal capture system for capturing a signal and storing the captured signal in a storage apparatus in real time, and a test apparatus including the signal capture system. The signal capture system includes a printed circuit board; a socket that is connected to the printed circuit board and on which a reference memory component is mounted; and an interposer that is mounted on the printed circuit board, is connected to the socket, an external apparatus, and a storage apparatus, receives first signals from the reference memory component and transmits the received first signals to the external apparatus and the storage apparatus, and receives second signals from the external apparatus and transmits the received second signals to the reference memory component and the storage apparatus, wherein a shape of the socket is defined according to a type of the reference memory component.

Abstract: A phase current prediction method is disclosed. The phase current prediction method predicts current representative of a PWM period using a motor model which receives current measured through a single current sensor as an input, instead of the measured current, and determines the predicted current to be phase current.

Abstract: Provided are a field mounting-type test apparatus and method, which can enhance competitiveness of a product by simulating various test conditions including a mounting environment so as to improve quality reliability of a memory device and by minimizing overall loss due to change in a mounting environment so as to reduce testing time and cost. In accordance with example embodiments, the field mounting-type test apparatus may include a mass storage device configured to store logic data simulating a mounting environment of a device under test (DUT) and a tester main frame configured to test the DUT by using the logic data.

Abstract: A control method of a PI controller which selectively performs a proportional control and a proportional/integral control, the method includes Fourier transforming an output of the PI controller, calculating a spectral energy ratio of the transformed output of the PI controller of at a reference frequency for all frequency regions, performing the proportional control in response to the calculated spectral energy ratio exceeding a predetermined reference ratio, and the proportional/integral control in response to the spectral energy ratio being the predetermined reference ratio or less. Accordingly, a PI controller utilizing the method can easily detect a switching point between a proportional control and a proportional/integral control, independent of species and states of a system thereof.

Abstract: An apparatus for controlling a driving speed of a motor comprises a motor controller provided in the motor controlling apparatus detecting the motor driving speed in response to pulses outputted from an encoder. The motor controller adjusts a detection period for the pulses according to the motor driving speed, thereby measuring the motor driving speed. The motor controller sets the detection period so that a number of four-multiplied pulses can be a multiple of four. Although a phase difference between pulses outputted from an encoder is not constant, the motor controlling apparatus can obtain a desired response characteristic by excluding effects of a phase error between the pulses.

Abstract: A control method of a PI controller which selectively performs a proportional control and a proportional/integral control, the method includes Fourier transforming an output of the PI controller, calculating a spectral energy ratio of the transformed output of the PI controller of at a reference frequency for all frequency regions, performing the proportional control in response to the calculated spectral energy ratio exceeding a predetermined reference ratio, and the proportional/integral control in response to the spectral energy ratio being the predetermined reference ratio or less. Accordingly, a PI controller utilizing the method can easily detect a switching point between a proportional control and a proportional/integral control, independent of species and states of a system thereof.

Abstract: An apparatus for controlling a driving speed of a motor comprises a motor controller provided in the motor controlling apparatus detecting the motor driving speed in response to pulses outputted from an encoder. The motor controller adjusts a detection period for the pulses according to the motor driving speed, thereby measuring the motor driving speed. The motor controller sets the detection period so that a number of four-multiplied pulses can be a multiple of four. Although a phase difference between pulses outputted from an encoder is not constant, the motor controlling apparatus can obtain a desired response characteristic by excluding effects of a phase error between the pulses.

Abstract: An interrupt processing apparatus is disclosed. The apparatus processes interrupts from a plurality of interrupt sources by a central processing unit having one or more input ports. The apparatus has an interrupt controller for outputting an interrupt request signal for requesting an interrupt process from a corresponding interrupt source to a designated input port if the central processing unit assigns a priority to the corresponding interrupt source which generates the interrupt such that the apparatus processes interrupts from the interrupt sources more than the number of the input ports. The interrupt controller has a detection unit and a signal generating unit for outputting the interrupt request signal to a designated input port in conjunction with an operation of the detection unit.

Abstract: An apparatus for eliminating variable offset values of current detecting signals and its method having a current detector for detecting feedback current from a three-phase AC motor and for converting the feedback current into voltage detecting signals containing offset elements, differential amplifiers for differentially operating a feedback analog offset signal and the voltage detecting signals, output amplifiers for amplifying the differentially operated voltage detecting signals to fit within the input range for controlling, an analog/digital converter for converting the amplified signals into digital signals, a control part for adding up the digital signals to a digital offset value and for comparing the digital offset value with a predetermined offset command and for applying a proportional plus integral function to the compared result and for outputting a digital offset signal of a pulse-width modulation waveform, and a digital/analog converter for converting the digital offset signal into the analog of