Hyundai Motor Company

Kia Motors Corporation

Seoul National University

Lsis Co., Ltd.

Snu Rdb Foundation

Suprema Inc.

Kia Corporation

Ho Joon Shin

Sung Kyu Kim

Joo Young Park

Su Hyun Bae

Heon Young Kwak

Yong Jae Lee

Mu Shin Kwak

Hong Geuk Park

Jung Ik Ha

Nam Koo Han

Sang Yoo Lee

Jun Mo An

Young Kook Lee

Chae Duck Chon

Yong Su Han

Jae Won Lee

Bong Seop Song

Jae Ho Hwang

Anno Yoo

Bo Gun Park

Ki Deok Lee

Tae Young Ha

HeonYoung Kwak

Tae Won Ha

Kwon Yub Hyung

Disclosed herein is a fault diagnosis apparatus of a rapid charging system for a vehicle including an external device configured to exchange power with a vehicle battery, a power transfer unit including a three-phase motor, an inverter connected to the battery in parallel and connected to the three-phase motor, and one or more relays connected to the three-phase motor and configured to transfer power between the external device and the battery, and a controller configured to control the on and off functions of the relay, to control driving of the inverter to generate voltages applied to one end of each of the relays, and to diagnose fault of relays by comparing voltages of both ends of the relays while turning the relays on/off.

Fault diagnosis apparatus and method of rapid charging system for vehicle

A fault diagnosis method of a power electric system for a vehicle may include driving an inverter to output an output voltage command for fault detection; measuring a current input to each phase of a motor connected to the inverter; measuring a voltage of the neutral stage of the motor; and determining whether there are faults of a connection member connecting between the inverter and the motor and a relay connected to the neutral stage of the motor based on the measured current input to each phase of the motor and the voltage of the neutral stage.

Fault diagnosing method and apparatus of power electric system for vehicle

An error determining apparatus of a driving device including a motor and a 3-phase inverter supplying power to the motor through a 3-phase cable may include a resistor provided in each phase of the 3-phase cable, a voltage sensing device sensing voltage of opposite ends of the resistor by a current flowing into the resistor, and a sensing controller determining whether the resistor is faulty or whether the 3-phase cable is opened, based on the sensing voltage of the voltage sensing device and a 3-phase current sum of the 3-phase inverter.

Error determining apparatus and method for vehicle motor

A charging system configured for reducing a leakage current may include an on board charger (OBC) receiving an alternating current (AC) power supplied from an external source to charge a vehicle battery with the AC power; at least an electric component connected to an output end portion of the OBC; at least a switch selectively connecting the electric component to or from a ground; and a controller connected to the at least a switch and reducing the leakage current flowing to the ground by controlling the switch connected to the electric component depending on whether or not the vehicle battery is charged with the AC power.

Charging system capable of reducing leakage current

An apparatus for controlling an inverter to drive a motor includes: a current control processor generating a voltage command for generating d/q axis current detection values, which are obtained by measuring current supplied to the motor, to follow a d/q axis current command for driving the motor, the current control processor converting the voltage command, which is sampled according to a sampling frequency generated based on a voltage vector phase of the voltage command, into a voltage vector corresponding to a point on each vertex and each side of a hexagon in a voltage vector diagram to apply a resulting value to the inverter driving the motor; and a sample frequency computing processor computing the sampling frequency based on the voltage vector phase of the voltage command and a reference number of sampling times during one rotation period of the motor.

Apparatus for controlling inverter to drive motor

A system for diagnosing switching element selectively connecting Y-capacitors to ground is provided. The state of a switching device in a power conversion circuit is adjusted such that voltages of different levels are applied to the Y-capacitors, respectively. Therefore, a Y-capacitor disconnect switch which connects a plurality of Y-capacitors connected in common to a DC link to chassis ground is diagnosed.

System for diagnosing switching element selectively connecting Y-capacitors to ground

A method and a system for driving a hybrid vehicle are provided for determining whether the hybrid vehicle is driven in a sensorless control mode or not by estimating a rotor position value based on electric current and voltage of a drive motor. Such a hybrid vehicle is capable of controlling the drive motor to operate by using a transmission in an area in which precise torque control of the drive motor is possible, without using information detected by a stator position sensor provided in the drive motor of the hybrid vehicle. Accordingly, a drive motor control precision is improved when a rotor position sensor does not operate normally, thereby preventing a vehicle shutdown from occurring.

Method and system for driving hybrid vehicle

A charging system for a vehicle includes: a power transmitter transmitting power for charging a battery of a vehicle; a charger including a three-phase motor and inverter, and receiving the power from the power transmitter; an input voltage calculating processor selecting any one of a plurality of predetermined duty ratios and calculating a value of an input voltage supplied to the charger based on the selected duty ratio and a voltage value of the battery of the vehicle; an input current calculating processor calculating a value of an input current based on the calculated value of the input voltage and a value of the power transmitted by the power transmitter; a power transmission controller instructing the calculated input current to be input to the charger; and a charging controller instructing the battery of the vehicle to be charged.

Charging system and method for vehicle

An apparatus for controlling an inverter for driving a motor includes a processor which includes: a current processor for generating a voltage command for causing a current detection value obtained by measuring a current supplied from the inverter to the motor to follow a current command for driving the motor; a voltage modulator for generating a pulse width modulation signal for controlling on and off states of switching elements in the inverter with a predetermined switching frequency based on the voltage command; and a frequency determining processor for setting a frequency change range within which the switching frequency will be randomly changed and randomly determining the switching frequency within the frequency change range when a random pulse width modulation method is applied to control of the inverter.

Apparatus and method for controlling inverter for driving motor

An apparatus for controlling an inverter for a motor driving includes: a current controller configured to generate a d/q-axis voltage reference for allowing a d/q-axis current detection value, which is obtained by measuring a current supplied from the inverter to the motor, to converge on the d/q-axis current reference for driving the motor, and a voltage modulator configured to control switching of the inverter by selectively applying one among a plurality of predetermined pulse width modulations (PWM) based on a point at which the d/q-axis voltage reference is located in a hexagonal space voltage vector diagram.

A method and a system for controlling a motor for a vehicle are provided. The vehicle is capable of being continuously driven by controlling the motor based on position information of a rotor derived using a sensorless estimation algorithm in the event of a failure of a position sensor of a motor rotor while the vehicle is being driven.

Method and system for controlling motor for vehicle

An apparatus for controlling an inverter for driving a motor including a processor which includes: a current processor configured to generate a voltage command for allowing a current detection value, generated by measuring a current provided from an inverter to a motor, to follow a current command for driving the motor; a voltage modulator configured to generate a pulse width modulation signal for controlling on and off states of a switching element within the inverter with a predetermined switching frequency based on the voltage command; and a frequency determining processor configured to randomly change the switching frequency based on driving information of the motor.

An apparatus for controlling a motor of a vehicle includes: a current controller generating a voltage instruction for driving the motor; a signal generator generating a magnetic pole discrimination reference signal that is combined with the voltage instruction; an inverter driving the motor on the basis of a corrected voltage instruction obtained by comparing the voltage instruction and the magnetic pole discrimination reference signal; and a processor including a control logic for deriving a response component to the magnetic pole discrimination reference signal from a driving current transferred to the motor from the inverter, and for determining a polarity of the rotor of the motor on the basis of the response component.

Apparatus for controlling motor of vehicle

A charging system for improving a power factor and a current quality in a grid stage is provided. The charging system includes a rectifying circuit that is configured to rectify a grid power and a converter that is configured to receive a voltage-current rectified by the rectifying circuit and convert the voltage-current into a charge voltage-current to be provided to a battery. A capacitor is connected across a connection end of the rectifying circuit and the converter. The converter includes a first high frequency switching circuit, a transformer, and a second high frequency switching circuit.

Charging system without power factor correction circuit

A dual inverter control method is capable of improving power efficiency of an inverter and a motor by controlling a dual inverter through 6-step control to apply a voltage to the motor in a motor driving system using the dual inverter. The dual inverter control method for controlling first and second inverters having output terminals commonly connected to a motor includes comparing all voltage commands for driving the motor with the magnitude of a DC voltage commonly applied to the first and second inverters; and generating a first voltage command with respect to an output of the first inverter and a second voltage command with respect to an output of the second inverter by selectively applying high gain over voltage modulation (HOVM) depending on a comparison result.

Growing community of inventors

Suwon-si, South Korea

Ho Joon Shin