Hyundai Motor Company

Kia Corporation

Kia Motors Corporation

Joo Yeon Kim

Sung Do Kim

Chang Seok You

Min Su Kang

Min Woo Kang

Seong Cheol Jeong

Yeon Man Jeong

Se Jin Yoo

Jong Wan Han

Hui Kyoung Chang

Hyo Jeong Lee

Chan Su Rha

A motor driving apparatus includes a motor an inverter driving the motor based on a switching signal, and a controller. The controller determines a current position estimated value of the motor by applying a zero-voltage vector pulse to the switching signal when entering the driving control of the motor, determines whether the motor is in a stop state according to an amount of change in the current position estimated value, and performs a pulse width modulation control by adjusting a duty ratio of the switching signal when the motor is determined to be in the stop state.

Motor driving apparatus and control method therefor

A motor driving apparatus and a method of driving the same are disclosed. The motor driving apparatus includes a motor, an inverter configured to drive the motor based on a switching signal, and a controller configured to output the switching signal when pulse width modulation control is performed, to stop the pulse width modulation control when a predetermined condition is satisfied, and to apply a zero-voltage vector pulse to the switching signal in a period in which execution of the pulse width modulation control is stopped, for determination of a current speed estimation value of the motor.

Motor driving apparatus and method of controlling the same

In an embodiment a regenerative braking control apparatus includes a fuel cell stack configured to provide energy to a driving motor of the vehicle, a cathode oxygen depletion (COD) heater configured to remove gas remaining in the fuel cell stack, a high voltage battery configured to supply power to the driving motor or to be charged by using power generated by the driving motor through regenerative braking and a processor configured to calculate a reference state-of-charge (SOC) based on an expected driving route, to calculate a limit power for the COD heater based on an operating state of a cooling device for cooling the COD heater when a SOC of the high voltage battery is greater than or equal to the reference SOC and to calculate consumable power of the COD heater based on the limit power of the COD heater.

Apparatus and method for controlling regeneration of fuel cell vehicle

Disclosed are a sensorless induction motor system including a controller configured to control operation of a motor by controlling a voltage applied to each phase of a stator, to set a stop waiting time expected to be required for the rotor to stop during stop control of the motor, to apply a pulse voltage to each phase of the stator a plurality of times after the stop waiting time, and to determine that the rotor is stopped when rotor position vectors having largest induced current deviations are observed as the same rotor position vector, and a control method thereof.

Sensorless induction motor system and control method thereof

Proposed is a method of diagnosing abnormality of sensorless control of a motor for an air compressor, the method including estimating a speed of a motor in real time when a motor starts determining whether or not a preset condition for activating a function of diagnosing abnormality of sensorless control is satisfied, from a slope of the estimated speed of the motor performing control for decreasing an amount of electric current to be applied to the motor, in a case where the preset condition is satisfied computing an amount of decrease in the slope of the estimated speed of the motor while the amount of the electric current is decreased; and determining whether or not the sensorless control fails, by comparing the amount of the decrease in the slope of the speed of the motor with a preset value for confirming diagnosis of the abnormality of the sensorless control.

Method of diagnosing abnormality of sensorless control of motor for air compressor

A sensorless induction motor system includes a control unit which applies a plurality of sampling pulse voltages to phases of the stator, estimates the position of a rotor through a first rotor position vector having the greatest deviation in an induced current, compares an induced current deviation of a second rotor position vector having a second greatest deviation of deviation of the induced current with that of a first rotor position vector, and determines whether or not permanent magnets are demagnetized; and a method of controlling the sensorless induction motor system.

A sensorless induction motor system and a control method thereof includes a motor including a stator including windings forming a plurality of phases and a rotor including a permanent magnet, and a controller configured to control operation of the motor by controlling a voltage applied to each phase of the stator, to set a stop waiting time predicted to be necessary for the rotor to stop when the motor is controlled to stop, to apply a pulse voltage to each phase of the stator a plurality of times after the stop waiting time, and to conclude that the rotor has stopped when a minimum deviation value of an induced current is equal to or greater than a reference value.

Disclosed herein is a method of controlling start/stop of a parallel fuel cell system, which, when controlling stop of a parallel fuel cell system in which two or more fuel cell systems are connected in parallel, considers operating state information of each fuel cell system, such as a current speed value of an air compressor and an opening degree of an air-exhaust-side air pressure valve of a fuel cell stack. Accordingly, the method can calculate a delay time for performing fuel cell system stop control for the two or more fuel cell systems, and sequentially perform the fuel cell system stop control for the two or more fuel cell systems based on the calculated delay time. Therefore, it is possible to minimize output delay of each fuel cell system and to achieve deterioration prevention and efficiency improvement of the fuel cell stack by fuel cell system start/stop control.

Method of controlling start/stop of parallel fuel cell system

A motor-driving control system includes an actuator configured to generate rotational force by driving received current, a current provider configured to provide current to the actuator while repeatedly turning on and off the current at a preset period and duty, and a controller configured to estimate a rotation position or a rotation speed of the actuator in a section in which the current of the current provider is turned on or off and to control the current provider to follow a speed command based on the estimated rotation position or rotation speed.

Motor-driving control system and method

A vehicle thermal management system for significantly improving thermal management performance includes a first group including a battery, a second group including one or more power electronics (PE) components, a plurality of cooling lines in thermal communication with an air-cooled radiator, and a six-way valve. The six-way valve includes a housing having a plurality of inlets and a plurality of outlets, a valve member mounted to be rotatable in the housing, and an actuator driving the valve member. The housing has a plurality of passages allowing the plurality of inlets to selectively communicate with the plurality of outlets by rotation of the valve member. In addition, the plurality of passages include a plurality of inner passages formed in an interior space of the housing, and a plurality of outer passages formed in an exterior space of the housing.

Growing community of inventors

Seoul, South Korea

Joo Yeon Kim