Hyundai Motor Company

Kia Motors Corporation

Pohang University of Science and Technology Foundation

Hong Seok Song

Ki Young Jang

Jung Hong Joo

Ki Jong Lee

Won Kyoung Choi

Shin Hye Chun

Hyong Joon Park

Byeong Cheol Song

Jeong Yun Lee

Jin Hwan Jung

Joon Hwan Kim

Kwang Hee Nam

Doo Yong Oh

Sangcheol Shin

In Pil Yoo

Ki Youn Jang

Jong Kyung Lim

Sung Young Kim

The present invention provides a method for controlling a charging voltage of a 12V auxiliary battery for a hybrid vehicle, which can (1) improve charging efficiency of an auxiliary battery by increasing the output voltage of a DC-DC converter during cold start when the outside air temperature is low, (2) improve the charging efficiency of the auxiliary battery by increasing or decreasing the output power of the DC-DC converter according to the state of charge of the auxiliary battery and by increasing the output voltage of the DC-DC converter when many electrical loads are turned on, and (3) allow the DC-DC converter to provide continuous power supply for charging the auxiliary battery by turning on a main switch disposed between a high voltage battery and the DC-DC converter based on a reverse power conversion operation of the DC-DC converter even in the case where the voltage of the auxiliary battery falls below 9V.

Method for controlling charging voltage of 12V auxiliary battery for hybrid vehicle

A system for recharging a hybrid vehicle is provided with two motors and supplies commercial electricity to neutral points of the motors when a connection of a recharging stand is detected, forms an electricity loop through the neutral points of the first motor and the second motor according to a phase of the commercial electricity, and carries out a recharging mode by detecting at least a voltage of a DC link capacitor in a voltage converter, a voltage of a smoothing capacitor, and a battery voltage. According to the system, a current control value or a voltage control value is selected according to the recharging mode in order to recharge a battery based on the current control value or the voltage control value.

System of recharging battery of hybrid vehicle using diodes connected between inverter and neutral points of two motors, and commercial electricity applied to the neutral points

A system for recharging a battery in a hybrid vehicle provided with two motor is provided. If connection of a recharging connector (recharging stand) is detected, an initial activation of a controller is performed, and a DC link is pre-recharged. If the DC link is pre-recharged to a voltage higher than or equal to a predetermined voltage, an exterior AC or DC electricity is supplied to the battery so as to recharge the battery according to the present invention.

System for recharging plug-in hybrid vehicle by controlling pre-charge of a DC link

The present invention provides a motor drive system for a hybrid vehicle and a method for controlling the same in the event of a failure in a voltage converter, in which high voltage stored in a DC-link capacitor is discharged to a 12V electrical load through a DC-DC converter, of which the output voltage is increased.

Motor drive system for hybrid vehicle and method for controlling the same in the event of failure

A system for recharging a plug-in hybrid vehicle and a control method are provided to recharge a battery with exterior AC electricity plugged in. The system includes a motor operated as an electric motor or a generator, a battery in which DC voltage is stored, an inverter disposed between the motor and the battery, a plugged in exterior AC electric power source supplying electrical energy, a single phase inductor disposed between the inverter and the AC electric power source, a switch which electrically connects or disconnects the motor, a current sensor that detects current value supplying to the motor, and a controller which controls the switch to disconnect electric connection between the inductor and the motor and controls the inverter not to supply current to the phase which is not connected to the inductor when the AC electric power source is plugged in.

System for recharging plug-in hybrid vehicle and control method for the same

A method for controlling a cooling system for controlling a power converter of a hybrid electric vehicle includes: estimating the temperature of a power converter at the time of a CAN communication error as a current temperature of the power converter and controlling a cooling system at a cooling rate based on the estimated temperature; and controlling the cooling rate of the cooling system depending on whether an output of the power converter is greater than a reference value. According to the method, the cooling system can be more effectively controlled.

Method for controlling cooling of power converter for hybrid electric vehicle

Disclosed is a method for controlling a voltage of a DC link for an electric vehicle, which can reduce a capacitance of the DC link interposed between an inverter and a DC/DC converter. The method for controlling the voltage of the DC link in a power system of a vehicle including a battery, a DC/DC converter, the DC link, an inverter, a motor, and a control part controlling the DC/DC converter and the inverter includes the steps of installing a compensator in a control loop of the control part such that a DC link current of the DC/DC converter follows a DC link current of the inverter, calculating a predetermined compensation term based on information of the motor inputted into the compensator, and applying the compensation term to a voltage node in the control loop of the control part in the compensator.

Method for controlling voltage of DC link for electric vehicle

Growing community of inventors

Gyeonggi-do, South Korea

Hong Seok Song