Hyundai Motor Company

Lg Chem, Ltd

Electronics and Telecommunications Research Institute

Kia Motors Corporation

Kia Corporation

Other

Ipg Electronics 502 Limited

Dae Woo Lee

Jong Dae Kim

Jae Bum Seo

Tae Moon Roh

Jung Tae Park

Woo Young Lee

Gyu Sun Kim

Yil Suk Yang

In Yong Yeo

Tae Jong Ha

Jin Young Yang

Chang Hun Han

Jin Myeong Yang

Ji Uk Jang

Byung Gu Kang

Jae Eun Cha

Il Yong Park

Byeong Cheol Song

Sang Gi Kim

Youn Sik Lee

Min Seong Choi

Sung Ku Kwon

Byoung Il Kang

Da Eun Sung

Eun Jung Choi

Jin Gun Koo

Byeong Seob Song

Inyong Yeo

Byoung Gon Yu

Young Kyun Cho

Jong Pil Kim

Seong Lyong Kim

Jun Ho Kim

Si Hun Yang

Gyu Yeong Choe

Hwan Wook Baek

Oh Young Kwon

In Soo Kim

Hyung Sub Lee

Sung Won Hong

Min Cheol Ju

Sihun Yang

Min Seung Shin

JaeEun Cha

Joon Hwi Jo

Jiuk Jang

Tae Hoon Kim

Jun Young Lee

Jae Kyoung Mun

Young Jin Kim

Sang Choon Ko

Sang Heung Lee

Ik Jae Chun

Kun Ji Kim

Se Woong Lee

Hyun Kyou Ha

Youngjin Kim

Ho Young Kim

Seong Yong Ahn

Soon Il Yeo

Heung Kwon Bae

Jung Rae Lee

Sung Il You

Chun Gi Lyuh

Byoung-Gon Yu

Kee Soo Nam

Sungwon Hong

JinYoung Yang

Dea Ki Cheong

Suk Jo Choi

Byung Kyu Park

Seong Jae Shin

Kyu-Seok Lee

Gyu Hyun Kim

Taejong Ha

Yong Il Jun

Hyun Seok Yang

Woo Ri Kim

Hyun Jun Ryu

Chul Won Ju

Han Jong You

Il-yong Park

Insoo Kim

Seongjae Shin

Roh Tae Moon

Yang Yil Suk

Ii Yong Park

Minseung Shin

II-Young Park

Mincheol Ju

Jong Pill Kim

The present disclosure relates to a method of preparing a graft polymer, which includes: performing primary continuous polymerization by adding a diene-based rubber polymer and an aromatic vinyl-based monomer to a first reactor; and performing secondary continuous polymerization by adding the polymerization product discharged from the first reactor, a maleimide-based monomer, and a vinyl cyanide-based monomer to a second reactor.

Method of preparing graft polymer

Disclosed is a method for producing a diene-based graft copolymer resin, and a diene-based graft copolymer resin produced therefrom, the method including: adding, into a reactor, a polymerization solution containing a diene-based rubber polymer, an aromatic vinyl-based monomer, a vinyl cyan-based monomer, a polymerization initiator, and a reaction solvent, and polymerizing the polymerization solution to prepare a polymer; recovering a solution containing unreacted monomers and a reaction solvent from the polymerization solution, dispersing a releasing agent in the recovered solution, and then adding the solution into the front end of a volatilization tank; and removing the unreacted monomers and the reaction solvent from the volatilization tank.

Method for producing diene-based graft copolymer resin and diene-based graft copolymer resin

A thermoplastic resin composition of the present invention includes 65 to 85% by weight of a heat-resistant copolymer (A) containing 76 to 92% by weight of a (meth)acrylic acid alkyl ester compound, 1 to 8% by weight of an N-substituted maleimide compound, and 5 to 16% by weight of an aromatic vinyl compound; 10 to 30% by weight of an acrylate-based rubber-aromatic vinyl compound-vinyl cyanide compound graft copolymer (B) containing acrylate-based rubber having an average particle diameter of 50 to 200 nm; and 1 to 15% by weight of an acrylate-based rubber-aromatic vinyl compound-vinyl cyanide compound graft copolymer (C) containing acrylate-based rubber having an average particle diameter of 300 to 600 nm. In this case, in the heat-resistant copolymer (A), the weight ratio of the aromatic vinyl compound to the N-substituted maleimide compound is 1.5 to 8.

Thermoplastic resin composition, method of preparing the same, and molded article including the same

Head lamp for automobile

A vehicle power conversion system includes an input power supply including an AC power input, a battery, a power factor correction circuit connected to the input power supply, a power transmission unit including an inverter connected in parallel to the battery, a three-phase motor connected to the inverter, and at least one relay connected to the three-phase motor and configured to transfer power between the input power supply and the battery, and a buck converter including a first switching element and a second switching element, connected in parallel to the power factor correction circuit, wherein an end of the second switching element is connected in parallel to the power transmission unit, and wherein the buck converter is configured to step down an output voltage of the power factor correction circuit and transfer the stepped down output voltage.

Vehicle power conversion system and method

An embodiment vehicle includes a DC/DC converter having a first power terminal connected to a first electrode of a first battery, a second power terminal connected to a first electrode of a second battery, and a load terminal connected to a first end of an electric load, and including a switching circuit, a transformer, and a rectifier circuit, and a controller configured to set an operation mode of the DC/DC converter to a low-voltage DC/DC converter (LDC) mode or a state-of-charge (SOC) balancing mode, wherein the DC/DC converter is configured to step down a voltage of the first power terminal through the switching circuit, the transformer, and the rectifier circuit and output the voltage to the load terminal when the LDC mode is performed and to control power transfer between the first and second power terminals through the switching circuit when the SOC balancing mode is performed.

Vehicle for converting power of battery and method of controlling the same

The present invention relates to a method for producing a diene-based graft copolymer resin, and a diene-based graft copolymer resin produced therefrom, the method including: mixing an aromatic vinyl-based monomer, a diene-based rubber polymer, and a polymerization initiator to prepare a first reactant; mixing a vinyl cyan-based monomer and an antioxidant to prepare a second reactant; adding and polymerizing the first reactant and the second reactant into a polymerization reactor to prepare a polymer; and removing unreacted monomers in a devolatilization tank.

The present invention relates to a method of preparing a polymer, which includes: adding a first reaction solution including an aqueous solvent and a monomer mixture including an alkyl-substituted aromatic vinyl-based monomer, an alkyl-unsubstituted aromatic vinyl-based monomer, and a vinyl cyanide-based monomer to a reactor and initiating polymerization; and performing polymerization by continuously adding an alkyl-substituted aromatic vinyl-based monomer to the reactor, wherein the first reaction solution satisfies Expression 1 (see the description of the invention).

Method of preparing polymer

Provided is a polymer production method including: batch-adding a reaction solution including a monomer mixture including a maleimide-based monomer, a vinyl aromatic monomer, and a vinyl cyanide-based monomer and an aqueous solvent to a reactor and initiating polymerization; and carrying out the polymerization while continuously adding the maleimide-based monomer and the aqueous solvent to the reactor, wherein the reaction solution satisfies the above Formula 1.

Polymer production method

The present invention relates to a method for preparing a vinyl chloride-based polymer, including: bulk polymerizing a vinyl chloride-based monomer in a polymerization reactor to prepare a vinyl chloride-based polymer; and adding water and vapor to the polymerization reactor, and heating to remove an unreacted vinyl chloride-based monomer, wherein an addition amount of the water is 0.500 to 5.000 parts by weight based on 100 parts by weight of the vinyl chloride-based polymer.

Method for preparing vinyl chloride-based polymer

An embodiment apparatus includes a converter including a plurality of switching elements configured as a bridge circuit connected to an input terminal and having a plurality of bridge arms, wherein a topology of the converter is configured to be switchable to a full-bridge type topology or a half-bridge type topology, and wherein a resonant capacitor is connected to a midpoint between respective ones of the bridge arms, and a controller configured to switch the topology of the converter to the full-bridge type or the half-bridge type by controlling whether the resonant capacitor is activated based on a load current of the converter.

Apparatus and method for controlling converter

The present disclosure relates to an apparatus and a method for controlling an LLC resonance converter. The apparatus includes a converter connected to an input terminal, including a plurality of switching elements constituting a bridge circuit, and enabling a topology change in the form of a full bridge and a half bridge; and a controller detecting a charge measurement value of a battery being charged with a power transferred by the converter, and changing a topology of the converter based on the charge measurement value. Since battery charging is performed by changing the topology of the converter in accordance with the charge measurement value of the battery, the LLC resonance converter can be controlled at an optimized frequency, the efficiency is increased, and cost savings can be achieved.

Apparatus and method for controlling LLC resonance converter

A planar transformer may include a primary printed circuit board (PCB) having at least a hole in which a first core and a second core are inserted and including a coil pattern, a secondary PCB having at least a hole in which the first core and the second core are inserted and including a coil pattern, and a heat dissipation plate disposed between the primary PCB and the secondary PCB and including at least a hole in which the first core and the second core are inserted.

Planar transformer having heat sink

The present invention relates to a thermoplastic resin composition, which includes a first copolymer formed by polymerizing a monomer mixture of a (meth)acrylate-based monomer, a vinyl cyan-based monomer and a maleimide-based monomer, and having a refractive index of 1.5170 or less and a glass transition temperature of 115.0° C. or more; and a second copolymer formed by graft-copolymerizing an aromatic vinyl-based monomer and a vinyl cyan-based monomer onto an acrylic rubber polymer, and the thermoplastic resin composition according to the present invention has improved heat resistance, colorability and scratch resistance.

Thermoplastic resin composition

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Daejeon, South Korea

Dae Woo Lee