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公开(公告)号：US20190103803A1
公开(公告)日：2019-04-04
申请号：US16132685
申请日：2018-09-17
Applicant: LG Electronics Inc.
Inventor： Mun Seok SEO , Seongju KIM , Joonsik AN
Abstract: A device for stabilizing a direct current (DC) distribution system includes a capacitor unit charged by a DC voltage supplied by a power supply stage of the distribution system. The device further includes an inverter that has three pair of switching elements. The device also includes a controller that controls a plurality of switches thereof to selectively enable an inverter circuit or a voltage stabilizing circuit of the DC distribution system. The device alleviates instability of DC voltage which may be generated in a transient period, or to drive a motor connected to the device.
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Patent Agency Ranking
公开(公告)号：US20190081586A1
公开(公告)日：2019-03-14
申请号：US16124327
申请日：2018-09-07
Applicant: LG Electronics Inc.
Inventor： Seongju KIM , Mun Seok SEO , Joonsik AN
CPC classification number: H02P27/08 , F04B35/04 , H02M1/083 , H02M1/088 , H02M1/143 , H02M7/53871 , H02M2001/0058
Abstract: A device for stabilizing a direct current (DC) distribution system includes a capacitor unit charged by a DC voltage supplied by a power supply stage of the distribution system. The device further includes an inverter that has three pair of switching elements. The device also includes a voltage stabilization circuit constructed using one pair out of the three pairs of switching elements in the inverter. The device also includes a controller that controls the voltage stabilization circuit to alleviate instability of a DC voltage generated in a transient period.
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公开(公告)号：US20190089156A1
公开(公告)日：2019-03-21
申请号：US16132710
申请日：2018-09-17
Applicant: LG Electronics Inc.
Inventor： Kyung Min KIM , Joonsik AN
Abstract: A power source input device for both AC/DC power sources includes a first power source input unit that is provided at a power source input terminal of an electric power device to convert an AC or DC commercial power source selectively input from the outside into a DC driving power source and supply the converted DC driving power source to an accessory device. A second power source input unit is provided in the accessory device to supply the DC driving power source supplied from the first power source input unit to at least one load, thereby simplifying a configuration of a power source input terminal of each of the electric power devices and reducing a manufacturing cost thereof.
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公开(公告)号：US20140271272A1
公开(公告)日：2014-09-18
申请号：US14205614
申请日：2014-03-12
Applicant: LG Electronics Inc.
Inventor： Jonghyun JEON , Taeyoung PARK , Jungsong MOON , Sangyoung KIM , Joonsik AN
CPC classification number: H02P27/06 , F24F11/89 , H02M7/06 , H02M7/1552
Abstract: A power converter and an air conditioner having the same, in which the power converter includes a rectifying unit configured to rectify an input AC current and an interleave converter that has a plurality of converters and that is configured to convert rectified output from the rectifying unit to DC power and output the converted DC power. The power converter also includes a capacitor connected to an output terminal of the interleave converter, and a converter controller configured to control the interleave converter. The converter controller controls the interleave converter by calculating a load level of both terminals of the capacitor and changing a number of operating converters in the plurality of converters of the interleave converter based on the determined load level of both terminals of the capacitor.
Abstract translation: 一种功率转换器和具有该功率变换器的空调机，其特征在于，所述功率转换器包括：整流单元，被配置为对输入的交流电流进行整流;以及整流单元，具有多个转换器，并且被配置为将整流单元的整流输出转换为 直流电源并输出转换的直流电源。 功率转换器还包括连接到交织转换器的输出端的电容器和被配置为控制交错转换器的转换器控制器。 转换器控制器通过计算电容器的两端的负载电平并根据确定的电容器的两端的负载水平来改变交错转换器的多个转换器中的工作转换器的数量来控制交错转换器。
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公开(公告)号：US20210372472A1
公开(公告)日：2021-12-02
申请号：US16959753
申请日：2019-01-04
Applicant: LG ELECTRONICS INC.
Inventor： Kyung Min KIM , Joonsik AN
IPC: F16C32/04
Abstract: Magnetic bearing control device and control method are disclosed. A magnetic bearing control device according to an embodiment of the present invention comprises: a bearing control unit for outputting a plurality of switch control signals on the basis of gap information of a bearing coil and a rotor and current information applied to the bearing coil; and a coil driving unit for turning a plurality of self-formed switching elements on/off in accordance with the plurality of switch control signals and controlling the amount of current applied to the bearing coil and thus adjusting the magnetic field strength between the bearing coil and the rotor. The bearing control unit generates and outputs the plurality of switch control signals such that bootstrap capacitor charging time of the coil driving unit may be secured. Therefore, a magnetic bearing control circuit structure may be simplified by means of an additional bootstrap capacitor structure.
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6.发明申请公开(公告)号：US20190120290A1
公开(公告)日：2019-04-25
申请号：US16169311
申请日：2018-10-24
Applicant: LG Electronics Inc.
Inventor： Keun Woo JUNG , Kyung Min KIM , Jonghyun JEON , Joonsik AN
Abstract: A magnetic bearing control apparatus includes a plurality of output elements configured to generate electromagnetic force, a magnetic bearing configured to float a rotation shaft from a surface of the magnetic bearing based on the electromagnetic force generated by the plurality of output elements, at least one displacement sensor configured to sense a displacement of the rotation shaft, and a controller. The controller is configured to control a current supplied to the plurality of output elements, to control a position of the rotation shaft based on the current supplied to the plurality of output elements according to the displacement of the rotation shaft, and to determine a failure of the displacement sensor.
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