Ulsan National Institute of Science and Technology

Em Coretech Inc.

Em Coretech Co., Ltd.

Unist (ulsan National Institute of Science and Technology )

Sang Yeong Jeong

Jin Gook Kim

Dong Il Shin

This application relates to an independent active electromagnetic interference filter module. In one aspect, the filter module includes a first element group including a noise sensing unit provided to sense electromagnetic noise, and a second element group including a compensating unit provided to generate a compensation signal for the electromagnetic noise. The first group and the second group may be respectively mounted on different substrates. According to some embodiments, the filter module can reduce a volume of each element constituting an electromagnetic interference filter module, implement a single modularization of a compact structure. The filter module can also improve electromagnetic interference noise reduction performance and a manufacturing method thereof.

Divided active electromagnetic interference filter module and manufacturing method thereof

The present disclosure provides an active compensation device for actively compensating for noise generated in a common mode in each of at least two high-current paths. The active compensation device includes a sensing unit configured to generate an output signal corresponding to a common-mode noise signal on the high-current path, an integrated circuit (IC) unit including an amplification unit configured to output an amplified signal obtained by amplifying the output signal, and a digital circuit unit configured to output noise data into which the output signal is digitally converted, and a compensation unit configured to draw a compensation current out of the high-current path or generate a compensation voltage on the high-current path, based on the amplified signal. The noise data is provided to an external device.

Active compensation device providing electromagnetic wave noise data

This application relates to an active compensating device. In one aspect, the active compensating device includes two or more high current paths through which a second current supplied by a second device is transmitted to a first device, and a sensing unit sensing the first current on the high current paths and generating an output signal corresponding to the first current. The device may also include an amplifying unit amplifying the output signal of the sensing unit to generate an amplified current and a compensating unit generating a compensation current based on the amplified current and allowing the compensation current to flow to each of the two or more high current paths. The device may further include a first anti-disturbance unit connected in parallel to output terminals of the sensing unit, and a second anti-disturbance unit connected in parallel to input terminals of the compensating unit.

Device for compensating for current or voltage

This application relates to an active current compensation device which actively compensates for a noise occurring in a common mode in each of two or more high-current paths. In one aspect, the active current compensation device includes a sensing unit configured to generate an output signal corresponding to a common-mode noise current on each of the two or more high-current paths, and an amplification unit configured to amplify the output signal to generate an amplified current. The device may also include a compensation unit configured to generate a compensation current on the basis of the amplified current and allow the compensation current to flow to each of the two or more high-current paths, and a malfunction detection unit configured to detect a malfunction of the amplification unit. The malfunction detection unit and at least a portion of the amplification unit may be embedded in one integrated circuit (IC) chip.

Active current compensation device capable of detecting malfunction

Provided is a current compensation system for solar generators for compensating for noise using an active electromagnetic interference (EMI) filter. An inverting system for solar generators includes a solar inverter converting DC voltage to AC voltage, an EMI filter unit including an active EMI filter to reduce noise corresponding to the AC voltage, a power grid, and at least two or more through lines passing a second current from the power grid to the solar inverter and passing through the EMI filter unit, wherein the active EMI filter includes a noise sensing unit sensing a first current on the at least two or more through lines and generating an output signal corresponding to the first current, an active circuit unit amplifying the output signal to generate an amplified signal, a compensation unit generating a compensation current based on the amplified signal, and a transmission unit providing a path through which the compensation current flows to each of the at least two large current paths.

Current compensation system for photovoltaic generator, quality measurement device, measurement method thereof, and recording medium thereof

The present disclosure relates to an electromagnetic interference (EMI) filter for preventing noise emitted from a power line cable, and an isolated type active EMI filter having no additional elements on a power line. The EMI filter includes a common-mode (CM) choke disposed on a power source side, a Y-cap disposed on an EMI source side, and a sensing winding configured to sense a current. The EMI filter also includes an amplifier configured to amplify the noise current, and a transformer configured to inject a signal of the secondary coil into the Y-cap as a compensation signal.

Growing community of inventors

Ulsan, South Korea

Sang Yeong Jeong