Patent application number | Description | Published |
20130094267 | EVEN-LEVEL INVERTER - There is provided an even-level inverter, including: a voltage-dividing circuit dividing input DC power into an even number of voltage levels; a plurality of switching devices connected to individual nodes of the voltage-dividing circuit having the even number of voltage levels; and a bidirectional switching device connected to the individual nodes of the voltage-dividing circuit through at least one of the plurality of switching devices and including at least two transistors. According to the present invention, the bidirectional switching device is implemented without a diode to thereby reduce conduction loss caused due to an anti-parallel diode included in the related art bidirectional switching device, and a neutral point of the voltage-dividing circuit is electrically separated from the switching devices to thereby control reactive power. | 04-18-2013 |
20130286698 | POWER CONVERTING APPARATUS, OPERATING METHOD THEREOF, AND SOLAR POWER GENERATION SYSTEM - There are provided a power converting apparatus and an operating method thereof, and a solar power generation system. The power converting apparatus for a solar power generation system includes: a power converting unit converting an input signal generated by a solar cell module into an output signal; and a control circuit unit controlling an operation of the power converting unit, wherein the power converting unit includes at least one transformer, and a current sensor and a switching circuit connected to a primary winding of the at least one transformer, and the control circuit unit calculates a voltage and a current of the input signal using a current of the primary winding of the at least one transformer sensed by the current sensor and performs a maximum power point tracking (MPPT) control so that the power converting unit is operated at a maximum power point. | 10-31-2013 |
20130286699 | POWER SUPPLYING APPARATUS, METHOD OF OPERATING THE SAME, AND SOLAR POWER GENERATION SYSTEM INCLUDING THE SAME - There are provided a power supplying apparatus, a method of operating the same, and a solar power generation system including the same. The power supplying apparatus includes: a power supply unit generating a direct current (DC) input signal; a main circuit unit including a plurality of flyback converter circuits connected to the power supply unit to generate a DC output signal; and a control circuit unit controlling an operation of the main circuit unit, wherein the control circuit unit connects the plurality of flyback converter circuits to each other in series or in parallel according to a level of the DC input signal. Therefore, even in the case in which the level of the DC input signal is high, a circuit maybe configured using a circuit device having a low withstand voltage range and damage and deterioration of the circuit device may be prevented. | 10-31-2013 |
20140003093 | MULTI-LEVEL CONVERTER, AND INVERTER HAVING THE SAME AND SOLAR POWER SUPPLY APPARATUS HAVING THE SAME | 01-02-2014 |
20140003108 | MULTI-LEVEL CONVERTER, AND INVERTER HAVING THE SAME AND SOLAR POWER SUPPLY APPARATUS HAVING THE SAME | 01-02-2014 |
20140085944 | DC-AC POWER CONVERTING APPARATUS AND SOLAR POWER SUPPLYING APPARATUS INCLUDING THE SAME - There are provided a DC-AC power converting apparatus including no capacitor or a small capacity capacitor for removing a ripple in an input terminal thereof by charging or discharging power according to a difference between output power and instantaneous system power of a photovoltaic cell, and a solar power supplying apparatus including the same, the DC-AC power converting apparatus including a DC-AC power converting unit converting DC power into AC power, and a charging and discharging unit charging surplus power induced when a level of the DC power is higher than that of the AC power and discharging the charged power when the level of the DC power is lower than that of the AC power. | 03-27-2014 |
20140198547 | MULTILEVEL INVERTER - There is provided a multilevel inverter capable of easily perform balancing of voltages by way of controlling switching of voltage dividing based on an offset between voltages divided by capacitors of a voltage dividing circuit. The multilevel inverter includes: a voltage dividing unit including a plurality of capacitors for dividing an input direct current (DC) voltage; an inverter unit switching the divided DC voltages to output a predetermined alternating current (AC) voltage; and a control unit providing a control signal for controlling switching of the inverter unit based on an offset between the voltages divided by the plurality of capacitors. | 07-17-2014 |
20140301113 | SOLAR POWER SUPPLY APPARATUS AND METHOD OF CONTROLLING POWER SUPPLY THEREOF - There are provided a solar power supply apparatus switching a synchronous rectifying switch instead of a snubber switch to increase power conversion efficiency, and a method of controlling power supply thereof. The solar power supply apparatus includes a power supply unit switching power input by a photovoltaic cell to convert power, synchronously rectifying and outputting the power converted depending on the power conversion switching, and suppressing surplus power generated by the power conversion switching in a snubbing operation; and a control unit controlling the synchronous rectification operation and the snubbing operation of the power supply unit depending on a spike voltage generated by the power conversion switching. | 10-09-2014 |