Abstract:
PROBLEM TO BE SOLVED: To provide an electric power conversion system with high efficiency and insulation type.SOLUTION: The electric power conversion system comprises: a series circuit comprised of a DC power supply 100, a primary coil and an MERS 120; a secondary coil 132 electromagnetically connected with the primary coil 131; and a load 180 connected with the secondary coil 132. At a capacitor CM of the MERS 120, a voltage higher than a voltage of the DC power supply 100 is generated. A voltage of a capacitor CM alternates correspondingly to on-off operations of the MERS 120 and is applied to the primary coil 131. Thus, an electric current flows through the secondary coil 132 and electric power is supplied to the load 180.
Abstract:
PROBLEM TO BE SOLVED: To provide a low-loss current-fed series resonance DC/DC converter that can bi-directionally supply DC power and can perform soft switching with simple control regardless of power supply output voltage.SOLUTION: The current-fed series resonance DC/DC converter discharges electrostatic energy accumulated on capacitors CM1 and CM2 by turning on MERSs 101 and 102 to accumulate the energy on an inductor Lm as magnetic energy, and accumulates the magnetic energy accumulated on the inductor Lm onto a capacitor on the power receiving side by turning off the MERS on the power receiving side earlier than the MERS on the power supplying side, and charges a battery on the power receiving side with the electrostatic energy accumulated on the capacitor.
Abstract:
PROBLEM TO BE SOLVED: To provide a power conversion equipment which can supply a load with an AC current having desired frequency from an AC voltage source, has small change in the peak value of the voltage supplied to the load, and in which loss is low, and to provide a control method of the power conversion equipment.SOLUTION: A power conversion equipment 10 comprises: reactor Lacs 1 to 3 connected to each phase of a three-phase AC power supply 21; a three-phase bridge MERS 100; a DC AC conversion circuit 200; and a control circuit 300. The control circuit 300 controls on/off of six reverse conduction type semiconductor switches constituting the three-phase bridge MERS 100 in order to repeatedly generate a DC voltage of pulse format in a capacitor CM of the three-phase bridge MERS 100. The DC voltage of pulse format generated in the capacitor CM is converted into AC voltage via the DC AC conversion circuit 200 so as to be applied to inductive loads LD1, LD2, and LD3.
Abstract:
PROBLEM TO BE SOLVED: To provide a solar panel booster with high efficiency and insulation type and photovoltaic power generation system.SOLUTION: The electric power conversion system comprises: a series circuit comprised of a DC solar panel 100, a primary coil 131 and an MERS 120; a secondary coil 132 electromagnetically connected with the primary coil 131; and a DC bus-bar 180 connected with the secondary coil 132. At a capacitor CM of the MERS 120, a voltage higher than a voltage of the solar panel 100 is generated. A voltage of a capacitor CM alternates correspondingly to on-off operations of the MERS 120 and is applied to the primary coil 131. Thus, an electric current flows through the secondary coil 132 and electric power is supplied to the DC bus-bar 180.