AC switching arrangement
AssigneeGridon Ltd.
InventorsUri Garbi, Dvir Landwer, Alex Oren, Vladimir Rozenshtein
Life of this patent
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Abstract
An AC switching arrangement is provided with an energy transfer arrangement connected in parallel with a switching mechanism. The energy transfer arrangement comprises a capacitance arrangement and a diode arrangement. The switching mechanism normally closed in a first state, and on reception of a signal indicating the second state, the switching mechanism is arranged to open. When the switching mechanism is in the second state, the diode arrangement is arranged in each AC half cycle to enable energy (source energy, stored inductance energy, etc.) to transfer from the grid to the capacitance arrangement but to prevent energy transfer from the capacitance arrangement back to the grid.
Claims5
An AC switching arrangement for connection to an AC grid, the AC switching arrangement comprising:
- a first grid terminal connectable to a first node in the AC grid and a second grid terminal connectable to a second node in the AC grid;
- a switching mechanism connected in series between the first grid terminal and the second grid terminal, wherein the first switching mechanism includes a first switch, and wherein the first switch is closed in a first state and open in a second state;
- an energy transfer arrangement connected in parallel with the first switch, the energy transfer arrangement comprising a capacitance arrangement and a diode arrangement;
- wherein, on reception of a signal indicating the second state, the switching mechanism is arranged to open the first switch;
- wherein, when the first switch is in the second state, the diode arrangement is arranged in each AC half cycle to enable energy to transfer from the AC grid to the capacitance arrangement but to prevent energy transfer from the capacitance arrangement back to the AC grid,
- wherein the switching mechanism comprises a first switch and a second switch connected in series, wherein the first and second switches are arranged to open and close at the same time;
- wherein the diode arrangement comprises first and second diodes, each having an anode and a cathode, and the capacitance arrangement comprises a capacitance having a first terminal and a second terminal,
- wherein the anode of the first diode is connected to the first grid terminal and the cathode of the first diode is connected to the first terminal of the capacitance, and wherein the anode of the second diode is connected to the second grid terminal and the cathode of the second diode is connected to the first terminal of the capacitance;
- wherein the second terminal of the capacitance is connected to a node that is between the series connected first and second switches;
- and
- wherein the first and second switches respectively comprise IGBT modules.
Dependencies are inferred from the claim text.