Dc-dc converter
AssigneeMitsubishi Electric Corporation
InventorsShinji HATAE, Khalid Hassan HUSSEIN
Life of this patent
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Abstract
Provided is a DC-DC converter capable of reducing not only a turn-off loss but also a turn-on loss. A snubber capacitor has one end connected to an anode of a step-up diode, a current input end of a step-up switching element and a main reactor. A first snubber diode has a cathode connected to other end of the snubber capacitor, and an anode connected to a cathode of the step-up diode. A second snubber diode has an anode connected to the cathode of the first snubber diode and other end of the snubber capacitor. A snubber reactor has one end connected to the anode of the first snubber diode, and other end connected to a cathode of the second snubber diode.
Claims31
A DC-DC converter comprising:
- a main reactor having one end and other end;
- at least one step-up switching element having a current input end connected to said other end of said main reactor, a current output end to be connected to a ground potential, and a control end that receives a control signal for controlling on/off between said current input end and said current output end;
- at least one step-up diode having an anode connected to said current input end of said at least one step-up switching element and said other end of said main reactor;
- a snubber capacitor having one end connected to said anode of said at least one step-up diode, said current input end of said at least one step-up switching element and said other end of said main reactor;
- a first snubber diode having a cathode connected to other end of said snubber capacitor, and an anode connected to a cathode of said at least one step-up diode;
- a second snubber diode having an anode connected to said cathode of said first snubber diode and said other end of said snubber capacitor;
- a snubber reactor having one end connected to said anode of said first snubber diode, and other end connected to a cathode of said second snubber diode;
- and
- a capacitor having one end connected to said other end of said snubber reactor and said cathode of said second snubber diode, and other end to be connected to said ground potential.
A DC-DC converter comprising:
- a main reactor having one end and other end;
- at least one step-down switching element having a current output end connected to said other end of said main reactor, a current input end, and a control end that receives a control signal for controlling on/off between said current input end and said current output end;
- at least one step-down diode having a cathode connected to said current output end of said at least one step-down switching element and said other end of said main reactor, and an anode to be connected to a ground potential;
- a snubber capacitor having one end connected to said cathode of said at least one step-down diode, said current output end of said at least one step-down switching element, and said other end of said main reactor;
- a first snubber diode having a cathode connected to other end of said snubber capacitor, and an anode connected to said current input end of said at least one step-down switching element;
- a second snubber diode having an anode connected to said cathode of said first snubber diode and said other end of said snubber capacitor;
- a snubber reactor having one end connected to said anode of said first snubber diode, and other end connected to a cathode of said second snubber diode;
- and
- a capacitor having one end connected to said other end of said snubber reactor and said cathode of said second snubber diode, and other end to be connected to said ground potential.
Dependencies are inferred from the claim text.