Power converter apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsKazuhiro Satoh, Ryo Nakajima, Kosaku Ichikawa
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Abstract
A power converter apparatus, including a DC power source, a semiconductor stack, connected to the DC power source in parallel, having a plurality of semiconductor devices and a cooler for refrigerating the semiconductor devices, the semiconductor devices and the cooler are stacked and pressured to each other, and a snubber circuit, connected to the DC power source in parallel, having a serial circuit of a capacitor and a diode, and a resistor connected in parallel to the diode, one terminal of the capacitor is disposed adjacent to the semiconductor stack so that magnetic flux generated by current flowing in the terminal cancels magnetic flux caused by current flowing in the semiconductor stack.
Claims9
A power converter apparatus, comprising:
- a DC power source;
- a semiconductor stack, connected to said DC power source in parallel, having a plurality of semiconductor devices and a cooler for refrigerating said semiconductor devices, said semiconductor devices and said cooler are stacked and pressured to each other;
- and
- a snubber circuit, connected to said DC power source in parallel, having a serial circuit of a capacitor and a diode, and a resistor connected in parallel to said diode,
- one terminal of said capacitor is disposed adjacent to said semiconductor stack so that magnetic flux generated by current flowing in said terminal cancels magnetic flux caused by current flowing in said semiconductor stack.
A power converter apparatus, comprising:
- a DC power source having a positive electrode, a negative electrode and a neutral point;
- a semiconductor stack, connected to said DC power source in parallel, having a first cooler coupled to said positive electrode, a second cooler coupled to said negative electrode and a plurality of semiconductor devices, said semiconductor devices and said first and second coolers are stacked and pressured to each other;
- a first snubber circuit, connected between said positive electrode and said neutral point, having a first serial circuit of a first capacitor and a first diode, and a first resistor connected in parallel to said first diode;
- and
- a second snubber circuit, connected between said negative electrode and said neutral point, having a second serial circuit of a second capacitor and a second diode, and a second resistor connected in parallel to said second diode,
- one terminal of said first capacitor and one terminal of said second capacitor are disposed adjacent to said semiconductor stack so that magnetic flux generated by current flowing in said terminals of said first and second capacitors cancels magnetic flux caused by current flowing in said semiconductor stack.
Dependencies are inferred from the claim text.