Power converter
First Claim
1. A power converter, comprising:
- a semiconductor module that includes a plurality of power semiconductor elements and converts DC power to AC power;
a capacitor for smoothing the DC power;
a DC-side connecting conductor that electrically connects the semiconductor module and the capacitor; and
a casing that houses the semiconductor module, the capacitor and the DC-side connecting conductor, wherein;
the casing includes a first upper case that has an opening, a lower case that closes the opening of the first upper case, and a second base held by the first upper case;
the semiconductor module is fixed to the second base in a space between the first upper case and the second base via a first base that forms a coolant passage;
the capacitor is disposed in a space between the second base and the lower case;
an opening is formed in the second base at a position facing a space between a side of the first base and an inner wall of the first upper case; and
the DC-side connecting conductor passes through the opening of the second base and extends through the space between the side of the first base and the inner wall of the first upper case so as to connect the semiconductor module and the capacitor.
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Accused Products
Abstract
The object is to provide a power converter which is capable of minimizing an extent to which the power converter components other than the semiconductor module are thermally affected by the heat originating from the semiconductor module.
A casing houses: semiconductor modules 20, 30 constituting a main circuit for power conversion; a capacitor 50 electrically connected to the main circuit; drive circuits 70, 71 that provide main circuit with a drive signal used in power conversion operation; a control circuit 74 that provides the drive circuit with a control signal used to prompt the drive circuit to provide the drive signal. Within the casing, a cooling chamber including a coolant passage 28 is formed, and a chamber wall of the cooling chamber is formed with a thermally conductive material. At least the semiconductor modules 20, 30 are housed inside the cooling chamber, and at least the capacitor 50 and the control circuit 74 are disposed outside the cooling chamber
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Citations
7 Claims
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1. A power converter, comprising:
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a semiconductor module that includes a plurality of power semiconductor elements and converts DC power to AC power; a capacitor for smoothing the DC power; a DC-side connecting conductor that electrically connects the semiconductor module and the capacitor; and a casing that houses the semiconductor module, the capacitor and the DC-side connecting conductor, wherein; the casing includes a first upper case that has an opening, a lower case that closes the opening of the first upper case, and a second base held by the first upper case; the semiconductor module is fixed to the second base in a space between the first upper case and the second base via a first base that forms a coolant passage; the capacitor is disposed in a space between the second base and the lower case; an opening is formed in the second base at a position facing a space between a side of the first base and an inner wall of the first upper case; and the DC-side connecting conductor passes through the opening of the second base and extends through the space between the side of the first base and the inner wall of the first upper case so as to connect the semiconductor module and the capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification