Power inverter
First Claim
Patent Images
1. A power inverter comprising:
- a power module that converts a direct current to an alternating current; and
a capacitor module that smooths the direct current;
wherein;
the power module comprises;
a plurality of first power semiconductor devices that constitutes U-phase, V-phase and W-phase upper arms of an inverter circuit;
a plurality of second power semiconductor devices that constitutes U-phase, V-phase and W-phase lower arms of the inverter circuit;
an insulation substrate on which the plurality of first power semiconductor devices are mounted;
a power module case that encloses the plurality of first power semiconductor devices and the plurality of second power semiconductor devices and is formed in a rectangular shape including at least a first side and a second side which is disposed opposite to the first side;
a first direct current positive terminal and a first direct current negative terminal that protrude from the first side of the power module case;
a second direct current positive terminal and a second direct current negative terminal that protrude from the first side of the power module case;
an alternating current power line that protrudes from the second side of the power module case;
a positive conductor that transmits electric current flowing between the first and second direct current positive terminals and the plurality of first power semiconductor devices; and
a negative conductor that transmits electric current flowing between the first and second direct current negative terminals and the plurality of second power semiconductor devices;
the capacitor module includes a capacitor positive terminal connected to the first and second direct current positive terminals and a capacitor negative terminal connected to the first and second direct current negative terminals;
each of the positive conductor and the negative conductor includes;
an extended portion that passes through an area facing the insulation substrate with the plurality of the first power semiconductor devices therebetween;
a U-phase junction that is extended to a vicinity of a space between the U-phase first power semiconductor device and the U-phase second semiconductor device;
a V-phase junction that is extended to a vicinity of a space between the V-phase first power semiconductor device and the V-phase second semiconductor device;
a W-phase junction that is extended to a vicinity of a space between the W-phase first semiconductor device and the W-phase second semiconductor device; and
the extended portion of the positive conductor and the extended portion of the negative conductor are laminated by sandwiching an insulation member in a middle of the area.
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Accused Products
Abstract
In a power inverter, a coolant passage is fixed to a chassis to cool the chassis; the chassis is divided into a first region and a second region by providing the coolant passage in the chassis; a power module is provided in the first region as fixed to the coolant passage; a capacitor module is provided in the second region; and the DC terminal of the capacitor module is directly connected to the DC terminal of the power module.
24 Citations
5 Claims
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1. A power inverter comprising:
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a power module that converts a direct current to an alternating current; and a capacitor module that smooths the direct current;
wherein;the power module comprises; a plurality of first power semiconductor devices that constitutes U-phase, V-phase and W-phase upper arms of an inverter circuit; a plurality of second power semiconductor devices that constitutes U-phase, V-phase and W-phase lower arms of the inverter circuit; an insulation substrate on which the plurality of first power semiconductor devices are mounted; a power module case that encloses the plurality of first power semiconductor devices and the plurality of second power semiconductor devices and is formed in a rectangular shape including at least a first side and a second side which is disposed opposite to the first side; a first direct current positive terminal and a first direct current negative terminal that protrude from the first side of the power module case; a second direct current positive terminal and a second direct current negative terminal that protrude from the first side of the power module case; an alternating current power line that protrudes from the second side of the power module case; a positive conductor that transmits electric current flowing between the first and second direct current positive terminals and the plurality of first power semiconductor devices; and a negative conductor that transmits electric current flowing between the first and second direct current negative terminals and the plurality of second power semiconductor devices; the capacitor module includes a capacitor positive terminal connected to the first and second direct current positive terminals and a capacitor negative terminal connected to the first and second direct current negative terminals; each of the positive conductor and the negative conductor includes; an extended portion that passes through an area facing the insulation substrate with the plurality of the first power semiconductor devices therebetween; a U-phase junction that is extended to a vicinity of a space between the U-phase first power semiconductor device and the U-phase second semiconductor device; a V-phase junction that is extended to a vicinity of a space between the V-phase first power semiconductor device and the V-phase second semiconductor device; a W-phase junction that is extended to a vicinity of a space between the W-phase first semiconductor device and the W-phase second semiconductor device; and the extended portion of the positive conductor and the extended portion of the negative conductor are laminated by sandwiching an insulation member in a middle of the area. - View Dependent Claims (2, 3, 4, 5)
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Specification