Patent ID: 9219425
Filing Date: 2015-12-22
Classification: B60L,H02M

Abstract:
1. An electric power converter comprising: a plurality of semiconductor modules that have a semiconductor element therein; a cooler that cools the semiconductor modules; a single circuit board provided with a semiconductor control circuit that controls the semiconductor modules; a capacitor electrically connected to the semiconductor modules; and a quick discharge resistor for discharging an electric charge accumulated in the capacitor; wherein: the single circuit board is provided with a discharge control circuit that controls a current that flows into the quick discharge resistor; the semiconductor modules, the cooler, the capacitor, and the quick discharge resistor are disposed on one major surface of the single circuit board; the discharge control circuit is formed on the single circuit board together with the semiconductor control circuit; the discharge control circuit is configured to permit the current to flow into the quick discharge resistor in an emergency situation; the cooler includes a plurality of cooling pipes; the plurality of semiconductor modules and the plurality of cooling pipes are laminated to constitute a laminated body; the quick discharge resistor is disposed at one end side of a laminating direction of the laminated body; the laminated body is disposed inside of a metal frame which includes a rear wall part disposed in one side of the lamination direction and a front wall part disposed in another side of the lamination direction; a resistor accommodation part is formed in the rear wall part of the frame and accommodates the quick discharge resistor; and the cooling pipes disposed on one end side of the laminated body are contacted surface-to-surface to the rear wall part of the frame.