Patent ID: 8303171
Filing Date: 2012-11-06
Classification: H02M,H05K

Abstract:
1. A cooling capacity measurement method for an inverter device that includes an alternating current-direct current conversion unit that converts an alternating current input into a direct current, a smoothing capacitor that smoothes the output of the alternating current-direct current conversion unit, and a direct current-alternating current conversion unit that converts a direct current input into an alternating current, a cooling fin that carries a heat-generating component constituting the alternating current-direct current conversion unit and the direct current-alternating current conversion unit, and a temperature detection mechanism that detects a temperature of the cooling fin, wherein the cooling capacity measurement method comprises: obtaining a temperature detection value from the temperature detection mechanism; and determining a decrease in cooling capacity based on a variation amount of a temperature detection value obtained from the temperature detection mechanism after the inverter device has made a transition from an operating state to a stopped state.