Abstract: A switching element driving method executed in a switching element driving device including a plurality of switching elements and a driving circuit configured to drive the plurality of switching elements, the switching element driving method including: detecting temperatures of the plurality of switching elements; calculating a switching determination temperature that serves as a reference for changing switching speeds of the switching elements from the plurality of detected temperatures; and changing the switching speeds of all the switching elements based on the switching determination temperature.

Abstract: A switching element driving method executed in a switching element driving device including a plurality of switching elements and a driving circuit configured to drive the plurality of switching elements, the switching element driving method including: detecting temperatures of the plurality of switching elements; calculating a switching determination temperature that serves as a reference for changing switching speeds of the switching elements from the plurality of detected temperatures; and changing the switching speeds of all the switching elements based on the switching determination temperature.

Abstract: A device protection apparatus comprises, a refrigerant temperature sensor for detecting a temperature of a refrigerant used for cooling a device including a heat-generation part, a plurality of device temperature sensors for detecting a temperature of the device, a controller that applies drive limitation to the device based on a detected refrigerant temperature detected by the refrigerant temperature sensor and a detected temperature detected by the device temperature sensors.

Abstract: A device protection apparatus comprising a first sensor for detecting temperature of a refrigerant used for cooling a device including a heat-generation part, a second sensor for detecting temperature of the device, and a controller 10 that applies drive limitation to the device based on a first detected temperature detected by the first sensor and a second detected temperature detected by the second sensor, wherein the controller 10 calculates a temperature difference between the first detected temperature and second detected temperature, applies drive limitation to the device when the temperature difference is higher than a predetermined temperature difference threshold value, and applies drive limitation to the device when the second detected temperature is higher than a predetermined first temperature threshold value.

Abstract: A device protection apparatus comprising a first sensor for detecting temperature of a refrigerant used for cooling a device including a heat-generation part, a second sensor for detecting temperature of the device, and a controller 10 that applies drive limitation to the device based on a first detected temperature detected by the first sensor and a second detected temperature detected by the second sensor, wherein the controller 10 calculates a temperature difference between the first detected temperature and second detected temperature, applies drive limitation to the device when the temperature difference is higher than a predetermined temperature difference threshold value, and applies drive limitation to the device when the second detected temperature is higher than a predetermined first temperature threshold value.

Abstract: A temperature abnormality detection method is provide for a power conversion device which includes calculating a temperature difference between a first inverter temperature and a cooling water temperature, and then determining a temperature abnormality exists when a first abnormality determination condition is satisfied, i.e., when the temperature difference exceeds a preset difference threshold and the first inverter temperature exceeds a preset power conversion unit threshold temperature.

Abstract: A temperature abnormality detection method is provide for a power conversion device which includes calculating a temperature difference between a first inverter temperature and a cooling water temperature, and then determining a temperature abnormality exists when a first abnormality determination condition is satisfied, i.e., when the temperature difference exceeds a preset difference threshold and the first inverter temperature exceeds a preset power conversion unit threshold temperature.

Abstract: A semiconductor device includes an electric conduction portion having a flat plate shape, a semiconductor element being arranged vertically over the electric conduction portion and being electrically connected thereto, a casing whose lower portion of an inner wall has a coupling portion coupled with a circumferential edge portion of the electric conduction portion and whose upper portion of the inner wall surrounds the whole circumference of the electric conduction portion and a sealing material that vertically downwardly encapsulates the semiconductor element and the electric conduction portion. The electric conduction portion and the casing are integrally molded, and a space having a shape coupled to a circumferential edge portion of the electric conduction portion is provided in the lower portion of the inner wall of the casing as the coupling portion.