Patent ID: 8602645
Filing Date: 2013-12-10
Classification: G01K

Abstract:
1. A temperature detection system comprising: a power semiconductor device; chip temperature detection means for detecting a temperature of the power semiconductor device, the chip temperature detection means being coupled to the power semiconductor device; power loss-related characteristic value acquiring means for measuring at least one of a current and a voltage of the power semiconductor device to acquire a power loss-related characteristic value of the power semiconductor device, the power loss-related characteristic value including at least one of a driving frequency, a current value, a voltage value, and a power value of the power semiconductor device; difference value calculating means for calculating a difference value between an actual temperature of the power semiconductor device and the temperature of the power semiconductor device detected by the chip temperature detection means, based on the power loss-related characteristic value and a stored correlation that relates the power loss-related characteristic value to the actual temperature and the temperature detected by the chip temperature detection means; corrected temperature signal generating means for generating a corrected temperature signal by adding the temperature detected by the chip temperature detection means and the difference value calculated based on the power loss-related characteristic value of the power semiconductor device; and output means for outputting the corrected temperature signal.