To provide a temperature estimation system that, based on the temperature of a first object to be monitored detected by a temperature sensor, can accurately estimate the temperature of a second object to be monitored different from the first object to be monitored.SOLUTION: A control unit 20 of a temperature estimation system 1 derives the quantity of heat transferred from an intelligent power module (IPM) 11 being a first object to be monitored to a cooling route 13a of a cooling device 13 based on a first temperature estimation value being a temperature estimation value of the IPM 11 when assuming that the quantity of heat transferred from the IPM 11 to the cooling route 13a of the cooling device 13 is zero, and the temperature of the IPM 11 detected by a temperature sensor 14, and estimates a second temperature estimation value being the temperature of a capacitor 12 being a second object to be monitored based on the derived quantity of heat transferred from the IPM 11 to the cooling route 13a, and a calorific value according to the current operating state of the capacitor 12.SELECTED DRAWING: Figure 1
【課題】温度センサによって検出された第1監視対象物の温度に基づいて、第1監視対象物とは異なる第2監視対象物の温度を精度よく推定することを可能にする温度推定システムを提供する。【解決手段】温度推定システム1の制御装置20は、第1監視対象物であるIPM11から冷却装置13の冷却経路13aに伝わる熱量をゼロと仮定した場合のIPM11の温度推定値である第1温度推定値と、温度センサ14によって検出されたIPM11の温度に基づいて、IPM11から冷却装置13の冷却経路13aに伝わる熱量を導出し、導出したIPM11から冷却経路13aに伝わる熱量と、第2監視対象物であるコンデンサ12の現在の動作状態に応じた発熱量とに基づいて、コンデンサ12の温度である第2温度推定値を推定する。【選択図】図1
TEMPERATURE ESTIMATION SYSTEM
温度推定システム
2023-11-02
Patent
Electronic Resource
Japanese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01K MEASURING TEMPERATURE , Messen der Temperatur / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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