In overheat protection of a current control circuit for controlling a drive current for driving a load, the accuracy of estimating the component temperature of an electronic component included in the current control circuit is improved. A component temperature estimation unit (61e2, 61g) estimates a first component temperature (Teg), which is a component temperature of a first electronic component (La), on the basis of current values (I1ad-I1cd) detected or estimated by a current detection unit and a detection temperature (SdA1) detected by a temperature detection circuit (45). A second component temperature (Tee2), which is the component temperature of the second electronic component (QC2), is estimated on the basis of the current values (I1ad-I1cd), the detection temperature (SdA1), and the first component temperature (Teg).

    在对驱动负载的驱动电流进行控制的电流控制电路的过热保护中,提高电流控制电路所包含的电子部件的部件温度的推定精度。部件温度推定部(61e2、61g)基于电流检测部检测或推定出的电流值(I1ad~I1cd)、温度检测电路(45)检测出的检测温度(SdA1)推定出作为第一电子部件(La)的部件温度的第一部件温度(Teg),基于电流值(I1ad~I1cd)、检测温度(SdA1)和第一部件温度(Teg)推定出作为第二电子部件(QC2)的部件温度的第二部件温度(Tee2)。


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    Title :

    Current control device, motor control device, and electric power steering device


    Additional title:

    电流控制装置、马达控制装置以及电动助力转向装置


    Contributors:

    Publication date :

    2024-10-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B62D MOTOR VEHICLES , Motorfahrzeuge



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