An electric motor apparatus for controlling an electric motor supplied by a source, such as a battery or a dc/dc converter. The motor apparatus comprises a controller to output a set of signals to a drive stage of the motor, where the drive stage applies a voltage to each phase of the motor to cause currents to flow in each phase of the motor corresponding to a current demand signal. A torque demand signal modifier receives a target torque demand signal and outputs an actual torque demand signal that increases in value as a function of time towards the target torque demand value following a predefined ramp selected to ensure that the maximum current gradient of the current demand does not exceed a predetermined limit. The torque demand signal modifier is arranged to modify the predefined ramp as a function of the battery voltage such that the maximum current gradient generated matches a predefined current gradient limit value. The arrangement is suitable for use in an electrically assisted power steering system.
本发明提供了一种电动马达设备,该电动马达设备包括:控制器,其被布置成产生被馈送到该马达的驱动级的一组信号作为输出,其中,该驱动级被布置成将电压施加到该马达的每个相,以使得电流在该马达的每个相中与被馈送到该控制器的电流需求信号相对应地流动;转矩需求信号修改器,其接收表示该马达需求的目标转矩的目标转矩需求信号作为输入,并且输出被转换为被馈送到该控制器的电流需求信号的实际转矩需求信号,该实际转矩需求的值随时间遵循预限定斜坡而朝目标转矩需求值增大。其中,该转矩需求信号修改器被布置成根据该电池电压修改该预限定斜坡,使得所生成的最大电流梯度与预限定电流梯度极限值相匹配。
Electric motor apparatus
电动马达设备
17.11.2020
Patent
Elektronische Ressource
Chinesisch
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / 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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