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    • 9. 发明公开
    • Softstarter device and method for an electric motor
    • 软起动器Vorrichtung und Verfahrenfüreinen Elektromotor
    • EP2293426A1
    • 2011-03-09
    • EP09169226.9
    • 2009-09-02
    • Carlo Gavazzi Services AG
    • Balcon, ClaudioDemicoli, JasonEllul, ThomasGalea, JohannGalea, RogerPerot, MauroVedana, Francesco
    • H02P1/04H02P1/18H02P1/26H02P1/46H02P23/14
    • H02P1/04H02P1/18H02P1/26H02P1/46H02P23/14
    • The invention refers to a self adapting soft starter device and a method to control the softstarting of an electric motor. The self-adapting soft starter device (1) comprises an electric current limiting means (2,4,S11) adapted to limit the electric current supplied to the motor (M) to a preset maximum current limit, a ramp-up time determination means (3A,3B,4) adapted to determine the actual ramp-up time of the electric motor (M), a storing means (6,4,S10) adapted to store a preset minimum ramp-up time, a comparing means (4,S17,S21) adapted to compare the determined actual ramp-up time with said preset reference ramp-up time, a replacing means (4,S18,S22) adapted to replace said preset maximum current limit with an auto-adapted current limit based upon the outcome of the comparison between the determined actual ramp-up time and the said preset reference ramp-up time. The soft-starter therefore automatically optimizes the maximum current limit driven by the motor to match its load requirements. This is particularly useful to cater for load variations with time during the lifetime of the product in the application, as it avoids the need of any human intervention to change the soft-starter settings. This auto-adaptation also extends motor lifetime by reducing wear and tear.
    • 本发明涉及一种自适应软启动器装置和一种控制电动机软起动的方法。 自适应软起动装置(1)包括适于将供给电动机(M)的电流限制在预设最大电流极限的电流限制装置(2,4,S11),斜坡上升时间确定装置 适于确定电动机(M)的实际斜坡上升时间的适配器(3A,3B,4),适于存储预设的最小上升时间的存储装置(6,4,S10),比较装置 ,S17,S21),其适于将确定的实际斜坡上升时间与所述预设参考斜坡上升时间进行比较;替换装置(4,S18,S22),其适于用自适应电流限制替换所述预设最大电流限制 在所确定的实际斜坡上升时间与所述预设参考上升时间之间进行比较的结果。 因此,软启动器自动优化由电机驱动的最大电流限制以匹配其负载要求。 这对于在应用中的产品的使用寿命期间随着时间的变化而特别有用,因为它避免了任何人为干预来改变软启动器设置。 这种自动调整还通过减少磨损和延长来延长电机寿命。