Patent ID: 6825625
Filing Date: 2004-11-30
Classification: G05B,H02P,Y10S

Abstract:
A method of controlling the startup of an electric motor comprisingan associated control circuit including a microprocessor (12), a nonvolatile memory (14), a data bus (13, 15) interconnecting said microprocessor and memory, and an arrangement, coupled to an output of said microprocessor, for limiting the motor current (i), the method comprising the following steps: storing, in the nonvolatile memory, a startup time (Ts) via the data bus (13, 15); switching on the motor and thereafter monitoring the start up time (Ts) of said motor; during said startup time (Ts), setting, under control of a program running in said microprocessor, a current limiting value (Iref), of the arrangement for limiting the motor current (i), to a first value (Iref=1); ascertaining expiration of said startup time (Ts) and thereafter, in a program-controlled manner, setting the current limiting value (Iref) to a second value (Iref=TST) that is different from said first value.