The development of a complete self-commissioning, self-tuning vector controlled drive

An important aspect to the design and implementation of an indirect vector control scheme is commissioning phase for the drive. Invariably, on-line tuning of T_r is required and this will ultimately depend on estimates of the other electrical parameters of the motor, derived from some form of commissioning tests. At present these tend to take the form of specific tests carried out by a commissioning engineer, which can be a time consuming task. Several schemes have been proposed to provide fully automated commissioning tests whereby identification of the electrical and mechanical parameters is performed with the minimum of user interaction. These are not particularly well developed in industrial drives at the present time, and this is surprising since many manufacturers utilise a high performance processor as a command editor. This tends to be used as the passive object of a commissioning manual and should be better exploited to provide the management for self-commissioning, self-tuning and self monitoring functions and therefore be able to impart information to the user. This paper describes the operation of such a management structure and the provision for on-line T_r identification under dynamic torque and flux operating conditions. The resultant operation of the `intelligent vector drive´ is illustrated