field-oriented control method for an electric drive and operation for a drive to pull an object, electric motor arrangement, and, position and / or speed controller for field-oriented control of an electric drive

摘要

field-oriented control methods for an electric drive and operation for a drive to pull an object, electric motor arrangement, and position and / or speed controller for the field-oriented control of an electric drive. the invention relates to a field-oriented method for controlling an electric drive comprising a plurality of electric motors, for example, to implement a traction mechanism, especially for load and / or gear cable means. in the control method, measurements are taken from a real multi-phase motor current. the measured values are transformed into a direct current component and a quadrature current component, based on a magnetic rotor field angle or flow angle, in a rotor based d, q coordinate system. the measured quadrature current component is compared with a predetermined transverse current component of a current command value, to obtain a command value for motor current control. the invention also relates to an electric motor arrangement, which is especially suitable for implementing the control method, with at least two electric motors that can be operated as multi-phase motors. the invention also relates to a position and / or speed controller for the field-oriented control of an electric drive, which is especially suitable for use in the above mentioned control method or in the above mentioned electric motor arrangement. the invention also relates to a starting method for a traction drive and, therefore, an arrangement for preparing electric motors.