Method and apparatus for reducing a current break in a leg that is not participating in the commutation of a three-phase block current fed synchronous machine

摘要

A method for reducing a current break in a leg of a three- phase block current-fed synchronous machine that is not participating in a commutation while the currents in the other two legs are commutating. A triangular high frequency sampling voltage from a pulse frequency generator of a control unit for the converter that feeds the synchronous machine is always shorted at the beginning of the commutation for a predetermined synchronization time. The torque ripple of a three-phase feed drive is reduced using this method and the circuit arrangement for carrying out the method.