STATIC FREQUENCY multilevel converter for powering synchronous motors

摘要

The invention relates to electrical engineering, electric drive and may be used for starting and speed control of high voltage synchronous motors. Static multilevel inverter to supply the synchronous motors comprising multiwinding power transformer and a multi-level inverter, the number of secondary windings of the multiple power transformer corresponds to the number of inverters in the composition of the multilevel inverter introduced an additional secondary winding from which the powered exciter device for generating a controlled drive current that is supplied a field winding synchronous motor. The use of static frequency converter for multilevel synchronous electric power will eliminate the use of a separate transformer, to reduce the overall dimensions of the system, to increase reliability by eliminating the converter transformer, switching devices and cable lines and reduce electromagnetic interference introduced into the electricity network. Control circuit forming the controlled field current will keep the electric network enterprise required value of power factor.