Power conversion system with dual permanent magnet generator having prime mover start capability

DETAILED DESCRIPTION In accordance with the present invention, a dual permanent magnet generator is used in a starting/generating system so that size and weight can be reduced and other advantages can be realized.
More particularly, a starting/generating system operable in a starting mode and in a generating mode includes a dual permanent magnet generator (DPMG) having a motive power shaft and an armature winding, a power converter having an input and an output and relays operable in the starting mode to connect the output of the power converter to the DPMG armature winding and operable in the generating mode to connect the input of the power converter to the DPMG armature winding.
Means are operable in the starting mode for controlling the power converter whereby the DPMG is operated as a motor to produce motive power at the motive power shaft and means are operable in the generating mode for controlling the power converter whereby the electrical power developed in the DPMG armature winding is converted into output power.
Preferably, the starting/generating system is operable in combination with a prime mover coupled to the motive power shaft wherein motive power produced by the DPMG during operation in the starting mode is supplied to the prime mover to bring the prime mover up to self-sustaining speed and wherein motive power produced by the prime mover during operation of the generating mode is supplied to the DPMG.
Also preferably, the starting/generating system is operable in combination with a source of AC power coupled to the first input/output of the power converter during operation in the starting mode.
The DPMG may be of any type, including one having dual permanent magnet rotor structures on a rotor thereof and a stator armature winding or one in which a single permanent magnet rotor structure is disposed on the rotor and dual series-connected armature windings are disposed in the stator.
The DPMG may even be of the type where armature windings are disposed on the rotor and one or more permanent magnet structures are disposed in the stator