METHOD OF STAT-UP AND BRUSHLESS EXCITATION FOR NON-CONTACT ASYNCHRONOUS MACHINE Russian patent published in 2013 - IPC H02P1/04 H02P1/46 

FIELD: electricity.

SUBSTANCE: three-phase alternating voltage is supplied from external network to stator winding; rotor of synchronous machine is brought to rotation and voltage is supplied to excitation winding of synchronous machine from semiconductor converter. Stator winding of exciter is connected to external source of three-phase alternating voltage to minimum number of poles in order to bring rotor to rotation; revolutions of synchronous machine rotor are controlled till subsynchronous rate is reached and then stator winding is connected to direct current source to maximum number of poles. At that value of DC voltage is set to less value than the actual value of AC voltage.

EFFECT: providing start-up and expanding functional capabilities of special-purpose synchronous machine, reducing consumption of materials, increasing efficiency factor, simplifying and reducing material consumption for exciter manufacturing.

3 dwg