DOUBLE-MOTOR ELECTRIC DRIVE Russian patent published in 2013 - IPC H02P5/74 

FIELD: electricity.

SUBSTANCE: double-motor electric drive comprises two induction motors with a phase rotor, to windings of rotors of which there are uncontrolled rectifiers connected, being joined in parallel, and serially with them there is an autonomous inverter connected, outputs of the autonomous inverter are connected to the winding of lower voltage of a matching transformer, to the winding of high voltage of which inputs of the uncontrolled rectifier are connected, outputs of which are connected in parallel to outputs of the uncontrolled rectifier of the frequency converter, inputs of which are connected via contacts to a supply grid, and to outputs of the uncontrolled rectifier of the frequency converter there are also the following components connected: a smoothing capacitor and inputs of the controlled inverter of the frequency converter, outputs of which are connected to parallel connected windings of motor stators.

EFFECT: increased start-up moment of motors, as a result of provision of required ratio between stator current and rotor current.

2 dwg