H - Electricity – 02 – P
Patent
H - Electricity
02
P
318/13
H02P 5/46 (2006.01) H02K 17/28 (2006.01) H02P 5/74 (2006.01)
Patent
CA 1182514
ABSTRACT An arrangement to provide variation of the speed or other operating parameters of two or more coupled electrical machines without connection to the rotors. The machines are of the induc- tion type each having a winding in separate parts to create a flux movable in the air gap at different speeds by the alteration of current in a part of the winding. The rotors of the machines are coupled to a common mechanical load without rigid connection. The two machines (NM1, NM2) may be arranged to drive a rail vehicle through smooth rail wheels attached to the machine rotor axles. A single, variable-frequency, inverter (NI) drives both machines and is connected to part (MP) of each machine winding. Other parts (AP) of each machine winding are connected together by a link (NC). In operation power (real or reactive) is transferred between the machines along the link to equalize the torque of the machines. Run-away of one machine while the other stalls is thereby avoided. Such run-away could occur if two machines are simply connected to a common inverter supply.
386718
Kuznetsov Stephen B.
Laithwaite Eric R.
Fetherstonhaugh & Co.
National Research Development Corporation
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