INDUCTION MOTOR CONTROL METHOD Russian patent published in 2007 - IPC H02P23/08 H02P27/06 

FIELD: electrical engineering; controlling induction motors including traction ones.

SUBSTANCE: proposed method involves evaluation of induction motor voltage frequency as sum of rotor frequency of rotation plus its optimal slip. Optimal slip and desired value of voltage U are found as function of signal M_d from voltage regulator output corresponding to respective desired electromagnetic torque, rated electromagnetic torque M_r, rated synchronous frequency of motor rotation f_1r, rated electromagnetic torque M_r, rated frequency f_2r of motor rotation, and rated voltage U_r of induction motor from definite formulas.

EFFECT: provision for maintaining optimal conditions throughput entire range of rotor frequency of rotation at actually constant power factor, overload ratio, and absolute slip.

1 cl, 3 dwg