| 摘要 |
FIELD: electric machine industry. ^ SUBSTANCE: in control method the change in slip is performed by adjustment of EMF induced in rotor by means of controlled change of exiting field characteristics which field is generated by stator winding work. Required change in exiting field characteristics is achieved by means of the following: on magnetic field generated by work of normal (standard) stator winding of asynchronous motor, opposite in sign magnetic field is additionally imposed which is rotating at the same speed and in the same direction and which is generated by parallel work of additionally built in stator winding with proportionally increased number of turns in all coils. Additional stator winding in its geometry is inverted image of standard stator winding (with opposite direction of winding) through which additional winding relatively small for effectiveness, variable part of common stator current drawn at the input to standard stator winding is passed with the same phases, frequencies and in the same order as through standard stator winding. Due to this motor performance characteristics become functions of variable parameters of not compensated part of main magnetic field generated by standard stator winding work. Portion of current passed through additional winding is selected with such intention that its adjustment in necessary limits is reasonably effective. ^ EFFECT: gain in control performance. |
