| Abstract [eng] |
The mechanical characteristics of the up to date induction motors are very different. They often are expressed by the Kloss formula, but these formulas are dissimilar of real. The mechanical characteristics of the motor expressed by the Kloss formula invaluable squirrel cage the end of a pole of rotor crowding-out effect of current. Many the up to date induction motors are produce already with define mechanical characteristics, which mathematical expression is unknown. The starting time of the three - phase induction motors can be determined using the equation of the movement of the electric drive putting down into this equation the mechanical characteristics of the mechanism and motor. The analysis of the method letting to express the mechanical characteristics of the motor as the polynomial function is carried out. Using this expression of the mechanical characteristics of the induction motor and the equation of the movement of the drive, the method for determination of the starting time is developed. |
