| 摘要 |
A method for identification of electromagnetic parameters of asynchronous motors with quasi-harmonic signals of voltage and current includes connection of the test engine to the source of sinusoidal voltage with set level of harmonics through sensors of voltage and current, application of voltage to the motor, registration in digital representation of voltages and currents of phases, mathematical processing of the results obtained through expansion of the curves of voltage and current to Fourier series, determination of harmonic components of instantaneous power of phases, compilation of the system of identification equations on basis of the equations of balance of harmonics of power of the elements of the displacement circuit of the motor, determination of electromagnetic parameters of asynchronous motors through solving the system of identification equations. The periods of sinusoidal signals of voltage and current are restricted at the left and the right sides by given angle, with expansion of the voltage and current signals obtained to Fourier series with restricted period of signals, with determination of harmonic components of voltage and current, with determination of components of harmonics of instantaneous power, determination of electromagnetic parameters and components of harmonics of current in sections of the equivalent circuit of asynchronous motor. |
