Investigation of Stator Voltage Oscillations in an Asynchronous Motor Within a High-Frequency Specialized Electric Drive
摘要
The research results on the influence of electrical engineering modes of a high-frequency induction complex on an asynchronous motor in the composition of a specialized electric drive, which ensures the stability of the high-frequency single-phase generator mode, are presented. A scientific and technical solution for anticipating stator voltage distortions of the asynchronous motor, which is one of the factors influencing the provision of static stability of the generator, is proposed. The operability of the compensation filter for anticipating stator voltage distortions in the motor was tested experimentally. It is shown that in the frequency range ± 50, the error does not exceed 3% of the amplitude value of the voltage in the most unfavorable modes caused by noises simulating the dynamic modes of PWM. Thus, the proposed compensation filter allows anticipating noise impact amplitudes and compensating for the distortions of the first harmonic amplitude and the voltage phase. A comparative analysis of the results of the conducted studies showed that the developed method differs in significant simplicity when solving practical problems and in the algorithmic simplicity of software implementation compared to those obtained using the Kalman filter. The developed algorithm confirms the specificity of the solved task, the synthesis of a structural diagram of anticipatory compensation for distortions in combination with directive modes of power elements. At the same time, the reliable operation of a specialized electric drive, microprocessor and software methods of automation (intelligent structures) of an asynchronous electric motor with microprocessor and software devices for anticipatory compensation and an induction technological complex is carried out. The consistency of all power executive mechanisms, controlling intellectual structures, electromagnetic and electromechanical parameters is confirmed by modeling the specialized electric drive under the influence of random factors.