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Обеспечение электромеханической совместимости в частотно-регулируемых асинхронных электроприводах при регулировании частоты ШИМ

Обеспечение электромеханической совместимости в частотно-регулируемых асинхронных электроприводах при регулировании частоты ШИМ

Abstract

Рассмотрены вопросы обеспечения электромеханической совместимости в асинхронных электроприводах. Для исследования электромеханических процессов в системах с автономными ШИМ-инверторами напряжения и асинхронными двигателями разработана компьютерная модель привода. Расчеты на модели показали, что непрерывное изменение частоты опорного напряжения инвертора во времени позволяет на порядок уменьшить амплитуды высших гармоник тока и электромагнитного момента двигателя при их неизменных коэффициентах искажения. Вследствие уменьшения амплитуд гармоник момента происходит снижение вибраций электропривода. Потери в двигателе изменяются незначительно. Изменение частоты опорного напряжения в заданном диапазоне частот не должно осуществляться с частотой питающих двигатель токов.

Provision of electromechanical compatibility of asynchronous drive is considered. A computer drive model has been developed to investigate electromechanical processes in systems with PWM-inventors and asynchronous motors. Model calculations show that continuous change in the reference voltage frequency enables a multiple decrease of the amplitude of higher harmonics and electromagnetic torque with constant distortion factor. Vibrations of the electric drive may be decreased due to the reduced amplitudes of the torque harmonics. Motor losses change insignificantly. Variation of the reference voltage frequency within the given range should not to be implemented with frequency of motor supply currents.

Keywords

АВТОНОМНЫЙ ИНВЕРТОР НАПРЯЖЕНИЯ,REFERENCE VOLTAGE FREQUENCY,АСИНХРОННЫЙ ДВИГАТЕЛЬ,INDUCTION MOTOR,ШИРОТНО-ИМПУЛЬСНАЯ МОДУЛЯЦИЯ,PULSE WIDTH MODULATION,ЧАСТОТА ОПОРНОГО НАПРЯЖЕНИЯ,ВЫСШИЕ ГАРМОНИКИ,HIGHER HARMONICS,ПУЛЬСАЦИИ ЭЛЕКТРОМАГНИТНОГО МОМЕНТА,ELECTROMAGNETIC TORQUE PULSES,ЭЛЕКТРОМЕХАНИЧЕСКАЯ СОВМЕСТИМОСТЬ,ELECTROMECHANICAL COMPATIBILITY,SELF-EXITED INVERTER

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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