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Methods, systems and apparatus for adjusting duty cycle of pulse width modulated (PWM) waveforms
Methods, systems and apparatus for adjusting duty cycle of pulse width modulated (PWM) waveforms
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机译:用于调整脉宽调制(PWM)波形的占空比的方法,系统和装置
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摘要
Embodiments of the present invention relate to methods, systems and apparatus for controlling operation of a multi-phase machine in a vector controlled motor drive system when the multi-phase machine operates in an overmodulation region. The disclosed embodiments provide a mechanism for adjusting a duty cycle of PWM waveforms so that the correct phase voltage command signals are applied at the angle transitions. This can reduce variations/errors in the phase voltage command signals applied to the multi-phase machine so that phase current may be properly regulated thus reducing current/torque oscillation, which can in turn improve machine efficiency and performance, as well as utilization of the DC voltage source.
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