Abstract
Under the conventional pulse width modulation (PWM) + sinusoidal pulse width modulation (SPWM) hybrid control, the discontinuous conduction mode (DCM) single-leg-integrated boost (SLIB) inverter confronts an over-modulation problem under a wide change in load, leading to the distorted output waveform. One approach to address this issue is to keep the boost-leg duty cycle constant and regulate load power. However, it is not suitable for standalone or PV grid-connected power systems. Therefore, a pulse frequency modulation (PFM) + SPWM hybrid control scheme is proposed to overcome the shortcomings in this paper. Under the proposed scheme, the boost-leg of the inverter works in PFM while the other leg works in SPWM. Since the DC-link voltage is controlled by frequency, instead of load power or duty cycle, the inverter can avoid over-modulation for a wide load range and be applied on occasions where the load power is non-adjustable, which is more practical in comparison with the counterpart. The feasibility of the proposed hybrid control is verified by experiment through a 500 W prototype.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
