Abstract
The maximum boost control method for a single-phase switched-boost inverter (SBI) and single-phase Z-source inverter (ZSI) is proposed in this paper. In the proposed method, the low frequency voltage is added to the constant voltage for generating the variable shoot-through time intervals. For improving the AC output quality of the inverter, an active power switch is used to replace one of the diodes in the single-phase SBI. The operating principles and circuit analysis using the proposed maximum boost control method for single-phase inverters are presented. Laboratory prototypes are built to verify the operation of the proposed pulse-width modulation (PWM) control method for both single-phase quasi-ZSI and single-phase quasi-SBI.
Highlights
Many control schemes including carrier-based pulse-width modulation (CB-PWM) and space vector pulse-width modulation (SV-PWM) have been proposed for controlling the shoot-through time interval in three phase Z-source inverters (ZSIs) [1,2,3,4,5,6,7]
In the simple boost control method, a constant voltage is compared to a high frequency triangle waveform to generate a fixed shoot-through control signal
The PWM control signals for power switches were generated from a TMS320F28335
Summary
Many control schemes including carrier-based pulse-width modulation (CB-PWM) and space vector pulse-width modulation (SV-PWM) have been proposed for controlling the shoot-through time interval in three phase Z-source inverters (ZSIs) [1,2,3,4,5,6,7]. Four basic CB-PWM control techniques, namely simple boost control [1], maximum boost control [2], maximum constant boost control [3], and modified SV-PWM methods [6,7] for three-phase ZSIs were compared in [8]. ZSIs, most PWM controls use the simple boost control method [9,10,11,12,13,14,15,16]. In the simple boost control method, a constant voltage is compared to a high frequency triangle waveform to generate a fixed shoot-through control signal. In the hybrid PWM strategy, a combination between PWM and pulse-amplitude modulation (PAM) is addressed for the single-phase quasi-Z source inverter (qZSI). When the AC output voltage is higher than the DC source voltage, the PAM strategy is applied
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