Carrier-based PWM Method for Indirect Matrix Converters based on Space Vector Analysis

Abstract

In this paper, a novel approach to realize the carrier-based pulse width modulation (CBPWM) method for indirect matrix converter (IMC) is presented. The advantage of the proposed CBPWM method is that only one triangular carrier signal with constant gradient falling and rising edges is used to generate the PWM to the power switches in both the rectifier and the inverter stages of IMC. The analysis of the proposed CBPWM method is based on the space vector approach and the relationship between CBPWM and space vector pulse width modulation (SVPWM) methods is provided. In this paper, four CBPWM methods called: sinusoidal PWM, third harmonic injection PWM, symmetrical PWM and discontinuous PWM are presented. These different CBPWM schemes are established according to the distribution of zero vectors and the switching pattern of the SVPWM method. The comparison of output voltage performance with different CBPWM schemes are investigated. Compared to the conventional method the calculation time of the proposed method is reduced around 50%. Concretely, the calculation time of the SVPWM method is 45 μs, while the calculation time of the proposed method is 22 μs. The experiments have been carried out to show the effectiveness of the proposed method.

Modified PDPWM control with MPPT algorithm for equal power sharing in cascaded multilevel inverter for standalone PV system under partial shading

“…The boost converter is consisting of a source of DC voltage, an inductor, a filter capacitor, a diode, and a switch as shown in Figure 4. The equation below shows how to calculate the output voltage of boost converter as (10).…”

“…There are three main types of modulation methods that can be used with MMCs. They are; i) stair-step modulation, like selective harmonic elimination (SHE) [6], nearest level modulation (NLM) [7], and sub module-unified PWM (SUPWM) [8], ii) space vector PWM (SVPWM) [9], [10], iii) carrier-based modulation it can be further subdivided into two groups carrier disposition (CDPWM) including phase-disposition PWM (PD-PWM) [11]- [13], phase opposite disposition PWM (POD-PWM) [14] and, alternative phase opposite disposition PWM (APOD-PWM) [15] and phase-shifted PWM (PS-PWM) [11], [12], [16]. In [11], [12], [17], simulation and/or tests were used to compare various PWM approaches.…”