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The photovoltaic (PV) source simulators are widely used to test solar inverters, evaluate their control algorithms and study their grid integration issues in the laboratory settings. Many commercial programmable dc power supplies can be re-programed to be PV simulators. Due to the bulky output dc capacitors, the dynamic response and the bandwidth of these PV simulators are significantly limited, which,...
An indirect matrix converter (IMC) is a direct ac-ac power converter. As an improvement of the output waveform quality, several types of three-level IMC are proposed and investigated. However, two major problems of these converters still exist. First, in some specific situations, such as wind energy conversion systems and flexible ac transmission systems, these converters’ capabilities of generating...
A five-leg inverter can be used to feed two motors, which reduce the system cost and realize fault-tolerant operation of dual motor drive system. In this paper, a PWM modulation method is developed for the five-leg inverter, in which the control period is divided into two parts and the traditional Space Vector PWM (SVPWM) technology is adopted in both parts. This PWM method is suitable to be implemented...
This paper presents the improved modulation strategy of Two-Stage Matrix Converter (TSMC) for applications in aircraft Electro-Mechanical Actuator (EMA) system. In the modulation of rectifier stage, Phase Locked Loop (PLL) is employed to track the instantaneous value of both the angle and the frequency of the input voltage vector. The frequency is then taken into calculation to compensate the angle...
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