| Title |
Improved instantaneous Following Control Function for High Power Factor PWM Matrix Converter |
| Keywords |
Bidirectional Static Switch ; Mapping Control Function ; Sector ; Sampling Period |
| Abstract |
Matrix converters have been studied for eliminating dc link of conventional converter-inverter system, and various modulation strategy have been proposed. Therefore, matrix converter have no energy storage component except for small ac filter for the elimination of switching ripple, and can be made compact and highly reliable compare with the dc link inverter system. Matrix converter, however, directly connected the input and the output terminals by bidirectional static switch. As a result, if the input voltage are asymmetrical, and contain harmonics, the influence of the distortions directly appear on the output terminal. This problem is a major obstacle to the matrix converters. A new control method using average comparison strategy have been proposed in this paper. This control method realizes sinusoidal input and output current. unity input displacement factor regardless of load power factor. Moreover, compensation of the asymmetrical and/or harmonic containing input voltage is automatically realized, and calculation time of control function is reduced. |