| |
VARIABLE OPTIMAL PWM FOR VOLTAGE SOURCE RECTIFIERS AND CURRENT SOURCE INVERTERS
| [View]
[Download]
|
| Author(s) |
A. J. Perin; A. A. da Cunha; M. A. de Oliveira |
| Abstract |
This paper describes a scheme to create optimal PWM patterns to control the DC output voltage of the three-phase voltage rectifiers with low order harmonics of low amplitude. The line power factor can be kept near unity. The ripple of the DC output voltage decreases with the number of pulses in the modulation period (switching frequency). Identical optimal PWM patterns can be utilized in the current source three-phase inverters with the control of the fundamental output current and elimination of the low order harmonics. The proposed scheme to create the PWM pattern allows the elimination of a great number of low order harmonics. A numerical technique is applied to solve the non-linear equations of the problem. The off-line optimization of the individual switching angles requires a microcomputer. The control circuits of the power semiconductors can be implemented with programable memories and analog and digital circuits, without a microprocessor system. Satisfactory theoretical and experimental results are confirmed. |
| Download |
| Filename: | Unnamed file |
| Filesize: | 582.4 KB |
|
| Type |
Members Only |
| Date |
Last modified 2021-02-10 by System |
| |
 |