Abstract
The paper proposes a multilevel single-phase rectifier-inverter with the cascaded connection of two three-arm converters. A semisinusoidal PWM switching technique is developed to form a five-level switching pattern on the rectifier side and the inverter side simultaneously. The DC-link voltages of two converters are regulated with one voltage controller. Balance of two DC-link voltages is controlled with a feed-forward adjustment of the PWM control signal. Multiple-loop controller design of the system is presented. The feed-forward-plus-feedback control technique is employed for regulating both the rectifier current and the inverter voltage. A 2kVA/220V/60Hz prototype system is set up and its control circuit is realised based on Matlab real-time control. Effectiveness of the proposed circuits is confirmed with some experimental results.
| Original language | English |
|---|---|
| Pages (from-to) | 719-725 |
| Number of pages | 7 |
| Journal | IEE Proceedings: Electric Power Applications |
| Volume | 153 |
| Issue number | 5 |
| DOIs | |
| State | Published - 2006 |