Abstract
Three phase voltage source Z-source PWM rectifier can not only achieve conventional PWM rectifier's function, but also achieve the output voltage buck conversion, and improve the anti-jamming capability of leg-switching tube. The Z-source PWM rectifier is equivalent to two control systems: the PWM rectifier of AC side and the Z-source network buck conversion of DC side. Focus of the study was the state space average modeling approach of DC side. Then the small-signal control system model and the transfer function from shoot-through duty to output voltage were obtained. For the problems of output voltage's large ripple and poor stability when DC-side Z-source network used voltage single-loop control system, a double-loop control system was proposed which contains inner loop of Z-source inductor current and outer loop with output voltage, and the parameter design method of double closed-loop PI regulator was analyzed. Simulation and experiments showed that the Z-source rectifier model and the design of control system was correct and feasible.
| Original language | English |
|---|---|
| Pages (from-to) | 16-22 |
| Number of pages | 7 |
| Journal | Dianji yu Kongzhi Xuebao/Electric Machines and Control |
| Volume | 19 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Jan 2015 |
| Externally published | Yes |
Keywords
- Buck conversion
- Control strategy
- Rectifier
- Shoot-through zero vector
- Small signal model
- Z-source
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