3kVA高频软开关航空静止变流器并联模块研究

Research of 3 kVA Parallel Aviation Static Inverter Modular

采用公用电压外环方案 ,实现了三台 1 k VA基于高频零电压开关航空静止变流器模块的并联输出。三台航空静止变流器模块均为电压、电流双环控制 ,通过公用电压调节器稳定并联系统的输出电压及频率 ,同时产生统一的模块电流给定信号。各并联模块工作于电流跟踪模态 ,从而实现各航空静止变流器模块的均流并联。该并联方案仅有一条均流控制线连接且无须外加均流控制电路 ,不需要输出隔离变压器以及复杂的均流控制电路 ,具有简单可靠、均流精度高、体积小、重量轻和组合方便等优点 ,可以有效地提高航空静止变流器的可靠性。

An aviation static inverter (ASI) parallel system is presented based on common voltage loop control. The system is made up of three paralleled modules based on high frequency zero voltage switch 1 kVA ASI. Each module is controlled by voltage current two closed loops. The common voltage loop controls system output voltage & frequency, and generates a common reference current signal. Each module tracks the signal as current source module, therefore each paralleled module shares the load current. The system can get excellent load current sharing by only an interconnected line without output transformer and complex current sharing controller. Experiments prove the high power density and the flexibility of the system. The reliability, the expandability and the maintenance of ASI system are effectively improved.