DTC strategy for a DSP-based Five-Level Flying-Capacitor Drive with improved flux estimation

作者：Arasteh Mohammad^*; Rahmati Abdolreza; Farhangi Shahrokh; Abrishamifar Adib

来源：Przeglad Elektrotechniczny, 2011, 87(6): 132-139.

• direct torque control
• switching table
• flying capacitor multilevel inverter
• flux estimation

This paper gives a detailed analysis of direct torque control (DTC) strategy in a five-level drive and proposes a 24-sector switching table. Also, flux estimation has been improved by a discrete-time low-pass filter (LPF) with variable cut-off frequency. Algorithm to compensate the amplitude and phase errors is introduced and algorithm to determine digital filter coefficients at different speeds is presented. Simulation and practical results on a prototype using an induction motor 400V, 3kVA are given. To implement the DTC strategy, processor TMS320F2812 is used.

• 出版日期2011