Microcontroller-Based Variable Speed Drive for Three-Phase Induction Motor in Cooling Applications  

作　　者：Kondapalli Siva Rama Rao Lee Teng Hong 

机构地区：[1]Department of Electrical and Electronics Engineering, Universiti Teknologi PETRONAS, Tronoh 31750, Malaysia

出　　处：《Journal of Energy and Power Engineering》2012年第4期656-662,共7页能源与动力工程（美国大卫英文）

摘　　要：This paper presents an electronic VSD （variable speed drive） for three-phase IM （induction motor） using a microcontroller. The VSD is designed for cooling applications where the 1M is coupled to a cooling fan. The drive receives temperature feedback from objects to be cooled and output a corresponding frequency to the IM. A prototype of the VSD is constructed to control a 175 W, four pole, squirrel cage three-phase IM. The heart of the control circuit is a low-cost microchip＇s PICI6F777 microcontroller which is programmed using C language to generate variable frequency SPWM （sinusoidal pulse width modulation） switching signals. These switching signals are fed to an 1GBT inverter. The VSD constructed can be switched between two modes of speed control＂ automatic temperature-controlled mode and manual user-controlled mode. Cost savings using the prototype are demonstrated.

关 键 词：IGBT inverter PIC microcontroller SPWM three-phase induction motor variable speed drive. 

分 类 号：TM343.2[电气工程—电机] TP368.1[自动化与计算机技术—计算机系统结构]