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一般的变频器硬件系统结构框图如图1所示。其核心器件是构成逆变电路的电力半导体开关器件,目前使用最多的是功率晶体管(GTR)和绝缘栅双极晶体管(IGBT)两种。变频器控制核心一般采用在单片机硬件系统支持下,由软件完成变频及各类保护、显示、报警中的计算和比较等任务。尽管变频器可靠性较高,保护功能完善,但若使用不当仍可能发生故障,因此日常检查和定期维护是不可缺少的。使用合理、维护得当能延长变频器使用寿命,并减少
General inverter hardware system block diagram shown in Figure 1. The core device is the power semiconductor switching devices that constitute the inverter circuit. Currently, the most commonly used are the power transistor (GTR) and the insulated gate bipolar transistor (IGBT). Inverter control core generally used in hardware support for the microcontroller, the software to complete the frequency and various types of protection, display, alarm in the calculation and comparison tasks. Despite the high reliability and protection functions of the frequency converter, faults can occur if used improperly, so routine inspections and regular maintenance are indispensable. Reasonable use and proper maintenance can prolong the service life of the inverter and reduce it