在过去几年中，变速驱动器（VSD）已经发生了变化，采用了新的功率半导体和脉宽调制（PWM）晶体管开关方法。驱动技术的这些进步在感应电动机的应用中引起了新的关注。本文描述了电机/驱动装置的运行情况，并给出了组合试验结果，可帮助应用工程师设计可靠的HVAC风机和泵驱动系统。本文的重点是三个关键领域:1）PWM驱动dv/dt描述及其对感应电机的影响；2） 变速应用的电机绝缘系统；3）驱动载波频率的可听电机噪声考虑。 由于错误使用变速系统，在实际安装中会发生电机故障。这些将被调查和描述，以帮助设计工程师避免未来的应用问题。在规范和安装过程中，为设计工程师提供了几种备选方案。本文总结了基于试验数据和现场经验得出的结论，以指导现代变速HVAC驱动器和电机的成功应用。单位:双引证:研讨会，ASHRAE交易，1998年，第104卷，第2部分，多伦多

Variable-speed drives (VSDs) have changed over the last few years using newer power semiconductors and pulse width modulation (PWM) transistor switching methods. These advancements in drive technology have caused new concerns in their application on induction motors. This paper describes motor/drive operation and presents combination test results that can assist application engineers in designing reliable HVAC fan and pump drive systems. The focus of this paper is in three key areas: 1) PWM drive dv/dt description and its effects on induction motors; 2) motor insulation systems for variable-speed applications; and 3) audible motor noise considerations from drive carrier frequencies. Motor failures are occurring in actual installations due to misapplication of variable-speed systems. These will be investigated and described to help design engineers avoid future application problems. Several alternatives during specification and installation are offered as suggestions to the design engineers. Conclusions based on test data and field experience are summarized as a guide to successful applications of modern variable-speed HVAC drives and motors.Units: Dual