注意，电动可调速驱动器（ASD）因其节能和易于操作而越来越多地用于暖通空调设备。描述了三种现代功率计和分析仪的现场和实验室测试，将其置于空调和热泵中使用的三种最常见ASD技术（PWM感应、DC无刷和开关磁阻驱动）产生的波形下。结果表明，一些仪表可以准确测量ASDs输入端的电功率。然而，用于直流无刷和开关磁阻技术的ASD的功率输出未通过任何测试仪表以可接受的精度进行测量。给出这些不准确的可能原因，以及改进性能的建议。关键词:1997年，电气装置，性能，测试，实验室测试，计量引用:ASHRAE Trans。1997年，第103卷，第1部分，论文编号4035（RP-770），235-240，图5，表4，参考文献4。

Notes that electric adjustable speed drives (ASDs) are increasingly used in HVAC equipment because of the energy savings and ease of operation they offer. Describes field and laboratory tests of three modern power meters and analysers by subjecting them to waveforms produced by the three commonest ASD technologies used in air conditioners and heat pumps - PWM induction, DC- brushless and switched-reluctance drives. The results show that some meters can accurately measure electric power at the input to ASDs. However the power output of ASDs for DC-brushless and switched-reluctance technology was not measured with acceptable accuracy by any of the tested meters. Gives possible reasons for these inaccuracies and suggestions for performance improvement.KEYWORDS: year 1997, Electrical installations, performance, testing, laboratory testing, meters