在受控速度和温度条件下测试了两台变速热泵，以表征系统性能以及压缩机、电机和逆变器损耗。热泵是从两家日本制造商的国内生产线中挑选出来的。两人都使用滚动活塞式压缩机。一个由无刷直流电机驱动；另一种是三相交流感应电动机。对每个逆变器控制电路进行分析，以确定在不改变逆变器输出波形的情况下独立控制压缩机转速的方法。 通过制冷剂侧测量，确定了在一定速度和室外温度范围内，每个热泵的加热和制冷能力以及COP。每台压缩机都被拆解，电机分别在测功机上进行测试，以测量电机和逆变器的效率。给出了效率和热力学性能结果，以及进一步测试的观察结果和建议。单位:双引文:研讨会，ASHRAE交易，1988年，第94卷，pt。2、渥太华

Two variable-speed heat pumps were tested under controlled speed and temperature conditions to characterize system performance and compressor, motor, and inverter losses. Heat pumps were selected from the top of the domestic product line from two Japanese manufacturers. Both employed rolling-piston compressors. One was driven by a brushless DC motor; the other, a three-phase AC induction motor. Each inverter control circuit was analyzed to determine a means for controlling the compressor speed independently without altering the inverter output waveform. Heating and cooling capacity and COP were determined for each heat pump for a range of speeds and outdoor temperatures, using refrigerant-side measurements. Each compressor was disassembled, and the motors were tested separately on a dynamometer to measure motor and inverter efficiencies. Efficiency and thermodynamic performance results are presented, along with observations and recommendations for further testing.Units: Dual